JP2005185592A - Puncture tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a puncture tool where anybody can simply attach and detach a cap and replaces a needle cartridge. <P>SOLUTION: The puncture tool 10 for puncturing a living body with a needle 11 to exude a body liquid consists of: a puncture tool main body 2 for holding the needle cartridge 1 at a tip side attachably and detachably; and the cap 3 which is fitted to the puncture tool main body 2 attachably and detachably to cover the needle cartridge 1 and which is provided with a through hole 34 at its tip for allowing the needle 11 in the needle cartridge 1 to project. A hook 33 is formed at this cap 3, and an engaging part 23 in the state of protrusion to be engaged with a pawl part 36 of the hook 33 detachably is formed at the puncture tool main body 2. According to need, a hanging part 38 for hanging the needle cartridge 1 for pulling out is formed at the hook 33. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a puncture device that punctures a living body with a needle and exudes a necessary amount of body fluid to the surface of the living body when examining body fluid such as blood and interstitial fluid of the living body.

  In recent years, with the increase in the number of diabetic patients, it is recommended that patients themselves measure and monitor blood glucose level fluctuations in daily life. The patient himself punctures a fingertip or the like using a puncture device equipped with a needle and exudes a small amount of blood to the fingertip or the like, and then this blood is taken into a simple measuring device to measure a blood sugar level or the like.

  Conventionally, this puncture device is configured such that the puncture needle can be replaced by removing the cap at the tip (see, for example, Patent Document 1). This is because the needle cartridge is replaced every time the blood sugar level or the like is measured, so that the hygiene of the puncture tool is maintained and infection is prevented.

However, the conventional puncture device has a problem in terms of operability in the replacement operation of the needle cartridge because the cap at the tip is attached to and detached from the puncture device main body in a screw manner. In other words, in the case of a conventional puncture device, when removing the cap, the cap must be held while rotating the cap with the fingertip. Dexterity was required. Diabetes patients often have swelling, numbness, etc. at their fingertips due to complications, and there are also many patients who have decreased visual acuity. Especially for such patients, changing the needle cartridge of a conventional puncture device has never been an easy task.
JP 59-160441 (see the lower right column on page 2)

  The present invention was made in view of the above-described drawbacks of conventional puncture devices, and provides a puncture device that allows anyone to easily attach and detach caps and replace needle cartridges. There is to do.

  Another technical problem of the present invention is to provide a puncture device that can remove a used needle cartridge from a puncture device body simultaneously with a cap removal operation, if necessary.

The present invention is a puncture device for piercing a living body with a needle to exude body fluid,
A needle cartridge having the needle at the tip, a puncture device main body that detachably holds the needle cartridge on the tip side, a detachable attachment to the tip side of the puncture tool body, covering the needle cartridge, A cap provided with a through-hole through which the needle of the needle cartridge can protrude,
While the cap is provided with a hook, the puncture device main body is provided with an engaging portion on which a hook portion of the hook is detachably engaged.

  In the present invention, the hook nail portion is configured to be movable, and the hook nail portion is released from the engagement portion of the puncture device body by pushing the hook inward of the cap. It is characterized by being.

  Furthermore, the present invention is characterized in that the hook is integrally formed with the cap, and the hook is moved by elastic deformation of the hook.

  Furthermore, the present invention is characterized in that a hooking portion capable of hooking a protrusion formed on the needle cartridge is formed on the hook.

  Furthermore, the present invention is characterized in that a grip portion capable of gripping the needle cartridge is formed on the hook.

  According to the puncture device of the present invention, the cap can be easily and reliably attached and detached simply by engaging and disengaging the hook claw portion provided on the cap with the engagement portion provided on the puncture device body. Unlike conventional products that are attached and detached in a screw-type manner, anyone can easily replace the needle cartridge by attaching and detaching the cap.

  Further, according to the puncture device in which the hook claw portion is configured to be movable and the hook is pushed into the cap so that the engagement between the claw portion and the engagement portion is released, the basic and simple cases of holding the cap Thus, the cap can be attached and detached by an action that does not change, and the cap can be easily attached and detached without performing a special action such as changing the cap.

  Further, according to the puncture device in which the hook is integrally formed with the cap and the claw portion moves when the hook is elastically deformed, the configuration of the cap can be simplified and the manufacturing cost of the puncture device can be reduced. Can be achieved.

  In addition, according to the puncture device in which the hook is formed with a hook portion that can hook the needle cartridge or a grip portion that can hold the needle cartridge, the needle cartridge can be removed simultaneously with the cap removal operation. The number of operations required for exchanging the needle cartridge can be reduced. Moreover, since it is possible to remove and discard the used needle cartridge without touching it at all, it is possible to avoid the risk of accidentally touching the needle when removing the needle cartridge as in the past. it can.

  Hereinafter, embodiments of a puncture device according to the present invention will be described with reference to FIGS.

  As shown in FIG. 1, a puncture device 10 according to the present embodiment includes a needle cartridge 1 having a needle 11 at the tip, a puncture device body 2 that detachably holds the needle cartridge 1 at the tip, and the puncture device. The cap 3 is detachably attached to the distal end side of the main body 2. When blood is collected, the needle cartridge 1 is attached to the puncture device body 2 of the puncture device 10 and then used with the cap 3 attached so as to cover the needle cartridge 1 (see FIG. 2).

  As shown in FIG. 1, the needle cartridge 1 includes a metal needle 11 having a sharp tip and a fixing member 12 made of a cylindrical synthetic resin material with the needle 11 fixed to the tip. A hook-shaped protrusion 13 is provided in the middle of the fixing member 12 in the longitudinal direction. Further, as shown in FIG. 3, a cylindrical protective cover 14 can be fitted on the distal end side of the fixing member 12, and the needle 11 can be protected with the protective cover 14 in contact with the protruding portion 13. It is configured as follows. The needle cartridge 1 can be a conventional commercial product.

  As shown in FIG. 1, the puncture device main body 2 is configured such that a moving member 24 is disposed in a cylindrical casing 21 so as to be capable of reciprocating in the axial direction. The casing 21 has an opening 22 at the tip, and a pair of protruding engaging portions 23 that protrude inward are provided inside the rim of the opening 22 in an opposing state. An attachment recess 25 is formed at the tip of the moving member 24, and the needle cartridge 1 is detachably held by inserting the rear end of the needle cartridge 1 into the attachment recess 25.

  Further, a knob 26 is provided at the rear end of the puncture tool body 2, and the movable member 24 is compressed while a coil spring (not shown) built in the casing 21 is compressed by pulling the knob 26 rearward (see FIG. 6). Can be retreated. The retracted moving member 24 is locked at the retracted position by a locking mechanism (not shown) interlocked with the puncture button 27. Then, by pressing the puncture button 27 (see FIG. 7), the locked state of the moving member 24 is released, and the moving member 24 moves forward in the forward direction toward the distal end of the casing 21 by the elastic repulsive force of the compressed coil spring. . As the moving member 24 moves forward, the needle 11 of the needle cartridge 1 held at the tip of the moving member 24 is punctured on the surface of the living body. The knob 26, the coil spring, the puncture button 27, the locking mechanism, and the like of the puncture device main body 2 have the same configuration as that of a conventionally known puncture device, and a description of the specific configuration is omitted.

  As shown in FIG. 1, the cap 3 includes a tapered cylindrical peripheral wall portion 31, a distal end wall portion 32 disposed at a small-diameter distal end of the peripheral wall portion 31, and a pair of the same disposed on the peripheral wall portion 31. It is comprised from the hook 33, and the rear end of the large diameter of the surrounding wall part 31 is open | released. A through hole 34 through which the needle 11 of the needle cartridge 1 can protrude is formed at the center of the tip wall portion 32 of the cap 3, and the peripheral wall portion 31 has a rear end portion from the longitudinal center thereof. A pair of notches 35 are formed so as to face each other.

  The hook 33 of the cap 3 is formed so as to be taken out from the back of the inner surface of the peripheral wall portion 31 to the rear end side, and the claw portion 36 formed at the take-out end portion of each hook 33 is a rear end portion of the peripheral wall portion 31. Than protruding. Each nail | claw part 36 is formed outward toward the outer side of the cap 3, respectively, and a pair of nail | claw part 36 has mutually turned to the opposite direction. A detachable button 37 that is exposed to the outside of the peripheral wall portion 31 is formed in the middle of each hook 33 at the notch 35 portion. Furthermore, each hook 33 is formed with a stepped hooking portion 38 that can hook the protrusion 13 of the needle cartridge 1 toward the inside of the cap 3.

  The peripheral wall portion 31, the tip wall portion 32, and the hook 33 of the cap 3 are integrally formed of a synthetic resin material. Thus, when the detachable button 37 is pressed inward of the cap 3, the hook 33 is elastically deformed mainly by the thin portion 30, and the claw portion 36 moves inward of the cap 3. When the pressure is released, the claw portion 36 returns to the original position by the elastic repulsive force of the hook 33.

  Hereinafter, the use procedure of the puncture device 10 of this embodiment is demonstrated, referring FIGS. 3-10.

  When blood is collected using the puncture device 10, first, the needle cartridge 1 is attached to the moving member 24 of the puncture device body 2 as shown in FIG. That is, the needle cartridge 1 is attached to the distal end of the moving member 24 by inserting the needle cartridge 1 into the mounting recess 25 of the moving member 24 with the protective cover 14 attached.

  Then, as shown in FIGS. 4 and 5, after removing the protective cover 14 from the needle cartridge 1, the cap 3 is attached to the distal end side of the puncture device body 2. That is, the cap 3 is attached by engaging the claw portion 36 of the hook 33 with the protruding engagement portion 23 of the puncture device body 2. At this time, the attachment / detachment button 37 of the cap 3 may be pressed to move the claw portion 36 inward and then engaged with the engagement portion 23. However, the attachment / detachment button 37 is not positively pressed and the claw portion It is also possible to move the claw portion 36 inward by engaging the engaging portion 23 by pushing the cap 3 while the inclined surface of the tip of the 36 is brought into contact with the engaging portion 23. When the cap 3 is attached to the puncture device main body 2 in this way, the needle cartridge 1 is completely covered by the cap 3, and the needle 11 is also located inside the cap 3.

  Next, as shown in FIG. 6, the knob 26 of the puncture device body 2 is pulled backward to retract the moving member 24 while compressing the coil spring, and the moving member 24 is locked at the retracted position by a locking mechanism (not shown). . After the moving member 24 is locked at the retracted position, the knob 26 can be returned to the original position.

  Then, as shown in FIG. 7, when the tip of the cap 3 is in contact with a fingertip or the like to be blood-collected, the puncturing button 27 is pressed to release the locked state of the moving member 24 to move the moving member 24. Is moved forward vigorously using the elastic repulsive force of the coil spring. Then, by causing the needle 11 of the needle cartridge 1 to protrude from the through hole 34 of the tip wall portion 32, the needle 11 is punctured into a fingertip or the like, and blood is exuded there. 7 shows a state in which the needle 11 is positioned in the cap 3, but the needle 11 that has been vigorously moved forward by the compression coil spring momentarily protrudes from the through hole 34 toward the tip side, and the like. Puncture. And it retracts into the cap 3 immediately after puncturing a fingertip or the like. The retraction operation of the needle 11 uses an elastic repulsion force of a second coil spring disposed on a stopper (not shown) for stopping the moving member 24 that moves forward at a predetermined advance position, as in a conventionally known puncture device. To do.

  In the puncture device 10 of the present embodiment, when the needle cartridge 1 is replaced, as shown in FIG. 8, the claw portion 36 of the hook 33 and the puncture device main body 2 are pressed by pressing the attach / detach button 37 of the cap 3. The cap 3 is separated from the puncture device body 2 by releasing the engaged state with the engaging portion 23.

  Then, as shown in FIG. 9, the cap 3 is released while pressing the detachable button 37, the protrusion 13 of the needle cartridge 1 is hooked by the hooking portion 38 of the hook 33, and the cap 3 is further released, The needle cartridge 1 is pulled out from the puncture device body 2.

  Thereafter, as shown in FIG. 10, by loosening the pressing of the cap 3 against the attaching / detaching button 37, the hooking portion 38 is moved outward using the elastic restoring force of the hook 33, and the pulled out needle cartridge 1 is removed from the cap 3. Drop it. In this way, the used needle cartridge 1 is discarded in a trash box or the like. Then, the unused needle cartridge 1 is remounted on the puncture tool body 2 in accordance with the above-described needle cartridge mounting procedure (see FIG. 3).

  As described above, according to the puncture device 10 of the present embodiment, the claw portion 36 of the hook 33 provided on the cap 3 can be simply and simply engaged with and disengaged from the engagement portion 23 provided on the puncture device body 2. Since the cap 3 can be securely attached and detached, everyone can easily attach and detach the cap and replace the needle cartridge, unlike the conventional product in which the cap is attached and detached in a screw manner.

  Moreover, in the puncture device 10 of the present embodiment, the claw portion 36 of the hook 33 is formed outward and the engagement portion 23 of the puncture device body 2 is formed inward, and presses the hook 33 inward. By simply moving the claw portion 36 inward, the engagement between the claw portion 36 and the engagement portion 23 can be easily released. Accordingly, the cap 3 can be attached and detached by an action that is basically the same as when the cap 3 is simply held. For example, the cap 3 can be easily attached and detached without performing a special action such as changing the cap 3. be able to.

  Further, since the puncture device 10 of the present embodiment is formed with a hook portion 38 that can hook the protrusion 13 of the needle cartridge 1 on the hook 33, the cap 3 is pressed against the cap 3 while pressing the hook 33 inward. The needle cartridge 1 can be removed at the same time that the cap 3 is removed simply by performing an operation of separating the needle cartridge 2, and the number of operations required to replace the needle cartridge can be reduced. Moreover, since it is possible to remove and discard the used needle cartridge 1 without touching it at all, it is possible to avoid the risk of accidentally touching the needle when removing the needle cartridge as in the prior art. You can also.

  As mentioned above, although typical embodiment was described about the puncture device which concerns on this invention, the puncture device which concerns on this invention can also be implemented with another form.

  For example, in the above-described embodiment, the stepped hooking portion 38 is formed on the hook 33 of the cap 3, and the protrusion 13 of the needle cartridge 1 is hooked by the hooking portion 38 to pull out the needle cartridge 1 together with the cap 3. However, as shown in FIG. 11, a grip portion 39 may be formed inside the hook 33, and the needle cartridge 1 may be held and pulled out by gripping the needle cartridge 1 with the grip portion 39. FIG. 11 illustrates a state in which the attaching / detaching button 37 is pressed to the inside of the cap 3 and is held by the holding portion 39 with the protruding portion 13 of the needle cartridge 1 interposed therebetween. The fixing member 12 of the needle cartridge 1 may be gripped by the portion.

  Moreover, in the said embodiment, while the nail | claw part 36 of the hook 33 is formed outward, the engaging part 23 of the puncture tool main body 2 is formed inward, and both are engaged, On the contrary, the hook claw portion may be formed inward, while the puncture device main body may be formed outwardly to engage both. In this case, if a shaft support portion is provided between the hook inward claw portion and the detachable button for moving the hook, the inward claw portion is pressed through the shaft support portion by pressing the detachment button inside the cap. Can be moved outward, and the engagement with the outward engagement portion of the puncture device body can be easily released.

  Furthermore, in the above embodiment, two hooks 33 are formed in the cap 3 so as to face each other, and the two engaging portions 23 are formed in the puncture device body 2, but the present invention is in no way limited to this. Instead of one, one or more hooks and engaging portions may be formed. When the cap is provided with one hook, the needle cartridge is held between the hook or grip formed on the hook and the inner surface of the peripheral wall of the cap.

  Furthermore, in the above embodiment, the engaging part 23 of the puncture device body 2 is formed in a protruding shape, but a recessed engaging part is formed inside the lip of the casing 21, and a hook nail is formed on this. A part may be engaged, and a through hole may be formed in the mouth edge of the casing 21 as an engaging part, and a hook claw part may be engaged with the through hole.

  As described above, the present invention can be implemented in a mode in which various improvements, corrections, and modifications are made based on the knowledge of those skilled in the art without departing from the gist thereof, and the range in which the same action or effect is produced. In the present invention, any of the invention-specific matters may be replaced with another technology, or the integrally-configured invention-specific matters may be constituted by a plurality of members, or may be constituted by a plurality of members. You may implement with the form which comprised the invention specific matter currently comprised integrally.

It is a partial cross section side view which shows the decomposition | disassembly state of the puncture device concerning this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a general view which shows the use condition of the puncture device based on this invention, The figure (a) is a side view, The figure (b) is a top view. It is a partial cross section side view explaining the use procedure of the puncture device which concerns on this invention. It is a partial cross section side view explaining the use procedure of the puncture device based on this invention. It is a partial cross section side view explaining the use procedure of the puncture device which concerns on this invention. It is a partial cross section side view explaining the use procedure of the puncture device which concerns on this invention. It is a partial cross section side view explaining the use procedure of the puncture device which concerns on this invention. It is a partial cross section side view explaining the use procedure of the puncture device which concerns on this invention. It is a partial cross section side view explaining the use procedure of the puncture device which concerns on this invention. It is a partial cross section side view explaining the use procedure of the puncture device which concerns on this invention. It is a partial cross section side view explaining the modification of the puncture device which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Puncture tool 1 Needle cartridge 11 Needle 2 Puncture tool main body 23 Engagement part 3 Cap 33 Hook 34 Through-hole 36 (Hook) nail part 38 (Hook) hook part 39 (Hook) grip part

Claims (5)

A puncture device that punctures a living body to exude body fluid,
A needle cartridge provided with the needle at the tip;
A puncture device main body detachably holding the needle cartridge on the distal end side;
A cap that is detachably attached to the distal end side of the puncture device body, covers the needle cartridge, and has a through-hole through which the needle of the needle cartridge can project at the distal end;
Including
A puncture device, wherein a hook having a claw portion is provided on the cap, and an engagement portion is provided on the puncture device body so that the claw portion of the hook is detachably engaged.   2. The hook nail portion is configured to be movable, and the engagement between the hook nail portion and the engagement portion of the puncture device main body is released by pushing the hook inward of the cap. Puncture tool.   The puncture device according to claim 1 or 2, wherein the hook is integrally formed with the cap, and the hook is moved by elastic deformation of the hook.   The puncture device according to any one of claims 1 to 3, wherein a hooking portion capable of hooking a protrusion formed on the needle cartridge is formed on the hook. The puncture device according to any one of claims 1 to 3, wherein a grip portion capable of gripping the needle cartridge is formed on the hook.

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