CN111166349B

CN111166349B - Blood sampler

Info

Publication number: CN111166349B
Application number: CN201811337427.5A
Authority: CN
Inventors: 张立波
Original assignee: Tianjin Huahong Technology Co Ltd
Current assignee: Tianjin Huahong Technology Co Ltd
Priority date: 2018-11-12
Filing date: 2018-11-12
Publication date: 2022-09-06
Anticipated expiration: 2038-11-12
Also published as: CN111166349A

Abstract

The invention relates to a hemostix, comprising a shell for defining a containing cavity, wherein the shell is provided with a first opening and a second opening; the cutter holder is pivotally arranged in the accommodating cavity, and a blade is arranged on the cutter holder and is suitable for being exposed out of the shell through the first opening when the cutter holder pivots; a spring disposed in the receiving cavity, one end of the spring being fixed to the housing and the other end of the spring being connected to the holder to provide an elastic force for pivoting the holder; and the abutting end of the trigger part is positioned in the accommodating space, the operating end of the trigger part extends out of the shell from the second opening, the abutting end is suitable for abutting against the tool holder to prevent the tool holder from pivoting, and the trigger part is suitable for being separated from the tool holder based on the stress of the operating end of the trigger part. The tool apron is provided with a first bulge and a second bulge; and the shell is provided with a first guide groove and a second guide part, the first guide groove is matched with the first protrusion, the extending direction of the first guide groove is consistent with the cutter discharging direction, and the second guide part is matched with the second protrusion to guide the second protrusion to enter the first guide groove when the cutter holder pivots.

Description

Blood sampler

Technical Field

The invention relates to the field of medical instruments, in particular to a blood sampler.

Background

The existing blood sampling device generally comprises a shell forming an accommodating space; a tool holder pivotally disposed within the receiving cavity, the tool holder having a blade disposed thereon, the blade adapted to be exposed to the exterior of the housing when the tool holder is pivoted; a spring disposed in the accommodating cavity to provide an elastic force for pivoting the tool holder; and the abutting end of the trigger part is positioned in the accommodating space, the operating end of the trigger part extends out of the shell from the second opening, and the cutter holder pivots under the elastic force of the spring based on the stress of the operating end of the trigger part, so that the blade is exposed out of the shell.

In the above solution, the tool holder has a pivot center, and the blade is exposed out of the housing in a circular arc-shaped motion track based on the pivot of the tool holder. However, in the case of a blade having the same length as that of the exposed housing, the size of the lancet edge on the skin of the patient is large because of the circular arc trajectory of the blade tip.

Disclosure of Invention

In order to alleviate or solve the above problems, the present invention provides a blood collection device, especially a foot blood collection device.

According to an embodiment of the present invention, a blood collection device includes:

the shell is internally provided with a containing cavity and is provided with a first opening and a second opening;

a tool holder pivotally disposed in the accommodating cavity, the tool holder having a blade disposed thereon, the blade being adapted to be exposed to the outside of the housing through the first opening when the tool holder is pivoted;

a spring disposed in the receiving cavity, one end of the spring being fixed to the housing and the other end of the spring being connected to the holder to provide an elastic force for pivoting the holder; and

the abutting end of the trigger part is positioned in the accommodating space, the operating end of the trigger part extends out of the shell from the second opening, the abutting end of the trigger part is suitable for preventing the tool holder from pivoting, and the abutting end of the trigger part is suitable for allowing the tool holder to pivot based on the stress of the operating end of the trigger part,

wherein:

the cutter holder is provided with a first bulge and a second bulge; and is

The shell is provided with a first guide groove and a second guide part, the first guide groove is matched with the first protrusion, the extending direction of the first guide groove is approximately consistent with the cutter discharging direction, and the second guide part is matched with the second protrusion to guide the second protrusion to enter the first guide groove when the spring drives the cutter holder to pivot.

In the technical scheme of the invention, based on the facts that the first guide groove is matched with the first protrusion and the extending direction is generally consistent with the cutter discharging direction, the second guide part is matched with the second protrusion to guide the second protrusion to enter the first guide groove when the cutter holder is driven by the spring to pivot, and the cutter holder stops pivoting movement after the second protrusion reaches the first guide groove, the situation that the skin is continuously scratched after the deepest cutter edge is obtained does not exist, and the size of the blood sampling cutter edge is reduced.

Optionally, the abutting end of the trigger portion is adapted to abut the tool holder to prevent the tool holder from pivoting, and the abutting end of the trigger portion is adapted to disengage from the tool holder based on a force applied to the operating end of the trigger portion.

Optionally, the first guide slot has a first end close to the first opening and a second end far away from the first opening; the second guide part is connected between the first end and the second end of the first guide groove; and the spring is adapted to drive the holder further towards the second end of the first guide slot.

Further optionally, the second guide portion has an arc-shaped abutting surface with the first protrusion as a center. Further optionally, the second guide portion is a second guide slot, and the second guide slot has a first end far away from the first guide slot and a second end communicated with the first guide slot; under the condition that the abutting end of the trigger part abuts against the tool apron, the first protrusion can pivotally abut against the first end of the first guide groove, and the second protrusion can pivotally abut against the first end of the second guide groove.

Optionally, one end of the tool apron close to the second protrusion is provided with an abutting surface and an avoiding surface which are located on two sides, and the abutting end of the triggering portion is suitable for abutting against the abutting surface.

Optionally, one end of the tool apron close to the second protrusion is provided with a first stepped portion, and a vertical surface of the first stepped portion, which is parallel to the thickness direction of the tool apron, forms a first abutting surface; the abutting end of the triggering part extends to cover the blocking matching surface of the first step part, which is perpendicular to the thickness direction of the tool apron, and is provided with a second abutting surface which is suitable for abutting against the first abutting surface to prevent the tool apron from pivoting. Further optionally, the abutting end of the trigger portion has a second step portion, a vertical surface of the second step portion parallel to the thickness direction of the abutting end of the trigger portion constitutes the second abutting surface, and a surface of the second step portion perpendicular to the thickness direction of the abutting end of the trigger portion extends to cover the blocking matching surface.

Alternatively, the trigger portion is pivotable based on a pivot shaft disposed between both ends of the trigger portion. Further optionally, the spring is an extension spring providing tension, and one end of the spring is fixed on a spring post in the housing. Still further optionally, the operating end of trigger part is provided with supplementary block portion, supplementary block portion has the extension that extends to in the second opening, and sets up block arch on the extension, block protruding being suitable for the butt the spring post, and based on the operating end atress of trigger part, block protruding being suitable for to overturn the spring post.

Optionally, the housing further comprises a third opening having a shape of a "convex", the third opening having a small-width portion and a large-width portion; the blood collector also comprises a safety part, one end of the safety part is connected to the trigger part in the accommodating space, and the other end of the safety part extends out of the shell from the third opening; and the other end of the safety part is provided with an expanded width part, the width of the expanded width part is larger than that of the small width part, and the expanded width part is suitable for moving from the large width part to the accommodating space.

Optionally, the housing comprises a first housing part and a second housing part, and the two housing parts define the accommodating space; the tool holder is arranged on the first shell part, the second shell part is provided with a limiting part protruding towards the first shell part, and the limiting part is suitable for limiting the moving distance of the tool holder in the thickness direction of the tool holder under the condition that the first shell part and the second shell part are assembled together.

Drawings

FIG. 1 is a perspective view of a blood collection set according to an exemplary embodiment of the present invention;

FIG. 2 is a top view of the blood collection set of FIG. 1;

FIG. 3 is a schematic view of the device of FIG. 2 with the upper housing removed;

FIG. 4 is a perspective view of the hemostix of FIG. 1 with the upper housing removed showing the blade holder, trigger and safety;

FIG. 5 is a schematic view of the lower housing of the blood collection set of FIG. 3;

FIG. 6 is a cross-sectional view of the hemostix of FIG. 1 showing the first and second projections on the blade holder;

FIG. 7 is a perspective view of a tool holder according to an exemplary embodiment of the invention;

fig. 8 is a perspective view of an upper case of the blood collecting device according to an exemplary embodiment of the present invention, in which a stopper portion for limiting a moving distance of a holder in a thickness direction of the blood collecting device is shown;

fig. 9 is a partially cut-away perspective view of the hemostix according to an exemplary embodiment of the present invention, wherein the relative positions of the position-limiting portion and the knife holder are shown;

FIG. 10 is a schematic view of the safety portion of the blood collection device of FIG. 1 with the operating end depressed;

FIG. 11 is a top view of the hemostix of FIG. 10 with the upper housing removed and the abutting end of the trigger contacting or abutting the abutting surface of the blade holder;

FIG. 12 is a view exemplarily showing a state where the operating end of the trigger portion is pressed by a distance such that the abutting end of the trigger portion is about to be released from the contact with the abutting surface of the tool holder;

FIG. 13 illustrates a condition in which the blade is drawn from the first opening of the housing after the abutting end of the trigger portion is disengaged from the tool holder, wherein the blade is in a vertical position;

fig. 14 exemplarily shows a state where the blade is retracted into the housing after the blood collecting operation is completed.

Detailed Description

The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings. In the specification, the same or similar reference numerals denote the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the general inventive concept of the present invention and should not be construed as limiting the invention.

A blood sampler according to the present invention is described below with reference to fig. 1-14. As shown, an exemplary blood sampler according to the present invention includes:

a housing 10 in which a housing cavity S (see, for example, fig. 9) is formed, the housing 10 having a first opening 11 and a second opening 12, see fig. 1 and 4;

a holder 20, see fig. 3, pivotably arranged in the receiving cavity S, the holder 20 being provided with an insert 21, the insert 21 being adapted to be exposed out of the housing 10 via the first opening 11 when the holder is pivoted, see for example fig. 11-13;

a spring 30, see for example fig. 3, disposed in said housing cavity S, one end of the spring 30 being fixed to the housing 10 and the other end of the spring 30 being connected to the holder 20 to provide a spring force for pivoting the holder; and

the trigger part 40, for example, see fig. 3, the abutting end 41 of the trigger part 40 is located in the accommodating space S, the operating end 42 of the trigger part 40 extends out of the housing 10 from the second opening 12, the abutting end 41 of the trigger part is adapted to abut against the tool holder 20 to prevent the tool holder from pivoting, and based on the force applied to the operating end 42 of the trigger part, the abutting end 41 of the trigger part is adapted to disengage from the tool holder 20,

wherein:

the tool holder 20 is provided with a first protrusion 22 and a second protrusion 23, see fig. 6 and 7; and is

The housing 10 is provided with a first guide groove 13 and a second guide part 14, for example, see fig. 3, 5 and 6, the first guide groove 13 cooperates with the first protrusion 22 and extends in a direction substantially corresponding to the tool-out direction, and the second guide part 14 cooperates with the second protrusion 23 to guide the second protrusion 23 into the first guide groove 13 when the spring 30 drives the tool holder 20 to pivot.

In the present invention, the direction of the blade out refers to the direction in which the blade extends when the blade is at the position of maximum depth of penetration into the skin of the patient, for example, the direction in which the blade 21 extends in fig. 13. Since the first guide groove 13 is engaged with the first protrusion 22 and the extending direction is substantially the same as the knife-out direction, after the second protrusion 23 enters the first guide groove 13 from the second guide portion 14, the blade 21 is in the knife-out direction and does not move further in an arc, for example, further to the left in fig. 13, so that the size of the blood collection knife edge can be effectively reduced with the same puncture depth.

In the present invention, the guide groove may be a concave groove formed in the housing wall, or may be a groove formed by a rib provided on the housing wall.

In the present invention, although in the illustrated example the spring powers the pivoting of the holder, other elastic elements are also covered by the spring of the present invention, and are within the scope of the present invention.

It should also be noted that in the illustrated embodiment, the spring is an extension spring, but the spring may also be a compression spring that urges one end of the holder to pivot. This is also within the scope of the invention. The tool holder 20 is provided with a spring-coupled member, shown in fig. 7 as a cylinder 20A.

It should be noted that although in the illustrated example the abutment end of the trigger portion is adapted to abut against the tool holder to prevent the tool holder from pivoting, and the abutment end of the trigger portion is adapted to disengage from the tool holder upon application of a force to the operating end of the trigger portion, the abutment end may not directly abut against the tool holder but influence the pivoting of the tool holder by other means, i.e.: the abutment end of the trigger portion is adapted to prevent the tool holder from pivoting, and the abutment end of the trigger portion is adapted to allow the tool holder to pivot based on a force applied to the operating end of the trigger portion. All of which are within the scope of the present invention.

As shown, the trigger 40 may pivot about a pivot axis 40A.

In the present invention, the pivot resistance of the tool holder is released by pressing the operation end 42 of the trigger portion downward, but although not shown, as will be apparent to those skilled in the art, the pivot resistance of the tool holder may be released by pulling the operation end upward, which is within the scope of the present invention.

The fitting between the first projection 22 and the second projection 23 and the first guide groove 13 and the second guide groove 14 will be further exemplified below.

As shown in fig. 5, the first guide groove 13 has a first end close to the first opening 11 and a second end far from the first opening 11; the second guide portion 14 is connected between the first end and the second end of the first guide groove 13; and the spring 30 is adapted to drive the holder 20 further towards the second end of the first guide slot.

Although in the illustrated embodiment, the second guide portion 14 is in the form of a guide groove, as can be appreciated by those skilled in the art, the second guide portion 14 may also be an arc surface that limits the movement trajectory of the second protrusion 23, for example, the second guide portion 14 has an arc-shaped abutment surface centered on the first protrusion 22.

As shown in fig. 5, the second guide portion 14 is a second guide groove, and the second guide groove 14 has a first end far from the first guide groove 13 and a second end communicated with the first guide groove 13; with the abutment end 41 of the trigger portion abutting the tool holder 20, the first protrusion 22 pivotably abuts a first end of the first guide groove 13, and the second protrusion 23 pivotably abuts a first end of the second guide groove 14, as shown in fig. 6.

The following describes, by way of example, how the abutment end 41 of the trigger abuts the tool holder 20 to limit pivoting of the tool holder.

As shown in fig. 3, 7 and 11, one end of the tool holder 20 close to the second protrusion 23 has an abutment surface 24 and a relief surface 25 on both sides, and an abutment end 41 of the trigger portion is adapted to abut against the abutment surface 24. As shown in fig. 12, when the tool holder 20 in fig. 12 is further pivoted, the end of the tool holder 20 does not interfere with the abutment end 41 because of the existence of the relief surface 25.

It should be noted that the contact surface 24 may be one surface or two surfaces having a step structure, for example, as shown in fig. 7, there may be a sub contact surface 241 and a sub contact surface 242, but in the structure shown in fig. 7, the contact surface 24 may include only one of the sub contact surface 241 and the sub contact surface 242.

The abutment end 41 may also be provided to prevent the tool holder from turning up when assembled, while limiting the pivoting of the tool holder.

As shown in fig. 7, one end of the tool holder 20 close to the second projection 22 has a first step portion, a vertical surface of which parallel to the thickness direction of the tool holder constitutes a first abutment surface, e.g., one of the sub-abutment surface 241 and the sub-abutment surface 242; as shown in fig. 4, the abutting end 41 of the triggering portion 40 extends to cover the blocking mating surface 26 of the first step portion perpendicular to the thickness direction of the tool holder 20, and the abutting end 41 of the triggering portion 40 has a second abutting surface (e.g., an end surface of the abutting portion 41 in fig. 4) adapted to abut against the first abutting surface (corresponding to the sub-abutting surface 241) to prevent the tool holder 20 from pivoting. When the contact end 41 of the trigger 40 has no step, the second contact surface is an end surface of the contact portion 41.

As shown in fig. 4, the abutting end 41 of the trigger part may have a step part, a vertical surface of the step part parallel to the thickness direction of the abutting end 41 of the trigger part constitutes the second abutting surface (in this case, it may correspond to one or both of the sub abutting surface 241 and the sub abutting surface 242), and a surface of the second step part perpendicular to the thickness direction of the abutting end of the trigger part extends to cover the blocking mating surface 26.

Because the abutting end of the trigger part extends to cover the blocking matching surface 26, the tool holder can be prevented from being turned up when the blood sampler is assembled.

In the illustrated exemplary embodiment of the present invention, the trigger is pivotable based on a pivot shaft disposed between both ends of the trigger. The present invention is not limited to this, as long as the blade ejection can be triggered by applying a force to the operating end of the trigger portion.

As shown in fig. 3, the spring 30 is an extension spring providing a pulling force, and one end of the spring is fixed to the spring post 15 in the housing 10.

In an alternative embodiment, as shown in fig. 3 and fig. 11-14, the operation end 42 of the trigger part is provided with an auxiliary blocking part 43, the auxiliary blocking part 43 has an extension 431 extending into the second opening 12, and a blocking protrusion 432 is provided on the extension, the blocking protrusion 432 is adapted to abut against the spring post 15, and upon the force applied to the operation end 42 of the trigger part, the blocking protrusion 432 is adapted to be turned over the spring post 15.

The auxiliary stopper 43 is engaged with the spring post 15, so that an auxiliary safety function for preventing the erroneous operation of the blood sampling device can be provided.

The safety portion 50 for the blood collection device of the present invention, which provides a safety function against the erroneous operation of the blood collection device, will be described below by way of example with reference to fig. 3 to 4 and fig. 10 to 14. It should be noted that the safety portion 50 is not essential in the present invention. For example, in the case where the trigger portion 40 can maintain a stable state before triggering or operation, the safety portion 50 may not be provided.

As shown in fig. 1 and 10-11, the housing further includes a third opening 16 having a "male" shape, the third opening 16 having a small width portion and a large width portion; the blood sampling device further comprises a safety part 50, one end of the safety part 50 is connected to the trigger part 40 in the accommodating space S as shown in FIG. 3, and the other end of the safety part 50 extends out of the housing 10 from the third opening 16; and the other end of the safety part 50 has an enlarged width part 51 as shown in fig. 10. The width-enlarged portion 51 has a width larger than that of the small-width portion, and is adapted to move from the large-width portion into the accommodation space.

In the case where the thickness of the tool holder 20 is thin and the thickness of the accommodating space S (or the distance between the upper and lower case portions) is large, when the tool holder 20 pivots based on the elastic force of the spring 30, there may be a case where the tool holder 20 is turned up. To this end, the present invention also proposes a structure for restricting the tip-up of the holder 20. Specifically, the housing 10 includes a first housing portion 10A and a second housing portion 10B, which define the accommodating space S; and the holder 20 is provided on the first housing part 10A, and the second housing part 10B is provided with a stopper part 17 (see fig. 8) projecting toward the first housing part 10A, the stopper part 18 being adapted to limit a moving distance of the holder 20 in a thickness direction of the holder in a state where the first housing part and the second housing part are assembled together. As shown in fig. 9, the stopper portion 18 is close to the upper surface of the holder 20.

A blood collection operation of the blood collector according to the exemplary embodiment of the present invention is described below with reference to the accompanying drawings.

The state of the blood collector before the start of the blood collection operation is shown in fig. 1 and 6, in which: the enlarged width portion 51 of the safety 50 abuts on or outside the small width portion of the third opening 16, so that the enlarged width portion 51 cannot move toward the inside of the housing.

The enlarged width portion 51 of the safety 50 is pushed down as shown by the arrow in fig. 10 so that the enlarged width portion 51 moves down to the large width portion of the third opening 16, at which time the enlarged width portion 51 can move toward the inside of the housing via the large width portion. The position of the safety 50 also moves from the position in fig. 3 to the position in fig. 11. The expanded width portion 51 can be prevented from returning to the position shown in fig. 1 after being pressed by making the connection point of the safety portion 50 and the trigger portion 40 weak (e.g., easily bent) or by making the expanded width portion 51 of the safety portion 50 after being pressed because the curvature of the housing at the third opening 16 changes so that the expanded width portion 51 has entered a part of the large width portion of the third opening 16.

As shown in fig. 11, at this time, the abutment end 41 abuts the abutment surface 24 of the tool holder.

As shown in fig. 12, the operating end 42 of the trigger portion 40 is depressed, and in fig. 12, the trigger portion 40 is pivoted about the pivot shaft 40A such that the abutment end 41 is in a state of coming out of abutment contact with the tool holder 20; the stopper projection of the auxiliary stopper 43 passes over the spring post 15 from the state of fig. 11, and the enlarged width portion 51 of the safety 50 is further moved toward the inside of the housing via the large width portion of the third opening 16.

Fig. 13 shows a state in which the tool holder 20 is pulled by the spring 30 to pivot to the tool-ejecting direction after the abutting end 41 is out of contact with the tool holder 20. In the process of the movement of the tool holder 20 from the position of fig. 12 to the position of fig. 13, the first protrusion 22 rotates at an initial position in the first guide groove 13, while the second protrusion 23 is guided by the second guide groove or the second guide portion 14 to move toward the first guide groove 13. Fig. 13 shows a state where the second projection 13 is just moved to the first guide groove 13.

In fig. 14, the holder 20 in the tool-withdrawal direction in fig. 13 is pulled up along the first guide groove 13 by the pulling force of the spring 30, so that the blade 21 is retracted into the internal space S of the housing 10.

Although embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.

Claims

1. A blood collection device, comprising:

a tool holder pivotally disposed within the receiving cavity, the tool holder having a blade disposed thereon, the blade adapted to be exposed to the exterior of the housing via the first opening when the tool holder is pivoted;

the abutting end of the trigger part is positioned in the accommodating space, the operating end of the trigger part extends out of the shell from the second opening, the abutting end of the trigger part is suitable for preventing the tool apron from pivoting, and the abutting end of the trigger part is suitable for allowing the tool apron to pivot based on the stress of the operating end of the trigger part,

wherein:

the cutter holder is provided with a first bulge and a second bulge;

the shell is provided with a first guide groove and a second guide part, the first guide groove is matched with the first bulge, the extending direction of the first guide groove is generally consistent with the cutter discharging direction, and the second guide part is matched with the second bulge so as to guide the second bulge to enter the first guide groove when the spring drives the cutter holder to pivot;

the knife-out direction represents the extension direction of the knife blade when the knife blade is positioned at the position with the maximum depth of penetrating into the skin of a patient; and is

After the second protrusion enters the first guide groove under the guidance of the second guide part, the blade is in the blade-out direction and cannot move in an arc further.

2. A lancing device according to claim 1, wherein:

the abutting end of the trigger portion is adapted to abut against the tool holder to prevent the tool holder from pivoting, and the abutting end of the trigger portion is adapted to be disengaged from the tool holder based on a force applied to the operating end of the trigger portion.

3. A lancing device according to claim 2, wherein:

the first guide groove is provided with a first end close to the first opening and a second end far away from the first opening;

the second guide part is connected between the first end and the second end of the first guide groove; and is

The spring is adapted to drive the holder further towards the second end of the first guide slot.

4. A lancing device according to claim 3, wherein:

the second guide part is provided with an arc-shaped abutting surface which takes the first bulge as a circle center.

5. A lancing device according to claim 4, wherein:

the second guide part is a second guide groove, and the second guide groove is provided with a first end far away from the first guide groove and a second end communicated with the first guide groove;

under the condition that the abutting end of the trigger part abuts against the tool apron, the first protrusion can pivotally abut against the first end of the first guide groove, and the second protrusion can pivotally abut against the first end of the second guide groove.

6. A lancing device according to claim 2, wherein:

one end of the tool apron close to the second protrusion is provided with an abutting surface and an avoiding surface which are positioned on two sides, and the abutting end of the triggering part is suitable for abutting against the abutting surface.

7. A lancing device according to claim 2, wherein:

one end of the tool apron close to the second protrusion is provided with a first step part, and a vertical surface of the first step part parallel to the thickness direction of the tool apron forms a first abutting surface;

the abutting end of the trigger part extends to cover the blocking matching surface of the first step part, perpendicular to the thickness direction of the tool apron, and is provided with a second abutting surface, and the second abutting surface is suitable for abutting with the first abutting surface to prevent the tool apron from pivoting.

8. A lancing device according to claim 7, wherein:

the abutting end of the trigger part is provided with a second step part, a vertical surface of the second step part parallel to the thickness direction of the abutting end of the trigger part forms a second abutting surface, and a surface of the second step part perpendicular to the thickness direction of the abutting end of the trigger part extends to cover the blocking matching surface.

9. A lancing device according to any one of claims 1-8, wherein:

the trigger portion is pivotable based on a pivot shaft disposed between both ends of the trigger portion.

10. A lancing device according to claim 9, wherein:

the spring is an extension spring for providing tensile force, and one end of the spring is fixed on a spring post in the shell.

11. A lancing device according to claim 10, wherein:

the operating end of trigger part is provided with supplementary block portion, supplementary block portion has the extension that extends to in the second opening, and sets up block protruding on the extension, it is suitable for the butt to block protruding the spring post, and based on the operating end atress of trigger part, it is suitable for to overturn to block protruding the spring post.

12. A lancing device according to claim 9, wherein:

the housing further includes a third opening having a "male" shape, the third opening having a small-width portion and a large-width portion;

the blood taking device further comprises a safety part, one end of the safety part is connected to the trigger part in the accommodating space, and the other end of the safety part extends out of the shell from the third opening; and is

The other end of the safety part is provided with an expanded width part, the width of the expanded width part is larger than that of the small width part, and the expanded width part is suitable for moving from the large width part to the accommodating space.

13. A lancing device according to claim 1, wherein:

the shell comprises a first shell part and a second shell part, and the two shell parts limit the accommodating space; and is

The holder is provided on the first housing portion, and the second housing portion is provided with a stopper portion protruding toward the first housing portion, the stopper portion being adapted to restrict a moving distance of the holder in a thickness direction of the holder in a case where the first housing portion and the second housing portion are assembled together.