CN216877459U - Stable form needleless injector - Google Patents
Stable form needleless injector Download PDFInfo
- Publication number
- CN216877459U CN216877459U CN202122558518.5U CN202122558518U CN216877459U CN 216877459 U CN216877459 U CN 216877459U CN 202122558518 U CN202122558518 U CN 202122558518U CN 216877459 U CN216877459 U CN 216877459U
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- piston
- cavity
- reset
- cylinder barrel
- hole
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- 238000007789 sealing Methods 0.000 claims abstract description 35
- 239000003814 drug Substances 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 238000010304 firing Methods 0.000 claims description 8
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 238000009527 percussion Methods 0.000 description 6
- 238000004146 energy storage Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 2
- 238000007920 subcutaneous administration Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000002615 epidermis Anatomy 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model relates to the technical field of medical equipment, in particular to a stable needleless injector, which comprises: the shell is provided with an inner cavity and an exhaust hole, a cylinder barrel is arranged in the inner cavity, and the front end of the cylinder barrel is provided with a reset air inlet hole and a reset air outlet hole; a barrel assembly; the piston is slidably arranged in the cylinder barrel, a push rod used for pushing liquid medicine in the gun barrel assembly is connected to the piston in a transmission mode, the piston divides the interior of the cylinder barrel into a rodless cavity and a rod cavity, and the rod cavity is communicated with the exhaust hole; the reset air inlet hole and the reset air outlet hole are communicated with the reset cavity; a balance valve having a valve core and an elastic element; the front end surface of the piston is provided with a sealing piece; after the piston is fired, the sealing element is contacted with the front end surface of the inner cavity of the shell to separate the exhaust hole from the reset cavity, and the sealing element is arranged on the piston, so that the sealing element is extruded only during use, the service life of the needle-free injector is greatly prolonged, and the stable operation of the needle-free injector is ensured.
Description
Technical Field
The utility model relates to the technical field of medical equipment, in particular to a stable needleless injector.
Background
With the development of science and technology, China becomes one of the few countries capable of producing needleless injectors all over the world, and the needleless injectors complete the hypodermic injection of liquid medicine by utilizing the pressure jet principle, namely, the liquid medicine in a medicine tube is pushed to form a superfine liquid medicine column through micropores by pressure generated by a pressure device in the needleless injectors, so that the liquid medicine instantly penetrates through the epidermis of a human body to reach the subcutaneous part, and the liquid medicine is absorbed in a dispersed manner with the diameter of 3-5 cm under the subcutaneous part.
Chinese patent application number is CN202110240947.X, the patent name is a needleless injector, it installs sealed the front end tip at the inner chamber of casing with sealed, and sealed end is located between the front end tip of the inner chamber of casing and the preceding terminal surface of cylinder, before the piston percussion and after the piston percussion, the percussion subassembly all makes the case of balanced valve support the rear end face of cylinder, the preceding terminal surface of cylinder supports sealed the pad this moment, sealed pad has born and has easily leaded to the deformation after the extrusion of cylinder, thereby make its leakproofness decline, can't cut off exhaust hole and reset chamber, the unable gas storage of reset chamber leads to the unable piston that resets after the percussion again.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is as follows: in order to overcome the problems that in the prior art, a sealing gasket is easy to deform after being extruded by a cylinder barrel, so that the sealing degree of the sealing gasket is reduced, an exhaust hole and a reset cavity cannot be separated, and a piston cannot be reset, the stable needleless injector is provided.
The technical scheme adopted by the utility model for solving the technical problem is as follows: a stable, needleless injector comprising:
the shell is provided with an inner cavity and an exhaust hole, a cylinder barrel is arranged in the inner cavity, and a reset air inlet hole and a reset air outlet hole are formed in the front end of the cylinder barrel;
the gun barrel assembly is used for placing liquid medicine;
the piston is slidably arranged in the cylinder barrel, a push rod used for pushing liquid medicine in the gun barrel assembly is connected to the piston in a transmission mode, the piston divides the interior of the cylinder barrel into a rodless cavity and a rod cavity, the push rod and the rod cavity are located on the same side of the piston, and the rod cavity is communicated with the exhaust hole;
the reset air inlet hole and the reset air outlet hole are communicated with the reset cavity, the reset air outlet hole is positioned on the front side of the reset air inlet hole, and the reset air outlet hole is positioned on the front side of the piston after the piston is fired;
the balance valve is provided with a valve core and an elastic element for enabling the valve core to abut against the end part of the cylinder barrel;
the trigger assembly is used for providing power for the valve core to abut against the end part of the cylinder barrel, when the trigger assembly stops providing power for the balance valve, the valve core is far away from the end part of the cylinder barrel, and gas enters the rodless cavity to push the piston to form trigger;
a sealing element is arranged on the front end face of the piston;
after the piston is fired, the sealing element is contacted with the front end surface of the inner cavity of the shell to separate the exhaust hole from the reset cavity, and the sealing element is arranged on the piston, so that the sealing element is extruded only during use, the service life of the needle-free injector is greatly prolonged, and the stable operation of the needle-free injector is ensured.
In order to solve the problem that the contact degree of the front end face of the inner cavity of the sealing element and the shell is not enough, the sealing element further comprises a convex block which protrudes from the front end face of the inner cavity of the shell, after the piston is triggered, the exhaust hole and the reset cavity are separated by the contact of the sealing element and the convex block, and the contact degree of the front end face of the inner cavity of the sealing element and the shell can be achieved through the convex block, so that the sealing property is improved, and the separation between the reset cavity and the exhaust hole is further ensured.
Further comprising the seal being a gasket.
The utility model has the beneficial effects that: according to the stable needleless injector provided by the utility model, the sealing element is arranged on the piston, so that the sealing element is extruded only during use, the service life of the stable needleless injector is greatly prolonged, and the stable operation of the needleless injector is ensured.
Drawings
The utility model is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional structural view of the present invention;
FIG. 3 is a schematic view of a cross-sectional three-dimensional structure of the present invention;
FIG. 4 is a schematic structural view showing the state of the partition vent hole and the reset cavity according to the present invention;
fig. 5 is an enlarged schematic view of the utility model at a in fig. 4.
In the figure: 1. the automatic balance valve comprises a shell, 101, an exhaust hole, 102, a lug, 2, a cylinder barrel, 201, a reset air inlet hole, 202, a reset air outlet hole, 203, a rodless cavity, 204, a rod cavity, 3, a barrel component, 4, a piston, 401, a sealing piece, 5, a push rod, 6, a reset cavity, 7, a balance valve, 701, a valve core, 702, an elastic element, 8, a firing component, 801, an air supply cavity, 802, an energy storage cavity, 803, a control cavity, 804 and a control valve.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
Referring to fig. 1, which is a schematic structural view of the present invention, a stabilized needleless injector comprises:
the device comprises a shell 1, a first air inlet and a second air outlet, wherein the shell 1 is provided with an inner cavity and an air outlet 101, a cylinder barrel 2 is arranged in the inner cavity, and a reset air inlet 201 and a reset air outlet 202 are arranged at the front end of the cylinder barrel 2;
the gun barrel component 3 is used for placing liquid medicine;
the piston 4 is slidably arranged in the cylinder barrel 2, a push rod 5 used for pushing the liquid medicine in the barrel component 3 is connected to the piston 4 in a transmission manner, the piston 4 divides the interior of the cylinder barrel 2 into a rodless cavity 203 and a rod cavity 204, the push rod 5 and the rod cavity 204 are both positioned on the same side of the piston 4, and the rod cavity 204 is communicated with the exhaust hole 101;
the reset cavity 6, the reset air inlet hole 201 and the reset air outlet hole 202 are communicated with the reset cavity 6, the reset air outlet hole 202 is positioned on the front side of the reset air inlet hole 201, and when the piston 4 is fired, the reset air outlet hole 202 is positioned on the front side of the piston 4;
a balance valve 7 having a spool 701 and an elastic member 702 for urging the spool 701 against an end of the cylinder 2;
and a firing assembly 8 for providing power for the valve core 701 to abut against the end of the cylinder 2, when the firing assembly 8 stops providing power for the balance valve 7, the valve core 701 is far away from the end of the cylinder 2, gas enters the rodless cavity 203 to push the piston 4 to form firing,
as shown in fig. 2 and 3, the firing assembly 8 includes an air supply chamber 801, an energy storage chamber 802 communicated with the air supply chamber 801, a control chamber 803 communicated with the air supply chamber 801, and a control valve 804, wherein the energy storage chamber 802 and the control chamber 803 are respectively located at two sides of the valve core 701, the control valve 804 is arranged on a connecting flow path between the control chamber 803 and the air supply chamber 801, the control valve 804 has a first state and a second state, in the first state, the connecting flow path is communicated, the control valve 804 allows air in the air supply chamber 801 to enter the control chamber 803, and the valve core 701 is held against the end of the cylinder 2;
as shown in fig. 4 and 5, in the second state, the connection flow path is cut off, the control valve 804 prevents the gas in the gas supply cavity 801 from entering the control cavity 803, and the control cavity 803 is exhausted outwards, at this time, the gas in the energy storage cavity 802 pushes the valve core to be away from the cylinder and enter the cylinder, so as to push the piston 4 to form a percussion, the front end surface of the inner cavity of the housing 1 is in contact with the sealing element 401 after the percussion, and therefore, at this time, the compressed gas in the reset cavity 6 cannot leak to the outside through the exhaust hole 101;
a sealing element 401 is arranged on the front end face of the piston 4, and the sealing element 401 is a sealing gasket;
as shown in fig. 4 and 5, after the piston 4 is fired, the sealing element 401 contacts with the front end surface of the inner cavity of the shell 1 to separate the exhaust hole 101 from the reset cavity 6, and the sealing element 401 is installed on the piston 4, so that the sealing element 401 is extruded only during use, the service life of the needle-free injector is greatly prolonged, and the stable operation of the needle-free injector is ensured.
As shown in fig. 4 and 5, a projection 102 protrudes from the front end surface of the inner cavity of the housing 1, when the piston 4 is fired, the sealing element 401 contacts with the projection 102 to separate the exhaust hole 101 from the reset cavity 6, and the contact degree between the sealing element and the front end surface of the inner cavity of the housing can be achieved through the projection, so that the sealing performance is improved, the separation between the reset cavity 6 and the exhaust hole 101 is further ensured, and the sealing element 401 and the projection 102 are both arranged around the exhaust hole 101.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations can be made by the worker in the light of the above teachings without departing from the spirit of the utility model. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (3)
1. A stabilized needleless injector, comprising:
the air conditioner comprises a shell (1) and a control device, wherein the shell is provided with an inner cavity and an exhaust hole (101), a cylinder barrel (2) is installed in the inner cavity, and a reset air inlet hole (201) and a reset air outlet hole (202) are formed in the front end of the cylinder barrel (2);
the gun barrel assembly (3) is used for placing liquid medicine;
the piston (4) is slidably arranged in the cylinder barrel (2), a push rod (5) used for pushing liquid medicine in the barrel component (3) is connected to the piston (4) in a transmission mode, the piston (4) divides the interior of the cylinder barrel (2) into a rodless cavity (203) and a rod cavity (204), the push rod (5) and the rod cavity (204) are located on the same side of the piston (4), and the rod cavity (204) is communicated with the exhaust hole (101);
the reset cavity (6), the reset air inlet hole (201) and the reset air outlet hole (202) are communicated with the reset cavity (6), the reset air outlet hole (202) is positioned on the front side of the reset air inlet hole (201), and when the piston (4) is fired, the reset air outlet hole (202) is positioned on the front side of the piston (4);
a balance valve (7) having a valve element (701) and an elastic element (702) for urging the valve element (701) against the end of the cylinder (2);
the firing assembly (8) is used for providing power for the valve core (701) to abut against the end part of the cylinder barrel (2), when the firing assembly (8) stops providing power for the balance valve (7), the valve core (701) is far away from the end part of the cylinder barrel (2), and gas enters the rodless cavity (203) to push the piston (4) to form firing;
the piston is characterized in that a sealing piece (401) is arranged on the front end face of the piston (4);
when the piston (4) is fired, the sealing piece (401) is contacted with the front end surface of the inner cavity of the shell (1) to separate the exhaust hole (101) from the reset cavity (6).
2. A stable, needleless syringe as in claim 1 wherein: a lug (102) protrudes from the front end face of the inner cavity of the shell (1), and when the piston (4) is fired, the sealing element (401) is in contact with the lug (102) to separate the exhaust hole (101) from the reset cavity (6).
3. A stabilized needleless injector as in claim 1 wherein: the sealing element (401) is a sealing gasket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122558518.5U CN216877459U (en) | 2021-10-22 | 2021-10-22 | Stable form needleless injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122558518.5U CN216877459U (en) | 2021-10-22 | 2021-10-22 | Stable form needleless injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216877459U true CN216877459U (en) | 2022-07-05 |
Family
ID=82194349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122558518.5U Active CN216877459U (en) | 2021-10-22 | 2021-10-22 | Stable form needleless injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216877459U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112998900A (en) * | 2021-03-04 | 2021-06-22 | 泰州起点医疗科技有限公司 | Needleless injector |
-
2021
- 2021-10-22 CN CN202122558518.5U patent/CN216877459U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112998900A (en) * | 2021-03-04 | 2021-06-22 | 泰州起点医疗科技有限公司 | Needleless injector |
| CN112998900B (en) * | 2021-03-04 | 2025-07-15 | 江阴市机电技术有限公司 | A needle-free syringe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230607 Address after: Floor 8, Building 1, No. 22 Xiushui Road, Medical High tech Industrial Development Zone, Taizhou City, Jiangsu Province, 225300 Patentee after: Jiangsu Leju Pharmaceutical Technology Co.,Ltd. Address before: 225300 floors 8-9, building 1, No. 22, Xiushui Road, Taizhou pharmaceutical high tech Zone, Taizhou City, Jiangsu Province Patentee before: Jiangsu yimingrong pharmaceutical medical technology Co.,Ltd. |