JP2008099999A - Puncture tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a puncture tool capable of reliably discriminating whether the puncture tool is the unused one or the used one. <P>SOLUTION: The puncture tool 2 includes: a puncture needle 22 having a needle body 23, where a sharp needlepoint 231 is arranged at the distal end, and a needle hub 29 which is fixed to the proximal end of the needle body 23 and has an elastic deformation part 292 which is elastically deformable so as to be displaced with respect to the needle body 23, at the distal end side; a tubular casing 21 which stores the puncture needle 22 so as to be movable in the longitudinal direction and has an opening 211 for allowing the needlepoint 231 to be projected; a ring shape member 24 which is mounted on the elastic deformation part 292 so as to be separable, permits the movement of the puncture needle 22 toward the distal end, so as to allow the needlepoint 231 to be projected from the opening 211 when the member 24 is mounted, and restricts the movement of the puncture needle 22 toward the distal end, so as to prevent the needlepoint 231 from being projected from the opening 211 when the member 24 is separated. A thin part 25 for visually recognizing the ring shape member 24 is formed in the casing 21 of the puncture tool 2. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a puncture device.

  In recent years, with the increase in the number of diabetic patients, self blood glucose measurement in which patients themselves monitor fluctuations in daily blood glucose levels has been recommended.

  A blood glucose measuring device that automatically measures the amount of glucose in the blood is used to measure the blood glucose level. Prior to this measurement, the patient needs to collect his blood.

  As a method for collecting blood, after puncturing the skin of a fingertip with a puncture needle, the blood is squeezed by pressing the periphery of the puncture portion with a finger or the like.

  For the puncture of the fingertip with this puncture needle, a puncture device (see, for example, Patent Document 1) including a puncture needle and a casing (cap) that movably houses the puncture needle (lancet) is used. Specifically, the puncture device is attached to the puncture device, the puncture device is operated to cause the puncture needle to protrude, and the fingertip is punctured.

  When the puncture device is in an unused state and a used state (after use), the needle tip is positioned in the casing in order to prevent erroneous puncture by the needle tip of the puncture needle.

  However, the casing is not configured so that the inside thereof can be seen, that is, because the casing side wall is made of an opaque material, whether the puncture tool is in an unused state or not is used depending on the appearance of the puncture tool. It was difficult to tell if it was already finished. For this reason, there is a possibility that a used puncture tool is mistakenly attached to the puncture device and the fingertip is punctured using the puncture tool.

US Pat. No. 6,540,762

  An object of the present invention is to provide a puncture device that can reliably distinguish whether a puncture device is unused or used.

Such an object is achieved by the present inventions (1) to (15) below.
(1) A puncture device that is used by being detachably attached to the tip of a puncture device,
A needle body having a sharp needle tip at the tip, and an elastic deformation portion fixed to the base end portion of the needle body and elastically deformable so as to be displaced with respect to the needle body are provided on the tip side. A puncture needle having a needle hub,
A casing having a tubular shape that houses the puncture needle so as to be movable in the longitudinal direction and has a tip opening from which the needle tip can protrude;
The outer peripheral portion of the elastic deformation portion is detachably mounted in the distal direction, and in the mounted state attached to the elastic deformation portion, the puncture needle is allowed to move in the distal direction, and the needle tip of the casing is A ring that enables protrusion from the distal end opening and restricts movement of the puncture needle in the distal end direction and prevents protrusion of the needle tip from the distal end opening of the casing in a detached state in which the protrusion is detached from the elastically deformable portion. And a member
The casing has a window part through which the ring-shaped member can be visually recognized.

  (2) The puncture device according to (1), wherein the window portion is provided at a position where the ring-shaped member in the mounted state is visible.

  (3) The puncture device according to (1), wherein the window portion is provided at a position where the ring-shaped member in the detached state is visible.

  (4) The puncture device according to (1), wherein the window portion is provided at a position where the ring-shaped member in the mounted state and the detached state can be visually recognized.

(5) The casing has a reduced diameter portion formed on an inner peripheral portion thereof and having an inner diameter reduced.
The puncture needle moves in the proximal direction with respect to the casing, so that the ring-shaped member in the mounted state comes into contact with the reduced diameter portion and is detached from the elastic deformation portion. Puncture tool.

  (6) The puncture device according to (5), wherein the window portion is located on a proximal end side with respect to the reduced diameter portion.

  (7) The puncture device according to (5), wherein the window portion is located on a distal end side with respect to the reduced diameter portion.

  (8) The puncture device according to (5), wherein the window portion is provided from the distal end side to the proximal end side of the reduced diameter portion.

  (9) The puncture device according to any one of (1) to (8), wherein the window portion is a portion made of a substantially transparent material on a side wall of the casing.

  (10) The puncture device according to any one of (1) to (9), wherein the window portion is configured by a thin portion formed on a side wall of the casing.

  (11) The puncture device according to any one of (1) to (10), wherein the window portion is provided in a part or all of the circumferential direction of the side wall of the casing.

  (12) The puncture device according to any one of (1) to (11), wherein the ring-shaped member and the casing have different colors.

(13) The tip portion of the puncture device is provided with a colored portion that colors the tip portion;
The casing includes a flange portion that comes into contact with a tip of the puncture device when the puncture device is attached to the puncture device, and a cover portion that is formed at an edge portion of the flange portion and covers almost all of the coloring portion. The puncture device according to any one of (1) to (12) above.

(14) The inner peripheral portion of the ring-shaped member has a tapered shape in which the inner diameter gradually increases in the distal direction.
The puncture device according to any one of (1) to (13), wherein the outer peripheral portion of the elastically deforming portion has a tapered shape in which an outer diameter gradually increases in a distal direction.

  (15) The puncture device according to any one of (1) to (14), wherein the elastically deforming portion includes a plurality of protrusions spaced apart from each other.

  According to the present invention, the ring-shaped member in the mounted state and / or the detached state can be surely visually confirmed. Thereby, it is possible to easily and reliably distinguish (distinguish) whether the puncture device is unused or used. Therefore, for example, it is possible to reliably prevent a used puncture device from being erroneously attached to the puncture device and puncturing a fingertip using the puncture device.

  In addition, when the window portion is formed of a thin portion, the strength of the casing, that is, the vicinity of the thin portion is reduced by setting the position where the thin portion is formed in the circumferential direction of the side wall of the casing. Can be suppressed.

Hereinafter, the puncture device of the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.
<First Embodiment>
1 to 5 are longitudinal sectional views showing a first embodiment of the puncture device of the present invention, FIG. 6 is a sectional view taken along line AA in FIG. 1, and FIGS. The figure (longitudinal sectional view) for demonstrating the method of mounting | wearing and using the puncture device (1st Embodiment) of invention for a puncture apparatus, FIG. 9 is an adjustment part with which the puncture apparatus shown in FIG. 7 and FIG. It is a figure which shows a structure (a side surface and both end surfaces). In the following description, the left side in FIGS. 1 to 5, 7, and 8 (the same applies to FIGS. 10 to 12) is referred to as “tip”, and the right side is referred to as “base end”.

  The puncture device 2 shown in FIGS. 1 to 5 is used (used) by being detachably attached to the distal end portion 36 of the puncture device 10 as shown in FIGS. 7 and 8. This puncture device 10 is provided with a long housing 3, a plunger 5, an adjustment section 6, a puncture operation section (operation means) 7, a set operation section (operation section) 8, and a plunger 5 in the distal direction. A coil spring 91 for biasing and a coil spring 92 for biasing the plunger 5 in the proximal direction are provided. The puncture apparatus 10 will be described later.

  A puncture device 2 shown in FIG. 1 (the same applies to FIGS. 2 to 5) includes a tubular casing (puncture needle holder) 21 and a puncture needle 22 accommodated in the casing 21 so as to be movable in the axial direction (longitudinal direction). And a ring-shaped member 24 attached to the puncture needle 22 (the outer periphery (outer peripheral portion) of the elastic deformation portion 292).

  As shown in FIG. 1, the puncture needle 22 has a needle body 23 and a needle hub (hereinafter simply referred to as “hub”) 29.

The needle body 23 is provided (formed) with a sharp needle tip 231 at the tip thereof.
The constituent material of the needle body 23 is not particularly limited. For example, various metal materials such as stainless steel, aluminum or an aluminum alloy, titanium or a titanium alloy, a superelastic alloy such as a Ni-Ti alloy, and various hard materials such as polyphenylene sulfide. Examples thereof include resin materials.

  The hub 29 is provided on a columnar hub body 291, an elastic deformation portion 292 provided in the distal direction on the distal end side of the hub body 291, and a proximal end side of the hub body 291. And a mounted portion 293 to be mounted on the plunger 5.

  The hub body 291 is fixed to the proximal end portion of the needle body 23 so that the needle tip 231 of the needle body 23 is exposed. The hub body 291 includes a large-diameter portion 294 and a small-diameter portion 295 formed on the distal end side of the large-diameter portion 294.

  The large diameter portion 294 has an outer diameter substantially equal to the inner diameter of the inner peripheral portion 26 of the casing 21. Further, the outer diameter of the large diameter portion 294 gradually decreases in the distal direction, that is, has a tapered surface 296 on the distal end side.

  The small diameter portion 295 is formed so that its outer diameter is slightly smaller than the outer diameter of the large diameter portion 294. Further, the distal end side (needle tip 231) of the needle body 23 is exposed from the distal end portion of the small diameter portion 295.

  An elastic deformation portion 292 is formed to protrude (extend) in the distal direction on the distal end surface 295a of the small diameter portion 295.

  The mounted portion 293 is formed to protrude from the base end surface 294 a of the large diameter portion 294 of the hub body 291. Further, the mounted portion 293 is formed with a diameter smaller than the outer diameter of the large diameter portion 294.

  The constituent material of the hub 29 is not particularly limited. For example, polyolefin such as polyethylene, polypropylene, and ethylene-vinyl acetate copolymer, modified polyolefin, polyamide (eg, nylon 6, nylon 46, nylon 66, nylon 610). , Nylon 612, Nylon 11, Nylon 12, Nylon 6-12, Nylon 6-66), Thermoplastic polyimide, aromatic polyester and other liquid crystal polymers, polyphenylene oxide, polyphenylene sulfide, polycarbonate, polymethyl methacrylate, polyether, polyether Ether ketone, polyether imide, polyacetal, styrene, polyolefin, polyvinyl chloride, polyurethane, polyester, polyamide, polybutadiene, transpo Various thermoplastic elastomers such as isoprene-based, fluororubber-based, chlorinated polyethylene, etc., or copolymers, blends, polymer alloys, etc. mainly containing these, and one or more of these are included. It can be used by mixing.

  The elastic deformation part 292 has a cylindrical shape as a whole, and a pair of notches (defects) 297 are formed along the longitudinal direction. In other words, the elastically deformable portion 292 is configured by two projecting portions 292c that have a circular cross-sectional shape and are spaced apart from each other. As a result, the needle body 23 can be more easily elastically deformed.

  Further, the outer periphery 292a of the mounting portion 292b of the elastically deformable portion 292 has a tapered shape in which the outer diameter gradually increases in the distal direction.

  Such an elastic deformation portion 292 can be elastically deformed so that the position in the radial direction (direction indicated by r in FIG. 6) changes, that is, the distance from the needle body 23 changes. In other words, the elastic deformation portion 292 has a reduced diameter state (see the elastic deformation portion 292 indicated by a broken line (two-dot chain line) in FIG. 4) where the distance from the needle body 23 is close to the needle body 23. It can be elastically deformed so as to change into a distant expanded state (natural state (see FIG. 5)).

  In a preferred embodiment (embodiment) of the present invention, the ring-shaped member 24 is mounted on the mounting portion 292b (outer periphery 292a) of the elastically deformable portion 292 in the natural state. Here, the “natural state” refers to a state in which an external force is not applied (applied) to the elastic deformation portion 292.

  As shown in FIG. 1, the outer diameter of the ring-shaped member 24 is substantially equal to the inner diameter of the inner peripheral portion 26 of the casing 21.

  The inner circumference (inner circumference) 241 of the ring-shaped member 24 has a tapered shape in which the diameter (inner diameter) gradually increases in the distal direction. That is, the thickness (thickness) on the distal end side of the ring-shaped member 24 is thinner than the thickness (thickness) on the proximal end side.

  When the inner periphery 241 of the ring-shaped member 24 and the outer periphery 292a of the elastic deformation portion 292 are tapered, the elastic deformation portion is separated from the elastic deformation portion 292 (detached state). 292 is in a natural state or an expanded diameter state, and the outer diameter at that time is larger than the inner diameter of the base end side of the ring-shaped member 24. Thereby, it is possible to prevent the ring-shaped member 24 from being attached to the elastic deformation portion 292 again. That is, the ring-shaped member 24 is configured to be irreversibly detached from the elastic deformation portion 292.

  Furthermore, since the elastic deformation portion 292 is in a natural state in a state where the ring-shaped member 24 is mounted (mounted state), stable performance can be obtained without plastic deformation.

  However, when the elastic deformation portion 292 is not plastically deformed or usable, the inner periphery 241 of the ring-shaped member 24 and the outer periphery 292a of the elastic deformation portion 292 are not tapered. However, when the ring-shaped member 24 is mounted in a state where the elastic deformable portion 292 is stressed and reduced in diameter, and the ring-shaped member 24 is detached in the distal direction, the elastic deformable portion 292 is expanded in diameter. You may make it be in a state.

  In addition, although the magnitude | size of taper angle (theta) (refer FIG. 5) of the inner periphery 241 of the ring-shaped member 24 is not specifically limited, For example, it is preferable that it is 1 to 45 degree | times, and it is 3 to 15 degree | times more. preferable.

  This makes it easier for the ring-shaped member 24 to be detached from the elastic deformation portion 292, and can reliably prevent the detached ring-shaped member 24 from being attached to the elastic deformation portion 292 again.

  The shape of the ring-shaped member 24 is not particularly limited as long as the outer peripheral shape can move in the longitudinal direction inside the casing 21, but the shape of the inner peripheral surface (inner peripheral portion 26) of the casing 21. A shape substantially coincident with is preferable, and a circular shape is more preferable because movement in the longitudinal direction is easy.

  The inner peripheral shape is not particularly limited as long as it is a shape suitable for mounting at the time of manufacture and detachment at the time of use with the elastic deformation portion 292, but a circular shape is particularly preferable.

  In addition, the constituent material of the ring-shaped member 24 is not particularly limited, but for example, the constituent materials mentioned in the description of the hub 29 can be used.

  As shown in FIG. 1, the tip of the casing 21 is a part that comes into contact with a living body surface such as a fingertip, palm, upper arm, abdomen, thigh, and earlobe, and an opening (tip opening) 211 is formed. . Further, an opening (base end opening) 214 is formed at the base end of the casing 21.

  A first tapered portion 219a, a constant outer diameter portion 219b, and a second tapered portion 219c are formed in this order from the distal end side at the distal end portion of the casing 21.

The first tapered portion 219a is a portion whose outer diameter gradually increases in the proximal direction.
The constant outer diameter portion 219b is formed continuously with the first taper portion 219a, and is a portion having a constant outer diameter.

  The second tapered portion 219c is formed continuously with the constant outer diameter portion 219b, and is a portion where the outer diameter gradually increases in the proximal direction.

  In addition, a third taper portion 219d whose inner diameter gradually increases in the proximal direction is formed on the inner peripheral portion of the distal end portion of the casing 21.

  A ring-shaped member contact portion 27, a locking portion (reduced diameter portion) 28, and a hub engaging portion 213 are provided on the inner peripheral portion 26 of the casing 21.

  The ring-shaped member abutting portion 27 is formed so that the inner diameter of the distal end portion of the inner peripheral portion 26 is reduced. As shown in FIG. 5, the base end surface 271 of the ring-shaped member abutting portion 27 has a distal end surface 242 of the ring-shaped member 24 that is detached (in a detached state) from the hub 29 (elastically deforming portion 292) of the puncture needle 22. Abut. Thereby, the ring-shaped member 24 is prevented (restricted) from moving in the distal direction from the ring-shaped member abutting portion 27.

  The locking portion 28 is formed so that the inner diameter of the central portion of the inner peripheral portion 26 is reduced. In addition, inclined surfaces 281 and 282 are formed on the distal end side and the proximal end side of the locking portion 28, respectively.

  As shown in FIG. 4, when removing the puncture device 2 from the puncture device 10, first, the casing 21 moves in the distal direction, so that the puncture needle 22 mounted on the puncture device mounting portion 51 is relatively proximal. The base end surface 243 of the ring-shaped member 24 attached to (attached to) the elastic deformation portion 292 comes into contact (engagement) with the inclined surface 281 of the locking portion 28. Thereby, the ring-shaped member 24 is prevented (regulated) from moving in the proximal direction from the locking portion 28.

  Providing such a locking portion 28 prevents the ring-shaped member 24 from moving in the proximal direction when the puncture device 2 is removed from the puncture device 10. The ring-shaped member 24 can be reliably detached from the puncture needle 22 (elastically deformable portion 292) pulled in the direction (see FIG. 4).

  A hub engaging portion 213 that can engage with the outer periphery of the large-diameter portion 294 (hub 29) is formed on the inner peripheral portion 26 of the casing 21. As shown in FIG. 1, the large diameter portion 294 is engaged (locked) with each hub engaging portion 213, thereby preventing the puncture needle 22 from being detached from the proximal end side of the casing 21. .

  In addition, a ring-shaped rib (flange) 215 that abuts against the tip 35 of the housing 3 (housing main body 30) when the puncture device 2 is attached to the puncture device 10 is formed on the outer peripheral portion of the casing 21.

  A cover part projects from the edge of the rib 215 toward the proximal end. The cover portion is formed on the edge of the rib 215 over the entire circumference.

  In addition, the constituent material of the casing 21 is not particularly limited, and for example, the constituent materials described in the description of the hub 29 can be used.

As shown in FIGS. 1 to 5 (the same applies to FIGS. 7 and 8), a thin portion 25 is formed on the side wall of the casing 21. In the thin portion 25, the thickness t ₁ of the distal end side of the locking portion 28 on the side wall of the casing 21 is larger than the thickness t ₂ of the portion on the proximal end side of the locking portion 28 of the side wall of the casing 21. It is a small part (see FIG. 1). Incidentally, the ratio _{t 1} / _{t 2} of the thickness _{t 1} relative to the thickness _{t 2} is not particularly limited, for example, is preferably from 0.1 to 0.9, which is 0.25 to 0.75 Is more preferable.

  Such a thin portion 25 has transparency to the extent that the inside of the casing 21 can be visually recognized even when the casing 21 is made of an opaque material (for example, polypropylene or high-density polyethylene). Accordingly, the ring-shaped member 24 in a detached state can be visually recognized (see, for example, FIG. 5), and the thin-walled portion 25 has a function as a window portion through which the ring-shaped member 24 can be visually recognized. Can be said.

  Thus, in the puncture device 2, it becomes impossible to visually recognize the ring-shaped member 24 in the unused state (the state shown in FIG. 1), and the ring-shaped member 24 is visually recognized in the used state (the state shown in FIG. 5). It becomes possible. Thereby, it is possible to easily and reliably distinguish (distinguish) whether the puncture device 2 is unused or used. Therefore, for example, it is possible to reliably prevent the used puncture device 2 from being erroneously attached to the puncture device 10 and puncturing a fingertip using the puncture device 2.

  Further, the thin portion 25 has a long shape when viewed from the outside (for example, when viewed from above in FIG. 1). Thus, although the thin part 25 is formed in a part of the circumferential direction of the side wall of the casing 21 in the illustrated configuration, it is not limited to this, and for example, intermittently in the circumferential direction of the side wall of the casing 21. A plurality of them may be formed, or they may be formed all over the circumferential direction of the side wall of the casing 21.

  When the thin-walled portion 25 is formed on a part of the side wall of the casing 21 in the circumferential direction, it is possible to suppress a decrease in mechanical strength of a portion on the tip side of the locking portion 28 on the side wall of the casing 21. it can.

  Further, when a plurality of thin portions 25 are intermittently formed in the circumferential direction of the side wall of the casing 21, a decrease in mechanical strength at a portion closer to the tip side than the locking portion 28 on the side wall of the casing 21 is suppressed. The ring-shaped member 24 in a detached state can be visually recognized from any direction around the central axis of the casing 21.

  Further, when the thin portion 25 is formed in the entire circumferential direction of the side wall of the casing 21, the ring-shaped member 24 in a detached state can be visually recognized from any direction around the central axis of the casing 21.

  Moreover, it is preferable that the ring-shaped member 24 and the casing 21 (thin wall portion 25) have different colors. Thereby, the ring-shaped member 24 located in a disengaged state, ie, the front end side rather than the latching | locking part 28 of the casing 21, can be visually recognized more reliably.

  The puncture device 2 configured as described above can take three different states (first state (see FIG. 1), second state (see FIG. 3), and third state (see FIG. 5)). it can.

  As shown in FIG. 1, in the first state (unused state), the ring-shaped member 24 is attached to the elastic deformation portion 292 of the puncture needle 22. The puncture needle 22 has a large-diameter portion 294 that is locked to the hub engaging portion 213 of the casing 21, that is, held in the casing 21.

  Further, the needle tip 231 of the puncture needle 22 is located in the casing 21. Thereby, in the unused puncture device 2, unintentional puncture by the puncture needle 22 (needle tip 231) is prevented. That is, the safety of the puncture device 2 in an unused state can be maintained.

  As shown in FIG. 3, in the second state (puncture state), the puncture tool 2 attached to the puncture device 10 has the puncture needle 22 moved in the distal direction by the operation of the plunger 5 of the puncture device 10 ( When pressed, the needle tip 231 protrudes from the opening 211 of the casing 21. The surface of the living body is punctured by the protruding needle tip 231.

  At this time, the ring-shaped member 24 is in an attached state and moves in the distal direction together with the puncture needle 22. This ring-shaped member 24 does not prevent (permit) the movement of the puncture needle 22, and thus the needle tip 231 is reliably projected from the opening 211 of the casing 21.

  Further, the protruding amount (puncture depth) of the needle tip 231 is set by adjusting an adjustment unit 6 of the puncture device 10 described later. Further, the maximum protrusion amount (maximum protrusion length) of the needle tip 231 is such that the distal end surface 242 of the ring-shaped member 24 attached to the elastic deformation portion 292 contacts the proximal end surface 271 of the ring-shaped member contact portion 27. It is regulated by.

  As shown in FIG. 5, in the third state (used state), the ring-shaped member 24 is detached from the elastic deformation portion 292 in the distal direction. The detached ring-shaped member 24 enters between the ring-shaped member abutting portion 27 and the locking portion 28 (or the tip of the elastic deformation portion 292) in the casing 21, and can move in the axial direction therebetween. Therefore, the ring-shaped member contact portion 27 can be contacted. Since the distal end of the elastically deforming portion 292 in the expanded state or the natural state is in contact with the proximal end surface 243 of the contacted ring-shaped member 24, the movement of the puncture needle 22 in the distal direction can be restricted. The needle tip 231 after puncture (after use) is reliably prevented (prevented) from protruding from the opening 211 of the casing 21 and cannot be reused.

  In the puncture device 2 after use, as shown in FIG. 5, the puncture needle 22 can move (slide) with respect to the casing 21. For example, the puncture needle 22 (the large diameter portion 294 of the hub 29) can be used. ) May be locked by the hub engaging portion 213 of the casing 21.

Next, the puncture device 10 will be described.
As shown in FIG. 7 (also in FIG. 8), the housing 3 provided in the puncture device 10 includes a housing main body 30 and a cap-like member 4 provided at the base end portion of the housing main body 30. The housing 3 also has a function as a grip when using the puncture device 10.

  The housing 3 has a hollow portion 31 opened at the distal end. The hollow portion 31 includes a plunger 5, a coil spring 91 that biases the plunger 5 toward the distal end, and a biasing force against the plunger 5 toward the proximal end. A puncture mechanism having a coil spring 92 is installed.

  The casing 21 of the puncture device 2 is detachably attached to the distal end portion 36 of the housing 3. That is, when the puncture device 2 is attached to the puncture device 10, the proximal end portion of the casing 21 is fitted into the distal end portion 36 of the housing body 30.

  As shown in FIGS. 2 to 4, a colored portion 361 is provided on the outer peripheral portion of the distal end portion 36 of the puncture device 10. The colored portion 361 is a portion where the outer peripheral portion of the tip portion 36 is colored from the tip 35 to a position at a predetermined distance.

  When the puncture device 2 is attached to the puncture device 10, the entire coloring portion 361 is covered by the cover portion 216 of the puncture device 2 (casing 21). When it can be visually confirmed that the entire coloring portion 361 is covered in this way, it can be determined that the puncture device 2 is securely attached to the puncture apparatus 10 (the state shown in FIG. 3). . In addition, when a part of the colored portion 361 is still visually recognized when the puncture device 2 is mounted on the puncture device 10, the puncture device 2 is not sufficiently mounted on the puncture device 10 (for example, the puncture device 2 It can be determined that the mounted portion 293 is not sufficiently fitted to the puncture device mounting portion 51).

  A method for forming the colored portion 361 is not particularly limited, and examples thereof include a coating method and a printing method.

  In addition, an elastically deformable plate-like puncture operating portion 7 and an index 33 are provided on the upper side of the housing main body 30 in FIG. The index 33 is arranged on the proximal end side of the puncture operation unit 7.

  An operation button 71 having a protrusion 711 protruding downward in FIG. 7 is formed at the tip of the puncture operation unit 7. An opening 32 larger than the projection 711 and smaller than the operation button 71 is formed at a position corresponding to the projection 711 of the housing body 30.

  A pair of elongated holes 34 are formed on the base end side of the index 33 of the housing body 30 along the circumferential direction. One long hole 34 is disposed on the upper side in FIG. 7, and the other long hole 34 is disposed on the lower side in FIG. 7.

The plunger 5 is installed in the housing 3 so as to be movable in the axial direction.
This plunger 5 has a cylindrical puncture tool mounting portion 51 to which the puncture needle 22 of the puncture tool 2 is detachably mounted at the distal end portion. That is, when the puncture device 2 is attached to the puncture device 10, the proximal end portion (attached portion 293) of the puncture needle 22 is inserted into the distal end portion of the puncture device attachment portion 51.

  Moreover, the plunger 5 has the 1st protrusion 56 standingly arranged toward the lower side in FIG. 7 in the base end part.

  In addition, the plunger 5 has a pair of rod-like projecting portions 52, 52 erected toward the base end side at the base end portion. A protrusion 521 is formed. One protrusion 52 is disposed on the upper side in FIG. 7, and the other protrusion 52 is disposed on the lower side in FIG.

  Further, an elastically deformable rod-shaped lock member 53 is provided on the upper side of the plunger 5 in FIG. Note that the lock member 53 is disposed on the proximal end side of the puncture tool mounting portion 51.

  A locking portion 531 having a protrusion 532 protruding upward in FIG. 7 is formed at the tip of the locking member 53.

  In a state where preparation (set) for puncture described later is completed, the projection 532 of the locking portion 531 is formed in the opening 32 of the housing body 30 in a state where the plunger 5 is biased toward the housing 3 by the coil spring 91. As a result, the locking portion 531 is locked with respect to the housing 3.

  In addition, ring-shaped flanges 54 and 55 are formed on the outer peripheral surface of the plunger 5. The flange 55 is disposed on the proximal end side with respect to the flange 54.

  When the plunger 5 moves, each of the flanges 54 and 55 slides on the inner peripheral surface of the housing body 30, whereby the posture of the plunger 5 is maintained.

  In addition, the proximal end portion of the flange 55 functions as a spring seat with which the distal end side of the coil spring 91 abuts. A tubular adjustment portion (adjustment dial) 6 is installed at the base end portion of the housing body 30 and at the distal end side of the cap-shaped member 4 so as to be rotatable in the circumferential direction of the housing body 30.

  As shown in FIG. 9, a pair of support portions 610 and 610 are formed on the inner peripheral surface of the adjustment portion 6. These support portions 610 are formed with ring-shaped puncture depth control plates (second protrusions) 61 that come into contact with the protrusions 56 of the plunger 5 during puncturing. The pair of support portions 610 and 610 are respectively inserted into the pair of long holes 34 and 34 of the housing main body 30 described above, and the puncture depth control plate 61 is located in the housing main body 30.

  Support portions 610 and 610 are arranged to face each other with the center of puncture depth control plate 61 interposed therebetween. Further, the puncture depth control plate 61 is disposed concentrically with the housing body 30 in the middle of the adjustment unit 6 in the axial direction.

  The puncture depth control plate 61 has a portion in which the axial position of the abutting surface that abuts against the protrusion 56 of the plunger 5 is different, whereby the puncture depth control plate 61 is moved to the surface of the living body by the puncture needle 22 (needle tip 231). Puncture depth (= projection amount of the puncture needle 22 from the opening 211) can be adjusted.

  That is, on the surface on the proximal end side of the puncture depth control plate 61, three convex portions (spacers) 611, 612 and 613 having different heights (lengths in the axial direction) are formed along the circumferential direction. Yes. These convex portions 611, 612 and 613 are arranged in the order of the convex portions 611, 612 and 613 at intervals of 30 ° and in the counterclockwise direction in the drawing on the right side of FIG.

  The height of the convex portions 611 to 613 is the highest in the convex portion 611, the next highest in the convex portion 612, and the lowest in the convex portion 613. In other words, the axial position of the abutment surface of the puncture depth control plate 61 that abuts the protrusion 56 of the plunger 5 at the time of puncture is that the position of the abutment surface in the convex portion 611 is the most proximal side, and the abutment surface in the convex portion 613 The position of the contact surface is the most distal side, and the position of the contact surface at the convex portion 612 is between the convex portion 611 and the convex portion 613.

  Therefore, when the convex portion 611 faces the protrusion 56 of the plunger 5, the puncture depth to the living body surface by the puncture needle 22 is the shallowest (minimum), and hereinafter, the convex portion 612, the convex portion 613, the convex portion The puncture depth by the puncture needle 22 becomes deeper (larger) in the order of the part where no part is formed (the part without the protrusion) 614.

  The adjustment unit 6 and the protrusion 56 of the plunger 5 constitute an adjustment mechanism. By this adjustment mechanism, the amount of protrusion of the puncture needle 22, that is, the surface of the living body, according to the individual difference of the blood sampler (inspected person) and the puncture site The puncture depth can be adjusted.

  A portion on the distal end side of puncture depth control plate 61 functions as a spring seat with which the proximal end side of coil spring 91 abuts. When the puncture device 2 is not attached to the puncture apparatus 10, a coil spring 91 is inserted between the puncture depth control plate 61 and the flange 55 in a substantially unloaded state (natural length).

  In addition, four ribs 621, 622, 623, and 624 having different lengths are formed on the outer peripheral surface of the adjusting portion 6, respectively.

  These ribs 621, 622, 623, and 624 are arranged at intervals of 30 ° (the same angular intervals as the convex portions 611, 612, and 613) and in the counterclockwise direction in the drawing on the right side of FIG. They are arranged in the order of 622, 623, and 624.

  Specifically, the rib 621 is arranged at a position shifted from the convex portion 611 by 180 ° in the circumferential direction. That is, the rib 621 is disposed so as to be located at the position of the index 33 when the convex portion 611 faces the protrusion 56 of the plunger 5.

  Similarly, the ribs 622, 623, and 624 are arranged at positions shifted by 180 ° in the circumferential direction from the convex portions 612, 613 and the portion 614 where the convex portions are not formed, respectively. That is, the ribs 622, 623, and 624 are positioned at the position of the index 33 when the convex portions 612, 613 and the portion 614 where the convex portions are not formed face the protruding portion 56 of the plunger 5, respectively. Is arranged.

  The ribs 621 to 624 have the longest rib 624, the second longest rib 623, the third longest rib 622, and the shortest rib 621. The length of the rib indicates the level of puncture depth by the puncture needle 22. That is, the longer the rib length, the deeper the puncture depth on the living body surface by the puncture needle 23.

  Further, on the distal end side of the ribs 621, 622, 623, and 624 on the outer peripheral surface of the adjusting portion 6, numbers “1”, “2”, “ "3" and "4" are attached.

  In addition, a plurality of grooves 63 are juxtaposed along the circumferential direction on the outer peripheral surface of the adjusting portion 6. These grooves 63 and ribs 621 to 624 each function as a slip stopper when the adjustment unit 6 is rotated.

  As shown in FIG. 7, a set operation unit 8 is installed in the cap-shaped member 4 so as to be movable in the axial direction.

  At the tip of the cap-shaped member 4, a ring-shaped rib 41 with which the tip of the setting operation unit 8 abuts is formed.

  Further, a head (position restricting means) 42 is formed at the base end of the cap-shaped member 4. When the set operation unit 8 is operated, the base end of the set operation unit 8 comes into contact with the head portion 42 to prevent the set operation unit 8 from moving in the base end direction.

  Further, elongated holes 43 are formed on the upper and lower sides of the cap-shaped member 4 in FIG.

  The set operation unit 8 includes a cylindrical set operation unit main body 80 that houses the coil spring 92.

  A ring-shaped rib 81 is formed at the tip of the set operation unit main body 80. A portion on the proximal end side of the rib 81 functions as a spring seat with which the distal end side of the coil spring 92 abuts.

  Further, on the upper side and the lower side in FIG. 7 of the base end portion of the set operation unit main body 80, a handle portion (finger holding portion) 82 inserted into the corresponding long hole 43 of the cap-like member 4 is formed. . The upper handle portion 82 in FIG. 7 protrudes from the elongated hole 43 to the upper side (outer side) in FIG. 7, and the lower handle portion 82 in FIG. 7 protrudes from the elongated hole 43 to the lower side (outer side) in FIG. Yes.

  Further, a ring-shaped spring receiving member 93 having a spring seat on the front end side is installed in the set operation unit 8 so as to be movable in the axial direction.

  When the puncture device 2 is not attached to the puncture apparatus 10, the coil spring 92 is inserted between the spring receiving member 93 and the rib 81 in a substantially unloaded state (natural length). The coil spring 92 is located on the proximal end side with respect to the coil spring 91. Further, the spring constant of the coil spring 92 is smaller than the spring constant of the coil spring 91.

  The spring receiving member 93 is locked by a pair of protrusions 521 and 521 in a state where the pair of protrusions 52 and 52 of the plunger 5 are inserted.

  The conditions such as the spring constants and axial lengths of the coil springs 91 and 92 are set so that the puncture can be performed reliably, that is, the puncture needle 22 is surely removed from the opening 211 of the casing 21 during the puncture. The puncture needle 22 is set so that it protrudes by a predetermined amount and then is securely accommodated in the casing 21.

  Next, the operation procedure and the operation of each part when the puncture device 2 is attached to the puncture apparatus 10 and puncture the surface of the living body will be described.

  [1] First, the puncture device 2 in the first state (the state shown in FIG. 1 (unused state)) is attached to the distal end portion 36 of the puncture device 10. That is, until the rib 215 of the casing 21 abuts on the distal end 35 of the housing 3, the proximal end portion of the casing 21 is fitted into the distal end portion 36 of the housing 3, and at the distal end portion of the puncture implement mounting portion 51 of the plunger 5. Then, the proximal end portion of the puncture needle 22 is inserted (for example, see FIG. 2).

  At this time, as described above, since the large-diameter portion 294 of the puncture needle 22 is locked to the hub engagement portion 213 of the casing 21, the puncture needle 22 does not move in the distal direction unless a force exceeding a predetermined value is applied. It does not move, and the flange 55 of the plunger 5 is in contact with the tip of the coil spring 91.

  By setting the force for moving the large-diameter portion 294 of the puncture needle 22 from the hub engaging portion 213 to be larger than the force for compressing the coil springs 91 and 92, the distal end portion of the puncture tool mounting portion 51 of the plunger 5 At the same time, the plunger 5 can be moved in the proximal direction against the elastic force of the coil springs 91 and 92 by inserting the proximal end portion of the puncture needle 22 into the locking portion 53 of the plunger 5. The protrusion 532 of 531 is inserted into the opening 32 of the housing 3, and preparation (set) for puncture is completed. Further, by pushing the puncture needle 22 in the proximal direction, the large diameter portion 294 of the puncture needle 22 is engaged with the hub. It moves from the part 213 and is released from the engagement with the hub engaging part 213. The puncture device 2 stops when the proximal side surface of the rib (flange) 215 comes into contact with the distal end 35 of the housing body 30.

  Thereby, the to-be-attached part 293 of the puncture needle 22 can be reliably (easily) fitted in the puncture tool attaching part 51 of the plunger 5. In addition, preparation for puncture can be performed easily, quickly and reliably.

  In addition, when the puncture device 2 is attached, it is confirmed that the cover portion 216 of the casing 21 covers the entire coloring portion 361 of the distal end portion 36 of the puncture device 10. When the entire coloring portion 361 is covered, the puncture device 2 is securely attached to the puncture apparatus 10.

  Further, by the operation of attaching the puncture device 2 to the puncture device 10, the ring-shaped member 24 mounted on the elastic deformation portion 292 gets over the locking portion 28 from the proximal end side to the distal end side, and the ring-shaped member contact portion 27 and the locking portion 28 (see FIGS. 2 and 7). Since the contact between the base end surface 243 of the ring-shaped member 24 and the distal end surface 295a of the hub body 291 is performed substantially perpendicular to the moving direction of the puncture needle 22, the ring-shaped member 24 gets over the locking portion 28. When it hits, it does not leave to the base end side.

  The angle at which the base end surface 243 of the ring-shaped member 24 contacts the hub 29 is preferably 70 to 150 degrees from the distal direction of the puncture needle 22, and more preferably 90 to 120 degrees.

  In the puncture device 10 in a state in which the puncture tool 2 is not attached, the lock member 53 of the plunger 5 has the protrusion 532 of the locking portion 531 abutting against the inner peripheral surface of the housing 3, so that the right side in FIG. Is displaced (elastically deformed). That is, the locking portion 531 is biased downward in FIG. 7 by the elastic force of the lock member 53.

  [2] If necessary, the puncture depth to the surface of the living body by the puncture needle 22 (needle tip 231) is adjusted. That is, the puncture depth on the surface of the living body by the puncture needle 22 is set to a puncture depth corresponding to the individual difference of the blood sampler and the puncture site.

  As a reference for setting the puncture depth, for example, the puncture depth at which a minimum blood volume necessary for blood glucose measurement can be obtained can be used. Thereby, the pain at the time of puncture can be suppressed to the minimum necessary.

  When setting the puncture depth, the adjustment unit 6 is grasped with a finger, the adjustment unit 6 is rotated in the circumferential direction with respect to the housing 3, and a predetermined rib among the ribs 621 to 624 is moved to the index 33. Position.

  Since the puncture depth is set once, it does not need to be reset every time blood is collected, so that the operation is not time-consuming.

  7 and 8 show a state where the puncture depth to the living body surface by the puncture needle 22 is the shallowest.

  [3] After the tip (opening 211) of the casing 21 of the puncture device 2 in the state shown in FIG. 7 (also in FIG. 2) is pressure-bonded to a predetermined part, for example, the surface of a living body such as a fingertip, the puncture operation unit 7 is operated. The button 71 is pressed (pressed downward in FIG. 7).

  When the operation button 71 is pressed, as shown in FIG. 8, the projection 711 presses the projection 532 of the latching portion 531, whereby the lock member 53 is elastically deformed, and the latching portion 531 is lower in FIG. Is disengaged (released) from the edge facing the opening 32 of the protrusion 532 of the locking portion 531.

  On the other hand, the puncture operation unit 7 is elastically deformed, and when the finger is released from the operation button 71, the puncture operation unit 7 that has been elastically deformed returns to its original shape due to its elastic force.

  When the locking of the locking portion 531 is released, as shown in FIG. 8 (FIG. 3), the compressed coil spring 91 is extended by its elastic force, and the plunger 5 moves in the distal direction, and the puncture needle 22 is moved. The needle tip 231 protrudes from the opening 211 of the casing 21 and punctures the surface of the living body. That is, the puncture device 2 is in the second state.

  In addition, since the protrusion 56 of the plunger 5 abuts against the convex portion 611 of the puncture depth control plate 61, the movement of the plunger 5 in the distal direction is restricted, so that the puncture depth on the living body surface by the puncture needle 22 is , Adjusted to a constant (minimum value).

  Further, when the plunger 5 moves in the distal direction, the coil spring 91 and the flange 55 are separated in the middle of the movement, and the coil spring 92 is compressed. The plunger 5 is moved in the proximal direction with respect to the housing 3 by the coil spring 92. To be energized.

  In this case, as described above, since the spring constant of the coil spring 91 is larger than the spring constant of the coil spring 92, the plunger 5 moves toward the distal end against the elastic force of the coil spring 92, and the living body surface is moved by the puncture needle 22. Can be punctured.

  Further, the coil spring 91 returns to the natural length after being separated from the flange 55, and does not urge the plunger 5 in either the front end or the base end.

  After the puncture needle 22 punctures the living body surface, the compressed coil spring 92 is extended by its elastic force, the plunger 5 moves in the proximal direction, the puncture needle 22 comes off from the living body surface, and the puncture needle 22 And stored (stored) in the casing 21.

  [4] After puncturing, the puncture device 1 is separated from the surface of the living body, and blood on the puncture site is collected. The blood can be collected, for example, by supplying blood directly onto the test paper or sucking it through a thin tube and supplying it to the test paper.

  [5] Even if the operation button 71 is accidentally pressed before puncturing the living body surface, the puncture needle 22 can be reset. The handle portion 82 of the set operation portion 8 is held with a finger, and the set operation portion 8 is moved in the proximal direction against the housing 3 against the elastic force of the coil springs 91 and 92. Then, when the proximal end of the set operation portion 8 comes into contact with the head portion 42 of the housing 3, the finger is released from the grip portion 82 that has been gripped.

  In this case, first, the coil spring 92 with a small spring constant is compressed, then the coil spring 91 with a large spring constant is compressed, and the plunger 5 moves in the proximal direction as the coil spring 91 is compressed.

  When the base end of the setting operation portion 8 moves until it abuts against the head portion 42 of the housing 3, the protrusion 532 of the locking portion 531 of the locking member 53 of the plunger 5 is positioned on the right side of the opening 32 of the housing 3 and elastically deforms. The locked lock member 53 returns to its original shape due to its elastic force, the projection 532 is inserted into the opening 32 of the housing 3, and the projection 532 abuts (or faces) the projection 711 of the operation button 71 (see FIG. 7). ).

  Then, when the finger is released from the grip portion 82 that has been gripped, the protrusion 532 of the locking portion 531 comes into contact with the edge on the front end facing the opening 32 of the housing 3 as shown in FIG. The portion 531 is locked (locked) with respect to the housing 3, whereby the compressed state of the coil spring 91, that is, the state in which the plunger 5 is urged toward the distal end with respect to the housing 3 by the coil spring 91 is maintained.

  On the other hand, when the finger is released from the grip portion 82 that has been gripped, as shown in FIG. 7, the compressed (compressed) coil spring 92 expands due to its elastic force, and the set operation portion 8 has its rib 81. Moves to the tip side until it contacts the rib 41 of the housing 3. Further, the coil spring 92 returns to the natural length and does not urge the plunger 5 in either the front end or the base end.

  In this state, preparation (set) for puncturing the surface of the living body is completed. Thus, the puncture device 10 can easily, quickly and reliably prepare for puncture on the surface of a living body.

  [6] After this (after use), the puncture device 2 is removed from the puncture apparatus 10 and discarded. In order to remove the puncture device 2 from the puncture apparatus 10, the puncture apparatus 10 is pulled in the proximal direction with the other hand while holding the casing 21 with one hand.

  At this time, as described above, the ring-shaped member 24 moves (pulled) together with the puncture needle 22 in the proximal direction, but is locked by the locking portion 28 and further movement is restricted.

  Further, the puncture needle 22 further moves in the proximal direction together with the puncture device 10, and finally the elastic deformation portion 292 is in a reduced diameter state, and the ring-shaped member 24 is detached from the elastic deformation portion 292 in that state (FIG. 4). Thereafter, the large-diameter portion 294 is locked (engaged) with the hub engaging portion 213 of the casing 21 and the further movement of the puncture needle 22 is restricted, that is, the detachment from the base end side of the casing 21. Is blocked. Note that the force for detaching the hub 29 from the distal end portion of the puncture tool mounting portion 51 is set to be larger than the force for detaching the ring-shaped member 24 from the elastic deformation portion 292. Thereby, the ring-shaped member 24 can be reliably detached from the elastic deformation portion 292 before the puncture needle 22 is detached from the plunger 5.

  Furthermore, the puncture device 2 is removed from the puncture device 10 by pulling the puncture device 10 in the proximal direction. At that time, the puncture device 2 is in the third state (see FIG. 5). At this time, in the puncture device 2, the ring-shaped member 24 in a detached state can be visually recognized through the thin portion 25 of the casing 21. Thereby, it can be surely recognized that the puncture device 2 has been used.

  Since the needle tip 231 does not protrude from the opening 211, even when the puncture device 2 is discarded, the skin or the like is not accidentally damaged, and infection can be prevented.

  The puncture device 2 of the present invention is not limited to application to blood collection as in this embodiment, and can be applied to, for example, collection of body fluid such as interstitial fluid.

<Second Embodiment>
FIG. 10 is a longitudinal sectional view showing a second embodiment of the puncture device of the present invention.

  Hereinafter, the second embodiment of the puncture device of the present invention will be described with reference to this figure, but the description will focus on the differences from the above-described embodiment, and the description of the same matters will be omitted.

This embodiment is the same as the first embodiment except that the formation position of the thin portion is different.
In the puncture device 2 </ b> A shown in FIG. 10, the thin portion 25 </ b> A (window portion) is formed in a portion from the vicinity of the base end side to the rib 215 with respect to the locking portion 28 of the casing 21.

The ring-shaped member 24 in the mounted state can be visually recognized through the thin portion 25A.
Thereby, in puncture device 2A, it becomes possible to visually recognize ring-shaped member 24 in an unused state (the state shown in FIG. 10), and it becomes impossible to visually recognize ring-shaped member 24 in a used state. Therefore, it is possible to easily and reliably distinguish (distinguish) whether the puncture device 2A is unused or used.

  Even if the user of the puncture device 2A mistakenly recognizes that the puncture device 2A when the ring-shaped member 24 can be visually recognized is used, the puncture device 2A is simply discarded. Only. For this reason, as a result, the puncture device 2A is safer in use (for example, the risk of blood infection is prevented).

<Third Embodiment>
FIG. 11 is a longitudinal sectional view showing a third embodiment of the puncture device of the present invention.

Hereinafter, the third embodiment of the puncture device of the present invention will be described with reference to this figure, but the description will focus on the differences from the above-described embodiment, and the description of the same matters will be omitted.
This embodiment is the same as the first embodiment except that the formation position of the thin portion is different.

  In the puncture device 2B shown in FIG. 11, the thin portion 25B (window portion) extends from the distal end portion of the casing 21 to the rib 215, that is, from the distal end side to the proximal end side of the locking portion 28 of the casing 21. Is formed.

  Through the thin wall portion 25B, the ring-shaped member 24 in the mounted state (the state shown in FIG. 11) and the detached state, that is, the position of the ring-shaped member 24 with respect to the casing 21 can be visually confirmed. Depending on the position of the ring-shaped member 24, it is possible to easily and reliably distinguish (distinguish) whether the puncture device 2B is unused or used.

  Moreover, in the puncture device 2B, it can be confirmed before use of the puncture device 2B whether or not the ring-shaped member 24 exists (is installed). When the ring-shaped member 24 is installed, the puncture device 2B can be used as described above. In addition, when the ring-shaped member 24 is not installed, it is possible to visually confirm that the puncture device 2B is defective (unqualified product) before using the puncture device 2B. Dispose of in use. Thus, the puncture device 2B can be used safely.

<Fourth embodiment>
FIG. 12 is a longitudinal sectional view showing a fourth embodiment of the puncture device of the present invention.

Hereinafter, the fourth embodiment of the puncture device of the present invention will be described with reference to this figure, but the description will focus on the differences from the above-described embodiment, and the description of the same matters will be omitted.
This embodiment is the same as the first embodiment except that the configuration of the window is different.

  In the casing 21 of the puncture device 2C shown in FIG. 12, an opening 217 penetrating the side wall is formed in a portion on the tip side of the locking portion 28 of the side wall of the casing 21. Further, the opening 217 is formed with a stepped portion 218 whose thickness is changed at the edge thereof.

  A transparent body 20 made of a substantially transparent material is fixed to the opening 217. The transparent body 20 is composed of a plate piece. The transparent body 20 is formed with a step portion 201 having a changed thickness at the edge thereof.

  In the puncture device 2C, the stepped portion 201 of the transparent body 20 and the stepped portion 218 of the opening 217 of the casing 21 are engaged. Thereby, the transparent body 20 is reliably fixed to the casing 21, and therefore, the unintentional detachment of the transparent body 20 can be prevented.

  The ring-shaped member 24 in a detached state can be visually recognized through such a transparent body 20.

  In this puncture device 2C, it becomes impossible to visually recognize the ring-shaped member 24 in an unused state (the state shown in FIG. 12), and the ring-shaped member 24 can be visually recognized in a used state. Thereby, it is possible to easily and reliably distinguish (distinguish) whether the puncture device 2C is unused or used.

  In addition, although it does not specifically limit as a constituent material of the transparent body 20, For example, a polycarbonate, a polymethylmethacrylate, a polystyrene, a polyethylene terephthalate, a polyethylene naphthalate etc. are mentioned.

  In addition, the casing 21 has a part made of a substantially transparent material in the configuration of FIG. 12, that is, the casing 21 has a transparent body 20 installed on a part thereof. However, the entire casing 21 may be made of a substantially transparent material.

<Fifth Embodiment>
FIG. 13 is a longitudinal sectional view showing a fifth embodiment of the puncture device of the present invention.

  Hereinafter, the fifth embodiment of the puncture device of the present invention will be described with reference to this figure, but the description will focus on the differences from the above-described embodiment, and the description of the same matters will be omitted.

  This embodiment is the same as the first embodiment except that the puncture device further has a cap.

  The puncture device 2D shown in FIG. 13 has a cap 50 that can be attached to the tip of the casing 21.

  The cap 50 includes a cap main body 501 having a bottomed cylindrical shape, and a sealing portion 502 formed inside the cap main body 501.

  A pair of openings 503 penetrating the side wall (wall portion) of the cap main body 501 are formed. When the cap 50 is mounted on the casing 21, the inner peripheral portion on the base end side of each opening 503 of the cap body 501 is fitted into the outer diameter constant portion 219 b of the casing 21.

  The sealing portion 502 is a cylindrical portion and is formed to protrude from the bottom of the cap body 501. When the cap 50 is mounted on the casing 21, the sealing portion 502 is inserted into the opening 211 of the casing 21 and hermetically seals the opening 211.

  A pair of small pieces 504 are formed at the base end of the sealing portion 502 so as to face each other. Each small piece 504 is inclined outward with respect to the central axis of the sealing portion 502.

  Such a small piece 504 engages with the third tapered portion 219 d of the casing 21 when the cap 50 is mounted on the casing 21. Thereby, it is possible to prevent the cap 50 from being unintentionally detached from the casing 21.

  Further, when removing the cap 50 from the casing 21, each small piece 504 can be elastically deformed so as to be inclined inward and can be easily removed. Thereafter, the posture of each small piece 504 is restored, that is, the small piece 504 is inclined outward with respect to the central axis of the sealing portion 502.

  Even if the removed cap 50 is to be attached to the casing 21 again, each small piece 504 is inclined outward, so that it abuts against the end surface of the opening 211 and each small piece 504 is placed in the opening 211 of the casing 21. It becomes impossible to insert. Thereby, the operation of attaching the cap 50 to the casing 21 again can be reliably prevented.

  As mentioned above, although the puncture device of this invention was demonstrated about embodiment of illustration, this invention is not limited to this, Each part which comprises a puncture device of the arbitrary structures which can exhibit the same function Can be substituted. Moreover, arbitrary components may be added.

  Further, the puncture device of the present invention may be a combination of any two or more configurations (features) of the above embodiments.

  For example, the transparent body of the fourth embodiment is installed at a portion closer to the tip side than the locking portion of the side wall of the casing, but is not limited to this, for example, like the thin wall portion of the second embodiment. In addition, it may be installed at a portion closer to the base end side than the locking portion of the side wall of the casing, or from the front end side to the base end side of the locking portion of the side wall of the casing as in the third embodiment. It may be installed.

  Moreover, you may mount | wear with the cap of the said 5th Embodiment to the casing of the said 2nd Embodiment-the said 4th Embodiment, respectively.

  Moreover, the elastically deformable portion is not limited to being configured by two protruding portions that are separated from each other, and may be configured by, for example, three or more protruding portions.

  The planar shape of the ring-shaped member may be, for example, an O-shape, or a shape in which a part thereof is missing, that is, a C-shape.

It is a longitudinal cross-sectional view which shows 1st Embodiment of the puncture device of this invention. It is a longitudinal cross-sectional view which shows 1st Embodiment of the puncture device of this invention. It is a longitudinal cross-sectional view which shows 1st Embodiment of the puncture device of this invention. It is a longitudinal cross-sectional view which shows 1st Embodiment of the puncture device of this invention. It is a longitudinal cross-sectional view which shows 1st Embodiment of the puncture device of this invention. It is the sectional view on the AA line in FIG. It is a figure (longitudinal sectional view) for demonstrating the method of mounting | wearing and using the puncture device (1st Embodiment) of this invention to a puncture apparatus. It is a figure (longitudinal sectional view) for demonstrating the method of mounting | wearing and using the puncture device (1st Embodiment) of this invention to a puncture apparatus. It is a figure which shows the structure (side surface and both end surfaces) of the adjustment part with which the puncture apparatus shown to FIG. 7 and FIG. 8 is provided. It is a longitudinal cross-sectional view which shows 2nd Embodiment of the puncture device of this invention. It is a longitudinal cross-sectional view which shows 3rd Embodiment of the puncture device of this invention. It is a longitudinal cross-sectional view which shows 4th Embodiment of the puncture device of this invention. It is a longitudinal cross-sectional view which shows 5th Embodiment of the puncture device of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Puncture device 2, 2A, 2B, 2C, 2D Puncture tool 20 Transparent body 201 Step part 21 Casing 211 Opening (tip opening)
213 Hub engaging part 214 Opening (base end opening)
215 Rib (flange)
216 Cover part 217 Opening part 218 Step part 219a First taper part 219b Constant outer diameter part 219c Second taper part 219d Third taper part 22 Puncture needle 23 Needle body 231 Needle tip 24 Ring-shaped member 241 Inner circumference (inner Circumference)
242 Front end surface 243 Base end surface 25, 25A, 25B Thin portion 26 Inner peripheral portion 27 Ring-shaped member abutting portion 271 Base end surface 28 Locking portion (reduced diameter portion)
281,282 Inclined surface 29 Hub (needle hub)
291 Hub body 292 Elastic deformation portion 292a Outer periphery (outer periphery)
292b Mounting portion 292c Protruding portion 293 Mounted portion 294 Large diameter portion 294a Base end surface 295 Small diameter portion 295a Tip surface 296 Tapered surface 297 Notch 3 Housing 30 Housing body 31 Hollow portion 32 Opening 33 Index 34 Long hole 35 Tip 36 Tip 361 Colored portion 4 Cap-shaped member 41 Rib 42 Head 43 Long hole 5 Plunger 51 Puncture attachment portion 52 Projection portion 521 Projection 53 Lock member 531 Locking portion 532 Projection 54, 55 Flange 56 First projection 6 Adjusting portion 61 Puncture Depth control plate (second protrusion)
610 Supporting part 611-613 Convex part (spacer)
614 Portions where convex portions are not formed 621 to 624 Rib 63 Groove 7 Puncture operation part 71 Operation button 711 Projection 8 Set operation part 80 Set operation part main body 81 Rib 82 Handle part (finger part)
91, 92 Coil spring 93 Spring receiving member 50 Cap 501 Cap body 502 Sealing portion 503 Opening portion 504 Small piece t ₁ , t ₂ thickness θ angle

Claims (15)

A puncture device used detachably attached to the tip of a puncture device,
A needle body having a sharp needle tip at the tip, and an elastic deformation portion fixed to the base end portion of the needle body and elastically deformable so as to be displaced with respect to the needle body are provided on the tip side. A puncture needle having a needle hub,
A casing having a tubular shape that houses the puncture needle so as to be movable in the longitudinal direction and has a tip opening from which the needle tip can protrude;
The outer peripheral portion of the elastic deformation portion is detachably mounted in the distal direction, and in the mounted state attached to the elastic deformation portion, the puncture needle is allowed to move in the distal direction, and the needle tip of the casing is A ring that enables protrusion from the distal end opening and restricts movement of the puncture needle in the distal end direction and prevents protrusion of the needle tip from the distal end opening of the casing in a detached state in which the protrusion is detached from the elastically deformable portion. And a member
The casing has a window part through which the ring-shaped member can be visually recognized.   The puncture device according to claim 1, wherein the window portion is provided at a position where the ring-shaped member in the mounted state is visible.   The puncture device according to claim 1, wherein the window portion is provided at a position where the ring-shaped member in the detached state is visible.   The puncture device according to claim 1, wherein the window portion is provided at a position where the ring-shaped member in the mounted state and the detached state can be visually recognized. The casing is formed on the inner peripheral portion thereof, and has a reduced diameter portion whose inner diameter is reduced.
2. The puncture according to claim 1, wherein the puncture needle moves in the proximal direction with respect to the casing, so that the ring-shaped member in the mounted state comes into contact with the reduced diameter portion and is detached from the elastic deformation portion. Ingredients.   The puncture device according to claim 5, wherein the window portion is located on a proximal end side with respect to the reduced diameter portion.   The puncture device according to claim 5, wherein the window portion is located on a distal end side with respect to the reduced diameter portion.   The puncture device according to claim 5, wherein the window portion is provided from the distal end side to the proximal end side of the reduced diameter portion.   The puncture device according to any one of claims 1 to 8, wherein the window portion is a portion made of a substantially transparent material on a side wall of the casing.   The puncture device according to any one of claims 1 to 9, wherein the window portion includes a thin portion formed on a side wall of the casing.   The puncture device according to any one of claims 1 to 10, wherein the window portion is provided in a part or all of a circumferential direction of a side wall of the casing.   The puncture device according to any one of claims 1 to 11, wherein the ring-shaped member and the casing have different colors. The tip of the puncture device is provided with a colored portion that colors the tip.
The casing includes a flange portion that comes into contact with a tip of the puncture device when the puncture device is attached to the puncture device, and a cover portion that is formed at an edge portion of the flange portion and covers substantially all of the coloring portion. The puncture device according to claim 1, comprising: The inner peripheral portion of the ring-shaped member has a tapered shape in which the inner diameter gradually increases toward the distal end direction,
The puncture device according to any one of claims 1 to 13, wherein an outer peripheral portion of the elastically deformable portion has a tapered shape in which an outer diameter gradually increases in a distal direction.   The puncture device according to any one of claims 1 to 14, wherein the elastically deforming portion includes a plurality of protrusions spaced apart from each other.

Images