JP4691199B2 - Puncture needle cartridge - Google Patents

Description

  The present invention relates to a puncture needle cartridge for exchanging a puncture device used for blood collection or the like.

  Conventionally, various puncture devices for collecting blood have been proposed, and in this puncture device, only the puncture needle was discarded and replaced, but this is because the portion of the tip cap that directly touches the skin is reused. There was a hygiene problem. Further, there is a risk that the puncture needle may be mistakenly inserted into a hand or the like when the puncture needle is attached to the puncture device or when the puncture needle is discarded. In addition, some patients felt afraid of the puncture needle.

  In response to the above-described problems, a puncture needle cartridge has been proposed that has a holder surrounding the puncture needle and that can be attached to and detached from the puncture device body without touching the puncture needle (see, for example, Patent Document 1). . Hereinafter, a conventional puncture needle cartridge will be described with reference to FIG.

  As shown in FIG. 7, the puncture needle cartridge 701 includes a puncture needle holder 706, a lancet body 704 having a puncture needle 703, and a puncture needle protection cap 702 that protects the puncture needle 703. The puncture needle holder 706 houses the lancet body 704. The lancet body 704 is housed so as to be movable in the axial direction inside the puncture needle holder 706. Further, by providing the lancet body 704 with a large diameter portion 705, the lancet body 704 is prevented from moving toward the opening side of the puncture needle holder 706, that is, in the distal direction unless a predetermined force is applied.

  The puncture needle cartridge 701 configured as described above is attached to a puncture device body (not shown), and the lancet body 704 is fitted into the plunger of the puncture device body. At the time of puncturing, the plunger is moved by the urging means, whereby the lancet body 704 is ejected in the distal direction, and the puncture needle 703 protrudes from the opening of the puncture needle holder 706. Is punctured. When the puncture needle 703 is removed from the puncture site after puncturing, the lancet body 704 is moved in the direction opposite to the distal direction (rear end direction) by the urging means of the puncture device body, and the puncture needle 703 is again in the puncture needle holder 706. It is stored in.

  As described above, when the puncture needle cartridge 701 shown in FIG. 7 is used, since the puncture needle protrudes only at the time of puncture, it does not puncture accidentally and does not give fear to the patient. In addition, since the entire puncture needle cartridge can be replaced, the puncture needle can be safely replaced and the portion directly touching the skin in addition to the puncture needle can be discarded.

JP 2000-245717 A

  An object of this invention is to provide the puncture needle cartridge which reduces an assembly man-hour.

  The puncture needle cartridge of the present invention includes an elongated lancet body having a puncture needle, a lancet having a puncture needle protection cap that protects the puncture needle, and a cylindrical shape that houses the lancet body so as to be movable therein. A puncture needle holder, and the lancet body is inclined toward the side not having the puncture needle so that the height from the axis of the lancet body is reduced, and the puncture needle is provided. A convex portion made of an elastically deformable material having a step on its side is formed, the puncture needle is accommodated in the puncture needle holder, and the convex portion is external to the end of the cylindrical puncture needle holder. The convex portion has a side having the step toward the end portion, and the step has a size that comes into contact with the end portion.

  The puncture needle cartridge of the present invention includes an elongated lancet body having a puncture needle at one end and a portion held by the puncture device at the other end, a lancet having a puncture needle protection cap for protecting the puncture needle, and the lancet A cylindrical puncture needle holder that accommodates the main body so as to be movable therein, and the lancet is inserted into the puncture needle holder from the other end side of the lancet, and is formed on the lancet main body. The lancet is inserted by the convex portion by elastically deforming the convex portion and by taking out the portion having the convex portion from the end opposite to the inserted end to the outside of the puncture needle holder. The lancet is incorporated in the puncture holder so as not to come off from the side end.

  In the puncture needle cartridge of the present invention, the convex portion is inclined toward the other end side of the lancet body so that the height from the axis of the lancet body is reduced, and the lancet body The one end side has a step.

  The puncture needle cartridge of the present invention has an elongated lancet body having a puncture needle at one end and a portion held by the puncture device at the other end, and a puncture needle having an elongated puncture needle protecting portion that covers the puncture needle A lancet having a protective cap, and a cylindrical puncture needle holder for housing a part of the lancet body and the puncture needle protection part, wherein the puncture needle protection cap is one of the cylindrical puncture needle holders. A lid-like member covering the opening of the puncture needle, inserting the other end of the lancet through the one opening of the puncture needle holder, and taking a portion gripped by the puncture device out of the puncture needle holder In addition, the lancet is incorporated so as not to come out of the one opening.

  According to the puncture needle cartridge of the present invention, when the lancet body is assembled into the puncture needle holder, the other end of the lancet is fitted into the puncture needle holder, and the convex portion is incorporated while being elastically deformed. There is an effect that can be reduced.

It is a figure which shows an example of the puncture device which mounts | wears with the puncture needle cartridge which concerns on this Embodiment 1, and punctures. It is a block diagram which shows the puncture needle cartridge which concerns on this Embodiment 1. FIG. It is a block diagram which shows the lancet of the puncture needle cartridge which concerns on this Embodiment 1. FIG. It is sectional drawing which shows the puncture needle holder of the puncture needle cartridge which concerns on Embodiment 1 of this invention. In the puncture needle cartridge which concerns on Embodiment 1 of this invention, it is a figure which shows the assembly of a lancet and a puncture needle holder. It is sectional drawing which shows the internal structure before the puncture of the puncture device with which the puncture needle cartridge which concerns on Embodiment 1 of this invention was mounted | worn. It is sectional drawing which shows the internal structure of the puncture standby state of the puncture device which mounted | wore with the puncture needle cartridge which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the internal structure at the time of puncture of the puncture device equipped with the puncture needle cartridge which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the internal structure after the puncture of the puncture device with which the puncture needle cartridge which concerns on Embodiment 1 of this invention was mounted | worn. It is sectional drawing of the puncture device when discarding the puncture needle cartridge which concerns on Embodiment 1 of this invention. In the puncture needle cartridge which concerns on Embodiment 1 of this invention, it is sectional drawing which shows the internal structure of a puncture device when the puncture needle cartridge which used once and remove | excluded the puncture needle protective cap is mounted to the puncture device main body. It is sectional drawing of the conventional puncture needle cartridge.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
Hereinafter, the puncture needle cartridge according to Embodiment 1 of the present invention will be described with reference to FIGS.

  FIG. 1 is a diagram illustrating an example of a puncture device that performs puncture with the puncture needle cartridge according to the first embodiment. As shown in FIG. 1, the puncture needle cartridge 102 according to the first embodiment is attached to the puncture device main body 101. The direction in which the puncture needle protrudes (arrow direction in FIG. 1) is the front end direction, and the direction opposite to the front end direction (direction opposite to the arrow in FIG. 1) is the rear end direction.

Next, a detailed configuration of the puncture needle cartridge 102 according to the first embodiment will be described with reference to FIGS. 2, 3, and 4.
FIG. 2 is a configuration diagram showing the puncture needle cartridge according to the first embodiment. In FIG. 2, the puncture needle cartridge 102 includes a puncture needle holder 201, a puncture needle protection cap 202, and a lancet body 203. The puncture needle protection cap 202 covers the puncture needle of the lancet body 203 and is housed in the inner diameter portion 205 of the cylindrical puncture needle holder 201 as a lancet 204 composed of the puncture needle protection cap 202 and the lancet body 203. The puncture needle cartridge 102 according to the first embodiment is housed so that the lancet body 203 can move in the puncture needle holder 201 in the axial direction so that the puncture needle can protrude.

Next, the puncture needle holder 201 and the lancet 204 constituting the puncture needle cartridge 102 in FIG. 2 will be described in detail with reference to FIGS.
FIG. 3 is a configuration diagram of the lancet 204. In FIG. 3, the lancet 204 has a lancet body 203 having a puncture needle 301 and a puncture needle protection cap 202 that protects the puncture needle 301, and the puncture needle 301 is provided in the puncture needle protection cap 202. It is protected by a puncture needle protection part 307 having the same shape as the body part. Furthermore, the lancet body 203 has arm means 302, a lancet body first convex portion 303, and a lancet body main body second convex portion 304.

  The arm means 302 has an engaging portion 305 that is one end thereof connected to the lancet body 203 and a distal end portion 306 that is the other end is opened in a tapered manner toward the distal end side of the lancet body 203. Further, the arm means 302 is elastically deformed in the center direction or the outward direction of the lancet body 203.

  The 1st convex part 303 is comprised by the elongate shape, and is provided in two places right and left toward the axial direction at the trunk | drum of a lancet main body. Moreover, the 2nd convex part is provided in two places right and left toward the axial center direction at the trunk | drum rear end of the lancet main body.

FIG. 4 is a cross-sectional view showing the puncture needle holder 201.
As shown in FIG. 4, the puncture needle holder 201 has a skin contact portion 402 formed with an opening 401 at the tip, and the inside thereof is formed by a convex portion. The convex portion and the arm means 302 are connected to each other. It has a locked means 403 that cooperates. Further, the puncture needle holder 201 is engaged with the first convex portion 303 of the lancet body 203 and has a puncture needle holder groove 404 as a guide for moving the lancet body 203 in a straight line. The puncture needle holder 201 has a puncture needle holder rear end 405 that cooperates with the lancet body second convex portion 304 of the lancet body 203 in order to prevent the lancet body 203 from coming off in the distal direction.

  In the first embodiment, the first and second convex portions are provided in two places, but the number is not limited, and for example, only one place may be provided.

  In addition, although the shape of the first convex portion is long, the shape is not limited to this, and any shape may be used as long as the lancet body 203 is moved in a straight line by the guide of the puncture needle holder groove 404.

  In the first embodiment, the lancet body 203 has the first and second convex portions, and the puncture needle holder 201 has the groove that engages with each convex portion. Further, the lancet body 203 is configured to have a groove and the puncture needle holder 201 has a convex portion in the axial direction, and the groove and the convex portion are engaged to further move the lancet main body 203 in a straight line. You may do it.

  The puncture needle cartridge 102 shown in FIG. 2 is configured by incorporating a lancet 204 into the inner diameter portion 205 of the puncture needle holder 201. At this time, as shown in FIG. 5, the rear end of the lancet body 203 is fitted from the opening 401 of the puncture needle holder 201. The second convex portion 304 is made of an elastically deformable material such as a resin, and further, for example, the shape of the second convex portion 304 is inclined toward the rear end of the body portion of the lancet body. By configuring and making it easy to fit into the puncture needle holder 201, the lancet body 203 can easily push the lancet 204 to the position shown in FIG. 2 while elastically deforming the second convex portion 304. Thereby, the lancet body can be easily assembled into the puncture needle holder, and the number of assembling steps for the puncture needle cartridge can be reduced. In the first embodiment, as shown in FIG. 2, the position of the lancet body 203 where the assembly of the lancet 204 and the puncture needle holder 201 is completed is the initial position of the lancet body 203 (hereinafter referred to as the first position). And

  Thus, in the first position of the lancet body 203 in which the lancet 204 and the puncture needle holder 201 have been assembled as shown in FIG. When the rear end 302 and / or the first protrusion 303 abuts against the rear end 405 of the puncture needle holder, the movement of the lancet body 203 in the direction opposite to the puncture direction is locked. Even when the lancet moves in the puncturing direction, the arm means 302 and the locked means 403 of the lancet body cooperate to elastically deform the arm means 302 so as to spread outward of the lancet body 203, and to engage the arm means. When the stop portion 305 and the locked means 403 come into contact with each other, the movement of the lancet body 203 in the puncturing direction is locked. Thereby, the puncture needle cartridge 102 according to the first embodiment can be structured such that the puncture needle does not protrude when it is not attached to the puncture device and moves in the puncture direction from the first position. .

A puncturing operation using the puncture needle cartridge configured as described above will be described with reference to FIGS. 6 (a) to 6 (f).
FIG. 6A is a cross-sectional view showing the internal configuration of the puncture device equipped with the puncture needle cartridge 102 according to Embodiment 1 before puncturing. FIG. 6B is a cross-sectional view showing the internal configuration of the puncture device in a puncture standby state with the puncture needle protection cap 202 removed. FIG.6 (c) is sectional drawing which shows the internal structure of the puncture device of the position which the puncture needle protruded at the time of puncture. FIG.6 (d) is sectional drawing which shows the internal structure of the puncture device after puncture. FIG. 6E is a cross-sectional view showing a configuration when the puncture needle cartridge 102 is discarded from the puncture device.

  First, as shown in FIG. 6 (a), the puncture needle cartridge 102 is mounted by being inserted into the puncture device body 101, and as shown in FIG. 6 (b), the puncture needle is protected from the state shown in FIG. 6 (a). The cap 202 is removed, and the puncture preparation state is set in a state where the urging force is stored by a charge spring (not shown) of the puncture device body.

  As shown in FIGS. 6A and 6B, the positional relationship between the lancet body 203 of the puncture needle cartridge 102 and the puncture needle holder 201 is the same between before puncture and in the puncture standby state. Similar to the first position of the lancet body 203 shown in FIG. 2, the arm means 302 is located on the rear end side of the locked means 403. Thus, in the puncture needle cartridge 102 according to the first embodiment, the puncture needle cartridge 102 is the puncture device main body with the first position where the arm means 302 is located on the rear end side of the locked means 403 as the puncture preparation position. 101, the housing 602 of the puncture device body grips the rear end portion of the puncture needle holder 201, and the plunger 601 grips the rear end portion of the lancet body 203.

  Further, at this time, the arm means 302 is elastically deformed toward the center of the lancet main body by the housing 602 of the puncture device main body and stands by for puncturing. That is, in the puncture needle cartridge in FIGS. 6A and 6B, the arm means 302 and the housing 602 of the puncture device body are engaged, and the position of the arm means 302 of the lancet body is compared with FIG. Elastically deforms toward the center of the body.

The puncture needle protection cap 202 is provided with a puncture needle holder cover 603 to make it easier to hold the protection cap when the puncture needle cartridge 102 is attached to the puncture device body 101, and when the puncture needle protection cap 202 is twisted off. In order to make it fit in the hand and to make it easy to rotate, the part held at the time of rotation is a knurled shape 604.
In the first embodiment, the knurl needle shape 604 is used so that the puncture needle protection cap can be easily fitted to the hand. However, the shape is not limited to this, and may be an octagon shape or a finger shape.

  The puncture needle protection cap 202 protects the puncture needle and attaches the puncture needle cartridge while holding the puncture needle holder cover 603 so that the lancet body 203 does not move in the puncture needle holder. Thus, the arm means 302 and the housing 602 of the puncture device body can be engaged without the puncture needle holder 201 and the lancet body 203 moving relative to each other. That is, the lancet body 203 moves in the puncture needle holder because the puncture needle protection part 307 of the puncture needle protection cap 202 and the tip of the lancet body 203 are in contact with each other in the inner diameter portion 205 of the puncture needle holder 201. The lancet body 203 can be fixed so that it does not.

  Then, at the first position as shown in FIG. 6B, the user places a finger or the like on the skin contact portion 402 of the puncture needle holder 201 and presses a puncture button (not shown) of the puncture device body 101. A puncture operation is performed by such an operation.

At this time, as shown in FIG. 6C, the puncture needle cartridge 102 at the time of puncture is such that the plunger 601 moves the lancet body 203 from the first position by the urging force of the charge spring (not shown) of the puncture device. When the lancet body 203 and the plunger 601 move in the distal direction, the lancet body 203 moves to a position where the puncture needle protrudes (hereinafter referred to as a second position). At this time, as shown in FIGS. 6A and 6B, the lancet body 203 moves in the distal direction because the arm means 302 of the lancet body is elastically deformed toward the center of the lancet body. At this time, the arm means 302 of the lancet main body does not cooperate with the locked means 403 and can be punctured. Thereby, the puncture needle 301 protrudes from the opening 401 of the puncture needle holder 201 and pierces the puncture site. At the time of this puncturing, the lancet body first convex portion 303 and the puncture needle holder groove 404 are engaged, so that the lancet body 203 can move linearly in the axial direction.

  It should be noted that the inner diameter 605 of the puncture needle holder locking means 403 may be configured according to the inner diameter 606 of the puncture device housing to which the puncture needle cartridge is attached, and the lancet body 203 is moved from the first position to the first position. 2, the arm means 302 does not cooperate with the locked means 403, that is, the inner diameter 605 of the locked means 403 is the same as or wider than the inner diameter 606 of the housing 602 of the puncture device. Any configuration can be used.

  When the plunger 601 does not grip the lancet body 203, the lancet body 203 is moved from the puncture needle holder 201 by the second lancet body second projection 304 and the puncture needle holder rear end 405 coming into contact with each other. To prevent it from coming out.

  Then, as shown in FIG. 6D, the puncture needle cartridge 102 after puncture returns the lancet body 203 from the second position toward the rear end when the charge spring of the puncture device body returns to its original state. The puncture needle 301 moves and stops at a position where the puncture needle 301 does not protrude from the opening 401 of the puncture needle holder 201, but this position becomes a puncture end position (hereinafter referred to as a third position).

  In the puncture needle cartridge 102 according to the first embodiment, the initial position of the lancet body 203 is the first position and the first position is the puncture preparation position. However, the present invention is not limited to this. For example, when preparing for puncture, a position behind the initial position is punctured to cope with a puncture device that moves the plunger 601 and the lancet body 203 in a direction opposite to the puncture direction in order to temporarily store the urging force. It may be configured as a preparation position. At this time, the same operation may be performed thereafter with the puncture preparation position as the first position.

FIG. 6E shows the puncture needle cartridge 102 at the time of disposal after the puncture operation.
When removing the puncture needle cartridge 102 after the puncture is completed, the user first holds the puncture needle holder 201 from the state shown in FIG. 6D and performs an extraction operation of the puncture needle cartridge 102. When the puncture needle holder 201 and the lancet main body 203 move away from each other, the lancet main body 203 is arranged such that the arm means 302 of the lancet main body is closer to the rear end side than the locked means 403 from the third position. The locking portion 305 of the arm means 302 of the lancet body comes into contact with the rear end 405 of the puncture needle holder and / or the first convex portion 303 comes into contact with the puncture needle holder groove 404, When further pulling operation is performed, the engagement between the lancet body 203 and the plunger 601 of the puncture device body, and the arm means 303 With the engagement of the housing 602 of the puncturing instrument body is released, the elastic deformation toward the center of the lancet body of the arm means 302 is released. Thus, in the state after the removal as shown in FIG. 6E, the lancet body is moved from the third position to the first position and is further elastically deformed toward the center of the lancet body. Since the means 302 returns to the original position, even if the lancet body 203 is moved in the puncture direction in the puncture needle holder, the puncture needle does not protrude because the arm means 302 cooperates with the locked means 403. . Thereby, at the time of disposal, it is possible to dispose safely without requiring a puncture needle protection cap.

  Next, the case where the arm means 302 and the locked means 403 of the lancet body cooperate with each other will be described with reference to FIG. FIG. 6 (f) is a diagram showing the internal configuration when the arm means 302 and the locked means 403 of the lancet body cooperate, for example, puncture with the puncture needle protection cap 202 removed once used. It is an internal block diagram of a puncture device when it tries to attach the needle cartridge 102 to the puncture device main body 101 again. As shown in FIG. 6 (f), when the puncture needle cartridge 102 having been used once and having the puncture needle protection cap 202 removed is inserted into the puncture device body 101, the puncture needle holder 201 and the lancet body 203 are mutually connected. While moving so that it may approach, the arm means 302 and the to-be-latched means 403 cooperate, and the arm means 302 elastically deforms outside. As a result, the arm means 302 spreading outward and the insertion port or housing of the puncture device come into contact with each other, so that the puncture needle cartridge 102 cannot be completely attached to the puncture device main body 101 and cannot be punctured again. That is, the puncture needle cartridge that has been once punctured and removed from the puncture device cannot be reused and the puncture needle 301 does not protrude.

  It should be noted that even when the puncture needle has never been used, the puncture needle cartridge cannot be mounted on the puncture device body when the puncture needle protective cap is removed, as in FIG. 6 (f). In other words, when the puncture needle protection cap 202 is removed, the puncture needle cartridge can be attached to the puncture device body, and therefore a safer puncture needle cartridge can be provided.

  As described above, in the puncture needle cartridge according to Embodiment 1 of the present invention, the puncture needle 301 can be projected only during puncture, and the puncture needle 301 is opened from the opening 401 of the puncture needle holder other than during puncture. Can be prevented from protruding.

  As described above, the puncture needle cartridge 102 according to the first embodiment includes the lancet body 203 having the puncture needle 301 and the puncture needle holder 201, and the lancet body 203 has the arm means 302, The needle holder 201 has a locked means 403 that cooperates with the arm means 302, and the movement of the lancet body 203 in the puncture direction is locked when the arm means 302 and the locked means 403 cooperate. Since the puncture needle protrudes only at the time of puncture, the safety of the puncture needle cartridge can be improved, and the puncture needle cartridge with the puncture needle protective cap 202 removed once used. When attaching 102 to the puncture device main body 101, the arm means 302 of the lancet main body 203 and the locked means 403 of the holder 201. By There was to cooperate, it is possible to prevent the re-use once the puncture needle used.

  The puncture needle cartridge according to the present invention includes a puncture needle for exchanging a puncture device used for blood collection and the like, and a puncture needle that accommodates therein the puncture needle so as to be movable and can be exchanged simultaneously with the puncture needle It is useful as a disposable puncture needle cartridge having a holder.

DESCRIPTION OF SYMBOLS 101 Puncture instrument main body 102 Puncture needle cartridge 201 Puncture needle holder 202 Puncture needle protective cap 203 Lancet main body 204 Lancet 205 Puncture needle holder inner diameter portion 301 Puncture needle 302 Arm means 303 Lancet main body first convex portion 304 Lancet main body second convex portion 305 Locking section 306 Tip section 307 Puncture needle protection section 401 Opening section 402 Skin contact section 403 Locked means 404 Puncture needle holder groove 405 Puncture needle holder rear end section 601 Plunger 602 Housing 603 Puncture needle holder cover 604 Knurled shape 605 Locking means inner diameter 606 Housing inner diameter 701 Puncture needle cartridge 702 Puncture needle protection cap 703 Puncture needle 704 Lancet body 705 Large diameter portion 706 Puncture needle holder

Claims (3)

A puncture needle cartridge attached to the puncture device body,
A lancet body having an elongated lancet body having a puncture needle at one end and a portion gripped by the puncture device body at the other end, and a lancet protection cap for protecting the puncture needle;
A cylindrical puncture needle holder for accommodating the lancet body so as to be movable therein;
With
The lancet body is formed of an elastically deformable material having an inclination so that the height from the axial center of the lancet body is reduced toward the other end side, and the one end side having a step. Part is formed,
Portion to be gripped by the convex portion and the puncture device body is out to the outside from the end portion side of the rear of the puncture needle holder,
The convex portion, the provided side having a step is towards the end after the puncture needle holder, the step puncture needle cartridge having abutting size to the rear end. A puncture needle cartridge attached to the puncture device body,
A lancet body having an elongated lancet body having a puncture needle at one end and a portion held by the puncture device at the other end, and a puncture needle protection cap for protecting the puncture needle;
A cylindrical puncture needle holder for accommodating the lancet body so as to be movable therein;
With
The lancet is inserted into the puncture needle holder from the other end side of the lancet, the lancet body is formed of a material that can be elastically deformed, and a convex portion that is inclined from the one end side to the other end side is formed. By projecting the portion having the convex portion to the outside from the rear end side of the puncture needle holder while elastically deforming, the convex portion and the rear end portion of the puncture needle holder come into contact with each other, and the convex portion as the lancet can not be pulled out from the previous end of the puncture needle holder, the puncture needle cartridge incorporating the lancet in the puncture holder. Before SL puncture needle protection cap, the puncture needle cartridge according to claim 1 or 2 having one lid-like member for covering the opening of the tubular puncture needle holder.

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