JP2005253781A - Cap for puncture instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cap for a puncture instrument allowing a user of the puncture instrument to safely and easily remove a used lancet from a body and dispose of it, and allowing a treatment contractor or the like to safely handle the disposed lancet. <P>SOLUTION: This cap 1 for the puncture instrument is provided with a pushing member 2, and the pushing member 2 and the lancet 6 are engaged with each other by pushing the member 2 to fix the cap 1 for the puncture instrument to the lancet 6 easily. Even if the used lancet fixed to the cap 1 for the puncture instrument is disposed of, the needle of the lancet 6 is covered with the cap 1 for the puncture instrument to allow the safe handling of the used lancet. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a puncture device cap, and more particularly to a puncture device cap that allows a used lancet to be safely removed from a main body and discarded.

Because of the danger that bacteria and viruses that cause infections are transmitted via blood, the lancet of a puncture device is usually disposed of disposable. Therefore, at the time of disposal, the used lancet must be removed by removing the cap from the puncture device body.
However, when the lancet user pulls out the lancet from the main body, there is a risk that the fingertip of the used lancet will poke.
In addition, if the lancet needle is exposed and discarded, there is a possibility that a waste supplier accidentally pierces the skin with the lancet needle.
Therefore, in general, the used lancet needle is again covered with a resin cover that protects the lancet needle when not in use, and the lancet is safely removed from the main body and discarded.

However, when the user of the lancet tries to put the resin cover on the tip of the needle, there arises a new problem that the fingertip sticks with the needle. In particular, lancet users often have blindness due to diabetic complications, and the frequency of lancet needlepoints is high.
In addition, there are few problems when the same person uses a single puncture device continuously, but multiple people may use a single puncture device, so when attaching the resin cover to the needle, There was a high possibility that blood would adhere, and there was a risk of infection via the blood.

Accordingly, there is provided a puncture device cap that can be discarded without touching the used lancet by pressing the lancet after use with the cap of the puncture device, fixing the lancet to the cap, and removing the cap from the main body (for example, , See Patent Document 1).
This allows the user to bring the used lancet sandwiched between the caps to the top of the trash can with the cap, release the cap and drop the lancet into the trash can for disposal. It has become possible to prevent accidents.
In addition, the risk of infection caused by blood adhering to the puncture device body can be eliminated.

JP 2000-175889 A (first page, FIG. 4)

However, even if the user can discard the lancet without directly contacting the used lancet, the needle of the lancet discarded in the trash can or the like remains exposed.
Further, even if the lancet needle is discarded with a resin cover, the cover may come off and the needle may be exposed.
For this reason, there is a possibility that a waste trader who handles the lancet may accidentally pierce the skin with the needle tip. In particular, since blood adheres and remains on the surface of the lancet or needle, there is a high possibility of causing infection due to a false puncture.

  The present invention has been proposed in order to solve the above-described problems of the prior art, and the user of the puncture device can safely and easily remove the used lancet from the main body and discard it. An object of the present invention is to provide a cap for a puncture device that can handle a lancet that is safely discarded.

  In order to achieve the above object, a puncture device according to claim 1 of the present invention includes a main body having an elastic body for momentarily projecting a needle for puncturing the skin, and the needle attached to the main body. And a cap for covering the lancet, wherein the lancet has a groove, the cap has an opening, and is pressed. Thus, the structure has a pushing member that immerses into the cap from the opening and engages with the groove of the lancet.

The puncture device having such a configuration can be easily pressed because the pushing member is formed on the cap, and the pushing member is immersed inside the cap by the pushing of the pushing member. The lancet can be engaged and both can be fixed.
As a result, even if the user brings the used lancet sandwiched between the caps to the top of the trash box together with the cap, the lancet and the cap are not separated even if the pressing of the cap is released there. Therefore, it is possible to prevent an accident in which the needle skin is pierced by a lancet directly disposed in a trash can or the like.

The puncture device according to claim 2 of the present invention is such that when the pushing member is provided so as to protrude outward from the cap and the pushing member is pressed, a part of the pushing member is engaged with a part of the opening of the cap. It is configured to stop and hold the engagement state of the locking portion to the lancet.
With such a configuration, even after the pressing is released, the locking portion does not return to the original state before the pressing.
Thereby, since the cap for puncture tools and a lancet are not separated, the lancet can be safely processed even after the lancet is discarded.

The puncture device according to claim 3 of the present invention has a configuration in which the push-in member is provided in a state where the lower part is coupled to the opening formed in the cap and is longer than the opening. ing.
With such a configuration, once the pushing member is pressed and the pushing member is once pushed into the cap, the pushed pushing member does not return to the outside of the cap and can maintain engagement with the lancet.

The puncture device according to claim 4 of the present invention is provided with an engaging portion that engages with the groove of the lancet at the projecting end of the pushing member, and the head of the engaging portion is inclined inward and downward of the cap. It is the structure which formed the inclination part.
With such a configuration, when the push-in member is pressed, the push-in member easily immerses into the cap from the opening along the inclined portion in the head portion of the locking portion, and once it is immersed, Does not come off the opening. Further, the locking portion is securely engaged with the groove of the lancet.

The puncture device according to claim 5 of the present invention is configured such that the lancet is rotatable with respect to the main body.
With such a configuration, when the pushing member is pressed, the locking portion is engaged with the groove by rotating the lancet regardless of the positional relationship between the locking portion and the lancet.

The puncture device according to claim 6 of the present invention has a configuration in which the locking portions are arranged at two substantially opposite positions.
With such a configuration, it is possible to easily immerse the inside of the cap by pressing the pressing member with a finger, and to engage the locking portion at a position facing the lancet. Here, “substantially facing” means including both the case of facing 180 degrees and the case of facing slightly shifted from 180 degrees. In addition, when it has shifted | deviated slightly from 180 degree | times and opposed, the latching | locking part engages in the groove | channel of the said lancet by pushing and rotating the guide rib of the said lancet reliably.

The puncture device according to claim 7 of the present invention has a configuration in which a plurality of push-in protrusions are provided on at least one of the push-in members toward the center of the cap.
With such a configuration, the pushing protrusion attached to the inside of the pushing member pushes the guide rib of the lancet and securely engages the groove of the lancet while rotating the lancet.

The puncture device according to claim 8 of the present invention is configured such that the angle toward the center of the two pushing protrusions provided on the pushing member is smaller than the angle toward the center of the adjacent rib of the lancet.
With such a configuration, the two pushing projections are positioned between the guide ribs of the lancet, and the cap and the lancet can be securely fixed and separated from the main body.

The puncture device according to claim 9 of the present invention is configured such that the cap body is rectangular.
With such a configuration, the cap body portion is difficult to roll, and thus handling is easy. Further, since the shape is simplified, molding becomes easy.

As described above, according to the puncture device of the present invention, the pressing member is provided on the outer side of the cap before pressing, so that the pressing member can be easily pressed, and the pressing member can be simply pressed by pressing the pressing member. Since the engaging portion of the squeezed member enters the groove of the lancet, the pushing member and the lancet are easily engaged. And since the pushing member pressed once hold | maintains an engagement state with a lancet, when pulling out the cap for puncture tools from a main body, both are united and isolate | separated from a main body.
This makes it possible to discard the lancet simply by removing the cap from the main body without contacting the lancet.

Further, even after disposal, the lancet can be securely held in the cap, and the lancet can be prevented from being detached from the cap.
Thereby, the user of the puncture device can not only directly dispose of the lancet without directly contacting the used lancet, but also prevent the lancet needle from being exposed after the disposal.

Hereinafter, preferred embodiments of the puncture device according to the present invention will be described with reference to FIGS.
FIG. 1 shows a main body, a lancet, and a cap of a puncture device according to the present invention, (a) is an exploded side view of the entire puncture device, and (b) is an enlarged side view of a state where the lancet is fixed to the main body. FIG. 4C is an enlarged side view in which a part of the cap is cut in cross section.
A main body 10 of the puncture device includes a main body holder 11, a main body head 12, and a main body trunk portion 13. A cylinder 14 into which the lancet 20 is inserted projects from the tip of the main body head 12, and a firing button 15 is attached to the main body head 12 to release the bias of the spring inside the main body. Yes.
The cylinder 14 for inserting the lancet 20 is rotatable with respect to the main body holder 11 and is movable in the axial direction with respect to the main body head 12.

  A needle 21 is attached to the tip of the lancet 20. A plurality of (four in this embodiment) ribs 22 are formed in the circumferential axis direction, and grooves 24 are formed between the ribs 22, respectively. Flange 23 is formed at both axial ends of lancet 20, and both ends of groove 24 are closed.

The cap 30 is made of a flexible material such as resin, and is provided with a pushing member 31. The push-in member 31 is formed in two openings 37 formed at opposite portions of the side surface of the cap 30 with the lower part coupled to the cap 31. The locking portion 32 of the push-in member 31 is slightly taller than the cap opening 37 and is formed to be inclined downward toward the inside of the cap. One pushing member 31 is provided with a locking portion 32 and a tip protruding portion 32a at the center upper end, and the other pushing member 31 is provided with a locking portion 32 and is slightly shifted from the center upper end. A tip protrusion 32a is provided.
The opening 37 and the pushing member 31 formed in the cap 30 may be one or more than three.

An opening 36 is provided at the tip of the cap head 34 for projecting a lancet needle. On the other hand, the cap body 35 is opened in a cylindrical shape so as to be coupled to the main body holder 11.
The cap 30 is made of a transparent or translucent material. Therefore, the appearance of the lancet 20 and the main body cylinder 14 mounted in the cap 30 can be seen.
When the cap is configured as described above, since there is no undercut portion that protrudes greatly in the radial direction of the cap, the cap can be manufactured by integral molding, and the cost can be reduced.

A method of using the puncture device according to the present embodiment will be described with reference to FIG.
First, the lancet 20 is attached to the cylinder 14 at the tip of the main body holder 11. Since the lancet when not in use is covered with a resin cover for protecting the needle, the lancet 20 is attached to the cylinder 14, and then the resin cover is removed from the lancet 20 to expose the needle 21. The cap 30 is put on the main body holder 11 on which the lancet 20 is set, and the cap 30 and the main body 10 are coupled.

Next, when the main body head 12 is held with one hand and the main body body portion 13 is pulled with the other hand, the spring inside the main body body portion is urged and the cylinder 14 is drawn into the holder, and the launch button 15 is locked.
In this state, when the cap head 34 is applied to the skin and the firing button 15 of the puncture tool is pressed, the bias of the spring inside the main body is released, and the lancet 20 is ejected vigorously toward the tip of the cap.
The needle 21 protrudes momentarily from the opening 36 at the tip of the cap by a slight length, and punctures the skin. The tip of the lancet 20 collides with the cap head 34, and the lancet needle 21 returns to the inside of the cap again by the reaction and the pullback force of the spring.

  Next, the pushing member 31 is pressed. When the pushing member 31 is pressed, the coupling portion of the cap is bent. At that time, the locking portion 32 attached to the distal end portion of the push-in member 31 is also pressed at the same time, and enters the cap from the opening 37 of the cap head portion 34. Since the pushing member 31 that has entered the opening 37 from the cap head 34 is taller than the opening 37, the rear edge of the tip part abuts on the inner upper edge of the opening 37, and the cap does not return to the outside.

Since the lancet 20 is mounted on the cylinder 14 of the main body inside the cap, when the push-in member 31 is pressed, the tip protrusions 32a of the locking portions 32 are formed by a plurality of ribs 22 provided on the lancet. The groove 24 is engaged. When the cap 30 is pulled out from the main body 10 in a state where these are engaged with the groove 24 of the lancet 20, the tip protrusion 32 a moves the cap 30 until it contacts the flange 23 of the lancet 20. When the tip protrusion 32 a hits the flange 23, the lancet 20 is separated from the main body 10 together with the cap 30.
In addition, it is preferable that the length of the cap head is set such that the lancet needle 21 does not protrude from the cap opening 37 in a state where the tip protrusion 32 a is in contact with the flange 23.

As described above, the lancet 20 that has punctured the skin is fixed to the cap 10 by pressing the pushing member 31 of the cap, and can be removed from the main body without touching the lancet by pulling the cap 30 out of the main body 10 as it is. it can.
Furthermore, since the extracted lancet 20 is fixed to the cap 30, the lancet needle 21 is not exposed from the cap 30 and can be safely treated as a used lancet.

The puncture device according to the present invention will be described in detail with reference to FIGS. 2 and 3 until the lancet is attached to the main body, the needle is punctured into the skin, and the lancet is removed from the main body together with the cap.
FIGS. 2A and 2B are cross-sectional views of the main body holder 17 and the cylinder 14, lancet 20, and cap 30 attached thereto.

FIG. 2 shows a state after the lancet 20 is mounted on the cylinder 14 of the main body and the cap 30 is put on, before the elastic body of the main body is pulled and the needle 21 of the lancet is punctured.
(A) is a state before mounting the lancet 20 to the cylinder 14 of the main body. A needle 21 for puncturing the skin is attached to the tip of the lancet 6.
(B) is a state where the cap 30 is attached to the main body holder 11 so as to cover the lancet 20. The cap 30 is attached to the main body holder 11 after the lancet 20 is attached to the cylinder 14.
(C) is a state where the lancet 20 is mounted on the cylinder 14 of the main body and the lancet 20 is covered with the cap 30.
Since the lancet needle 21 is also stored in the cap 30, the user of the lancet 20 can safely handle the puncture device.
(D) is a state in which an urging force is applied by pulling an elastic body such as a spring inside the main body in order to puncture the skin with the lancet needle 21. The structure for applying an urging force to the lancet 20 is the same as that of a known puncture device.

FIG. 3 shows a state from when the urging force of the elastic body of the main body is released and the needle 21 is punctured into the skin and until the used lancet 20 is separated from the main body 10 together with the cap 30.
(A) is a state in which the urging force of the elastic body is released by pressing a firing button provided in the main body, and the needle of the lancet 6 protrudes from the tip of the puncture tool cap 1 to puncture the skin. .
When the urging force of the elastic body is released, the elastic body expands vigorously to restore and pushes the lancet 20 to the tip of the cap 30. Since the opening 34 is provided in the center of the tip of the cap 1, the lancet needle 21 protrudes from the tip of the cap 30.
The state shown in (a) is instantaneous. The lancet 20 returns to the inside of the cap 30 due to the reaction that collides with the surface of the cap 30 having the opening and the pullback force of the spring, so that the lancet needle 21 also returns to the inside of the cap 10. Moreover, in the same figure, in order to clarify the state in which the needle protrudes, the protrusion amount of the needle is made larger than the actual amount.

(B) is a state in which the lancet needle 21 returns to the inside of the cap 30 after puncturing the skin.
Since the lancet 20 and the lancet needle 21 adhere to blood, they are usually disposable for prevention of infection. However, when removing the cap from the main body and removing the lancet 20 directly from the main body 10, there is a risk of piercing the skin with the needle 21 of the used lancet. Therefore, the lancet 20 is accommodated in the cap 30 in order to discard the lancet 20 with the cap 30 covered without directly contacting the used lancet 20.

(C) is a state where the pushing member 31 of the cap 30 is pressed and the locking portion 32 is engaged with the lancet 20.
As shown in FIGS. 2 and 3, two pushing members 31 are attached to the cap 30. The push-in member 31 is formed outside the cap 30 so as not to interfere with the puncturing operation by the movement of the lancet 20. After the lancet 20 is punctured into the skin and the lancet 20 returns to the cap 10, the pushing member 31 is pressed to engage and fix the lancet 20 and the locking portion 32.
The push-in member 31 is disposed outside the cap and is slightly taller than the opening so that the locking portion 32 at the tip does not enter the inside of the cap 30 during the puncturing operation. . Therefore, in order to press, the force by a fingertip is needed to some extent. However, the protruding end of the push-in member 31 is inclined so as to easily enter the inside of the cap 30, and the cap is formed of resin and has elasticity, so that the locking portion 32 is held by the lancet 20 with a slight pressing force. Can be moored with.

(D) has shown the state which took out from the main body 10, after engaging the lancet 20 and the cap 30. FIG.
When the cap 30 is pulled, the engaging portion engages with the flange 23 of the lancet. Thereby, the lancet 20 is completely fixed to the cap 30 and the direction in which the cap is pulled out. When the cap 30 is pulled out, the lancet 20 is also separated from the main body simultaneously with the cap 30.
Conventionally, if the lancet needle 21 is exposed and discarded, there is a risk that a waste supplier accidentally stabs a finger or the like with the lancet needle 21. However, since the lancet needle 21 is covered with the cap 30 and can be discarded, it is possible to prevent accidents caused by erroneous use of the lancet needle 21 after use.

As described above, the cap 30 and the lancet 20 can be fixed by pressing the pushing member 31 of the cap 30 from the use state of the puncture device shown in FIGS.
Thereby, the user of the puncture device can discard the lancet 20 without touching the lancet 20. Further, after disposal, the lancet 20 and the cap 30 are fixed, and the lancet needle 21 is not exposed, so that the lancet can be safely processed.

4A is a view of the cap 30 as viewed from the tip side, FIG. 4B is a view showing a cross section AA of FIG. 1C, and FIG. 4C is a lancet 20 and the cap. It is sectional drawing which shows the relationship of 30.
The tip of the cap locking portion 32 and the tip protrusion 32a are formed in an arc shape. Moreover, the front-end | tip protrusion part 32a of the latching | locking part 32 with which the cap 30 was equipped in the state which opposes is not attached in the direction of just 180 degree | times, but is attached slightly shifted.
On the other hand, as shown in FIG. 4C, since there are four ribs 22 of the lancet 20, the angle from the tip of each rib toward the center of the rib is 90 degrees. Therefore, when the pushing member 31 is pressed to engage the cap 30 and the lancet 20, the tip of the locking portion 32 or the tip protrusion 32a of the locking portion just contacts the tip of the rib 22 of the lancet. Even if it exists, the other front-end | tip protrusion part 32a or the front-end | tip of the latching | locking part 32 does not contact | abut to the rib 22. FIG. Accordingly, the locking portion 32 or the tip protruding portion 32a that has not contacted the tip of the rib presses the side surface of the rib 22 to rotate the lancet, so that the lancet and the locking portion 32 can be securely engaged. become.
In addition, when the tip protrusion 32a is disposed so as to face 180 degrees, even if the tip of the rib 22 and the tip protrusion 32a come into contact with each other, the tip protrusion 32a of the rib 22 is caused by the slipperiness of the resin. Although the rib 22 is pushed by sliding to the side portion side and the lancet is rotated, the lancet can be reliably rotated by shifting the tip protrusion 32a slightly from 180 degrees as described above.

FIG. 5A is a perspective view of the cap 30 and the holder 11 corresponding to the cap 30 when the cap body portion 35 is formed in a rectangular shape, and two opposite sides thereof are used as the push-in member 31. b) is a plan view thereof.
As shown in FIG. 5A, by processing the cap body into a rectangular shape, the cap 30 is less likely to roll, and thus is easier to handle than those processed into a cylindrical shape. Further, the length of the push-in member 31 is extended to the cap body portion 35 than in the case of the above-described embodiment, and the width of the push-in member 31 is further widened so that the area of the push-in member is increased and the push-in member 31 is pressed. The shape is easy to do. Furthermore, since the shape is simplified, the cost can be reduced by simplifying the mold and reducing the material.

Further, by adopting a structure in which the cap body 35 is inserted into the holder 11, the holder 11 does not hinder the pressing member 31 from being pressed. That is, the cap 30 is fitted into the inside of the holder 11 to fix them. At that time, a part of the pushing member 31 is also inserted inside the holder 11, and the pushing member 31 is fixed inside the holder 11.
Therefore, the holder 11 does not interfere with the pushing member 31 when the pushing member 31 is pressed to engage the cap 30 and the lancet 20 after using the puncture device.
The position of the locking portion, the tip shape, the relationship between the lancet and the cylinder, and the like are the same as those in the first embodiment.

FIG. 6 illustrates a pattern different from that of the above-described embodiment with respect to the locking portion 32 and the pressing protrusion 33 attached to the pressing member 31 of the cap 30.
The cap 30 in FIG. 6A has a pushing protrusion 33 attached to one side of the pushing member 31 and a locking portion 32 attached to the other side. The cap 30 in FIG. 6B has a locking portion 32 and a pressing projection 33 attached to one side of the pressing member 31 and a locking portion 32 attached to the other side. FIG. 3 is a cross-sectional view of the cap 30 and the lancet 20.

The operation of the lancet 20 when the pushing member 31 of the cap 30 is pressed will be described.
FIG. 6A shows a case where the upper two push-in protrusions 33 are just at positions facing the valleys of the lancet 20.
Since there are four ribs 22 in the lancet 20, the angle from the tip of each rib toward the center of the rib is 90 degrees. On the other hand, the angle toward the center of the rib 22 of the pushing protrusion 33 is smaller than 90 degrees. As a result, the two pushing protrusions 33 are inserted into the groove 24 of the rib, and the pushing protrusion 33 can rotate and fix the lancet 20 without the locking portion 32.

Further, the two pushing projections 33 are attached while being shifted in angle toward the center from the locking portion 32 (the angle α is different from the angle β). In this way, when the pushing member 31 of the cap is pushed, the pushing protrusion 33 (the pushing protrusion 33 on the right side in the figure) having a large angle toward the center from the locking portion 32 first contacts the rib 22 of the lancet. . The pushing protrusion 33 that has come into contact slightly rotates the lancet 20, and then the pushing protrusion 33 (the pushing protrusion 33 on the left side in the drawing) having a small angle toward the center from the locking portion 32 contacts the rib 22.
The angles of the two pushing protrusions 33 from the locking portion 32 may be the same, but when the angle toward the center from the locking portion 32 is shifted as described above, the lancet 20 is more reliably connected. The locking part 32 can be engaged.

  The pushing protrusion 33 is formed in a wedge shape or a shape with a flat tip near the wedge shape so as to be easily engaged with the groove 24 of the lancet. The pushing protrusion 33 may be provided on both pushing members 31. In this way, the lancet 20 can be engaged more quickly and reliably.

FIG. 6B shows a case where the rib 22 of the lancet is just in contact with the locking portion 32 on one side.
In this case, as described above, the locking portions 32 provided in pairs with the cap 30 are not attached in the opposite direction of 180 degrees, but are attached with a slight shift, so that one locking portion 32 is Even when it just contacts the tip of the rib 22 of the lancet, the other locking portion 32 does not contact the tip of the rib 22. Accordingly, when the locking portion 32 that has not contacted the tip of the other rib presses the side surface of the rib 22 of the lancet, the lancet rotates, and the two locking portions 32 of the cap and the lancet 20 are engaged.
The lancet 20 rotates in the clockwise direction when the other side locking portion 32 presses the rib 22. Since the locking portion 32 is larger than the pushing protrusion 33, the rib 22 of the lancet gets over the pushing protrusion 33, and the two locking portions 32 of the cap and the lancet 20 are engaged.

As mentioned above, although the preferable embodiment was shown and demonstrated about the apparatus of this invention, the apparatus which concerns on this invention is not limited only to embodiment mentioned above, A various change implementation is possible in the scope of the present invention. Needless to say.
For example, the number of pushing members 31 attached to the cap 30 is not limited to two, and may be one, or may be three or more. This is because the lancet 20 and the pushing member 31 need only be engaged.
Moreover, the pushing protrusion 33 attached to the pushing member 31 is not restricted to one or two pieces, Three or more may be sufficient.

  In the present invention, when testing for diabetes or other diseases, the user of the puncture device can safely and easily remove the used lancet from the main body and dispose of the lancet, and the processing company or the like can safely handle the discarded lancet. be able to.

It is the side view of the main body, the lancet, and the cap which comprise the puncture device which concerns on this invention, and sectional drawing of a cap. It is sectional drawing of the cap, lancet, and main body holder which comprise the puncture device based on this invention, and shows the state after mounting | wearing a main body holder and before the launch of a lancet. It is sectional drawing of the cap, lancet, and main body holder which comprise the puncture device which concerns on this invention, and shows the state until it isolate | separates from a main body with the cap for puncture devices immediately after the launch of a lancet. It is the schematic of the cap front direction which comprises the puncture device which concerns on this invention, sectional drawing, and sectional drawing which shows the relationship between a lancet and a cap. It is the perspective view and top view of the cap and holder of a puncture device which concern on another Example of this invention. It is sectional drawing which shows the relationship between the cap and lancet of the puncture device which concerns on another Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Puncture tool main body 12 Holder 13 Main body head 14 Cylinder 15 Launch button 20 Lancet 21 Needle 22 Rib 23 Flange 24 Groove 30 Cap 31 Pushing part 32 Locking part 32a Tip protrusion part 33 Pushing protrusion 34 Cap head part 35 Cap trunk part 36 Opening 37 Opening

Claims (9)

A main body having an elastic body for momentarily projecting a needle for puncturing the skin, a lancet having the needle attached to the main body, and a cap attached to the main body and covering the lancet A puncture device provided,
The lancet has a groove;
A puncture device, wherein the cap has an opening, and has a push-in member that immerses into the cap from the opening and engages with a groove of the lancet when pressed. The push-in member protrudes outside the cap;
When the pressing member is pressed, a part of the pressing member is locked to a part of the opening of the cap, and the engagement state of the locking portion to the lancet is maintained.
The puncture device according to claim 1.   The puncture device according to claim 1 or 2, wherein the push-in member is provided in a state in which a lower portion is coupled to an opening formed in the cap, and is longer than the opening.   A locking portion that engages with a groove of the lancet is provided at a protruding end of the pushing member, and an inclined portion that is inclined inward and downward of the cap is formed at the head of the locking portion. The puncture device described.   The puncture device according to any one of claims 1 to 4, wherein the lancet is rotatable with respect to the main body.   The puncture device according to any one of claims 1 to 5, wherein the locking portions are arranged at two substantially opposite positions.   The puncture device according to any one of claims 1 to 6, wherein a plurality of pushing protrusions are provided on at least one of the pushing members toward the center of the cap.   The puncture device according to any one of claims 1 to 7, wherein an angle toward the center of two pressing protrusions provided on the pressing member is smaller than an angle toward the center of adjacent ribs of the lancet.   The puncture device according to any one of claims 1 to 8, wherein the cap body is rectangular.

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