JP2008086357A - Puncture device and cartridge for use in puncture device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely prevent both of the reuse of a used cartridge to a puncture device and the outward projection of a puncture needle incorporated in the cartridge. <P>SOLUTION: A housing 84 constituting the cartridge 22 is fitted with a hub base 86 capable of retaining a hub 20 having the puncture needle 18. When the cartridge 22 is installed on the puncture device 10, a guide part 92 of the hub base 86 pushes down a hook portion 66 of a swinging hook 56 in the puncture device 10 to release the displacement regulation state of the cartridge 22 and, when the cartridge 22 is removed from the puncture device 10, the displacement regulation state by the swinging hook 56 is retained so as not to be released. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a puncture device that draws blood by puncturing the skin of a measurer, and a cartridge that has a puncture needle that can advance and retreat in the axial direction and is used by being attached to the puncture device.

  In recent years, diabetic patients have been encouraged to perform daily self-management by measuring their own blood glucose level fluctuations. Puncture that punctures the skin by applying a repulsive force by an elastic body to a puncture needle that can advance and retreat in the axial direction when the patient collects his / her blood for measuring this blood glucose level. A small amount of blood is derived by using a tool. The cartridge including the puncture needle is removed from the puncture tool and discarded every time measurement is performed for hygienic reasons, and is not reused.

  However, a used cartridge may be accidentally remounted on the puncture device, which may cause sanitary problems. Therefore, a puncture needle unit that can prevent the reuse of such a used cartridge has been developed (for example, see Patent Document 1).

  In this puncture needle unit, a puncture needle is displaceably provided inside a spring member provided on the outer member, and after puncture is performed by the puncture needle, the puncture needle is detached from the spring member. At this time, since the diameter of the spring member is reduced in the radially inward direction, the puncture needle that is displaced again toward the outer side of the outer member is brought into contact with and engaged with the end of the spring member. As a result, the puncture needle cannot protrude and puncture again outside the outer member, and the puncture needle unit is not reused.

  Further, when discarding a used cartridge, there is a concern that the puncture needle housed in the cartridge protrudes and is erroneously inserted. Therefore, a puncture needle unit is known in which the puncture needle does not protrude again when it is removed from the puncture device (see, for example, Patent Document 2).

JP 2004-290390 A JP 2005-185712 A

  By the way, in the prior art which concerns on patent document 2, since it is not the structure by which a needle | hook is completely hold | maintained inside an outer member, there is a concern that the said needle | hook may protrude outside from the needle | hook tip exit of the said outer member accidentally. Is done.

  The present invention has been made in consideration of the above-described problems, and can reliably prevent reuse of a used cartridge with respect to the puncture device and protrusion of the puncture needle incorporated in the cartridge to the outside. An object of the present invention is to provide a possible puncture device and a cartridge used for the puncture device.

In order to achieve the above object, the present invention provides a puncture apparatus that is used by mounting a cartridge including a puncture needle that can advance and retreat in the axial direction.
A casing having an opening;
A cartridge having a housing and a hub provided with the puncture needle and provided inside the housing;
Stopper means provided inside the casing and capable of regulating displacement of the cartridge relative to the casing;
Release means provided in the cartridge, for releasing the displacement restriction state of the cartridge by the stopper means;
With
When the cartridge is attached to the puncture device, the release means releases the displacement restriction state by the stopper means and is relatively displaced along the axial direction with respect to the housing, while being detached from the puncture device. When the mounted cartridge is remounted, the release means cannot release the displacement restricted state by the stopper means.

  According to the present invention, the cartridge to be mounted on the puncture device is constituted by a housing and a hub provided inside the housing and having a puncture needle, and the cartridge is displaced inside the casing constituting the puncture device. Stopper means capable of restricting the cartridge is provided, and the displacement restriction state of the cartridge can be released by the releasing means. When the cartridge is mounted on the casing, the release means is displaced relative to the housing, and the stopper means is brought into a state in which it cannot be released from the displacement restriction state where the displacement of the cartridge can be restricted. Therefore, when the cartridge is removed from the casing and is mounted again, the displacement of the cartridge is restricted by the stopper means to prevent the mounting.

  Accordingly, since the cartridge can be reliably prevented from being reattached to the casing, the used cartridge is not erroneously attached to the puncture device. It can be avoided.

  The stopper means is provided such that when the cartridge is inserted from the opening of the casing, one end side in the mounting direction of the cartridge is provided so as to be able to contact a step provided in the cartridge. The displacement of the cartridge can be reliably stopped by the stopper means via the stepped portion.

  Further, the stopper means is composed of a tilting member provided so as to be tiltable with a support shaft supported by the casing as a fulcrum, and the tilting member is tilted and displaced by pressing one end of the mounting direction of the cartridge by the releasing means. The displacement restriction state of the cartridge may be released. In other words, the displacement restriction state of the cartridge caused by the one end portion of the tilting member coming into contact with the cartridge can be easily and reliably released.

  Still further, the release means includes a base body that is provided inside the housing and has an engaging portion that is engaged with the hub, and the cartridge is attached to the casing in a state where the base body and the housing are fitted. When mounted, the displacement restricting state may be released by pressing one end of the stopper means. Thus, the cartridge can be mounted on the casing, and the stopper means can be pressed by the base body to easily release the cartridge displacement restriction state.

Still further, the present invention relates to a cartridge attached to the puncture device,
A housing;
A hub disposed inside the housing and having a puncture needle;
A base body which is provided so as to be fitted to the housing and has an engaging portion with which the hub is engaged;
It is characterized by providing.

  According to the present invention, the hub having the puncture needle is engaged with the base body via the engaging portion, and the base body is provided so as to be fitted to the housing. Therefore, the puncture needle does not protrude from the housing to the outside, and the cartridge can be handled safely.

  The hub has a plurality of engaging grooves facing the engaging portion and formed along the axial direction of the hub, and the hub moves between the plurality of engaging grooves. When the engaging portion is engaged with any of the above, the relative position along the axial direction between the hub and the base body can be easily changed and positioned.

  According to the present invention, the following effects can be obtained.

  That is, when the cartridge is mounted on the casing, the release means is relatively displaced with respect to the housing constituting the cartridge, so that the stopper means cannot be released from the displacement regulation state in which the displacement of the cartridge can be regulated. When the cartridge is removed from the casing and is to be mounted again, the displacement of the cartridge is restricted by the stopper means and mounting is reliably prevented. As a result, the used cartridge is not erroneously remounted on the puncture device, and hygiene problems and the like due to the use of the cartridge can be preferably avoided.

  In addition, since the hub having the puncture needle is engaged with the base body via the engaging portion, and the base body is provided so as to be freely fitted to the housing, the hub can be fitted to the housing when not in use. The puncture needle does not protrude to the outside, and the cartridge can be handled safely.

  Further, the hub has a plurality of engaging grooves formed along the axial direction, and the engaging portion of the base body moves between the plurality of engaging grooves, and the hub has one of the engaging grooves. By engaging the engaging portion, it becomes possible to determine the relative position of the hub and the base body, before mounting the cartridge (when not in use) and after detaching (after use), Since the needle tip is engaged and fixed at a position hidden inside the base body, the needle tip does not protrude from the housing to the outside, and erroneous puncture can be prevented.

  The puncture apparatus according to the present invention will be described in detail below with reference to the accompanying drawings by giving preferred embodiments in relation to the cartridge used therein.

  In FIG. 1, reference numeral 10 indicates a puncture device to which a cartridge according to an embodiment of the present invention is mounted.

  As shown in FIGS. 1 to 4A and 4B, the puncture device 10 includes a casing 12 formed of a bottomed cylindrical box, a hub holder 14 that is displaceably disposed in the casing 12, A cartridge 22 is provided which is detachably provided in an opening 16 provided at one end of the casing 12 and accommodates a hub 20 having a puncture needle 18.

  On the other end side of the casing 12, a puncture button 24 is tiltably provided on the side surface. The puncture button 24 extends substantially parallel to the side surface of the casing 12, and a pusher 26 protruding toward the side surface of the casing 12 is formed at one end portion thereof, and the other end portion thereof is opposed to the side surface of the casing 12. Are joined. In other words, the puncture button 24 is provided such that one end portion side having the pusher 26 can tilt with the other end portion as a fulcrum.

  Further, a button hole 28 that faces the pusher 26 of the puncture button 24 and an engagement hole 30 that is spaced from the button hole 28 toward the opening 16 (in the direction of arrow A) are formed on the side surface of the casing 12. The button hole 28 and the engagement hole 30 are opened in a substantially rectangular shape. When the puncture button 24 tilts with the other end as a fulcrum, the pusher 26 is inserted into the button hole 28. When the cartridge 22 is loaded in the casing 12, the protrusion 32 formed on the side surface of the cartridge 22 is engaged with the engagement hole 30.

  On the other hand, a guide wall 34 is provided in the casing 12 so as to be substantially perpendicular to the axis line on the other end side from the substantially central portion, and the guide wall 34 is provided with a hole 36 formed in the substantially central portion. Thus, the hub holder 14 is supported so as to be displaceable.

  The hub holder 14 includes a plate-like base portion 38 provided at one end side, a first flange 40 formed at the end portion of the base portion 38, and a direction away from the base portion 38 (arrow B direction). A shaft portion 42 extending from the first flange 40 and a second flange 44 provided at an end portion of the shaft portion 42 are included. Note that the first and second flanges 40 and 44 are formed to expand in the radially outward direction with respect to the shaft portion 42.

  The base portion 38 extends along the axial direction of the hub holder 14 in a direction away from the first flange 40 (arrow A direction), and has a constant width in a direction substantially perpendicular to the axial line. On the end side of the base portion 38, a pair of bulging portions 46 are provided on both side surfaces substantially orthogonal to the axis of the base portion 38. The bulging portion 46 protrudes from the both side surfaces of the base portion 38 in a substantially semicircular cross section by a predetermined amount, and is disposed at a position that is substantially symmetric about the axis of the base portion 38.

  In addition, the base portion 38 has a holding block 48 that swells in a substantially rectangular parallelepiped shape in the vicinity of the first flange 40, and a first portion that is recessed in a substantially arc shape in cross section near both ends of the holding block 48. The second bearing grooves 50 and 52 are provided, and a pair of pins 54 protruding from both side surfaces orthogonal to the axis of the hub holder 14 are provided between the first and second bearing grooves 50 and 52.

  A swinging hook (tilting member) 56 formed in a lattice shape is held by the holding block 48 so as to be swingable through the first bearing groove 50, and a pair of swinging hooks 56 is provided on the upper part of the swinging hook 56. A presser spring 58 is attached via the pin 54.

  The swing hook 56 includes a support shaft 60 provided at a substantially central portion, an engagement shaft 62 spaced apart from the support shaft 60 by a predetermined distance, and an end opposite to the engagement shaft 62 with the support shaft 60 as a center. And a hook portion 66 provided on a frame 64 provided on the portion. In the swing hook 56, the engaging shaft 62 and the frame 64 are arranged substantially in parallel with the supporting shaft 60 as a center, and both ends of the supporting shaft 60, the engaging shaft 62, and the frame 64 are set as a pair. They are connected by a connection frame 68 (see FIG. 3). That is, the pair of connection frames 68 are connected to the support shaft 60, the engagement shaft 62, and the frame 64 so as to be orthogonal to each other.

  The pair of connection frames 68 are formed in a V shape that is inclined at a predetermined angle toward the engagement shaft 62 side and the frame 64 side with the portion connected to the support shaft 60 as the center. In other words, when the swinging hook 56 is viewed from the axial direction of the support shaft 60, the support shaft 60, the engagement shaft 62, and the frame 64 are not arranged in a straight line.

  Further, the hook portion 66 protrudes so as to be substantially orthogonal to the frame 64, and a protrusion 70 facing the hub holder 14 when the swinging hook 56 is attached to the hub holder 14 is provided on the side surface of the hook portion 66. It is done. The protrusion 70 is formed in a substantially hemispherical shape protruding from the side surface of the hook portion 66 (see FIG. 4A).

  Then, the support shaft 60 constituting the swing hook 56 is inserted into the first bearing groove 50 of the holding block 48, and the engagement shaft 62 is disposed on the first flange 40 side (arrow B direction) in the hub holder 14. As a result, the swinging hook 56 swings at a predetermined angle between one end side having the hook portion 66 and the other end side having the engaging shaft 62 with the support shaft 60 inserted into the first bearing groove 50 as a fulcrum. The engaging shaft 62 is inserted into the second bearing groove 52 under the swinging action of the swinging hook 56.

  The presser spring 58 is formed of, for example, a thin plate-like metal material, and a main body having a substantially U-shaped cross section is mounted so as to cover a part of both side surfaces of the holding block 48, and is formed on the main body. The pin 54 of the holding block 48 is inserted into a set of pin holes 72 and fixed.

  The presser spring 58 includes a first presser portion 74 extending from the main body along the axial direction, and a second presser extending in the opposite direction (arrow B direction) to the first presser portion 74 with respect to the main body. And a presser part 76. The first and second pressing portions 74 and 76 are provided so as to be in contact with the side surface of the holding block 48 and tiltable in a direction away from the side surface with a portion joined to the main body as a fulcrum. That is, the 1st and 2nd presser parts 74 and 76 function as a leaf | plate spring which has the elasticity which can be tilted with respect to a main body. The first pressing portion 74 is disposed above the first bearing groove 50 in the holding block 48, and the second pressing portion 76 is disposed above the second bearing groove 52.

  As a result, the first and second presser portions 74, with the support shaft 60 of the swing hook 56 inserted into the first bearing groove 50 and the engagement shaft 62 inserted into the second bearing groove 52, The support shaft 60 and the engagement shaft 62 are held inside the first and second bearing grooves 50 and 52 by 76. As a result, the oscillating displacement of the oscillating hook 56 is restricted, and the one end side having the hook portion 66 is held tilted upward with the support shaft 60 as a fulcrum (see FIG. 5A).

  The first flange 40 of the hub holder 14 is provided with an elastic piece 78 extending toward the base portion 38 (in the direction of arrow A), and the elastic piece 78 is separated from the holding block 48 by a predetermined distance. 38, and is provided so as to be freely tiltable with a portion supported by the base portion 38 as a fulcrum.

  The shaft portion 42 is provided on the other end portion side of the hub holder 14, and is inserted into the hole portion 36 of the guide wall 34 and supported so as to be freely displaceable. A puncture spring 80 interposed between the first flange 40 and the guide wall 34 is inserted into the shaft portion 42 and interposed between the second flange 44 and the guide wall 34. The return spring 82 is inserted.

  The puncture spring 80 biases the hub holder 14 through the first flange 40 toward the opening 16 side (arrow A direction) of the casing 12, and the return spring 82 pushes the hub holder 14 through the second flange 44. It is biased in a direction away from the opening 16 (arrow B direction). That is, the puncture spring 80 and the return spring 82 are biased in opposite directions.

  The cartridge 22 includes a hollow housing 84 having both open ends, a hub base 86 fitted into the housing 84, and a puncture needle 18, and is displaceable with respect to the hub base (base body) 86. And a hub 20 to be held.

  One end of the housing 84 that is loaded into the casing 12 is formed in a shape corresponding to the opening 16 of the casing 12, and a protrusion 32 that engages with the engagement hole 30 is provided on a side surface of the housing 84. When the cartridge 22 including the housing 84 is loaded into the casing 12, the protrusion 32 is engaged with the engagement hole 30 to prevent the protrusion 22 from falling off when the cartridge 22 is attached to the casing 12. .

  On the other hand, the other end portion of the housing 84 is formed in a tapered shape in which the height direction and the width direction are smaller than the one end portion loaded in the puncture device 10. A housing hole 88 for housing the hub holder 14 and the hub 20 is formed in the housing 84 along the axial direction. The housing hole 88 has a height and width at one end side according to the outer shape of the housing 84. The other end portion side is formed small in the height and width directions. In addition, a set of stepped portions 89 is provided inside the accommodation hole 88 so as to face the frame 64 of the swing hook 56 (see FIG. 10C). The step portions 89 bulge from the inner wall surface of the accommodation hole 88 and are formed substantially parallel to each other, and are spaced apart from the center of the housing 84 by a predetermined distance.

  The hub base 86 includes a pair of arms 90a and 90b, and a guide portion 92 that connects the one arm 90a and the other arm 90b with a predetermined distance therebetween. The guide portion 92 is formed in a substantially U-shaped cross section.

  Each of the arms 90a and 90b has a predetermined length along the axial direction, and one end portion thereof is bent at a right angle so as to approach each other. A gap 94 is provided at one end of the bent arms 90a, 90b at a predetermined interval, and the puncture needle 18 of the hub 20 attached between the arms 90a, 90b can be inserted through the gap 94. Become.

  At the other end of the arms 90a and 90b, a pair of connection grooves 96 having a substantially semicircular cross section are formed on the inner wall surfaces facing each other, and the bulging portion 46 of the hub holder 14 is engaged with the connection grooves 96. . As a result, the hub base 86 including the pair of arms 90a and 90b and the hub holder 14 are connected (see FIGS. 7B and 8B).

  A plurality of connection plates 98 spaced apart by a predetermined distance are provided on the lower side of the arms 90a and 90b, and a pair of arms 90a and 90b are connected by the connection plates 98 (see FIG. 3). That is, the pair of arms 90a and 90b are integrally connected to each other by the guide portion 92 and the pair of connection plates 98 in a state of being spaced apart from each other at a substantially constant interval. The guide portion 92 is formed with an inclined surface 92a inclined at a predetermined angle so as to face the connection plate 98 (see FIG. 5A). The inclined surface 92a is one end portion from the other end side of the arms 90a, 90b. It is inclined downward gradually toward the side.

  In other words, the pair of arms 90a and 90b are provided such that portions not connected by the guide portion 92 and the connection plate 98 can be deformed in the width direction substantially orthogonal to the axis.

  Further, a substantially semi-circular convex portion (engaging portion) 100 is formed on the inner wall surfaces facing each other at substantially the center portions of the arms 90 a and 90 b (see FIG. 5B), and the convex portion 100 is formed on the hub holder 14. The hub 20 to be mounted is engaged with one of the first to third recesses (engagement grooves) 102, 104, 106.

  The hub 20 is formed in a plate shape having a substantially constant thickness. A puncture needle 18 projects from one end of the hub 20, and the other end is formed thinner than the one end. It has an oval hole 108 with which the hook portion 66 of the swinging hook 56 is engaged. The oblong hole 108 is formed to be long along the axial direction of the hub 20.

  Further, first and third recesses 102, 104, and 106 are provided on both side surfaces of the hub 20 at a predetermined interval along the axial direction, and the first to third recesses 102, 104, and 106 are It is formed to be recessed at substantially the same depth with respect to both side surfaces. The first to third recesses 102, 104, 106 are provided on both side surfaces on one end side of the hub 20, and the first recess 102 is disposed at a position closest to one end side of the hub 20, and the hub 20 The third recess 106 is disposed at a position on the other end side. The first and third recesses 102 and 106 are formed in a substantially semicircular cross section. On the other hand, the second concave portion 104 is disposed between the first concave portion 102 and the third concave portion 106, and the second concave portion 104 is formed in a semi-oval shape having a predetermined length along the axial direction. The first and third recesses 102 and 106 are disposed so as to be spaced apart from each other at equal intervals around the second recess 104.

  When the hub 20 is mounted inside the hub base 86, the convex portion 100 is engaged with any one of the first to third concave portions 102, 104, and 106.

  The puncture device 10 to which the cartridge 22 according to the embodiment of the present invention is mounted is basically configured as described above. Next, the cartridge 22 is mounted to the puncture device 10. Will be described. As shown in FIGS. 5A and 5B, the state in which the cartridge 22 is not attached to the casing 12 of the puncture apparatus 10 is defined as an initial state.

  In this initial state, the hub base 86 is fitted to the stepped portion 84a of the housing 84 constituting the cartridge 22, the relative displacement between the housing 84 and the hub base 86 is restricted, and the hub 20 The first concave portion 102 is engaged with the convex portion 100 of the hub base 86. That is, since the hub base 86 and the hub 20 are fixed inside the housing 84, the hub base 86 and the hub 20 do not fall out of the housing 84, and the puncture needle 18 is outside the housing 84. It does not protrude.

  On the other hand, in the puncture device 10, the hub holder 14 is pushed out toward the opening 16 (in the direction of arrow A) under the elastic action of the puncture spring 80, and the engagement shaft 62 of the swing hook 56 is held by the presser spring 58. The hook portion 66 is pressed toward the block 48 and tilted upward at a predetermined angle with respect to the holding block 48.

  From such a state, as shown in FIGS. 6A and 6B, a measurer (not shown) grips the cartridge 22 and inserts it into the opening 16 of the casing 12 from the other end side having the protrusion 32. Accordingly, the cartridge 22 is gradually inserted into the casing 12 in a state where the protrusion 32 is pushed inward by the inner wall surface of the casing 12. When the other end of the hub 20 abuts against one end of the hub holder 14, the hub holder 14 is pressed in a direction (arrow B direction) away from the opening 16 against the elastic force of the puncture spring 80. To be displaced. On the other hand, since the hub 20 is also pressed by the elastic force of the puncture spring 80 biased by the hub holder 14, it is pressed along the hub base 86 in the direction of arrow A. Therefore, the hub 20 is displaced and the second concave portion 104 is engaged with the convex portion 100. In other words, the hub 20 is in a state of being displaced relative to the hub base 86 fitted in the housing 84 by a predetermined distance toward one end of the hub base 86 (in the direction of arrow A).

  Further, the elastic piece 78 gets over the inclined protrusion adjacent to the button hole 28 under the displacement action of the hub holder 14 in the arrow B direction, and is tilted upward by the elastic force and inserted into the button hole 28. Thereby, the end of the elastic piece 78 is engaged with the inside of the button hole 28, and the hub holder 14 is restricted from being displaced in the axial direction in a state where the puncture spring 80 is compressed. In this case, the end of the elastic piece 78 is positioned opposite the puncture button 24 through the button hole 28.

  Further, the hook portion 66 of the swinging hook 56 is positioned above the oblong hole 108 of the hub 20 and abuts against the inclined surface 92 a of the guide portion 92 in the hub base 86.

  As shown in FIGS. 7A and 7B, the cartridge 22 is further pressed toward the casing 12 (in the direction of arrow B) and inserted into the casing 12, whereby the guide portion 92 of the hub base 86 is formed. The hook portion 66 of the swinging hook 56 is pushed downward along the inclined surface 92a, and the swinging hook 56 swings around the support shaft 60. That is, the swing hook 56 is displaced upward around the support shaft 60 so that the engagement shaft 62 overcomes the elastic force of the presser spring 58 and is separated from the second bearing groove 52. As a result, the second pressing portion 76 is pushed upward by the engaging shaft 62, and the convex portion 100 of the hook portion 66 that is in a substantially horizontal state is inserted into the oblong hole 108 of the hub 20. Thereby, the hub 20 and the hub holder 14 are connected via the swing hook 56.

  Further, the hub 20 is further displaced along the hub base 86 under the contact action with the hub holder 14 so that the convex portion 100 is engaged with the third concave portion 106, and the bulging portion 46 of the hub holder 14 is connected to the hub base 86. It is engaged with the connecting groove 96. As a result, the hub holder 14 and the hub base 86 are connected.

  Further, when the cartridge 22 is pressed toward the casing 12 and inserted into the casing 12, the hub base 86 is pushed out and displaced to release the fitting state between the hub base 86 and the housing 84. In other words, the hub base 86 can be displaced in the axial direction with respect to the housing 84.

  Then, the protrusion 32 of the cartridge 22 is inserted into the engagement hole 30 of the casing 12 so that the cartridge 22 is mounted inside the casing 12 constituting the puncture device 10 and can be punctured. It will be in a state (refer to Drawing 4A and Drawing 4B).

  In such a puncture preparation state, for example, a measurement person's skin (not shown) is pressed against the end of the cartridge 22, and the puncture button 24 is directed toward the casing 12 as shown in FIGS. 8A and 8B. By pressing and tilting, the elastic piece 78 is pressed by the puncture button 24 and the engaged state with the button hole 28 is released. As a result, the hub holder 14 is pushed out toward the cartridge 22 (in the direction of arrow A) by the elastic force of the puncture spring 80, and the hub 20 and the hub base 86 connected to the hub holder 14 are integrally displaced.

  Then, the puncture needle 18 of the hub 20 protrudes from the end of the housing 84 by a predetermined length through the accommodation hole 88 of the cartridge 22. Thereby, the puncture needle 18 punctures the skin of the measurement person, and blood is derived from the puncture site of the skin punctured by the puncture needle 18.

  In this puncture device 10, as shown in FIGS. 9A and 9B, the hub 20 having the puncture needle 18, the hub base 86, and the hub holder 14 are immediately separated from the skin by the elastic force of the return spring 82 (arrow B). The hub 20, the hub base 86, and the hub holder 14 are returned to a position where the elastic forces of the puncture spring 80 and the return spring 82 are balanced, and stopped.

  Next, the cartridge 22 is removed from the puncture apparatus 10 that has been punctured with the puncture needle 18. As shown in FIGS. 10A and 10B, for example, a measurer (not shown) grasps the end of the cartridge 22 and pulls it in a direction away from the casing 12 (in the direction of arrow A), whereby the protrusion 32 of the housing 84 is obtained. Is disengaged from the engagement hole 30 of the casing 12 and the hub base 86 is engaged with the stepped portion 84a of the housing 84 so as to be integrally displaced.

  In this case, since the protrusion 70 of the swing hook 56 is inserted into the oblong hole 108 of the hub 20, the hub holder 14 is displaced together with the hub 20, and the hub base 86 is pulled to the hub 20. Accordingly, the convex portion 100 engaged with the third concave portion 106 is engaged with the second concave portion 104 in a state of moving.

  Further, the hub base 86 is deformed in a direction in which the pair of arms 90 a and 90 b are separated from each other, so that the pair of connecting grooves 96 is detached from the bulging portion 46 of the hub holder 14, and the hub 20 is connected to the hub holder 14. The state is released. As shown in FIGS. 10B and 10C, the swing hook 56 swings around the support shaft 60 so that the hook portion 66 side (arrow A direction) is substantially horizontal. Does not abut against the stepped portion 89 of the housing 84 (see FIG. 10C).

  Then, as shown in FIGS. 11A and 11B, the cartridge 22 including the hub 20 is completely detached from the casing 12 of the puncture device 10, so that the swing hook 56 is moved under the elastic action of the presser spring 58. Since the engaging shaft 62 is pressed again and engaged with the second bearing groove 52 side by the two presser portions 76, the hook portion 66 swings and displaces upward. On the other hand, in the cartridge 22, the fitting state between the housing 84 and the hub base 86 is released, and the hub base 86 including the hub 20 is displaceable in the axial direction with respect to the housing 84. In this case, since the second concave portion 104 is engaged with the convex portion 100 of the hub base 86, the puncture needle 18 of the hub 20 is prevented from protruding from the end portion of the hub base 86 to the outside. .

  Next, a case where the used cartridge 22 used for puncture in this way is erroneously mounted on the puncture apparatus 10 will be described with reference to FIGS. 12A and 12B.

  The cartridge 22 once mounted on the puncture device 10 is gripped and inserted into the casing 12 through the opening 16. In this case, before the hook portion 66 of the swing hook 56 contacts the guide portion 92 of the hub base 86, the frame 64 of the swing hook 56 contacts the step portion 89 of the housing 84 (see FIG. 12C). Specifically, the hook portion 66 of the swinging hook 56 is not pushed downward by the inclined surface 92a of the guide portion 92, and the frame 64 is inclined upward as in the hook portion 66. It abuts against the stepped portion 89.

  As a result, the cartridge 22 including the housing 84 cannot be further displaced toward the inside of the casing 12, and the displacement is restricted.

  That is, as shown in FIGS. 5A and 5B, the hub base 86 is fitted to the stepped portion 84a of the housing 84, and is used as compared with the cartridge 22 that is not mounted (unused) to the puncture device 10. In the cartridge 22, the fitting state between the hub base 86 and the housing 84 is released, and the hub base 86 is displaceable with respect to the housing 84, so that the separation distance between the swing hook 56 and the hub base 86 is increased. It is getting bigger. As a result, when the cartridge 22 is inserted into the casing 12, the frame 64 contacts the stepped portion 89 before the hook portion 66 contacts the guide portion 92 of the hub base 86 (see FIG. 12C). In other words, the swing hook 56 functions as stopper means that can regulate the displacement of the cartridge 22. Further, the guide portion 92 functions as a release means that can swing the hook portion 66 of the swinging hook 56 toward the hub holder 14 and release the displacement restriction state of the cartridge 22 by the swinging hook 56.

  As a result, it is possible to reliably prevent the used cartridge 22 once used from being mounted on the puncture device 10 again, so that the used cartridge 22 is erroneously remounted on the puncture device 10. Thus, the occurrence of sanitary problems due to the use of the cartridge 22 can be reliably avoided.

  Further, in the cartridge 22 removed from the puncture device 10, the second concave portion 104 of the hub 20 is engaged with the convex portion 100 of the hub base 86, so that the puncture needle 18 moves from the end of the hub base 86 to the outside. Protruding is prevented. As a result, the cartridge 22 can be handled safely.

  It should be noted that the puncture device according to the embodiment of the present invention and the cartridge used in the puncture device are not limited to the above-described embodiment, and various configurations can be adopted without departing from the gist of the present invention. It is.

1 is an overall external perspective view of a puncture apparatus to which a cartridge according to an embodiment of the present invention is attached. It is the partial cross section perspective view which showed only the casing and housing of the puncture apparatus in FIG. 1 in the cross section. It is a disassembled perspective view of the puncture apparatus shown in FIG. 4A is a longitudinal sectional view showing a puncture preparation state of the puncture device of FIG. 1, and FIG. 4B is a transverse sectional view of a section orthogonal to the longitudinal section of FIG. 4A as viewed from below. 5A is a longitudinal sectional view showing a state before the cartridge is mounted on the puncture device of FIG. 4, and FIG. 5B is a transverse sectional view of a section orthogonal to the longitudinal section of FIG. 5A as viewed from below. 6A is a longitudinal sectional view showing a state in which a cartridge housing is inserted into the puncture device of FIG. 5, and FIG. 6B is a transverse sectional view of a section perpendicular to the longitudinal section of FIG. 6A as viewed from below. 7A is a longitudinal sectional view showing a state in which the housing of the cartridge in FIG. 6 is further inserted into the casing, and FIG. 7B is a transverse sectional view of the section orthogonal to the longitudinal section of FIG. It is. 8A is a longitudinal cross-sectional view showing a puncture state in which the puncture button is pushed by projecting the puncture button in the puncture device of FIG. 7, and FIG. 8B is a cross section orthogonal to the longitudinal cross section of FIG. It is a cross-sectional view. 9A is a longitudinal sectional view showing a state in which the puncture needle is pulled back by the return spring after puncturing is performed by the puncturing apparatus of FIG. 8, and FIG. 9B is a cross-sectional view perpendicular to the longitudinal section of FIG. 9A. It is the cross-sectional view seen from. FIG. 10A is a longitudinal sectional view showing a state in which the cartridge is pulled in the direction of detachment from the puncture device after the puncture operation is completed in the puncture device of FIG. 9, and FIG. 10B is orthogonal to the longitudinal section of FIG. 10A. FIG. 10C is a cross-sectional view taken along line XX in FIG. 10B. 11A is a longitudinal cross-sectional view showing a state where a used cartridge is taken out from the puncture device of FIG. 10 and completely removed, and FIG. 11B is a cross-sectional view perpendicular to the vertical cross-section of FIG. FIG. 12A is a longitudinal sectional view showing a state in which a used cartridge is to be remounted on the puncture device of FIG. 11, and FIG. 12B is a cross-sectional view perpendicular to the longitudinal section of FIG. 12A as viewed from below. FIG. 12C is a cross-sectional view taken along line XII-XII in FIG. 12B.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Puncture apparatus 12 ... Casing 14 ... Hub holder 18 ... Puncture needle 20 ... Hub 22 ... Cartridge 24 ... Puncture button 30 ... Engagement hole 32 ... Protrusion 34 ... Guide wall 46 ... Expansion part 48 ... Holding block 56 ... Swing hook 58 ... Presser spring 66 ... Hook part 70 ... Projection part 78 ... Elastic piece 80 ... Puncture spring 82 ... Return spring 84 ... Housing 86 ... Hub base 90a, 90b ... Arm 92 ... Guide part 100 ... Convex part 102 ... First concave part 104 ... 2nd recessed part 106 ... 3rd recessed part 108 ... oblong hole

Claims (6)

In a puncture device used by mounting a cartridge provided with a puncture needle that can advance and retreat in the axial direction,
A casing having an opening;
A cartridge having a housing and a hub provided with the puncture needle and provided inside the housing; and a cartridge mounted to the opening of the casing;
Stopper means provided inside the casing and capable of regulating displacement of the cartridge relative to the casing;
Release means provided in the cartridge, for releasing the displacement restriction state of the cartridge by the stopper means;
With
When the cartridge is attached to the puncture device, the release means releases the displacement restriction state by the stopper means and is relatively displaced along the axial direction with respect to the housing, while being detached from the puncture device. The puncture apparatus according to claim 1, wherein when the cartridge is remounted, the release means cannot release the displacement restricted state by the stopper means. The puncture device according to claim 1, wherein
The stopper means is provided such that, when the cartridge is inserted from the opening of the casing, one end side in the mounting direction of the cartridge can be brought into contact with a step provided in the cartridge. Puncture device to do. The puncture device according to claim 1 or 2,
The stopper means is composed of a tilting member provided so as to be tiltable with a support shaft supported by the casing as a fulcrum, and the tilting member is pressed by the release means at one end in the mounting direction of the cartridge. The puncture apparatus is characterized in that the cartridge is tilted and displaced, and the displacement regulation state of the cartridge is released. The puncture device according to claim 1 or 2,
The release means includes a base body that is provided inside the housing and has an engaging portion that engages with the hub, and the cartridge is attached to the casing in a state where the base body and the housing are fitted. A puncture device characterized in that when mounted, one end of the stopper means is pressed to release the displacement restriction state. In the cartridge attached to the puncture device,
A housing;
A hub disposed inside the housing and having a puncture needle;
A base body which is provided so as to be fitted to the housing and has an engaging portion with which the hub is engaged;
A cartridge comprising: The cartridge according to claim 5, wherein
The hub has a plurality of engaging grooves facing the engaging portion and formed along the axial direction of the hub, and the engaging portion is engaged with any of the engaging grooves. Thus, the relative position along the axial direction of the hub and the base body is changed.

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