JP2006055190A - Puncturing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce pains at the time of puncturing, and at the same time, to easily perform the adjustment of the puncturing depth and the puncturing force without accompanying pains, in a puncturing device of which the puncturing depth and the puncturing force of a puncturing element to the skin can be adjusted. <P>SOLUTION: This puncturing device X1 is used for puncturing the puncturing element 11 to the skin by moving the puncturing element 11 in the puncturing direction N1. The puncturing device X1 is equipped with an adjusting member 50 which can adjust the puncturing depth of the puncturing element 11 to the skin by moving the puncturing element 11 in the puncturing or retracting direction N1 or N2. The puncturing device X1 is constituted in such a manner that the force to puncture the puncturing element 11 to the skin can be adjusted when the adjusting member 50 is moved in the puncturing or retracting direction N1 or N2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a puncture device used to pierce skin with a puncture element such as a lancet for the purpose of collecting blood or other body fluid or tissue for examination.

  The puncture device is generally configured to puncture the skin by moving the lancet together with the lancet holder by the elastic force of a spring. In such a puncture device, there is also proposed an assembly configured such that the user can adjust the puncture depth of the lancet with respect to the skin and adjust the blood collection amount and pain during puncture (see, for example, Patent Documents 1 and 2). ).

  In general, in a puncture device in which the puncture depth can be adjusted, a spring for applying a forward force to the lancet is relatively easy so that puncture can be performed properly even when the puncture depth is set large. Those that can obtain a large puncture force are employed. Therefore, when the puncture depth is set to be small, the puncture force is increased despite the small puncture depth, and the user is forced to suffer.

  On the other hand, in addition to the function of adjusting the puncture depth, there is also a puncture device to which a function of adjusting the puncture force when piercing the lancet into the skin is added (for example, see Patent Document 3). In such a puncture device, the user's pain at the time of puncture is reduced by the user adjusting the puncture force. However, the puncture device disclosed in the exemplified literature is to adjust the puncture depth by rotating the nosepiece and adjusting the position of the nosepiece, while rotating the sleeve and selecting the position of the barrier. It is configured to adjust the resilience stored in the spring and thus the puncture force. In other words, the operation required for adjusting the puncture depth is different from the operation required for adjusting the puncture force, and the user can change both the puncture depth and the puncture force. Two parts need to be manipulated to adjust. When there are two parts to be operated, it is necessary to perform a number of trials while repeatedly adjusting the two parts in order to find a combination of puncture depth and puncture force that is convenient for the user. For this reason, as a pre-stage for using the puncture device, pain is imposed for adjusting the puncture depth and puncture force. Such pain is only once when repeated punctures at the same location, but when changing the puncture site, it is necessary to adjust the puncture depth and puncture force. Be strong.

Japanese National Patent Publication No. 10-508527 International Publication No. 97/4707 Pamphlet Special table 2003-507113 gazette

  The present invention provides a puncture device capable of adjusting the puncture depth and puncture force of the puncture element with respect to the skin, while reducing pain during puncture and easily adjusting the puncture depth and puncture force without causing pain. It is an issue to be able to do it.

  In the present invention, the puncture device for moving the puncture element in the puncture direction from the standby position toward the puncture position and piercing the puncture element into the skin, the puncture direction or the direction opposite to the puncture direction In the puncture device provided with the adjustment member capable of adjusting the depth of puncture of the puncture element with respect to the skin by moving in the retraction direction, the adjustment member is moved in the puncture or retraction direction. A puncture device is provided, wherein the puncture device is configured such that the force for piercing the puncture element against the skin is adjusted.

  In a preferred embodiment, the puncture element is placed on the skin when the puncture depth is set relatively small compared to when the puncture depth with respect to the skin is set relatively large. It is comprised so that the piercing force may become small.

  The puncture device of the present invention further includes an elastic member whose amount of expansion / contraction changes in the puncture or retract direction when the position of the adjustment member is changed, for example.

  The elastic member is configured to apply a force for moving the puncture element in the puncture direction when the puncture element is pierced into the skin, for example.

  The puncture device according to the present invention is configured to include, for example, a housing that accommodates a puncture element and an elastic body, and a moving body that moves inside the housing to move the puncture element. In this case, the elastic body is connected to the adjustment member and the moving body, for example.

  The adjusting member is screwed into, for example, a housing, and can be moved in the puncturing or retracting direction by rotating around an axis along the puncturing and retracting direction. In this case, the adjusting member includes, for example, a cylindrical portion that is screwed into the housing and partially protrudes from the housing in the puncturing direction, and a support portion to which the elastic member is connected. The cylindrical portion is configured as a portion that is brought into contact with the skin when the puncture element is pierced into the skin, for example, and that is operated when the adjustment member is moved in the puncturing or retracting direction with respect to the housing.

  The adjustment member includes, for example, a first movable element including a cylindrical portion, and a second movable element formed as a separate body from the first movable element and including a support portion, and the first and first One of the two movable elements has a concave portion extending in a direction inclined with respect to the puncturing and retracting direction, while the other movable element has a convex portion movable inside the concave portion. Configured as In this case, when the cylindrical member is rotated around the axis, the adjustment member moves the inside of the recess, and the first movable element is the second movable element in the direction along the axis. Is configured to move relative to the puncturing or retracting direction.

  Preferably, the first movable element is configured to be movable relative to the housing in a direction along the axis and to be rotatable about the axis, while the second movable element is configured to be rotatable relative to the housing. , And is movable in the direction along the axis and not rotatable about the axis.

  The puncture device of the present invention is configured to further include, for example, an additional moving body that moves integrally with the puncture element and that can move in the puncture or retraction direction in conjunction with the movement of the movable body. In this case, the puncture device stores the elastic force for moving the puncture element in the elastic member by moving the movable body in the puncture direction, while moving the movable body in the retraction direction. It is preferable that the additional moving body is configured to move at least in the puncturing direction.

  The elastic member can also be configured to apply a force that moves the puncture element in the retracting direction before and after the puncture element pierces the skin. In this case, the puncture device according to the present invention further includes a driven member that moves in the direction opposite to the adjustment member in order to expand and contract the elastic member, for example, when the adjustment member is moved relatively in the puncture or withdrawal direction. It is configured as a provision.

  The puncture device according to the present invention includes a housing that contains a puncture element and an elastic body, and a moving body that moves within the housing to move the puncture element. In this case, the elastic body is disposed, for example, between the locking portion of the driven member and the locking portion of the moving body.

  For example, when the moving body moves in the puncturing direction, the housing is configured to have a stopper portion that interferes with the locking portion of the moving body in order to limit the movement of the moving body in the puncturing direction.

  The adjustment member, for example, is screwed into the housing so that a part thereof protrudes in the puncturing direction, and can be moved in the puncturing or retracting direction by rotating around an axis along the puncturing and retracting direction. Is done. In this case, the portion of the adjustment member that protrudes from the housing is a portion that comes into contact with the skin when the puncture element is pierced into the skin, and is a portion that is operated when the position of the adjustment member is changed.

  One member of the adjustment member and the driven member has a recess extending in a direction inclined with respect to the puncture direction, for example, while the other member is, for example, a protrusion that can move inside the recess. It is supposed to have. In this case, in the puncture device, for example, when the adjustment member is rotated around the axis, the convex portion moves inside the concave portion, and the driven member is connected to the adjustment member in the direction along the axis. Are configured to move in the opposite direction.

  The driven member is accommodated inside the adjusting member, for example, and is supported so as to be movable in the puncturing and retracting directions with respect to the housing.

  One element of the housing and the driven member is provided with, for example, a concave portion extending in the puncturing and retracting direction, while the other element thereof has, for example, a convex portion that moves within the concave portion. Is provided. In this case, the puncture device is configured to limit the rotation of the driven member around the axis by moving the convex portion into the concave portion.

  Hereinafter, the present invention will be specifically described as first to third embodiments with reference to the drawings.

  First, a first embodiment of the present invention will be described with reference to FIGS.

  The puncture device X1 shown in FIG. 1 and FIG. 2 is used to move the lancet 1 in the puncture direction N1 to pierce the skin and to drain blood from the skin. The puncture device X1 includes a housing 2, a lancet moving mechanism 3, a latch release member 4, and a puncture depth adjusting mechanism 5.

  The lancet 1 is for puncturing the skin as described above, and is held by the lancet holder 32 described later and moved by the lancet holder 32. The lancet 1 has a form in which a puncture needle 11 protrudes from a main body 10 and is configured as a disposable, for example. The main body 10 is formed in a columnar shape from resin or the like. The puncture needle 11 is made of metal, for example, and is insert-molded with respect to the main body portion 10.

  The housing 2 defines a space for accommodating various elements, and has a protruding portion 20 and first and second openings 21 and 22. The protrusion 20 is for locking the moving plate 31 in the lancet moving mechanism 3. The first opening 21 is for allowing the operation unit 31 </ b> B to move in the moving plate 31. The second opening 22 is for allowing movement of the pressing portion 42 in the latch release member 4. A female screw portion 23 is provided on the inner surface of the distal end portion of the housing 2. The female screw portion 23 is for screwing the adjustment member 50 of the puncture depth adjustment mechanism 5.

  The lancet moving mechanism 3 includes a link member 30, a moving plate 31, and a lancet holder 32. The lancet moving mechanism 3 is configured to convert the reciprocating motion of the moving plate 31 into the reciprocating motion of the lancet holder 32 through the circular motion of the link member 30.

  As shown in FIGS. 3 and 4, the link member 30 is for moving the lancet holder 32 in conjunction with the movement of the moving plate 31 when it moves. The link member 30 includes a first movable pin 30a, a second movable pin 30b, a fixed pin 30c, a first arm member 30A, and a second arm member 30B.

  The first movable pin 30a is engaged with the moving plate 31 and connects the first and second arm members 30A and 30B. More specifically, the first movable pin 30a connects the end portions 30Ab, 30Bb of the first and second arm members 30A, 30B to each other at the end portions 30Aa, 30Ba of the first and second arm members 30A, 30B. It is fixed in a misaligned state.

  The second movable pin 30b engages with the lancet holder 32, and protrudes in the opposite direction to the first movable pin 30a at the end 30Ab of the first arm member 30A.

  The fixing pin 30 c is for fixing the link member 30 to the housing 2 so as to be rotatable, and serves as a rotation center of the link member 30. The fixed pin 30c protrudes in the opposite direction to the first movable pin 30a at the end 30Bb of the second arm member 30B.

  In the link member 30, the pins 30a to 30c are connected to each other via the first and second arm members 30A and 30B. As a result, the positional relationship between the pins 30a to 30c is defined. More specifically, the first and second movable pins 30a and 30b have the same distance to the fixed pin 30c, while the second movable pin 30b is on the circumference around the fixed pin 30c. The first movable pin 30a is displaced by 45 degrees. Therefore, if the link member 30 is rotated with the fixed pin 30c as the center of rotation, the first and second movable pins 30a and 30b perform a circular motion around the fixed pin 30c.

  As shown in FIG. 6, the moving plate 31 is movable in the puncturing and retracting directions N1, N2 with respect to the housing 2, and an adjustment member 50 in the puncture depth adjusting mechanism 5 described later (see FIG. 2). Are connected to each other via a coil spring 39. The moving plate 31 has a groove 31A, an operation part 31B, and a hook part 31C.

  The groove 31 </ b> A is for allowing the movement of the first movable pin 30 a in the link member 30. The groove 31A has an inclined groove part 31Aa extending in a direction inclined with respect to the puncturing and retracting directions N1 and N2, and a linear groove part 31Ab connected to both ends of the inclined groove part 31Aa. As can be seen from FIGS. 6C and 6D, the first movable pin 30a can move the inclined groove 31Aa at least when the lancet 1 moves from the standby position to the puncture position, while FIG. ) And FIG. 6A, the linear groove 31Ab is moved at least when the lancet 1 moves in the retracting direction N2 from the puncture position. In the moving plate 31 in which such a groove 31A is formed, when the link member 30 is rotated in the clockwise direction in the drawing, the free position (top dead center) and the latch position are taken while the link member 30 rotates once. It reciprocates around (fixed pin 30c) between (bottom dead center).

  As shown in FIGS. 1 and 2, the operation unit 31B is used when the moving plate 31 is manually moved. A part of the operation portion 31B protrudes to the outside through the first opening 21 of the housing 2, and the first opening 21 is allowed to move in the puncture and retraction directions N1 and N2.

  The hook portion 31 </ b> C is for engaging the protruding portion 20 of the housing 2 to latch the moving plate 31 in the housing 2. As shown well in FIG. 6B, the moving plate 31 is configured such that the hook portion 31C is positioned on the retreat direction N2 side with respect to the protruding portion 20 when the coil spring 39 is in a contracted state. . On the other hand, as shown in FIG. 6A, the moving plate 31 is extended in the state where the hook portion 31C is engaged with the protruding portion 20, and is biased toward the retracting direction N2. Is done.

  As shown in FIGS. 2 and 6, the lancet holder 32 is for holding the lancet 1 and moving the lancet 1. Similarly to the moving plate 31, the lancet holder 32 moves in the puncture and retraction directions N 1 and N 2. It is possible. The lancet holder 32 has a holder portion 35 for holding the lancet 1 and a plate portion 36 connected to the moving plate 31 via a link member 30.

  The holder part 35 has a recessed part for accommodating the lancet 1. On the other hand, the plate portion 36 extends in the puncturing and retracting directions N1, N2, and has a groove 36a formed in the end portion 36A. The groove 36a is for allowing the movement of the second movable pin 30b in the link member 30, and extends in a direction orthogonal to the puncturing and retracting directions N1, N2. For this reason, the position of the plate portion 36 (lancet holder 32) coincides with the position of the second movable pin 30b in the puncturing and retracting directions N1, N2. Therefore, the lancet holder 32 reciprocates in one cycle around the fixed pin 30c while the link member 30 makes one rotation.

  As expected from FIG. 2A, the latch release member 4 is for releasing the latched state of the moving plate 31 with respect to the housing 2, and includes a spring portion 41 and a pressing portion 42.

  The spring portion 41 has moderate elasticity and connects the inner surface of the housing 2 and the pressing portion 42. On the other hand, the pressing portion 42 is a portion that is pressed by the user when releasing the engaged state of the hook portion 31C of the moving plate 31 (see FIGS. 6C and 6D). As shown in FIGS. 1 and 2B, the pressing portion 42 is exposed through the second opening 22 of the housing 2 and is allowed to move by the second opening 22. Since the pressing portion 42 is fixed to the housing 2 via the spring portion 41, the pressing portion 42 can move in the radial direction of the housing 2.

  In such a latch release member 4, when the pressing portion 42 is pressed, the pressing portion 42 is displaced inward in the radial direction, and the engagement state of the hook portion 31C is released. As described above, in the state where the hook portion 31C is engaged with the protruding portion 2, the moving plate 31 is urged toward the retracting direction N2, so that the engagement state of the hook portion 31C is released. The moving plate 31 moves in the retreat direction N2.

  As shown in FIGS. 2A and 2B, the puncture depth adjusting mechanism 5 is for adjusting the puncture depth of the lancet 1 with respect to the skin, and has an adjustment member 50. . As shown in FIGS. 2 and 5, the adjustment member 50 has a cylindrical portion 51 and a support portion 52, which are integrated via a beam 57 extending in the puncturing and retracting directions N1 and N2. Have a configuration.

  The tubular part 51 has a male screw part 53 and a cap 54. The male screw portion 53 is for screwing into the female screw portion 23 provided on the inner surface of the front end portion of the housing 2. That is, the adjustment member 50 is rotated in a state in which the male screw portion 53 of the cylindrical portion 51 is screwed into the female screw portion 23 of the housing 2, thereby puncturing and retracting directions N <b> 1 and N <b> 2 with respect to the housing 2. It is possible to move to. The cap 54 is a portion that is brought into close contact with the skin when puncturing the skin, and has a flange portion 56 in which a circular opening 55 is formed. The flange portion 56 is a portion that contacts the skin, and the opening portion 55 is for allowing the puncture needle 11 of the lancet 1 to protrude from the flange portion 56. The cap 54 is configured to be detachable from the male screw portion 53, and the cap 54 is configured not to rotate independently of the male screw portion 53 when the cap 54 is attached to the male screw portion 53. Yes. That is, in a state where the cap 54 is removed from the male screw portion 53 in the cylindrical portion 51, the lancet 1 can be easily attached to the lancet holder 32, and the adjustment member 50 can be rotated by rotating the cap 54. The whole rotates.

  On the other hand, the support portion 52 is for supporting the moving plate 31 via the coil spring 39. A coil spring 39 is connected to the support portion 52. That is, when the adjustment member 50 (support portion 52) is moved in the puncture or retraction directions N1 and N2 while the moving plate 31 is fixed to the housing 2, the coil spring is changed according to the change in the position of the support portion 52. 39 is expanded and contracted.

  Next, a method of using the puncture device X1 and an operation principle will be described. However, in the initial state, as shown in FIG. 6A, the movable plate 31 is located at a free position (top dead center) in the retracting direction N2, and the first movable pin 30a is located in the groove 31A of the movable plate 31. The second movable pin 30b is located at the left end of the groove 36a in the lancet holder 32, and the rotation angle of the link member 30 at this time is 0 degree.

  When puncturing the skin using the puncture device X1, first, as shown in FIGS. 1 and 6C, the hook portion 31C of the moving plate 31 is engaged with the protruding portion 21a of the housing 2. After that, the lancet 1 is attached to the lancet holder 32. However, the moving plate 31 may be latched to the housing 2 after the lancet 1 is attached to the lancet holder 32.

  The engagement state of the hook portion 31C can be achieved by moving the operation portion 31B of the moving plate 31 in the puncture direction N1, as shown in FIGS. 6 (a) to 6 (c).

  When the moving plate 31 is moved in the puncture direction N1 from the state shown in FIG. 6A, as shown in FIGS. 6A and 6B, the first movable pin 30a of the link member 30 is used. Tries to move the inclined groove 31Aa of the moving plate 31 toward the right side. In order to allow such movement of the first movable pin 30a, the entire link member 30 including the second movable pin 30b attempts to rotate clockwise around the fixed pin 30c. In order to allow such rotation of the link member 30, the second movable pin 30b moves toward the groove 36a of the lancet holder 32 while lifting the lancet holder 32 in the retracting direction N2. Therefore, when the moving plate 31 is moved from the position shown in FIG. 6A to the position shown in FIG. 6B (the rotation angle of the link member 30 is in the range of 0 ° to 90 °), the moving plate 31 moves. As the plate 31 moves in the puncturing direction N1, the lancet holder 32 moves in the retracting direction N2.

  When the moving plate 31 is further moved in the puncture direction N1 from the state shown in FIG. 6B, the first movable pin of the link member 30 is moved as shown in FIGS. 6B and 6C. 30a tries to reciprocate in the straight portion 31Ab of the groove 31A. In order to allow such movement of the first movable pin 30a, the second movable pin 30b moves the groove 36a from the center toward the right while pushing down the lancet holder 32 in the puncturing direction N1. Therefore, when the moving plate 31 is moved from the position shown in FIG. 6B to the position shown in FIG. 6C (the rotation angle of the link member 30 is in the range of 90 ° to 180 °), the moving plate 31 moves. When the lancet holder 32 moves in the puncture direction N1 as the plate 31 moves in the puncture direction N1, and the movable plate 31 moves in the puncture direction N1 by a certain distance, as shown in FIG. The hook portion 31 </ b> C of the moving plate 31 engages with the protruding portion 21 a of the housing 2. At this time, since the coil spring 39 is extended, the moving plate 31 is latched by the housing 2 while being urged in the retracting direction N2.

  On the other hand, attachment of the lancet 1 to the lancet holder 32 is performed by fitting the lancet 1 to the holder portion 35 of the lancet holder 32 with the cap 54 removed from the adjustment member 50 (see FIG. 5). The cap 54 is remounted after the lancet 1 is fitted to the lancet holder 32.

  And the puncture depth of the lancet 1 (puncture needle 11) with respect to skin is adjusted as needed. The adjustment of the piercing depth is performed by rotating the adjusting member 50 around the axis along the puncturing or retracting direction N1, N2.

  More specifically, when the adjustment member 50 (cap 54) is rotated counterclockwise as viewed in the N2 direction (retraction direction), the entire adjustment member 50 is relatively in the puncture direction N1 with respect to the housing 2. Moving. That is, while the support portion 52 of the adjustment member 50 is displaced in the puncture direction N1, the protruding amount of the adjustment member 50 (tubular portion 51) from the housing 2 is increased (change from a solid line to a virtual line state in FIG. 2). To do). On the other hand, the movement of the lancet holder 32 is regulated by the movement of the moving plate 31, and the lowest point of the puncture direction N 1 that the lancet holder 32 (lancet 1) can reach with respect to the housing 2 is It is independent of position. As a result, by increasing the protrusion amount of the adjustment member 50 with respect to the lancet holder 32, the protrusion amount of the puncture needle 11 from the adjustment member 50 (tubular portion 51) can be reduced. At this time, since the coil spring 39 is coupled to the support portion 52 and the moving plate 31 is latched in the housing 2, the coil spring 39 is contracted as the adjustment member 50 moves in the puncture direction N <b> 1. That is, when the puncture depth is set to be small, the amount of extension of the coil spring 39 is relatively small, so that the elastic force stored in the coil spring 39 is small, and the movable plate 31 (lancet holder 32) is punctured. ) Is also reduced in the puncture direction N1.

  On the other hand, when the adjustment member 50 (cap 54) is rotated in the clockwise direction as viewed in the N2 direction (retraction direction), the entire adjustment member 50 moves relative to the housing 2 in the retraction direction N2. To do. That is, while the support portion 52 of the adjustment member 50 is displaced in the retracting direction N2, the protruding amount of the adjustment member 50 from the housing 2 is reduced (changes from a virtual line to a solid line state in FIG. 2). On the other hand, the coil spring 39 is extended along with the movement of the adjustment member 50 in the retracting direction N2. As a result, when the puncture depth is set to be large, the amount of extension of the coil spring 39 is relatively large, and the elastic force stored in the coil spring 39 is large, and the movable plate 31 (lancet holder 32) is subjected to puncture. The resilience in the puncture direction N1 is also increased.

  When the latch of the moving plate 31 and the mounting of the lancet 1 are completed, the skin is punctured by pressing the pressing portion 42 of the latch release member 4 shown in FIG. When the pressing portion 42 is pressed, the pressing portion 42 is displaced inward by the deformation of the spring portion 41 of the latch release member 4. Accordingly, the pressing portion 42 interferes with the hook portion 31C and the hook portion 31C is displaced inward, so that the state where the hook portion 31C is engaged with the protruding portion 21a is released.

  As described above, since the moving plate 31 is urged toward the retracting direction N2, as shown in FIGS. 6C and 6D, the moving plate 31 moves toward the retracting direction N2. try to. At this time, the first movable pin 30a of the link member 30 tries to move the inclined groove portion 31Aa of the moving plate 31 toward the left. In order to allow such movement of the first movable pin 30a, the entire link member 30 including the second movable pin 30b attempts to rotate clockwise around the fixed pin 30c. In order to allow such rotation of the link member 30, the second movable pin 30b moves the groove 36a of the lancet holder 32 from the right toward the center while pushing down the lancet holder 32 in the puncturing direction N1.

  As shown in FIG. 6D, when the lancet holder 32 moves in the puncture direction N1, the lancet 1 also moves in the puncture direction N1, and the lancet 1 punctures the skin Sk. At this time, since the coil spring 39 is extended more than the state shown in FIG. 6A, the moving plate 31 tends to move in the retracting direction N2. In order to allow the movement of the moving plate 31, the second movable pin 30b moves from the center to the left from the groove 36a, while the first movable pin 30a reciprocates the linear portion 31Ab of the groove 31A. Thus, the link member 30 rotates clockwise around the fixing pin 30c. As a result, the lancet holder 32 is lifted in the retracting direction N2, and the lancet holder 32 returns to the free position before latching as shown in FIG. 6A, and the lancet 1 is removed from the skin.

  In the puncture device X1, the puncture force given to the lancet holder 32 (lancet 1) is small when the puncture depth is small, while the puncture force given to the lancet holder 32 (lancet 1) when the puncture depth is large. growing. As a result, although the puncture depth is small, the puncture force does not increase more than necessary. This frees the user from unnecessary pain during puncturing.

  In the puncture device X1, the puncture depth and the puncture force can be adjusted simultaneously by rotating the adjustment member 50 (tubular portion 51). Therefore, it is convenient for the user because it is not necessary to separately adjust the puncture depth and the puncture force. Further, in the puncture device X1, since the puncture force with respect to the puncture depth is uniquely determined, the number of trials to be performed by the user can be reduced when finding an appropriate combination of the puncture depth and the puncture force. As a result, the user's burden and pain when adjusting the puncture depth and puncture force are reduced. Such an effect can be obtained when the puncture device X1 is used for the first time, or when it is necessary to adjust the puncture depth and puncture force by changing the puncture site.

  The specific configuration of each part of the puncture device X1 according to the first embodiment can be varied in design in various ways. For example, in the puncture device X1, the moving plate 31 is latched in the housing 2 by moving the moving plate 31 in the puncturing direction N1, but the moving plate 31 is moved to the housing 2 by moving the moving plate 31 in the retracting direction N2. It may be configured to be latched. In this case, the lancet holder 32 is configured to reciprocate by moving the moving plate 31 in the puncturing direction N1. Further, the positional relationship between the first and second movable pins 30a and 30b in the link member 30, or the shape of the groove 31A of the moving plate 31 and the groove 36a of the lancet holder 32 is not limited to the example illustrated in the present embodiment. .

  Next, a second embodiment of the present invention will be described with reference to FIGS. In these drawings, elements similar to those of the puncture device X1 described above are denoted by the same reference numerals.

  The puncture device X2 shown in FIGS. 7 and 8 has the same basic configuration as the puncture device X1 described above, but the configuration of the adjustment member 50 ′ has been described above. 6). The adjustment member 50 'includes a first movable element 50A' including a cylindrical portion 51 'and a beam 57', and a second movable element 50B 'including a support portion 52'.

  The first movable element 50A ′ is rotatable with respect to the housing 2 in the puncturing and retracting directions N1 and N2 and in the puncturing and retracting directions N1 and N2. The beam 57 'of the first movable element 50A' has an end 57A 'on the retracting direction N2 side bent in a crank shape, and an engagement protrusion 57a' is provided on the end 57A '. This engagement protrusion 57a 'is for moving inside a cam groove 52A' of a support portion 52 'to be described later.

  The second movable element 50B ′ is movable in the puncturing and retracting directions N1 and N2 with respect to the housing 2 and the first movable element 50A ′. The support portion 52 'of the second movable element 50B' has a cam groove 52A 'and a guide hole 52B'. The cam groove 52A ′ is for allowing the engagement protrusion 57a ′ to move, and is inclined with respect to the puncturing and retracting directions N1 and N2. That is, when the engagement protrusion 57a ′ is moved inside the cam groove 52A ′, the second movable element 50B ′ (support portion 52 ′) is moved relative to the first movable element 50A ′ according to the moving direction. Move relative. Here, the inclination direction of the cam groove 52A ′ is such that when the cylindrical portion 51 ′ is rotated so that the protruding amount from the housing 2 is increased (so that the coil spring 39 is contracted), the support portion 52 ′ is in the puncture direction N1. And the support portion 52 'is set to move in the retracting direction N2 when the cylindrical portion 51' is rotated so that the protruding amount from the housing 2 is increased (so that the coil spring 39 is contracted). Yes. On the other hand, the guide hole 52B ′ is for allowing relative movement of the protrusion 26 ′ provided in the vicinity of the first opening 21 of the housing 2, and extends in the puncture and retraction directions N1 and N2. That is, the second movable element 50B ′ (support portion 52 ′) is non-rotatable with respect to the rising 2, and is relatively movable in the puncture or retreat directions N1, N2.

  In the puncture device X2, when the tubular portion 51 ′ is rotated so that the tubular portion 51 ′ moves relative to the housing 2 in the puncture direction N1, the engagement protrusion 57a retracts inside the cam groove 52A. It moves toward the end on the direction N2 side. Therefore, the support portion 52 ′ moves in the puncture direction N1 relative to the tubular portion 51 ′. As a result, the support portion 52 ′ moves in the puncture direction N1 by a distance moved relative to the tubular portion 51 ′ in addition to the distance that the tubular portion 51 ′ moves in the puncture direction N1. On the other hand, when the tubular portion 51 'is rotated so that the tubular portion 51' moves relative to the housing 2 in the retracting direction N2, the engagement protrusion 57a is located inside the cam groove 52A on the puncture direction N1 side. Therefore, the support portion 52 'moves in the retracting direction N2 relative to the cylindrical portion 51'. As a result, the support portion 52 ′ moves in the puncture direction N2 by a distance moved relative to the tubular portion 51 ′ in addition to the distance that the tubular portion 51 ′ moves in the puncture direction N2.

  In the puncture device X2, the support portion 52 is configured integrally with the cylindrical portion 51 as in the puncture device X1 described above, and compared with a configuration in which they are moved integrally (see FIGS. 1 to 6). The moving distance of the support portion 52 'when the portion 51' is rotated is configured to be large. That is, the puncture device X2 is configured such that the amount of expansion and contraction of the coil spring 39 when the tubular portion 51 ′ is rotated is larger than that of the puncture device X1 (see FIGS. 1 to 6). The range in which the strength of can be adjusted is increased.

  The specific configuration of each part of the puncture device X1 according to the second embodiment can be varied in design in various ways. For example, in puncture device X2, cam groove 52A 'is formed in support portion 52', while beam 57 'is integrated with tubular portion 52' and the end portion of beam 57 'on the retracting direction N2 side. The engagement protrusion 57a 'is provided on 57A'. However, the cam groove may be provided in the cylindrical part, while the beam support part is integrated, and the engagement protrusion may be provided at the end of the beam in the puncture direction side. .

  Next, a third embodiment of the present invention will be described with reference to FIGS.

  The puncture device X3 shown in FIGS. 9 to 11 is configured to transmit the elastic force of the coil spring directly to the lancet holder. The puncture device X3 includes a housing 2, a lancet holder 6, an outer sleeve 7, an inner sleeve 8, and an operation unit 9.

  The housing 2 accommodates the lancet holder 4 so as to be movable in the puncturing and retracting directions N1, N2. The housing 2 is provided with a convex step portion 24, a stopper portion 25, a guide portion 26 and a female screw portion 27. The convex step portion 24 is for engaging a latching claw 62 of the lancet holder 6 described later, and for regulating the position of the upper end portion of the coil spring 29. The stopper portion 25 is for causing the convex portion 61A of the lancet holder 6 to interfere when the lancet holder 6 moves in the puncture direction N1. The guide portion 26 is inserted into a guide hole 80 of the inner sleeve 8 to be described later, and guides the inner sleeve 8 to puncture and move in the retracting directions N1 and N2. The female screw portion 27 is for screwing an outer sleeve 7 described later, and is provided on the inner surface of the distal end portion of the housing 2.

  The lancet holder 6 can puncture and reciprocate in the retracting directions N1 and N2 inside the housing 2, and has a concave portion 60, convex portions 61A and 61B, and a plurality of latch claws 62.

  The recess 60 is for fittingly mounting the lancet 1 so as to be removable. The convex portions 61 </ b> A and 61 </ b> B are for arranging the coil spring 29 between the convex step portion 24 provided in the housing 2 and the coil spring 89 between the flange portion 82 of the inner sleeve 8. , Formed on the outer periphery of the intermediate portion in the longitudinal direction. The convex portion 61A is also for causing interference with the stopper portion 25 of the housing 2 when the lancet holder 6 is moved in the puncturing direction N1. Therefore, the lowest point (position in the puncturing direction N1) that the lancet holder 6 can reach inside the housing 2 is a fixed position regardless of the positions of the outer sleeve 7 and the inner sleeve 8. This also means that the lowest point (position in the puncture direction N1) that the lancet 1 (puncture needle 11) can reach is a constant position regardless of the positions of the outer sleeve 7 and the inner sleeve 8. is doing.

  Each latching claw 62 is for engaging with the convex step portion 24 provided on the inner periphery of the housing 2, and can be elastically deformed in directions close to each other. That is, in the puncture device X3, each latching claw 62 can be engaged with the convex step portion 24 by pushing the lancet holder 6 from the front end side to the rear end side of the housing 2. At this time, the coil spring 29 is compressed and deformed to store the elastic force.

  The outer sleeve 7 is a part for closely contacting the skin when puncturing the skin. The outer sleeve 7 has a flange portion 70, a cam groove 71 and a male screw portion 72. The flange portion 70 is a portion that is brought into contact with the skin, and has an opening 73 for allowing the puncture needle 11 of the lancet 1 to protrude from the flange portion 70. The cam groove 71 is for allowing movement of an engagement protrusion 81 of the inner sleeve 8 described later, and is inclined with respect to the puncturing and retracting directions N1 and N2 so that the right side is located above the left side. is doing. The male screw portion 72 is for screwing onto the female screw portion 27 of the housing 2. That is, the outer sleeve 7 can be moved in the puncture and retraction directions N1 and N2 with respect to the housing 2 by being rotated in a state where the male screw portion 72 is screwed into the female screw portion 27 of the housing 2. Has been. More specifically, the outer sleeve 7 moves to the retracting direction N2 side when rotated to the left side when viewed in the N2 direction (retracting direction), and the protrusion amount from the housing 2 is reduced, while the outer sleeve 7 is moved to the right side. When it is rotated, it is configured to move toward the puncture direction N1 and to increase the amount of protrusion from the housing 2. As described above, the lowest point at which the lancet 1 (puncture needle 11) can reach the housing 2 is independent of the position of the outer sleeve 7. Therefore, the distance between the outer sleeve 7 and the lowest point of the lancet 1 (puncture needle 11) is changed by adjusting the protruding amount of the outer sleeve 7 with respect to the housing 2. As a result, by adjusting the position of the outer sleeve 7, the amount by which the puncture needle 11 protrudes from the opening 73 of the outer sleeve 7, that is, the puncture depth can be adjusted.

  The inner sleeve 8 is for adjusting the amount of expansion and contraction of the coil spring 89 by regulating the position of the lower end of the coil spring 89, and punctures or retreats as the outer sleeve 7 moves in the puncture or retreat directions N1, N2. It is configured to move in the directions N1 and N2. The inner sleeve 8 has a guide hole 80 and an engaging protrusion 81.

  The guide hole 80 is a portion through which the flange portion 70 of the outer sleeve 7 described above is inserted. By allowing the flange portion 70 to move within the guide hole 80, the inner sleeve 8 is moved to the outer sleeve 7 and the housing 2. It has the role of moving in the puncture or evacuation direction N1, N2 without relatively rotating.

  The engaging projection 81 moves in the cam groove 71 of the outer sleeve 7 when the outer sleeve 7 is rotated. As described above, the cam groove 71 of the outer sleeve 7 is formed in a shape in which the right side is an upper portion compared to the left side, while the inner sleeve 8 is not rotated by the guide hole 80 and puncture or retract direction N1, It is configured to move to N2. Therefore, when the outer sleeve 7 is rotated leftward (viewed in the N2 direction (retracted direction)), the engagement protrusion 81 moves in the cam groove 71 in the retracted direction N2 while the outer sleeve 7 is moved to the right side. When rotated in the direction N2 (retraction direction), the cam groove 71 moves in the puncture direction N1. As described above, the outer sleeve 7 moves in the puncture direction N1 when rotated to the left in the N2 direction (retracted direction) view, and moves in the retracted direction N2 when rotated to the right. As a result, the inner sleeve 8 moves in the opposite direction to the outer sleeve 7 in the puncturing or retracting directions N1, N2 by rotating the outer sleeve 7. Therefore, when the outer sleeve 7 is moved in the puncturing direction N1 and the inner sleeve 8 is moved in the retracting direction N2, the coil spring 89 is compressed, while the outer sleeve 7 is moved in the retracting direction N2 to move the inner sleeve. When 8 is moved in the puncturing direction N1, the coil spring 89 is extended.

  Here, the relative movement distance of the inner sleeve 8 with respect to the outer sleeve 7 when the outer sleeve 7 is rotated depends on the inclination angle of the cam groove 71 in the outer sleeve 7. For example, the larger the inclination angle of the cam groove 71 with respect to the puncture or retreat directions N1, N2, the closer the horizontal movement of the cam groove 71, the smaller the total moving distance of the inner sleeve 8 when the outer sleeve 7 is rotated. On the other hand, the amount of expansion and contraction of the coil spring 29 is an element that determines the puncture force of the puncture needle 11 with respect to the skin, and is determined according to the relative movement distance of the inner sleeve 8 with respect to the outer sleeve 7. Therefore, by selecting the magnitude of the inclination angle of the cam groove 71, the range of increase / decrease in the amount of expansion / contraction (puncture force) of the coil spring 29 with respect to the rotation angle of the outer sleeve 7 can be determined. As a result, when the possible rotation angle of the outer sleeve 7 or the inner sleeve 8 cannot be set large, the adjustment angle of the puncture force can be increased by setting the inclination angle of the cam groove 71 with respect to the puncture or retreat directions N1 and N2 small. Can be secured.

  The operation portion 9 is for releasing the engagement between the latching claw 62 of the lancet holder 6 and the convex step portion 24 of the housing 2, and is slidably fitted to the rear end portion of the housing 2. Yes. The operation unit 9 has an inclined surface 90 corresponding to the inclined surface 62A at the tip of each latching claw 62 at the tip. When the operation unit 9 is moved forward, the latching claws 62 are deformed closer to the center axis of the housing 2 by the action of the inclined surface 90 pressing the inclined surface 62A, and each latching claw 62 with respect to the convex step portion 24 is deformed. The engagement state of the claw 62 is released. As a result, the lancet holder 6 moves forward by the elastic force of the coil spring 29. At the time of this advance, the forward movement stroke of the lancet holder 6 is defined to be a predetermined appropriate amount by the convex portion 61 of the lancet holder 6 coming into contact with the stopper portion 25 of the housing 2. A coil spring 99 is provided in the rear portion of the housing 2 to be compressed when the operation portion 9 is advanced, and the operation portion 9 returns to the original initial position by the resilient force of the coil spring 99 after the advance operation. It is supposed to be.

  Next, the operation of the puncture device X3 will be described.

  In order to puncture the skin using the puncture device X3, first, as shown in FIG. 11 (a) or FIG. 11 (b), the latching claw 62 of the lancet holder 6 is moved to the convex step portion of the housing 2. After the lancet holder 6 is latched by being engaged with the lancet 24, the lancet 1 is mounted on the lancet holder 32. However, the lancet holder 6 may be latched to the housing 2 after the lancet 1 is attached to the lancet holder 32.

  And the puncture depth of the lancet 1 (puncture needle 11) with respect to skin is adjusted as needed. The adjustment of the piercing depth is performed by rotating the outer sleeve 7 around the axis along the puncturing or retracting directions N1 and N2.

  More specifically, when the outer sleeve 7 is rotated counterclockwise in the N2 direction (retracted direction), the entire outer sleeve 7 moves relative to the housing 2 in the puncture direction N1. Thereby, the protrusion amount of the outer sleeve 7 from the housing 2 becomes large (changes from the state of FIG. 11A to the state of FIG. 11B). As described above, by increasing the protrusion amount of the outer sleeve 7 with respect to the lancet holder 32, the puncture depth from the outer sleeve 7 (flange portion 70) is set small. On the other hand, the inner sleeve 8 moves in the direction opposite to the outer sleeve 7 as described above. Therefore, when the outer sleeve 7 is moved in the puncturing direction N1, the inner sleeve 8 is moved in the retracting direction N2, and the coil spring 89 is contracted. Therefore, when the outer sleeve 7 is moved in the puncture direction N1 and the puncture depth is set small, the amount by which the coil spring 89 is compressed when the lancet holder 6 is moved in the puncture direction N1 during puncture is reduced. While the lancet holder 6 (lancet 1) moves in the puncture direction N1, the elastic force stored in the coil spring 89 becomes small.

  On the other hand, when the outer sleeve 7 is rotated in the clockwise direction as viewed in the N2 direction (retracted direction), the entire outer sleeve 7 moves relative to the housing 2 in the retracted direction N2. Thereby, the protrusion amount of the outer sleeve 7 from the housing 2 is reduced, and the puncture depth is set small (changes from the state of FIG. 11B to the state of FIG. 11A). On the other hand, the inner sleeve 8 moves in the puncture direction N1 as the outer sleeve 7 moves in the retracting direction N2, and the coil spring 89 is extended. Therefore, when the outer sleeve 7 is moved in the retracting direction N2 and the puncture depth is set to be large, the amount by which the coil spring 89 is compressed when the lancet holder 6 is moved in the puncturing direction N1 during puncturing increases. While the lancet holder 6 (lancet 1) moves in the puncture direction N1, the elastic force stored in the coil spring 89 becomes small.

  When the latch of the lancet holder 6 and the mounting of the lancet 1 are completed, the operation unit 9 is pressed by pressing the operation unit 9 after bringing the flange portion 70 of the outer sleeve 7 into contact with the skin to be punctured. The skin is punctured by moving to N1. More specifically, when the operation unit 9 is pressed, the inclined surface 90 of the operation unit 9 moves in the puncturing direction N1, and the inclined surface 90 interferes with the inclined surface 62A of the latching claw 62 in the lancet holder 6. . As a result, each latching claw 62 is deformed toward the center axis of the housing 2, the engagement state of each latching claw 62 with respect to the convex step portion 24 of the housing 2 is released, and the lancet holder 6 is released from the spring of the coil spring 29. It moves in the puncture direction N1 by force.

  The movement of the lancet holder 6 in the puncturing direction N <b> 1 is restricted by the convex portion 61 of the lancet holder 6 coming into contact with the stopper portion 25 of the housing 2. On the other hand, the coil spring 89 is contracted when the lancet holder 6 moves in the puncture direction N1, and applies a return force in the retracting direction N2 to the lancet holder 6.

  As described above, in the puncture device X3, when the puncture depth is set to be small, the compression amount (elastic force) of the coil spring 89 when the lancet holder 6 is moved in the puncture direction N1 is reduced. When the puncture depth is set large, the compression amount (elastic force) of the coil spring 89 when the lancet holder 6 is moved in the puncture direction N1 becomes large. Therefore, in the puncture device X3, when the puncture depth is small, the returning force acting on the lancet holder 6 in the retracting direction N2 before and after puncture is small, while when the puncture depth is large, before and after the puncture In this case, since the return force acting on the lancet holder 6 toward the retracting direction N2 is increased, the puncture force is reduced.

  Therefore, in the puncture device X3, as with the puncture device X1 (see FIG. 2), the puncture force when the puncture depth is small can be reduced, while the puncture force when the puncture depth is large can be increased. Such an effect can be obtained by one extremely simple operation such as rotating the outer sleeve 7, which is convenient and convenient for the user.

  In the third embodiment of the present invention, the cam groove 71 is formed in the outer sleeve 7, while the inner sleeve 8 is provided with the engaging protrusion 81 capable of moving the cam groove 71. While the sleeve corresponding to the cam groove is provided, the outer sleeve may be provided to correspond to the engaging protrusion.

  In the first to third embodiments of the present invention, the lancet 1 is configured to move in the puncture direction N1 using the elastic force of the coil springs 29, 39. You may comprise so that the elastic force for moving the lancet 1 to the puncture direction N1 may be acted using this elastic member. The puncture needle 11 is detachable from the lancet holder 32 as a form of the lancet 1, but the puncture needle may be integrated with a moving body that performs the same operation as the lancet holders 6 and 32.

1 is an overall perspective view showing a puncture device according to a first embodiment of the present invention. (A) is IIa-IIa principal part sectional drawing of FIG. 1, (b) is IIb-IIb principal part sectional drawing of FIG. It is a whole perspective view of the link member in the puncture apparatus shown in FIG. It is a front view for demonstrating rotation operation of the link member shown in FIG. It is a whole perspective view of the adjustment member in the puncture apparatus shown in FIG. It is a schematic diagram for demonstrating operation | movement of the puncture apparatus shown in FIG. It is sectional drawing which shows the principal part of the puncture apparatus which concerns on the 2nd Embodiment of this invention. It is a whole perspective view of the adjustment member in the puncture apparatus shown in FIG. It is a whole perspective view which shows the puncture apparatus which concerns on the 3rd Embodiment of this invention. It is a principal part front view of the puncture apparatus shown in FIG. FIG. 10 is a cross-sectional view for explaining the operation of the puncture device shown in FIG. 9.

Explanation of symbols

X1, X2, X3 Puncture device 11 Puncture needle (puncture element)
2 Housing 25 (Housing) Stopper 26 (Housing) Guide (Projection)
31 Moving plate (moving body)
32 Lancet holder (additional moving body)
39 Coil spring (elastic member)
50, 50 'adjustment member 50A' first adjustment element 50B '(adjustment member) second movement element 51, 51' (adjustment member) cylindrical part 52, 52 '(adjustment member) support Part 52A '(first movable element) cam groove (convex part)
57a 'engagement protrusion (concave part) (of second movable element)
6 Lancet holder (moving body)
61A, 61B (Lancet holder) convex part (locking part)
7 Outer sleeve (adjustment member)
71 Cam groove (recessed) (outer sleeve)
8 Inner sleeve (driven member)
80 Guide hole (inner sleeve)
81 Engagement protrusion (projection) of inner sleeve
89 Coil spring (elastic member)
N1 Puncture direction N2 Retraction direction

Claims (20)

A puncture device for moving the puncture element in the puncture direction from the standby position toward the puncture position and piercing the puncture element into the skin,
Puncture provided with an adjustment member capable of adjusting the depth of puncture of the puncture element with respect to the skin by moving the puncture direction or a retracting direction opposite to the puncture direction In the device
A puncture apparatus configured to adjust a force for piercing the puncture element against the skin when the adjustment member is moved in the puncture or retraction direction.   Compared with the case where the puncture depth for the skin is set relatively large, the force for piercing the puncture element against the skin is smaller when the puncture depth is set relatively small. The puncture device according to claim 1, which is configured.   The puncture apparatus according to claim 2, further comprising an elastic member whose amount of expansion and contraction changes in the puncture or retract direction when the adjustment member is moved in the puncture or retract direction.   The puncture device according to claim 3, wherein the elastic member is for applying a force to move the puncture element in the puncture direction when the puncture element is pierced into the skin. A housing that houses the puncture element and the elastic body, and a moving body that moves inside the housing to move the puncture element,
The puncture apparatus according to claim 4, wherein the elastic body is connected to the adjustment member and the moving body.   The puncture according to claim 5, wherein the adjustment member is screwed into the housing and is movable in the puncture or retraction direction by rotating around an axis along the puncture and retraction direction. apparatus.   The adjustment member includes a cylindrical portion that is screwed into the housing and partially protrudes from the housing in the puncturing direction, and a support portion to which the elastic member is coupled. The puncture device according to 1.   The tubular portion is a portion that is brought into contact with the skin when the puncture element is pierced into the skin, and a portion that is operated when the adjustment member is moved in the puncture or retraction direction with respect to the housing. The puncture device according to claim 7. The adjustment member includes a first movable element including the cylindrical portion, and a second movable element formed separately from the first movable element and including the support portion, And,
One of the first and second movable elements has a recess extending in a direction inclined with respect to the puncturing and retracting direction, while the other movable element is disposed inside the recess. It has a convex part that can move,
When the cylindrical portion is rotated about the axis, the convex portion moves inside the concave portion, and the first movable element is moved relative to the second movable element in a direction along the axial center. The puncture apparatus according to claim 7 or 8, wherein the puncture apparatus is configured to relatively move in the puncturing or retracting direction. While the first movable element is configured to be movable in a direction along the axis with respect to the housing and to be rotatable around the axis,
The puncture device according to claim 9, wherein the second movable element is configured to be movable in a direction along the axis with respect to the housing and to be non-rotatable around the axis. An additional moving body that moves integrally with the puncture element and is movable in the puncturing or retracting direction in conjunction with the movement of the moving body;
By moving the moving body in the puncturing direction, a resilient force for moving the puncture element is stored in the elastic member, while moving the moving body in the retracting direction causes the additional movement. The puncture apparatus according to any one of claims 4 to 10, wherein the puncture apparatus is configured to move a body at least in the puncture direction.   The puncture device according to claim 3, wherein the elastic member is for applying a force that moves the puncture element in the retracting direction before and after the puncture element is pierced into the skin.   13. The apparatus according to claim 12, further comprising a driven member that moves in a direction opposite to the adjustment member to expand and contract the elastic member when the adjustment member is relatively moved in the puncturing or retracting direction. Puncture device. A housing that houses the puncture element and the elastic body, and a moving body that moves inside the housing to move the puncture element,
The puncture apparatus according to claim 13, wherein the elastic body is disposed between the locking portion of the driven member and the locking portion of the movable body.   The housing includes a stopper portion that interferes with a locking portion of the moving body in order to limit movement of the moving body in the puncturing direction when the moving body moves in the puncturing direction. The puncture device according to claim 14.   The adjustment member is screwed into the housing so that a part thereof protrudes in the puncturing direction, and can be moved in the puncturing or retracting direction by rotating around an axis along the puncturing and retracting direction. The puncture device according to claim 14 or 15, wherein   The portion of the adjustment member that protrudes from the housing is a portion that comes into contact with the skin when the puncture element is inserted into the skin, and a portion that is operated when the position of the adjustment member is changed. The puncture device according to 1. One of the adjustment member and the driven member has a recess extending in a direction inclined with respect to the puncture direction, while the other member is a protrusion that can move inside the recess. Have
When the adjustment member is rotated about the axis, the convex part moves inside the concave part, and the driven member moves in a direction opposite to the adjustment member in a direction along the axis. The puncture device according to claim 17, which is configured as described above.   The puncture device according to claim 18, wherein the driven member is housed inside the adjustment member and is supported so as to be movable in the puncture and retraction directions with respect to the housing. One element of the housing and the driven member is provided with a concave portion extending in the puncturing and retracting direction, and the other element of them has a convex portion that moves inside the concave portion. Is provided,
The puncture device according to claim 19, wherein rotation of the driven member around the axis is limited by moving the convex portion into the concave portion.

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