JP4507600B2 - Blood sampling puncture device and puncture needle unit - Google Patents

Description

  The present invention relates to a blood sampling puncture device and a puncture needle unit used for measuring blood sugar levels.

  The present invention relates to a puncture device for blood collection and a puncture needle unit, and more particularly to a technique for performing a puncture operation of the puncture device and attaching / detaching the puncture needle unit.

  The present invention relates to a puncture device for blood collection and a puncture needle unit, and is particularly suitable for use in reducing pain and reducing the impact, vibration and sound, and it can be suitably used for pain reduction, further improving usability. is there.

  A conventional puncture device will be described with reference to FIG. The puncture device is a device in which a disposable puncture needle 37 is attached, a finger tip, an arm, or the like is punctured with a needle 37a at the tip, and bleeding from the punctured site is used for measurement. A typical puncture device 30 includes a cylindrical main body portion 31 and a cap portion 36. A puncture rod 33 that holds a puncture needle 37 and is slidable is incorporated in the main body portion 31, a first spring 32 for driving the attached puncture needle 37, and a second for retreating the punched puncture needle 37. And a firing button 35 for releasing the compressed first spring 32.

In use, the cap 36 is removed from the main body, the puncture needle 37 removed by twisting off the protective cap 37b is mounted on the puncture rod 33 incorporated in the main body, and the cap 36 is attached to the main body again. Then, the first spring 32 is compressed so that the puncture operation is possible, the puncture portion pressing surface 36a of the cap 36 is applied to the puncture portion such as a fingertip, and the puncture rod 33 slides by pressing the firing button 35. The puncture needle 37 attached to the holding portion 33a also slides together, and the surfaces collide with the inner surface of the cap 36. At this time, the tip of the needle 37a slightly protrudes from the puncture hole 36b and punctures the fingertip or the like. Thereafter, the second spring 34 causes the puncture needle 37 to immediately retract from the fingertip or the like. Blood can be collected by this operation. (For example, refer to Patent Document 1.)
Japanese Unexamined Patent Publication No. 2000-237172 (page 3-4, FIG. 1)

  However, in the conventional configuration, in order to perform the puncturing operation, first, the puncture needle in the blood sampling device (puncture instrument) is temporarily held at the position where the first spring is charged, and the puncture operation is released. After the needle is displaced in the puncture direction, that is, moves toward the body range where the tip is punctured, and the puncture needle collides with the puncture device body, it is retracted to the initial position by the action of the second spring and stopped. According to this method, the impact, sound and vibration at the time of puncture are large, and the puncture needle vibrates with a balance of spring force, so that the same place or its vicinity is punctured several times again. It becomes. In addition, when the puncture needle is attached to or detached from the puncture device, when there is no protective cap, the needle is exposed, and the puncture rod is also easily held by a spring, and it may puncture by mistake. Had problems.

  The present invention solves the above-mentioned conventional problems, and can suppress pain and fear due to shock, sound and vibration during the puncturing operation of the puncture needle, and puncture the same location several times again and again. An object of the present invention is to provide a puncture device for blood collection and a puncture needle unit that can prevent the above-mentioned problem, are easy to use, and can be handled safely.

Wherein in order to solve the conventional problem, puncture puncturing device of the present invention, in the puncture device which performs the collection of body fluid from the human body by puncturing the puncture needle to the human body is capable of holding the puncture needle at one end, In order to perform a puncturing operation with the puncture needle, the slider is configured to be reversibly slidable in a linear direction, and is configured to be flat and rotatable about a support shaft. The cam ring has a cam groove that engages with the cam follower, and the cam ring slides the slider by its own rotation, and the cam ring is biased with a rotational force in a certain rotational direction, and the slider is moved in the puncture direction. A ring spring to be slid, a stopper arm that locks or releases the rotation of the cam ring biased by the ring spring, and the strut By releasing the par arm, the cam ring urged by the ring spring is unlocked, the slider moves with the rotation of the cam ring, and the puncture operation is performed. And a ratchet for restricting rotation of the cam ring in one direction so that the slider does not move again in the puncturing direction when the slider moves in a direction away from the puncturing direction. It is.

Also, puncture puncturing device of the present invention, in the puncture device, the stopper arm, the puncture needle has been retracted into the puncture device, and the rotational biasing force to said cam ring by the ring spring acting puncture At the operation ready position, the stopper claw is in contact with the cam ring claw of the cam ring. When the stopper arm is pressed and rotated in this state, the contact between the stopper claw of the stopper arm and the cam ring claw is released. The cam ring is rotated in a certain direction, and the slider is slid in the puncture direction by the rotation of the cam ring, and when the cam ring is rotated beyond the maximum protruding position of the puncture needle, The return prevention claw passes over the ratchet claw of the ratchet while bending the ratchet claw, Rotation in the opposite direction is characterized in that blocked by engagement between the ratchet pawl.

Also, puncture puncturing device of the present invention, in the puncture device, the stopper arm has a stopper for restricting the rotation amount of the cam ring side of the stopper arm, said ratchet to said cam ring side of the ratchet It is characterized by having a stopper for restricting the amount of rotation.

Also, puncture puncturing device of the present invention, in the puncture device, the rotational force of the cam ring, and the ring spring is given by the set ring provided so as to be rotatable cam ring coaxially, cam ring Between the set ring and the set ring, power is transmitted through a clutch spring that transmits only a rotational force in one direction.

Also, puncture puncturing device of the present invention, in the puncture device, the slider has a fitting fixing hole for fixing the puncture needle, the puncture needle, a pierceable needle at its distal end The puncture needle main body has a protrusion for fitting and fixing with the fitting fixing hole on the outer surface of the trunk base, and a detent for the puncture cap that covers the puncture needle main body on the side of the trunk upper portion. A puncture needle unit is composed of a puncture needle body provided with ribs and a puncture cap that is fitted into the rotation-preventing rib and lightly press-fitted into the puncture needle body and covers the puncture needle body. Is.

Also, puncture puncturing device of the present invention, in the puncture device, the puncture needle main body in a state fitted with the puncture cap, nicely fitted by fitting the puncture needle main body portion in the puncture instrument, the After the puncture needle body is attached to the puncture device, the puncture cap is removed from the puncture needle body.

Also, puncture puncturing device of the present invention, in the puncture device, removable from the puncture device of the puncture needle main body with respect to the puncture needle main body portion of the after performing puncturing operation, by press-fitting the puncture cap The puncture needle main body is removed from the puncture device main body together with the puncture cap.

Also, puncture puncture needle unit of the present invention, fitting and fixing of the needle body having a puncturable needle at its distal end, a fitting fixing holes provided in the puncture instrument body on the outer surface of the barrel base A puncture needle main body in which a protrusion for use is provided on the side surface of the upper portion of the body portion with a puncture cap for the puncture cap that covers the puncture needle main body, and the anti-rotation rib is fitted to the puncture needle main body It is characterized by comprising a puncture cap that is lightly press-fitted into and covering the same.

Also, puncture puncture needle unit of the present invention, in the puncture needle unit, the puncture needle body, wherein when the nicely fitting of the puncture device off, engaged with the outer casing inner surface of the lance, its The puncture cap is lightly press-fitted into and covered with the puncture needle body while being fitted to the safety claw, and has a safety claw that prevents falling off.

Also, puncture puncturing device of the present invention, in the puncture device, the puncture cap, one end of the tubular shape, and both of the other end, the puncture needle was punctured operation from the puncture instrument body It has a protective slot for protection.

Also, puncture puncturing device of the present invention, in the puncture device, the puncture cap from one end of the cylindrical shape, the protection slot for protecting the puncture needle is formed, the other end of the tubular shape From the side, a disposal slot that is easily fitted to the puncture needle body is formed from the protective slot for removing the puncture needle that has undergone the puncture operation from the puncture device body and discarding it. Is.

Also, puncture puncturing device of the present invention, in the puncture device, discarding slots of the puncture cap is characterized in that it has a larger opening than the protection slot.

Also, puncture puncturing device of the present invention, in the puncture device, the puncture needle, when disconnected nicely fitting between the puncture instrument engages the outer casing inner surface of the puncture instrument, preventing its falling off It is characterized by having a safety nail.

  According to the puncture device for blood collection and the puncture needle unit according to the present invention, the impact, sound and vibration at the time of puncture are reduced, the puncture by the puncture needle is eliminated multiple times, pain and fear are less, and it is easy to use. A blood collection puncture device and a puncture needle unit that can be handled safely can be provided.

That is, according to the puncture device of the present invention, in the puncture device that punctures the human body with the puncture needle and collects body fluid from the human body, the puncture needle can be held at one end, and the puncture operation by the puncture needle is performed. As is performed, the slider is configured to be reversibly slidable in a linear direction, and is configured to be rotatable around a support shaft in a flat plate shape, and engages with a cam follower provided on the slider in the plane of rotation. A cam ring having a cam groove that slides the slider by its own rotation, and a ring that urges the cam ring to rotate in a certain rotational direction so that the slider slides in the puncture direction. A spring, a stopper arm that locks or releases the rotation of the cam ring biased by the ring spring, and an opening of the stopper arm. The operation unlocks the rotation of the cam ring urged by the ring spring, and after the slider moves as the cam ring rotates and performs a puncturing operation, the cam ring further rotates to move the slider. A ratchet that restricts the rotation of the cam ring in one direction so that the slider does not move again in the puncturing direction when moving in a direction away from the puncturing direction. In addition, there is an effect that it is possible to provide a blood sampling puncture device that reduces the number of sounds and vibrations, eliminates multiple punctures with a puncture needle, has less pain and fear, is easy to use, and can be handled safely.

According to the puncture device of the present invention, the in the puncture device, the stopper arm, the puncture needle has been retracted into the puncture device, and the rotation biasing force acts are puncturing motion to said cam ring by the ring spring In the preparation position, the stopper claw is in contact with the cam ring claw of the cam ring. When the stopper arm is pressed and rotated in this state, the contact between the stopper claw of the stopper arm and the cam ring claw is released. The cam ring rotates in a certain direction, and the cam ring rotates to slide the slider in the puncture direction. When the cam ring rotates beyond the maximum protruding position of the puncture needle, the cam ring returns. The prevention claw passes over the ratchet claw of the ratchet while bending the ratchet claw, Rotation in the opposite direction is prevented by meshing with the ratchet nail, eliminating multiple punctures with a puncture needle, less pain and fear, ease of use, and safe handling There is an effect that a puncture device for blood collection can be provided.

According to the puncture device of the present invention, in the puncture device, the stopper arm has a stopper for restricting the rotation amount of the cam ring side of the stopper arm, said ratchet to said cam ring side of the ratchet Since the stopper provided with the stopper for regulating the amount of rotation is provided, the reliability of the operation of the stopper arm and the ratchet is improved, and there is an effect that an extra load on the cam ring due to friction can be eliminated.

According to the puncture device of the present invention, in the puncture device, the rotational force of the cam ring, and the ring spring, said cam ring and coaxially provided by a set ring provided so as to be rotatable, said cam ring Since the power is transmitted to and from the set ring via a clutch spring that transmits only the rotational force in one direction, the slider is firmly held when the puncture needle is set or removed. Thus, there is an effect that the operability and reliability at the time of setting in a puncturable state can be improved.

According to the puncture device of the present invention, in the puncture device, the slider has a fitting fixing hole for fixing the puncture needle, the puncture needle has a pierceable needle at its distal end A protrusion for fitting and fixing with the fitting fixing hole on the outer surface of the barrel base portion on the puncture needle main body portion, and a rib for preventing rotation against the puncture cap covering the puncture needle main body on the side surface of the barrel portion upper portion Since the puncture needle unit is composed of a puncture needle body that is provided and lightly press-fitted into the puncture needle body by fitting with the anti-rotation rib, and a puncture cap that covers the puncture needle body, A puncture device for blood collection and a puncture needle unit that reduce impact, sound and vibration during puncture, eliminate multiple punctures with a puncture needle, reduce pain and fear, are easy to use, and can be handled safely Can be provided.

According to the puncture device of the present invention, mounted in the puncture device, in a state fitted with the puncture cap to the puncture needle main body portion at nicely fitting the puncture needle main body portion in the puncture instrument, the puncture Since the puncture cap is removed from the puncture needle main body after the needle main body is attached to the puncture instrument, a puncture instrument and a puncture needle unit capable of safely setting the puncture needle are provided. There is an effect that can be done.

According to the puncture device of the present invention, in the puncture device, removable from the puncture device of the puncture needle main body with respect to the puncture needle main body portion of the after performing puncture operation, nicely by press-fitting the puncture cap Since the puncture needle body portion is fitted and removed from the puncture device body together with the puncture cap, a puncture device and a puncture needle unit that can safely dispose of the puncture needle after use are provided. There is an effect that can.

According to the puncture needle unit of the present invention, the puncture needle main body having a puncturable needle at the tip thereof is fitted and fixed to the fitting fixing hole provided in the puncture device main body on the outer surface of the trunk base. A puncture needle main body in which a protrusion for use is provided on the side surface of the upper portion of the body portion with a puncture cap for the puncture cap that covers the puncture needle main body, and the anti-rotation rib is fitted to the puncture needle main body It is made of a puncture cap that is lightly press-fitted into and covered with this, so it reduces shock, sound and vibration during puncture, eliminates multiple punctures with a puncture needle, and less pain and fear. There is an effect that it is possible to provide a puncture needle unit that is easy to use and can be handled safely.

According to the puncture needle unit of the present invention, in the puncture needle unit, the puncture needle body, wherein when the nicely fitting of the puncture device off, engaged with the outer casing inner surface of the lance, its It has a safety claw that prevents it from falling off, and the puncture cap is lightly press-fitted into the puncture needle body while fitting with the safety claw and covers it, so that safer handling is possible In addition, there is an effect that a puncture needle unit can be provided.

According to the puncture device of the present invention, protected at the puncture device, the puncture cap, one end of the tubular shape, and both of the other end, the puncture needle was punctured operation from the puncture instrument body Since it has a protective slot for this purpose, there is an effect that the used puncture needle can be safely discarded.

According to the puncture device of the present invention, in the puncture device, the puncture cap from one end of the cylindrical shape, the protection slot for protecting the puncture needle is formed, the other end of the tubular shape From the protective slot, the disposal slot for easy fitting with the puncture needle body is formed for removing the puncture needle that has undergone the puncture operation from the puncture device body and discarding it. There is an effect that the puncture needle after use can be easily and safely discarded.

According to the puncture device of the present invention, in the puncture device, discarding slots of the puncture cap has a larger opening than the protection slots, since a thing, easily, and safely discard the puncture needle after use There is an effect that can.

According to the puncture device of the present invention, in the puncture device, the puncture needle, when disconnected nicely fitting between the puncture instrument engages the outer casing inner surface of the puncture instrument, to prevent its falling out Since it has a safety nail, there is an effect that it is possible to provide a blood sampling puncture device that can be handled more safely.

Below, the puncture device by embodiment of this invention is demonstrated in detail with drawing.
(Embodiment 1)
FIG. 1 shows a plan view of a puncture device according to Embodiment 1 of the present invention in a puncturable state.

  In FIG. 1, the puncture device main body 1 according to the first embodiment incorporates various parts based on a bottom case 2. A slider 3 has a puncture needle fixing hole 3a for mounting the puncture needle body 4a, a slide groove 3b that serves as a guide during sliding, and a cam follower 3c that is guided by the cam groove, and is slidable to the left and right.

  Reference numeral 4a denotes a puncture needle main body, which has a needle 4c that can puncture a fingertip and the like, and an elastic safety claw 4f at an end, and is attached to the puncture needle fixing hole 3a of the slider 3.

  A cam ring 5 is rotatable about a cam ring support shaft 5a. The cam follower 3c is guided by a continuous cam groove 5b, and the slider 3 is slid left and right by its own rotation. A cam ring claw 5c is formed on the outer shape of the cam ring 5, and can temporarily hold the rotation of the cam ring 5 in correspondence with a stopper arm 6 described later. Reference numeral 5d denotes a return prevention claw formed on the outer shape of the cam ring 5, which is formed at a height different from that of the cam ring claw 5c, and regulates the rotation direction of the cam ring 5 in correspondence with the ratchet 7 described later. Reference numeral 5e denotes a cam ring pin, which has a groove in part and is press-fitted into the cam ring 5.

  Reference numeral 6 denotes a stopper arm, which is rotatable about a stopper arm support shaft 2a constituting the bottom case 2, and has a stopper claw 6a for fixing the cam ring claw 5c at one end and a stopper arm button 6b at the other end. The stopper claw 6a and the return prevention claw 5d are different in height and do not mesh with each other. A stopper arm spring 6c is a resin spring integrally formed with the stopper arm 6 and urges the stopper arm 6 lightly clockwise.

  A ratchet 7 is rotatable about a ratchet support shaft 2b formed on the bottom case 2, and has a ratchet claw 7a that engages with a return prevention claw 5d of the cam ring 5 at one end. The ratchet claw 7a is formed at a height different from that of the cam ring claw 5c and does not mesh. The ratchet spring 7b is a resin spring configured integrally with the ratchet 7, and lightly biases the ratchet 7 clockwise.

  A ring spring 8 is suspended between the ring spring shaft 2c formed on the bottom case 2 and the cam ring pin 5e, and urges the cam ring 5 counterclockwise in the state shown in FIG.

  2f is a puncture needle stopper, and even if the puncture needle body 4a is detached from the slider 3 when unnecessary, it is caught with the safety claw 4f.

  5 shows a puncture needle unit according to Embodiment 1 of the present invention, in which (a) is a perspective view in which a puncture needle body and a puncture cap are integrally formed, and (b) is a puncture needle body and a puncture cap. The perspective view which isolate | separated, (c) is the perspective view which isolate | separated the puncture device, the puncture needle main body, and the puncture cap.

  A puncture needle unit 4 has a puncture cap 4e lightly press-fitted into the puncture needle body 4a. The puncture needle body 4a has a protrusion 4b and a detent rib 4d, and forms a needle 4c at one end. The puncture cap 4e can be fitted into the puncture needle body 4a, and a slot 4g is formed corresponding to the detent rib 4d. Reference numeral 4f denotes a safety claw, which is an elastic resin spring integrally formed from the puncture needle body 4a, and spreads in the outer direction when the puncture cap 4e is removed. Further, it also serves as the anti-rotation rib 4d.

  As shown in puncture cap 4e in FIG. 5 (b), the puncture cap may be formed in a slot 4g having the same shape from both ends so as to cover the puncture needle body 4a, and the puncture cap in FIG. 5 (c). As shown in the cap 4e, even if the shape of the puncture needle body 4a is changed only on one side, that is, the same slot 4g as above is formed on one side, and the other disposal side slot 4h is formed on a different shape. Good. This is intended to make it easier to use the puncture cap 4e when the puncture needle body 4a is discarded. That is, when the puncture needle main body 4a is removed from the puncture needle fixing hole 3a formed on the slider 3 after puncture, the direction inserted into the slot 4h side of the puncture cap 4e is the anti-rotation rib 4d or the safety claw 4f. Relief has been increased for easy entry.

  Further, at one end of the slider 3, there is a puncture needle fixing hole 3a as shown in FIG. 5C, and a hooking claw 3d for hooking the protrusion 4b is formed.

  FIG. 4 is a plan view showing a puncturing operation of the puncture device according to Embodiment 1 of the present invention, where (a) shows a puncture needle set position where the ring spring is most contracted, (b) shows a puncture operation possible position, (C) is a figure which shows the puncture position where the puncture needle protruded to the maximum, respectively.

The operation will be described with reference to these drawings.
First, the puncture needle according to the first embodiment is the puncture needle in which the puncture needle body and the puncture cap in FIG. 5 (a) or FIG. 5 (b) are integrated at the position of FIG. 4 (a). The unit 4 is inserted into the puncture device body 1 as shown in FIG. 5C and set in the puncture needle fixing hole 3 a of the slider 3. As shown in the figure, at the position where the slider 3 and the shape of the puncture needle body 4a match, the puncture needle unit 4 is inserted to the back, the puncture cap 4e is rotated clockwise, and the protrusion 4b is hooked into the claw 3d. I will. The puncture needle body 4a and the puncture cap 4e are lightly press-fitted, but can be reliably rotated by the detent rib 4d or the safety claw 4f and the slot 4g.

  Thereafter, when the puncture cap 4e is pulled out, the puncture needle main body 4a remains on the slider 3 side, and the needle 4c is exposed. However, the needle 4c is housed in the bottom case 2 of the puncture device body 1. If the protrusion 4b and the hooking claw 3d are loose, when the puncture cap 4e is pulled out, the puncture needle body 4a is also pulled out together, and the puncture needle body 4a is not set on the slider 3.

  In the case of the puncture needle unit of FIG. 5B, when the puncture cap 4e is pulled out after the same operation, the elastic safety claw 4f opens in the outer peripheral direction, and by any chance the projection 4b and the hook claw 3d Even if the fixation is removed, it is safer because it does not interfere with the puncture needle stopper 2f.

  Next, when the stopper arm button 6b of the stopper arm 6 is pushed in at the position where the puncturing operation is possible in FIG. 4B, the stopper arm 6 rotates counterclockwise, and the stopper claw 6a and the cam ring claw 5c are engaged. Slip off. Since the cam ring 5 is urged counterclockwise by the ring spring 8 and the cam follower 3c is in an inclined portion beyond the inflection point where the radius of the cam groove 5b changes, the cam ring 5 rotates counterclockwise. Start. The cam follower 3c is guided by the cam groove 5b, the slider 3 slides to the left, and the needle 4c configured on the puncture needle body 4a also slides to the left.

  FIG. 4C shows a puncture position where the needle 4c of the puncture needle body 4a protrudes from the puncture device body 1 to the maximum, and a puncture with a finger or the like is possible. From this position, both the rotational force of the cam ring 5 and the counterclockwise biasing force of the ring spring 8 cause the cam ring 5 to further rotate counterclockwise, and the puncture in which the ring spring 8 in FIG. Stops at the needle setting position. This position is a flat position beyond an inflection point where the radius of the cam groove 5b changes from a region where the radius changes to a region where the radius does not change, and the slider is guided in the right direction by the cam follower 3c guided by the cam groove 5b. The puncture needle body 4a is the most retracted position.

  In the position of FIG. 4A, the ring spring 8 does not generate a force for rotating the cam ring 5, and the cam ring 5 is the most stable position. If the cam ring rotates counterclockwise from the position shown in FIG. 4A, the ring spring 8 generates a force that rotates the cam ring 5 clockwise, and returns to the position shown in FIG. 4A.

  Usually, at this position, the puncture needle body 4a is set in or removed from the puncture needle fixing hole 3a of the slider 3. At this time, the cam follower 3c of the slider 3 is guided by the cam groove 5b, and the slider 3 is firmly held so as not to move.

  In addition, at a position between FIG. 4C and FIG. 4A, the return prevention claw 5d formed on the cam ring 5 passes through the ratchet claw 7a formed on the ratchet 7 while being bent. Even if 5 attempts to rotate in the clockwise direction, the return preventing claw 5d and the ratchet claw 7a mesh with each other to prevent the rotation. Therefore, multiple punctures to the finger or the like by the needle 4c do not occur.

  When the puncture is completed, the puncture cap 4e is inserted into the puncture device main body 1 at the position shown in FIG. 4A, and the slot 4g or the disposal slot 4h is engaged with the rotation prevention rib 4d or the safety claw 4f of the puncture needle main body. When the puncture cap 4e is turned counterclockwise, the protrusion 4b is separated from the hooking claw 3d. Thereafter, when the puncture cap 4e is pulled out, the puncture needle body 4a in a press-fitting relationship is pulled out together. Of course, the needle 4c is protected by the puncture cap 4e.

  As described above, in the first embodiment, the puncture needle holding mechanism is provided on the distal end side, the slider that can be slid and the continuous cam groove are provided, the fulcrum can be rotated around the support shaft, and the rotational operation A cam ring with a claw that restricts the rotation of the cam ring, a ring spring that urges the cam ring to rotate, a stopper arm that can rotate and hold and release the rotation of the cam ring, and can rotate and regulate the direction of rotation of the cam ring. A puncture needle body formed by integrally forming a projection that is fixed to the puncture instrument body, a non-rotating rib or a safety nail having elasticity, and a puncturable needle; Since the puncture needle unit is composed of a puncture cap that is lightly press-fitted into the needle body, the puncture needle and the puncture device body do not collide at the time of puncture, and the needle of the puncture needle comes out of the puncture device body only once It can be. Furthermore, when setting and removing the puncture needle, the slider is firmly held, reducing impact, sound and vibration during puncture, eliminating multiple punctures with the puncture needle, less pain and fear, easy handling, A puncture device for blood collection and a puncture needle unit can be provided.

  FIG. 2 is a plan view showing a puncture operation of the puncture device according to the modification of the first embodiment of the present invention, in which some of the main parts are changed. That is, the stopper arm spring 6c that is a resin spring integrally formed with the stopper arm 6 of the first embodiment is eliminated, and the stopper arm spring 9 that is a metal spring is hooked between the bottom case 2 and the stopper arm 6, so that the stopper arm Apply a slight clockwise bias to 6. Furthermore, the stopper arm pin 2d is formed from the bottom case 2, and the rotational position of the stopper arm 6 in the clockwise direction is restricted, thereby improving the reliability of the operation of the stopper arm 6 and extra friction to the cam ring 5 due to friction. The load can be eliminated.

  Similarly, the ratchet spring 7b, which is a resin spring integrally formed with the ratchet 7, is eliminated, and the ratchet spring 10, which is a metal spring, is hooked between the bottom case 2 and the ratchet 7, so that the ratchet 7 is lightly biased in the clockwise direction. Add. Further, by forming a ratchet pin 2e from the bottom case 2 and restricting the rotational position of the ratchet 7 in the clockwise direction, the operation reliability of the ratchet 7 is improved, and an extra load on the cam ring 5 due to friction is eliminated. Thus, the operation of the puncture device body can be made smoother.

(Embodiment 2)
FIG. 3 (a) shows a side view of a puncture device according to Embodiment 2 of the present invention, and FIG. 3 (b) is a detailed view of a part thereof.

Reference numeral 12 denotes a set ring, which is concentric with the cam ring support shaft 5a, and the clutch spring 11 is assembled into both the set ring support shaft 12a and the cam ring support shaft 5a by fitting. 11a is an end foot of the clutch spring 11, which is inserted and fixed between two fixed bosses 12b provided on the set ring 12. Here, when the clutch spring 11 rotates the set ring 12 in the right screw direction (indicated in the figure), this is the narrowing direction, and the cam ring support shaft 5a is rotated together, and the cam ring 5 is shown in FIG. Rotate clockwise. Further, when the set ring 12 is rotated in the left screw direction (the direction opposite to the instruction in the drawing), this is a loosening direction, the cam ring support shaft 5a rotates idle, and the cam ring 5 does not rotate.
By adding these elements, the operability and reliability of the puncture device body can be further improved.

  4A, the puncture needle body 4a is set on the slider 3, and the set ring is rotated counterclockwise until the cam ring claw 5c of the cam ring 5 comes into contact with the stopper claw 6a of the stopper arm 6. Enable operation. At this time, even if the set ring 12 is rotated in the clockwise direction, the clutch spring 11 is loosened and the cam ring 5 is merely idled. The following puncturing operation is the same as in the first embodiment.

  As described above, in the second embodiment, the distal end side has a puncture needle holding mechanism, has a slidable slider, a continuous cam groove, can rotate around a support shaft, and rotates. A cam ring with a claw that restricts the rotation of the cam ring, a ring spring that urges the cam ring to rotate, a stopper arm that can rotate and hold and release the rotation of the cam ring, and can rotate and regulate the direction of rotation of the cam ring. The puncture device is composed of a ratchet to be rotated, a rotatable set ring that is coaxial with the cam ring, and a clutch spring that transmits rotation between the cam ring and the set ring, and further, a protrusion that is fixed to the puncture device body, and a detent A puncture needle with a rib or elastic safety nail, a puncture needle body integrally formed with a punctureable needle, and a puncture cap lightly press-fitted into the puncture needle body Since it is configured knit, puncture needle and the puncture device does not collide when the puncture, also needle of the puncture needle can be made out from the puncture instrument body once.

  Furthermore, when setting and removing the puncture needle, the slider is firmly held, and in addition, when setting the puncture state, operability and reliability are improved, and the impact, sound and vibration during puncture are reduced, and puncture is performed. It is possible to provide a puncture device and a puncture needle unit that eliminates multiple punctures with a needle, is easy to handle with little pain and fear, and is highly reliable in operation.

  A puncture device according to the present invention reduces impact, sound and vibration during puncture, eliminates multiple punctures with a puncture needle, has less pain and fear, is easy to handle, and has high operation reliability, and A puncture needle unit can be provided, which is useful when using a measuring instrument that requires blood collection.

The top view of the position which can puncture the puncture device by Embodiment 1 of this invention The figure which shows what changed a part of main components in the top view of the position which can be punctured of the puncture device by Embodiment 1 of this invention Side view of a puncture device according to Embodiment 2 of the present invention It is a side view of the puncture device by Embodiment 2 of this invention, and is a detail drawing of a part The top view which shows the puncture operation | movement of the puncture device by Embodiment 1 of this invention, and is a figure which shows a puncture needle set position The top view which shows the puncture operation | movement of the puncture device by Embodiment 1 of this invention, The figure which shows a puncture operation | movement possible position The top view which shows the puncture operation | movement of the puncture device by Embodiment 1 of this invention, and is a figure which shows the puncture position where the puncture needle protruded the maximum 1 is a diagram showing a puncture needle unit according to Embodiment 1 of the present invention, and is a perspective view in which a puncture needle body and a puncture cap are configured integrally; FIG. 1 is a diagram showing a puncture needle unit according to Embodiment 1 of the present invention, and is a perspective view in which a puncture needle body and a puncture cap are separated from each other 1 is a diagram showing a puncture needle unit according to Embodiment 1 of the present invention, and is a perspective view in which a puncture device, a puncture needle body, and a puncture cap are separated from each other A perspective view showing a conventional puncture device

Explanation of symbols

1 Puncture device body 2 Bottom case 2a Stopper arm support shaft 2b Ratchet support shaft 2c Ring spring shaft 2d Stopper arm pin 2e Ratchet pin 2f Puncture needle stopper 3 Slider 3a Puncture needle fixing hole 3b Slide groove 3c Cam follower 3d Hook claw 4 Puncture needle unit 4a Puncture needle body 4b Protrusion 4c Needle 4d Non-rotating rib 4e Puncture cap 4f Safety claw 4g Slot 4h Disposal side slot 5 Cam ring 5a Cam ring spindle 5b Cam groove 5c Cam ring claw 5d Return prevention claw 5e Cam ring pin 6 b Stopper arm 6 B Stopper arm 6 Stopper arm button 6c Stopper arm spring 7 Ratchet 7a Ratchet claw 7b Ratchet spring 8 Ring spring 9 Stopper arm spring 10 Ratchet Spring 11 Clutch spring 11a End foot 12 Set ring 12a Set ring support shaft 12b Fixed boss 30 Puncture device 31 Main body portion 32 First spring 33 Puncture rod 33a Holding portion 34 Second spring 35 Fire button 36 Cap 36a Puncture portion pressing Surface 36b Puncture hole 37 Puncture needle 37a Needle 37b Protective cap

Claims (10)

In a puncture device that punctures the human body with a puncture needle and collects body fluid from the human body,
A slider that is capable of holding a puncture needle at one end, and is slidable in a linear direction so as to be punctured by the puncture needle;
A cam ring configured to be rotatable about a support shaft in a flat plate shape, having a cam groove that engages with a cam follower provided in the slider in the plane of rotation, and sliding the slider by its own rotation;
A ring spring that urges the cam ring to rotate in a certain rotational direction and causes the slider to slide in the direction of puncture;
A stopper arm capable of locking the rotation of the cam ring biased by the ring spring or releasing the locking;
After the stopper arm is released, the cam ring urged by the ring spring is unlocked, and the slider moves with the rotation of the cam ring to perform the puncturing operation. A ratchet that restricts rotation of the cam ring in one direction so that the slider does not move again in the puncture direction when the slider moves in a direction away from the puncture direction by rotation ,
The stopper arm has a stopper claw and a cam ring claw of the cam ring at a puncture operation preparation position where the puncture needle is retracted into the puncture device and a rotational biasing force is applied to the cam ring by the ring spring. Abut,
When the stopper arm is pressed and rotated in this state, the contact between the stopper claw of the stopper arm and the cam ring claw is released, and the cam ring rotates in a certain direction.
When the cam ring rotates and the slider slides in the puncture direction and the cam ring rotates beyond the maximum protruding position of the puncture needle, the cam ring return prevention claw is located on the ratchet claw of the ratchet. Passing through the ratchet claw while being bent, and rotation in the opposite direction is prevented by meshing with the ratchet claw.
A puncture device characterized by that. The puncture device according to claim 1 ,
The stopper arm has a stopper that regulates the amount of rotation of the stopper arm toward the cam ring,
The ratchet includes a stopper that regulates the amount of rotation of the ratchet toward the cam ring.
A puncture device characterized by that. The puncture device according to claim 1 ,
The rotational force of the cam ring is given by the ring spring and a set ring provided so as to be rotatable coaxially with the cam ring,
Between the cam ring and the set ring, power is transmitted via a clutch spring that transmits only rotational force in one direction.
A puncture device characterized by that. The puncture device according to claim 1 ,
The slider has a fitting fixing hole for fixing the puncture needle,
The puncture needle has a puncture needle main body having a puncturable needle at its tip, a fitting fixing projection with the fitting fixing hole on the outer surface of the trunk base, and a side surface of the trunk upper portion. A puncture needle body provided with a rib for preventing rotation against the puncture cap that covers the puncture needle body;
A puncture needle unit is composed of a puncture cap that is fitted with the detent rib and is lightly press-fitted into the puncture needle body, and covers this.
A puncture device characterized by that. The puncture device according to claim 4 ,
With the puncture cap body attached to the puncture needle main body, the puncture needle main body is attached to the puncture device by fitting.
After the puncture needle main body is attached to the puncture device, the puncture cap is removed from the puncture needle main body.
A puncture device characterized by that. The puncture device according to claim 4 ,
Removal of the puncture needle body from the puncture device,
The puncture cap is press-fitted into the puncture needle body after performing the puncture operation,
The puncture needle body part is removed from the puncture device body together with the puncture cap,
A puncture device characterized by that. The puncture device according to claim 4 ,
The puncture cap has a protective slot for protecting the puncture needle that has performed a puncture operation from the puncture device body from both one end side and the other end side of the cylindrical shape.
A puncture device characterized by that. The puncture device according to claim 4 ,
The puncture cap is formed with a protective slot for protecting the puncture needle from one end side of the cylindrical shape, and the puncture needle that has been punctured from the other end side of the cylindrical shape is inserted into the puncture device body. From the protective slot, a disposal slot that is easy to fit with the puncture needle body is formed for removal from the disposal.
A puncture device characterized by that. The puncture device according to claim 8 ,
The disposal slot of the puncture cap has an opening larger than its protective slot;
A puncture device characterized by that. The puncture device according to claim 1 ,
The puncture needle has a safety claw that engages with the inner surface of the outer case of the puncture device and prevents the puncture device from falling off when the puncture device is loosely fitted with the puncture device.
A puncture device characterized by that.

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