JP2008302134A - Puncture tool and puncture device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a puncture tool capable of preventing erroneous puncturing, relieving pain in puncturing, reducing the size of a puncturing device, and performing highly accurate puncturing. <P>SOLUTION: The puncture tool includes: a main body 13 formed in a columnar shape; a puncture tool 11 projected in one end surface 13a of the main body 13 in the axial line direction; and an elastic body 15 whose front end part 15a is attached onto one end surface 13a of the main body 13, which stores the puncture tool 11 in an insertion part 19 formed in the axial line direction, and enables the tip of the puncture tool 11 to be projected from a front end surface 20 by compression deformation in the axial line direction. An annular recessed groove 21 which is concentric with the insertion part 19 is formed in the front end surface 20 of the elastic body 15. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a puncture device that punctures a subject with a puncture device and a puncture device that performs puncture using the puncture device.

  In recent years, it has become possible to diagnose various diseases without sending blood obtained by self-collection to a laboratory in order to know the health condition. This self-collection is performed using a puncture device provided with a puncture needle. The puncture tool is used by being loaded into a puncture device that pushes a puncture needle against a subject (body surface) so as to protrude. Specifically, with the tip of the puncture device pressed against the body surface, the operation button is operated to project the puncture needle from the puncture device, puncture the skin with the puncture needle, and then bleed from the puncture hole. The puncture device includes a pressing spring for projecting the puncture needle, and a return spring for retracting the puncture tool in the direction opposite to the pressing direction and pulling out the puncture needle from the body surface. Next, the component measuring means is brought into contact with the bleeding puncture hole. The component measuring means includes a reagent that reacts with an electroactive compound in blood, and measures various components by measuring electrical characteristics such as current flow.

  The puncture device has a protective cover for inserting the tube portion into the puncture needle (see Patent Document 1). By protecting the protective cover by covering it with a puncture needle (puncture device), the user is not accidentally injured. Since the puncture device is disposed of disposable, it is generally performed at the time of disposal that the used puncture device is covered with a protective cover so that the disposal contractor does not accidentally puncture the skin with the puncture device. Yes.

International Publication No. 2002/056769 Pamphlet

However, in the conventional puncture device, when the user tried to cover the used puncture device with a protective cover, a new problem that the fingertip poke with the puncture device occurred. Even if the protective cover is inserted into the puncture device and discarded, the protective cover may come off and the puncture device may be exposed.
In addition, in the conventional puncture device, since only the puncture device is directly inserted into the body surface during use, there is a possibility that the sensation concentrates only on the puncture portion and the pain is likely to be amplified.
Furthermore, since the conventional puncture tool needs to include a return spring in the puncture device, the structure of the puncture device is complicated, and it has become an obstacle to downsizing the puncture device.
In addition, when a finer puncture device is used, it is difficult to press the puncture device perpendicularly to the body surface.
The present invention has been made in view of the above situation, and an object thereof is to provide a puncture device that does not puncture accidentally, and to provide a puncture device that can be simplified in size and reduced in size. .

The above object of the present invention is achieved by the following configuration.
(1) a main body having a puncture device at the tip;
An elastic body having an insertion portion attached to the main body and capable of accommodating the puncture device;
A puncture device characterized in that the elastic body is compressed and deformed in the axial direction of the puncture device so that the tip of the puncture device can protrude.

  According to this puncture device, the puncture device is covered with the elastic body by inserting the puncture device into the insertion portion of the elastic body attached to the main body. When the elastic body is pressed against the subject, the elastic body is compressed and deformed in the axial direction, and only the tip of the puncture device protrudes from the elastic body. Therefore, before the puncture, the elastic body is surely pressed against the subject. In addition, the puncture device after puncture is pulled out from the subject by the restoring force after compression deformation of the elastic body.

(2) An annular groove that is concentric with the insertion portion is formed on the front end surface of the elastic body, and a ventilation groove that extends between the annular groove and the outer peripheral surface of the elastic body on the annular front end surface outside the annular groove. The puncture device according to (1), wherein: is formed.

  According to this puncture device, since the fragile portion is formed so as to surround the insertion portion by the annular concave groove, the annular fragile portion around the insertion portion is uniformly deformed, and the puncture side of the insertion portion The opening can approach the subject with high perpendicularity. In addition, the annular groove can be opened to the outside through the ventilation groove in a state where the front end surface of the elastic body is closed by the subject. As a result, the sealed annular concave groove is pressed and deformed to increase the internal pressure, and this internal pressure becomes a resistance at the time of puncturing, and it is prevented that the sample does not easily flow out of the puncture hole.

(3) The puncture device according to (1), wherein a protective film for sealing the insertion portion is provided on an annular front end surface outside the annular groove.

  According to this puncture device, when the elastic body is compressed and deformed and the puncture device is relatively projected, the tip of the puncture device is projected through the protective film provided on the front end surface of the elastic body. Therefore, the puncture device is accommodated in the insertion portion sealed by the protective film until just before use, and adhesion of bacteria, viruses, and the like is prevented. Thereby, even when the puncture device is not used promptly after opening a package or the like, a high antibacterial effect can be maintained.

(4) The puncture device according to (3), wherein the protective film is recessed closer to the main body than the annular front end surface.

  According to this puncture device, when the elastic body is compressed and deformed and the puncture device is relatively projected, the tip of the puncture device is projected through the protective film provided on the front end surface of the elastic body. At this time, since the protective film is recessed from the annular front end surface in contact with the subject, the puncture instrument penetrating portion of the protective film does not contact the subject. Thereby, even if the surface of the protective film is contaminated, it is possible to prevent the contaminant from adhering to the puncture hole.

(5) The puncture device according to (1), wherein the elastic body is equipped with a protective film that seals the insertion portion by integral molding.

  According to this puncture device, when the elastic body is compressed and deformed and the puncture device is relatively projected, the tip of the puncture device is projected through the protective film provided on the front end surface of the elastic body. In this case, since the elastic body integrally forms the protective film, the elastic body can be easily covered only by inserting the puncture instrument into the insertion portion.

(6) The puncture device according to any one of the above (1) to (5) can be loaded, and the loaded puncture device is pressed against the subject by a built-in biasing means, so that the elastic body is A puncture apparatus, wherein the puncture device of the puncture device is compressed and deformed to protrude from the elastic body.

  According to this puncture device, when the urging means applies a pressing force to the subject with the puncture tool to compress and deform the elastic body, the tip of the needle instrument protrudes from the elastic body and punctures the subject. Next, when the pressing force by the urging means is released to restore the compression deformation of the elastic body, the restoring force of the elastic body pulls out the puncture device from the subject. That is, in the puncture device, the return spring of the conventional device can be omitted because the puncture device is pulled out of the subject by the restoring force of the elastic body, so that the device can be simplified and miniaturized.

  According to the puncture device of the present invention, an elastic body that allows the distal end of the puncture device to protrude from the front end surface by compression deformation is attached to one end surface of the main body, and an insertion portion is provided on the front end surface of the elastic body. Since the concentric circular concave groove is formed, the puncture device is covered with an elastic body when not in use, so that puncture is not accidentally performed.

Hereinafter, preferred embodiments of a puncture device according to the present invention will be described with reference to the drawings. The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the meanings described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.
FIG. 1 is an explanatory diagram showing a cross section parallel to the axis of the puncture device according to the present invention.
The puncture device 100 according to the present embodiment is loaded in the puncture device shown in FIG. 6, and allows a sample (eg, blood) to be collected by puncturing the subject with the projected puncture device 11. The puncture device 100 can be suitably used for blood collection such as blood glucose measurement.

  The puncture device 100 includes a main body 13 that is formed in a column shape and has a puncture device 11 protruding from a front end portion (front end portion), and an elastic body 15 having a rear end portion 15a attached to one end surface 13a of the main body 13. Configured. The main body 13 has a cylindrical shape made of a synthetic resin material, and has an engagement portion 33 with a reduced diameter on the one end face 13a side. Two annular protrusions 33 a are formed on the outer peripheral surface of the engaging portion 33. A fitting hole 31 for press-fitting the engaging portion 33 of the main body 13 is formed in the rear end portion 15 a of the elastic body 15, and the convex portion 33 a of the engaging portion 33 is engaged with the inner peripheral surface of the fitting hole 31. An inner circumferential groove 31a to be joined is formed. The elastic body 15 is attached to the main body 13 by inserting the engaging portion 33 into the fitting hole 31 and engaging the convex portion 33a with the inner circumferential groove 31a. Even if the inner circumferential groove 31a is omitted, the inner circumferential surface of the elastic body 15 can be locally elastically deformed by pressing by the convex portion 33a, and the convex portion 33a can be substantially locked. The puncture device 11 protrudes from the distal end portion of the engaging portion 33 in the axial direction. The puncture device 11 preferably has a diameter of 1000 μm or less. As the puncture device 11, for example, a solid needle such as a lancet needle can be used in addition to a hollow needle such as an injection needle.

  The elastic body 15 is formed in a columnar shape, and the dimension in the axial direction is longer than the length to the tip of the puncture device 11. That is, the puncture device 11 is accommodated in the insertion portion 19 formed in the elastic body 15. The insertion part 19 is formed larger than the outer diameter of the puncture device 11 in order to allow the puncture device 11 to pass therethrough. The elastic body 15 enables the tip of the puncture device 11 to protrude from the front end surface 20 by compressive deformation in the axial direction.

  The elastic body 15 is produced so that the hardness is in the range of 20 to 30 in terms of hardness E (JIS K 6253E). By setting the hardness of the elastic body 15 in the range of 20 to 30 as the hardness E, the puncture hole is prevented from being blocked due to excessive deformation at the time of compression generated in a soft elastic body having a hardness E of 20 or less. . Moreover, insufficient protrusion of the puncture device 11 due to defective deformation at the time of pressing generated by a hard elastic body having a hardness E of 30 or more is prevented. In addition to this, bleed that tends to occur in a soft elastic body having a hardness E of 20 or less is suppressed to a very small amount.

  The surface of the elastic body 15 is covered with a coating material (not shown) that prevents the bleed-out substance from adhering to the subject. As described above, the surface of the elastic body 15 is covered with the coating material, so that a slight oozing substance that oozes out from the elastic body 15 does not enter the collected sample or come into contact with the subject. As a result, it is possible to suppress a decrease in the measurement success rate due to mixing of the exuding substance into the collected sample, and it is possible to prevent the influence on the subject.

  The elastic body 15 contains at least one of natural rubber, synthetic rubber, and sponge in the previous hardness. By using at least one of natural rubber, synthetic rubber, and sponge as the main material of the elastic body 15, it becomes easy to obtain raw materials, and the elastic body 15 having a desired hardness can be produced inexpensively with good moldability. .

  The synthetic rubber described above preferably contains at least one of silicone rubber, urethane rubber, acrylic rubber, styrene butadiene rubber, ethylene propylene rubber, and fluorine rubber. In the elastic body 15, the main material of the elastic body 15 is a synthetic rubber, and the synthetic rubber contains at least one of silicone rubber, urethane rubber, acrylic rubber, styrene butadiene rubber, ethylene propylene rubber, and fluorine rubber. The desired optimum hardness described above, that is, a range of 20 to 30 can be easily obtained with the hardness E (JIS K 6253E).

  More specifically, the elastic body 15 is made of rubber or sponge made of a polymer or a copolymer such as silicone, urethane, acrylic, ethylene, styrene, polyolefin such as polyethylene and polypropylene, polyethylene terephthalate and polybutylene. Polyester such as terephthalate, fluorine resin such as polytetrafluoroethylene, PFA which is a copolymer of perfluoroalkoxyethylene and polyfluoroethylene, and the like can be used.

FIG. 2 is a cross-sectional view showing a modification of the elastic body. FIG. 2A is a configuration explanatory view showing a cross section parallel to the axis of the puncture device 100A to which the elastic body 15A is attached, and FIG.
In addition, the same reference numeral is attached to the same member / part as that of the puncture device 100 shown in FIG.
An annular groove 21 is formed on the front end surface 20 of the elastic body 15 </ b> A, and the annular groove 21 is formed concentrically with the insertion portion 19. That is, the insertion part 19 is opened at the tip of the hemispherical bulging part 23 surrounded by the annular groove 21.

  The elastic body 15A is deformed so that the peripheral wall portion 25 of the front end face 20 is crushed by the compressive force in the axial direction. Further, when the same compressive force is applied, the bulging portion 23 is also deformed so as to be crushed to the vicinity of the bottom surface of the annular groove 21. In other words, the puncture device 11 is relatively projected from the front end face 20 of the elastic body 15A by the action of the compressive force. This compressive force is applied by the puncture device shown in FIG. 6 or manually.

A pair of ventilation grooves 29 and 29 are formed on the annular front end surface 27 outside the annular groove 21, and the ventilation grooves 29 and 29 are formed in the diametrical direction across the annular groove 21 and the outer peripheral surface of the elastic body. . By providing the ventilation grooves 29, 29, the annular concave groove 21 can be opened to the outside in a state where the front end face 20 of the elastic body 15A is blocked by the subject. As a result, the sealed annular concave groove 21 is pressed and deformed to increase the internal pressure, and this internal pressure becomes a resistance at the time of puncturing, and the sample is prevented from flowing out of the puncture hole.
The elastic bodies 15 and 15A may be attached to the distal ends of the main bodies 13 and 13A with a double-sided adhesive tape or an adhesive in addition to the engagement structure described above.

Next, the puncture device 200 will be described with reference to FIG.
The puncture device 200 includes a main body 201 formed in a bottomed cylindrical shape, a loading chamber 203, a pressing block 205, first and second coil springs 207 and 209, and an operating rod 211 as main components. Become. The main body 201 accommodates a pressing block 205 therein so as to be movable in the left-right direction in FIG.

  In the main body 201, a loading chamber 203 that allows the puncture device 100 to be mounted (loaded) is formed. A puncture opening 213 is formed in the loading chamber 203, and the puncture instrument 11 protrudes from the puncture opening 213 of the puncture instrument 100 loaded in the loading chamber 203.

  A driving chamber 215 is provided in connection with the loading chamber 203. The driving chamber 215 is formed to be larger than the loading chamber 203, and a step portion 217 is formed between the driving chamber 215 and the loading chamber 203. The driving chamber 215 is divided into two in the axial direction of the main body 201 by the partition wall 219, and the pressing block 205 is movably disposed in the space on the loading chamber 203 side.

  A fitting portion 221 that allows the main body 13 of the puncture device 100 to be mounted is formed at the distal end portion of the pressing block 205. A flange 223 is formed at the center of the pressing block 205, and the flange 223 abuts on a step portion 217 formed between the pressing block 205 and the movement of the pressing block 205 toward the loading chamber 203. is doing. An elastically deformable locking arm 225 having a locking claw 227 protruding at the tip is provided at the base end of the pressing block 205. Note that the locking claw 227 protrudes to the outside from a hole 229 opened in the main body 201 to be described later, and functions as a puncture button for driving the puncture device 200.

  The locking claw 227 abuts against the inner wall surface of the main body 201 by elastic force, is inserted into the hole 229 opened in the main body 201, and protrudes from the outer surface of the main body.

  A shaft 231 is fixedly connected to the proximal end of the pressing block 205. The shaft 231 passes through the partition wall 219 and extends to the other space of the drive chamber 215. A first coil spring 207 as an urging means is extrapolated on the shaft 231, the proximal end of the first coil spring 207 contacts the partition wall 219, and the distal end of the first coil spring 207 contacts the proximal end of the pressing block 205. ing. In the state shown in FIG. 7A, the first coil spring 207 is extended to bring the flange 223 into contact with the step portion 217. Accordingly, the movement of the pressing block 205 toward the loading chamber 203 is restricted in a state where the pressing block 205 is pressed.

  On the other hand, when the pressing block 205 is moved to the right in the state shown in FIG. 7A, the locking claw 227 is inserted into the hole 229, whereby the first coil spring 207 is compressed, and FIG. The position of the first coil spring 207 shown in FIG.

  A boss-like locking portion 233 is formed at the tip of the shaft 231 that extends through the partition wall 219 to the other space of the drive chamber 215. The locking portion 233 is provided so as to be able to engage with an operating rod 211 that passes through the bottom wall 201a of the main body 201 and protrudes to the outside. A knob 235 is provided at the end of the operating rod 211, and the knob 235 is disposed in a space 237 that allows the locking part 233 to move, and is relatively movable. When the knob portion 235 comes into contact with the locking portion 233 and moves to the right, the pressing block 205 moves and enters the inactive force accumulation state. A second coil spring 209 is extrapolated to the operating rod 211, the proximal end of the second coil spring 209 is in contact with the bottom wall 201 a of the main body 201, and the distal end of the second coil spring 209 is in contact with the proximal end of the knob portion 235. . Accordingly, in FIG. 7A, when the knob 235 is operated from the outside of the main body 201 to move to the right and the operating rod 211 is released in a state where the pressing block 205 is in a state of accumulation of inferior force, FIG. As shown in b), the operating rod 211 moves to the left by the restoring force of the second coil spring 209 to release the engagement with the locking portion 233. In this state, when the engagement with the hole 229 is released by operating the locking claw 227 serving as a puncture button, the pressing block 205 is moved by the restoring force of the first coil spring 207 from the inactive force accumulation state to the loading chamber 203. A pressing force is applied to the loaded puncture device 100 to compress and deform the elastic body 15. Thereby, the puncture device 11 is projected to puncture the subject.

Next, the operation of the puncture device 100 will be described.
FIG. 3 is an operation explanatory diagram showing the procedure of sampling.
In a non-use state, the puncture device 100 is a state in which the puncture device 11 is covered with the elastic body 15 by inserting the puncture device 11 into the insertion part 19 of the elastic body 15 attached to the main body 13. It becomes. In order to collect a sample using the puncture tool 100, first, the front end face 20 of the elastic body 15 is applied to the subject M, for example, a fingertip, as shown in FIG. The puncture device 100 may be loaded into the needle device 200 described above and may be mechanically pressed by the operation of the puncture button (locking claw) to project the tip, or the body 13 may be grasped with fingers. Then, the elastic body 15 may be pressed against the subject M.

  When the puncture device 100 is pressed against the subject M with a predetermined pressing force F1, the elastic body 15 is compressed and deformed in the axial direction as shown in FIG. 3B, and only the tip of the puncture device 11 is an elastic body. It protrudes from 15 front end surfaces 20. At this time, prior to puncturing, the front end face 20 of the elastic body 15 is always pressed against the body surface, and then the puncture device 11 is projected. That is, the sense does not concentrate only on the puncture.

  As a result, the protruding tip of the puncture device 11 is punctured into the subject M. As shown in FIG. 3C, the elastic body 15 deformed by the pressing force returns to its original shape by the restoring force F2. Accordingly, the puncture device 100 is slightly retracted, and the puncture device 11 is pulled out from the subject M. When the puncture instrument 11 is removed from the subject M, the sample B flows out from the puncture hole.

  Therefore, according to the puncture device 100 described above, the elastic body 15 that allows the distal end of the puncture device 11 to protrude from the front end surface 20 by compression deformation is attached to one end surface of the main body 13, so The instrument 11 is covered with the elastic body 15 and does not puncture accidentally. At the time of puncturing, first, the front end surface 20 of the elastic body 15 is pressed against the body surface, so that the sensation does not concentrate only on the puncturing portion, and pain at the time of puncturing can be eased. Further, since the puncture instrument 11 can be pulled out by the restoring force after the compression deformation of the elastic body 15, the return spring is not required and the puncture apparatus can be miniaturized. As a result, it is possible to remove safety, a reduction in burden during puncturing, and obstacles to downsizing of the puncture device.

  In addition, since the hardness of the elastic body 15 is configured in the range of 20 to 30 with a hardness E (JIS K 6253E), puncture due to excessive deformation at the time of compression generated with a soft elastic body with a hardness E of 20 or less The obstruction of the hole can be prevented, and the lack of protrusion of the puncture device 11 due to defective deformation at the time of pressing generated by a hard elastic body having a hardness E of 30 or more can be prevented, and satisfactory puncture and sampling can be realized. Furthermore, bleed that tends to occur with a soft elastic body having a hardness E of 20 or less can be suppressed to a very small amount. As a result, it is possible to improve puncture and sample collection, to eliminate the influence of a bleeding substance due to bleeding, and to improve the measurement success rate.

Next, a modified example of the puncture device 100 described above will be described.
FIG. 4 is a cross-sectional view of a puncture device 100B provided with a protective film as a modification. In addition, in each following modification, the same code | symbol is attached | subjected to the member / part same as the member / part shown in FIGS. 1-3, and the overlapping description is abbreviate | omitted.
As shown in FIG. 4A, the puncture device 100 </ b> B according to this modification has an annular front end that covers the front end surface 20 of the elastic body 15 and seals the insertion portion 19. Attached to the surface 27.
According to the puncture device 100B, as shown in FIG. 4 (b), when the elastic body 15 is compressed and deformed and the puncture device 11 is relatively projected, the protective film 41 is penetrated to penetrate the puncture device 11. The tip is projected. Therefore, the puncture device 11 is accommodated in the insertion part 19 sealed with the protective film 41 until just before use, and adhesion of bacteria is prevented. Thereby, even when the puncture device 100B is not used promptly after opening a package or the like, a high antibacterial effect can be maintained.

FIG. 5 is a cross-sectional view of a modification in which the protective film is recessed.
In the puncture device 100C according to this modification, as shown in FIG. 5A, the protective film 43 is recessed closer to the rear end portion than the annular front end face 27. That is, a step 45 is formed on the annular front end surface 27, and the protective film 43 is recessed by the step 45.
According to the puncture device 100C, as shown in FIG. 5B, when the elastic body 15C is compressed and deformed and the puncture device 11 is relatively projected, the puncture instrument 100C is provided on the step 45 of the elastic body 15C. The tip of the puncture device 11 is projected through the protective film 43. At this time, since the protective film 43 is recessed from the annular front end face 27 that contacts the subject, the puncture instrument penetrating portion of the protective film 43 does not contact the subject. Thereby, even if the surface of the protective film 43 is contaminated, it is possible to prevent the contaminant from adhering to the puncture hole of the subject.

FIG. 6 is a sectional view of a modification in which a protective film is integrally formed with the elastic body 15 of the puncture device 100 shown in FIG.
In the puncture device 100D according to this modification, as shown in FIG. 6A, a protective film that covers the front end face 20 of the elastic body 15D and seals the insertion portion 19 is attached to the elastic body 15 shown in FIG. Unlike the case where it is worn, it is equipped on the front end face 20 of the elastic body 15D by integral molding.
According to the puncture device 100D, as shown in FIG. 6B, when the elastic body 15D is compressed and deformed and the puncture device 11 is relatively projected, the elastic body 15D is pierced and the puncture device 11 The tip is projected. Therefore, the puncture device 11 is accommodated in the insertion part 19 sealed by the elastic body 15D until just before use, and adhesion of bacteria is prevented. Moreover, since the protective film is integrally formed with the elastic body 15D, it can be easily covered with the elastic body 15D only by inserting the puncture device 11 into the insertion portion 19 of the elastic body 15D.

It is composition explanatory drawing which represented the cross section parallel to the axis line of the puncture device which concerns on this invention to (a), and represented the lower surface to (b). It is sectional drawing of the modification provided with the mounting groove. It is operation | movement explanatory drawing showing the procedure of sample collection. It is sectional drawing of the modification provided with the protective film. It is sectional drawing of the modification by which the protective film was recessedly provided. It is sectional drawing of the modification by which the protective film was integrally molded. It is sectional drawing explaining the structure of a puncture device, (a) is a figure before mounting | wearing of a puncture device, (b) is a figure after mounting | wearing of a puncture device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Puncture device 13 Main body 13a One end surface 15 Elastic body 15a Rear end portion 19 Insertion portion 20 Front end surface 21 Annular groove 27 Annular front end surface 29 Ventilation groove 41, 43 Protective film 100, 100A, 100B, 100C, 100D Puncture tool 200 Puncture device

Claims (6)

A main body having a puncture device at the tip;
An elastic body having an insertion portion attached to the main body and capable of accommodating the needle-piercing device;
A puncture device characterized in that the elastic body is compressed and deformed in the axial direction of the puncture device so that the tip of the puncture device can protrude.   An annular concave groove concentric with the insertion portion is formed on the front end surface of the elastic body, and a ventilation groove extending between the annular concave groove and the outer peripheral surface of the elastic body is formed on the annular front end surface outside the annular concave groove. The puncture device according to claim 1.   The puncture device according to claim 1, wherein a protective film for sealing the insertion portion is provided on an annular front end surface outside the annular concave groove.   The puncture device according to claim 3, wherein the protective film is recessed closer to the main body than the annular front end surface.   The puncture device according to claim 1, wherein the elastic body is equipped with a protective film that seals the insertion portion by integral molding.   The puncture device according to any one of claims 1 to 5 can be loaded, and the loaded puncture device is pressed against a subject by a built-in urging means, thereby compressing and deforming an elastic body, and A puncture device, characterized in that a puncture device of a puncture device is projected from the elastic body.

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