CN220833073U - Negative pressure puncture needle - Google Patents
Negative pressure puncture needle Download PDFInfo
- Publication number
- CN220833073U CN220833073U CN202321896992.1U CN202321896992U CN220833073U CN 220833073 U CN220833073 U CN 220833073U CN 202321896992 U CN202321896992 U CN 202321896992U CN 220833073 U CN220833073 U CN 220833073U
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- China
- Prior art keywords
- negative pressure
- sleeve seat
- cylinder
- pull rod
- needle
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- 238000010304 firing Methods 0.000 claims abstract description 17
- 238000005070 sampling Methods 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 abstract description 8
- 238000001179 sorption measurement Methods 0.000 abstract description 3
- 238000001574 biopsy Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 3
- 230000002380 cytological effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The utility model discloses a negative pressure puncture needle, which comprises a needle cylinder and a needle core arranged on the needle cylinder, and is characterized by further comprising an automatic negative pressure mechanism which is arranged on the needle cylinder and used for improving the sampling efficiency of the needle core, wherein the automatic negative pressure mechanism comprises a sleeve seat arranged on the needle cylinder, a pull rod which is arranged on the sleeve seat and forms negative pressure adsorption with the needle cylinder, and a firing assembly which is arranged on the sleeve seat and used for firing the pull rod, and a piston head is arranged on the pull rod; through the arrangement of the automatic negative pressure mechanism, the sampling dosage of the puncture needle is controlled by the moving stroke of the firing assembly, so that the sampling process is more convenient; meanwhile, the whole product is small and flexible, and is convenient for one-hand operation.
Description
Technical Field
The utility model relates to the technical field of medical treatment, in particular to a negative pressure puncture needle.
Background
Cytological biopsy is used as one of the common means of soft biopsy and is usually used at dangerous sites and sites with smaller target targets, but because the cytological biopsy sample is very small in sample taking quantity, the diameter of a puncture needle is very small, and the sampling process completely depends on the siphon effect of a needle tube to take a tiny tissue fluid mixture in the process of lifting and inserting, the sampling dosage is often not ideal, repeated sampling is needed, and more pain and secondary injury are caused to patients; in clinical cases, an injection needle cylinder is externally connected to a puncture biopsy needle, a certain negative pressure is extracted by the needle cylinder to sample, and a relatively large needle cylinder is arranged on the needle cylinder due to the small diameter of the puncture needle, so that the needle cylinder is difficult to accurately control the sampling dosage by hand in the sucking process, and meanwhile, the volume is enlarged due to the fact that the needle cylinder is externally connected, and the needle cylinder is inconvenient to operate by a single hand; it is necessary to provide a negative pressure lancet.
Disclosure of utility model
The utility model aims to solve the problems and provides a negative pressure puncture needle.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the automatic negative pressure mechanism comprises a sleeve seat arranged on the needle cylinder, a pull rod arranged on the sleeve seat and used for forming negative pressure adsorption with the needle cylinder, and a firing assembly arranged on the sleeve seat and used for firing the pull rod, wherein the sleeve seat is arranged on the needle cylinder, the pull rod is provided with a piston head.
Preferably, the firing assembly comprises a piston cylinder arranged on the sleeve seat and connected with the pull rod, a spring arranged on the pull rod and positioned between the sleeve seat and the piston cylinder, and a guide structure arranged on the sleeve seat and matched with the piston cylinder.
Preferably, the sleeve seat is also provided with a chute, one end of the chute is provided with a clamping groove and a limiting block, and the piston cylinder is provided with an elastic sheet matched with the chute.
Preferably, the elastic sheet is provided with a clamping block matched with the clamping groove, and the elastic sheet is also provided with a limiting groove which is mutually clamped with the limiting block.
Preferably, the limiting block and the clamping block are provided with inclined planes.
Preferably, the guiding structure comprises a guiding groove arranged on the sleeve seat and a guiding strip arranged on the piston cylinder and matched with the guiding groove.
Preferably, the sleeve seat is also provided with an arc-shaped sheet for firing the piston cylinder, and the arc-shaped sheet is provided with a bulge which is convenient for pressing by fingers.
The utility model has the beneficial effects that: through the arrangement of the automatic negative pressure mechanism, the sampling dosage of the puncture needle is controlled by the moving stroke of the firing assembly, so that the sampling process is more convenient; meanwhile, the whole product is small and flexible, and is convenient for one-hand operation;
Through the arrangement of the guide structure, when the piston cylinder pushes the piston cylinder to move under the action of the spring, the piston cylinder moves on the sleeve seat more stably by utilizing the matching of the guide groove and the guide strip;
Through the setting of arc piece, press gently protruding with the finger, can make the inward extrusion elastic piece of arc piece to make the fixture block break away from the draw-in groove fast, easy operation is convenient.
Drawings
FIG. 1 is a schematic view of the overall structure of the present utility model;
FIG. 2 is a schematic cross-sectional view of the present utility model;
FIG. 3 is an enlarged schematic view of the structure of the utility model at A;
FIG. 4 is an enlarged schematic view of the structure at B of the present utility model.
The marks in the figure are as follows: 1 needle cylinder, 11 needle core, 2 automatic negative pressure mechanism, 21 sleeve seat, 22 pull rod, 23 piston cylinder, 24 spring, 25 chute, 26 draw-in groove, 27 stopper, 28 elastic sheet, 29 fixture block, 30 limit groove, 31 inclined plane, 32 arc sheet, 33 bulge, 3 piston head, 41 guide slot, 42 guide strip.
Detailed Description
The negative pressure puncture needle according to the present utility model will be further described below by way of examples with reference to the accompanying drawings.
Referring to fig. 1 to 4, the utility model provides a negative pressure puncture needle, which comprises a needle cylinder 1 and a needle core 11 arranged on the needle cylinder 1, and is characterized by also comprising an automatic negative pressure mechanism 2 arranged on the needle cylinder 1 for improving the sampling efficiency of the needle core, wherein the automatic negative pressure mechanism 2 comprises a sleeve seat 21 arranged on the needle cylinder 1 through threaded connection, a pull rod 22 movably arranged on the sleeve seat 21 and forming negative pressure adsorption with the needle cylinder 1, and a firing assembly arranged on the sleeve seat 21 for firing the pull rod 22, and a piston head 3 is arranged on the pull rod 22; through the arrangement of the automatic negative pressure mechanism 2, the sampling dosage of the puncture needle is controlled by the moving stroke of the firing assembly, so that the sampling process is more convenient; meanwhile, the whole product is small and flexible, and is convenient for one-hand operation.
The firing assembly comprises a piston cylinder 23 which is slidably arranged on a sleeve seat 21 and is connected with a pull rod 22 through threads, a spring 24 which is arranged on the pull rod 22 and is positioned between the sleeve seat 21 and the piston cylinder 23, and a guide structure which is arranged on the sleeve seat 21 and is matched with the piston cylinder 23, wherein a chute 25 is further arranged on the sleeve seat 21, a clamping groove 26 and a limiting block 27 are arranged at one end of the chute 25, an elastic piece 28 which is matched with the chute 25 is arranged on the piston cylinder 23, a clamping block 29 which is matched with the clamping groove 26 is arranged on the elastic piece 28, a limiting groove 30 which is mutually clamped with the limiting block 27 is further arranged on the elastic piece 28, inclined planes 31 are respectively arranged on the limiting block 27 and the clamping block 29, an arc-shaped piece 32 which is used for firing the piston cylinder 23 is further arranged on the sleeve seat 21, and a protrusion 33 which is convenient for pressing fingers is arranged on the arc-shaped piece 32; through the arrangement of the arc-shaped sheet 32, the arc-shaped sheet 32 can inwards squeeze the elastic sheet 28 by slightly pressing the protrusion 33 with fingers, so that the clamping block 29 is quickly separated from the clamping groove 26, and the operation is simple and convenient; through the setting of inclined plane 31, make the elastic piece 28 remove in spout 25 in-process, avoid fixture block 29 and stopper 27 to block each other, play the effect of direction, make the elastic piece 28 cooperate more nimble between draw-in groove 26 and the stopper 27.
The guide structure comprises a guide groove 41 arranged on the sleeve seat 21 and a guide strip 42 arranged on the piston cylinder 23 and matched with the guide groove 41; by the arrangement of the guide structure, when the piston cylinder 23 pushes the piston cylinder 23 to move under the action of the spring 24, the piston cylinder 23 moves on the sleeve seat 21 more stably by the cooperation of the guide groove 41 and the guide strip 42.
When the utility model is used, firstly, the piston cylinder 23 is pressed into the sleeve seat 21 along the guide groove 41 by pressing the piston cylinder 23, in the extrusion process, the spring 24 is extruded to shrink the pull rod 22 to push the piston head 3 to discharge air in the needle cylinder 1 through the needle core 11, meanwhile, the clamping block 29 on the elastic sheet 28 is contacted with the inclined surface 31 on the limiting block 27, so that the elastic sheet 28 is extruded to incline inwards until the limiting block 27 does not extrude the clamping block 29 any more, the clamping block 29 falls into the clamping groove 26, and at the moment, the limiting block 27 falls on the limiting groove 30 to finish the feeding of the piston cylinder 23; then, the needle 11 is aligned with the target position of sampling, then the needle 11 is inserted into human tissue, the protrusion 33 is slightly pressed by fingers, the protrusion 33 drives the arc-shaped piece 32 to press the elastic piece 28 towards the inner side of the sleeve seat 21, the elastic piece 28 is pressed and drives the clamping block 29 to be separated from the clamping groove 26, when the clamping block 29 is completely separated from the clamping groove 26, the finger does not press the protrusion 33 any more, the spring 24 drives the piston cylinder 23 to move outwards along the guide groove 41 by means of resilience force, the piston cylinder 23 drives the pull rod 22 and the piston head 3 to move simultaneously when moving outwards, at this time, negative pressure is formed between the interior of the needle cylinder 1 and the piston head 3, the sampling mixture in the human tissue is collected in the needle cylinder 11, then the whole biopsy puncture needle is taken out of the human body, and the sampling mixture in the needle cylinder 11 is dripped on the detection piece by using the piston head 3 to press the air in the needle cylinder 1 by adopting the above-mentioned piston cylinder 23 to perform analysis and detection.
The above embodiments are illustrative of the present utility model, and not limiting, and any simple modifications of the present utility model fall within the scope of the present utility model.
Claims (7)
1. The utility model provides a negative pressure pjncture needle, includes cylinder (1) and sets up needle core (11) on cylinder (1), characterized by still including installing automatic negative pressure mechanism (2) that promote needle core sampling efficiency on cylinder (1), automatic negative pressure mechanism (2) including install sleeve seat (21) on cylinder (1), install on sleeve seat (21) and form negative pressure absorbing pull rod (22) and install the firing subassembly that is used for firing pull rod (22) on sleeve seat (21) between cylinder (1), pull rod (22) on install piston head (3).
2. A negative pressure lancet according to claim 1, wherein: the firing assembly comprises a piston cylinder (23) which is arranged on the sleeve seat (21) and connected with the pull rod (22), a spring (24) which is arranged on the pull rod (22) and positioned between the sleeve seat (21) and the piston cylinder (23), and a guide structure which is arranged on the sleeve seat (21) and matched with the piston cylinder (23).
3. A negative pressure lancet according to claim 2, wherein: the sleeve seat (21) on still be equipped with spout (25), spout (25) one end is equipped with draw-in groove (26) and stopper (27), piston cylinder (23) on be equipped with spout (25) matched with elastic sheet (28).
4. A negative pressure lancet according to claim 3, wherein: the elastic piece (28) is provided with a clamping block (29) matched with the clamping groove (26), and the elastic piece (28) is also provided with a limiting groove (30) which is mutually clamped with the limiting block (27).
5. The negative pressure lancet of claim 4, wherein: the limiting block (27) and the clamping block (29) are respectively provided with an inclined plane (31).
6. A negative pressure lancet according to claim 2, wherein: the guide structure comprises a guide groove (41) arranged on the sleeve seat (21) and a guide strip (42) arranged on the piston cylinder (23) and matched with the guide groove (41).
7. The negative pressure lancet of claim 6, wherein: the sleeve seat (21) is also provided with an arc-shaped sheet (32) for firing the piston cylinder (23), and the arc-shaped sheet (32) is provided with a bulge (33) which is convenient for fingers to press.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321896992.1U CN220833073U (en) | 2023-07-19 | 2023-07-19 | Negative pressure puncture needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321896992.1U CN220833073U (en) | 2023-07-19 | 2023-07-19 | Negative pressure puncture needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220833073U true CN220833073U (en) | 2024-04-26 |
Family
ID=90780194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321896992.1U Active CN220833073U (en) | 2023-07-19 | 2023-07-19 | Negative pressure puncture needle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220833073U (en) |
-
2023
- 2023-07-19 CN CN202321896992.1U patent/CN220833073U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |