JP2007225054A - Telescopic pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a telescopic pipe adaptable to both right-handed and left-handed persons and at least twice as durable as conventional one, wherein an small-diameter pipe can be unmovably locked to a large-diameter pipe with a lever turned either in one direction or in the opposite direction. <P>SOLUTION: The small-diameter pipe 3 is telescopically inserted into the large-diameter pipe 2. When the small-diameter pipe 3 is inserted a required length thereinto, the small-diameter pipe 3 is unmovably locked to the large-diameter pipe 2. When the lever 7 is in a neutral condition, a key 8 is not thrust against the small-diameter pipe 3 and the small-diameter pipe 3 is in a telescopic condition relative to the large-diameter pipe 2. When the lever 7 is turned to one side, a diameter-enlarged portion 6b on one side of an eccentric cam 6 pushes the key 8. Then, the key 8 is pushed against the outer peripheral face of the small-diameter pipe 3 to lock the small-diameter pipe 3. When the lever 7 is rotated to the other side, a diameter-enlarged portion 6c on the other side of the eccentric cam 6 pushes the key 8. Then, the key 8 is pushed against the outer peripheral face of the small-diameter pipe 3 to lock the small-diameter pipe 3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention has a large-diameter pipe and a small-diameter pipe inserted into the large-diameter pipe, and the small-diameter pipe is telescopically inserted into the large-diameter pipe. The present invention relates to a telescopic tube in which a small-diameter pipe is locked so as not to move with respect to a large-diameter pipe.

  FIG. 12 shows a prior art expansion tube positioning device disclosed by Utility Model Registration No. 306522 (Patent Document 1), (12A) is an exploded perspective view thereof, (12B) is a longitudinal sectional view thereof, and (12C). FIG. 3 is a plan sectional view when the inner tube of the telescopic tube is tightened. Referring to (12A), (12B), and (12C), this telescopic tube positioning device according to the prior art includes one positioning tube 101 that is provided on the outer tube 103 of the telescopic tube, and is positioned on one side of the positioning tube 101. One convex ear 110 is provided. A hole 102 penetrating the wall surface of the positioning cylinder 101 is provided near the upper edge of the convex ear 110, and an eccentric locking body 111 is provided in the hole 102. A groove 113 is provided in the locking side 112 portion of the locking body 111, and a locking piece 121 having a shape corresponding to the locking groove 113 is fitted into the locking groove 113. It protrudes slightly from the surface of the locking side 112. The locking piece 121 is made of a material such as rubber having elasticity and plasticity so that the locking body 111 presses the inner tube 120 of the expansion tube with an appropriate pressure when positioning the expansion tube. Yes.

13 shows a conventional telescopic tube disclosed in Japanese Patent Laid-Open No. 2003-130017 (Patent Document 2), (13A) is a perspective view thereof, and (13B) is a clamp mechanism of the telescopic tube operated to a locked position. It is a perspective view which shows the done state in a partial cross section. To explain with reference to (13A) and (13B), this conventional telescopic tube includes a first pipe 211, a second pipe 212, and a clamp mechanism 213. The clamp mechanism 213 includes a base member 220 provided in the first pipe 211, a lever 222, a pressing member 230, a lock member 240, and a lock hole 245 formed in the second pipe 212. The pressing member 230 is movable in the radial direction of the second pipe 212. When the lever 222 is operated to the lock position, the pressing member 230 is pressed toward the outer peripheral surface 212b of the second pipe 212 by the cam surface 225, and the locking member 240 is pressed by the inner surface 222a of the lever 222. In this way, the tip 241 of the lock member 240 is inserted into the lock hole 245 by being pushed.
Utility Model Registration No. 3065222 JP 2003-130017 A

  However, in the conventional telescopic tube positioning device shown in FIG. 12, the eccentric locking body 111 is rotated only in one direction, and the locking piece 121 is pressed against the inner tube 120 to move against the inner tube 120. The outer tube 103 was made immovable. Therefore, since the locking body 111 is rotated only in one direction, it can be used only by a right-handed person or a left-handed person, and cannot support both a right-handed person and a left-handed person. There was a problem. In other words, a right-handed person can rotate the locking body 111 only clockwise with the finger of the toe arm, but cannot rotate counterclockwise. Further, the left-handed person can rotate the locking body 111 only with the finger of the toe arm in the counterclockwise direction, but cannot rotate in the clockwise direction. Therefore, it was impossible to deal with both the right-handed person and the left-handed person. Further, since the eccentric locking body 111 is rotated only in one direction, there is a problem that the eccentric part of the locking body 111 is easily worn and inferior in durability.

  Further, in the conventional telescopic tube shown in FIG. 13, the lever 222 is rotated only in one direction, so that there is a problem that it cannot cope with both the right-handed person and the left-handed person. . Further, since the cam surface 225 is easily worn because it is rotated only in one direction, there is a problem that the durability is inferior. Further, the second pipe 212 cannot be moved relative to the first pipe 211 due to the pressing of the outer peripheral surface 212 b of the second pipe 212 by the pressing member 230 and the insertion of the distal end 241 of the locking member 240 into the lock hole 245. I was doing. Therefore, there are problems that the number of parts is large and the structure becomes complicated.

  The present invention has been made in view of the above-described conventional problems, has a simple structure, and moves a small-diameter pipe relative to a large-diameter pipe even if the lever is rotated in one direction or the opposite direction. Can be locked impossible. Accordingly, it is an object of the present invention to provide a telescopic tube that can be adapted to both a right-handed person and a left-handed person. In addition, even if the lever is rotated in one direction or the opposite direction, the small-diameter pipe can be locked against the large-diameter pipe in an immovable manner, and the durability is more than doubled compared to the conventional one. An object of the present invention is to provide a telescopic tube that can be used.

  The present invention has been proposed in order to solve the above-described problem, and a first embodiment of the present invention includes a large-diameter pipe and a small-diameter pipe inserted into the large-diameter pipe. Expansion and contraction in which the small diameter pipe is inserted in a telescopic manner with respect to the pipe, and the small diameter pipe is immovably locked with respect to the large diameter pipe when the required length of the small diameter pipe is inserted. When the small-diameter pipe is inserted into the large-diameter pipe for a required length in the universal pipe, the small-diameter pipe is enlarged regardless of whether the lever protruding outside is rotated in one direction or the opposite direction. It is a telescopic tube provided with a two-way locking means for locking the diameter pipe so as not to move.

  According to a second aspect of the present invention, in the first aspect, the bi-directional lock means includes a lock member having the lever and an eccentric cam formed with enlarged diameter portions on both sides, and the eccentric cam of the lock member. A shaft portion that is rotatably held; and a holder that is attached to the shaft portion and that is externally fitted to the small-diameter pipe and the large-diameter pipe, and rotates the lever in either the one direction or the reverse direction. However, it is a telescopic tube in which the small-diameter pipe is locked so as not to move with respect to the large-diameter pipe by the enlarged-diameter portion of the eccentric cam.

  According to a third aspect of the present invention, in the second aspect, a key is disposed in an opening formed in the holder and the large-diameter pipe, and the lever is moved in either one direction or the opposite direction. The telescopic tube is a telescopic tube that locks the small-diameter pipe so that it cannot move even when the key is pressed against the outer surface of the small-diameter pipe by the enlarged-diameter portion of the eccentric cam.

  According to a fourth aspect of the present invention, in the first, second, or third aspect, the lever is rotated in either direction perpendicular to or substantially perpendicular to the axial direction of the large diameter pipe and the small diameter pipe. It is a telescopic tube that can be made to do.

  According to a fifth aspect of the present invention, in the first, second or third aspect, the lever is rotated in both directions parallel to or substantially parallel to the axial direction of the large diameter pipe and the small diameter pipe. It is a telescopic tube that can be made to do.

  According to a sixth aspect of the present invention, in the third, fourth, or fifth aspect, a cylindrical body that can move to the small-diameter pipe is externally fitted, and an end portion of the small-diameter pipe is cut into the small-diameter pipe. A blocking member having inward projections engaged with the two locking holes provided is detachably attached, and the cylindrical body is prevented from moving by contacting the cylindrical body against the blocking member. A telescopic tube configured to prevent the holder from being pulled out by a body.

  According to a seventh aspect of the present invention, in the sixth aspect, an inner flange is provided on the inner circumference of the holder, and an outer collar is provided on the outer circumference of the end of the cylindrical body. When the holder is externally inserted into the cylindrical body, the inward flange portion and the outward flange portion are brought into contact with each other and locked so that the small diameter pipe is prevented from coming off from the large diameter pipe. It is a telescopic tube.

  According to an eighth aspect of the present invention, in any one of the first to seventh aspects, an inner peripheral surface of the large-diameter pipe and an outer peripheral surface of the small-diameter pipe are formed in a non-circular shape, and the small-diameter is formed on the large-diameter pipe. It is a telescopic tube in which the pipe is inserted so as not to be relatively rotatable.

  According to a ninth aspect of the present invention, in the eighth aspect, at least part of the inner peripheral surface of the large-diameter pipe and the outer peripheral surface of the small-diameter pipe is formed with a flat portion extending in the axial direction. It is a universal tube.

  According to a tenth aspect of the present invention, in the eighth aspect, a longitudinal groove is formed on an inner peripheral surface of the large-diameter pipe or an outer peripheral surface of the small-diameter pipe, and an inner surface of the small-diameter pipe or an inner surface of the large-diameter pipe is formed. It is a telescopic tube in which a vertical protrusion that is engaged with the vertical groove portion is formed on the peripheral surface.

  According to an eleventh aspect of the present invention, in any one of the first to tenth aspects, a grip is attached to the outer peripheral surface of the base end portion of the large-diameter pipe. Is a telescopic tube provided with a retaining portion against which the end of the small-diameter pipe abuts.

  According to the first aspect of the present invention, the small-diameter pipe is locked against the large-diameter pipe by the two-way locking means even if the outwardly projecting lever is rotated in either one direction or the reverse direction. it can. Therefore, the durability can be improved more than twice as compared with the conventional one that can be rotated in only one direction. When either the one direction or the reverse direction is perpendicular to the axial direction of the large-diameter pipe and the small-diameter pipe or both sides of the substantially perpendicular direction, the lever corresponds to both the right-handed person and the left-handed person. it can. That is, the right-handed person or the left-handed person can turn the lever, and the small-diameter pipe can be locked to the large-diameter pipe so as not to move. In this case, since the lever can be rotated with the finger of one hand while holding the large-diameter pipe with one hand, the lever can be rotated with one hand.

  In addition, any direction of one direction and the opposite direction is parallel to or substantially parallel to the axial direction of the large-diameter pipe and the small-diameter pipe, or oblique to the axial direction of the large-diameter pipe and small-diameter pipe. It includes both directions on both sides. In these cases, the lever is rotated with the finger of the other hand while holding the large-diameter pipe with one hand. When either one direction or the opposite direction is parallel or substantially parallel to the axial direction of the large-diameter pipe and the small-diameter pipe, the lever is lateral to the axial direction of both pipes. It can be prevented from protruding. Therefore, there are advantages that the appearance can be improved and the lever does not get in the way. The telescopic tube of the present invention is in a locked state when the lever is rotated in one direction and in the opposite direction, and in a neutral release state when the lever is at the center position. The telescopic tube of the present invention can be applied to a cleaning tool handle, a tripod, a laundry basket, and the like.

  According to the second aspect of the present invention, the bidirectional lock means is attached to the lock member having the lever and the eccentric cam having the enlarged diameter portions formed on both sides, the shaft portion holding the eccentric cam, and the shaft portion. A small diameter pipe and a holder externally fitted to the large diameter pipe. Accordingly, the number of parts is minimized, and the structure can be simplified. Since the eccentric cam has enlarged diameter portions on both sides, when the small diameter pipe rotates this lever in either one direction or the opposite direction, any of the enlarged diameter portions on both sides of the eccentric cam. Also, the durability of the eccentric cam can be improved by being pressed. That is, the durability can be improved by more than twice as compared with a conventional telescopic tube using a cam eccentric on only one side.

  According to the third aspect of the present invention, the key is disposed in the opening formed in the holder and the large-diameter pipe, and the small-diameter pipe cannot be moved relative to the large-diameter pipe by the enlarged-diameter portion of the eccentric cam. Since it is locked, the enlarged diameter portion of the eccentric cam does not contact the outer peripheral surface of the small diameter pipe. Therefore, the durability of the eccentric cam can be improved and the small diameter pipe can be reliably locked by pressing the key against the small diameter pipe.

  According to the fourth aspect of the present invention, the lever is rotated in both directions perpendicular to or substantially perpendicular to the axial direction of the large-diameter pipe and the small-diameter pipe. It can be done by both kid and left-handers. Further, the lever can be operated with the finger of the same one hand while holding the large-diameter pipe with one hand.

  According to the fifth aspect of the present invention, the lever is rotated in both directions parallel to or substantially parallel to the axial direction of the large diameter pipe and the small diameter pipe. The lever does not protrude. Therefore, the appearance can be improved and the lever can be easily carried without being disturbed. In this case, the shaft portion is oriented in a direction perpendicular or substantially perpendicular to the holder, and when the large-diameter pipe and the small-diameter pipe are oriented in the vertical direction, the shaft portion is inadvertently detached from the holder. Can be prevented.

  According to the sixth aspect of the present invention, a movable cylindrical body is fitted onto the small-diameter pipe, and the end of the small-diameter pipe is engaged with the two locking holes drilled in the small-diameter pipe. A blocking member having an inward projection is detachably attached. Therefore, when the cylindrical body comes into contact with the blocking member attached to the small-diameter pipe, the cylindrical body can be prevented from moving, and the cylindrical body can prevent the holder from being removed from the small-diameter pipe. Further, when disassembling each member, the whole can be disassembled by removing the blocking member from the small diameter pipe and removing the blocking member, then removing the cylindrical body from the small diameter pipe and removing the holder from the small diameter pipe. . Therefore, since each member can be easily attached and detached, maintenance such as replacement of the member can be easily performed. The blocking member is divided into two halves and each has an inward projection that engages with the locking hole of the small-diameter pipe, or one side has a hinge structure and the other side can be opened and closed separately. Further, there are those provided with inward projections to be engaged with the locking holes of the small-diameter pipe.

  According to the seventh aspect of the present invention, the small-diameter pipe is prevented from coming off from the large-diameter pipe by the inward flange portion of the holder and the outward collar portion of the cylindrical body abutting and locking. With a simple structure, the small diameter pipe can be prevented from coming off from the large diameter pipe.

  According to the eighth aspect of the present invention, the inner peripheral surface of the large-diameter pipe and the outer peripheral surface of the small-diameter pipe are non-circular, and the small-diameter pipe is inserted into the large-diameter pipe so as not to be relatively rotatable. There is an advantage that it is easy to handle the tube. Further, even if the small-diameter pipe is expanded and contracted with respect to the large-diameter pipe, the small-diameter pipe does not rotate in the circumferential direction with respect to the large-diameter pipe.

  According to the ninth aspect of the present invention, since the flat portion is formed at least partially in the axial direction on the outer peripheral surface of the inner peripheral surface of the large-diameter pipe and the outer peripheral surface of the small-diameter pipe, the simple shape Thus, the large diameter pipe and the small diameter pipe can be made relatively non-rotatable.

  According to the tenth aspect of the present invention, the longitudinal groove on the outer peripheral surface of the small diameter pipe or the inner peripheral surface of the large diameter pipe is formed in the longitudinal groove portion formed on the inner peripheral surface of the large diameter pipe or the outer peripheral surface of the small diameter pipe. The small diameter pipe can be reliably made incapable of rotating with respect to the large diameter pipe. Therefore, there exists an advantage which is easy to handle a large diameter pipe and a small diameter pipe.

  According to the eleventh aspect of the present invention, the retaining portion on which the end portion of the small-diameter pipe abuts is provided at the proximal end portion of the grip attached to the outer peripheral surface of the proximal end portion of the large-diameter pipe. Thus, the small diameter pipe can be prevented from being pulled out from the proximal end portion of the large diameter pipe.

Hereinafter, embodiments of the telescopic tube according to the present invention will be described in detail with reference to FIGS.
FIG. 1 is an exploded perspective view of an embodiment of a telescopic tube according to the present invention. As shown in FIG. 1, the telescopic tube 1 includes a large-diameter pipe 2, a small-diameter pipe 3, a holder 4, a lever 7 pivotally attached to the holder 4 by a shaft portion 5 and having an eccentric cam 6. A key 8, a cylindrical body 9, and half-shaped blocking members 10 and 10 are provided. The large-diameter pipe 2 and the small-diameter pipe 3 are formed with a pair of left and right flat portions 2a and 3a, respectively, so that when the small-diameter pipe 3 is inserted into the large-diameter pipe 2, relative rotation is impossible. The holder 4 is externally fitted to the small-diameter pipe 3, and upper and lower protruding pieces 4a and 4a are provided on one side thereof, and shaft insertion holes 4b and 4b are formed vertically on the protruding pieces 4a and 4a. Has been. Further, the holder 4 is provided with an inward flange portion 4c at the upper end.

  The lever 7 is arranged so as to face up and down, and an eccentric cam 6 formed integrally with the lever 7 is formed in a horizontal direction, and a shaft insertion hole 6a is formed in the eccentric portion. In addition, enlarged diameter portions 6b and 6c are formed on both sides of the shaft insertion hole 6a in the eccentric cam 6, and the eccentric cam 6 is formed in a horizontal direction. The key 8 is fitted into openings 2b, 4d and 9a formed in the large diameter pipe 2, the holder 4 and the cylindrical body 9. The cylindrical body 9 is provided with an outward flange 9b at the upper end, and is inserted through the small diameter pipe 3 in a non-rotatable manner by a pair of left and right flat portions 9c, 9c. Two locking holes 3b and 3b are formed in the lower end portion of the small diameter pipe 3, and inward projections 10a and 10a provided on the inner surfaces of the half-shaped blocking members 10 and 10 are used to lock the small diameter pipe 3. The holes 3b and 3b are inserted into the holes. The blocking member 10 is not limited to a halved shape, but can be opened and closed by separating the other side with a hinge structure on one side, and an inward projection 10a engaged with the locking holes 3b and 3b of the small-diameter pipe 3. 10a, etc., respectively.

  FIG. 2 is an exploded perspective view of the state shown in FIG. 1 with the blocking member attached. As shown in FIG. 2, the inward projections 10 a and 10 a (see FIG. 1) of the half-shaped blocking members 10 and 10 are engaged with the locking holes 3 b and 3 b (see FIG. 1) of the small-diameter pipe 3 and blocked. The members 10 and 10 are attached to the small diameter pipe 3. In this state, the blocking member 10, 10 prevents the tubular body 9 from coming out of the small diameter pipe 3.

  FIG. 3 is an exploded perspective view showing a state in which the large-diameter pipe is inserted into the small-diameter pipe from the state of FIG. As shown in FIG. 3, the large-diameter pipe 2 is inserted into the small-diameter pipe 3, and the large-diameter pipe 2 is externally fitted to the blocking members 10 and 10 and the cylindrical body 9, and the upper end is cylindrical. The body 9 is in contact with the outward flange 9b.

  FIG. 4 is an exploded perspective view of the state in which the holder is put on the large-diameter pipe from the state of FIG. As shown in FIG. 4, when the large-diameter pipe 2 is inserted into the holder 4, the outward flange portion 9 b (see FIG. 3) of the cylindrical body 9 is brought into contact with and locked with the inward flange portion 4 c of the holder 4. The small diameter pipe 3 is prevented from coming off from the diameter pipe 2.

  FIG. 5 is a perspective view showing an assembled state of the telescopic tube. As shown in FIG. 5, the eccentric cam 6 is fitted with the key 8 fitted in the openings 2b, 4d, 9a (see FIG. 1) formed in the large-diameter pipe 2, the holder 4, and the cylindrical body 9. Is pivotally supported on the holder 4 by the shaft portion 5. That is, the shaft portion 5 is inserted into the shaft insertion holes 4 b and 4 b of the holder 4 and the shaft insertion hole 6 a of the eccentric cam 6, and the eccentric cam 6 is pivotally supported on the holder 4 by the shaft portion 5.

  FIG. 6 is a longitudinal sectional view of a state in which a small-diameter pipe is extended with respect to a large-diameter pipe. As shown in FIG. 6, the small diameter pipe 3 is extended with respect to the large diameter pipe 2. At this time, the outward flange 9 b of the cylindrical body 9 is brought into contact with and locked to the inward flange 4 c of the holder 4, so that the small diameter pipe 3 is connected to the cylindrical body 9 and the blocking members 10, 10 with respect to the large diameter pipe 2. It will be in the state of retaining through. When the lever 7 is in a neutral state, a gap portion 8 a is formed between the small diameter pipe 3 and the key 8.

  FIG. 7 is a longitudinal sectional view of a state in which the small diameter pipe is contracted with respect to the large diameter pipe. As shown in FIG. 7, the small diameter pipe 3 is contracted with respect to the large diameter pipe 2. Therefore, the small diameter pipe 3 can be freely expanded and contracted with respect to the large diameter pipe 2. When the lever 7 is in a neutral state, a gap portion 8 a is formed between the small diameter pipe 3 and the key 8.

  FIG. 8 is a longitudinal sectional view showing a state where a grip is attached to a base end portion of a large-diameter pipe. As shown in FIG. 8, a grip 11 is attached to the outer peripheral surface of the proximal end portion of the large diameter pipe 2, and the lower end portion of the small diameter pipe 3 is brought into contact with the proximal end portion of the grip 11. A horizontal retaining portion 11a is provided. An air vent hole 11b is formed in the retaining portion 11a.

  FIG. 9 shows the locked and unlocked state of the telescopic tube by the operation of the lever, (9A) is a cross-sectional view of the main part showing the unlocked state, and (9B) shows the locked state where the lever is rotated to one side. FIG. 9C is a cross-sectional view of the main part showing a locked state in which the lever is rotated to the other side. As shown in (9A), when the lever 7 is in the neutral state, the key 8 is not pressed by the small diameter pipe 3, and a gap portion 8a is formed between the key 8 and the small diameter pipe 3, so that the large diameter pipe 2 On the other hand, the small-diameter pipe 3 is in a freely stretchable state. As shown in (9B), when the lever 7 is rotated to one side, the enlarged diameter portion 6b on one side of the eccentric cam 6 presses the key 8, and the key 8 is pressed against the outer peripheral surface of the small diameter pipe 3. Locked in the pressure contact state. In this state, the small-diameter pipe 3 is locked to the large-diameter pipe 2 so as not to move. As shown in (9C), when the lever 7 is rotated to the other side, the enlarged diameter portion 6c on the other side of the eccentric cam 6 pushes the key 8, and this key 8 is pushed against the outer peripheral surface of the small diameter pipe 3. Locked in a pressure contact state. In this state, the small-diameter pipe 3 is locked to the large-diameter pipe 2 so as not to move.

  Therefore, even if the lever 7 is rotated in either the left or right direction, the small-diameter pipe 3 can be locked against the large-diameter pipe 2 so that the lever 7 can be operated by a right-handed person or a left-handed person. Thus, the small diameter pipe 3 can be locked with respect to the large diameter pipe 2. In addition, since the lever 7 can be locked by rotating in either the left or right direction, the lever 7 can be pushed against the outer peripheral surface of the small-diameter pipe 3 by pushing the lever 7 with the enlarged diameter portions 6 b and 6 c on both sides of the eccentric cam 6. In comparison with the conventional telescopic tube, it can be improved twice or more.

  FIG. 10 is a perspective view of a state in which the telescopic tube according to the present invention is applied to the handle of a mop. As shown in FIG. 10, the telescopic tube 1 according to the present invention is applied as a handle of a mop 12, and bifurcated support pieces 14 and 15 of a cleaning member holder 13 are attached to the lower end of the handle. The bifurcated support pieces 14 and 15 are inserted into pockets 18 and 19 on both sides of a cleaning member 17 having a plurality of piles 16 on the lower surface. In this state, the small-diameter pipe 3 can be locked to the large-diameter pipe 2 so as not to move even if the lever 7 is rotated in either the left or right direction of the arrow.

  FIG. 11 is a perspective view of a state in which the handle is extended from the state of FIG. As shown in FIG. 11, even if the small-diameter pipe 3 is extended to the large-diameter pipe 2 by a required length and the lever 7 is rotated in either the left or right direction of the arrow, the small-diameter pipe 3 can be locked so as not to move.

  In the above-described embodiment, the lever 7 is described as being rotatable to the left and right sides. However, the lever 7 can be configured to be vertically movable to both the upper and lower sides. It can comprise so that it can also rotate in the direction.

  The present invention is not limited to the above-described embodiments and modifications, and includes various modifications and design changes within the technical scope without departing from the technical idea of the present invention. Needless to say.

  The telescopic tube according to the present invention can be applied to a handle, a tripod, a clothes rack, etc. of a cleaning tool, and can be used for both home use and business use. Moreover, what expands and contracts a small diameter pipe with respect to a large diameter pipe can be applied to any product.

It is a disassembled perspective view of embodiment of the telescopic tube which concerns on this invention. It is a disassembled perspective view of the state which attached the blocking member from the state of FIG. It is a disassembled perspective view which shows the state which penetrated the large diameter pipe from the state of FIG. 2 to the small diameter pipe. It is a disassembled perspective view of the state which covered the holder on the large diameter pipe from the state of FIG. It is a perspective view which shows the assembly completion state of a telescopic tube. It is a longitudinal cross-sectional view of the state which extended the small diameter pipe with respect to the large diameter pipe. It is a longitudinal cross-sectional view of the state which contracted the small diameter pipe with respect to the large diameter pipe. It is a longitudinal cross-sectional view of the state where the grip was attached to the base end part of the large diameter pipe. FIG. 9A shows a locked and unlocked state of a telescopic tube by operating a lever, FIG. 9A is a cross-sectional view of the main part showing the unlocked state, and FIG. 9B is a main part showing a locked state where the lever is rotated to one side. (9C) is a cross-sectional view of the main part showing a locked state in which the lever is rotated to the other side. It is a perspective view of the state where the telescopic tube concerning the present invention was applied to the handle of a mop. It is a perspective view of the state which extended the handle from the state of FIG. FIG. 1 shows a conventional expansion tube positioning device, (12A) is an exploded perspective view thereof, (12B) is a longitudinal sectional view thereof, and (12C) is a plan sectional view when the inner tube of the expansion tube is tightened. FIG. 13 is a perspective view showing a conventional telescopic tube, (13A) is a perspective view thereof, and (13B) is a perspective view partially showing a state in which a clamp mechanism of the telescopic tube is operated to a lock position.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Telescopic pipe 2 Large diameter pipe 2a Flat part 2b Opening part 3 Small diameter pipe 3a Flat part 3b Locking hole 4 Holder 4a Projection piece part 4b Shaft insertion hole 4c Inward flange part 4d Opening part 5 Shaft part 6 Eccentric cam 6a Shaft insertion Hole 6b Expanded portion 6c Expanded portion 7 Lever 8 Key 8a Gap portion 9 Tubular body 9a Opening portion 9b Outward flange 9c Flat portion 10 Blocking member 10a Inward projection 11 Grip 11a Detachment portion 11b Air vent hole 12 Mop 13 Cleaning member holding Tool 14 Support piece 15 Support piece 16 Pile 17 Cleaning member 18 Pocket portion 19 Pocket portion

Claims (11)

A large-diameter pipe and a small-diameter pipe inserted into the large-diameter pipe, and the small-diameter pipe is telescopically inserted into the large-diameter pipe, and when the small-diameter pipe is inserted to a required length The telescopic pipe in which the small-diameter pipe is locked so as to be immovable with respect to the large-diameter pipe, and when the small-diameter pipe is inserted into the large-diameter pipe by a required length, it is projected to the outside. A telescopic tube comprising bi-directional locking means for locking the small-diameter pipe to the large-diameter pipe so that the small-diameter pipe cannot be moved regardless of whether the lever is rotated in one direction or the reverse direction. The bi-directional locking means includes a lock member having the lever and an eccentric cam formed with enlarged diameter portions on both sides, a shaft portion for rotatably holding the eccentric cam of the lock member, and the shaft portion attached And the small diameter pipe and a holder externally fitted to the large diameter pipe, and the small diameter pipe is formed by the large diameter portion of the eccentric cam even when the lever is rotated in either the one direction or the reverse direction. The telescopic tube according to claim 1, wherein the telescopic tube is locked so as not to move with respect to the large-diameter pipe. A key is disposed in an opening formed in the holder and the large-diameter pipe, and the key is moved by the diameter-enlarged portion of the eccentric cam even if the lever is rotated in either the one direction or the reverse direction. The telescopic tube according to claim 2, wherein the telescopic tube is pressed against an outer surface of the small-diameter pipe to lock the small-diameter pipe so as not to move. The telescopic tube according to claim 1, 2 or 3, wherein the lever is rotated in either direction perpendicular or substantially perpendicular to the axial direction of the large-diameter pipe and small-diameter pipe. The telescopic tube according to claim 1, 2 or 3, wherein the lever is rotated in either direction parallel to or substantially parallel to the axial direction of the large diameter pipe and the small diameter pipe. A movable cylindrical body is externally fitted to the small-diameter pipe, and a blocking member having an inward projection inserted into two locking holes formed in the small-diameter pipe is attached to and detached from the end of the small-diameter pipe. 6. The cylindrical body is attached so as to be capable of preventing the cylindrical body from moving when the cylindrical body abuts against the blocking member, and the cylindrical body prevents the holder from being pulled out. The telescopic tube described in 1. An inward flange is provided on the inner periphery of the holder, an outward flange is provided on the outer periphery of the end of the cylindrical body, and when the holder is externally inserted into the cylindrical body, The telescopic tube according to claim 6, wherein the small-diameter pipe is prevented from coming out of the large-diameter pipe by contacting and locking the inward-side collar and the outward collar. The inner peripheral surface of the large-diameter pipe and the outer peripheral surface of the small-diameter pipe are formed in a non-circular shape, and the small-diameter pipe is inserted into the large-diameter pipe so as not to be relatively rotatable. Telescopic tube. The telescopic tube according to claim 8, wherein a flat portion is formed at least partially in an axial direction on an inner peripheral surface of the large-diameter pipe and an outer peripheral surface of the small-diameter pipe. A vertical groove is formed on the inner peripheral surface of the large-diameter pipe or the outer peripheral surface of the small-diameter pipe, and is inserted into the vertical groove portion on the outer peripheral surface of the small-diameter pipe or the inner peripheral surface of the large-diameter pipe. The telescopic tube according to claim 8, wherein: A grip is attached to an outer peripheral surface of a base end portion of the large-diameter pipe, and a retaining portion on which an end portion of the small-diameter pipe abuts is provided at the base end portion of the grip. The telescopic tube according to any one of 1 to 10.

Images