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WO2018123535A1 - Instrument de ponction à usage unique - Google Patents

Instrument de ponction à usage unique Download PDF

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Publication number
WO2018123535A1
WO2018123535A1 PCT/JP2017/044339 JP2017044339W WO2018123535A1 WO 2018123535 A1 WO2018123535 A1 WO 2018123535A1 JP 2017044339 W JP2017044339 W JP 2017044339W WO 2018123535 A1 WO2018123535 A1 WO 2018123535A1
Authority
WO
WIPO (PCT)
Prior art keywords
locking ring
lancet
housing
locking
rotation
Prior art date
Application number
PCT/JP2017/044339
Other languages
English (en)
Japanese (ja)
Inventor
弘三 石倉
智彦 内村
Original Assignee
ニプロ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ニプロ株式会社 filed Critical ニプロ株式会社
Priority to JP2018558988A priority Critical patent/JP7001065B2/ja
Publication of WO2018123535A1 publication Critical patent/WO2018123535A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades

Definitions

  • the present invention relates to a puncture device that is used to puncture the skin and collect a small amount of blood, and more particularly to a disposable puncture device that is discarded after a single use.
  • SMBG blood glucose self-measurement
  • Such a puncture device is generally configured such that a lancet housed in a housing is urged by a spring member, and a puncture body provided at the tip of the lancet is projected from the housing to perform a puncture operation.
  • Patent Document 1 Japanese Patent Application Publication No. 2007-521031
  • the operation member of the housing was pushed and arranged behind the lancet.
  • the spring member is compressed and deformed.
  • the lancet protrudes from the housing and is punctured.
  • Patent Document 2 Japanese translations of PCT publication No. 2007-536008 (Patent Document 2) and Japanese Patent No. 3964457 (Patent Document 3), a pressing operation member for compressing and deforming a spring member is provided with an abutment portion for unlocking.
  • a structure has been proposed in which, when the pressing operation member reaches a predetermined position, the abutting portion abuts on the locking piece of the lancet locked to the housing to release the locking.
  • the force required for deforming and releasing the latching piece of the lancet must be exerted on the pressing operation member. Inevitably increased.
  • Patent Document 4 International Publication No. 2005/110225 (Patent Document 4) and US Patent Application Publication No. 2005/0070945 (Patent Document 5), a locking piece to the housing of the lancet is pressed from the lateral direction.
  • the central axis of the lancet shifts and is caught by other members when a pressing force from the lateral direction is exerted on the locking piece provided on the lancet. Since the frictional resistance at the time of the protrusion operation is increased by being pressed against the other member, the movement of the lancet at the time of the protrusion operation may be hindered.
  • Patent Document 6 Japanese Patent No. 3993529
  • the lancet is rotatable in the circumferential direction with respect to the housing, and the locking of the lancet to the seating surface formed on the inner surface of the housing is released by rotating the lancet.
  • the structure to be disclosed is also disclosed, if the lancet is rotated by applying a rotational force to the lancet, there is a risk that it will be difficult to ensure sufficient release of locking and stability of the protrusion operation due to deformation or displacement of the lancet. It is difficult to rotate only the lancet while being urged by the spring member, and there is a possibility that the urging operation is adversely affected by deformation of the spring member.
  • Patent Document 7 In Japanese translations of PCT publication No. 2007-536000 (Patent Document 7), the lancet is urged and rotated by abutting the shielding object against the skin and being pushed inward of the housing.
  • a puncture device in which puncture is performed by disengaging from the lancet.
  • the operation of unscrewing or pulling the tip guard (needle cap) before puncturing may cause the lancet to rotate unintentionally and cause the malfunction of the engagement between the shield and the lancet.
  • the present invention has been made in the background of the above-mentioned circumstances, and the problem to be solved is holding the lancet in the compressed position of the spring member at the puncture preparation position, and puncturing operation by releasing the lock. It is an object of the present invention to provide a disposable puncture device having a novel structure that can be reliably and stably operated.
  • a first aspect of the present invention is a disposable puncture device in which a lancet accommodated in a housing is urged by a spring member, and a puncture body provided at the tip of the lancet projects from the housing to perform a puncture operation
  • a locking ring is disposed in the housing, the lancet penetrates the locking ring and is displaceable in a protruding direction, and the lancet is provided with a locking projection,
  • the spring member is compressed and deformed by the locking action of the locking protrusion on the locking ring, and the lancet is held at the puncture preparation position at the back of the housing.
  • An operation member is provided for releasing the locking of the locking projection to the locking ring by rotating the locking ring and displacing the lancet in the protruding direction by the spring member to perform a puncturing operation. Furthermore, in a state in which the rotation of the locking ring is allowed, a restriction that restricts the rotation of the locking ring that is not based on the operation of the operation member by exerting a resistance to the rotation of the locking ring. Means are provided.
  • a locking ring separate from the housing and the lancet is adopted, and the locking ring is rotated to be biased by a spring member to prepare for puncturing.
  • the lancet held in position can be unlocked and puncture operation can be performed. Therefore, the spring member compressed in advance at the puncture preparation position can exert a stable urging force on the lancet to perform the puncture operation.
  • the operating force for puncturing operation is applied directly to the lancet in the lateral direction, there is an increase in hooking and frictional force on other members due to the deviation of the central axis of the lancet. This prevents a stable puncturing operation.
  • the locking ring that is operated to rotate can only be rotated, so that the puncture operation can be easily and stably performed. .
  • a restricting means for restricting the rotation of the locking ring that is not based on the operation of the operation member is provided. It is possible to prevent the locking ring from unintentionally rotating before the operation and releasing the locking projection from the locking ring. Therefore, the lancet can be stably held at the puncture preparation position before the operation member is operated, and the puncture operation by the operation of the operation member is realized.
  • an inner and outer periphery in which the locking ring and the housing that rotatably supports the locking ring are opposed in a radial direction.
  • the restricting means is configured by providing a contact portion that generates resistance due to mutual contact during relative rotation on the surface.
  • the contact portion that constitutes the restricting means is provided between the locking ring and the housing in the radial direction, the resistance force by the contact portion is reduced. It is possible to avoid being directly applied to the lancet.
  • the housing in the disposable puncture device according to the second aspect, includes a housing main body and a housing mouth provided on a distal end side of the housing main body,
  • the housing mouth body is provided with a support cylinder portion extending toward the base end side, and the locking ring is extrapolated to the support cylinder portion, and the support cylinder portion and the locking ring
  • the abutting part is provided between the radial directions.
  • the locking ring can be rotatably supported on the inner peripheral surface and disposed in the housing.
  • an inner peripheral convex portion extending in the axial direction is provided on the outer peripheral surface of the support cylinder portion, and the locking ring
  • An outer peripheral convex portion extending in the axial direction is provided on the inner peripheral surface of the inner peripheral surface, and the inner peripheral convex portion and the outer peripheral convex portion are provided when the locking ring is rotated relative to the support tube portion in the circumferential direction. Abut against each other to resist the rotation of the locking ring with respect to the housing, and the inner circumferential convex portion and the outer circumferential convex portion cross over each other, thereby causing the operation member to operate based on the operation of the operating member.
  • the contact portion that allows the locking ring to rotate is configured.
  • the contact ring is inadvertently restricted by the contact between the inner peripheral convex portion and the outer peripheral convex portion, while the operation member is engaged. After the stop ring is rotated and the outer circumferential convex portion gets over the inner circumferential convex portion, the locking ring can be smoothly rotated to realize a good puncturing operation.
  • the inner peripheral side convex portion and the outer peripheral side convex portion are arranged in the circumferential direction with the support tube portion and the locking ring. Are provided at equal intervals in the circumferential direction.
  • the overpass reaction force of the outer peripheral convex portion exerted in the direction perpendicular to the axis of the locking ring with respect to the inner peripheral convex portion is plural. It is canceled out between the inner and outer convex portions. As a result, the axial perpendicular displacement between the lancet to be punctured and the locking ring is suppressed, and the puncture operation can be further stabilized.
  • the disposable puncture device according to the first aspect, wherein the locking ring includes an axially front surface of the locking ring and the housing that rotatably supports the locking ring.
  • the restricting means is configured by providing a contact portion that generates resistance due to mutual contact during relative rotation between the axially facing surface of the ring facing the axially front surface. is there.
  • the contact portion constituting the restricting means is provided between the axially opposed surfaces of the locking ring and the housing. Even when the stop ring is rotated, the action of the external force in the direction perpendicular to the axis with respect to the lock ring, and hence the axial displacement between the lock ring and the lancet in the direction perpendicular to the axis can be suppressed.
  • the axially opposed surface of the housing is provided with the locking when the locking ring is rotated relative to the housing.
  • the abutting portion that abuts on the ring and moves the locking ring to the rear side in the axial direction is provided, and the rotation of the locking ring based on the operation of the operating member locks the locking ring.
  • the locking ring is allowed to move rearward in the axial direction by the corresponding contact portion against the urging force of the spring member exerted by the lancet.
  • the disposable puncture device structured in accordance with this aspect, it is possible to constitute a restricting means for restricting inadvertent rotation of the locking ring by skillfully utilizing the urging force of the spring member that punctures the lancet. .
  • the axially rear surface of the locking ring, and the locking protrusion of the lancet locked to the locking ring is configured by providing an abutting portion that generates a resistance due to mutual abutting with respect to relative rotation.
  • the contact portion constituting the restricting means is provided between the axially opposed surfaces of the locking ring and the lancet. Even when the ring is rotated, the action of the external force in the direction perpendicular to the axis with respect to the locking ring, and hence the axial displacement between the locking ring and the lancet in the direction perpendicular to the axis can be suppressed. Further, the restricting means for restricting inadvertent rotation of the locking ring can be configured by skillfully using the locking protrusion of the lancet.
  • an axial convex portion is provided on the axially rear surface of the locking ring, and the locking ring has a circumferential surface with respect to the housing.
  • the locking projection of the lancet and the axial convex portion of the locking ring abut against each other to resist the rotation of the locking ring, and the lancet Moves to the rear side against the urging force of the spring member and escapes the axial convex portion of the locking ring, thereby allowing the locking ring to rotate based on the operation of the operating member.
  • the locking ring that is not based on the operation of the operating member by the axial projection provided on the locking ring and the locking projection of the lancet contacting each other.
  • the lancet is released from the lancet that is biased by the spring member and held in the puncture preparation position by rotating the locking ring. Can be operated.
  • the restricting means for restricting the rotation of the locking ring not based on the operation of the operation member is provided, the locking ring is prevented from unintentionally rotating, and before the operation member is operated.
  • the lancet can be more reliably held at the puncture preparation position, and the puncture operation can be performed more reliably by operating the operation member.
  • FIG. III-III sectional view of FIG. IV-IV sectional drawing of FIG. FIG. 5 is a VV cross-sectional view of FIG. 3.
  • the perspective view of the latching ring which comprises the puncture device shown by FIG. The rear view for demonstrating the effect
  • FIG. 5 for demonstrating the puncture operation
  • the longitudinal cross-sectional view corresponding to FIG. 3 which shows the puncture operation state of the puncture device shown by FIG. XVI-XVI sectional drawing of FIG.
  • the longitudinal cross-sectional view corresponding to FIG. 3 which shows after the puncture of the puncture device shown by FIG. XVIII-XVIII sectional drawing of FIG.
  • FIG. 24 is an enlarged cross-sectional view of the XXIV-XXIV cross section in FIG.
  • FIG. 25 is a cross-sectional view of the assembly of the housing mouth body and the locking ring in the puncture operation state or the state after puncture, and corresponds to FIG. 24.
  • FIG. 27 is an exploded perspective view of the puncture device shown in FIG. 26.
  • FIG. 27 is an explanatory view of the action of the locking ring in the standard state or the puncture preparation state shown in FIG. 26, and is a sectional view taken along the line XXX-XXX in FIG. 31.
  • action of the latching ring in the puncture preparation state shown by FIG. The longitudinal cross-sectional view corresponding to FIG.
  • FIG. 26 which shows the puncture preparation state of the puncture device shown by FIG.
  • FIG. 29 is a transverse cross-sectional view corresponding to FIG. 28 for illustrating the puncturing operation of the puncture device shown in FIG. 26.
  • FIG. 36 is an explanatory view of the action of the locking ring in the puncture operation state or the state after puncture shown in FIG. 33, and is a sectional view taken along the line XXXIV-XXXIV in FIG.
  • the longitudinal cross-sectional view corresponding to FIG. 26 which shows the puncture operation state of the puncture device shown by FIG.
  • FIG. 26 which shows after the puncture of the puncture device shown by FIG.
  • the perspective view of the housing mouth which comprises the housing of the disposable puncture device as the 3rd Embodiment of this invention.
  • the perspective view of the latching ring which comprises the disposable puncture device as the 3rd Embodiment of this invention.
  • 43 is a front view of the locking ring shown in FIG. 42.
  • FIG. FIG. 43 is a longitudinal sectional view showing an assembly of the housing mouth body shown in FIG. 40 and the locking ring shown in FIG.
  • FIG. 45 is a longitudinal sectional view of an assembly of a housing mouth body and a locking ring in a puncture operation state or a state after puncture, corresponding to FIG. 44.
  • FIG. 47 is a rear view of the locking ring shown in FIG. 46.
  • FIG. 47 is a perspective view showing the locking ring shown in FIG. 46 in the assembled state of the lancet and the housing mouth, and showing the puncture preparation state.
  • FIG. 49 is a cross-sectional view of IL-IL in FIG. 48.
  • FIGS. 1 to 20 referred to in the description of the basic structure, the detailed structure related to the regulating means is omitted, and the detailed structure will be described with reference to FIGS. .
  • FIG. 1 shows a plan view of a disposable puncture device 10 according to the first embodiment of the present invention.
  • An exploded perspective view, a longitudinal sectional view, and a transverse sectional view thereof are shown in FIGS. 1, 3, 4, and 5 all show the puncture device 10 in a state (standard state) provided as a product to the user in the market.
  • a lancet 14 and a compression coil spring 16 as a spring member are accommodated in the housing 12, and the needle cap 18 is removed from the lancet 14 to push the operation piece 20 of the housing 12.
  • the lancet 14 protrudes from the housing 12 and is punctured.
  • the center axis direction refers to the center axis direction of the housing 12 and the lancet 14 (left-right direction in FIG. 1), and the left direction in FIG.
  • the direction is referred to as the front or distal end side, and the right direction is referred to as the rearward or proximal end side.
  • the housing 12 is constituted by a housing main body 22 and a housing mouth body 24 each made of a resin molded product.
  • the housing main body 22 has a substantially bottomed cylindrical shape with a deep bottom, and a substantially cylindrical housing mouth body 24 is fixedly assembled to the opening portion on the front end side.
  • a spring seat 26 protruding inward from the center of the inner surface is provided on the bottom wall of the housing body 22.
  • a plurality of guide protrusions 28 that protrude on the inner peripheral surface and extend linearly in the axial direction are provided on the cylindrical wall of the housing body 22.
  • the plurality of guide protrusions 28 form a pair of guide rails 30, 30 facing each other in the direction perpendicular to the axis on the inner surface of the cylindrical wall of the housing body 22.
  • an operation piece 20 as an operation member is formed on the cylindrical wall of the housing main body 22 in an opening side portion slightly larger in diameter than the bottom wall side portion.
  • the operation piece 20 is disposed in a through window 34 formed on the peripheral wall of the housing body 22 and is partially connected to the housing body 22.
  • the operation piece 20 is displaced toward the inside of the housing body 22 based on the elastic deformation of the connecting portion by pressing the operation piece 20 with the fingers from the outside of the housing body 22.
  • an engaging rib 36 that protrudes on the outer peripheral surface and extends in the circumferential direction is integrally formed at the opening peripheral edge of the cylindrical wall of the housing body 22.
  • a large-diameter engagement ring 38 that extends in the circumferential direction is integrally formed. Note that the engagement ring 38 is connected and supported to the housing mouth 24 by connecting leg portions 40 protruding at a plurality of positions on the outer peripheral surface of the housing mouth 24.
  • the housing body 24 is combined with the opening portion of the housing body 22, and the engagement ribs 36 of the housing body 22 are engaged with the engagement ring 38 of the housing body 24, whereby the housing body 22 is engaged with the housing body 22.
  • the mouth body 24 is assembled. In this assembled state, the housing mouth 24 is positioned and fixed in the axial direction with respect to the housing main body 22 by the engaging action of the engaging rib 36 with respect to the engaging ring 38, and The housing mouth body 24 is positioned and fixed with respect to the housing main body 22 even in the circumferential direction by the engaging action with the connecting leg portion 40.
  • the housing mouth 24 extends in a cylindrical shape toward the rear on the center axis on the inner peripheral side of the engagement ring 38, thereby forming a support cylinder portion 42 that enters the housing body 22.
  • the connecting leg portion 40 projecting on the outer peripheral surface of the housing mouth body 24 is formed to extend to the outer peripheral surface of the support cylinder portion 42 in a predetermined length in the axial direction.
  • a pair of cap locking projections 47, 47 located near the opening on the front side are formed so as to protrude opposite to each other in the direction perpendicular to the axis.
  • first guide grooves 44, 44 and a pair of second guide grooves 46, 46 are opposed to each other in the radial direction and extend parallel to the axial direction. Is formed. These first guide grooves 44, 44 and second guide grooves 46, 46 both extend from the axially intermediate portion of the housing mouth 24 to the inner peripheral surface of the support cylinder portion 42, and Opened at the rear end.
  • the first guide groove 44 has a circumferential width dimension and a radial depth dimension that are larger than those of the second guide groove 46.
  • a slit 44 penetrates the peripheral wall of the support cylinder portion 42.
  • the lancet 14 is incorporated in the internal space in the accommodated state.
  • the housing mouth body 24 is preferably transparent or translucent so that the blood pool after puncture can be seen.
  • the lancet 14 is an insert-molded product, and a puncture needle 52 as a puncture body is embedded and fixed to a central axis of a lancet hub 50 made of synthetic resin having a rod shape. And the front-end
  • a spring seat 54 having an annular support protrusion that extends in the circumferential direction is formed at the rear end of the lancet hub 50.
  • a pair of guide projections 56, 56 projecting to both sides in the direction perpendicular to the axis are integrally formed on the outer peripheral surface of the rear end portion of the lancet hub 50.
  • a pair of reuse prevention protrusions 58, 58 projecting to both sides in the direction perpendicular to the axis are integrally formed on the outer peripheral surface of the front end portion of the lancet hub 50.
  • pair of locking projections 60, 60 that are positioned axially rearward from the pair of reuse prevention projections 58, 58 by a predetermined dimension and project on both sides in the direction perpendicular to the axis on the outer peripheral surface of the lancet hub 50. are integrally formed.
  • the protruding direction of the pair of reuse preventing protrusions 58, 58 and the protruding direction of the pair of locking protrusions 60, 60 are different from each other.
  • the protruding direction of the pair of reuse preventing protrusions 58 and 58 and the protruding direction of the pair of locking protrusions 60 and 60 are different from each other by 90 degrees around the central axis.
  • the protruding direction of the pair of reuse preventing protrusions 58, 58 is set in the same direction around the central axis as the protruding direction of the pair of guide protrusions 56, 56.
  • a needle cap 18 is provided on the tip side of the lancet hub 50.
  • the needle cap 18 has a rod shape, and is integrally formed by extending from the tip of the lancet hub 50 on which the puncture needle 52 is protruded on the same central axis.
  • a boundary portion between the lancet hub 50 and the needle cap 18 is a threaded portion 64 whose outer diameter is reduced in a constricted manner, and the needle cap 18 is twisted around the central axis with respect to the lancet hub 50 to form a threaded portion.
  • the needle cap 18 can be manually detached from the lancet hub 50 by being detached at 64.
  • the tip of the puncture needle 52 covered with the needle cap 18 can be exposed by removing the needle cap 18 from the lancet hub 50.
  • the tip portion of the needle cap 18 is a flat knob portion 66, and the rear end portion of the knob portion 66 has protrusions on both sides in the width direction. 68 and a tongue-like elastic claw portion 70 are formed so as to protrude in opposition to each other in the axial direction.
  • the lancet 14 is disposed on the central axis of the housing 12 with the rear end side of the lancet hub 50 inserted into the housing body 22 and the needle cap 18 inserted through the housing mouth 24. Are assembled. Further, when the lancet 14 is assembled to the housing 12, the compression coil spring 16 and the locking ring 72 are assembled and mounted in the housing 12.
  • the compression coil spring 16 is housed in the bottom portion of the housing body 22 and is disposed on the central axis, and its rear end is fitted and positioned on the spring seat 26 of the housing body 22, and the front thereof The end is fitted into the spring seat 54 of the lancet hub 50.
  • the compression coil spring 16 is interposed between the axially opposed surfaces of the bottom portion of the housing body 22 and the rear end portion of the lancet hub 50, and the lancet hub 50 is axially rearward (behind the housing body 22). ), The urging force accompanying the compression deformation is exerted in the direction of pushing the lancet hub 50 forward from the housing body 22.
  • the locking ring 72 is a resin molded product having a substantially circular ring shape, and is rotated by being inserted into the support cylinder portion 42 of the housing mouth body 24. It is installed as possible. Note that a pair of abutting leg portions 74 projecting forward are integrally formed on the locking ring 72, and the abutting leg portions 74 are connected adjacently on the support cylinder portion 42 on the circumference. It is inserted between the leg portions 40, 40. When the locking ring 72 rotates, the contact leg 74 abuts the connecting leg 40 in the circumferential direction, so that the locking ring 72 rotates in the circumferential direction on the support cylinder 42.
  • the allowable range is set smaller than 45 degrees.
  • an engaging portion 75 having an inner flange shape is integrally formed at the rear end portion of the locking ring 72, and a pair of first passage grooves 76 are formed on the inner peripheral surface of the engaging portion 75.
  • 76 and a pair of second passage grooves 78, 78 are formed so as to extend in parallel to the axial direction and are opposed to each other in the radial direction.
  • the first passage grooves 76 and 76 and the second passage grooves 78 and 78 both extend linearly over the entire axial length of the engaging portion 75.
  • the inner diameter of the engaging portion 75 is slightly larger than the outer diameter of the lancet hub 50 and the needle cap 18, and the locking ring 72 is extrapolated to the lancet hub 50 and the needle cap 18. It is installed.
  • the first passage groove 76 of the engagement portion 75 has a slightly larger cross-sectional shape than the reuse prevention protrusion 58 of the lancet hub 50, and the reuse prevention protrusion 58 is in the first passage groove 76. Can be moved in the axial direction.
  • the second passage groove 78 of the engagement portion 75 has a slightly larger cross-sectional shape than the engagement protrusion 60 of the lancet hub 50, and the engagement protrusion 60 passes through the second passage groove 78. It is possible to move in the axial direction.
  • the angle (intersection angle) formed between the radial direction in which the pair of first passage grooves 76 and 76 face each other and the radial direction in which the pair of second passage grooves 78 and 78 face each other is determined in the lancet hub 50.
  • the angle (intersection angle) formed by the radial direction in which the pair of reuse prevention protrusions 58 and 58 face each other and the radial direction in which the pair of locking protrusions 60 and 60 face each other is made different.
  • the radial direction in which the pair of first passage grooves 76 and 76 face each other and the radial direction in which the pair of second passage grooves 78 and 78 face each other intersect each other at approximately 60 degrees. Yes.
  • the pair of reuse preventing protrusions 58, 58 of the lancet hub 50 is engaged with the locking ring 72 while the lancet hub 50 is inserted into the locking ring 72.
  • the pair of locking projections 60, 60 of the lancet hub 50 are engaged with the locking ring 72 at a circumferential relative position that is aligned with the pair of first passage grooves 76, 76 and allowed to pass in the axial direction.
  • the pair of second passage grooves 78, 78 are in a misaligned state, and the locking projections 60, 60 are locked to the locking ring 72 to prevent the forward movement in the axial direction. Yes.
  • the lancet hub. 50 of the pair of reuse prevention protrusions 58, 58 are displaced with respect to the pair of first passage grooves 76, 76 of the locking ring 72, and the reuse prevention protrusions 58, 58 are in the locking ring 72.
  • the lancet hub 50 is prevented from moving rearward in the axial direction with respect to the locking ring 72.
  • the pair of reuse prevention protrusions 58 and 58 and the pair of locking protrusions 60 and 60 in the lancet hub 50 are slightly larger than the thickness dimension of the engaging part 75 in the locking ring 72 in the central axis direction. A distance away.
  • the reuse preventing projections 58, 58 are located on the front side in the axial direction of the engagement portion 75 and the locking projections 60, 60 are located on the rear side in the axial direction of the engagement portion 75.
  • the locking ring 72 inserted on the lancet hub 50 can be rotated with respect to the lancet hub 50.
  • one of the pair of reuse preventing protrusions 58, 58 and the pair of locking protrusions 60, 60 is selectively set to the first passage grooves 76, 76.
  • it can be positioned with respect to the second passage grooves 78 and 78 to allow passage displacement in the axial direction.
  • a pair of pressing pieces 80, 80 are integrally formed on the outer peripheral surface of the locking ring 72 so as to protrude on both sides in the radial direction.
  • the pressing piece 80 has an unequal right-angled triangular shape when viewed in the axial direction of the locking ring 72, and a surface corresponding to the oblique side thereof is a pressing inclined surface 82 inclined about the central axis of the locking ring 72.
  • these pressing pieces 80, 80 are located inward of the operation piece 20 of the housing body 22 in a state where the locking ring 72 is attached to the support cylinder portion 42. Are aligned so that
  • the puncture device 10 of this embodiment is configured by incorporating the lancet 14 into the housing 12 together with the compression coil spring 16 and the locking ring 72.
  • guide protrusions 56 and 56 protruding from the lancet hub 50 are inserted into guide rails 30 and 30 as guide mechanisms for guiding the lancet 14 in the protruding direction.
  • the movement of the lancet 14 in the axial direction is allowed in a state where rotation around the central axis, which is a circumferential displacement of the lancet 14 with respect to the housing 12, is prevented.
  • the cap locking projections 47, 47 of the housing mouth body 24 are respectively formed with the projection 68 formed on the needle cap 18.
  • the lancet 14 is attached to the housing 12 in a state where it is sandwiched and locked between the elastic claws 70 in the axial direction and the knob 66 of the needle cap 18 projects outward from the housing mouth 24 by a predetermined length. In contrast, it is positioned in the axial direction.
  • the lancet 14 compresses and deforms the compression coil spring 16 so that the locking projections 60, 60 of the lancet hub 50 are positioned further rearward than the locking ring 72.
  • the housing body 22 is pushed into the back.
  • the reuse prevention protrusions 58, 58 of the lancet hub 50 support the first passage grooves 76, 76 of the locking ring 72 and the housing mouth body 24. Between the first guide grooves 44 and 44 of the tube portion 42, the tube portion 42 is positioned so as to straddle.
  • an erroneous operation preventing mechanism is configured by being engaged in the circumferential direction so as not to be relatively rotatable.
  • the pressing inclined surface 82 of the pressing piece 80 of the locking ring 72 is opposed to the inner side of the operation piece 20. Then, by pushing the operation piece 20 into the housing 12 with a finger, one end in the circumferential direction of the operation piece 20 is pressed against the pressing inclined surface 82, and the component force exerted according to the inclination angle of the pressing inclined surface 82 Based on the action, the pressing force of the operation piece 20 is applied to the locking ring 72 by being converted into a rotational force.
  • the puncture device 10 is expected even if the operation piece 20 is accidentally pressed. Without a puncture operation.
  • the lancet hub 50 In the puncture device 10 in the puncture preparation state, the lancet hub 50 is moved forward in the axial direction by the urging force of the compression coil spring 16 because the axial positioning of the needle cap 18 with respect to the housing mouth 24 is released. Moved. Then, the locking projection 60 of the lancet hub 50 comes into contact with the rear end surface of the engagement portion 75 of the locking ring 72 and is prevented from being displaced forward in the axial direction. Due to the locking action of the locking protrusion 60 on the locking ring 72, the lancet 14 is held at the puncture preparation position.
  • the reuse preventing projections 58 and 58 of the lancet hub 50 are moved forward from the engagement position of the locking ring 72 to the first passage grooves 76 and 76. And only the first guide grooves 44, 44 of the housing mouth body 24 are engaged and positioned.
  • the reuse prevention protrusions 58 and 58 and the locking protrusions 60 and 60 of the lancet hub 50 are connected to the first passage grooves 76 and 76 and the second passage grooves 78 and 60 of the locking ring 72.
  • the locking ring 72 is allowed to rotate within the housing 12 by being disengaged in the axially forward and backward directions.
  • the lancet 14 moves vigorously forward in the axial direction in the housing 12 based on the biasing force of the compression coil spring 16.
  • the lancet 14 moves forward in the axial direction until the guide projections 56, 56 of the lancet 14 abut against the rear end surface of the locking ring 72, so that the distal end side of the lancet 14 guides the locking ring 72 from the guide projections 56, 56.
  • the puncture needle 52 at the tip of the lancet 14 protrudes outward from the tip opening of the housing mouth 24 by a predetermined length, and the puncture operation is realized.
  • the puncture operation in which the puncture needle 52 protrudes from the housing mouth 24 is instantaneously performed, and after the puncture, the lancet 14 is quickly pulled back into the housing 12 as shown in FIGS.
  • the needle tip of the puncture needle 52 is housed in the housing mouthpiece 24.
  • the relative positions in the circumferential direction of the reuse prevention protrusions 58, 58 and the locking protrusions 60, 60 in the lancet 14 are the first passage grooves 76, 76 and the second passage grooves 78, 78 in the locking ring 72. Therefore, the reuse can be prevented more reliably.
  • the locking projections 60, 60 of the lancet 14 can be aligned with the second passage grooves 78, 78 in the circumferential direction. Even if the stop protrusions 60, 60 can be moved deeper than the locking ring 72, the reuse prevention protrusions 58, 58 are already displaced with respect to the first passage grooves 76, 76 at that time. Yes. Therefore, as shown in FIGS.
  • the locking ring 72 is positioned in the depth direction of the housing mouth body 24, has a larger diameter than the support cylinder portion 42 of the housing mouth body 24, and is externally arranged on the support cylinder portion 42. Yes. Therefore, even when looking through the front opening of the housing mouth body 24, the locking ring 72 can hardly be visually recognized. Therefore, the lancet 14 is pushed through the small front opening of the housing mouth body 24 and simultaneously locked. It is substantially impossible to rotationally displace the ring 72.
  • the lancet 14 is prevented from rotating around the central axis with respect to the housing 12 by the engaging action of the guide protrusions 56, 56 to the guide rails 30, 30, the lancet 14 is rotated to rotate the locking ring 72. It is also impossible to exert a relative rotational action on the.
  • the locking ring 72 since the locking ring 72 is allowed to move inward of the housing main body 22, the locking ring 72 will be rotated by a wire inserted from the front opening of the housing mouth 24. Even so, it is even difficult to obtain an axial contact reaction force with respect to the locking ring 72 such as a wire rod.
  • the housing mouth body 24 of the present embodiment is provided with an inner peripheral convex portion 84 extending in the axial direction between the connecting leg portions 40 and 40 on the outer peripheral surface of the support cylinder portion 42.
  • a pair of the inner peripheral convex portions 84 are provided on both sides in the radial direction on the outer peripheral surface of the support cylinder portion 42.
  • each inner peripheral convex part 84 is separated from the end convex part 84a adjacent to the connecting leg part 40 in the circumferential direction from the end convex part 84a. It is comprised from the center convex part 84b located in the center of the circumferential direction between.
  • a concave portion 86 that is relatively concave with respect to both the convex portions 84a and 84b is formed between the circumferential direction of the end-side convex portion 84a and the central convex portion 84b.
  • the central protrusions 84b each have a substantially semicircular cross section, and the outer peripheral surface is curved.
  • the outer peripheral surface of the portion adjacent to the connecting leg portion 40 has a substantially flat surface shape, while the outer peripheral surface on the central convex portion 84b side has a curved surface shape.
  • the locking ring 72 of the present embodiment is provided with an outer peripheral convex portion 88 extending in the axial direction on the inner peripheral surface thereof.
  • the outer peripheral convex portion 88 is provided over substantially the entire axial length of the locking ring 72 at the substantially center in the circumferential direction of the contact leg portion 74 of the locking ring 72.
  • a pair of outer peripheral convex portions 88 are also provided opposite to each other in the radial direction.
  • the outer peripheral convex portion 88 also has a substantially semicircular cross section, and the inner peripheral surface has a curved surface shape.
  • the housing mouth body 24 and the locking ring 72 are assembled as shown in FIGS. 23 and 24 in the standard state. That is, the contact leg portions 74 and 74 of the locking ring 72 are inserted between the connecting leg portions 40 and 40 of the housing mouth body 24 in the circumferential direction, and the locking ring 72 is provided on the housing mouth body 24. It is inserted in the support cylinder part 42, and is supported so that rotation is possible.
  • the inner peripheral convex portions 84 and 84 and the outer peripheral convex portions 88 and 88 are formed at corresponding positions of the support cylinder portion 42 and the locking ring 72, and the inner peripheral convex portion 84, 84 and the outer peripheral side convex parts 88 and 88 are each formed in the circumferential direction at equal intervals.
  • the inner peripheral convex portion 84 (the end convex portion 84a and the central convex portion 84b) provided on the outer peripheral surface of the support cylinder portion 42 is the inner peripheral surface (outer peripheral side) of the contact leg portion 74 in the locking ring 72.
  • the portion where the convex portion 88 is not provided) abuts with substantially zero touch or faces with a slight separation distance.
  • the needle cap 18 provided at the tip of the lancet 14 is twisted into a puncture preparation state, thereby allowing the locking ring 72 to rotate with respect to the support cylinder portion 42.
  • the locking ring 72 is positioned in the circumferential direction with respect to the support cylinder 42 even in a state where the rotation of the locking ring 72 is allowed with respect to the support cylinder 42. That is, the outer peripheral convex portions 88 and 88 and the inner peripheral convex portions 84 and 84, particularly the central convex portions 84b and 84b, come into contact with each other in a state where the rotation of the locking ring 72 is allowed.
  • the free rotation of the locking ring 72 with respect to the support cylinder portion 42 is restricted. Furthermore, not only in the puncture preparation state, but also in the operation process of twisting the needle cap 18 provided at the tip of the lancet 14 to change from the standard state to the puncture preparation state, the force to twist the needle cap 18 is locked. By being transmitted to the ring 72, it is possible to prevent the locking ring 72 from rotating in the circumferential direction with respect to the support cylinder portion 42.
  • the inner peripheral side convex portions 84 and 84 and the outer peripheral side convex portions 88 and 88 provided between the support cylinder portion 42 (housing mouth body 24) and the locking ring 72 in the radial direction are:
  • the abutting portions that generate resistance are brought into contact with each other when the locking ring 72 is rotated with respect to the support cylinder portion 42. That is, by providing the contact portion, a resistance is exerted when the locking ring 72 is rotated in a state where the locking ring 72 is allowed to rotate, and the operation piece (operation member) 20 is operated. Since the rotation of the locking ring 72 that is not based on this is regulated, in this embodiment, the abutting portion constitutes a regulating means.
  • the operation piece 20 is pushed in and an external force is applied to the pressing inclined surface 82, so that the outer peripheral convex portions 88, 88 are centered on the inner peripheral convex portions 84, 84 as shown in FIG.
  • the locking ring 72 is allowed to rotate with respect to the support cylinder portion 42 over the convex portions 84b and 84b.
  • the overhanging of the central convex portions 84b, 84b by the outer peripheral side convex portions 88, 88 can be achieved by, for example, the contact leg portions 74, 74 of the locking ring 72 being bent and deformed to the outer peripheral side.
  • the axial displacement preventing force between the locking ring 72 and the locking projections 60, 60 of the lancet hub 50 is released, and the locking projections 60, 60 can be allowed to move forward in the axial direction.
  • the lancet 14 moves vigorously forward in the axial direction in the housing 12 based on the urging force of the compression coil spring 16, and the puncturing operation is realized.
  • the locking ring 72 when the needle cap 18 is pulled out to be in a puncture preparation state, the locking ring 72 is allowed to rotate. In FIG. 3, the rotation of the locking ring 72 is resisted, so that the rotation of the locking ring 72 that is not based on the operation of the operation piece 20 is restricted. Thereby, it can be avoided that the locking ring 72 rotates unintentionally with respect to the support cylinder portion 42 before the operation piece 20 is operated and the lancet 14 moves forward in the axial direction.
  • the restricting means for restricting the rotation of the locking ring 72 is constituted by the inner peripheral convex portions 84 and 84 and the outer peripheral convex portions 88 and 88. While restricted by the contact between the central convex portions 84b, 84b of the side convex portions 84, 84 and the outer peripheral convex portions 88, 88, the outer peripheral convex portions 88, 88 are allowed to pass over the central convex portions 84b, 84b.
  • the outer peripheral convex portions 88, 88 have passed over the central convex portions 84b, 84b, since no irregularities are provided, the outer peripheral convex portions 88, 88 are zero-touched on the outer peripheral surface of the support cylinder portion 42 or The locking ring 72 is rotated with respect to the support cylinder portion 42 in a state of facing slightly spaced apart. Therefore, after the outer peripheral convex portions 88 and 88 have passed over the central convex portions 84b and 84b, the locking ring 72 is smoothly rotated without the user feeling a sense of resistance such as a catching feeling. Can be operated.
  • FIGS. 1st Embodiment 1st Embodiment 1st Embodiment 1st Embodiment 2 a disposable puncture device employing another structure of a locking ring is illustrated as a second embodiment of the present invention in FIGS.
  • the puncture device 100 of the present embodiment is shown in an exploded view in FIG. 29, and a standard state provided as a product to the user in the market is shown in FIGS.
  • the pair of reuse prevention protrusions (58, 58) provided on the lancet hub 50 is not provided.
  • a pair of rotation prevention protrusions 102 and 102 are formed at substantially the same position as the pair of reuse prevention protrusions (58, 58) in the first embodiment.
  • the shape of the engaging portion 75 in the locking ring 72 is different from that of the first embodiment. Specifically, a pair of cutout portions 104, 104 extending substantially 1 ⁇ 4 circumference are formed in the inner flange-like engagement portion 75 so as to face each other in the radial direction. It should be noted that a pair of cutout portions 106, 106 partially cut away in thickness are formed on the rear end surface of the engagement portion 75 of the locking ring 72 so as to face each other in the radial direction.
  • a pressing inclined surface 82 is constituted by the step surface on the boundary line of the cutout portion 106 located at the rear end surface of the engaging portion 75 of the locking ring 72.
  • the cutout portions 106 and 106 are provided.
  • the component of the pushing force of the operating piece 20 provided on the housing 12 is exerted as a rotational force on the locking ring 72 by the pressing inclined surface 82 constituted by the step surface on the boundary line 106. It is.
  • the guide projections 56 and 56 of the lancet 14 are inserted into the guide rails 30 and 30 of the housing main body 22 to prevent rotation around the central axis. Therefore, in the standard state, the contact of the rotation prevention protrusions 102 and 102 with the notches 104 and 104 and the guide protrusions 56 and 56 are inserted into the guide rails 30 and 30 so that the rotation around the central axis is prevented. By the prevention mechanism, the rotation of the locking ring 72 is prevented by the engaging action to the housing 12 via the lancet 14.
  • the needle cap 18 is threaded from the lancet hub 50 and extracted from the housing mouth 24 as in the first embodiment.
  • the puncture preparation state as shown in FIGS.
  • the positioning of the lancet hub 50 by the needle cap 18 is released, and the lancet hub 50 is moved forward in the axial direction by the urging force of the compression coil spring 16. It is moved, and the locking projections 60, 60 of the lancet hub 50 are in contact with the rear end surface of the engaging portion 75 of the locking ring 72.
  • the locking protrusions 60, 60 of the lancet hub 50 that are in contact with the rear end surface of the engaging portion 75 of the locking ring 72 are When aligned with the notches 104, 104, the axial displacement blocking force exerted on the lancet hub 50 is released, and the locking projections 60, 60 connect the notches 104, 104 of the locking ring 72. Displacement is allowed axially forward through.
  • the lancet 14 moves vigorously forward in the axial direction in the housing 12 based on the urging force of the compression coil spring 16, and the puncture needle 52 as in the first embodiment.
  • the puncture operation is realized by momentarily protruding from the front opening of the housing 12.
  • a plurality of positioning ribs 108 are provided on the inner peripheral surface of the cylindrical portion of the housing body 22 so as to extend in the axial direction on the bottom side where the compression coil spring 16 is disposed. .
  • the plurality of positioning ribs 108 allow the compression coil spring 16 to be expanded and deformed in a stable position on the central axis in the housing body 22.
  • the locking ring 72 rotated by the operation piece 20 is formed as shown in FIGS.
  • the position after rotation as shown in FIG. Therefore, after the puncture, as shown in FIGS. 38 and 39, even if the lancet 14 is forced to be reused by pushing it into the back of the housing 12, the locking projections 60, The lancet 14 is again locked with respect to the locking ring 72 and the puncture as shown in FIGS. 30 to 32 is performed simply by moving 60 through the notches 104 and 104 of the locking ring 72 to the back of the housing body 22. It is virtually impossible to get ready.
  • the pushed lancet 14 is rotated. It cannot be locked to the locking ring 72. Therefore, in order to return to the puncture preparation state after the puncture, it is necessary to rotate and disengage the locking ring 72 at the same time while pushing the lancet 14 through the small front opening of the housing mouth 24. Use is becoming more difficult.
  • the same restricting means as described in the above [ii] column is employed, and the restricting means prevents inadvertent rotation of the locking ring 72 in the puncture preparation state.
  • the unintentional lancet 14 is prevented from being released and displaced in the projecting direction, and the locking ring 72 is forced beyond the restriction by the restricting means during the puncturing operation by the pushing operation of the operation piece 20.
  • the target puncture operation is realized.
  • FIGS. 40 and 41 members other than the housing mouth body 120 and the locking ring 122 in the present embodiment may have the same structure as in the first embodiment, and thus detailed description thereof is omitted. That is, in this embodiment, the housing mouth body 120 shown in FIGS. 40 and 41 and the locking ring 122 shown in FIGS. 42 and 43 are employed.
  • the housing mouth body 120 of the present embodiment is provided with an outer peripheral protrusion 124 that protrudes toward the outer peripheral side and extends in the peripheral direction between the connecting leg portions 40 and 40 on the outer peripheral surface of the support cylindrical portion 42.
  • the outer peripheral projections 124 are provided adjacent to one connecting leg 40 between the connecting legs 40 and 40 in the circumferential direction, and a pair is provided on both sides in the radial direction on the outer peripheral surface of the support cylinder 42. It has been.
  • the outer peripheral projection 124 has a predetermined axial dimension (vertical dimension in FIGS. 40 and 41) and 1 in the circumferential distance between the connecting legs 40 and 40. It is formed with a circumferential dimension of about / 3.
  • rear surface in the axial direction of these outer periphery protrusions 124, 124, it is an axial dimension toward the side which is not adjacent from the side adjacent to the connection leg part 40 in the circumferential direction.
  • substantially the entire rear surface in the axial direction of the outer peripheral projections 124 and 124 is the inclined surfaces 126 and 126.
  • the front surfaces in the axial direction of the contact legs 74, 74 are provided with inclined surfaces 128, 128 whose axial dimension decreases from one to the other in the circumferential direction.
  • substantially the entire axial front surfaces of the contact legs 74, 74 are inclined surfaces 128, 128.
  • the housing mouth body 120 and the locking ring 122 having such a structure are assembled as shown in FIG. 44 in the standard state. That is, the contact leg portions 74 and 74 extending from the locking ring 122 are inserted between the connecting leg portions 40 and 40 of the housing mouth body 120, and the locking ring 122 is extrapolated to the support cylinder portion 42.
  • the inclined surfaces 126 and 126 provided on the housing mouth 120 and the inclined surfaces 128 and 128 provided on the locking ring 122 are formed with substantially the same inclination angle. In the standard state, these inclined surfaces 126 are provided. 128 are in contact with each other or opposed in the axial direction with a slight separation distance. Therefore, in the present embodiment, the axially opposed surfaces that oppose the axially front surfaces (inclined surfaces 128, 128) of the locking ring 122 are constituted by the inclined surfaces 126, 126 provided on the housing mouth body 120. .
  • the needle cap (18) provided at the tip of the lancet (14) is twisted into a puncture preparation state, but in this embodiment, the puncture preparation state is established and the support tube portion 42 is made. Even when the locking ring 122 is allowed to rotate, the inclined surfaces 126 and 126 of the outer peripheral projections 124 and 124 provided on the housing mouth 120 and the inclined surface provided on the locking ring 122. The free rotation of the locking ring 122 with respect to the support cylinder portion 42 is restricted by the contact between 128 and 128.
  • the abutting portions that abut against the inclined surfaces 128 and 128 that are the front surfaces in the axial direction of the locking ring 122 to generate resistance are the housing openings.
  • the outer peripheral projections 124 and 124 provided on the body 120 are constituted by inclined surfaces 126 and 126.
  • the contact portion is provided on the axially opposed surfaces (inclined surfaces 126 and 126) that oppose the inclined surfaces 128 and 128 that are the front surfaces in the axial direction of the locking ring 122.
  • the contact means constitutes a restricting means.
  • the operating piece (20) is pushed in and an external force is applied to the pressing inclined surface 82, whereby the inclined surfaces 128, 128 provided on the locking ring 122 are moved into the housing opening as shown in FIG.
  • the rotation of the locking ring 122 with respect to the support tube portion 42 is allowed.
  • the climbing over the inclined surfaces 126, 126 by the inclined surfaces 128, 128 causes the inclined surfaces 126, 126 and the inclined surfaces 128, 128 to contact each other as the operating piece 20 is pushed in, and the component force of the contact force is related.
  • the locking ring 122 and the lancet (14) are moved in the axially rearward direction against the urging force of the compression coil spring (16) by acting as a pushing force in the axially backward direction of the retaining ring 122. .
  • the inclined surfaces 128, 128 get over the inclined surfaces 126, 126 to allow the locking ring 122 to rotate with respect to the support cylinder 42, and to lock the locking ring 122 and the lancet hub (50).
  • the axial displacement prevention force with respect to the portion (60, 60) is released, and the axial displacement of the locking projection (60, 60) can be allowed.
  • the lancet (14) moves vigorously forward in the axial direction within the housing (12) based on the urging force of the compression coil spring (16), thereby realizing the puncturing operation.
  • the locking ring 122 is intended for the support cylinder portion 42 before the operation piece (20) is operated, as in the first embodiment. It can be avoided that the lancet (14) moves forward in the axial direction without rotating. In particular, in the present embodiment, when the locking ring 122 is rotated, the locking ring 122 and the lancet (14) are merely moved rearward in the axial direction and are not displaced in the direction perpendicular to the axis. The shake of the lancet (14) can be effectively reduced.
  • FIGS. 46 and 47 members other than the locking ring 130 and the lancet 132 in the present embodiment may have the same structure as in the first embodiment, and thus detailed description thereof is omitted. That is, in this embodiment, the locking ring 130 shown in FIGS. 46 and 47 and the lancet 132 shown in FIGS. 48 and 49 are employed.
  • the locking ring 130 in the present embodiment is provided with an axial convex portion 136 that protrudes rearward in the axial direction on the axial rear end surface 135 of the engaging portion 134 that is an axially rear surface.
  • the pair of axial convex portions 136, 136 are perpendicular to each other at positions substantially adjacent to the second passage grooves 78, 78 in the radial direction. It extends in the direction.
  • the locking projections 138, 138 are formed with a stepped shape. That is, the locking protrusions 138, 138 are located on the inner peripheral side and have a wide circumferential portion 140, 140 having a large circumferential dimension, and the narrow portions 142, 142 projecting from the circumferential center of the wide width portion 140 to the outer peripheral side. It is composed of
  • the locking ring 130, the lancet 132, and the housing mouth body 24 are assembled. That is, in the standard state, the locking protrusions 138 and 138 of the lancet 132, in particular, the narrow portions 142 and 142 in the axial direction contact the engaging portion 134 of the locking ring 130 in the axial direction.
  • the narrow protrusions 142 and 142 of the locking projections 138 and 138 of the lancet 132 are in contact with the axial projections 136 and 136 in the circumferential direction or opposed in the circumferential direction with a slight separation distance.
  • the needle cap (18) provided at the tip of the lancet 132 is twisted into a puncture preparation state.
  • the axial protrusions 136, 136 provided on the locking ring 130 and the engagement provided on the lancet 132 Even in a state where the rotation of the locking ring 130 is allowed with respect to the support cylinder portion 42, the axial protrusions 136, 136 provided on the locking ring 130 and the engagement provided on the lancet 132.
  • the stop protrusions 138, 138, in particular, the narrow portions 142, 142 abut against each other, thereby resisting the rotation of the locking ring 130 relative to the support cylinder 42, and the locking ring 130 can be freely rotated. It is regulated.
  • the abutting portions that generate a resistance by abutting against the locking protrusions 138 and 138 of the lancet 132 are located behind the locking ring 130 in the axial direction. It is comprised by the axial direction convex parts 136 and 136 provided in the direction (axial direction rear end surface 135). Then, under the state where the rotation of the locking ring 130 is allowed by the contact portion, a resistance is exerted when the locking ring 130 is rotated, and based on the operation of the operation piece (operation member) (20). Since the rotation of the non-engagement locking ring 130 is restricted, in this embodiment, the contact means constitutes a restricting means.
  • the overhanging of the axial projections 136, 136 by the locking projections 138, 138 causes the locking projections 138, 138 and the axial projections 136, 136 to contact each other as the operating piece 20 is pushed in,
  • the abutting force is applied as a pushing force of the lancet 132 in the axially rearward direction, and the lancet 132 is moved in the axially backward direction against the urging force of the compression coil spring (16).
  • the locking protrusions 138 and 138 get over the axial projections 136 and 136, the rotation of the locking ring 130 with respect to the support cylinder 42 is allowed, and the locking ring 130 and the lancet 132 are locked.
  • the axial displacement prevention force with the protrusions 138 and 138 is released, and the axial displacement of the locking protrusions 138 and 138 can be allowed.
  • the lancet 132 moves vigorously forward in the axial direction in the housing (12) based on the urging force of the compression coil spring (16), thereby realizing the puncturing operation.
  • the locking ring 122 is intended for the support cylinder portion 42 before the operation piece (20) is operated, as in the first embodiment. It can be avoided that the lancet (14) moves forward in the axial direction without rotating. Also in this embodiment, when the locking ring 130 is rotated, the lancet 132 only moves rearward in the axial direction and does not deviate in the direction perpendicular to the axial direction. It can be effectively reduced.
  • each of the disposable puncture devices 10 and 100 of the above-described embodiment only one compression coil spring 16 is provided in the housing 12 that exerts both a projecting output and a pulling force on the lancets 14 and 132.
  • a spring member that exerts an urging force in the protruding direction on the lancets 14 and 132 and a spring member that exerts an urging force in the retracting direction may be provided separately.
  • a blade or the like can be used instead of the puncture needle 52 as illustrated.
  • the outer peripheral side convex portions 84, 84 are provided on the outer peripheral surface of the support cylinder portion 42 of the housing mouth body 24, and the outer peripheral side convex portions 88, 84 are provided on the inner peripheral surface of the locking ring 72.
  • the contact portion is configured by the inner peripheral side convex portions 84 and 84 and the outer peripheral side convex portions 88 and 88, the present invention is not limited to such a mode.
  • a convex portion is provided on one of the outer peripheral surface of the support cylinder portion 42 and the inner peripheral surface of the locking ring 72, and a concave portion is provided on the other side.
  • a restricting means for restricting the rotation of the locking ring 72 not based on the operation of the (operation piece 20) may be configured.
  • the end convex portions 84a and 84a in the inner peripheral convex portions 84 and 84 are not essential. That is, the locking ring 72 only needs to be restricted from rotating in the direction in which the locking protrusion 60 is unlocked, and the rotation in the opposite direction is not necessarily restricted. However, the rotation of the locking ring 72 in the opposite direction can be restricted by the contact leg portion 74 coming into contact with the connecting leg portion 40.
  • the contact portions are opposed to each other in the radial direction. Although provided, it may be provided only at one place on the circumference, or may be provided at three or more places. In the case where a plurality of such contact portions are provided, it is preferable that they are provided at equal intervals in the circumferential direction, but they are not necessarily provided at equal intervals.
  • the inner peripheral surface, the axial front surface (inclined surface 128), and the axial rear surface (axial rear end surface 135) of the locking rings 72, 122, and 130 respectively.
  • two or three of them may be used in combination with each other, for example, against the inner peripheral surface of the locking rings 72, 122, and 130 and the front surface in the axial direction.
  • a contact portion may be provided, or a contact portion may be provided on all of the inner peripheral surface, the axial front surface, and the axial rear surface of the locking rings 72, 122, and 130.
  • the restricting means for restricting the rotation of the locking rings 72, 122, and 130 not based on the operation of the operation member (operation piece 20) has the contact portion (inner circumference). Although it was comprised by the side convex part 84, the outer peripheral side convex part 88, the inclined surface 126, and the axial direction convex part 136), it is not limited to this aspect. That is, an urging member that urges the locking rings 72, 122, and 130 in the direction opposite to the rotation direction is provided, and the urging force of the urging member resists the rotation of the locking rings 72, 122, and 130.
  • a restricting means for restricting the rotation of the locking rings 72, 122, and 130 not based on the operation of the operation member may be provided.
  • an operating force exceeding the urging force is exerted on the operating member, so that the locking rings 72, 122, and 130 are rotated while swinging the urging force by the urging member.
  • Such an urging member may be provided on any of the locking rings 72, 122, 130, the lancets 14, 132, the housing mouths 24, 120, the housing body 22, and the like.
  • an erroneous operation prevention mechanism (the first passage groove 76 of the locking ring 72 and the first guide groove 44 of the housing mouth body 24 and the reuse prevention protrusion 58 of the lancet hub 50). ) Prevents the locking ring 72 from rotating in the standard state or when the needle cap 18 is threaded, but is provided with restricting means (inner peripheral convex portion provided separately from the erroneous operation preventing mechanism). 84, 84 and the outer peripheral projections 88, 88) can also exert the effect of preventing the rotation of the locking ring 72 in the standard state or when the needle cap 18 is threaded.
  • the effect of preventing the rotation of the locking rings 72 and 122 in the standard state and when the needle cap 18 is threaded is exhibited by the restricting means provided separately from the erroneous operation preventing mechanism.
  • the restricting means according to the present invention is only required to exhibit the effect of preventing the rotation of the locking ring at least in the puncture preparation state (that is, in a state where the rotation of the locking ring 72 is allowed). Further, it is not necessary to exert the rotation preventing effect when the needle cap 18 is threaded.

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Abstract

L'invention concerne un instrument de ponction à usage unique ayant une structure nouvelle qui permet à une lancette d'être maintenue dans une position prête pour la ponction et d'effectuer une opération de ponction avec certitude et avec une opération stable. Dans un instrument de ponction à usage unique (10), une bague de verrouillage (72) est disposée à l'intérieur d'un boîtier (12), une lancette (14) est pourvue d'une saillie de verrouillage (60) et la lancette (14) est maintenue dans une position prête pour la ponction par l'action de verrouillage de la saillie de verrouillage (60) sur la bague de verrouillage (72). Un élément d'actionnement (20) présent permet de réaliser une opération de ponction en amenant la bague de verrouillage (72) à tourner de telle sorte que le verrouillage de la saillie de verrouillage (60) sur la bague de verrouillage (72) est libéré et que la lancette (14) est déplacée dans une direction de saillie. Des moyens de régulation (84, 88) sont en outre présents, lesquels régulent la rotation de la bague de verrouillage (72) indépendamment du fonctionnement de l'élément d'actionnement (20), une telle régulation étant réalisée en exerçant une résistance contre la rotation de la bague de verrouillage (72) dans un état dans lequel la rotation de la bague de verrouillage (72) est autorisée.
PCT/JP2017/044339 2016-12-27 2017-12-11 Instrument de ponction à usage unique WO2018123535A1 (fr)

Priority Applications (1)

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JP2018558988A JP7001065B2 (ja) 2016-12-27 2017-12-11 ディスポーザブル型穿刺器具

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JP2016-254122 2016-12-27

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2024028467A (ja) * 2019-12-26 2024-03-04 ニプロ株式会社 穿刺器具

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0716218A (ja) * 1993-06-21 1995-01-20 Boehringer Mannheim Gmbh 診断目的の血液採取用血液ランセットデバイス
JP2012005518A (ja) * 2010-06-22 2012-01-12 Nipro Corp ディスポーザブル型穿刺器具

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0716218A (ja) * 1993-06-21 1995-01-20 Boehringer Mannheim Gmbh 診断目的の血液採取用血液ランセットデバイス
JP2012005518A (ja) * 2010-06-22 2012-01-12 Nipro Corp ディスポーザブル型穿刺器具

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2024028467A (ja) * 2019-12-26 2024-03-04 ニプロ株式会社 穿刺器具
JP7666665B2 (ja) 2019-12-26 2025-04-22 ニプロ株式会社 穿刺器具

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JP7001065B2 (ja) 2022-01-19

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