CN115708909A - Resilience formula safety syringe needle - Google Patents

Abstract

The invention discloses a rebound type safety injection needle, which comprises a shell structure, and a rebound pressing structure, a transmission structure, a stop block, and an inner cylinder are sequentially arranged in the inner cavity of the shell structure from top to bottom; the transmission structure An auxiliary block is installed inside, and the lower end of the auxiliary block penetrates the lower end surface of the transmission structure and cooperates with the stop block; the lower end of the stop block is fixedly installed with a needle holder, and the lower end of the needle holder is inserted and fixedly installed with an injection needle Needle; the lower end of the inner cylinder is provided with a perforation, the perforation is connected with the inner cavity of the inner cylinder, and the needle seat is interspersed with the perforation; the lower end of the stop block and the bottom surface of the inner cylinder are jointly arranged There is a rebound spring, and the rebound spring is sleeved on the needle seat; the upper shell structure of the stop block is in contact with each other. The rebound type safety injection needle of the present invention can effectively maintain the safety of medical personnel, improve the accuracy and reliability of injection, and reduce the discomfort when the needle of the injection needle is separated from the patient.

Description

A rebound safety injection needle

technical field

The invention relates to the technical field of medical devices, in particular to a rebound safety injection needle.

Background technique

An injection needle is a medical device used to inject injection fluid into a patient's body. After the injection needle is used, the medical staff will put on the needle cover to isolate and protect the used needle. However, in the process of putting the needle cover on, it is easy for the medical staff to be injured by the used needle due to operational errors, resulting in The problem of blood infection occurs, and the needle cover on the sleeve may also fall off due to external force, resulting in the failure of the isolation protection for the needle after use, thus creating a safety risk. Therefore, we propose a rebound type safety injection needle.

Contents of the invention

The main purpose of the present invention is to provide a rebound safety injection needle, which can effectively solve the problems in the background technology.

In order to achieve the above object, the technical scheme that the present invention takes is:

A rebound-type safety injection needle, comprising a shell structure, the inner cavity of the shell structure is sequentially provided with a rebound pressing structure, a transmission structure, a stop block, and an inner cylinder; the transmission structure is equipped with an auxiliary block, the lower end of the auxiliary block penetrates the lower end surface of the transmission structure and cooperates with the stop block; the lower end of the stop block is fixedly installed with a needle seat, and the lower end of the needle seat is inserted and fixedly installed with an injection needle; The lower end of the inner cylinder is provided with a perforation, and the perforation communicates with the inner cavity of the inner cylinder, and the needle seat is interspersed with the perforation; the lower end of the stop block and the bottom surface of the inner cylinder are jointly provided with a rebound spring , the rebound spring is sleeved on the needle seat; the upper end of the stop block is in contact with the shell structure, and when the lower end of the stop block is in contact with the shell structure, the rebound spring is in a state of compressing and accumulating elastic potential energy.

Preferably, the shell structure includes an outer cylinder, the lower end of the outer cylinder is fixedly installed with an installation pipe, and the inner cavity of the installation pipe communicates with the inner cavity of the outer cylinder; the stop block is formed by the inner wall of the installation pipe Sliding seal; the inner cylinder is fixedly installed on the inner cylindrical surface of the installation tube, and the bottom surface of the outer cylinder is fixedly equipped with a rebound trigger frame, and the rebound trigger frame is provided with multiple and the center line of the outer cylinder is The center of the array is distributed in a circular array; the rebound trigger frame is composed of a rebound trigger block and connecting arc bars.

Preferably, the longitudinal section shape of the rebound trigger block is triangular, and the connecting arc bar is made of elastic material; one end of the connecting arc bar is fixedly connected to the bottom surface of the outer cylinder, and the other end is connected to the rebound trigger block Fixed connection; the end of the rebound trigger block connected to the connecting arc bar is in contact with the upper end of the stop block, and when the rebound trigger block is in contact with the upper end of the stop block, the rebound spring is in a compressed and accumulated elasticity Potential state.

Preferably, the rebound pressing structure includes an inner tube, the inner tube is located in the outer cylinder, the lower end of the inner tube is fixedly installed with a connector, and the inner cylindrical surface of the inner tube is fixedly installed with a stop top piece , the bottom-stop top piece is inclined upward; a guard plate is fixedly installed on the upper side of the inner cylindrical surface of the inner tube, and the guard plate is above the bottom-stop top piece.

Preferably, the transmission structure includes a transmission block, the upper end of the transmission block is provided with an engaging cavity, the lower end of the transmission block is provided with an installation cavity, and the lower end of the transmission block is fixedly installed with a rebound drive block; The installation cavity communicates with the locking cavity, and runs through the lower end surface of the rebound driving block; the cavity wall of the installation cavity is provided with a locking groove; the outer surface of the auxiliary block is fixedly installed with a locking ring, the The auxiliary block and the snap ring are matched with the installation cavity and the snap groove respectively.

Preferably, the inner tube and the connecting head are integrally made, and the inner cavity of the inner tube runs through the lower end surface of the connecting head; the connecting head is snapped and installed in the snapping cavity; the outer surface of the transmission block and the The inner surface of the rebound trigger block forms an inclined plane transmission. When the drive block moves down, the rebound trigger block swings toward the bottom surface of the outer cylinder to bend the connecting arc. When the rebound trigger block swings until it is out of contact with the stop block , the rebound spring rebounds and resets, so that the auxiliary block, the stop block, the needle seat and the needle head of the injection needle move toward the guard plate in the inner cavity of the inner tube, and the needle head of the injection needle is received into the shell structure.

Preferably, the upper end surface of the stop top sheet is in contact with the lower end surface of the stop block, and when the upper end surface of the stop top sheet is in contact with the lower end surface of the stop block, the needle of the injection needle is kept in the housing structure.

Compared with the prior art, the present invention has the following beneficial effects:

1. Effectively maintain the safety of medical staff: by setting a needle cover that can be set on the installation tube, the needle cover can cover the needle of the injection needle, so that the needle of the injection needle and the medical staff can be isolated before use, protecting the medical staff The role of personnel; by setting the rebound spring, after the rebound trigger block is out of contact with the stop block, the rebound spring is stretched and reset, and the auxiliary block, stop block and needle seat are pushed into the inner tube, and the injection needle The needle is retracted into the shell structure, and the injection needle received in the shell structure can no longer protrude from the shell structure through the cooperation of the stop block and the bottom stop top plate, so as to realize the continuous isolation protection of the injection needle after injection , so that after the injection, the medical staff can be prevented from being injured by the injection needle after the injection, and it can completely prevent the medical staff from contacting the injection needle after the injection and causing blood infection and other problems, and play a role in protecting the medical staff.

2. Improve the accuracy and reliability of injection: the shell structure, rebound pressing structure, transmission structure, inner cylinder, needle seat, stop block, and auxiliary block are all made of colorless and transparent materials, and the outer cylinder is equipped with an injection indicator The scale line of the liquid level height, during the injection operation, the medical staff can clearly observe the liquid level status, in addition, the medical staff can also timely control the patient's reaction according to the liquid level, which can improve the accuracy and reliability of the injection .

3. Reduce discomfort: The needle of the injection needle is bounced into the shell structure through the rebound spring, so that the needle of the injection needle is automatically out of contact with the patient, reducing the manual needle pulling action after injection, and the separation of the needle of the injection needle from the patient is completed instantly , can reduce the pain caused by pulling out the needle, and can reduce the discomfort.

Description of drawings

Fig. 1 is a structural sectional view of the rebound spring when it is in a compressed state;

Figure 2 is a sectional view of the internal structure;

Fig. 3 is a sectional view of the shell structure;

Fig. 4 is a structural schematic diagram of place A;

Fig. 5 is a sectional view of the rebound pressing structure;

Fig. 6 is a sectional view of the transmission structure;

Fig. 7 is a sectional view of the auxiliary block;

Schematic diagram of the structure of the lower block as shown in Fig. 8;

Fig. 9 is a structural cross-sectional view of the rebound spring when it is stretched and reset;

Fig. 10 is a schematic diagram of the overall structure of a rebound safety injection needle of the present invention.

In the figure: 1. Shell structure; 2. Rebound pressing structure; 3. Transmission structure; 4. Inner cylinder; 41. Perforation; 5. Needle seat; No. 2 liquid guide hole; 62, liquid guide tank; 7, auxiliary block; 8, rebound spring; 9, injection needle needle; 10, needle cover; 11, outer cylinder; 12, installation tube; 13, rebound trigger frame ; 131, rebound trigger block; 132, connecting arc bar; 21, inner tube; 22, connecting head; 23, stop top piece; 24, guard plate; 31, transmission block; Cavity; 331, engaging groove; 332, rebound driving block; 71, engaging ring.

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "another end" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, use a specific Azimuth configuration and operation, therefore, should not be construed as limiting the invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and should not be understood as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise specified and limited, the terms "installed", "set with", "connected", etc. should be understood in a broad sense, such as "connected", which may be a fixed connection , can also be detachably connected, or integrally connected; can be mechanically connected, can also be electrically connected; can be directly connected, can also be indirectly connected through an intermediary, and can be internal communication between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

As shown in Figure 1-9, a rebound type safety injection needle includes a shell structure 1, and the inner cavity of the shell structure 1 is sequentially provided with a rebound pressing structure 2, a transmission structure 3, a stop block 6, Inner cylinder 4; auxiliary block 7 is installed in the transmission structure 3, the lower end of the auxiliary block 7 runs through the lower end surface of the transmission structure 3 and cooperates with the stop block 6; The lower end of the inner cylinder 4 is inserted and fixedly installed with an injection needle 9; the lower end of the inner cylinder 4 is provided with a perforation 41, the perforation 41 communicates with the inner cavity of the inner cylinder 4, and the needle seat 5 is interspersed with the perforation 41; the lower end of the stop block 6 and the inner A rebound spring 8 is provided between the bottom surfaces of the barrel 4, and the rebound spring 8 is sleeved on the needle seat 5; 1. When in contact with each other, the rebound spring 8 is in a state of compressing and accumulating elastic potential energy.

It should be noted that the shell structure 1, the rebound pressing structure 2, the transmission structure 3, the inner cylinder 4, the needle seat 5, the stop block 6, and the auxiliary block 7 are all made of colorless and transparent materials. During the injection process, The medical staff can clearly observe the liquid level. In addition, the medical staff can also timely control the patient's response according to the liquid level, improving the accuracy and reliability of the injection.

As a further description of the above technical solution, the shell structure 1 includes an outer cylinder 11; the outer cylinder 11 is used to load the injection liquid, and the outer cylinder 11 is provided with a scale line indicating the liquid level of the injection liquid. When the injection operation is not performed, the injection liquid Located between the bottom surface of the outer cylinder 11 and the transmission structure 3; the lower end of the outer cylinder 11 is fixedly installed with an installation pipe 12, and the inner cavity of the installation pipe 12 communicates with the inner cavity of the outer cylinder 11; the stop block 6 and the installation pipe 12 The inner wall constitutes a sliding seal, and the stop block 6 is plugged and fitted with the upper end of the inner cylinder 4; the inner cylinder 4 is fixedly installed on the inner cylindrical surface of the installation pipe 12, and the end surface of the inner cylinder 4 is flush with the end surface of the installation pipe 12; the outer cylinder The bottom surface of the barrel of 11 is fixedly equipped with a rebound trigger frame 13, and the rebound trigger frame 13 is provided with multiple and distributed in a circular array with the center line of the outer cylinder 11 as the center of the array. Gap; In a specific embodiment, there are at least two rebound trigger racks 13, and when there are two rebound trigger racks 13, the two rebound trigger racks 13 are arranged in 180-degree rotational symmetry; the rebound trigger racks 13 is made up of rebound trigger block 131 and connecting arc bar 132. The longitudinal section shape of the rebound trigger block 131 is triangular, the connecting arc bar 132 is made of elastic material, and the connecting arc bar 132 can be bent and deformed; one end of the connecting arc bar 132 is fixedly connected with the bottom surface of the outer cylinder 11, and the other end is connected with the back The elastic trigger block 131 is fixedly connected; the end of the rebound trigger block 131 connected with the connecting arc bar 132 contacts and cooperates with the upper end of the stop block 6, and when the rebound trigger block 131 contacts and cooperates with the upper end of the stop block 6, The rebound spring 8 is in a state of compressing and accumulating elastic potential energy.

It should be noted that the bottom stop block 6 is a T-shaped cylindrical structure, the upper surface of the bottom stop block 6 is a downwardly concave curved surface, the bottom stop block 6 and the needle seat 5 are integrally made, and the bottom stop block 6 is provided with a There is a No. 2 fluid guide hole 61 penetrating up and down, and a No. 1 fluid guide hole 51 penetrating up and down is opened on the needle base 5. A fluid guide groove 62 is opened on the upper end of the stop block 6, and the lowest point of the fluid guide groove 62 is located at Below the bottom surface of the outer cylinder 11, the fluid guide groove 62, the second fluid guide hole 61, the first fluid guide hole 51 and the inner cavity of the injection needle 9 are sequentially connected, and the injection liquid located in the outer cylinder 11 can pass through the fluid guide groove 62 , No. 2 liquid guiding hole 61 and No. 1 liquid guiding hole 51 enter into the needle head 9 of the injection needle, and the injection operation of the injection liquid can be performed when the springback pressing structure 2 is pressed down.

As a further description of the above technical solution, the rebound pressing structure 2 includes an inner tube 21, the inner tube 21 is located in the outer cylinder 11, the lower end of the inner tube 21 is fixedly installed with a connector 22, and the inner cylindrical surface of the inner tube 21 is fixedly installed with a Stop the top sheet 23, the bottom top sheet 23 is inclined upwards, the bottom top sheet 23 is an elastic sheet, the bottom top sheet 23 is provided with a plurality and is distributed in an annular array with the center line of the inner tube 21 as the array center; In the specific embodiment, there are at least two bottom-stop top sheets 23, and when two bottom-stop top sheets 23 are provided, the two bottom-stop top sheets 23 are arranged at intervals; the upper side of the inner cylindrical surface of the inner tube 21 is fixed A guard plate 24 is installed, and the guard plate 24 is above the bottom top sheet 23 . The upper end surface of the stop top piece 23 is in contact with the lower end surface of the stop block 6. When the upper end surface of the stop top piece 23 is in contact with the lower end surface of the stop block 6, the needle head 9 of the injection needle is kept in the shell structure 1. .

The transmission structure 3 includes a transmission block 31, the transmission block 31 is located in the outer cylinder 11, and the transmission block 31 forms a sliding seal with the inner wall of the outer cylinder 11, so that the transmission block 31 can slide in the outer cylinder 11, and during the sliding process of the transmission block 31, The injection liquid in the outer cylinder 11 will not leak to the top of the transmission block 31; the upper end of the transmission block 31 is provided with an engaging chamber 32, the lower end of the transmission block 31 is provided with an installation chamber 33, and the lower end of the transmission block 31 is fixedly installed with a return Elastic driving block 332; installation cavity 33 communicates with engaging cavity 32, and runs through the lower end surface of rebound driving block 332; cavity wall of mounting cavity 33 is provided with engaging groove 331; the outer surface of auxiliary block 7 is fixedly installed There is a snap ring 71, and the auxiliary block 7 and the snap ring 71 are matched with the installation cavity 33 and the snap groove 331 respectively; , A seal is formed between the auxiliary block 7 and the transmission structure 3 .

It should be noted that the inner tube 21 and the connecting head 22 are integrally made, and the inner cavity of the inner tube 21 runs through the lower end surface of the connecting head 22 and communicates with the engaging cavity 32; the connecting head 22 is engaged and installed in the engaging cavity 32; when the snap ring 71 disengages from the snap groove 331, the auxiliary block 7 will enter the inner tube 21.

It should be noted that the outer surface of the transmission block 31 and the inner surface of the rebound trigger block 131 form an inclined plane transmission. When the transmission block 31 moves down, the rebound trigger block 131 swings toward the bottom surface of the outer cylinder 11, so that the connecting arc bar 132 is bent, and when the rebound trigger block 131 swings until it is out of contact with the stop block 6, the rebound spring 8 rebounds and resets, so that the auxiliary block 7, the stop block 6, the needle seat 5 and the needle head 9 of the injection needle are in the inner tube 21 The inner cavity moves toward the guard plate 24, and the injection needle needle 9 is received into the shell structure 1, so as to realize protection after injection.

It should be noted that the present invention also includes a needle cover 10, which is sleeved on the installation tube 12 before the injection needle 9 is injected, and covers the injection needle 9 to achieve protection before injection.

It should be noted that the present invention is a rebound type safety injection needle, which has two initial transition states during use; the first initial state is: the stop block 6 is located in the installation tube 12, and is in contact with the rebound trigger block The end face of 131 is in contact, the rebound spring 8 is compressed, the needle 9 of the injection needle protrudes to the outside of the shell structure 1, the transmission structure 3 is close to the bottom surface of the outer cylinder 11, and the outer cylinder 11 is not filled with injection liquid; the second initial state It is: different from the first initial state, the transmission structure 3 is far away from the bottom surface of the outer cylinder 11, and the outer cylinder 11 is filled with injection liquid.

When using from the first initial state, first remove the needle cover, then put the injection needle 9 into the injection solution bottle, pull up the rebound pressing structure 2, make the outer cylinder 11 form a negative pressure, and draw the injection solution into the into the outer cylinder 11, and then perform the injection operation; when the injection operation is performed, the needle 9 of the injection needle penetrates into the patient's body, and then presses down on the rebound structure 2 to inject the injection into the patient's body, and continues to press down The rebound pressing structure 2, before the transmission block 31 contacts the rebound trigger block 131, the auxiliary block 7 contacts the stop block 6, and when the transmission block 31 contacts the rebound trigger block 131, the rebound trigger frame 13 begins to bear force, As the rebound pressing structure 2 continues to be pressed down, the connecting arc bar 132 is deformed, and the rebound trigger block 131 is everted. With the further pressing down of the rebound pressing structure 2, the engaging ring 71 gradually moves up to engage with the engaging groove 331 Detachment, before the rebound trigger block 131 is turned outward and the stop block 6 is disengaged, the snap ring 71 is separated from the engagement groove 331, and at the moment when the rebound trigger block 131 is separated from the stop block 6, the rebound spring 8 resets and elongates To the original length, push the auxiliary block 7, the stop block 6 and the needle seat 5 into the inner tube 21, put the injection needle needle 9 into the shell structure 1, and move the stop block 6 up to the stop top piece 23, to prevent the stop block 6 from moving too long when the rebound spring 8 stops lifting the stop block 6, so that the injection needle needle 9 re-extends to the outside of the shell structure 1.

When using from the second initial state, the needle cover can be directly removed for injection operation, and the injection operation process in the second initial state is basically the same as that in the first initial state.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments. What are described in the above-mentioned embodiments and the description only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have Variations and improvements are possible, which fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (7)

1. A resilient safety injection needle comprising a housing structure (1), characterized in that: a rebound pressing structure (2), a transmission structure (3), a stop block (6) and an inner barrel (4) are sequentially arranged in the inner cavity of the shell structure (1) from top to bottom; an auxiliary block (7) is arranged in the transmission structure (3), and the lower end of the auxiliary block (7) penetrates through the lower end face of the transmission structure (3) and is matched with the lower stop block (6); a needle seat (5) is fixedly arranged at the lower end of the lower stopping block (6), and an injection needle head (9) is fixedly arranged at the lower end of the needle seat (5) in an inserting manner; the lower end of the inner cylinder (4) is provided with a through hole (41), the through hole (41) is communicated with the inner cavity of the inner cylinder (4), and the needle seat (5) is in inserting fit with the through hole (41); a rebound spring (8) is arranged between the lower end of the lower stopping block (6) and the bottom surface of the inner cylinder (4) together, and the rebound spring (8) is sleeved on the needle seat (5); the upper end shell structure (1) of the stop block (6) is in contact fit, and when the lower end of the stop block (6) is in contact fit with the shell structure (1), the rebound spring (8) is in a state of compressing and accumulating elastic potential energy.

2. A resilient safety injection needle according to claim 1, wherein: the shell structure (1) comprises an outer cylinder (11), the lower end of the outer cylinder (11) is fixedly provided with a mounting pipe (12), and the inner cavity of the mounting pipe (12) is communicated with the inner cavity of the outer cylinder (11); the lower stop block (6) and the inner wall of the mounting pipe (12) form sliding seal; the inner cylinder (4) is fixedly arranged on the inner cylindrical surface of the mounting pipe (12), the bottom surface of the outer cylinder (11) is fixedly provided with a plurality of rebound trigger frames (13), and the rebound trigger frames (13) are distributed in an annular array mode by taking the central line of the outer cylinder (11) as the array center; the rebound trigger frame (13) consists of a rebound trigger block (131) and a connecting arc bar (132).

3. A resilient safety injection needle according to claim 2, wherein: the longitudinal section of the rebound trigger block (131) is triangular, and the connecting arc strip (132) is made of elastic material; one end of the connecting arc strip (132) is fixedly connected with the bottom surface of the outer barrel (11), and the other end of the connecting arc strip is fixedly connected with the rebound trigger block (131); one end that meets with connecting arc strip (132) on resilience trigger block (131) contacts the cooperation with the upper end of ending down piece (6), and when resilience trigger block (131) contacts the cooperation with the upper end of ending down piece (6), resilience spring (8) are in the compression and accumulate the elastic potential energy state.

4. A resilient safety injection needle according to claim 3, wherein: the rebound pressing structure (2) comprises an inner tube (21), the inner tube (21) is positioned in the outer tube (11), a connector (22) is fixedly installed at the lower end of the inner tube (21), a lower stopping top plate (23) is fixedly installed on the inner cylindrical surface of the inner tube (21), and the lower stopping top plate (23) is arranged in an upward inclined mode; and a guard plate (24) is fixedly arranged on the upper side of the inner cylindrical surface of the inner pipe (21), and the guard plate (24) is arranged above the lower stop top plate (23).

5. A resilient safety injection needle according to claim 4, wherein: the transmission structure (3) comprises a transmission block (31), the upper end of the transmission block (31) is provided with a clamping cavity (32), the lower end of the transmission block (31) is provided with a mounting cavity (33), and the lower end of the transmission block (31) is fixedly provided with a rebound driving block (332); the mounting cavity (33) is communicated with the clamping cavity (32) and penetrates through the lower end face of the rebound driving block (332); a clamping groove (331) is formed in the wall of the mounting cavity (33); the outer side face of the auxiliary block (7) is fixedly provided with a clamping ring (71), and the auxiliary block (7) and the clamping ring (71) are respectively matched with the mounting cavity (33) and the clamping groove (331).

6. A resilient safety injection needle according to claim 5, wherein: the inner tube (21) and the connector (22) are integrally manufactured, and an inner cavity of the inner tube (21) penetrates through the lower end face of the connector (22); the connector (22) is clamped and installed in the clamping cavity (32); the outer surface of transmission piece (31) and the internal surface of resilience trigger block (131) constitute the inclined plane transmission, when transmission piece (31) move down, resilience trigger block (131) swing to the section of thick bamboo bottom surface of outer section of thick bamboo (11), make and connect arc strip (132) bending, when resilience trigger block (131) swing to break away from the contact with end piece (6), resilience spring (8) kick-back resets, make supplementary piece (7), end piece (6), needle file (5) and syringe needle (9) move to backplate (24) in inner tube (21) inner chamber, with syringe needle (9) income shell structure (1) in.

7. A resilient safety injection needle according to claim 6 wherein: the upper end surface of the lower stop top plate (23) is in contact fit with the lower end surface of the lower stop block (6), and the injection needle head (9) is kept in the shell structure (1) when the upper end surface of the lower stop top plate (23) is in contact fit with the lower end surface of the lower stop block (6).

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