Blood puncture bloodletting pen

Abstract

The utility model discloses a blood-letting puncture pen, and relates to the technical field of medical instruments. The blood-letting puncture pen comprises a pen holder, a limiting hole is formed in the bottom end of the pen holder, a square hole is formed in the top end of an inner cavity of the limiting hole, a guide hole is formed in one side wall of the pen holder, the guide hole penetrates through the square hole, a puncture assembly is connected to the inner cavity of the limiting hole in an inserted mode, and the top end of the puncture assembly is connected with an inner cavity of the square hole in an inserted mode. A clamping assembly is inserted into an inner cavity of the guide hole, and the clamping assembly is connected with the piercing assembly in a clamped mode. A rolling assembly is connected to the pen holder in a sleeved mode, a second inner threaded hole is formed in the top end of the pen holder, an adsorption assembly is arranged at the top end of the pen holder, and the bottom end of the adsorption assembly is rotationally connected with an inner cavity of the second inner threaded hole. And two bloodletting assistive devices are additionally arranged on the pen holder, so that the use is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a pricking bloodletting pen. Background Art

[0002] A lancet is a tool used for medical purposes, also known as a lancet or a lancet stick. Pricking therapy is a method of treating diseases by puncturing the superficial veins on certain acupuncture points with a needle to release a small amount of blood. As a traditional medical technique, lancet bloodletting is explained by modern science as a method of reducing local pressure, relieving pain, and regulating body organs through blood outflow. The tip of the pen is treated with special materials. When the patient's skin has a tendency to bleed, the lancet can easily pierce the skin and achieve the purpose of bloodletting.

[0003] However, the existing bloodletting pen needs to be installed and removed from the needle, which poses a safety hazard of needlestick injuries when removing the needle. In addition, there is no auxiliary bloodletting device after bloodletting. Generally, cupping is used to perform negative pressure bloodletting, but cupping is not possible on the fingertips, ear tips and other parts, so bloodletting is done manually by squeezing. Therefore, we have proposed a bloodletting pen to solve the above problems. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the utility model provides a pricking bloodletting pen, which solves the problem that the existing pricking bloodletting pen needs to be loaded and unloaded with a needle, and there is a safety hazard of needlestick injury when the needle is unloaded. In addition, there is no auxiliary bloodletting device after bloodletting. Generally, cupping is added for negative pressure bloodletting, but cupping is not possible on the fingertips, ear tips and other parts, so manual squeezing is used for bloodletting.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a pricking bloodletting pen, comprising a pen holder, a limiting hole is provided at the bottom end of the pen holder, a square hole is provided at the top end of the limiting hole inner cavity, a guide hole is provided at one side wall of the pen holder, and the guide hole passes through the square hole, a piercing assembly is plugged into the limiting hole inner cavity, and the top end of the piercing assembly is plugged and connected to the square hole inner cavity, a clamping assembly is plugged into the guide hole inner cavity, and the clamping assembly is clamped and connected to the piercing assembly;

[0006] A rolling assembly is sleeved on the pen barrel, a second internal threaded hole is opened at the top end of the pen barrel, an adsorption assembly is provided at the top end of the pen barrel, and the bottom end of the adsorption assembly is rotatably connected to the inner cavity of the second internal threaded hole.

[0007] Preferably, the piercing assembly includes a positioning plate inserted into the inner cavity of the limiting hole, a plurality of puncture needles are fixedly provided on the bottom surface of the positioning plate, a square rod is fixedly provided at the center position of the top of the positioning plate, and the square rod is plugged and connected to the inner cavity of the square hole;

[0008] The side wall of the square rod is provided with a plurality of pin holes, and the plurality of pin holes are distributed in a linear array.

[0009] Preferably, the clamping assembly includes a U-shaped frame inserted into the inner cavity of the guide hole, one end of the U-shaped frame is provided with a handle, and one end of the handle extends to the outside of the pen barrel;

[0010] A fixing plate is installed at the other end of the U-shaped frame through a thrust spring, and a side wall of the fixing plate is connected to one end of the inner cavity of the guide hole. A locking pin is provided on the inner wall of the U-shaped frame and located on one side of the U-shaped frame, and the locking pin is plugged into one of the pin holes.

[0011] Preferably, the rolling assembly includes a sleeve sleeved on the pen holder, and C-shaped frames are provided on both side walls of the sleeve near the top, and a clamping rod is installed in the inner cavity of each C-shaped frame through a shaft rod;

[0012] A roller frame is fixedly provided at the bottom end of the clamping rod, and a roller is provided in the inner cavity of the roller frame. Return springs are provided at the lower middle part of the two side walls of the sleeve, and one end of the two return springs is respectively connected to the inner walls of the two clamping rods;

[0013] A first internal threaded hole is provided in the middle of the sleeve surface, and a locking button is rotatably connected to the inner cavity of the first internal threaded hole.

[0014] Preferably, the top view shape of the pen holder is the same as the top view shape of the inner cavity of the sleeve, and the two are plug-connected.

[0015] Preferably, the roller is made of soft silicone.

[0016] Preferably, the adsorption assembly includes a shield, an external threaded rod is fixedly provided at the bottom end of the shield, and the bottom end of the external threaded rod is rotatably connected to the inner cavity of the second internal threaded hole;

[0017] An air bag is provided in the inner cavity of the shield, a soft silicone suction cup is installed at the air inlet end of the air bag, and through holes are provided on both side walls of the shield. Beneficial effects

[0018] The utility model provides a bloodletting pen. Compared with the existing technology, it has the following beneficial effects:

[0019] The bloodletting pen can provide a space for the limiting hole, the square hole, the guide hole and the second internal threaded hole through the pen holder, and can also be used for the sleeve installation of the rolling assembly. When the puncture assembly needs to be installed, the clamping assembly is first inserted into the inner cavity of the guide hole and pressed inwardly, and then the puncture assembly is inserted into the limiting hole, and the top end of the puncture assembly is inserted into the limiting hole. Then, the pressed clamping assembly is released, so that the clamping assembly can be opened and closed to limit the puncture assembly. By pressing the clamping assembly, it is convenient for the staff to adjust the position of the puncture assembly inserted into the limiting hole, so that the exposed length of the needle can be adjusted, and it is convenient for the medical staff to discard the puncture assembly with one click, so that the puncture assembly can be quickly replaced.

[0020] When the puncture component is installed, the medical staff can hold the pen holder to perform multi-needle puncture and bloodletting on the patient, thereby reducing the pain caused by repeated needling. When the needling is completed, the puncture component can be discarded by pressing the clamping component, and then the position height of the rolling component can be adjusted so that the two bottom ends of the rolling component can roll and clamp the part to be bled, and then roll and squeeze to bleed. The adsorption component can be rotatably installed through the second internal threaded hole, and then negative pressure can be formed by squeezing the two sides of the adsorption component to attract blood. Both methods can achieve the purpose of bloodletting, and at the same time, it is convenient for medical staff to disassemble and immerse it for disinfection, thereby improving the convenience of equipment use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the explosion structure of the utility model;

[0023] Figure 3 This is a schematic diagram of the cross-sectional structure of the pen holder of the utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the piercing assembly of the utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the clamping assembly of the utility model;

[0026] Figure 6 This is a schematic diagram of the explosion structure of the rolling assembly of the utility model;

[0027] Figure 7 This is a schematic diagram of the structure of the adsorption component of the utility model.

[0028] In the figure: 1. Pen barrel; 2. Limiting hole; 3. Square hole; 4. Guide hole; 5. Piercing assembly; 51. Positioning plate; 52. Needle; 53. Square rod; 54. Pin hole; 6. Engaging assembly; 61. Handle; 62. U-shaped frame; 63. Locking pin; 64. Thrust spring; 65. Fixing plate; 7. Rolling assembly; 71. Sleeve; 72. C-shaped frame; 73. Shaft; 74. Clamping rod; 75. Roller frame; 76. Roller; 77. Return spring; 78. First internal threaded hole; 79. Locking button; 8. Second internal threaded hole; 9. Adsorption assembly; 91. Protective cover; 92. Externally threaded rod; 93. Airbag; 94. Soft silicone suction cup; 95. Through hole. DETAILED DESCRIPTION

[0029] 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.

[0030] See also Figure 1-3 The utility model provides a technical solution: a pricking bloodletting pen, comprising a pen holder 1, a limiting hole 2 is provided at the bottom end of the pen holder 1, and a square hole 3 is provided at the top end of the inner cavity of the limiting hole 2, a guide hole 4 is provided on one side wall of the pen holder 1, and the guide hole 4 passes through the square hole 3, a piercing component 5 is plugged into the inner cavity of the limiting hole 2, and the top end of the piercing component 5 is plugged and connected to the inner cavity of the square hole 3, a clamping component 6 is plugged into the inner cavity of the guide hole 4, and the clamping component 6 is clamped and connected to the piercing component 5; a rolling component 7 is sleeved on the pen holder 1, a second internal threaded hole 8 is provided at the top end of the pen holder 1, an adsorption component 9 is provided at the top end of the pen holder 1, and the bottom end of the adsorption component 9 is rotatably connected to the inner cavity of the second internal threaded hole 8;

[0031] Through the pen barrel 1, space can be provided for the limiting hole 2, the square hole 3, the guide hole 4 and the second internal threaded hole 8, and the rolling component 7 can be installed. When the puncture component 5 needs to be installed, the snap assembly 6 is first inserted into the inner cavity of the guide hole 4, and the snap assembly 6 is pressed inward, and then the puncture component 5 is inserted into the limiting hole 2, and the top of the puncture component 5 is extended into the limiting hole 2, and then the pressed snap assembly 6 is released, so that the snap assembly 6 can open and close the puncture component 5, and by pressing the snap assembly 6, it is convenient for the staff to adjust the position of the puncture component 5 inserted into the limiting hole 2, so that the exposed length of the needle can be adjusted, and it is convenient for medical staff to discard the puncture component 5 with one click, and then the puncture component can be repaired. 5 Quick replacement. When the puncture component 5 is installed, the medical staff can hold the pen holder 1 to perform multi-needle puncture and bloodletting on the patient, thereby reducing the pain caused by repeated acupuncture. When the acupuncture is completed, the puncture component 5 can be discarded by pressing the clamping component 6. Then, by adjusting the position and height of the rolling component 7, the two bottom ends of the rolling component 7 can be rolled to clamp the part to be bled, and then rolled to squeeze and bleed. The adsorption component 9 can be rotatably installed through the second internal threaded hole 8, and then by squeezing the two sides of the adsorption component 9, negative pressure can be formed to attract blood for negative pressure. Both methods can achieve the purpose of bloodletting and are convenient for medical staff to disassemble and immerse and disinfect, thereby improving the convenience of equipment use.

[0032] See Figure 3 、 Figure 4 The piercing assembly 5 includes a positioning plate 51 inserted into the inner cavity of the limiting hole 2, a plurality of puncture needles 52 are fixedly provided on the bottom surface of the positioning plate 51, a square rod 53 is fixedly provided at the center position of the top of the positioning plate 51, and the square rod 53 is plugged and connected to the inner cavity of the square hole 3; a plurality of pin holes 54 are opened on the side wall of the square rod 53, and the plurality of pin holes 54 are distributed in a linear array;

[0033] The positioning plate 51 in the piercing assembly 5 can be inserted into the inner cavity of the limiting hole 2, and multiple puncture needles 52 and square rods 53 can be installed and fixed. Then, through the square rod 53, the positioning plate 51 can be inserted into the limiting hole 2 and extended into the square hole 3. Then, through the snap assembly 6, it can be inserted into the inner cavity of the pin hole 54 to achieve the snap-in limitation of the square rod 53, and can also be pulled out from the inner cavity of the pin hole 54, so that the positioning plate 51 and the square rod 53 can be easily removed from the limiting hole 2 and the square hole 3, so that medical staff can discard the needles. Through multiple puncture needles 52, patients can be subjected to multi-pinhole acupuncture and bloodletting, thereby reducing the pain caused by repeated acupuncture. Since the multiple pin holes 54 are distributed in a linear array, the snap assembly 6 can be flexibly snapped into any pin hole 54 according to needs, thereby adjusting the exposed length of the puncture needle 52.

[0034] See Figure 3-Figure 5 The locking assembly 6 includes a U-shaped frame 62 inserted into the inner cavity of the guide hole 4, and a handle 61 is provided at one end of the U-shaped frame 62, and one end of the handle 61 extends to the outside of the pen body 1; a fixing plate 65 is installed at the other end of the U-shaped frame 62 through a thrust spring 64, and a side wall of the fixing plate 65 is connected to one end of the inner cavity of the guide hole 4, and a locking pin 63 is provided on the inner wall of the U-shaped frame 62 and on one side of the U-shaped frame 62, and the locking pin 63 is plugged into one of the pin holes 54;

[0035] The U-shaped frame 62 in the clamping assembly 6 can be inserted into the inner cavity of the guide hole 4, and the handle 61, the lock pin 63 and the thrust spring 64 can be installed. Since one end of the thrust spring 64 is against one end of the inner cavity of the guide hole 4 through the fixing plate 65, the U-shaped frame 62 can be moved toward the outside of the guide hole 4 by the elastic force of the thrust spring 64, so that the lock pin 63 on the U-shaped frame 62 can be clamped in one of the pin holes 54, thereby realizing the clamping limit of the other rod 53. The U-shaped frame 62 is moved inward by pressing the handle 61, so that the locking pin 63 on the U-shaped frame 62 can be pulled out from the pin hole 54, so as to release the restriction on the square rod 53 and facilitate the square rod 53 to slide out of the square hole 3, thereby achieving the purpose of discarding the needle.

[0036] See Figure 2 、 Figure 6 The rolling assembly 7 includes a sleeve 71 that is sleeved on the pen barrel 1. C-shaped frames 72 are provided on both sides of the sleeve 71 near the top. A clamping rod 74 is installed in the inner cavity of each C-shaped frame 72 through a shaft 73; a roller frame 75 is fixedly provided at the bottom end of the clamping rod 74, and a roller 76 is provided in the inner cavity of the roller frame 75. Reset springs 77 are provided at the lower middle part of the two side walls of the sleeve 71. One end of the two reset springs 77 is connected to the inner wall of the two clamping rods 74 respectively; a first internal threaded hole 78 is opened in the middle of the surface of the sleeve 71, and a locking button 79 is rotatably connected to the inner cavity of the first internal threaded hole 78. The roller 76 is made of soft silicone.

[0037] The sleeve 71 in the rolling assembly 7 can be sleeved on the pen body 1, and the two C-shaped frames 72 and the two reset springs 77 can be installed. When rolling bloodletting is required for the patient, the position of the sleeve 71 on the pen body 1 can be adjusted by rotating the locking button 79 on the first internal threaded hole 78. Then the medical staff can pinch the two clamping rods 74 with their thumbs and index fingers respectively, so that the two roller frames 75 can drive the two rollers 76 to clamp the part to be bled, and then use the two rollers 76 to squeeze and bleed. Since the rollers 76 are made of soft silicone, painless squeezing can be achieved. The two reset springs 77 can facilitate the resetting of the two clamping rods 74, so that the bleeding part can be repeatedly squeezed.

[0038] See Figure 2 、 Figure 6 The top view shape of the pen holder 1 is the same as the top view shape of the inner cavity of the sleeve 71, and the two are plugged into each other, so that the sleeve 71 can slide smoothly up and down on the pen holder 1.

[0039] See Figure 2 、 Figure 7 The adsorption assembly 9 includes a shield 91, an external threaded rod 92 is fixedly provided at the bottom end of the shield 91, and the bottom end of the external threaded rod 92 is rotatably connected to the inner cavity of the second internal threaded hole 8; an air bag 93 is provided in the inner cavity of the shield 91, and a soft silicone suction cup 94 is installed at the air inlet end of the air bag 93, and through holes 95 are opened on both side walls of the shield 91;

[0040] Through the protective cover 91 in the adsorption component 9, it can be rotated and installed on the second internal threaded hole 8 of the pen body 1 through the external threaded rod 92, and the airbag 93 can be installed and fixed. At the same time, it can provide space for the two through holes 95. Since the air inlet end of the airbag 93 is installed with a soft silicone suction cup 94, the airbag 93 can be squeezed by passing through the through hole 95, so that its internal negative pressure state can be achieved. Then the soft silicone suction cup 94 is attached to the bleeding part, and then the squeezed airbag 93 is released, so that blood can be sucked out by negative pressure.

[0041] During operation, the pen barrel 1 can provide space for the limiting hole 2, the square hole 3, the guide hole 4 and the second internal threaded hole 8, and can also be used to sleeve and install the rolling component 7. When the piercing component 5 needs to be installed, first insert the snap assembly 6 into the inner cavity of the guide hole 4 and press the snap assembly 6 inward, then insert the piercing component 5 into the limiting hole 2, and make the top of the piercing component 5 extend into the limiting hole 2, then release the pressed snap assembly 6, so that the snap assembly 6 can open and close the piercing component 5, and by pressing the snap assembly 6, it is convenient for the staff to adjust the position of the piercing component 5 inserted into the limiting hole 2, so that the exposed length of the needle can be adjusted, and it is convenient for medical staff to discard the piercing component 5 with one click, so that the piercing component 5 can be The component 5 can be replaced quickly. When the puncture component 5 is installed, the medical staff can hold the pen body 1 to perform multi-needle puncture and bloodletting on the patient, thereby reducing the pain caused by repeated acupuncture. When the acupuncture is completed, the puncture component 5 can be discarded by pressing the clamping component 6. Then, by adjusting the position and height of the rolling component 7, the two bottom ends of the rolling component 7 can be rolled to clamp the part to be bled, and then rolled to squeeze and bleed. The adsorption component 9 can be rotatably installed through the second internal threaded hole 8, and then the two sides of the adsorption component 9 can be squeezed to form negative pressure to attract blood. Both methods can achieve the purpose of bloodletting, and at the same time, it is convenient for medical staff to disassemble and immerse it for disinfection, thereby improving the convenience of equipment use.

[0042] The positioning plate 51 in the piercing assembly 5 can be inserted into the inner cavity of the limiting hole 2, and multiple puncture needles 52 and square rods 53 can be installed and fixed. Then, through the square rod 53, the positioning plate 51 can be inserted into the limiting hole 2 and extended into the square hole 3. Then, through the snap assembly 6, it can be inserted into the inner cavity of the pin hole 54 to achieve the snap-in limitation of the square rod 53, and can also be pulled out from the inner cavity of the pin hole 54, so that the positioning plate 51 and the square rod 53 can be easily removed from the limiting hole 2 and the square hole 3, so that medical staff can discard the needles. Through multiple puncture needles 52, patients can be subjected to multi-pinhole acupuncture and bloodletting, thereby reducing the pain caused by repeated acupuncture. Since the multiple pin holes 54 are distributed in a linear array, the snap assembly 6 can be flexibly snapped into any pin hole 54 according to needs, thereby adjusting the exposed length of the puncture needle 52.

[0043] The U-shaped frame 62 in the clamping assembly 6 can be inserted into the inner cavity of the guide hole 4, and the handle 61, the lock pin 63 and the thrust spring 64 can be installed. Since one end of the thrust spring 64 is against one end of the inner cavity of the guide hole 4 through the fixing plate 65, the U-shaped frame 62 can be moved toward the outside of the guide hole 4 by the elastic force of the thrust spring 64, so that the lock pin 63 on the U-shaped frame 62 can be clamped in one of the pin holes 54, thereby realizing the clamping limit of the other rod 53. The U-shaped frame 62 is moved inward by pressing the handle 61, so that the locking pin 63 on the U-shaped frame 62 can be pulled out from the pin hole 54, so as to release the restriction on the square rod 53 and facilitate the square rod 53 to slide out of the square hole 3, thereby achieving the purpose of discarding the needle.

[0044] The sleeve 71 in the rolling assembly 7 can be sleeved on the pen body 1, and the two C-shaped frames 72 and the two reset springs 77 can be installed. When rolling bloodletting is required for the patient, the position of the sleeve 71 on the pen body 1 can be adjusted by rotating the locking button 79 on the first internal threaded hole 78. Then the medical staff can pinch the two clamping rods 74 with their thumbs and index fingers respectively, so that the two roller frames 75 can drive the two rollers 76 to clamp the part to be bled, and then use the two rollers 76 to squeeze and bleed. Since the rollers 76 are made of soft silicone, painless squeezing can be achieved. The two reset springs 77 can facilitate the resetting of the two clamping rods 74, so that the bleeding part can be repeatedly squeezed.

[0045] Through the protective cover 91 in the adsorption component 9, it can be rotated and installed on the second internal threaded hole 8 of the pen body 1 through the external threaded rod 92, and the airbag 93 can be installed and fixed. At the same time, it can provide space for the two through holes 95. Since the air inlet end of the airbag 93 is installed with a soft silicone suction cup 94, the airbag 93 can be squeezed by passing through the through hole 95, so that its internal negative pressure state can be achieved. Then the soft silicone suction cup 94 is attached to the bleeding part, and then the squeezed airbag 93 is released, so that blood can be sucked out by negative pressure.

[0046] In summary, the device utilizes multiple needles for acupuncture and bloodletting, which reduces the pain caused by repeated acupuncture, and two bloodletting auxiliary instruments are added to the pen holder 1 for easy use.

[0047] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A bloodletting pen, comprising a pen holder (1), a limiting hole (2) is provided at the bottom end of the pen holder (1), a square hole (3) is provided at the top end of the inner cavity of the limiting hole (2), a guide hole (4) is provided on one side wall of the pen holder (1), and the guide hole (4) passes through the square hole (3), characterized in that: The inner cavity of the limiting hole (2) is plugged with a piercing component (5), and the top end of the piercing component (5) is plugged and connected with the inner cavity of the square hole (3); the inner cavity of the guide hole (4) is plugged with a snap-fit component (6), and the snap-fit component (6) is snap-fitted and connected with the piercing component (5); A rolling assembly (7) is sleeved on the pen shaft (1), a second internal threaded hole (8) is opened at the top end of the pen shaft (1), an adsorption assembly (9) is provided at the top end of the pen shaft (1), and the bottom end of the adsorption assembly (9) is rotatably connected to the inner cavity of the second internal threaded hole (8).

2. The bloodletting pen according to claim 1, characterized in that: The piercing assembly (5) comprises a positioning plate (51) plugged into the inner cavity of the limiting hole (2), a plurality of puncture needles (52) are fixedly provided on the bottom surface of the positioning plate (51), a square rod (53) is fixedly provided at the center position of the top of the positioning plate (51), and the square rod (53) is plugged and connected to the inner cavity of the square hole (3); A plurality of pin holes (54) are provided on the side wall of the square rod (53), and the plurality of pin holes (54) are distributed in a linear array.

3. The bloodletting pen according to claim 2, characterized in that: The engaging assembly (6) comprises a U-shaped frame (62) inserted into the inner cavity of the guide hole (4); a handle (61) is provided at one end of the U-shaped frame (62), and one end of the handle (61) extends to the outside of the pen holder (1); A fixing plate (65) is installed at the other end of the U-shaped frame (62) via a thrust spring (64), and a side wall of the fixing plate (65) is connected to one end of the inner cavity of the guide hole (4). A locking pin (63) is provided on the inner wall of the U-shaped frame (62) and located on one side of the U-shaped frame (62). The locking pin (63) is plugged and connected to one of the pin holes (54).

4. The bloodletting pen according to claim 1, characterized in that: The rolling assembly (7) comprises a sleeve (71) sleeved on the pen holder (1), C-shaped frames (72) are provided on both side walls of the sleeve (71) and near the top, and a clamping rod (74) is installed in the inner cavity of each C-shaped frame (72) via a shaft (73); A roller frame (75) is fixedly provided at the bottom end of the clamping rod (74), and a roller (76) is provided in the inner cavity of the roller frame (75). Return springs (77) are provided at the lower middle portion of the two side walls of the sleeve (71), and one end of the two return springs (77) is connected to the inner walls of the two clamping rods (74) respectively. A first internal threaded hole (78) is provided in the middle of the surface of the sleeve (71), and a locking button (79) is rotatably connected to the inner cavity of the first internal threaded hole (78).

5. The bloodletting pen according to claim 4, characterized in that: The top view shape of the pen holder (1) is the same as the top view shape of the inner cavity of the sleeve (71), and the two are plug-connected.

6. The bloodletting pen according to claim 4, characterized in that: The roller (76) is made of soft silica gel.

7. The bloodletting pen according to claim 1, characterized in that: The adsorption assembly (9) comprises a shield (91), an external threaded rod (92) is fixedly provided at the bottom end of the shield (91), and the bottom end of the external threaded rod (92) is rotatably connected to the inner cavity of the second internal threaded hole (8); An air bag (93) is provided in the inner cavity of the shield (91), a soft silicone suction cup (94) is installed at the air inlet end of the air bag (93), and through holes (95) are provided on both side walls of the shield (91).

Images