CN114711769A

CN114711769A - Blood sampling pen

Info

Publication number: CN114711769A
Application number: CN202210312835.5A
Authority: CN
Inventors: 崔刚; 康泰荣; 黄华卫; 池明洙
Original assignee: Eisens Jiangsu Biotechnology Co ltd
Current assignee: Eisens Jiangsu Biotechnology Co ltd
Priority date: 2022-03-28
Filing date: 2022-03-28
Publication date: 2022-07-08

Abstract

The invention discloses a blood sampling pen, which comprises a pressing cap, a pen shell and a pen cap; a blood taking needle is arranged in the pen cap in a sliding manner, and a first elastic piece is further arranged in the blood taking pen; a driving assembly for driving the blood taking needle to move downwards is arranged in the pen shell; the driving component comprises a rotating shaft and a shooting rod penetrating through the rotating shaft; a first partition plate is arranged in the pen shell, a first protruding shaft is fixed at the lower end of the first partition plate, a torsion spring is arranged in the rotating shaft, one end of the torsion spring is connected with the first protruding shaft, and the other end of the torsion spring is connected with the rotating shaft; a first spiral block is fixed on the peripheral wall of the rotating shaft, and a push plate is fixed on the pressing cap; a first spiral groove is formed in the peripheral wall of the rotating shaft, a first bulge is fixed on the injection rod, and the first bulge is embedded into the first spiral groove; the pen shell is provided with a first through hole, and the rotating shaft is also provided with an elastic bulge or an elastic arm. The blood taking needle has high accuracy of ejection movement, avoids the problems of deviation, secondary puncture and the like, and relieves or reduces the pain of a stabbed person.

Description

Blood sampling pen

Technical Field

The invention relates to the technical field of medical instruments, in particular to a blood sampling pen.

Background

The blood sampling pen is a pen-shaped hemostix, and is a manual ejection type auxiliary blood sampling device which is matched with a disposable sterile blood sampling needle to collect peripheral blood samples of a human body. The blood taking pen can be repeatedly used, and the blood taking needle is only disposable in order to avoid cross infection. Under the general condition, the blood sampling pen comprises a shell, a pen cap, a shooting rod spring, a needle seat, a tail handle, a button and the like, wherein a blood sampling needle is inserted in the needle seat of the shooting rod, the shooting rod compresses the shooting rod spring to enter a trigger state to aim at a blood sampling part when the tail handle is pulled, and the shooting rod is triggered to drive the blood sampling needle to puncture by pressing a trigger button; due to the guide gap between the injection rod and the shell, the movement line of the blood taking needle during injection has certain shake and deviation, and secondary puncture can exist, so that the pain of a user is enhanced. In addition, the injection rod is sleeved with the needle seat, and after repeated installation and detachment of the injection rod for a plurality of times for blood sampling, the injection line of the injection rod is deviated, so that the accuracy of puncture of the blood sampling needle is influenced, and the pricking feeling of a human body is enhanced.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the blood taking pen, the injection movement of the blood taking needle is high in accuracy, the problems of deviation, secondary puncture and the like are avoided, and the pain of a punctured person is relieved or reduced; in addition, the blood sampling pen is simple, convenient and quick to operate, the pricking depth can be adjusted in multiple ways, and the blood sampling needle is convenient to detach.

In order to achieve the purpose, the invention provides the following technical scheme: the blood sampling pen comprises a pressing cap, a pen shell and a pen cap; a blood taking needle is arranged in the pen cap in a sliding manner, and a first elastic piece for promoting the blood taking needle to move and reset relative to the pen cap is further arranged in the blood taking pen;

a driving assembly for driving the blood taking needle to move downwards is arranged in the pen shell; the driving assembly comprises a rotating shaft and a shooting rod penetrating in the rotating shaft, and a second elastic piece is arranged in the shooting rod; a first partition plate is arranged in the pen shell, a first protruding shaft is fixed at the lower end of the first partition plate, a torsion spring is arranged in the rotating shaft, one end of the torsion spring is connected with the first protruding shaft, and the other end of the torsion spring is connected with the rotating shaft;

a first spiral block is fixed on the peripheral wall of the rotating shaft, a push plate matched with the first spiral block is fixed on the pressing cap, and the push plate moves downwards to push the first spiral block to rotate along a first direction;

a first spiral groove is formed in the peripheral wall of the rotating shaft, a first bulge is fixed on the shooting rod, and the first bulge is embedded into the first spiral groove; the pen shell is provided with a first through hole, and the rotating shaft is also provided with an elastic bulge or an elastic arm;

when the rotating shaft rotates along the first direction, the torsion spring deforms; meanwhile, the first spiral groove is matched with the first bulge to enable the shooting rod to move upwards and compress the second elastic piece; when the elastic bulge or the elastic arm rotates to the position of the first through hole, the elastic bulge or the elastic arm is embedded into the first through hole to block the rotation of the rotating shaft;

when the elastic bulge or the elastic arm is pressed to be separated from the first through hole, the rotating shaft rotates along the second direction under the action of the torsion spring; meanwhile, the shooting rod moves downwards under the action of the second elastic piece and hits the blood taking needle, and then the blood taking needle moves downwards.

The pressing cap is pressed, the pressing cap moves downwards and drives the push plate to move downwards, the push plate pushes the first spiral block to rotate, the first spiral block rotates and drives the rotating shaft to rotate, the rotating shaft rotates and compresses the torsion spring, meanwhile, the first spiral groove and the first bulge are matched and act together to enable the shooting rod to move upwards and compress the second elastic piece, and when the elastic bulge or the elastic arm rotates to the position of the first through hole, the elastic bulge or the elastic arm is embedded into the first through hole to block the rotation of the rotating shaft, so that the energy storage process of the driving assembly is completed; when blood sampling is carried out, the elastic bulge or the elastic arm is pressed to be separated from the first through hole, and the rotating shaft rotates along the second direction under the action of the torsion spring; meanwhile, the shooting rod moves downwards under the action of the second elastic piece and hits the blood taking needle, so that the blood taking needle moves downwards, and the needle head of the blood taking needle penetrates through the needle outlet of the pen cap to take blood by puncture. The blood sampling pen is simple, convenient and quick to operate, and the ejection movement line is accurate.

Preferably, a needle seat is sleeved on the blood taking needle, and a needle seat connector is further installed on the needle seat; a needle seat support is sleeved outside the needle seat, a third partition plate is arranged in the needle seat support, a second through hole is formed in the third partition plate, and the needle seat connector penetrates through the second through hole and is connected with the needle seat; the needle base connector is provided with the first elastic piece, one end of the first elastic piece is connected with the needle base connector, and the other end of the first elastic piece is connected with the third partition plate.

Preferably, a cap seat is further arranged between the pen shell and the pen cap, a second protrusion is fixed on the outer circumferential wall of the needle seat support, a second sliding groove is formed in the inner circumferential wall of the cap seat corresponding to the second protrusion, and the second protrusion is embedded into the second sliding groove; the second has been seted up to the lower extreme of cap stand and has been dodged the hole, the blood taking needle include the blood taking needle main part and with blood taking needle main part integrated into one piece's acupuncture portion, the size of blood taking needle main part is greater than the size that the hole was dodged to the second.

Preferably, when the shooting rod belongs to the initial position, the lower end of the shooting rod is not contacted with the upper end of the needle seat connector.

Preferably, the blood taking needle is detachably mounted on the needle base, and the pen shell is detachably connected with the cap base.

Preferably, the upper end of the second elastic member is connected with or abutted against the first protruding shaft, and the lower end of the second elastic member is connected with or abutted against the inner wall of the shooting rod.

Preferably, a first groove is formed in the first protruding shaft, a first protruding ring is fixed inside the rotating shaft, a third through hole is formed in the first protruding ring, one end of the torsion spring is embedded into the first groove, and the other end of the torsion spring is inserted into the third through hole.

Preferably, a plurality of first protruding strips are further fixed on the first protruding shaft, a first sliding groove is formed in the inner wall of the injection rod corresponding to the first protruding strips, and the first protruding strips are embedded into the first sliding groove.

Preferably, a pen shell screw cap is further arranged between the pen shell and the pressing cap, and the pressing cap penetrates through the pen shell screw cap; the pressing cap is fixed with a second convex ring, the pen shell nut is in threaded connection with the pen shell, and the second convex ring is arranged in a cavity of the pen shell nut.

Preferably, a button is installed on the pen shell at the first through hole, and a fourth elastic piece for promoting the button to move and reset relative to the pen shell is further installed in the button; and a fifth elastic piece for promoting the pressing cap to move and reset relative to the pen shell is also arranged in the pressing cap.

Preferably, the needle seat is further sleeved with a needle withdrawing sleeve, a third sliding groove is formed in the needle seat, a third bulge is fixed in the needle withdrawing sleeve corresponding to the third sliding groove, the third bulge penetrates through the third sliding groove and extends into the cavity of the needle seat, and the third bulge extends to the upper part of the blood taking needle; the needle withdrawing sleeve slides downwards to drive the blood taking needle to withdraw from the needle seat.

Preferably, a plurality of first marks are arranged on the peripheral wall of the cap base along the circumferential direction of the cap base, each first mark corresponds to different puncture depths, and a second mark matched with the first marks is arranged on the pen cap.

In conclusion, the invention has the following beneficial effects:

1. the blood sampling pen is simple, convenient and quick to operate, the blood sampling needle can obtain higher motion acceleration under the same force application condition through scientific and reasonable structural design, and the driving assembly, the needle seat and the needle withdrawing sleeve are not directly sleeved, so that the accuracy of a motion line ejected by the driving assembly cannot be influenced after the blood sampling needle is repeatedly mounted and dismounted for many times, the puncture accuracy of the blood sampling needle is further ensured, and the pain feeling of blood sampling is reduced;

2. the blood sampling pen effectively avoids the danger of overlarge puncture depth or secondary puncture of the blood sampling needle, reduces accidental injury of a user, and ensures the safety of the user.

3. When blood collection is finished, the blood collection needle can be detached only by operating the seventh bulge, so that the situation that a user manually pulls out the blood collection needle to contaminate blood on the needle head is effectively avoided, and infection of bacteria, viruses and the like is reduced;

4. the cap seat of the blood sampling pen and the outer side of the pen cap are provided with marks corresponding to the puncture depth of the blood sampling needle, so that a user can conveniently make a proper choice according to the self bleeding condition, secondary blood sampling caused by insufficient puncture depth is effectively avoided, and the pain sense enhancement caused by overlarge puncture depth can also be avoided.

Drawings

FIG. 1 is a schematic structural view of a blood collection pen;

FIG. 2 is a cross-sectional view of a lancet;

FIG. 3 is an exploded view of the torsion spring, rotary shaft and shooting bar assembly;

FIG. 4 is a schematic structural view of a pen casing;

FIG. 5 is a top view of the pen housing;

FIG. 6 is a bottom view of the pen housing;

FIG. 7 is a schematic view of the structure of the rotating shaft;

FIG. 8 is a schematic view showing the assembly of the pressing cap with the rotary shaft;

FIG. 9 is a sectional view of the assembled pen casing, rotary shaft, shooting rod, needle holder bracket, needle holder and blood collection needle;

FIG. 10 is a schematic view of the assembled structure of the hub and the lancet;

FIG. 11 is a schematic view of the structure of the shooting rod;

FIG. 12 is a cross-sectional view of the cap base and pen cap assembled;

FIG. 13 is a sectional view of the cap;

fig. 14 is a perspective view of the cap.

Reference numerals: 1. pressing the cap; 2. a pen shell; 3. a pen cap; 4. a first elastic member; 5. a rotating shaft; 6. Shooting a rod; 7. a second elastic member; 8. a first separator; 9. a first protruding shaft; 10. a torsion spring; 11. a first screw block; 12. pushing the plate; 13. a first avoidance hole; 14. a first helical groove; 15. a first protrusion; 16. a first through hole; 17. a resilient arm; 18. a needle seat; 19. a needle seat connector; 20. a needle stand bracket; 21. a third partition plate; 23. the needle seat is connected with the rod part; 24. the needle seat is connected with the head part; 25. clamping and protruding; 26. a third through hole; 27. A cap base; 28. a second protrusion; 29. a second chute; 30. a lancet body; 31. a needling section; 32. a first groove; 33. a first convex ring; 34. a fourth via hole; 35. a first rib; 36. a first chute; 37. a pen shell screw cap; 38. a second convex ring; 39. a button; 40. a fourth elastic member; 41. a fifth elastic member; 42. removing the needle sleeve; 43. a third chute; 44. a third protrusion; 45. a third convex ring; 46. a sixth elastic member; 47. a fourth convex ring; 48. a first identifier; 49. and a second identifier.

Detailed Description

The invention is further illustrated with reference to the accompanying drawings.

The present embodiment discloses a blood sampling pen, as shown in fig. 1 to 14, including a pressing cap 1, a pen shell 2 and a pen cap 3, wherein a needle outlet is provided at the front end of the pen cap 3; a blood taking needle is arranged in the pen cap 3 in a sliding manner, and a first elastic piece 4 for promoting the blood taking needle to move and reset relative to the pen cap 3 is also arranged in the blood taking pen; a driving component for driving the blood taking needle to move downwards is arranged in the pen shell 2; the driving assembly comprises a rotating shaft 5 and a shooting rod 6 penetrating through the rotating shaft 5, and a second elastic piece 7 is arranged in the shooting rod 6; a first partition plate 8 is arranged in the pen shell 2, a first protruding shaft 9 is fixed at the lower end of the first partition plate 8, a torsion spring 10 is arranged in the rotating shaft 5, one end of the torsion spring 10 is connected with the first protruding shaft 9, and the other end of the torsion spring 10 is connected with the rotating shaft 5; a first spiral block 11 is fixed on the peripheral wall of the rotating shaft 5, a push plate 12 matched with the first spiral block 11 is fixed on the pressing cap 1, a first avoidance hole 13 is formed in the position, corresponding to the push plate 12, on the first partition plate 8, the push plate 12 penetrates through the first avoidance hole 13, and the push plate 12 moves downwards to push the first spiral block 11 to rotate along the first direction; a first spiral groove 14 is further formed in the peripheral wall of the rotating shaft 5, a first protrusion 15 is fixed on the injection rod 6, and the first protrusion 15 is embedded into the first spiral groove 14; the pen shell 2 is provided with a first through hole 16, and the rotating shaft 5 is also provided with an elastic bulge or is fixed with an elastic arm 17; when the rotating shaft 5 rotates in the first direction, the torsion spring 10 is deformed; meanwhile, the first spiral groove 14 and the first bulge 15 cooperate to cause the shooting rod 6 to move upwards and compress the second elastic piece 7; when the elastic projection or the elastic arm 17 rotates to the position of the first through hole 16, the end of the elastic projection or the elastic arm 17 is embedded into the first through hole 16 to block the rotation of the rotating shaft 5; when the end of the elastic projection or arm 17 is pressed to be disengaged from the first through hole 16, the rotation shaft 5 is rotated in the second direction by the torsion spring 10; meanwhile, the shoot rod 6 moves downward under the action of the second elastic member 7 and strikes the lancet, thereby moving the lancet downward.

Pressing the pressing cap 1, the pressing cap 1 moves downwards and drives the pushing plate 12 to move downwards, the pushing plate 12 pushes the first spiral block 11 to rotate, the first spiral block 11 rotates and drives the rotating shaft 5 to rotate, the rotating shaft 5 rotates and compresses the torsion spring 10, meanwhile, the first spiral groove 14 and the first bulge 15 are matched and act together to enable the shooting rod 6 to move upwards and compress the second elastic piece 7, when the elastic bulge or the elastic arm 17 rotates to the position of the first through hole 16, the end part of the elastic bulge or the elastic arm 17 is embedded into the first through hole 16 to block the rotation of the rotating shaft 5, and then the energy storage process of the driving assembly is completed; when blood collection is performed, the end part of the elastic bulge or the elastic arm 17 is pressed to be separated from the first through hole 16, and the rotating shaft 5 rotates along the second direction under the action of the torsion spring 10; meanwhile, the injection rod 6 moves downwards under the action of the second elastic piece 7 and hits the blood collection needle, so that the blood collection needle moves downwards, and the needle head of the blood collection needle penetrates through the needle outlet of the pen cap 3 to perform puncture blood collection. The blood sampling pen is simple, convenient and quick to operate, and the ejection movement line is accurate.

In one embodiment, the first direction is clockwise and the second direction is counterclockwise. The lower end of the push plate 12 forms a first spiral surface, and the upper end of the first spiral block 11 forms a second spiral surface matched with the first spiral surface.

In one embodiment, first screw blocks 11 are fixed to opposite sides of the circumferential wall of the rotating shaft 5, and push plates 12 matched with the first screw blocks 11 are fixed to opposite sides of the pressing cap 1. First spiral grooves 14 are respectively formed in two opposite sides of the peripheral wall of the rotating shaft 5, and first protrusions 15 are respectively fixed to the two opposite sides of the injection rod 6 corresponding to the first spiral grooves 14.

In some embodiments, the blood taking needle is sleeved with a needle seat 18, and a needle seat connector 19 is further installed on the needle seat 18; a needle seat support 20 is sleeved outside the needle seat 18, a third partition plate 21 is arranged in the needle seat support 20, a second through hole is formed in the third partition plate 21, and a needle seat connector 19 penetrates through the second through hole and is connected with the needle seat 18; the needle seat connector 19 is provided with a first elastic element 4, one end of the first elastic element 4 is connected with the needle seat connector 19, and the other end of the first elastic element 4 is connected with a third partition 21. The upper end of the rotating shaft abuts against the first partition plate, and the lower end of the rotating shaft abuts against the third partition plate, so that the axial movement of the rotating shaft is restricted.

A needle withdrawing sleeve 42 is further sleeved on the needle seat 18, a third chute 43 is formed in the needle seat 18, a third bulge 44 is fixed in the needle withdrawing sleeve 42 corresponding to the third chute 43, the third bulge 44 penetrates through the second chute 43 and extends into the cavity of the needle seat 18, and the third bulge 44 extends to the upper part of the blood taking needle; sliding the needle retracting sleeve 42 downwardly drives the lancet out of the needle mount 18. The needle withdrawing sleeve 42 is arranged between the needle seat 18 and the needle seat support 20, a third convex ring 45 is fixed at the bottom of the needle seat 18, a sixth elastic piece 46 is further sleeved in the needle withdrawing sleeve 42, one end of the sixth elastic piece 46 abuts against the third bulge 44, the other end of the sixth elastic piece 46 abuts against the third convex ring 45, and after the needle is withdrawn, the sixth elastic piece 46 enables the needle withdrawing sleeve 42 to reset. In addition, a fourth convex ring 47 is fixed on the peripheral wall of the needle withdrawing sleeve 42, so that the needle withdrawing sleeve 42 can be conveniently pressed downwards. Due to the arrangement of the needle withdrawing sleeve 42, a user can conveniently remove the blood taking needle after taking blood, the blood on the needle head is prevented from being infected by manually pulling out the blood taking needle, and the accuracy of the injection motion circuit of the driving assembly cannot be influenced under the condition of repeatedly removing the blood taking needle for a plurality of times because the arrangement position of the needle withdrawing sleeve is not directly connected with the driving assembly.

The needle seat connector 19 comprises a needle seat connecting rod portion 23 and a needle seat connecting head portion 24 integrally formed with the needle seat connecting rod portion 23, a clamping protrusion 25 is formed on the needle seat connecting head portion 23, a third through hole 26 is formed in the upper end of the needle seat 18, and the clamping protrusion 25 penetrates through the third through hole 26 to be clamped with the needle seat 18. Meanwhile, one end of the first elastic element 4 abuts against or is connected with the needle seat connecting head 24, and the other end of the first elastic element 4 abuts against or is connected with the third partition plate 21.

In some embodiments, a cap seat 27 is further disposed between the pen shell 2 and the pen cap 3, a second protrusion 28 is fixed on the outer circumferential wall of the needle holder support 20, a second sliding slot 29 is formed on the inner circumferential wall of the cap seat 27 corresponding to the second protrusion 28, and the second protrusion 28 is embedded in the second sliding slot 29; the second escape hole is formed at the lower end of the cap holder 27, the lancet includes a lancet body 30 and a needle-piercing portion 31 integrally formed with the lancet body 30, and the size of the lancet body 30 is larger than that of the second escape hole. When the lower end of the lancet body 30 contacts the bottom of the cap 27 at the time of blood collection, the downward movement is stopped; when the cap 3 is rotated, the cap 3 is restricted by the second sliding slot 29 to rotate and simultaneously moves axially along the cap holder 27, and the axial movement distance of the cap 3 is equal to the puncture depth of the blood taking needle. Thus, the puncture depth of the blood sampling needle can be adjusted.

Preferably, a plurality of first marks 48 are arranged on the peripheral wall of the cap base 27 along the circumferential direction of the cap base 27, each first mark 48 corresponds to a different puncture depth, and a second mark 49 matched with the first mark 48 is arranged on the pen cap 3. The first mark 48 is in the form of a scale mark, the second mark 49 is in the form of an arrow, and the first mark 48 and the second mark 49 are matched with each other to indicate the puncture depth of the blood taking needle, so that the puncture depth of the blood taking needle can be conveniently and intuitively known, and a proper choice can be made according to the bleeding condition of a user; in addition, the first mark and the second mark can also adopt a mode of numbers, scale marks, round points or a combination of the modes; the outer surface of the pen cap is provided with a plurality of grooves which are arranged at intervals along the axial direction, so that the pen cap can be prevented from slipping when being rotated manually, and the rotating process is more labor-saving.

Preferably, the lower end of the shoot lever 6 does not contact the upper end of the needle hub connector 19 when the shoot lever 6 is in the home position. Because the injection rod 6 is not in contact with the needle seat connector 19, the accuracy of the injection motion line of the driving assembly cannot be influenced after the blood taking needle is repeatedly mounted and dismounted for many times, the puncture accuracy of the blood taking needle is further ensured, and the pain feeling of blood taking is reduced.

In some embodiments, the blood taking needle is detachably mounted on the needle seat 18, specifically, the needle seat 18 is provided with a containing cavity, the lower end of the containing cavity forms an opening, the blood taking needle penetrates through the opening to be embedded into the containing cavity, and the blood taking needle is in interference connection with the containing cavity. In addition, the pen shell 2 is detachably connected with the cap 27, wherein the detachable connection comprises a clamping connection or a threaded connection. So, the blood taking needle is convenient to detach.

In some embodiments, the upper end of the second elastic member 7 is connected to or abutted against the first protruding shaft 9, and the lower end of the second elastic member 7 is connected to or abutted against the inner wall of the shooting rod 6. Preferably, the first protruding shaft 9 is provided with a first groove 32, the rotating shaft 5 is fixed inside with a first protruding ring 33, the first protruding ring 33 is provided with a fourth through hole 34, one end of the torsion spring 10 is embedded into the first groove 32, and the other end of the torsion spring 10 is inserted into the fourth through hole 34. Further, in some embodiments, a plurality of first protruding strips 35 are further fixed on the first protruding shaft 9, a first sliding slot 36 is formed on the inner wall of the shooting rod 6 corresponding to the first protruding strips 35, and the first protruding strips 35 are embedded in the first sliding slot 36. In this manner, the movement direction for restricting the shooting rod 6 is the axial direction.

In some embodiments, a pen shell nut 37 is further disposed between the pen shell 2 and the pressing cap 1, and the pressing cap 1 is disposed through the pen shell nut 37; a second convex ring 38 is fixed on the pressing cap 1, the pen shell nut 37 is in threaded connection with the pen shell 2, and the second convex ring 38 is arranged in a cavity of the pen shell nut 37. Thus, the cap 1 is prevented from being removed from the pen case 2.

In some embodiments, a button 39 is installed on the pen case 2 at the position of the first through hole 16, and a fourth elastic member 40 for urging the button 39 to move and reset relative to the pen case 2 is also installed in the button 39, so that the button 39 can reset in time after being pressed; the pressing cap 1 is also provided with a fifth elastic element 41 for promoting the pressing cap 1 to move and reset relative to the pen shell 2, and the fifth elastic element is used for enabling the pressing cap 1 to reset in time after being pressed.

The first elastic element 4, the second elastic element 7, the third elastic element, the fourth elastic element 40, the fifth elastic element 41, and the sixth elastic element 46 may be springs or other elastic elements.

In conclusion, the blood taking needle has the following beneficial effects:

1. the blood sampling pen is simple, convenient and quick to operate, the blood sampling needle can obtain higher motion acceleration under the same force application condition through scientific and reasonable structural design, and the driving assembly, the needle seat 18 and the needle withdrawing sleeve are not directly sleeved, so that the accuracy of a motion line ejected by the driving assembly cannot be influenced after the blood sampling needle is repeatedly mounted and dismounted for many times, the puncture accuracy of the blood sampling needle is further ensured, and the pain feeling of blood sampling is reduced;

3. When blood collection is finished, the blood collection needle can be detached only by operating the fourth convex ring 47, so that the situation that a user manually pulls out the blood collection needle to contaminate blood on a needle head is effectively avoided, and infection of bacteria, viruses and the like is reduced;

In the present invention, it should be understood that the terms "upper", "lower", and the like indicate orientations or positional relationships based on those shown in the drawings, which are merely for convenience of describing the present invention and simplifying the description, and thus, should not be construed as limiting the present invention.

The directions given in the present embodiment are merely for convenience of describing positional relationships between the respective members and the relationship of fitting with each other. The above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiments, and all technical solutions that belong to the idea of the present invention belong to the scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. The blood sampling pen comprises a pressing cap (1), a pen shell (2) and a pen cap (3); the method is characterized in that: a blood taking needle is arranged in the pen cap (3) in a sliding manner, and a first elastic piece (4) for promoting the blood taking needle to move and reset relative to the pen cap (3) is further arranged in the blood taking pen;

a driving assembly for driving the blood taking needle to move downwards is arranged in the pen shell (2); the driving assembly comprises a rotating shaft (5) and a shooting rod (6) penetrating through the rotating shaft (5), and a second elastic piece (7) is arranged in the shooting rod (6); a first partition plate (8) is arranged in the pen shell (2), a first protruding shaft (9) is fixed at the lower end of the first partition plate (8), a torsion spring (10) is arranged in the rotating shaft (5), one end of the torsion spring (10) is connected with the first protruding shaft (9), and the other end of the torsion spring (10) is connected with the rotating shaft (5);

a first spiral block (11) is fixed on the peripheral wall of the rotating shaft (5), a push plate (12) matched with the first spiral block (11) is fixed on the pressing cap (1), and the push plate (12) moves downwards and can push the first spiral block (11) to rotate along a first direction;

a first spiral groove (14) is formed in the peripheral wall of the rotating shaft (5), a first protrusion (15) is fixed on the shooting rod (6), and the first protrusion (15) is embedded into the first spiral groove (14); the pen shell (2) is provided with a first through hole (16), and the rotating shaft (5) is also provided with an elastic bulge or an elastic arm (17);

when the rotating shaft (5) rotates along the first direction, the torsion spring (10) deforms; meanwhile, the first spiral groove (14) and the first bulge (15) are matched to promote the shooting rod (6) to move upwards and compress the second elastic piece (7); when the elastic bulge or the elastic arm (17) rotates to the position of the first through hole (16), the elastic bulge or the elastic arm (17) is embedded into the first through hole (16) to block the rotation of the rotating shaft (5);

when the elastic bulge or the elastic arm (17) is pressed to be separated from the first through hole (16), the rotating shaft (5) rotates along the second direction under the action of the torsion spring (10); meanwhile, the shooting rod (6) moves downwards under the action of the second elastic piece (7) and hits the blood taking needle, and then the blood taking needle moves downwards.

2. The lancing pen of claim 1, wherein: a needle seat (18) is sleeved on the blood taking needle, and a needle seat connector (19) is further installed on the needle seat (18); a needle seat support (20) is sleeved outside the needle seat (18), a third partition plate (21) is arranged in the needle seat support (20), a second through hole is formed in the third partition plate (21), and the needle seat connector (19) penetrates through the second through hole and is connected with the needle seat (18); be equipped with on needle file connector (19) first elastic component (4), just the one end and the needle file connector (19) of first elastic component (4) are connected, the other end and the third baffle (21) of first elastic component (4) are connected.

3. The lancing pen of claim 2, wherein: a cap seat (27) is further arranged between the pen shell (2) and the pen cap (3), a second protrusion (28) is fixed on the outer peripheral wall of the needle seat support (20), a second sliding groove (29) is formed in the inner peripheral wall of the cap seat (27) corresponding to the second protrusion (28), and the second protrusion (28) is embedded into the second sliding groove (29); the lower end of the cap seat (27) is provided with a second avoiding hole, the blood taking needle comprises a blood taking needle body (30) and a needling part (31) integrally formed with the blood taking needle body (30), and the size of the blood taking needle body (30) is larger than that of the second avoiding hole.

4. The blood collection pen according to claim 2 or 3, wherein: when the shooting rod (6) belongs to the initial position, the lower end of the shooting rod (6) is not contacted with the upper end of the needle seat connector (19).

5. The lancing pen according to claim 1, wherein: the blood taking needle is detachably installed on the needle base (18), and the pen shell (2) is detachably connected with the cap base (27).

6. The lancing pen of claim 1, wherein: the upper end of the second elastic part (7) is connected with or abutted against the first protruding shaft (9), and the lower end of the second elastic part (7) is connected with or abutted against the inner wall of the shooting rod (6).

7. The lancing pen of claim 1, wherein: first recess (32) have been seted up on first protruding axle (9), the inside of rotation axis (5) is fixed with first bulge loop (33), third through-hole (26) have been seted up on first bulge loop (33), in the one end embedding first recess (32) of torsional spring (10), the other end of torsional spring (10) inserts in third through-hole (26).

8. The lancing pen of claim 7, wherein: still be fixed with a plurality of first sand grip (35) on first protruding axle (9), penetrate and seted up first spout (36) corresponding to first sand grip (35) position on the inner wall of pole (6), first sand grip (35) embedding in first spout (36).

9. The lancing pen of claim 1, wherein: a pen shell screw cap (37) is further arranged between the pen shell (2) and the pressing cap (1), and the pressing cap (1) penetrates through the pen shell screw cap (37); a second convex ring (38) is fixed on the pressing cap (1), the pen shell nut (37) is in threaded connection with the pen shell (2), and the second convex ring (38) is arranged in a cavity of the pen shell nut (37).

10. The lancing pen of claim 1, wherein: a button (39) is arranged on the pen shell (2) and positioned in the first through hole (16), and a fourth elastic piece (40) for promoting the button (39) to move and reset relative to the pen shell (2) is also arranged in the button (39); and a fifth elastic piece (41) for promoting the pressing cap (1) to move and reset relative to the pen shell (2) is further installed in the pressing cap (1).

11. The lancing pen according to claim 1, wherein: the needle base (18) is further sleeved with a needle withdrawing sleeve (42), a third sliding groove (43) is formed in the needle base (18), a third protrusion (44) is fixed in the needle withdrawing sleeve (42) corresponding to the third sliding groove (43), the third protrusion (44) penetrates through the third sliding groove (43) and extends into the cavity of the needle base (18), and the third protrusion (44) extends to the upper portion of the blood taking needle; the needle withdrawing sleeve (42) slides downwards to drive the blood taking needle to withdraw from the needle seat (18).

12. The lancing pen of claim 2, wherein: a plurality of first marks (48) are arranged on the peripheral wall of the cap base (27) along the circumferential direction of the cap base (27), each first mark (48) corresponds to different puncture depths, and a second mark (49) matched with the first marks (48) is arranged on the pen cap (3).