Blood puncture bloodletting pen

Abstract

The utility model belongs to the technical field of bloodletting pens, and discloses a blood-letting puncture bloodletting pen which comprises a driving part and a material storage part, a plurality of guide channels are formed in the material storage part in an annular array mode, disposable blood taking needles are arranged in the guide channels, the driving part comprises a pushing part and a shell part, a guide cavity is formed in the shell part in the length direction of the shell part, and the pushing part is arranged in the guide cavity. The pushing part can move back and forth along the guide cavity, the shell part rotates relative to the material storage piece so that the pushing part can be located above any guide channel, and the moving direction of the pushing part is the same as the moving direction of the disposable blood taking needle. The push part on the shell part is aligned with any one disposable blood taking needle on the material storage part, the push part pushes the disposable blood taking needle to pierce the skin of a patient for bloodletting, and after one bloodletting operation is completed and the device is disinfected, the shell part can be continuously rotated for secondary bloodletting, so that the bloodletting difficulty is reduced, and the bloodletting efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bloodletting pens, and in particular relates to a bloodletting pen. Background Art

[0002] In traditional Chinese medicine, bloodletting therapy is widely used in the treatment of various diseases due to its unique efficacy and mechanism. When using traditional bloodletting, it is necessary to place a disposable bloodletting needle in the bloodletting pen in advance to fix it, and then press the bloodletting pen to make the disposable bloodletting needle in the bloodletting pen pierce the patient's skin for bloodletting. However, the existing bloodletting pen has certain defects. For example, in the Chinese patent with the announcement number "CN 211410156 U", a bloodletting pen is disclosed. The device includes a pen body, the interior of the pen body is hollow, the top of the pen body is provided with a limiting ring, the bottom of the pen body is provided with a convex ring, a plurality of slides are provided on the convex ring, and each of the slides is provided with a slot connected thereto, the outer circumferential wall of the convex ring is provided with an external thread, the interior of the pen body is provided with a pen holder, the top of the pen holder is provided with a button, the button extends out of the limiting ring, the bottom of the pen holder is provided with a convex column, a spring is sleeved on the convex column, and the bottom of the convex column is provided with a slot, and the slot docks There is a disposable blood collection needle, which is provided with a fixed clamping ring at the position corresponding to the clamping slot, and a plurality of clamping blocks are provided on the inner wall of the fixed clamping ring, and the clamping blocks are slidably connected to the slide groove, and the clamping blocks are engaged with the clamping slot. A pen tip is provided on the end of the convex ring, and an internal thread is provided on the top of the inner wall of the pen tip. Therefore, when the device is used, a single disposable blood collection needle needs to be placed in advance. After the bloodletting operation is performed, the disposable blood collection needle is taken out and the bloodletting operation is performed again. The above operation needs to be performed each time bloodletting is performed, so the use steps are relatively cumbersome, which increases the difficulty of bloodletting and reduces the efficiency of bloodletting. Utility Model Content

[0003] The purpose of the utility model is to provide a pricking bloodletting pen to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pricking bloodletting pen, comprising a driving part and a storage part, wherein the storage part is provided with a plurality of guide channels in a circular array, and a movable disposable blood collection needle is arranged inside the guide channel, the driving part comprises a pushing part and a shell part rotatably connected to the storage part, a guide cavity is formed inside the shell part along its own length direction, the pushing part can move back and forth along the guide cavity, and the pushing part is positioned above any guide channel by rotating the shell part relative to the storage part, and the moving direction of the pushing part is the same as the moving direction of the disposable blood collection needle.

[0005] Preferably, the material storage member includes a needle storage tube, and the needle storage tube is provided with a plurality of needle storage holes in a circular array along the length direction thereof, and the disposable blood collection needle is installed inside the needle storage hole.

[0006] Preferably, the shell part includes a rotating rack, which is rotatably connected to the needle storage tube and is provided with a through hole matching the needle storage hole. The top of the rotating rack is fixedly connected to the outer shell, and a hollow inner cavity is formed inside the outer shell. The inner cavity is connected to the through hole, and the pushing part is installed inside the inner cavity.

[0007] Preferably, a protective cover for shielding the needle storage hole is rotatably connected to the bottom of the needle storage tube, and a plurality of through-type pulling holes are provided in a circular array on the protective cover, and the pulling holes match the needle storage holes one by one.

[0008] Preferably, a rubber plate for contacting the needle storage tube is bonded to the side of the rotating frame facing the needle storage tube.

[0009] Preferably, the side of the rubber plate facing the needle storage tube is concave to form an arc-shaped groove matching the needle storage tube.

[0010] Preferably, the housing portion includes a rotating frame, the bottom of the rotating frame is rotatably connected to a connecting shaft, the axis of the needle storage tube is provided with a through-type connecting hole along its length direction, the needle storage tube is provided with a bottom hole coaxially arranged with the connecting hole, the bottom hole is located below the connecting hole, and the bottom hole is fixedly connected to a bottom plate, the axis of the bottom plate is provided with a through-type jack, and the bottom plate is symmetrically provided with two limiting holes, and the jack is located between the two limiting holes.

[0011] The free end of the connecting shaft moves through the connecting hole, and the bottom of the connecting shaft is screwed and connected with two limiting heads that match the limiting holes.

[0012] Preferably, the bottom of the protective cover is sunken and opened to form a bottom groove.

[0013] Preferably, the pushing portion includes a moving rod, a spring is sleeved on the moving rod, and a moving plate is fixedly connected to the circumference of the moving rod, a limiting ring is fixedly connected to the interior of the inner cavity, an inner hole is opened on the limiting ring for the moving rod to move, and the inner cavity is located between the moving plate and the limiting ring;

[0014] The bottom of the movable rod is fixedly connected with a magnetic plate, and the top of the disposable blood collection needle is provided with a magnetic metal sheet.

[0015] Preferably, a pressing head is fixedly connected to the top of the moving rod, a pressing head is provided on one side of the shell, and a pen clip is fixedly connected to the peripheral surface of the shell.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] (1) The utility model provides a shell part and a storage part, and multiple disposable blood collection needles are placed in the storage part. The shell part is rotated relative to the storage part, so that the pushing part on the shell part is aligned with any disposable blood collection needle on the storage part. The disposable blood collection needle is pushed by the pushing part to pierce the patient's skin for bloodletting. After completing a bloodletting operation and disinfecting the device, the shell part can be rotated again to perform a second bloodletting. There is no need to remove and replenish the disposable blood collection needle every time bloodletting is performed, which reduces the use steps, reduces the difficulty of bloodletting, and improves the efficiency of bloodletting.

[0018] (2) On the basis of the above beneficial effects, the utility model can complete the installation of the needle storage tube and the disposable blood collection needle by providing a needle storage tube with a connecting hole, passing the connecting shaft on the rotating frame through the connecting hole, and screwing the limiting head with the connecting shaft. When the disposable blood collection needle is used up, it is only necessary to disassemble the limiting head and remove the needle storage tube as a whole, and then the needle storage tube and the disposable blood collection needle can be replaced in batches, thereby further reducing the difficulty of bloodletting and improving the efficiency of bloodletting. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is one of the three-dimensional diagrams of the present utility model;

[0020] Figure 2 This is the second stereogram of the present utility model;

[0021] Figure 3 This is the third stereogram of the present utility model;

[0022] Figure 4 It is a cross-sectional view of the driving member of the utility model;

[0023] Figure 5 This is one of the cross-sectional views of the material storage member of the present utility model;

[0024] Figure 6 This is the second cross-sectional view of the material storage member of the present utility model;

[0025] Figure 7 for Figure 4 Enlarged view of part A in the middle;

[0026] Figure 8 This is a schematic diagram of the protective cover structure of the utility model;

[0027] Figure 9 This is a schematic diagram of the hole-pulling structure of the present utility model;

[0028] Figure 10 This is a schematic diagram of the bottom trough structure of the present utility model.

[0029] In the figure: 1. Driving part; 11. Housing; 12. Pressing head; 13. Inner cavity; 14. Moving plate; 15. Limiting ring; 16. Through hole; 17. Rubber plate; 18. Connecting shaft; 19. Rotating frame; 110. Limiting head; 111. Moving rod; 112. Pen clip; 113. Spring; 114. Magnetic plate; 2. Storage part; 21. Needle storage tube; 22. Needle storage hole; 23. Magnetic metal sheet; 24. Disposable blood collection needle; 25. Jack; 26. Limiting hole; 27. Bottom plate; 28. Bottom hole; 29. ​​Pull hole; 210. Protective cover; 211. Bottom groove; 212. Connecting hole. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] See also Figures 1-10 As shown, the utility model provides the following technical solutions: a pricking bloodletting pen, comprising a driving member 1 and a storage member 2, wherein the storage member 2 is provided with a plurality of guide channels in a ring array, and a movable disposable blood collection needle 24 is arranged inside the guide channel, the driving member 1 comprises a pushing part and a shell part rotatably connected to the storage member 2, a guide cavity is formed inside the shell part along its own length direction, the pushing part can move back and forth along the guide cavity, and the pushing part is positioned above any guide channel by rotating the shell part relative to the storage member 2, and the moving direction of the pushing part is the same as the moving direction of the disposable blood collection needle 24.

[0032] By the above technical solution, before the medical staff needs to bleed the patient, they place the unused disposable blood collection needles 24 one by one in the guide channel on each storage member 2. After the disposable blood collection needle 24 is placed, the shell part is rotated relative to the storage member 2, so that the pushing part is aligned with the storage member 2 and rotated, so that the pushing part is above any guide channel on the storage member 2, and the position on the storage member 2 that coincides with the pushing part is aligned with the position where the patient needs to bleed, and the pushing part is pushed to move the pushing part inside the shell part, and then the pushing part pushes the disposable blood collection needle 24 to move, so that the disposable blood collection needle 24 pierces the patient's skin, and then bleeds the patient. When the storage member 2 is currently in the After the disposable blood collection needle 24 is used, the shell part is rotated relative to the storage part 2, so that the pushing part is aligned with the storage part 2 and rotated, so that the pushing part is above another guide channel on the storage part 2, and the position on the storage part 2 that coincides with the pushing part is aligned with the position where the patient needs to bleed, and the pushing part is pushed to move the pushing part inside the shell part, and then the pushing part pushes the disposable blood collection needle 24 to move, so that the disposable blood collection needle 24 pierces the patient's skin, and then bleeds the patient. Continuing the above steps, medical staff can bleed multiple times. After the disposable blood collection needle 24 on the storage part 2 is used, it is only necessary to replace the storage part 2 where the disposable blood collection needle 24 is placed in advance.

[0033] Specifically, in one embodiment, regarding the above-mentioned storage member 2:

[0034] like Figure 1-Figure 3 and Figure 5-Figure 6 As shown, the storage member 2 includes a needle storage tube 21 , which has a plurality of needle storage holes 22 arranged in a circular array along its length, and a disposable blood collection needle 24 is installed inside the needle storage hole 22 .

[0035] In this embodiment, when personnel need to place a disposable blood collection needle 24, the disposable blood collection needle 24 is placed in the needle storage tube 21, so that the disposable blood collection needle 24 fills all the needle storage tubes 21. When the medical staff pushes the disposable blood collection needle 24 in the needle storage tube 21 through the pushing part, the disposable blood collection needle 24 is used to bleed the patient. If the personnel needs to replenish the disposable blood collection needle 24, they only need to insert the disposable blood collection needle 24 into the needle storage hole 22 on the needle storage tube 21.

[0036] In addition, regarding how the housing portion and the needle storage tube 21 are connected, the present invention provides the following embodiments:

[0037] Implementation Method 1

[0038] like Figures 1-4As shown, the shell part includes a rotatable frame 19, which is rotatably connected to the needle storage tube 21, and a through hole 16 matching the needle storage hole 22 is opened on the rotatable frame 19. The top of the rotatable frame 19 is fixedly connected to the outer shell 11, and a hollow inner cavity 13 is formed inside the outer shell 11. The inner cavity 13 is connected to the through hole 16, and the pushing part is installed inside the inner cavity 13.

[0039] In this embodiment, before the medical staff needs to bleed the patient, they place the unused disposable blood collection needles 24 one by one in each needle storage hole 22 on the needle storage tube 21. After the disposable blood collection needles 24 are placed, the rotating frame 19 is rotated relative to the storage member 2, so that the pushing portion is aligned with the storage member 2 and rotated, so that the pushing portion is above any guide channel on the storage member 2, and the position on the storage member 2 that coincides with the pushing portion is aligned with the position where the patient needs to bleed, and the pushing portion is pushed to move the pushing portion inside the inner cavity 13 inside the shell 11, and through the through hole 16, the pushing portion pushes the disposable blood collection needle 24 to move, so that the disposable blood collection needle 24 pierces the patient's skin, and then the patient is bleeded. To perform bloodletting, after the disposable blood collection needle 24 at the current position of the corresponding needle storage hole 22 on the needle storage tube 21 is used, the rotating frame 19 and the shell 11 are rotated relative to the needle storage tube 21, so that the pushing part rotates the needle storage tube 21, so that the pushing part is above another needle storage hole 22 on the needle storage tube 21, and the position on the needle storage tube 21 that coincides with the pushing part is aligned with the position where the patient needs bloodletting, and the pushing part is pushed to move the pushing part inside the shell 11, and then the pushing part pushes the disposable blood collection needle 24 to move, so that the disposable blood collection needle 24 pierces the patient's skin, and then the patient is bled. Continuing the above steps, medical personnel can perform multiple bloodletting after filling the disposable blood collection needle 24.

[0040] Implementation Method 2

[0041] The housing portion includes a rotating frame 19, the bottom of which is rotatably connected to the connecting shaft 18. A through-type connecting hole 212 is provided at the axis of the needle storage tube 21 along its length. A bottom hole 28 is provided inside the needle storage tube 21, coaxially arranged with the connecting hole 212. The bottom hole 28 is located below the connecting hole 212, and a bottom plate 27 is fixedly connected to the bottom hole 28. A through-type insertion hole 25 is provided at the axis of the bottom plate 27, and two limiting holes 26 are symmetrically provided on the bottom plate 27, with the insertion hole 25 located between the two limiting holes 26.

[0042] The free end of the connecting shaft 18 moves through the needle storage hole 22 , and the bottom of the connecting shaft 18 is screwed and connected to two limiting heads 110 that match the limiting holes 26 .

[0043] In this embodiment, before the medical staff needs to bleed the patient, they place the unused disposable blood collection needles 24 one by one in each needle storage hole 22 on the needle storage tube 21. After the disposable blood collection needles 24 are placed, according to the above steps, the unused disposable blood collection needles 24 are placed one by one in each needle storage hole 22 on another needle storage tube 21, so that the unused disposable blood collection needles 24 fill the needle storage tube 21. The bottom of the connecting shaft 18 is inserted from the connecting hole 212 at the top of the needle storage tube 21, and the top of the limiting head 110 is inserted from the socket 25 on the bottom plate 27, so that the protrusion on the limiting head 110 passes through the limiting hole 26, and then the limiting head 110 is inserted into the bottom plate 27. The head 110 is screwed together with the connecting shaft 18, so that the needle storage tube 21 is installed on the connecting shaft 18, and the rotating frame 19 is rotated relative to the connecting shaft 18, and then the rotating frame 19 is rotated relative to the storage member 2, so that the pushing portion is aligned with the storage member 2 and rotates, so that the pushing portion is above any guide channel on the storage member 2, and the position where the needle storage hole 22 on the needle storage tube 21 overlaps with the pushing portion is aligned with the position where the patient needs to bleed, and the pushing portion is pushed to move inside the inner cavity 13 inside the shell 11, and through the through hole 16, the pushing portion pushes the disposable blood collection needle 24 to move, so that the disposable blood collection needle 24 pierces the patient's skin, and enters When bleeding the patient, after the disposable blood collection needle 24 at the current position of the corresponding needle storage hole 22 on the needle storage tube 21 is used, the rotating frame 19 and the shell 11 are rotated relative to the needle storage tube 21, so that the pushing part rotates the needle storage tube 21, so that the pushing part is above another needle storage hole 22 on the needle storage tube 21, and the position on the needle storage tube 21 that coincides with the pushing part is aligned with the position where the patient needs to bleed, and the pushing part is pushed to move the pushing part inside the shell 11, and then the pushing part pushes the disposable blood collection needle 24 to move, so that the disposable blood collection needle 24 pierces the patient's skin, and then the patient is bled. The above steps are continued. The medical staff fills the disposable blood collection needle 24 and performs blood drawing multiple times. When all the disposable blood collection needles 24 in the needle storage tube 21 are used, the limit head 110 is rotated to separate the limit head 110 from the connecting shaft 18, and the needle storage tube 21 after the disposable blood collection needle 24 is used can be removed. The bottom of the connecting shaft 18 is inserted into the connecting hole 212 at the top of the needle storage tube 21 where the disposable blood collection needle 24 is not used, and then the top of the limit head 110 is inserted into the socket 25 on the bottom plate 27 so that the protrusion on the limit head 110 passes through the limit hole 26, and then the limit head 110 is screwed together with the connecting shaft 18, so that the needle storage tube 21 is installed on the connecting shaft 18.

[0044] In addition, in the present invention, when the needle storage tube 21 is idle, in order to prevent foreign matter from clogging the needle storage tube 21, Figure 1-Figure 3 、 Figures 8-10As shown, a protective cover 210 for shielding the needle storage hole 22 is rotatably connected to the bottom of the needle storage tube 21 . The protective cover 210 is provided with a plurality of through-type pulling holes 29 in a circular array, and the pulling holes 29 match the needle storage holes 22 one by one.

[0045] In this embodiment, when the medical staff does not need to use the needle storage tube 21, the protective cover 210 is pulled through the pulling hole 29 to rotate the protective cover 210 relative to the needle storage tube 21 until the protective cover 210 blocks the needle storage tube 21. When the medical staff needs to use the needle storage tube 21, the protective cover 210 is pulled through the pulling hole 29 to match the pulling hole 29 on the protective cover 210 with the needle storage hole 22 on the needle storage tube 21.

[0046] When personnel adjust the position of the rotating frame 19, in order to make the adjusted position of the rotating frame 19 more stable, such as Figure 3 、 Figure 4 As shown, a rubber plate 17 for resisting the needle storage tube 21 is bonded to the side of the rotating frame 19 facing the needle storage tube 21;

[0047] The side of the rubber plate 17 facing the needle storage tube 21 is concave to form an arc-shaped groove matching the needle storage tube 21 .

[0048] In this embodiment, when a person adjusts the position of the rotating frame 19 , the rubber plate 17 abuts against the needle storage tube 21 , so that the adjusted position of the rotating frame 19 is more stable.

[0049] When a person needs to rotate the protective cover 210, in order to facilitate pulling the protective cover 210, as shown in FIG. Figure 10 As shown, the bottom of the protective cover 210 is sunken and opened to form a bottom groove 211, which makes it easier to pull the protective cover 210.

[0050] Specifically, in one embodiment, regarding the above-mentioned pushing portion:

[0051] like Figures 1-4 As shown, the pushing part includes a moving rod 111, a spring 113 is sleeved on the moving rod 111, and a moving plate 14 is fixedly connected to the circumference of the moving rod 111. A limit ring 15 is fixedly connected to the interior of the inner cavity 13. The limit ring 15 has an inner hole for the moving rod 111 to move. The inner cavity 13 is located between the moving plate 14 and the limit ring 15.

[0052] The bottom of the moving rod 111 is fixedly connected to a magnetic plate 114 , and the top of the disposable blood collection needle 24 is provided with a magnetic metal sheet 23 .

[0053] When the movable plate 14 moves, the spring 113 is compressed, and the bottom of the spring 113 is supported by the limiting ring 15. The movable rod 111 drives the magnetic plate 114 to move, so that the magnetic plate 114 drives the magnetic metal sheet 23 to move, and then the bottom of the magnetic metal sheet 23 contacts the magnetic metal sheet 23 at the top of the disposable blood collection needle 24, and drives the disposable blood collection needle 24 to move, pushing the disposable blood collection needle 24 to move, so that the disposable blood collection needle 24 pierces the patient's skin, and then bleeds the patient. After the disposable blood collection needle 24 bleeds, the spring 113 rebounds, and the movable rod 111 drives the magnetic plate 114 to move back, so that the magnetic plate 114 drives the disposable blood collection needle 24 to move back to the inside of the needle storage tube 21.

[0054] When people use it, in order to make the moving rod 111 easier to press, as shown in FIG. Figures 1-4 As shown, a pressing head 12 is fixedly connected to the top of the moving rod 111 , a pressing head 12 is provided on one side of the housing 11 , and a pen clip 112 is fixedly connected to the peripheral surface of the housing 11 .

[0055] In this embodiment, when a person needs to press the moving rod 111 , the pressing head 12 facilitates the pressing of the moving rod 111 , and the pen clip 112 facilitates the fixing of the housing 11 .

[0056] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bloodletting pen, characterized by: The invention comprises a driving member (1) and a material storage member (2), wherein the material storage member (2) is provided with a plurality of guide channels in an annular array, wherein a movable disposable blood collection needle (24) is arranged inside the guide channel, and the driving member (1) comprises a pushing portion and a shell portion rotatably connected to the material storage member (2), wherein a guide cavity is formed inside the shell portion along its own length direction, and the pushing portion can move back and forth along the guide cavity, and the pushing portion is positioned above any guide channel by rotating the shell portion relative to the material storage member (2), and the moving direction of the pushing portion is the same as the moving direction of the disposable blood collection needle (24).

2. The bloodletting pen according to claim 1, characterized in that: The material storage member (2) comprises a needle storage tube (21), wherein the needle storage tube (21) is provided with a plurality of needle storage holes (22) in a circular array along its length direction, and the disposable blood collection needle (24) is installed inside the needle storage hole (22).

3. The bloodletting pen according to claim 2, characterized in that: The shell portion includes a rotating frame (19), the rotating frame (19) is rotatably connected to the needle storage tube (21), and a through hole (16) matching the needle storage hole (22) is opened on the rotating frame (19), the top of the rotating frame (19) is fixedly connected to the outer shell (11), a hollow inner cavity (13) is formed inside the outer shell (11), the inner cavity (13) is connected to the through hole (16), and the pushing part is installed inside the inner cavity (13).

4. A bloodletting pen according to claim 2 or 3, characterized in that: The bottom of the needle storage tube (21) is rotatably connected to a protective cover (210) for shielding the needle storage hole (22). The protective cover (210) is provided with a plurality of through-type pulling holes (29) in a circular array, and the pulling holes (29) are matched one by one with the needle storage holes (22).

5. The bloodletting pen according to claim 3, characterized in that: A rubber plate (17) for resisting the needle storage tube (21) is bonded to one side of the rotating frame (19) facing the needle storage tube (21).

6. The bloodletting pen according to claim 5, characterized in that: The side of the rubber plate (17) facing the needle storage tube (21) is concave to form an arc-shaped groove matching the needle storage tube (21).

7. The bloodletting pen according to claim 2, characterized in that: The housing portion includes a rotating frame (19), the bottom of the rotating frame (19) is rotatably connected to a connecting shaft (18), the axis of the needle storage tube (21) is provided with a through-type connecting hole (212) along its length direction, the inside of the needle storage tube (21) is provided with a bottom hole (28) coaxially arranged with the connecting hole (212), the bottom hole (28) is located below the connecting hole (212), and the inside of the bottom hole (28) is fixedly connected to a bottom plate (27), the axis of the bottom plate (27) is provided with a through-type plug hole (25), and two limiting holes (26) are symmetrically provided on the bottom plate (27), and the plug hole (25) is located between the two limiting holes (26). The free end of the connecting shaft (18) moves through the connecting hole (212), and the bottom of the connecting shaft (18) is screwed and connected with two limiting heads (110) that match the limiting holes (26).

8. The bloodletting pen according to claim 4, characterized in that: The bottom of the protective cover (210) is recessed and opened to form a bottom groove (211).

9. The bloodletting pen according to claim 3, characterized in that: The pushing part includes a moving rod (111), a spring (113) is sleeved on the moving rod (111), and a moving plate (14) is fixedly connected to the circumference of the moving rod (111), a limiting ring (15) is fixedly connected inside the inner cavity (13), and an inner hole for the moving rod (111) to move is opened on the limiting ring (15), and the inner cavity (13) is located between the moving plate (14) and the limiting ring (15); The bottom of the moving rod (111) is fixedly connected to a magnetic plate (114), and the top of the disposable blood collection needle (24) is provided with a magnetic metal sheet (23).

10. The bloodletting pen according to claim 9, characterized in that: The top of the moving rod (111) is fixedly connected to a pressing head (12), one side of the shell (11) is provided with a pressing head (12), and the peripheral surface of the shell (11) is fixedly connected to a pen clip (112).

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