CN115990303B - Sliding block type negative pressure suction injector - Google Patents
Sliding block type negative pressure suction injector Download PDFInfo
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- CN115990303B CN115990303B CN202310287591.4A CN202310287591A CN115990303B CN 115990303 B CN115990303 B CN 115990303B CN 202310287591 A CN202310287591 A CN 202310287591A CN 115990303 B CN115990303 B CN 115990303B
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Abstract
The invention belongs to the technical field of negative pressure pumping injectors, and relates to a sliding block type negative pressure pumping injector, which comprises a needle cylinder main body and a plunger rod; a connecting rod deep groove is formed in the plunger rod along the axis direction of the plunger rod, a connecting rod is arranged in the connecting rod deep groove, the upper part of the connecting rod and the upper part of the connecting rod deep groove are in a step shape, and a spring is arranged between a shaft shoulder at the step of the connecting rod and a shaft shoulder at the step of the connecting rod deep groove; the lower part of the connecting rod is provided with an inclined through hole, an upper sliding hole is arranged on a plunger rod at one side of the connecting rod deep groove corresponding to the upper end of the inclined through hole, a lower sliding hole is arranged on a plunger rod at the other side of the connecting rod deep groove corresponding to the lower end of the inclined through hole, and the upper sliding hole and the lower sliding hole are communicated with the inclined through hole; the inclined through hole is internally provided with an inclined sliding block, and the top surface and the bottom surface of the inclined sliding block are respectively provided with an upper inclined surface and a lower inclined surface; two ends of the inclined sliding block are respectively positioned in the upper sliding hole and the lower sliding hole. After the body fluid at the designated position is extracted to enable the corresponding position to be in a negative pressure state, self-locking can be completed by means of the structure of the body fluid self-locking device, manual holding is not needed to maintain the negative pressure state, and the body fluid self-locking device is safe, reliable, simple in structure and easy to operate.
Description
Technical Field
The invention relates to a sliding block type negative pressure pumping injector, and belongs to the technical field of negative pressure pumping injectors.
Background
The injector is a common medical appliance, has relatively uniform structure, comprises a hollow syringe main body, a plunger rod arranged in the syringe main body, a piston at the front end of the plunger rod, and a needle connected with the front end of the syringe main body, wherein the elastic piston is in interference fit with the inner wall of the syringe main body. Clinically, the syringe is sometimes used for pumping negative pressure and maintaining the negative pressure state, so as to assist in completing the operation at the corresponding position, and after the operation is completed, the body fluid in the syringe is returned to the corresponding position. For example, in the case of surgery, a highly viscous liquid such as fat or effusion is extracted from a patient's body at a designated surgical site, so that the surgical site is maintained in a certain negative pressure state, and a doctor is required to maintain the negative pressure state all the time during the operation, and a certain time is required to be maintained.
There are now some negative pressure syringes such as chinese patent CN213667135U: negative pressure syringe and chinese patent CN218187411U: a negative pressure syringe. Although the condition of maintaining negative pressure instead of manpower can be realized, the structure is relatively complex and the cost is high.
Disclosure of Invention
The invention aims to solve the technical problems that: the utility model provides a overcome prior art's is not enough, proposes a slider formula negative pressure syringe that takes out, and this slider formula negative pressure syringe draws appointed position body fluid and makes the relevant position be the negative pressure state after, can rely on self structure to accomplish the auto-lock, need not artifical handheld maintenance negative pressure state, safe and reliable, and simple structure easily operation.
The invention relates to a sliding block type negative pressure pumping injector, which comprises a needle cylinder main body, wherein a plunger rod is arranged in the needle cylinder main body, and the front end of the plunger rod is provided with a piston; a connecting rod deep groove is formed in the plunger rod along the axis direction of the plunger rod, a connecting rod is arranged in the connecting rod deep groove, the upper part of the connecting rod and the upper part of the connecting rod deep groove are in a step shape, and a spring is compressed between a shaft shoulder at the step of the connecting rod and a shaft shoulder at the step of the connecting rod deep groove; the lower part of the connecting rod is provided with an inclined through hole, an upper sliding hole is arranged on a plunger rod at one side of the connecting rod deep groove corresponding to the upper end of the inclined through hole, a lower sliding hole is arranged on a plunger rod at the other side of the connecting rod deep groove corresponding to the lower end of the inclined through hole, and the upper sliding hole and the lower sliding hole are respectively communicated with the inclined through hole; the inclined through hole is internally provided with an inclined sliding block, the top surface and the bottom surface of the inclined sliding block are respectively provided with an upper inclined surface and a lower inclined surface, and the upper inclined surface and the lower inclined surface are respectively matched with the top surface and the bottom surface of the inclined through hole; two ends of the inclined sliding block are respectively positioned in the upper sliding hole and the lower sliding hole.
The volume of the vacuum needed in the operation is judged in advance according to the actual condition before the operation, and then the injector with proper volume is selected. In the specific use process, firstly, the sealing element is arranged at the screw port at the front end of the syringe main body, and then the plunger rod is pulled to extract the liquid at the designated position; in the process of pulling the plunger rod upwards, the plunger rod carries a spring, a connecting rod and an inclined slide block to move upwards together, and in the process of moving upwards, the spring always has a trend of bouncing the connecting rod upwards, so that the connecting rod has a trend of moving upwards, the connecting rod can resist the lower inclined surface of the inclined slide block, the inclined slide block has a trend of moving downwards along the lower bottom surface of the inclined through hole, and the inclined slide block has a trend of moving downwards along the lower bottom surface of the inclined through hole, so that one end of the inclined slide block in the lower slide hole slides out of the lower slide hole into the syringe main body, but the inner wall of the syringe main body always limits the sliding out of one end of the inclined slide block; when the plunger rod is pulled up to the position that the lower sliding hole is completely positioned above the syringe main body, the spring upwards bounces the connecting rod, one end of the connecting rod upwards bounces to drive the inclined sliding block to slide out of the lower sliding hole, one end of the inclined sliding block sliding out of the lower sliding hole is abutted to the curled edge at the top end of the syringe main body, at the moment, the inclined sliding block and the syringe main body form locking, and when no other external force acts, the plunger rod cannot be pushed into the syringe main body any more. The upper inclined plane and the lower inclined plane of the inclined slide block are smooth surfaces.
When the operation is finished and the liquid in the syringe main body needs to be conveyed into the human body again, the top end of the connecting rod is pressed firstly, the connecting rod is stressed by downward force, the stress of the connecting rod is transmitted to the upper inclined surface of the inclined sliding block through the upper top surface of the inclined through hole, the connecting rod moves downwards to drive the inclined sliding block to retract and reset at first, when one end of the inclined sliding block sliding out of the lower sliding hole is completely retracted, the plunger rod is pushed simultaneously, and the plunger rod drives the connecting rod and the inclined sliding block to reenter the syringe main body until the liquid in the syringe main body is completely pushed out.
Preferably, one end of the bottom surface of the inclined sliding block positioned in the upper sliding hole is provided with a high supporting leg, the top end of the high supporting leg is fixedly integrated with the bottom surface of the inclined sliding block, and the bottom surface of the high supporting leg is supported on the bottom plane of the upper sliding hole. When the inclined sliding block slides out of the lower sliding hole for a certain length, the lower Fang Waibi of the connecting rod inclined through hole is clamped at one side of the high supporting leg, so that the inclined sliding block is prevented from excessively sliding out.
Preferably, the top surface of the inclined sliding block at the position corresponding to the high supporting leg is provided with an upper supporting plane. The high supporting leg and the upper supporting plane are respectively matched with the upper plane and the lower plane of the upper sliding hole to slide, so that the inclined sliding block is limited in rotation, and can only slide to one side, and finally a part of the inclined sliding block slides out of the lower sliding hole.
Preferably, a step plane is arranged at one end of the top surface of the inclined slide block, which is close to the lower slide hole, the step plane has a height difference with the upper inclined surface, and the step plane is matched with the top plane of the lower slide hole. One end of the bottom surface of the inclined sliding block, which is close to the lower sliding hole, is provided with a lower supporting plane. The step plane and the lower supporting plane are respectively matched with the upper plane and the lower plane of the lower sliding hole, so that the inclined sliding block can only slide left and right; and when the inclined slide block slides out of the lower slide hole for a certain length, the step shaft shoulder between the step plane and the upper inclined plane is clamped on the deep groove wall of the connecting rod above the lower slide hole, so that the inclined slide block is prevented from excessively sliding out.
Preferably, the upper inclined plane and the lower inclined plane of the inclined slide block are parallel; the upper top surface and the lower bottom surface of the inclined through hole are parallel.
Preferably, the upper inclined surface of the inclined sliding block and the upper top surface of the inclined through hole are provided with angle differences, and the lower inclined surface of the inclined sliding block and the lower bottom surface of the inclined through hole are provided with angle differences. The upper inclined surface inclination angle of the inclined sliding block is smaller than the inclined angle of the top surface of the inclined through hole, and the inclined sliding block is basically in point contact with the top surface and the bottom surface of the inclined through hole, so that the up-and-down movement of the operation connecting rod is more labor-saving.
Preferably, the angle difference is 1 ° -5 °.
Preferably, the bottom surface of the inclined sliding block in the lower sliding hole is provided with a notch, so that the notch is convenient to clamp the curled edge at the top end of the syringe main body.
Preferably, the upper top surface of the inclined through hole is provided with an isolation plane near one end of the lower sliding hole, and the width of the inclined section of the upper top surface of the inclined through hole is basically the same as the width of the isolation plane.
Compared with the prior art, the invention has the following beneficial effects:
the invention has simple structure and reasonable design, can finish self-locking by means of self structure after the body fluid at the designated position is extracted to make the corresponding position in a negative pressure state, does not need to be manually held to maintain the negative pressure state, is safe and reliable, and is easy to operate.
Drawings
FIG. 1 is a schematic view of a slider type negative pressure pump injector (in a ready-to-use state);
FIG. 2 is a schematic view of a slider type negative pressure pump injector (negative pressure pump state);
fig. 3 is a cross-sectional view of the plunger rod structure;
FIG. 4 is a cross-sectional view of a connecting rod structure;
FIG. 5 is a cross-sectional view of an angled slider;
FIG. 6 is a schematic view of a diagonal slider structure.
In the figure: 1. a syringe main body; 2. a plunger rod; 3. a connecting rod; 4. a spring; 5. an inclined through hole; 6. a slide-down hole; 7. a piston; 8. a connecting rod deep groove; 9. an upper slide hole; 10. an inclined slide block; 11. an isolation plane; 12. an upper support plane; 13. an upper inclined plane; 14. a stepped plane; 15. a notch; 16. a lower inclined plane; 17. a high leg; 18. and a lower support plane.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
1-6, the sliding block type negative pressure pumping injector of the invention comprises a syringe main body 1, wherein a plunger rod 2 is arranged in the syringe main body 1, and a piston 7 is arranged at the front end of the plunger rod 2; a connecting rod deep groove 8 is formed in the plunger rod 2 along the axis direction of the plunger rod, a connecting rod 3 is arranged in the connecting rod deep groove 8, the upper part of the connecting rod 3 and the upper part of the connecting rod deep groove 8 are in a step shape, and a spring 4 is compressed between a shaft shoulder at the step of the connecting rod 3 and a shaft shoulder at the step of the connecting rod deep groove 8; the lower part of the connecting rod 3 is provided with an inclined through hole 5, an upper sliding hole 9 is arranged on the plunger rod 2 at one side of the connecting rod deep groove 8 corresponding to the upper end of the inclined through hole 5, a lower sliding hole 6 is arranged on the plunger rod 2 at the other side of the connecting rod deep groove 8 corresponding to the lower end of the inclined through hole 5, and the upper sliding hole 9 and the lower sliding hole 6 are respectively communicated with the inclined through hole 5; the inclined through hole 5 is internally provided with an inclined slide block 10, the top surface and the bottom surface of the inclined slide block 10 are respectively provided with an upper inclined surface 13 and a lower inclined surface 16, and the upper inclined surface 13 and the lower inclined surface 16 are respectively matched with the top surface and the bottom surface of the inclined through hole 5; the two ends of the inclined slide block 10 are respectively positioned in the upper slide hole 9 and the lower slide hole 6.
In this embodiment:
one end of the bottom surface of the inclined slide block 10 positioned in the upper slide hole 9 is provided with a high support leg 17, the top end of the high support leg 17 is fixedly integrated with the bottom surface of the inclined slide block 10, and the bottom surface of the high support leg 17 is supported on the bottom plane of the upper slide hole 9. When the inclined slide block 10 slides out of the lower slide hole 6 for a certain length, the outer wall below the inclined through hole 5 of the connecting rod 3 is clamped on one side of the high supporting leg 17, so that the inclined slide block 10 is prevented from excessively sliding out.
The top surface of the inclined slide block 10 at the position corresponding to the high supporting leg 17 is provided with an upper supporting plane 12. The upper supporting leg 17 and the upper supporting plane 12 respectively slide in cooperation with the upper plane and the lower plane of the upper sliding hole 9 to limit the rotation of the inclined sliding block 10, so that the inclined sliding block 10 can slide to one side only and finally slide out of a part of the lower sliding hole 6.
The top surface of the inclined slide block 10 is provided with a step plane 14 near one end of the lower slide hole 6, the step plane 14 and the upper inclined plane 13 have a height difference, and the step plane 14 is matched with the top plane of the lower slide hole 6. The bottom surface of the inclined slide block 10 is provided with a lower supporting plane 18 near one end of the lower slide hole 6. The step plane 14 and the lower support plane 18 are respectively matched with the upper plane and the lower plane of the lower slide hole 6, so that the inclined slide block 10 can only slide left and right; and when the inclined slide block 10 slides out of the lower slide hole 6 for a certain length, the step shaft shoulder between the step plane 14 and the upper inclined plane 13 is clamped on the wall of the connecting rod deep groove 8 above the lower slide hole 6, so that the inclined slide block 10 is prevented from excessively sliding out.
The upper inclined surface 13 and the lower inclined surface 16 of the inclined slide block 10 are parallel; the upper top surface and the lower bottom surface of the inclined through hole 5 are parallel. The upper inclined surface 13 and the upper top surface of the inclined through hole 5 are provided with angle difference, and the lower inclined surface 16 of the inclined sliding block 10 and the lower bottom surface of the inclined through hole 5 are provided with angle difference. The upper inclined surface 13 of the inclined slide block 10 is smaller than the inclined angle of the top surface of the inclined through hole 5, and the inclined slide block 10 is basically in point contact with the top surface and the bottom surface of the inclined through hole 5, so that the up-and-down movement of the operation connecting rod 3 is more labor-saving. The angle difference α is 3 °, for example, the inclination angle of the inclined surface 13 on the inclined slider 10 is 45 °, and the inclination angle of the top surface of the inclined through hole 5 is 48 °.
The bottom surface of the inclined slide block 10 in the lower slide hole 6 is provided with a notch 15, which is convenient for the notch 15 to clamp the curled edge at the top end of the syringe main body.
An isolation plane 11 is arranged at one end, close to the lower slide hole 6, of the upper top surface of the inclined through hole 5, and the width of the inclined section of the upper top surface of the inclined through hole 5 is basically the same as that of the isolation plane 11.
The volume of the vacuum needed in the operation is judged in advance according to the actual condition before the operation, and then the injector with proper volume is selected. In the specific use process, firstly, a sealing element is arranged at the screw port at the front end of the syringe main body 1 to form a negative pressure condition with a human body, and then the plunger rod 2 is pulled to extract liquid at a designated position; in the process of pulling the plunger rod 2 upwards, the plunger rod 2 carries the spring 4, the connecting rod 3 and the inclined slide block 10 to move upwards together, and in the process of moving upwards, the spring 4 always has a trend of upwards bouncing the connecting rod 3, so that the connecting rod 3 has a trend of upwards moving, the connecting rod 3 can press the lower inclined surface 16 of the inclined slide block 10, so that the inclined slide block 10 has a trend of moving downwards along the lower bottom surface of the inclined through hole 5, and the inclined slide block 10 has a trend of moving along the lower bottom surface of the inclined through hole 5, so that one end of the inclined slide block 10 in the lower slide hole 6 slides out of the lower slide hole 6 into the syringe main body 1, but the inner wall of the syringe main body 1 always limits the sliding out of one end of the inclined slide block 10; when the plunger rod 2 is pulled up until the lower slide hole 6 is completely positioned above the syringe main body 1, the spring 4 upwards bounces the connecting rod 3, the connecting rod 3 upwards bounces to drive one end of the inclined slide block 10 to slide out of the lower slide hole 6, one end of the inclined slide block 10 sliding out of the lower slide hole 6 is abutted on the curled edge at the top end of the syringe main body 1, at the moment, the inclined slide block 10 and the syringe main body 1 form locking, and when no other external force acts, the plunger rod 2 cannot be pushed into the syringe main body 1 any more. The upper inclined surface 13 and the lower inclined surface 16 of the inclined slide block 10 are smooth surfaces.
When the operation is finished and the liquid in the syringe main body 1 needs to be conveyed into a human body again, the top end of the connecting rod 3 is pressed firstly, the connecting rod 3 is subjected to downward force, the force borne by the connecting rod 3 is transmitted to the upper inclined surface 13 of the inclined sliding block 10 through the upper top surface of the inclined through hole 5, the downward movement of the connecting rod 3 firstly drives the inclined sliding block 10 to retract and reset, when one end of the inclined sliding block 10 sliding out of the lower sliding hole 6 is completely retracted, the plunger rod 2 is pushed simultaneously, and the plunger rod 2 drives the connecting rod 3 and the inclined sliding block 10 to reenter the syringe main body 1 until the liquid in the syringe main body 1 is completely pushed out.
Claims (5)
1. The sliding block type negative pressure pumping injector comprises a needle cylinder main body (1), wherein a plunger rod (2) is arranged in the needle cylinder main body (1), and a piston (7) is arranged at the front end of the plunger rod (2); the method is characterized in that: a connecting rod deep groove (8) is formed in the plunger rod (2) along the axis direction of the plunger rod, a connecting rod (3) is arranged in the connecting rod deep groove (8), the upper part of the connecting rod (3) and the upper part of the connecting rod deep groove (8) are in a step shape, and a spring (4) is compressed between a shaft shoulder at the step position of the connecting rod (3) and a shaft shoulder at the step position of the connecting rod deep groove (8); the lower part of the connecting rod (3) is provided with an inclined through hole (5), an upper sliding hole (9) is arranged on the plunger rod (2) at one side of the connecting rod deep groove (8) corresponding to the upper end of the inclined through hole (5), a lower sliding hole (6) is arranged on the plunger rod (2) at the other side of the connecting rod deep groove (8) corresponding to the lower end of the inclined through hole (5), and the upper sliding hole (9) and the lower sliding hole (6) are respectively communicated with the inclined through hole (5); an inclined sliding block (10) is arranged in the inclined through hole (5), an upper inclined surface (13) and a lower inclined surface (16) are respectively arranged on the top surface and the bottom surface of the inclined sliding block (10), and the upper inclined surface (13) and the lower inclined surface (16) are respectively matched with the top surface and the bottom surface of the inclined through hole (5); two ends of the inclined sliding block (10) are respectively positioned in the upper sliding hole (9) and the lower sliding hole (6); one end of the bottom surface of the inclined sliding block (10) positioned in the upper sliding hole (9) is provided with a high supporting leg (17), the top end of the high supporting leg (17) is fixed with the bottom surface of the inclined sliding block (10) into a whole, and the bottom surface of the high supporting leg (17) is supported on the bottom plane of the upper sliding hole (9); the top surface of the inclined sliding block (10) at the position corresponding to the high supporting leg (17) is provided with an upper supporting plane (12); a step plane (14) is arranged at one end, close to the lower sliding hole (6), of the top surface of the inclined sliding block (10), the step plane (14) and the upper inclined plane (13) have a height difference, and the step plane (14) is matched with the top plane of the lower sliding hole (6); a lower supporting plane (18) is arranged at one end of the bottom surface of the inclined slide block (10) close to the lower slide hole (6); the bottom surface of the inclined sliding block (10) in the lower sliding hole (6) is provided with a notch (15).
2. The slider pump negative pressure syringe of claim 1, wherein: the upper inclined surface (13) and the lower inclined surface (16) of the inclined slide block (10) are parallel; the upper top surface and the lower bottom surface of the inclined through hole (5) are parallel.
3. The slider pump negative pressure syringe of claim 2, wherein: an angle difference is formed between the upper inclined surface (13) of the inclined sliding block (10) and the upper top surface of the inclined through hole (5), and an angle difference is formed between the lower inclined surface (16) of the inclined sliding block (10) and the lower bottom surface of the inclined through hole (5).
4. A slider pump negative pressure syringe according to claim 3, wherein: the angle difference is 1-5 degrees.
5. The slider pump negative pressure syringe of claim 1, wherein: an isolation plane (11) is arranged at one end of the upper top surface of the inclined through hole (5) close to the lower sliding hole (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310287591.4A CN115990303B (en) | 2023-03-23 | 2023-03-23 | Sliding block type negative pressure suction injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310287591.4A CN115990303B (en) | 2023-03-23 | 2023-03-23 | Sliding block type negative pressure suction injector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115990303A CN115990303A (en) | 2023-04-21 |
| CN115990303B true CN115990303B (en) | 2023-06-27 |
Family
ID=85995327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310287591.4A Active CN115990303B (en) | 2023-03-23 | 2023-03-23 | Sliding block type negative pressure suction injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115990303B (en) |
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|---|---|---|---|---|
| US5647515A (en) * | 1995-09-29 | 1997-07-15 | Zwijnenberg; Lambertus Herman | Stepping plunger for air-activated dispensing system |
| CN2615277Y (en) * | 2003-01-28 | 2004-05-12 | 李永生 | Securing device of lock |
| CN101484199A (en) * | 2006-06-30 | 2009-07-15 | 艾博特生物技术有限公司 | Automatic injection device |
| CN103908711A (en) * | 2014-04-14 | 2014-07-09 | 林新颖 | Puncture combined-type syringe |
| US8808252B1 (en) * | 2012-04-04 | 2014-08-19 | Kevin T. Fox | Syringe assembly |
| CN111281447A (en) * | 2020-03-30 | 2020-06-16 | 江苏伊凯医疗器械有限公司 | Endoluminal closure system for varicose veins of lower limbs |
| CN111603636A (en) * | 2020-05-13 | 2020-09-01 | 安徽宏宇五洲医疗器械股份有限公司 | Button type self-destruction syringe |
| CN216876434U (en) * | 2021-11-24 | 2022-07-05 | 杭州市红十字会医院 | Negative pressure suction injector for puncture |
| CN114732726A (en) * | 2022-04-14 | 2022-07-12 | 首都医科大学宣武医院 | Disposable sterile accurate automatic liquid suction and administration injection device |
| CN115177335A (en) * | 2022-07-25 | 2022-10-14 | 肖仁意 | Syringe for puncture |
| CN217697432U (en) * | 2022-05-11 | 2022-11-01 | 贝普医疗科技股份有限公司 | Negative pressure syringe |
-
2023
- 2023-03-23 CN CN202310287591.4A patent/CN115990303B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5647515A (en) * | 1995-09-29 | 1997-07-15 | Zwijnenberg; Lambertus Herman | Stepping plunger for air-activated dispensing system |
| CN2615277Y (en) * | 2003-01-28 | 2004-05-12 | 李永生 | Securing device of lock |
| CN101484199A (en) * | 2006-06-30 | 2009-07-15 | 艾博特生物技术有限公司 | Automatic injection device |
| US8808252B1 (en) * | 2012-04-04 | 2014-08-19 | Kevin T. Fox | Syringe assembly |
| CN103908711A (en) * | 2014-04-14 | 2014-07-09 | 林新颖 | Puncture combined-type syringe |
| CN111281447A (en) * | 2020-03-30 | 2020-06-16 | 江苏伊凯医疗器械有限公司 | Endoluminal closure system for varicose veins of lower limbs |
| CN111603636A (en) * | 2020-05-13 | 2020-09-01 | 安徽宏宇五洲医疗器械股份有限公司 | Button type self-destruction syringe |
| CN216876434U (en) * | 2021-11-24 | 2022-07-05 | 杭州市红十字会医院 | Negative pressure suction injector for puncture |
| CN114732726A (en) * | 2022-04-14 | 2022-07-12 | 首都医科大学宣武医院 | Disposable sterile accurate automatic liquid suction and administration injection device |
| CN217697432U (en) * | 2022-05-11 | 2022-11-01 | 贝普医疗科技股份有限公司 | Negative pressure syringe |
| CN115177335A (en) * | 2022-07-25 | 2022-10-14 | 肖仁意 | Syringe for puncture |
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| Publication number | Publication date |
|---|---|
| CN115990303A (en) | 2023-04-21 |
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