JP4482320B2 - Blood sampling puncture device - Google Patents

Description

  The present invention relates to a blood sampling puncture device used for measuring blood sugar level, and more particularly to a puncture device configured to prevent vibration and impact of a main body during puncture and multiple punctures.

  Diabetes patients themselves measure blood sugar levels several times a day. At the time of this measurement, it is necessary to collect a small amount of blood from the fingertip or the like. For this purpose, as shown in FIG. 8, a disposable puncture needle 105 is attached to a device called a puncture device 101, and a puncture needle 105 punctures a fingertip, an arm, etc., and measures bleeding from the puncture site. Used for.

  A typical puncture device 101 includes a cylindrical main body portion 130 and a cap portion 153. The cylindrical main body portion 130 releases the first spring 132 for driving the attached puncture needle 105, the second spring 134 for retracting the punched puncture needle 105, and the compressed first spring 132. Has a launch button 117.

In use, the cap 153 is removed from the cylindrical main body portion 130, the puncture needle 105 is attached to the cylindrical main body portion 130, and the cap 153 is put on the cylindrical main body portion 130 again. Then, the first spring 132 is compressed to enable the puncturing operation, the puncture portion pressing surface 136 of the cap 153 is applied to the puncture portion such as a fingertip, and the firing button 117 is pressed, the puncture needle 105 is ejected. Puncture is performed. After the puncture is performed, the puncture needle 105 is immediately retracted from the fingertip or the like by the second spring 134. A general puncture device 101 can collect blood by the above-described operation (see, for example, Patent Document 1).
Japanese Unexamined Patent Publication No. 2000-237172 (page 3-4, FIG. 1)

  However, in the conventional general puncture device 101, the puncture needle 105 once punctured may vibrate due to the vibration of the first spring 132 and puncture the same place or its vicinity again. There is a problem that occurs.

  On the other hand, in order to perform the puncturing operation, first, the puncture needle in the blood sampling device (puncture device) is moved or displaced in the puncture direction, that is, the tip is moved toward the body range to be punctured, and then It is necessary to pull it back to the initial position as quickly as possible to stop it, and to make the sound during puncture as small as possible.

  Therefore, the present invention has been devised to solve the conventional problems as described above, and the puncture operation of the puncture needle is made only one reciprocation at the time of puncture, so that the same portion is repeated twice or three times. An object of the present invention is to provide a puncture device for collecting blood or other bodily fluids that can prevent puncture and eliminate the pain caused by extra puncture and the discomfort due to the impact sound generated when the puncture needle is punctured.

In order to solve the above-mentioned problem, a puncture device according to claim 1 of the present invention is a puncture device comprising a puncture needle holding mechanism for holding a puncture needle on the distal end side, behind the puncture needle holding mechanism. A puncture needle holding rod capable of reciprocating sliding movement in the axial direction is provided, and a link mechanism is engaged with the other end of the puncture needle holding rod so that the flywheel can rotate with respect to the link mechanism. An elastic biasing member that is attached and biases the flywheel in a certain direction around its rotation axis is provided on the flywheel. The shaft of the other end of the link mechanism connected to the puncture needle holding rod is provided on the flywheel. implanted a wheel engagement pin to be, its tip, said wheel engaging pin and the puncturing button abuts at a certain position of said flywheel, operably disposed externally of the puncture device, before A wheel set pin is further provided on the flywheel, and a set lever mechanism that engages with the wheel set pin and rotates the flywheel only in one direction and sets the puncture preparation position is provided. An elastic member is provided for returning the lever mechanism to the initial position when the tip of the puncture button and the wheel engagement pin are disengaged. The pain at the time of puncture due to needle blurring or double puncture can be reduced.

The puncture device according to claim 2 of the present invention is the puncture device according to claim 1, wherein the wheel engagement pin engages with an engagement portion of a reverse rotation prevention claw of the puncture device, The puncture needle holding rod is fixed at a position after the puncture operation in the axial direction, and the wheel engagement pin constitutes a puncture preparation locking mechanism that determines a preparation position for puncture, Thereby, rotation operation of a flywheel can be stopped efficiently.

  The puncture device according to claim 3 of the present invention is the puncture device according to claim 2, wherein the elastic biasing member rotates the flywheel around its axis in a certain rotational direction. An urging force is applied to the stopping mechanism. This makes it possible to efficiently apply the urging force to the flywheel with a simple configuration.

  The puncture device according to claim 4 of the present invention is characterized in that, in the puncture device according to claim 3, the elastic biasing member that applies a biasing force to the puncture preparation locking mechanism is formed of a kick spring. Thus, with the puncture device according to the first aspect, the driving force for linearly delivering the puncture needle to the puncture position can be obtained without difficulty with a simple configuration.

The puncture device according to a fifth aspect of the present invention is the puncture device according to the second aspect, wherein the wheel engagement pin of the puncture preparation locking mechanism has the puncture device from the rotation center of the flywheel in the puncture preparation state. It is arranged on the needle holding rod side. Accordingly, the puncture operation can be performed after the flywheel is securely stopped by the puncture device according to the first aspect.

According to the present invention, a blood collection operation at the time of blood glucose level measurement can be performed with a simple configuration and a simple operation.
In particular, in the past, during the puncturing operation for blood sampling performed every time the blood sugar level was measured, the operator sometimes had pain and fear due to the sound and vibration of the puncture device. However, he no longer hates blood collection.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
1 is an external perspective view of a puncture device according to Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view showing an internal configuration of the puncture device, and FIG. 3 is an external view of a puncture needle used in the puncture device. It is a perspective view shown. The puncture device and the puncture needle are used when collecting a small amount of blood such as when measuring a blood glucose level. FIG. 4 is a diagram illustrating an operation of setting a puncture needle on the instrument body in order to perform a puncture operation.

  As shown in FIGS. 1 and 2, the puncture device 1 according to the first embodiment of the present invention includes a puncture depth adjusting ring 40 whose tip is a puncture needle loading port 9, a main body upper case 2, and a main body bottom case. 3, a puncture needle holding rod 4, a link mechanism 19, a flywheel 11, a puncture set lever 8, a puncture button 17, a flywheel set spring 13 and the like are provided in the main body upper case 2 and the main body bottom case 3. It has been. The puncture needle 5 is inserted and loaded into the puncture needle holding rod 4 to a predetermined depth.

  The puncture needle 5 has a configuration as shown in FIG. 3 and is divided into a front end portion and a rear end portion with the puncture needle separation groove 5a as a boundary. In the puncture needle separation groove 5a, a resin thin film (for example, And a thickness of 0.1 mm or less). The puncture needle 5 is set in a state of being buried in the distal end cap portion 18, and a distal end cap portion 18 is provided with a puncture needle disposal cap 41 for extracting the puncture needle 5 after puncture.

  Here, an operation procedure for setting the puncture needle 5 to the puncture device 1 and preparing for puncture will be described with reference to FIG.

  First, the puncture needle 5 is inserted into the puncture needle loading port 9 of the puncture device 1 while aligning the axes of the puncture needle loading port 9 of the puncture device 1 and the puncture needle 5 without setting the puncture needle set lever 8. Push in (FIG. 4A). At this time, the rear end portion of the puncture needle 5 guided into the puncture needle holding rod 4 of the puncture device 1 pushes the bottom surface of the puncture needle loading chamber 10 of the puncture needle holding rod 4 to a position where it is pushed. In this state, the puncture needle 5 is press-fitted and fitted into the inner wall of the puncture needle loading chamber 10 of the puncture needle holding rod 4 (FIG. 4B). Here, when the distal end cap portion 18 is separated from the puncture device 1 while twisting, the puncture device 1 pulls the puncture needle 5 away from the distal end cap portion 18. At this time, a force for tearing the resin thin film is generated in the puncture needle separation groove 5 a in the vicinity of the tip of the puncture needle 5. When the operator applies further force against this force, the puncture needle 5 is pulled away from the distal end cap portion 18 (FIG. 4C).

  Thereafter, when the puncture needle set lever 8 is tilted in the direction of the arrow A by a predetermined angle for puncturing, the state shown in FIG. Hereinafter, the preparation operation and the puncturing operation will be described with reference to FIG.

  First, the puncture depth adjustment ring 40 at the distal end of the puncture device 1 is rotated around the axis to shift the position of the puncture depth adjustment ring 40 in the axial direction of the puncture device 1 in advance. The puncture depth of the puncture needle 5 is set.

  Thereafter, as shown in FIG. 4, after the puncture needle 5 is loaded into the puncture needle holding rod 4, the puncture needle set lever 8 is tilted by a predetermined angle in the direction of arrow A as shown in FIG. Then, the wheel rotation lever portion 8a located at the position opposite to the puncture needle set lever 8 with respect to the rotation center 8b of the puncture needle set lever 8 is simultaneously moved in the lower right direction in FIG. Rotate clockwise. When the wheel rotation lever portion 8a is rotated to the lower right in the drawing (counterclockwise), the rotation lever portion 8a is brought into contact with the set pin 12 disposed on the flywheel 11 and rotates. By driving, the flywheel 11 rotates by a predetermined angle.

  Here, in a state where the puncture needle set lever 8 is tilted at a predetermined angle in the direction of the arrow A shown in the drawing, the distance between the rotation center 8b of the puncture needle set lever 8 and the rotation center 11b of the flywheel 11 is In comparison, by setting the distance between the rotation center 8b of the puncture needle set lever 8 and the center axis of the set pin 12 to be long, a wheel rotation portion (rotation lever portion) on the puncture needle set lever 8 is set. ) 8a can rotate the flywheel 11 to the set direction side (the direction of arrow B in FIG. 5A).

  Further, as shown in FIG. 5A, the wheel engagement pin 16 disposed on the flywheel 11 is always pressed by the flywheel set spring 13 at a position where the flywheel 11 is rotated by a predetermined angle. Since the maintained state is maintained, the flywheel 11 tries to continue to rotate in the direction of arrow B in FIG. 5A (counterclockwise), that is, at a predetermined rotational position, that is, the rotation center 11b of the flywheel 11. And the rotation after the distance connecting the center of the wheel engagement pin 16 and the rotation center 8b of the puncture needle set lever 8 becomes longer than the distance between the rotation center 8b of the puncture needle set lever 8 and In the position, the flywheel 11 starts to rotate spontaneously only by the pressing force of the flywheel set spring 13, and then the wheel engaging pin 16 of the rotating flywheel 11 is rotated. Tip, when the pivotally supported have been the tip portion of the puncture button 17 contacts the tip portion of the wheel engagement pin stop portion 17a person, its rotation stops.

  As the flywheel 11 rotates as described above, the puncture needle holding rod connected to the flywheel 11 by the link 19 that converts the rotational movement of the flywheel 11 into the sliding movement of the puncture holding rod 4. 4 slides in the axial direction of the puncture device 1. The wheel engaging pin 16 on the flywheel 11 and the puncture needle holding rod 4 are engaged by a single link 19, and the flywheel 11 is determined by the puncture needle set lever 8 as described above. (The counterclockwise direction in the figure), the wheel engagement pin 16 rotates in the direction away from the puncture needle holding rod 4, and the puncture needle holding rod 4 is punctured. Sink into the body of the instrument 1. Thereafter, as described above, the tip of the wheel engagement pin 16 of the flywheel 11 is engaged and rotated by the wheel engagement pin stopper 17a which is the tip of the puncture button 17 pivotally supported. When the movement is stopped, the movement of the puncture needle holding rod 4 is also stopped at the same time, and the flywheel 11 is in a state where the rotating force is stored by the urging force of the flywheel set spring 13 to complete the setting (FIG. 5). (A)).

Thereafter, when the puncture button 17 is pressed, the puncture button 17 rotates about its axis 17b, and the engagement between the wheel engagement pin stopper 17a and the wheel engagement pin 16 is released, and the flywheel 11 Rotates around the shaft 11b in the direction of arrow B (counterclockwise). At this time, the puncture needle holding rod 4 connected to the flywheel 11 and the link 19 starts a sliding movement (linear movement) from the inside of the puncture device 1 to the outside. Then, after passing through the position protruding from the puncture device 1 to the maximum position (FIG. 5B) by the rotation of the flywheel 11, the puncture is performed by the pressing force of the flywheel set spring 13 and the inertial force of the flywheel 11. An operation of returning to the instrument 1 is performed. During this return operation, the wheel engagement pin 16 at the tip of the link 19 reaches the farthest position from the line connecting the rotation center 8b of the puncture needle set lever 8 and the rotation center 11b of the flywheel 11, and this position Until it stops at, the restoring force of the flywheel set spring 13 causes the puncture needle holding rod 4 to be stopped from the puncture device 1 while being attenuated and stopped while reciprocating around the position. Since it is necessary not to return in the protruding direction, the main body bottom case 3 is reversely rotated to engage with the wheel engagement pin 16 so that the operation of the wheel engagement pin 16 is not returned to the puncture position direction. A prevention claw 20 is provided, and the reverse rotation prevention claw 20 is arranged so that the reverse rotation prevention claw 20 does not become a load with respect to the rotation operation of the wheel engagement pin 16. In part, that it has provided the angle of attack 20a (FIG. 5 (c)).

  Here, when the wheel engagement pin 16 on the flywheel 11 rotates to a predetermined position, it comes into contact with the tip of the flexible reverse rotation prevention claw 20. The wheel engaging pin 16 that continues to rotate is placed on the upper surface (illustrated) of the reverse rotation prevention claw 20, and the claw 20 is pushed down to the lower left in the figure to slide, and the reverse rotation prevention claw 20 passes through the upper surface at the moment. Returning to the original state, the wheel engaging pin 16 is engaged. That is, the angle of attack 20a is such that the wheel engagement pin 16 can smoothly rest on the upper surface of the reverse rotation prevention claw 20 and pass therethrough so as not to become a load with respect to the rotation operation of the wheel engagement pin 16. It is a suitable angle. Thus, this puncture device is provided with a reverse rotation prevention mechanism that does not become a load with respect to the rotation operation of the wheel engagement pin 16 (FIG. 5C).

  Next, an operation of discarding the puncture needle 5 after the puncture operation is completed will be described with reference to FIG.

  When the puncture depth adjusting ring 40 on the puncture needle loading port 9 side of the puncture device 1 is removed in the state where the puncture operation is completed, the tip of the puncture needle 5 is exposed (FIG. 6A). In this state, a puncture needle disposal cap 41 for capping and removing the puncture needle after use at the other end of the tip cap portion 18 that has capped the tip end portion of the puncture needle 5 before use, and the puncture When the tip of the puncture needle 5 is pushed into the puncture needle disposal cap 41 while aligning the axis with the tip of the needle 5, the puncture needle 5 is taken into the puncture needle disposal cap 41 (FIG. 6 ( b)). Thereafter, the tip cap portion 18 is pulled out from the puncture device 1 together with the puncture needle 5, whereby the disposal operation of the used puncture needle 5 is completed (FIG. 6 (c)). It can be safely and easily discarded without being exposed.

  Therefore, by repeating the above series of operations, the puncture operation performed at the time of blood glucose level measurement can be easily performed, and the operator can perform the puncture setting operation by rotating the puncture needle set lever 8. When puncture button 17 is pressed in the puncture preparation state, puncture and blood collection operations can be performed as shown in FIG.

Thus, in the puncture device for blood collection according to the first embodiment, the puncture needle holding rod 4 that holds the puncture needle 5 and is capable of sliding movement in the axial direction thereof, and the flywheel 11 that is pivotally supported and rotated. One end engages with the other end side of the puncture needle holding rod 4 and the other end engages with a wheel engagement pin 16 implanted in the flywheel 11 to hold the rotational movement of the flywheel 11 with the puncture needle. The flywheel 11 is engaged by engaging a link 19 for converting the sliding motion of the rod 4, a spring 13 for biasing the flywheel 11 around a rotation axis thereof, and a set pin 12 implanted in the flywheel. 11 is disposed in the main body case, a set lever 8 that rotates only in one direction and is set at a puncture preparation position, an end portion of which is in contact with the wheel engagement pin 16 and operable from the outside. wheel A reverse rotation preventing pawl 20 for locking the engagement pin 16 provided, the wheel engaging pin 16, rotating pawl 20 engage with the puncture needle holding rod 4 in position after puncturing motion in the axial direction Further, the wheel engagement pin 16 constitutes a puncture preparation locking mechanism that determines the preparation position for puncture, and the spring 13 applies a biasing force to the puncture preparation locking mechanism to cause the flywheel 11 to move. Since the rotation is made only in a certain direction around the rotation axis, the flywheel 11 is reliably driven and rotated with a simple configuration, and the puncture needle is protruded from the main body device to perform the puncture operation, and then retracted immediately. In addition, the reverse rotation prevention claw 20 makes it possible to prevent the puncture needle from protruding from the puncture device body again due to the vibration of the spring 13 after the puncture needle has retracted into the puncture device body. To prevent vibration and impact noise of the body at the time of thorns, it is possible to suppress the pain and discomfort of the user at the time of puncture.

  The puncture device for blood collection according to the present invention has an effect of preventing vibration and impact of the main body at the time of puncture and furthermore, puncture multiple times, and is used when measuring a blood sugar level or the like. It is useful as a puncture device for blood collection.

It is an external appearance perspective view of the puncture device by Embodiment 1 of this invention. It is sectional drawing which shows the internal structure of the puncture device by the said Embodiment 1. FIG. It is a top view which shows the internal structure of the puncture device by the said Embodiment 1. FIG. It is a perspective view which shows the puncture needle used for the puncture device by the said Embodiment 1. FIG. It is a figure which shows the usage method which loads the puncture needle used for the puncture device by the said Embodiment 1. FIG. It is a figure which shows the usage method which loads the puncture needle used for the puncture device by the said Embodiment 1. FIG. It is a figure which shows the usage method which loads the puncture needle used for the puncture device by the said Embodiment 1. FIG. It is a figure which shows the operation method of the puncture preparation of the puncture device by the said Embodiment 1. FIG. It is a figure which shows the operation method of the puncture preparation of the puncture device by the said Embodiment 1. FIG. It is a figure which shows the operation method of the puncture preparation of the puncture device by the said Embodiment 1. FIG. It is a figure which shows the discard operation | movement of the puncture needle with which the puncture device by the said Embodiment 1 was mounted | worn. It is a figure which shows the discard operation | movement of the puncture needle with which the puncture device by the said Embodiment 1 was mounted | worn. It is a figure which shows the discard operation | movement of the puncture needle with which the puncture device by the said Embodiment 1 was mounted | worn. It is a perspective view which shows the puncture operation by the puncture device by the said Embodiment 1. FIG. It is a perspective view which shows the example of the conventional puncture device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Puncture device 2 Main body upper case 3 Main body bottom case 4 Puncture needle holding rod 5 Puncture needle 5a Puncture needle separation groove 6 Wheel shaft support portion 8 Puncture needle set lever 8a Wheel rotation lever portion 8b Set lever rotation shaft 9 Puncture needle loading port DESCRIPTION OF SYMBOLS 10 Puncture needle loading chamber 11 Flywheel 12 Set pin 13 Flywheel set spring 14 Lever return spring 15 Push button spring 16 Wheel engagement pin 17 Puncture button 18 Tip cap 20 Reverse rotation prevention claw 20a Angle of attack 40 Puncture depth adjustment ring 41 Puncture Needle Disposal Cap 130 Cylindrical Body Part 131 Protruding Rod Rear End 132 First Spring 133 Lower Case 134 Second Spring 136 Puncture Port Pressing Surface 153 Cap

Claims (5)

A puncture device comprising a puncture needle holding mechanism for holding a puncture needle on the distal end side,
A puncture needle holding rod capable of reciprocating sliding movement in the axial direction is provided behind the puncture needle holding mechanism,
A link mechanism is engaged with the other end of the puncture needle holding rod,
A flywheel is rotatably attached to the link mechanism,
An elastic urging member that urges the flywheel in a fixed direction around its rotational axis is provided,
On the flywheel , a wheel engagement pin serving as an axis of the other end of the link mechanism connected to the puncture needle holding rod is implanted,
A puncture button whose tip is in contact with the wheel engagement pin at a position of the flywheel is provided to be operable from the outside of the puncture device,
A wheel set pin is further provided on the flywheel,
A set lever mechanism is provided that engages with the wheel set pin and rotates the flywheel in only one direction to set the puncture preparation position.
An elastic member is provided for returning the set lever mechanism to the initial position when the tip of the puncture button and the wheel engagement pin are disengaged.
A puncture device characterized by that. The puncture device according to claim 1,
The wheel engagement pin is engaged with an engagement portion of a reverse rotation prevention claw of the puncture device to fix the puncture needle holding rod at a position after the axial puncture operation , and further, the wheel engagement The pin constitutes a puncture preparation locking mechanism that determines the preparation position for puncture.
A puncture device characterized by that. The puncture device according to claim 2,
The elastic biasing member applies a biasing force to the puncture preparation locking mechanism so as to rotate the flywheel around its axis in a certain rotational direction.
A puncture device characterized by that. The puncture device according to claim 3,
An elastic biasing member that applies a biasing force to the puncture preparation locking mechanism comprises a kick spring.
A puncture device characterized by that. The puncture device according to claim 2,
The wheel engagement pin of the puncture preparation locking mechanism is arranged closer to the puncture needle holding rod than the rotation center of the flywheel in the puncture preparation state.
A puncture device characterized by that.

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