CN211272890U - Needleless injector - Google Patents
Needleless injector Download PDFInfo
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- CN211272890U CN211272890U CN201920978451.0U CN201920978451U CN211272890U CN 211272890 U CN211272890 U CN 211272890U CN 201920978451 U CN201920978451 U CN 201920978451U CN 211272890 U CN211272890 U CN 211272890U
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- injection
- shell
- push rod
- main shell
- internal thread
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Abstract
The utility model discloses a needleless injector, in the utility model, the needleless injector comprises a shell, an injection head and a trigger device; the shell comprises a main shell body and a shell cover; the injection head comprises an injection tube, a piston and a first push rod; the injection pipe is provided with an injection hole, and a first external thread matched with the first internal thread is formed on the injection pipe; the main shell and the injection tube are fixedly connected through threads; the main shell is provided with a second external thread; a second internal thread matched with the second external thread is formed at one end of the shell cover, and a third external thread is formed on the shell cover; a second push rod is arranged in the main shell; the second push rod is sleeved with a first spring; the main shell is provided with a first through hole matched with the second push rod; and a trigger device is arranged at one end of the second internal thread far away from the shell cover. The injection head and the main shell are in a separable combination mode, so that the injection head can be independently replaced, and cross infection of diseases can be prevented; the spring is arranged for driving, the structure is simple, the operation is convenient, and the spring can be repeatedly used.
Description
Technical Field
The utility model relates to the field of medical equipment, in particular to a needleless injector.
Background
Needleless injection is a new injection technology, and is gradually applied to clinic in recent years. The technology is that a needle head is not used during medicine injection, a high-pressure jet principle is used, so that the liquid medicine forms a thin liquid flow and instantly penetrates through the skin to reach the subcutaneous part, and due to the change of the injection principle, the liquid medicine is dispersed and distributed in the subcutaneous part, the onset time is faster, and the medicine absorption rate is higher; thereby solving a series of problems caused by the fact that the needle head penetrates into the body in the traditional injection. No foreign matter enters the body except the medicine itself by the needleless injection. Therefore, the use of needleless injection technology will be referred to by many authorities as "a revolution in medical injection technology".
Most of the existing needleless injectors are complex in structure, difficult to manufacture and high in cost, and the injection head and the shell are of an integral structure, so that the injection head is difficult to replace, the material requirement on the injection head is high, and the cost is increased.
SUMMERY OF THE UTILITY MODEL
In view of the defects in the prior art, the technical problem to be solved by the present invention is to provide a needleless injector, aiming at simplifying the structure of the needleless injector, reducing the manufacturing difficulty and reducing the cost.
In order to achieve the above object, the present invention provides a needleless injector, which comprises a housing, an injector head, and a trigger device; the shell comprises a main shell body and a shell cover; one end of the main shell is provided with a first internal thread; the injection head comprises an injection tube, a piston and a first push rod; an injection hole is formed in the injection pipe, and a first external thread matched with the first internal thread of the main shell is formed at one end, far away from the injection hole, of the injection pipe; the main shell and the injection tube are fixedly connected through the first external thread and the first internal thread; a second external thread is formed at one end, far away from the first internal thread, of the main shell; a second internal thread matched with the second external thread of the main shell is formed at one end of the shell cover, and a third external thread is formed at one end of the shell cover, which is far away from the second internal thread; a second push rod is arranged in the main shell; the second push rod is sleeved with a first spring; a first through hole matched with the second push rod is formed at one end of the main shell, which is provided with a first internal thread; and the trigger device is arranged at one end of the second internal thread far away from the shell cover.
In the technical scheme, by arranging the injection head and the main shell to be in a separable combination mode, if the injection head is damaged, the injection head can be independently replaced, when in injection, the injection head is impacted and rubbed by high-speed and high-pressure jet flow, is quick in failure and is a consumable applied to a needleless injector, and the injection head is required to be frequently replaced in consideration of requirements on disinfection and pollution prevention, so that the injection head is favorable for preventing the pollution of medicines and the cross infection of diseases; the drive mode of the needleless injector is set to be spring drive, so that the needleless injector is simple in structure, convenient to operate, economical and reasonable, and can be repeatedly used.
In a specific embodiment, the trigger device comprises a sleeve, a pin, a hook and an injection button; a third internal thread matched with the third external thread of the main shell is formed at one end of the sleeve; the injection button is a step-shaped hollow cylinder; the pin shaft is formed in the injection button; the hook is connected with the injection button through the pin shaft; a second through hole matched with the smaller head of the stepped injection button is formed at one end, far away from the third internal thread, of the sleeve; the injection button is nested in the sleeve through the second through hole.
In the technical scheme, the connection mode of the shell and the trigger device is set as threaded connection, so that on one hand, the connection between the shell and the trigger device is firmer; on the other hand, the trigger device is convenient to install and replace.
In another specific embodiment, the trigger device further comprises a second spring, and the second spring is arranged on one side of the hook.
In the technical scheme, the second spring is arranged, so that the hook can automatically reset.
In a specific embodiment, the first push rod is connected with the piston in a non-detachable way; the piston is a convex top piston; the syringe is in the shape of a bullet.
In the technical scheme, the injection head is of the structure, so that the structure is simple and reasonable.
In a specific embodiment, a disc matched with the inner cavity of the main shell is formed at one end of the second push rod; the middle part of the second push rod is a cylinder with the diameter smaller than that of the inner cavity of the main shell; and a circular truncated cone with the maximum diameter equal to that of the cylinder is formed at one end, far away from the disc, of the second push rod.
In this technical scheme, through with the second push rod sets up to above-mentioned structure, simple structure is convenient for install on the one hand first spring, on the other hand be convenient for with the couple forms the cooperation.
In a specific embodiment, an outer diameter of the first spring is smaller than a diameter of the inner cavity of the main housing, and an inner diameter of the first spring is larger than a maximum diameter of the circular truncated cone of the second push rod.
In this technical scheme, through setting up first spring, be convenient for with first spring installation is in on the second push rod.
In a specific embodiment, a third through hole is formed in the housing cover, and the diameter of the third through hole is equal to the maximum diameter of the circular truncated cone of the second push rod and is smaller than the inner diameter of the first spring.
In this technical scheme, through setting up the through-hole, can be to its roof pressure effect of first spring.
In a specific embodiment, the end face of the housing cover is provided with a support.
In this technical solution, the pillar is provided for fixing the second spring.
The utility model has the advantages that: in the utility model, by arranging the injection head and the main shell to be a separable combination mode, if the injection head is damaged, the injection head can be independently replaced, when in injection, the injection head is impacted and rubbed by high-speed and high-pressure jet flow, the injection head is quick to lose efficacy and is a consumable applied by a needleless injector, and then the requirements of disinfection and pollution prevention are considered, the injection head is required to be frequently replaced, which is favorable for preventing the pollution of medicines and the cross infection of diseases; the drive mode of the needleless injector is set to be spring drive, so that the needleless injector is simple in structure, convenient to operate, economical and reasonable, and can be repeatedly used; compared with the traditional needle head injection, the needleless injector can be operated without special skill and skillful manipulation of needle insertion, and is very convenient for both the user and the self to inject.
Drawings
Fig. 1 is a schematic view of a needleless injector according to an embodiment of the present invention.
Detailed Description
The invention will be further explained with reference to the following figures and examples:
in an embodiment of the present invention, as shown in fig. 1, the needleless injector comprises a housing, an injector head 200, and a trigger device 300; the housing 100 includes a main housing 101 and a housing cover 102; a first internal thread is formed at one end of the main housing 101; the injection head 200 comprises an injection tube 201, a piston 202 and a first push rod 203; an injection hole 204 is formed in the injection pipe 201, and a first external thread matched with the first internal thread of the main shell 101 is formed at one end, far away from the injection hole 204, of the injection pipe 201; the main housing 101 and the injection tube 201 are fixedly connected through the first external thread and the first internal thread; a second external thread is formed at one end of the main shell 101, which is far away from the first internal thread; a second internal thread matched with the second external thread of the main shell 101 is formed at one end of the shell cover 102, and a third external thread is formed at one end of the shell cover 102 far away from the second internal thread; a second push rod 400 is arranged in the main shell 101; the second push rod 400 is sleeved with a first spring 500; a first through hole matched with the second push rod 400 is formed at one end of the main shell 101, where a first internal thread is formed; the trigger device 300 is installed at one end of the second internal thread far away from the cover 102.
In this embodiment, the trigger 300 includes a sleeve 301, a pin 302, a hook 303, and an injection button 304; a third internal thread matched with the third external thread of the main shell 101 is formed at one end of the sleeve 301; the injection button 304 is a stepped hollow cylinder; the pin 302 is formed within the injection button 304; the hook 303 is connected with the injection button 304 through the pin 302; the sleeve 301 is away from the matching second through hole; the injection button 304 is nested in the sleeve 301 through the second through hole.
In another embodiment, the triggering device 300 further comprises a second spring 600, and the second spring 600 is installed at one side of the hook 303.
In this embodiment, the first push rod 203 is connected to the piston 202 in a non-detachable manner; the piston 202 is a convex-top piston 202; the syringe 201 is shaped as a bullet.
In this embodiment, a disc matching with the inner cavity of the main housing 101 is formed at one end of the second push rod 400; the middle part of the second push rod 400 is a cylinder with the diameter smaller than that of the inner cavity of the main shell 101; one end of the second push rod 400, which is far away from the disc, is formed with a circular truncated cone with the maximum diameter equal to that of the cylinder.
In this embodiment, the outer diameter of the first spring 500 is smaller than the diameter of the inner cavity of the main housing 101, and the inner diameter of the first spring 500 is larger than the maximum diameter of the circular truncated cone of the second push rod 400.
In this embodiment, a third through hole is formed in the housing cover 102, and a diameter of the third through hole is equal to a maximum diameter of the circular truncated cone of the second push rod 400 and is smaller than an inner diameter of the first spring 500.
In this embodiment, the end surface of the cover 102 is provided with a post 103.
In this embodiment, before use, the syringe 200 is filled with a liquid medicine by an external liquid medicine filling device, the second plunger 400 is reset by an external reset device, the needleless syringe can be used after preparation, and the syringe 200 can be sterilized if necessary; when the needleless injector is used, the injection head 200 is only aligned with a part to be injected, and the injection button 304 is pressed; compared with the traditional needle head injection, the needleless injector can be operated without special skill and skillful manipulation of needle insertion, and is very convenient for both the user and the self to inject.
Specific embodiments of the present invention have been described above in detail. It is to be understood that the specific embodiments of the invention are not exclusive and that numerous modifications and variations may be made by those skilled in the art in light of the teaching of the present invention within the scope of the appended claims. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the embodiments of the present invention should be within the scope of protection defined by the claims.
Claims (8)
1. A needleless injector, comprising: the needleless injector comprises a shell, an injection head and a trigger device; the shell comprises a main shell body and a shell cover; one end of the main shell is provided with a first internal thread; the injection head comprises an injection tube, a piston and a first push rod; an injection hole is formed in the injection pipe, and a first external thread matched with the first internal thread of the main shell is formed at one end, far away from the injection hole, of the injection pipe; the main shell and the injection tube are fixedly connected through the first external thread and the first internal thread; a second external thread is formed at one end, far away from the first internal thread, of the main shell; a second internal thread matched with the second external thread of the main shell is formed at one end of the shell cover, and a third external thread is formed at one end of the shell cover, which is far away from the second internal thread; a second push rod is arranged in the main shell; the second push rod is sleeved with a first spring; a first through hole matched with the second push rod is formed at one end of the main shell, which is provided with a first internal thread; and the trigger device is arranged at one end of the second internal thread far away from the shell cover.
2. The needle free injector of claim 1, wherein: the trigger device comprises a sleeve, a pin shaft, a hook and an injection button; a third internal thread matched with the third external thread of the main shell is formed at one end of the sleeve; the injection button is a step-shaped hollow cylinder; the pin shaft is formed in the injection button; the hook is connected with the injection button through the pin shaft; a second through hole matched with the smaller head of the stepped injection button is formed at one end, far away from the third internal thread, of the sleeve; the injection button is nested in the sleeve through the second through hole.
3. A needleless injector as in claim 2 wherein: the trigger device also comprises a second spring, and the second spring is arranged on one side of the hook.
4. The needle free injector of claim 1, wherein: the first push rod is connected with the piston in a non-detachable mode; the piston is a convex top piston; the syringe is in the shape of a bullet.
5. The needle free injector of claim 1, wherein: a disc matched with the inner cavity of the main shell is formed at one end of the second push rod; the middle part of the second push rod is a cylinder with the diameter smaller than that of the inner cavity of the main shell; and a circular truncated cone with the maximum diameter equal to that of the cylinder is formed at one end, far away from the disc, of the second push rod.
6. The needle free injector of claim 5, wherein: the outer diameter of the first spring is smaller than the diameter of the inner cavity of the main shell, and the inner diameter of the first spring is larger than the maximum diameter of the circular truncated cone of the second push rod.
7. The needle free injector of claim 5, wherein: and a third through hole is formed in the shell cover, and the diameter of the third through hole is equal to the maximum diameter of the circular truncated cone of the second push rod and is smaller than the inner diameter of the first spring.
8. The needle free injector of claim 1, wherein: and the end surface of the shell cover is provided with a support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920978451.0U CN211272890U (en) | 2019-06-27 | 2019-06-27 | Needleless injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920978451.0U CN211272890U (en) | 2019-06-27 | 2019-06-27 | Needleless injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211272890U true CN211272890U (en) | 2020-08-18 |
Family
ID=72027014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920978451.0U Expired - Fee Related CN211272890U (en) | 2019-06-27 | 2019-06-27 | Needleless injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211272890U (en) |
-
2019
- 2019-06-27 CN CN201920978451.0U patent/CN211272890U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200818 Termination date: 20210627 |
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| CF01 | Termination of patent right due to non-payment of annual fee |