JP6278336B2 - Puncture device - Google Patents

Description

  The present invention relates to a puncture device used to puncture skin and collect a small amount of blood, and more particularly to a puncture device that can be used repeatedly by exchanging a lancet.

  Sometimes it is necessary to collect a small amount of blood for medical purposes. For example, a diabetic patient needs to collect his / her own blood in order to periodically check the blood glucose level (blood glucose self-measurement: SMBG). Conventionally, a puncture device has been used so that such blood self-collection can be performed safely and reliably.

  Such a puncture device is generally configured to puncture a puncture body provided at the tip of the lancet by projecting it from the housing by urging a lancet accommodated in the housing with a spring member. Specifically, as described in Japanese Patent Application Laid-Open No. 2011-67565 (Patent Document 1), a lancet is inserted from a front end opening of the housing and pushed in, thereby compressing and deforming a spring member disposed at the back of the housing. The puncture needle protrudes from the housing by the urging force of the spring member and is punctured by the operation of the patient.

  Incidentally, in Patent Document 1, in order to prevent a needle stick accident before mounting on the housing, the needle (puncture body) is held in an immovable state so that the needle tip is not exposed to the outside, and is attached to the housing. There has been proposed a lancet (puncture needle cartridge 105) in which the needle is movable in the distal direction after mounting. That is, as shown in FIGS. 3 to 5 of Patent Document 1, the lancet body (203) is provided with a first arm (209) and a second arm (210), and a member extending between the arms ( 214), and when mounted on the housing, the second arm (210) is deformed by the base mechanism (102) provided on the housing, and the puncture needle (207) is movable in the distal direction. It has come to be.

  However, in the structure of Patent Document 1, the first arm and the second arm sandwich the opening end (214) of the puncture needle holder (201) in the puncture direction, so that the lancet body is in front of and behind the puncture needle holder. Therefore, it is necessary to provide the first arm and the second arm before and after the puncturing direction. Therefore, at the time of puncturing operation, the first arm and the second arm are in sliding contact with the inner peripheral surface of the puncture needle holder, thereby increasing the frictional resistance. As a result, in order to realize the puncture operation against the frictional resistance force, it is necessary to employ a spring member having a larger elasticity, and unnecessary force is required for attaching the lancet or performing the puncture operation. If the second arm is caught on the inner peripheral surface of the puncture needle holder, there is a possibility that normal puncture operation cannot be realized.

  Further, in Patent Document 1, when the puncture needle cartridge is set in the puncture device main body (101), the first arm is pushed into the inner peripheral side by the base mechanism provided in the puncture device main body, and the first arm and The engagement of the puncture needle holder is released. However, in such a first arm disengagement mechanism, the end surface of the cylindrical base mechanism is merely in contact with the first arm in the puncture direction and guided to the inner peripheral side. There is also a possibility that the disengagement operation is not realized stably.

JP 2011-67565 A

The present invention has been made in the background of the above-mentioned circumstances, and the problem to be solved is to prevent the puncture body from being exposed in the single lancet before use and to realize an efficient puncture operation of the puncture body. An object of the present invention is to provide a puncture device having a novel structure.

  Hereinafter, the aspect of this invention made | formed in order to solve such a subject is described. In addition, the component employ | adopted in each aspect as described below is employable by arbitrary combinations as much as possible.

  According to a first aspect of the present invention, there is provided a puncture device in which a lancet accommodated in a housing is urged by a spring member, and a puncture body provided at a distal end portion of the lancet is projected from the housing to perform a puncture operation. Is provided with a hub fixed to the puncture body and a protector that is externally attached to the hub, and the hub is provided with an elastic locking piece that extends to the outer peripheral side and opens to the peripheral wall of the protector. The end of the elastic locking piece is locked in the locking hole so that the hub is held at the initial position in the rearward direction of the puncture, and a release protrusion projects from the inner peripheral surface of the housing When the lancet is inserted from the front end opening of the housing, the release protrusion enters the first lock hole, and the lock of the elastic lock piece to the first lock hole is released. The hub is in the puncture preparation position That it has to be a lifting been punctured standby state, characterized.

  According to the puncture device having the structure according to the first aspect as described above, in the lancet alone, the elastic locking piece is locked in the first locking hole, so that the puncture body and the hub are protected from the protector. Thus, the puncture body is not exposed to the outside of the protector, and it is avoided that the finger or the like is accidentally damaged by the puncture body. Moreover, in order to position the puncture body and the hub and the protector so as not to move, it is not always necessary to provide a plurality of elastic locking pieces in the puncturing direction, and the frictional resistance during the puncturing operation is reduced by a small number of elastic locking pieces, A smooth puncturing operation can also be realized.

  Further, when the lancet is mounted on the housing, a release protrusion provided on the inner peripheral surface of the housing is inserted into the first locking hole of the protector, so that the elastic locking piece and the first locking hole are locked. Is to be canceled. As a result, the lancet is simply mounted on the housing, and without any special operation, the puncture body shifts to a puncture standby state in which relative displacement of the puncture body with respect to the protector is allowed, and blood can be collected easily. it can. In addition, since the release protrusion protruding toward the inner peripheral side of the housing is inserted into the first locking hole, the release of the locking between the elastic locking piece and the first locking hole is realized with high reliability. . In addition, since the release protrusion enters the first locking hole, the protector is prevented from being detached from the housing.

  According to a second aspect of the present invention, in the puncture device described in the first aspect, after the puncture operation, the hub is held in a re-use prevention position different from that before use with respect to the protector. .

  According to the second aspect, the hub is held at different positions with respect to the protector before and after puncturing. As a result, even if the lancet after puncturing is attached to the housing and used again, the elastic locking piece is held in the locked state with the protector, so that the puncturing operation does not occur. Therefore, the reuse of the used lancet is mechanically prevented, and infection can be prevented.

  According to a third aspect of the present invention, in the puncture device described in the second aspect, the protector has a second wall that opens at a position spaced forward in the puncture direction with respect to the first locking hole. A locking hole is formed so that the end of the elastic locking piece is locked to the second locking hole after the puncturing operation so that the hub is held at the reuse prevention position forward in the puncturing direction. It is a thing.

  According to the third aspect, after the puncturing operation, the elastic locking piece is locked in the second locking hole of the protector, and the puncture body and the hub are positioned in the front-rear direction with respect to the protector. The body can be prevented from being exposed to the outside from the protector.

  According to a fourth aspect of the present invention, in the puncture device described in the third aspect, the forward direction in the puncture direction is increased between the first locking hole and the second locking hole in the protector. A restricting projection is provided which gradually increases the protruding height toward the inner peripheral side, and extends gradually inclining outward toward the rear in the puncture direction.

  According to the fourth aspect, at the time of puncturing operation, the elastic locking piece passes through the opening of the second locking hole in a state where the elastic locking piece is pushed into the inner peripheral side by the restriction protrusion, so that the elastic locking piece is The target puncture operation is reliably realized without being caught in the second locking hole. On the other hand, when the puncture body and the hub are pulled rearward after the puncturing is completed, the elastic locking piece enters the second locking hole and is locked by the rear end of the elastic locking piece coming into contact with the restriction projection. . Accordingly, it is possible to reliably prevent reuse while realizing a target puncture operation.

  In addition, since the elastic locking piece extends obliquely outward toward the rear in the puncturing direction, even if the elastic locking piece moves while sliding on the inner peripheral surface of the protector during the puncturing operation, the elastic locking piece The piece is not easily caught on the inner peripheral surface of the protector, and a smooth operation is realized. In addition, the frictional resistance between the elastic locking piece and the protector does not act to open the elastic locking piece to the outside, and an increase in the frictional resistance is avoided.

  According to a fifth aspect of the present invention, in the puncture device described in any one of the first to fourth aspects, a plurality of the elastic locking pieces are evenly provided on the circumference of the hub, A plurality of the first locking holes are provided at positions corresponding to the elastic locking pieces on the circumference of the protector.

  According to the fifth aspect, during the puncturing operation, the plurality of elastic locking pieces are in sliding contact with the inner peripheral surface of the protector evenly on the circumference, so that the hub is prevented from being tilted with respect to the protector and stabilized. The puncture operation is realized, and pain at the time of puncture due to blurring of the puncture body is reduced.

  In addition, the elastic locking piece is locked at a plurality of positions on the circumference with respect to the first locking hole, so that the puncture body and the hub are stably positioned with respect to the protector. Prevents needle stick accidents with high reliability.

A sixth aspect of the present invention, in the puncture device described in the first to fifth any one aspect of the hub in which is accommodated in the protector over the entire length.

  According to the sixth aspect, the puncture body and the hub are protected by the protector, so that durability and reliability can be improved.

  In addition, in a used lancet, the hub is housed in the protector over a substantial length, so that the hub can be externally used even if it is forced to return to the position before use with respect to the protector. It is difficult to operate from the beginning, and it takes much time and effort to return it to a reusable state. Therefore, reuse of the lancet can be avoided more effectively, and safety can be ensured.

  According to a seventh aspect of the present invention, in the puncture device according to any one of the first to sixth aspects, an engagement portion that protrudes outward toward the protector at an end of the elastic locking piece Is provided, and the engaging portion is locked in the first locking hole of the protector.

  According to the seventh aspect, the engagement portion is formed to protrude from the rear end portion of the elastic locking piece, so that the elastic locking piece is stably locked with respect to the first locking hole. Therefore, the positioning and holding of the hub and the protector in the lancet alone can be realized stably.

  According to an eighth aspect of the present invention, in the puncture device described in any one of the first to seventh aspects, the housing has a structure in which a cylindrical protector holder is accommodated in a hollow housing body. The release protrusion protrudes from the inner peripheral surface of the protector holder.

  According to the eighth aspect, since the lancet is accommodated in the protector holder separate from the housing, the support structure of the lancet, the release protrusion, etc. can be provided on the protector holder with a high degree of freedom, and the housing The material, shape, etc. can be freely set without being limited by the support structure of the lancet.

  According to a ninth aspect of the present invention, in the puncture device described in any one of the first to eighth aspects, the peripheral wall of the housing is provided with a flexible piece that is allowed to bend and deform toward the outer periphery. And the release protrusion protrudes from the flexible piece.

  According to the ninth aspect, when the lancet is inserted and accommodated in the housing, it is possible to prevent the release protrusion from escaping to the outer periphery due to the flexible piece being bent to the outer periphery, and the release protrusion being caught by the protector. Moreover, when the release protrusion reaches the opening position of the first locking hole, the release protrusion is inserted into the first locking hole based on the elasticity of the flexible piece, and the elastic locking piece and the first locking hole are inserted. The locking of the hole is released.

  According to a tenth aspect of the present invention, in the puncture device described in any one of the first to ninth aspects, an output member connected to the hub is accommodated in the housing. An operation member exposed to an outer surface is provided, and the lancet connected to the output member by accommodating the output member and the operation member by housing the lancet in the housing is connected to the puncture preparation position. On the other hand, by operating the operating member to release the locking to the output member, the puncture body connected to the output member is projectingly displaced by the spring member and puncturing is performed. It was made to do.

  According to the tenth aspect, the reusable housing is provided with the means for holding the elastic force of the spring member by locking and the means for releasing the locking and allowing the puncture operation by the elastic force of the spring member. Thus, the structure of the lancet that is made disposable can be simplified. As a result, the lancet can be easily manufactured and the cost can be reduced.

  According to the present invention, in the lancet before use, the elastic locking piece of the hub fixed to the puncture body is locked in the first locking hole of the protector, so that the hub and the protector are relative to each other in the puncturing direction. The puncture body is accommodated and held by the protector. Therefore, when handling the lancet before use, it is possible to avoid the fingers from being damaged by the puncture body.

The perspective view which shows the puncture device as one Embodiment of this invention. The top view of the puncture device shown in FIG. The front view of the puncture device shown in FIG. Sectional drawing which shows the internal structure of the puncture device shown in FIG. The top view of the puncture apparatus main body which comprises the puncture device shown in FIG. The front view of the puncture apparatus main body shown in FIG. VII-VII sectional drawing of FIG. The disassembled perspective view of the puncture apparatus main body shown in FIG. The perspective view of the lancet which comprises the puncture device shown in FIG. Sectional drawing which shows the internal structure of the lancet shown in FIG. FIG. 10 is an exploded perspective view of the lancet shown in FIG. 9. The top view of the lancet shown in FIG. The front view of the lancet shown in FIG. XIV-XIV sectional drawing of FIG. It is a longitudinal cross-sectional view explaining the usage method of the puncture device shown in FIG. 1, Comprising: The figure which shows the state before mounting | wearing a puncture apparatus main body with a lancet. It is a longitudinal cross-sectional view explaining the usage method of the puncture device shown in FIG. 1, Comprising: The figure which shows the process in which a lancet is mounted | worn with the puncture apparatus main body. It is a longitudinal cross-sectional view explaining the usage method of the puncture device shown in FIG. 1, Comprising: The figure which shows the puncture standby state which mounted | wore the puncture apparatus main body with the lancet. It is a longitudinal cross-sectional view explaining the usage method of the puncture device shown in FIG. 1, Comprising: The figure which shows the state which removed the cap from the hub. It is a longitudinal cross-sectional view explaining the usage method of the puncture device shown in FIG. 1, Comprising: The figure which shows the moment of puncture. It is a longitudinal cross-sectional view explaining the usage method of the puncture device shown in FIG. 1, Comprising: The figure which shows the state in which the puncture needle was accommodated in the protector after puncture. It is a longitudinal cross-sectional view explaining the usage method of the puncture device shown in FIG. 1, Comprising: The figure which shows the process of removing a used lancet from a puncture apparatus main body. The longitudinal cross-sectional view which expands and shows the principal part of the state which attached the used lancet to the puncture apparatus main body.

  Embodiments of the present invention will be described below with reference to the drawings.

  1-4 show a puncture device 10 as an embodiment of the present invention. The puncture device 10 has a structure in which a lancet 14 is detachably attached to a puncture device body 12. In the following description, unless otherwise specified, the axial direction refers to the left-right direction in FIG. 2 that is the central axis direction of the puncture device body 12 and the lancet 14, and the projection direction (puncture direction) of the puncture needle 114 described later 2 in FIG. 2 is referred to as the front and the right is referred to as the rear.

  More specifically, the puncture device main body 12 shown in FIGS. 5 to 8 includes a housing 16, and the housing 16 includes a housing main body 18 and a protector holder 20. The housing body 18 is a substantially cylindrical member made of a hard resin molded product, and an operation window 22 is opened in the peripheral wall. In addition, as shown in FIG. 8, the housing main body 18 of this embodiment combines a pair of substantially halved bodies, and these halves are fixed to each other by means such as ultrasonic welding. It is formed with.

  As shown in FIG. 7, the protector holder 20 is a substantially cylindrical part made of a resin molded product, and an opening locking portion 24 that protrudes to the outer periphery is integrally formed at the front end. Further, four guide grooves 26 extending continuously in the axial direction are formed on the inner peripheral surface of the protector holder 20, and are arranged uniformly on the circumference.

  Further, four flexible pieces 28 are formed on the circumferential wall portion of the protector holder 20 at equal intervals on the circumference. The flexible piece 28 has a substantially rectangular plate shape, and one front side is integrally connected to the peripheral wall of the protector holder 20 and the other three sides are independent of the peripheral wall of the protector holder 20 by cutting. . Accordingly, the rear end portion of the flexible piece 28 can be moved to the outer peripheral side with deformation, and the flexible piece 28 is allowed to bend and deform toward the outer peripheral side.

  Furthermore, the engaging protrusion 30 is formed in each flexible piece 28 of the protector holder 20. The engaging protrusion 30 is a protrusion that protrudes toward the inner periphery of the protector holder 20, and extends with a predetermined width in the circumferential direction of the protector holder 20 with a substantially constant semicircular cross section. The engaging protrusion 30 is formed integrally with the rear end of the flexible piece 28, and the protruding tip of the engaging protrusion 30 moves in the radial direction of the protector holder 20 due to the bending deformation of the flexible piece 28. It is possible.

  The protector holder 20 is accommodated in the front opening portion of the housing body 18. That is, a pair of support protrusions 32, 32 protruding from the outer peripheral surface of the protector holder 20 are inserted into the support recesses 34, 34 formed on the inner peripheral surface of the housing body 18, and the opening relationship of the protector holder 20. The protector holder 20 is positioned and held in the opening portion of the housing body 18 by the stop portion 24 being superimposed on the opening end face of the front side of the housing body 18. Thus, the protector holder 20 is attached to the opening part of the housing main body 18, and the housing 16 of this embodiment is comprised.

  Further, in a state where the protector holder 20 is attached to the housing body 18, the rear end portion of the flexible piece 28 including the engagement convex portion 30 is against the relief recess 36 that opens on the inner peripheral surface of the housing body 18. These are positioned, and deformation of the flexible piece 28 to the outer peripheral side is allowed.

  Further, the housing 16 accommodates an output rod 38 as an output member. The output rod 38 has a substantially cylindrical shape as a whole, and has a bifurcated shape in which a front portion is divided into upper and lower portions (up and down in FIG. 7) by the slit 40. Further, a first lock protrusion 42 and a second lock protrusion 44 are formed on the front portion of the output rod 38 having a bifurcated shape. Each of the first and second locking protrusions 42 and 44 has a substantially right-angled triangular cross section, the front surface extends in a direction substantially perpendicular to the axis, and the rear surface extends inwardly toward the rear. , And are arranged at a predetermined distance from each other in the axial direction. In the present embodiment, the pair of first and second lock protrusions 42 and 44 of the output rod 38 are formed so as to protrude vertically, and when the output rod 38 is accommodated in the housing 16, the output rod 38 It is not necessary to specify the vertical direction of 38, and the assembling work is facilitated. For example, the first and second lock protrusions 42 and 44 on the lower side can be omitted.

  Further, a pair of connecting convex portions 46 are provided at the front end of the output rod 38. The connecting convex portions 46, 46 protrude in a vertically-inwardly facing manner at the front end of the bifurcated output rod 38, and have a curved shape in which the front end portion is inclined upward and downward outward.

  Furthermore, a rod abutting portion 48 is provided behind the connecting convex portion 46 in the output rod 38. The rod abutting portion 48 is formed with a pair of vertically opposed projections at the front end portion of the bifurcated output rod 38, and a convex curved surface whose rear surface is gradually inclined forward toward the projecting tip. Has been.

  On the other hand, an enlarged diameter contact portion 50 having a large diameter is provided at the rear end of the output rod 38, and an annular step is formed at the front end of the enlarged diameter contact portion 50.

  A push rod 52 is inserted into the output rod 38. The push rod 52 has a substantially cylindrical shape with a small diameter, and a pair of push-out portions 54 and 54 projecting forward from both sides in the width direction (vertical direction in FIG. 5) are provided at the tip portion. It has been. The push rod 52 is inserted through the output rod 38 and protrudes rearward from the output rod 38, and the pair of push-out portions 54 and 54 protrude laterally through the slit 40 of the output rod 38.

  Further, a puncture spring 56 as a spring member is externally inserted into the push rod 52. The puncture spring 56 is a coil spring and is externally inserted into the rear end portion of the push rod 52 protruding rearward from the output rod 38 and the front end is inserted into the diameter-enlarging contact portion 50 of the output rod 38. Thus, it is in contact with the output rod 38 in the axial direction.

  Further, a discharge switch 58 is attached to the rear end of the push rod 52. The discharge switch 58 has a substantially bottomed cylindrical shape, and the rear end of the push rod 52 is inserted into and fixed to the discharge switch 58. Further, the rear end of the puncture spring 56 is inserted into the discharge switch 58 and abuts in the axial direction, and the puncture spring 56 is sandwiched between the output rod 38 and the discharge switch 58 in the axial direction.

  The discharge switch 58 is inserted through the setting dial 60. The setting dial 60 has a substantially cylindrical shape as a whole. A discharge switch 58 is inserted through the rear end opening, and a front portion is inserted into the housing body 18. Further, a large-diameter engaging portion 62 that protrudes to the outer periphery is provided over the entire periphery of the setting dial 60 into the housing main body 18. The large-diameter engaging portion 62 is inserted into an engaging groove 64 opened on the inner peripheral surface of the housing main body 18 and locked in the axial direction, so that the setting dial 60 is axially moved with respect to the housing main body 18. And is supported in a state in which relative rotation is allowed. The discharge switch 58 is movable back and forth with respect to the setting dial 60, and is prevented from coming out rearward in the axial direction.

  In addition, a spacer 66 is extrapolated at an intermediate portion of the output rod 38. The spacer 66 has a substantially cylindrical shape, and a flange-like spring contact portion 74 is provided at the front end portion so as to protrude from the outer periphery.

  A pressing spring 80 is disposed behind the spacer 66. The pressing spring 80 is a coil spring having a diameter larger than that of the puncture spring 56, and is externally inserted at the rear end of the output rod 38 and the rear portion of the spacer 66. The spring contact portion 74 of the spacer 66 and the discharge switch Between the axial direction of 58, it arrange | positions in the state compressed previously. Thus, the spacer 66 is urged forward by the pressing spring 80 and pressed against the projecting piece 82 protruding from the inner peripheral surface of the housing main body 18 in the axial direction. It is positioned.

  The housing body 18 is provided with a recovery spring 86. The recovery spring 86 is a coil spring, and is externally inserted between the first lock protrusion 42 and the second lock protrusion 44 of the output rod 38 and formed on the inner periphery of the housing body 18. The housing portion 88 is disposed. The accommodating portion 88 includes a peripheral wall portion that can position the recovery spring 86 in the direction perpendicular to the axis, and front and rear support wall portions 90a and 90b having insertion holes 92 through which the output rod 38 can be inserted on both sides in the axial direction. It has. Note that the insertion hole 92a formed through the front support wall 90a does not allow the first and second lock projections 42 and 44 to pass therethrough, and the insertion hole 92a formed through the rear support wall 90b. The second locking projection 44 can pass through the hole 92b.

  Further, a ring member 94 is disposed between the rear support wall 90 and the rear end of the recovery spring 86. The ring member 94 has a substantially annular plate shape, and is externally inserted between the first lock protrusion 42 and the second lock protrusion 44 in the output rod 38. The center hole of the ring member 94 has a cross-sectional shape through which the first and second lock protrusions 42 and 44 cannot be inserted so that the second lock protrusion 44 is locked. Since the output rod 38 has a bifurcated shape at the portion where the second lock protrusions 42 and 44 are formed, the output rod 38 can be inserted into the ring member 94 by being bent so as to approach vertically. .

  An operation member 96 is attached to the operation window 22 formed in front of the accommodating portion 88 in the housing body 18. The operation member 96 includes an operation button 98 exposed to the outside from the operation window 22 and a positioning piece 100 that is integrally formed with the operation button 98 and extends forward and backward. The operation member 96 includes a plate-like lock piece 102. The lock piece 102 extends downward from the front portion of the operation button 98, the intermediate portion is formed as an inclined portion 104 that is gradually inclined downward, and both front and rear end portions extend in a substantially axial direction. Yes. Furthermore, a contact recess 106 is formed in the rear end portion of the inclined portion 104 so as to open to the lower surface at the center portion in the width direction. The contact recess 106 is a guide surface in which the front portion of the bottom surface extends substantially in the axial direction, and the rear portion of the bottom surface gradually tilts rearward, so that the first lock protrusion 42 can be inserted. Has been.

  The operation member 96 includes a positioning piece 100 inserted through the operation window 22 and superimposed on the inner peripheral surface of the housing main body 18, and a support shaft 108 attached to the housing main body 18 and a front portion of the lock piece 102. Is supported from below. The support shaft 108 has a small-diameter columnar shape, and both end portions in the axial direction are supported by the housing body 18 and extend in the width direction. A lock piece 102 of the operation member 96 is superimposed on the support shaft 108 from above, and the front end of the inclined portion 104 is supported by the support shaft 108. Accordingly, when the operation button 98 is pressed, the lock piece 102 tilts about the support shaft 108, and the rear end of the lock piece 102 is displaced upward with respect to the output rod 38. Yes. In addition, the rear end of the lock piece 102 is located between the first lock protrusion 42 and the second lock protrusion 44 in the single body of the puncture device main body 12 to which the lancet 14 is not attached. The protrusion 42 is inserted into the contact recess 106.

  On the other hand, the lancet 14 is configured by combining a lancet body 110 and a protector 112 as shown in FIGS. As shown in FIG. 14, the lancet body 110 has a structure in which a puncture needle 114 as a puncture body is substantially entirely covered with a hub 116 and a cap 118 that are integrally formed of resin.

  The hub 116 is fixed to the proximal end portion of the puncture needle 114 and protrudes rearward from the puncture needle 114. Further, an annular connecting groove 120 that opens to the outer peripheral surface is formed at the rear end of the hub 116.

  Further, the hub 116 is provided with a pair of elastic locking pieces 122 and 122. The elastic locking piece 122 has a longitudinal plate shape as a whole, extends vertically from the vicinity of the front end of the hub 116, and curves and protrudes rearward. Further, the elastic locking pieces 122 are gradually inclined upward and downward toward the rear, and in this embodiment, the front end portion serving as the base end is curved in a substantially arc shape in the thickness direction, and the tip and The rear end portion is an inclined flat plate shape. In the present embodiment, since the pair of elastic locking pieces 122 and 122 are provided above and below the hub 116, the elastic locking pieces 122 and 122 are evenly arranged on the circumference of the hub 116.

  Furthermore, an engaging portion 124 that protrudes upward and downward is integrally formed at the rear end of the elastic locking piece 122. The engaging portion 124 has a front surface that extends in a direction substantially perpendicular to the axis, and a rear surface that is inclined so as to incline backward toward the upper and lower outer sides.

  The cap 118 covers the distal end portion of the puncture needle 114 and is integrally formed with the hub 116 via the fragile portion 125. The fragile portion 125 is thinned by an annular groove that opens to the outer peripheral surface. When an external force is applied when the cap 118 is removed, the stress concentrates and breaks preferentially. The cap 118 is provided with a closing portion 126 having a large-diameter disk shape at the distal end portion, and a pair of substantially semicircular discs are crossed in the axial direction on the distal end side of the closing portion 126. A grip portion 128 having a combined shape is integrally formed. Further, the grip portion 128 is integrally formed with an arrow 130 as a marking portion extending in the circumferential direction. The arrows 130 are respectively formed between the circumferential directions of the four plate portions constituting the grip portion 128, and indicate that the cap 118 may be rotated in any circumferential direction when the cap 118 described later is removed. Therefore, arrows 130a and arrows 130b opposite to each other are alternately arranged on the circumference.

  Furthermore, a fitting convex portion 132 that protrudes rearward is formed on the closing portion 126 of the cap 118. The fitting convex portion 132 has a substantially cylindrical shape, and is a first inclined surface 134 whose rear end surface is inclined with respect to the direction perpendicular to the axis. The first inclined surface 134 is configured by a substantially uniformly inclined plane, and the rear end portion of the cap 118 having a small diameter protrudes rearward from the central portion of the first inclined surface 134. Yes.

  The protector 112 is attached to the lancet body 110 having such a structure in an extrapolated state. The protector 112 has a substantially cylindrical shape as a whole, and the rear end portion is divided into four parts by forming four cuts 136 extending in the axial direction at equal intervals on the circumference. In addition, a positioning projection 138 that protrudes to the outer peripheral side is provided continuously at the axially intermediate portion of the protector 112 over the entire circumference. Further, behind the positioning protrusion 138 in the protector 112, guide protrusions 140 protruding in the outer peripheral side and extending in the axial direction are formed at four positions on the periphery.

  A pair of first locking holes 142 and second locking holes 144 are formed behind the positioning protrusions 138 in the protector 112. The first locking hole 142 and the second locking hole 144 are rectangular holes that have substantially the same shape and open to the peripheral wall of the protector 112, and are arranged at a predetermined distance in the axial direction. The locking hole 144 is located in front of the first locking hole 142. Further, the pair of first locking holes 142, 142 and the pair of second locking holes 144, 144 are formed at positions that oppose each other in the radial direction, and mounting the lancet body 110, which will be described later, to the protector 112. In the state, the first and second locking holes 142 and 144 are arranged at positions corresponding to the elastic locking pieces 122 on the circumference. In addition, the inner surface of the second locking hole 144 is configured by an inclined surface in which a portion located rearward is gradually inclined forward toward the inner peripheral side. In the present embodiment, the first locking hole 142 and the second locking hole 144 are formed between the circumferential directions of the guide protrusions 140 adjacent in the circumferential direction.

  Furthermore, between the axial direction of the 1st locking hole 142 and the 2nd locking hole 144, the control protrusion 146 which protrudes toward an inner peripheral side is formed. The restricting protrusion 146 is a protrusion whose protrusion height gradually increases toward the front, and both the front surface and the inner peripheral surface are gradually inclined toward the inner peripheral side toward the front. Further, the front surface of the restricting projection 146 is continuous with the rear inner surface of the second locking hole 144, and in the present embodiment, these surfaces are configured by a single inclined plane. The protruding height of the restricting protrusion 146 is set in consideration of the elasticity of the elastic locking piece 122, the moving speed of the lancet body 110 during puncturing, the axial dimension of the second locking hole 144, and the like. It is desirable that the engaging portion 124 that has passed over the restricting protrusion 146 can move forward without entering the second locking hole 144 during a puncturing operation described later.

  Further, the protector 112 is formed with a fitting window 148 having a shape corresponding to the first locking hole 142. The fitting window 148 is formed at substantially the same circumference as the first locking hole 142 and at a position away from the first locking hole 142, and is opposed to the pair of first locking holes 142, 142. A pair is arrange | positioned so that it may oppose in the radial direction one direction substantially orthogonal to a direction.

  Further, a fitting recess member 150 is disposed at the front end of the protector 112. The fitting concave member 150 has a concave shape that opens forward, and the bottom surface thereof is a second inclined surface 152 corresponding to the first inclined surface 134 of the cap 118. Further, a hole through which the cap 118 is inserted is formed through the bottom wall portion of the fitting recess member 150. The fitting recessed member 150 is fixed by means such as welding or adhesion in a state where it is inserted into the front end portion of the protector 112, and substantially constitutes a part of the protector 112.

  Then, the lancet body 110 is inserted into the protector 112, the fitting convex portion 132 of the cap 118 is fitted into the fitting concave portion 150 of the protector 112, and the engaging portion 124 of the elastic locking piece 122 is inserted. The first locking hole 142 is inserted and locked. Accordingly, the lancet body 110 including the puncture needle 114 is positioned and held at the initial position in the puncture direction rear side with respect to the protector 112, and the lancet 14 is configured.

  In the positioning and holding state of the lancet body 110 and the protector 112 at the initial positions, the puncture needle 114 and the hub 116 of the lancet body 110 are both accommodated on the inner peripheral side of the protector 112 over the substantially entire length. Preferably, in the lancet body 110, at least the tip of the puncture needle 114 is always housed in the inner periphery of the protector 112, and the connecting groove 120 of the hub 116 is always housed in the inner periphery of the protector 112. The puncture needle 114 and the hub 116 are always accommodated in the protector 112 over substantially the entire length.

  The lancet 14 having such a structure is attached to the puncture device body 12 when the puncture device 10 is used. That is, as shown in FIG. 15, the lancet 14 is brought close to the puncture device body 12 from the front, and the lancet 14 is inserted into the front end opening of the puncture device body 12. By inserting the lancet 14 into the distal end opening of the puncture device main body 12, the bifurcated front end portion of the output rod 38 is pushed open by the rear end portion of the hub 116 as shown in FIG. The connecting projection 46 provided at the front end is inserted into the connecting groove 120 of the hub 116 and engaged in the axial direction. Thereby, the lancet body 110 and the output rod 38 are coupled so as to move integrally in the axial direction.

  Further, by further pushing the lancet 14 backward, as shown in FIG. 17, the output rod 38 moves rearward and the puncture spring 56 is compressed in the axial direction. Further, the first locking protrusion 42 moves while pushing up the locking piece 102 and is positioned rearward of the locking piece 102, so that the front end of the first locking protrusion 42 is relative to the rear end of the locking piece 102. And is locked in the axial direction. Thereby, the forward movement of the output rod 38 is restricted by the lock piece 102 and the puncture spring 56 is held in a compressed state. As a result, in the mounted state of the lancet 14 shown in FIG. 17, the output rod 38 and the lancet body 110 connected thereto are held at the puncture preparation position where the forward biasing force is exerted by the elasticity of the puncture spring 56. .

  Further, the protector 112 of the lancet 14 pushes the flexible piece 28 to the outer peripheral side as shown in FIG. 16 by abutting the rear end portion of the protector 112 on the protector holder 30 of the housing 16. It is inserted into the protector holder 20 while spreading. Then, when the lancet 14 is further pushed in and the engaging convex portion 30 is moved to the opening portion of the first locking hole 142, the engaging convex portion is caused by the elasticity of the flexible piece 28 as shown in FIG. 30 enters the first locking hole 142 and is locked in the axial direction. In addition, the engaging projection 30 is inserted into the fitting window 148 and locked in the axial direction. Accordingly, the protector 112 is axially positioned with respect to the protector holder 20 and attached to the housing 16.

  Furthermore, when the engaging convex portion 30 is inserted into the first locking hole 142, the engaging portion 124 of the elastic locking piece 122 is pushed inward by the engaging convex portion 30 to be engaged. The locking between the portion 124 and the first locking hole 142 is released. Thereby, the positioning of the lancet body 110 and the protector 112 is released, and the lancet body 110 is allowed to be displaced relative to the protector 112 in the axial direction. As is clear from this, the release protrusion of the present embodiment is constituted by the two engaging protrusions 30, 30 inserted into the first locking holes 142, 142. In addition, if the front surface of the engaging portion 124 is an inclined surface that is inclined rearward toward the upper and lower outer sides, the engaging portion 124 can be smoothly removed from the first locking hole 142. Note that the term “unlocking” as used herein means that the operation button 98 is pressed to enable puncturing, and the engaging portion 124 of the elastic locking piece 122 is completely removed from the first locking hole 142. In addition to the state where the locking is released and the locking is released, the locking between the engaging portion 124 and the first locking hole 142 is weakened from the initial state, in other words, the locking area is reduced, A state in which the engaging portion 124 is easily detached from the first locking hole 142 is also included.

  In the present embodiment, the guide protrusions 140 protruding from the outer peripheral surface of the protector 112 are inserted into the guide grooves 26 opened in the inner peripheral surface of the protector holder 20, so that the lancet 14 is attached to the housing 16. While being positioned in the circumferential direction, it is inserted in the axial direction.

  Puncturing with the puncture needle 114 of the lancet 14 is performed in a state where the lancet 14 is mounted on the puncture device body 12 in this way. Hereinafter, the puncturing operation of the puncture device 10 will be described with reference to FIGS.

  First, as shown in FIG. 18, in the puncture device 10 in which the lancet 14 is attached to the puncture device body 12, the cap 118 of the lancet body 110 is removed from the hub 116 to expose the tip of the puncture needle 114. Thereby, the lancet body 110 is brought into the puncture standby state in which the lancet body 110 is held at the puncture preparation position while being urged forward by the puncture spring 56.

  The method of removing the cap 118 from the hub 116 is not particularly limited, and the fragile portion 125 may be torn off by applying an axial tensile force. However, in this embodiment, the grip portion 128 is gripped and the cap 118 is surrounded. By rotating in the direction, an axial component force is generated by the guiding action of the first inclined surface 134 and the second inclined surface 152, and this component force is applied to the fragile portion 125 in the axial direction. By acting as a tensile force, the fragile portion 125 is broken and the cap 118 is removed. Further, the puncture needle 114 is accommodated on the inner peripheral side of the protector 112 in a state where the cap 118 is removed, thereby preventing the user from touching the tip of the puncture needle 114 by mistake.

  Next, the rear end of the lock piece 102 is displaced away from the output rod 38 by pressing the operation button 98 of the operation member 96 while the tip of the lancet 14 (the protector 112) is applied to the skin of the puncture portion of the patient. Thus, the engagement between the rear end of the lock piece 102 and the first lock protrusion 42 is released. Accordingly, as shown in FIG. 19, the output rod 38 is displaced forward based on the urging force of the puncture spring 56, and the puncture needle 114 projects forward from the distal end opening of the protector 112, and instantaneously touches the patient's skin. Is punctured.

  Further, when the output rod 38 moves forward, the ring member 94 is pressed forward by the second lock protrusion 44 of the output rod 38, and when the ring member 94 moves forward, the recovery spring 86 is compressed in the axial direction. The As a result, a rearward biasing force based on the elasticity of the recovery spring 86 is exerted on the output rod 38 at the time of puncturing.

  When the puncture is completed, the output rod 38 is displaced rearward by the urging force of the recovery spring 86 as shown in FIG. 20, and the puncture needle 114 is quickly accommodated in the inner periphery of the protector 112.

  In this case, the lancet body 110 after the completion of puncturing is held at a reuse prevention position ahead of the initial position without returning to the initial position before puncturing. That is, when the output rod 38 and the lancet body 110 are moved rearward from the puncture position by the rearward urging force due to the elasticity of the recovery spring 86, the engagement of the elastic locking piece 122 of the lancet body 110 as shown in FIG. The joining portion 124 enters and is locked in the second locking hole 144 without returning to the first locking hole 142. Thereby, the lancet body 110 is positioned and held in the axial direction with respect to the protector 112 in a state where the lancet body 110 is positioned forward as compared to before the puncturing operation. In the present embodiment, the restriction projection 146 is formed between the first locking hole 142 and the second locking hole 144, and the engaging portion 124 comes into contact with the front surface of the restriction projection 146, so that the first The second locking hole 144 enters the first locking hole 142 without returning to the first locking hole 142.

  In such a reuse prevention position, when the used lancet is mounted on the housing 16, the lancet body 110 is positioned forward of the puncture before the puncture. The engaging part 124 does not contact. Therefore, the lancet body 110 remains strongly held by the protector 112, and the lancet body 110 does not move in the distal direction even when the lancet body 110 is pressed from the base end side. Furthermore, in the present embodiment, the lancet body 110 and the output rod 38 connected thereto are positioned in front of the puncture body, so that the first lock protrusion 42 is in front of the rear end of the lock piece 102. positioned. In short, the output rod 38 is substantially at the same position as the single body state of the puncture device body 12 before the lancet 14 is mounted, and the urging force by the puncture spring 56 is not acting on the output rod 38. Therefore, even if the operation button 98 is pressed again after puncturing, the puncturing operation does not occur.

  Next, as shown in FIG. 21, the discharge switch 58 is pushed forward, and the push rod 52 is moved forward relative to the output rod 38. Accordingly, the front end of the push rod 52 is inserted between the rod contact portions 48, 48 of the output rod 38, and the front end portion of the output rod 38 is deformed so as to be separated vertically. The fitting with the connecting concave groove 120 of 116 is released.

  Further, by pushing the push rod 52 forward, the pushing portion 54 is inserted into the notch 136 of the protector 112 and is brought into contact with the rear end of the protector 112 at the portion where the notch 136 is formed. As a result, a forward force is exerted on the protector 112 to release the engagement between the engagement convex portion 30 and the first engagement hole 142 and the fitting window 148, and the protector 112 is applied to the protector holder 20. Is pushed forward relatively. As a result, the used lancet 14 'is discharged from the lancing device body 12 and discarded. When the lancet 14 'is caught without being ejected from the puncture device main body 12 with the protector 112 and the protector holder 20 unlocked, the protector 112 can be grasped and removed with fingers or the like. In this case as well, since the tip of the puncture needle 114 is accommodated in the protector 112, there is no possibility that the finger or the like is damaged by the puncture needle 114.

  Here, in the puncture device 10 of this embodiment, the reuse of the used lancet 14 'is prevented. That is, in the used lancet 14 ′, as shown in part A of FIG. 22, the engaging portion 124 of the elastic locking piece 122 is inserted into the second locking hole 144, and the lancet body 110 is used. It is located in front of the protector 112 compared to before. Thereby, even if the used lancet 14 ′ is inserted from the front end opening of the puncture device main body 12 and pushed backward, the engaging portion 124 of the elastic locking piece 122 does not contact the engaging convex portion 30 of the housing 16, Does not enter puncture standby state. Further, as shown in part B of FIG. 22, the output rod 38 cannot be moved backward so that the front surface of the first lock projection 42 and the rear surface of the lock piece 102 cannot be locked, and the puncture spring 56 is compressed. Can no longer hold on. Therefore, the output rod 38 cannot be displaced forward by the elastic restoring force of the puncture spring 56, and the puncture operation as described above cannot be established. When the used lancet 14 ′ is erroneously attached to the puncture device main body 12, the used lancet 14 ′ can be detached from the puncture device main body 12 by pushing the discharge switch 58.

  As described above, according to the puncture device 10 of the present embodiment, the relative position between the lancet body 110 and the protector 112 changes before and after puncturing, and the used lancet 14 ′ is inserted into the puncture device. It is impossible to set the main body 12 and puncture again. Therefore, by preventing re-puncture, problems such as infectious diseases can be avoided and hygienic use can be realized.

  In addition, the elastic locking pieces 122 that are in sliding contact with the inner peripheral surface of the protector 112 at the time of puncturing are provided with a pair of upper and lower portions, and the frictional resistance due to the sliding contact of the elastic locking pieces 122 is reduced, so that the puncturing Efficiency of operation is achieved. Further, since the pair of elastic locking pieces 122 and 122 are provided symmetrically in the vertical direction, the sliding of the elastic locking piece 122 with respect to the protector 112 prevents the hub 116 and the puncture needle 114 from moving. The pain at the time of puncture can be reduced. In addition, by arranging the pair of elastic locking pieces 122 and 122 evenly on the circumference, the number of formed elastic locking pieces 122 is reduced as much as possible while realizing a balanced sliding contact with the protector 112. The material for forming the hub 116 including the elastic locking pieces 122 can be reduced.

  Moreover, the elastic locking piece 122 extends rearward while inclining outward, and the elastic locking piece 122 is brought into sliding contact with the inner peripheral surface of the protector 112 during the puncturing operation, and frictional resistance acts. As a result, the elastic locking piece 122 is not deformed so as to open upward and downward. Therefore, further increase in frictional resistance due to deformation of the elastic locking piece 122 is avoided.

  Accordingly, in the puncture device 10 of the present embodiment, the mechanism for preventing the reuse of the used lancet 14 ′ is realized with a structure that minimizes the influence on the puncture operation, and an efficient puncture operation, The improvement of safety by preventing the reuse is achieved at the same time.

  Further, the protector 112 is made sufficiently long, and in the lancet 14 before use, the puncture needle 114 and the hub 116 are accommodated in the protector 112 over substantially the entire length. Therefore, the hub 116 and the puncture needle 114 fixed thereto are protected by the protector 112, and damage to the hub 116 and the puncture needle 114 is avoided.

  Moreover, in the used lancet 14 ′ from which the cap 118 has been removed, the lancet body 110 is accommodated in the inner periphery of the protector 112 over the entire length. Displacement is considered extremely difficult. Therefore, by any chance, in the used lancet 14 ′, the elastic locking piece 122 is pushed inward to release the locking with the second locking hole 144, while the lancet body 110 is not used with respect to the protector 112. Even if the position is forcibly moved, such work is very time-consuming, and the reuse of the used lancet 14 'is more effectively prevented.

  The housing 16 of the puncture device 10 is configured by assembling a separate protector holder 20 to the housing body 18. As a result, the protector holder 20 can be freely set in shape, elasticity, etc. required for switching between holding and releasing of the protector 112, and is exposed to the outside on the housing main body 18 with fingers. The necessary weather resistance, erosion resistance, etc. can be set in consideration of handling in

  Further, when the engagement portion 124 of the elastic locking piece 122 and the first locking hole 142 are locked, when the lancet 14 is attached to the puncture device body 12, the engagement convex portion 30 of the protector holder 20 is the first. By being inserted into the locking hole 142, it is released with high reliability. Furthermore, the engaging convex part 30 of the protector holder 20 is supported by the flexible piece 28, and when the protector 112 is inserted, the flexible piece 28 is deformed to the outer peripheral side, and the engaging convex part 30 escapes to the outer peripheral side. Thus, the protector 112 is inserted to a predetermined position without being caught by the engaging convex portion 30. In this embodiment, the relief recess 36 provided in the housing main body 18 is located on the outer peripheral side of the flexible piece 28, and the deformation of the flexible piece 28 toward the outer peripheral side is caused to contact the housing main body 18. And is allowed by the escape recess 36.

  Further, since a restricting projection 146 is formed between the first locking hole 142 and the second locking hole 144 in the protector 112 so as to protrude toward the inner peripheral side, the hub 116 is a recovery spring after puncturing. When the rearward movement is performed by the elastic force 86, the rear end of the elastic locking piece 122 comes into contact with the restriction protrusion 146. As a result, the engaging portion 124 of the elastic locking piece 122 surely enters the second locking hole 144, and the hub 116 is positioned and held at the reuse prevention position. In addition, since the front surface of the restricting projection 146 is an inclined surface that is gradually inclined forward toward the inner periphery, when the rear end of the elastic locking piece 122 comes into contact with the restricting projection 146, the engaging portion 124. Is positively guided to the second locking hole 144. In this embodiment, the rear end surface of the elastic locking piece 122 that contacts the front surface of the restricting protrusion 146 is also an inclined surface corresponding to the front surface of the restricting protrusion 146, and the guiding action is more effectively exhibited. It is like that.

  Further, at the time of puncturing operation in which the hub 116 moves forward with respect to the protector 112, the elastic locking piece 122 is pushed into the inner peripheral side as the engaging portion 124 gets over the restricting protrusion 146. As a result, the engaging portion 124 of the elastic locking piece 122 does not enter the second locking hole 144 disposed in front of and adjacent to the restricting protrusion 146, and extends further forward than the second locking hole 144. Since it is reliably moved, the reliability of the puncture operation can be improved. In addition, since the inner peripheral surface of the restricting protrusion 146 is inclined so that the protruding height toward the inner peripheral side increases as going forward, the engaging portion 124 is caught by the inner peripheral surface of the restricting protrusion 146. Without fail, the stability of the operation is ensured.

  As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited by the specific description. For example, in the above-described embodiment, an example in which a pair of elastic locking pieces 122 and 122 and a pair of first and second locking holes 142 and 144 are provided has been described. For example, three or more 122 may be provided on the circumference. In that case, the first and second locking holes 142 and 144 are formed in a number corresponding to the elastic locking pieces 122.

  Furthermore, the elastic locking pieces 122 are desirably arranged evenly on the circumference, but are not limited, and may be provided on the circumference or only partially.

  The first locking hole 142 can also be formed with a slit shape or the like opened at the rear end of the protector 112.

  In the embodiment, the relative positional relationship (initial position) between the hub 116 and the protector 112 in the lancet 14 before being set in the puncture device main body 12, and the hub in the lancet 14 in the puncture standby state set in the puncture device main body 12. 116 and the protector 112 have the same relative positional relationship (puncture preparation position). For example, when the lancet 14 is set on the puncture device main body 12, the hub 116 is moved relative to the protector 112. Alternatively, it may be held after being relatively displaced to the puncture preparation position.

10: Puncture device, 12: Puncture device body, 14: Lancet, 16: Housing, 18: Housing body, 20: Protector holder, 28: Flexible piece, 30: Engaging projection (release protrusion), 38: Output rod (Output member), 96: operation member, 112: protector, 116: hub, 122: elastic locking piece, 124: engagement portion, 142: first locking piece, 144: second locking piece, 146 : Restriction protrusion

Claims (10)

In the puncture device that urges the lancet accommodated in the housing with a spring member and causes the puncture body provided at the distal end portion of the lancet to project from the housing and perform the puncture operation,
The lancet includes a hub fixed to the puncture body, and a protector that is externally attached to the hub, and the hub is provided with an elastic locking piece that extends to the outer peripheral side and opens to the peripheral wall of the protector. The end of the elastic locking piece is locked in one locking hole so that the hub is held at the initial position in the puncturing direction, and
A release projection is provided on the inner peripheral surface of the housing, and when the lancet is inserted from the front end opening of the housing, the release projection enters the first locking hole and the elastic locking piece A puncture device, wherein the locking to the first locking hole is released and the hub is in a puncture standby state in which the hub is held at the puncture preparation position.   The puncture device according to claim 1, wherein the hub is held in a reuse prevention position different from that before use with respect to the protector after a puncture operation.   A second locking hole is formed on the peripheral wall of the protector, and the second locking hole is opened at a position away from the first locking hole in the puncturing direction. The end of the elastic locking piece is formed after the puncturing operation. The puncture device according to claim 2, wherein the hub is held in a reuse prevention position forward in the puncture direction by being locked in the second locking hole.   Between the first locking hole and the second locking hole in the protector, there is provided a regulating projection that gradually increases in height toward the inner periphery as it goes forward in the puncturing direction, The puncture device according to claim 3, wherein the puncture device extends obliquely outward toward the rear in the puncture direction.   The plurality of elastic locking pieces are provided evenly on the circumference of the hub, and the plurality of first locking holes are provided at positions corresponding to the elastic locking pieces on the circumference of the protector. The puncture device according to any one of claims 1 to 4. The puncture device according to any one of claims 1 to 5, wherein the hub is housed in the protector over the entire length.   An engaging portion that protrudes outward toward the protector is provided at an end of the elastic locking piece so that the engaging portion is locked in the first locking hole of the protector. The puncture device according to any one of claims 1 to 6.   The said housing is made into the structure which accommodated the cylindrical protector holder in the hollow housing main body, The said cancellation | release protrusion is protrudingly provided in the inner peripheral surface of this protector holder. The puncture device as described.   9. The flexible wall according to claim 1, wherein the peripheral wall of the housing is provided with a flexible piece that is allowed to bend and deform toward the outer periphery, and the release protrusion protrudes from the flexible piece. Puncture device. An output member connected to the hub is accommodated in the housing, and an operation member exposed to an outer surface of the housing is provided, and the output member and the operation member are accommodated by accommodating the lancet in the housing. While the members are locked together and the hub connected to the output member is held in the puncture ready position,
10. The puncture body connected to the output member is protruded and displaced by the spring member by operating the operation member to release the locking to the output member, so that the puncture operation is performed. The puncture device according to any one of the above.

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