Blood collection pen

Abstract

The present invention relates to a blood collection pen, comprising: a head cap, the proximal end of which is provided with a needle hole; a connecting tube, the distal end of which is connected to the proximal end of the connecting tube; a guide sleeve, the proximal end of which is connected to the inside of the distal end of the connecting tube, the distal end of the guide sleeve having a limiting end face, the limiting end face being provided with a guide sleeve through hole; a core body, the proximal end of which is suitable for installing a needle body, the proximal end of the core body being located in the guide sleeve; an outer shell, the proximal end of which is sleeved on the distal end of the guide sleeve, a partition is provided in the outer shell, the partition being provided with a partition through hole; an end cover connected to the distal end of the core body; a launching spring for launching the core body, wherein: the distal end of the core body is suitable for passing through the guide sleeve through hole and the partition through hole in sequence; the outer shell is suitable for moving in the axial direction relative to the guide sleeve, and based on the movement of the outer shell in the direction from the proximal end to the distal end, the partition in the outer shell drives the core body to move to bias the launching spring. Based on this technical solution, the outer shell replaces the tail cap in the prior art, reducing the number of components of the blood collection pen.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of medical devices, and in particular to a blood collection pen. Background Art

[0002] The existing blood collection pen has many parts and a large volume due to structural limitations. Figure 8-10 The utility model relates to a blood collection pen in an existing design. Figure 8 It is an exploded view of an existing lancing pen, comprising: a head cap 101, a pen cap inner core 102, a connecting tube 103, a guide sleeve 104, a needle withdrawal key 105, a cross piece 106, a button 107, an inner core 108, an outer shell 109, a baffle 110, a straight piece 111, and a tail cap 112. Fig. 9 Shows Figure 8 The cooperation mode of the inner core 108, the cross piece 106 and the spring 70 of the blood collection pen. Fig.10 yes Figure 8 The cross-sectional view of the blood collection pen in FIG. 1 shows a schematic diagram of the tail cap 112, the spring 80, and the baffle 110 jointly driving the inner core 108 to move so that the spring 70 is pre-stressed.

[0003] It can be seen that in Figure 8-10 The blood collection pen shown includes 12 parts. Figure 8-10 In the lancing device shown, the spring 70 is pre-stressed by pulling the tail cap 112. Obviously, due to the large number of components, the lancing device in the prior art design is relatively large in size.

[0004] In addition, due to the large number of components, the structure of the existing blood collection pen is complex and the manufacturing cost is high. Summary of the invention

[0005] In order to reduce the number of components of the lancing pen or to reduce the volume of the lancing pen and reduce the manufacturing cost, the present invention proposes the following technical solution.

[0006] According to one aspect of an embodiment of the present invention, the present invention provides a blood collection device, comprising:

[0007] A head cap, wherein a pinhole is arranged at the proximal end of the head cap;

[0008] A connecting tube, wherein the distal end of the head cap is connected to the proximal end of the connecting tube;

[0009] A guide sleeve, wherein the proximal end of the guide sleeve is connected to the interior of the distal end of the connecting tube, the distal end of the guide sleeve has a limiting end surface, and the limiting end surface is provided with a guide sleeve through hole;

[0010] A core body, the proximal end of which is suitable for mounting the needle body, and the proximal end of the core body is located in the guide sleeve;

[0011] The outer shell has a proximal end sleeved on the distal end of the guide sleeve, a partition is arranged in the outer shell, and the partition is provided with a partition through hole;

[0012] The end cap is connected to the distal end of the core.

[0013] an elastic unit, comprising a launching spring for launching the core,

[0014] in:

[0015] The distal end of the core body is adapted to pass through the guide sleeve through hole and the partition plate through hole in sequence;

[0016] The housing is adapted to move in an axial direction relative to the guide sleeve. Based on the movement of the housing in a direction from the proximal end to the distal end, the partition in the housing drives the core to move to bias the firing spring.

[0017] Based on the technical solution of the present invention, the core body is pulled by moving the outer shell relative to the guide sleeve, which replaces the technical solution of using the tail cap to pull the core body in the existing design. The tail cap in the existing design can be omitted, which can reduce the number of components of the lancing pen.

[0018] Optionally, a launching spring is arranged between a corresponding component on the core body and the limiting end surface; based on the movement of the shell in the direction from the proximal end to the distal end, the partition inside the shell pushes the core body in the direction from the proximal end to the distal end to place the core body in the position to be launched and the launching spring is compressed.

[0019] Optionally, the corresponding component on the core body includes a spring abutment surface, and the launching spring sleeved on the core body is arranged between the spring abutment surface and the limiting end surface.

[0020] In the technical solution of the present invention, the spring abutment surface provided on the needle core can be used to replace the cross piece in the existing design, which can further reduce the number of components of the lancing pen.

[0021] Optionally, the distal end of the shell is an open end, and the end cap is suitable for entering and exiting the distal end of the shell or moving within the distal end of the shell.

[0022] Optionally, the elastic unit further comprises a return spring, which is sleeved on the distal end of the core and arranged between the end cover and the partition; the return spring is compressed based on the partition in the shell pushing the core in the direction from the proximal end to the distal end.

[0023] In the technical solution of the present invention, the end cover is used to replace the straight piece and the blocking piece in the existing design, which can further reduce the number of components of the lancing device.

[0024] Optionally, a limiting surface is provided between the proximal end and the distal end of the guide sleeve; the core body has an elastic arm, the end of the elastic arm has a top surface, and the top surface is suitable for abutting against the limiting surface; in the ready-to-launch position of the core body, the top surface abuts against the limiting surface.

[0025] Optionally, the housing is integrally provided with a button, and the button is suitable for pressing the elastic arm radially inward when the top surface abuts against the limiting surface so that the top surface is separated from the limiting surface.

[0026] Optionally, the button includes a button body, a distal end of the button body is connected to the shell body, and other sides of the button body are spaced apart from the shell body, and a proximal end of the button body is suitable for moving radially inward based on the button body being pressed.

[0027] Optionally, the button body includes a trigger portion and a contact portion, the trigger portion is suitable for being pressed radially inward, and the inner side surface of the contact portion has a radially inward protrusion, and the protrusion is suitable for abutting against the elastic arm.

[0028] In the technical solution of the present invention, a button integrated with the housing is used to replace the button that is independent of the housing in the existing design, which can further reduce the number of components of the lancing pen.

[0029] Optionally, the proximal outer side surface of the guide sleeve is snap-connected to the inner wall of the connecting tube.

[0030] Optionally, the distal end of the head cap is snap-connected to the proximal end of the connecting tube.

[0031] Optionally, the inner wall of the head cap is provided with a hanging platform, and the outer wall of the proximal end of the connecting tube is provided with a guide groove, and the hanging platform is suitable for cooperating with the guide groove.

[0032] Optionally, the guide groove includes a matching groove arranged obliquely in the circumferential direction of the outer wall of the connecting tube, and the matching groove is suitable for cooperating with the hanging platform to adjust the puncture depth; the inner wall of the head cap and the outer wall of the connecting tube are also provided with a puncture depth adjustment and determination structure that cooperate with each other.

[0033] Optionally, the inner wall of the head cap is provided with a plurality of grooves spaced apart along the circumferential direction, and the outer wall of the connecting tube is provided with a boss, and based on the rotation of the head cap relative to the connecting tube, the boss cooperates with different grooves, and the boss and the plurality of grooves constitute the piercing depth adjustment determination structure.

[0034] In the technical solution of the present invention, a single connecting tube replaces the inner core of the pen cap and the connecting tube in the existing design, which can further reduce the number of components of the lancing pen.

[0035] The embodiment of the present invention further provides a blood collection device, comprising:

[0036] A head cap, wherein a pinhole is arranged at the proximal end of the head cap;

[0037] A connecting tube, wherein the distal end of the head cap is detachably connected to the proximal end of the connecting tube;

[0038] A guide sleeve, wherein the proximal end of the guide sleeve is connected to the interior of the distal end of the connecting tube, the distal end of the guide sleeve has a limiting end surface, the limiting end surface is provided with a guide sleeve through hole, and the guide sleeve is provided with a limiting surface between the proximal end and the distal end thereof;

[0039] The core body has a proximal end suitable for mounting the needle body, the proximal end of the core body is located in the guide sleeve, the distal end of the core body passes through the guide sleeve through hole, the core body has an elastic arm, the end of the elastic arm has a top surface, the top surface is suitable for abutting against the limiting surface, and the core body is provided with a spring abutting surface;

[0040] The outer shell is integrally provided with a button, and the button is adapted to press the elastic arm radially inward when the top surface abuts against the limiting surface so that the top surface is separated from the limiting surface. The proximal end of the outer shell is sleeved on the distal end of the guide sleeve, and the distal end of the outer shell is an open end. A partition is provided in the outer shell, and the partition is provided with a partition through hole for the distal end of the core body to pass through.

[0041] an end cap connected to the distal end of the core and adapted to move in and out of the distal end of the housing or within the distal end of the housing;

[0042] A launching spring, sleeved on the core body and arranged between the spring abutment surface and the limiting end surface; and

[0043] The return spring is sleeved on the distal end of the core body and arranged between the end cover and the partition plate.

[0044] The embodiment of the present invention further provides a blood collection device, comprising:

[0045] A head cap, wherein a pinhole is arranged at the proximal end of the head cap;

[0046] A connecting tube, wherein the distal end of the head cap is connected to the proximal end of the connecting tube;

[0047] A guide sleeve, wherein the proximal end of the guide sleeve is connected to the interior of the distal end of the connecting tube, the distal end of the guide sleeve has a limiting end surface, and the limiting end surface is provided with a guide sleeve through hole;

[0048] A core body, the proximal end of which is suitable for mounting the needle body, and the proximal end of the core body is located in the guide sleeve;

[0049] The outer shell has a proximal end sleeved on the distal end of the guide sleeve, a partition is arranged in the outer shell, and the partition is provided with a partition through hole;

[0050] The end cap is connected to the distal end of the core.

[0051] in:

[0052] The distal end of the core body is adapted to pass through the guide sleeve through hole and the partition plate through hole in sequence;

[0053] The distal end of the housing is an open end, and based on the axial movement of the housing relative to the guide sleeve, the end cap is adapted to move in and out of the open end in the axial direction.

[0054] When the number of components of the lancing pen is reduced, the volume of the lancing pen can be reduced, and of course the manufacturing cost can also be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 is a three-dimensional schematic diagram of a blood collection device according to an exemplary embodiment of the present invention;

[0056] Figure 2 A three-dimensional schematic diagram of a pen cap of a lancing device according to an exemplary embodiment of the present invention;

[0057] Figure 3 It is a three-dimensional schematic diagram of a connecting barrel of a lancing pen according to an exemplary embodiment of the present invention;

[0058] Figure 4 A schematic three-dimensional diagram of a housing of a lancing device according to an exemplary embodiment of the present invention;

[0059] Figure 5 It is a cross-sectional schematic diagram of a lancing device according to an exemplary embodiment of the present invention when a firing spring is pre-stressed;

[0060] Figure 6 It is a cross-sectional schematic diagram of a lancing pen after the inner core is reset according to an exemplary embodiment of the present invention;

[0061] Figure 7 is a cross-sectional schematic diagram exemplarily showing that a firing spring is biased or compressed by pulling the housing;

[0062] Figure 8 An exploded view of a lancing pen in an existing design;

[0063] Fig. 9 for Figure 8 A schematic diagram of the matching method of the inner core, the cross piece and the spring of the lancing pen;

[0064] Fig.10 It is a cross-sectional view of a blood collection pen in the prior art design, showing that the tail cap, the spring, and the baffle jointly drive the inner core to move so that the spring is pre-stressed. DETAILED DESCRIPTION

[0065] The technical solution of the present invention is further specifically described below by examples and in conjunction with the accompanying drawings. In the specification, the same or similar reference numerals indicate 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 overall inventive concept of the present invention and should not be construed as a limitation of the present invention.

[0066] Please refer to the attached Figure 1-7 A blood collection device according to an exemplary embodiment of the present invention is described in detail. It should be noted that some features or components are not specifically shown in the drawings for clarity. As shown in the figure, in a specific embodiment, the blood collection device according to the present invention includes:

[0067] A head cap 10, wherein a pinhole is provided at the proximal end of the head cap;

[0068] A connecting tube 20, the distal end of the head cap is detachably connected to the proximal end of the connecting tube;

[0069] A guide sleeve 50, the proximal end of which is connected to the interior of the distal end of the connecting tube, the distal end of the guide sleeve having a limiting end surface 52, the limiting end surface being provided with a guide sleeve through hole 53, and a limiting surface 51 being provided between the proximal end and the distal end of the guide sleeve;

[0070] A core body 40, the proximal end of which is suitable for mounting the needle body, the proximal end of which is located in the guide sleeve, the distal end of which passes through the through hole of the guide sleeve, the core body having an elastic arm 41, the end of which has a top surface 42, the top surface being suitable for abutting against the limiting surface 51, and the core body being provided with a spring abutting surface 43;

[0071] The housing 30 is integrally provided with a button, and the button is adapted to press the elastic arm 41 radially inward when the top surface 42 abuts against the limiting surface 51 so that the top surface is separated from the limiting surface. The proximal end of the housing 30 is sleeved on the distal end of the guide sleeve 50, and the distal end of the housing 30 is an open end. A partition 34 is provided inside the housing 30, and the partition 34 is provided with a partition through hole 34A for the distal end of the core 40 to pass through.

[0072] an end cap 60 connected to the distal end of the core 40 and adapted to enter and exit the distal end of the housing 30 or to move within the distal end of the housing 30;

[0073] A launching spring 70, sleeved on the core 40 and disposed between the spring abutment surface 43 and the limiting end surface 52; and

[0074] The return spring 80 is sleeved on the distal end of the core 40 and disposed between the end cover 60 and the partition plate 34 .

[0075] In the present invention, the proximal end refers to the end close to the needle hole of the pen cap, and the distal end refers to the end close to the needle hole of the pen cap, for example. Figure 5 One end of the end cap 60 in the.

[0076] like Figure 5 As shown, the proximal outer side surface of the guide sleeve 50 is snap-connected to the inner wall of the connecting tube 20 .

[0077] Compared with the existing lancing pen which generally includes 12 plastic parts, the lancing pen of the present invention has only 6 plastic parts. As shown in the figure, the lancing pen of the present invention also has no needle withdrawal function, that is, no needle withdrawal key is provided.

[0078] Based on the technical solution of the present invention, the outer shell 30 is moved relative to the guide sleeve 50 to pull the core body 40, which replaces the technical solution of using the tail cap 112 to pull the core body in the existing design, that is, the function of the tail cap 112 is replaced by the outer shell 30, which can save the tail cap 112 in the existing design, thereby reducing the number of components of the lancing pen.

[0079] In the technical solution of the present invention, the spring abutment surface 43 provided on the needle core 40 can be used to replace the cross piece 106 in the existing design, which can further reduce the number of components of the lancing device.

[0080] like Figure 5 and 7 As shown, the distal end of the housing 30 is an open end, and the end cap 60 is suitable for entering and exiting the distal end of the housing 30 or moving in the distal end of the housing. In the technical solution of the present invention, the end cap 60 is used to replace the straight piece 111 and the baffle 110 in the existing design, which can further reduce the number of components of the lancing device.

[0081] like Figure 7 As shown, the return spring 80 is compressed based on the diaphragm 34 in the housing 30 pushing the core 40 in the direction from the proximal end to the distal end. It should be noted that the return spring 80 can also be omitted.

[0082] like Figure 4 , Figure 5 and Figure 7 As shown, the housing 30 is integrally provided with a button, which is suitable for when the top surface abuts against the limit surface ( Figure 5 As shown in FIG. 1 , the elastic arm 41 is pressed radially inwardly to separate the top surface from the limiting surface.

[0083] The key includes a key body, a distal end of the key body is connected to the housing 30 body, and other sides of the key body are spaced apart from the housing body, and a proximal end of the key body is adapted to move radially inwardly based on the key body being pressed.

[0084] like Figure 3 As shown, the key body includes a trigger portion 31 and a contact portion 32. The trigger portion 31 is suitable for being pressed radially inward, and the inner side surface of the contact portion 32 has a radially inward protrusion, such as Figure 5 As shown, the protrusion is suitable for abutting against the elastic arm 41. Figure 3As shown, the trigger portion 31 is long and narrow, connected to the housing 30 in the direction of the end cap 60 (i.e., the distal end), and disconnected in the other three directions. In order to facilitate its deformation by pressing, in one embodiment, its length is more than twice its width, and its connecting portion 33 (see Figure 5 ) The wall thickness is thinner than that of other parts, for example 1 / 4.

[0085] In the technical solution of the present invention, a button integrated with the housing 30 is used to replace the button 107 that is independent of the housing in the existing design, which can further reduce the number of components of the lancing device.

[0086] The proximal outer side surface of the guide sleeve is snap-connected to the inner wall of the connecting tube.

[0087] In one embodiment of the present invention, the distal end of the head cap 10 is snap-connected to the proximal end of the connecting tube 20 .

[0088] like Figure 2 As shown, the inner wall of the head cap 10 is provided with a hanging platform 11. Figure 3 As shown, the outer wall of the proximal end of the connecting tube 20 is provided with a guide groove, and the hanging platform is suitable for cooperating with the guide groove. More specifically, the guide groove includes a matching groove 22 arranged obliquely in the circumferential direction of the outer wall of the connecting tube, and the matching groove 22 is suitable for cooperating with the hanging platform 11 to adjust the puncture depth; the inner wall of the head cap 10 and the outer wall of the connecting tube 20 are also provided with a puncture depth adjustment and determination structure that cooperates with each other. In a more specific embodiment, see Figure 2 and Figure 3 The inner wall of the head cap 10 is provided with a plurality of grooves 12 spaced apart in the circumferential direction, and the outer wall of the connecting tube is provided with a boss 23. Based on the rotation of the head cap 10 relative to the connecting tube 20, the boss 23 cooperates with different grooves 12, and the boss 23 and the plurality of grooves 12 constitute the piercing depth adjustment determination structure. The grooves 12 are evenly distributed in the circumferential direction inside the head cap 10, and the boss 23 cooperates with them. During the reciprocating rotation of the boss 23, it jumps between the grooves 12, which can provide the user with a change in hand feel and sound.

[0089] In the technical solution of the present invention, a single connecting tube 20 replaces the pen cap inner core 102 and the connecting tube 103 in the existing design, which can further reduce the number of components of the lancing pen.

[0090] Compared with the blood collection pen in the existing design, the blood collection pen of the present invention has four fewer plastic parts inside (the baffle 110, the straight piece 111, the cross piece 106 and the pen cap inner core 102 in the existing design). Therefore, the volume of the blood collection pen based on the present invention can be only 1 / 2-2 / 3 of the volume of the existing blood collection pen.

[0091] Before blood sampling, turn the head cap 10 to adjust the puncture depth to match the thickness of the skin; when the launch spring 70 is pre-stressed (such as Figure 7 As shown in the figure, the top surface 42 is against the limit surface 51, and the convex surface of the elastic arm 41 is adjacent to the contact portion 32. When the trigger portion 31 is pressed, the elastic arm 41 is elastically deformed, and the top surface 42 is out of the control of the limit surface 51. Under the elastic force of the launch spring 70, the inner core 40 drives the blood collection needle 90 to pierce out. After the blood collection is completed, the return spring 80 pulls the inner core 40 back to the original position, as shown in the figure. Figure 6 shown.

[0092] Based on the above, the present invention also proposes the following technical solutions:

[0093] 1. A blood collection pen, comprising:

[0094] A head cap, wherein a pinhole is arranged at the proximal end of the head cap;

[0095] A connecting tube, wherein the distal end of the head cap is connected to the proximal end of the connecting tube;

[0096] A guide sleeve, wherein the proximal end of the guide sleeve is connected to the interior of the distal end of the connecting tube, the distal end of the guide sleeve has a limiting end surface, and the limiting end surface is provided with a guide sleeve through hole;

[0097] A core body, the proximal end of which is suitable for mounting the needle body, and the proximal end of the core body is located in the guide sleeve;

[0098] The outer shell has a proximal end sleeved on the distal end of the guide sleeve, a partition is arranged in the outer shell, and the partition is provided with a partition through hole;

[0099] The end cap is connected to the distal end of the core.

[0100] an elastic unit, comprising a launching spring for launching the core,

[0101] in:

[0102] The distal end of the core body is adapted to pass through the guide sleeve through hole and the partition plate through hole in sequence;

[0103] The housing is adapted to move in an axial direction relative to the guide sleeve. Based on the movement of the housing in a direction from the proximal end to the distal end, the partition in the housing drives the core to move to bias the firing spring.

[0104] 2. A blood collection pen, comprising:

[0105] A head cap, wherein a pinhole is arranged at the proximal end of the head cap;

[0106] A connecting tube, wherein the distal end of the head cap is directly connected to the proximal end of the connecting tube;

[0107] A guide sleeve, wherein the proximal end of the guide sleeve is connected to the interior of the distal end of the connecting tube, the distal end of the guide sleeve has a limiting end surface, and the limiting end surface is provided with a guide sleeve through hole;

[0108] A core body, the proximal end of which is suitable for mounting the needle body, and the proximal end of the core body is located in the guide sleeve;

[0109] The outer shell has a proximal end sleeved on the distal end of the guide sleeve, a partition is arranged in the outer shell, and the partition is provided with a partition through hole;

[0110] The end cap is connected to the distal end of the core.

[0111] in:

[0112] The distal end of the core body is adapted to pass through the guide sleeve through hole and the partition plate through hole in sequence;

[0113] The distal end of the housing is an open end, and based on the axial movement of the housing relative to the guide sleeve, the end cap is adapted to move in and out of the open end in the axial direction.

[0114] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A blood collection pen, comprising: A head cap (10), wherein a pinhole is provided at the proximal end of the head cap; A connecting tube (20), the distal end of the head cap being connected to the proximal end of the connecting tube; A guide sleeve (50), wherein the proximal end of the guide sleeve is connected to the interior of the distal end of the connecting tube, the distal end of the guide sleeve has a limiting end surface (52), and the limiting end surface is provided with a guide sleeve through hole (53); A core body (40), the proximal end of which is suitable for mounting the needle body, and the proximal end of the core body is located in the guide sleeve; A shell (30), the proximal end of the shell being sleeved on the distal end of the guide sleeve, a partition (34) being arranged in the shell, and the partition having a partition through hole (34A); an end cap (60) connected to the distal end of the core, an elastic unit, comprising a launching spring (70) for launching the core, in: The distal end of the core body is adapted to pass through the guide sleeve through hole and the partition plate through hole in sequence; The housing is adapted to move in an axial direction relative to the guide sleeve. Based on the movement of the housing in a direction from the proximal end to the distal end, the partition in the housing drives the core to move to bias the firing spring.

2. The lancing device according to claim 1, wherein: The launching spring is arranged between the corresponding component on the core body and the limiting end surface; Based on the movement of the housing in the direction from the proximal end to the distal end, the diaphragm in the housing pushes the core in the direction from the proximal end to the distal end, so that the core is placed in the cocking position and the firing spring is compressed.

3. The lancing device according to claim 2, wherein: The corresponding component on the core body comprises a spring abutment surface (43), and the emission spring sleeved on the core body is arranged between the spring abutment surface and the limiting end surface.

4. The lancing device according to claim 1, wherein: The distal end of the housing is an open end, and the end cap is adapted to enter and exit the distal end of the housing or to move within the distal end of the housing.

5. The lancing device according to claim 1, wherein: The elastic unit further comprises a return spring (80), which is sleeved on the distal end of the core and arranged between the end cover and the partition plate; The return spring is compressed based on the diaphragm in the housing pushing the core in the proximal to distal direction.

6. The lancing device according to claim 1, wherein: The guide sleeve is provided with a limited surface (51) between its proximal end and distal end; The core body has an elastic arm (41), the end of the elastic arm has a top surface (42), and the top surface is suitable for abutting against the limiting surface; At the ready-to-launch position of the core body, the top surface abuts against the limiting surface.

7. The lancing device according to claim 6, wherein: The housing is integrally provided with a button, and the button is adapted to press the elastic arm radially inward when the top surface abuts against the limiting surface so that the top surface is separated from the limiting surface.

8. The lancing device according to claim 7, wherein: The key comprises a key body, a distal end of the key body is connected to the shell body, and other sides of the key body are spaced apart from the shell body, and a proximal end of the key body is adapted to move radially inwardly based on the key body being pressed.

9. The lancing device according to claim 8, wherein: The key body comprises a trigger portion (31) and a contact portion (32), the trigger portion is suitable for being pressed radially inwards, and the inner side surface of the contact portion has a radially inward protrusion, and the protrusion is suitable for abutting against the elastic arm.

10. The lancing device according to claim 1, wherein: The proximal outer side surface of the guide sleeve is snap-connected to the inner wall of the connecting tube.

11. The lancing device according to claim 1, wherein: The distal end of the head cap is snap-connected to the proximal end of the connecting tube.

12. The lancing device according to claim 11, wherein: The inner wall of the head cap is provided with a hanging platform (11), and the outer wall of the proximal end of the connecting tube is provided with a guiding groove (21 / 22), and the hanging platform is suitable for cooperating with the guiding groove.

13. The lancing device according to claim 12, wherein: The guide groove comprises a matching groove (22) arranged obliquely in the circumferential direction of the outer wall of the connecting tube, and the matching groove is suitable for matching with the hanging platform to adjust the piercing depth; The inner wall of the head cap and the outer wall of the connecting tube are also provided with mutually matching puncture depth adjustment and determination structures (12 / 23).

14. The lancing device according to claim 13, wherein: The inner wall of the head cap is provided with a plurality of grooves (12) spaced apart along the circumferential direction, and the outer wall of the connecting tube is provided with a boss (23). Based on the rotation of the head cap relative to the connecting tube, the boss cooperates with different grooves, and the boss and the plurality of grooves constitute the puncture depth adjustment determination structure.

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