CN106975126B - Injection device - Google Patents
Injection device Download PDFInfo
- Publication number
- CN106975126B CN106975126B CN201710308535.9A CN201710308535A CN106975126B CN 106975126 B CN106975126 B CN 106975126B CN 201710308535 A CN201710308535 A CN 201710308535A CN 106975126 B CN106975126 B CN 106975126B
- Authority
- CN
- China
- Prior art keywords
- piston
- sleeve
- medicament
- medicament tube
- push rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000002347 injection Methods 0.000 title claims abstract description 37
- 239000007924 injection Substances 0.000 title claims abstract description 37
- 239000003814 drug Substances 0.000 claims abstract description 90
- 230000007547 defect Effects 0.000 abstract description 3
- 230000006978 adaptation Effects 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 206010011409 Cross infection Diseases 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 206010029803 Nosocomial infection Diseases 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/50—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile
Landscapes
- Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention discloses an injection device, which comprises a medicament tube for containing medicaments, a piston for pushing the medicaments, a sleeve and a push rod, wherein a needle is arranged at the head end of the medicament tube, the piston is arranged at the tail end of the medicament tube, the piston can move from the tail end to the head end in the medicament tube to push the medicaments, the sleeve and the push rod are arranged at the tail end of the sleeve, the medicament tube is detachably arranged in the sleeve, the push rod can move along the extending direction of the medicament tube, and the head end of the push rod is propped against the end face of the tail end of the piston. After the injection device is used, the medicament tube is automatically scrapped without artificial deliberate damage, so that the defects caused by participation of human factors are avoided, the repeated use of the injection device is avoided, the structure of the medicament tube is simplified, and the cost is saved.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to an injection device.
Background
In order to avoid cross-infection when a human or animal inputs or removes media, the hypodermic syringe must be disposable and disposed of as waste after use. The most commonly used disposable syringes at present consist of a hollow cylinder, a needle, and a stopper and a piston rod which are assembled in the cylinder. The biggest problem with such syringes is that after injection, the needle is intact and the syringe body, the piston and the piston rod connecting the piston are also intact and thus still reusable. Thus, there is a problem in that the syringe is reused, resulting in a safety problem.
Therefore, how to provide an injection device that can be reused is a technical problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide an injection device which can prevent repeated use and improve safety.
In order to solve the technical problems, the invention provides an injection device, which comprises a medicament tube for containing medicaments and a piston for pushing the medicaments, wherein a needle is arranged at the head end of the medicament tube, the piston is arranged at the tail end of the medicament tube, the piston can move from the tail end to the head end in the medicament tube to push the medicaments, the injection device further comprises a sleeve and a push rod arranged at the tail end of the sleeve, the medicament tube is detachably arranged in the sleeve, the push rod can move along the extending direction of the medicament tube, and the head end of the push rod abuts against the tail end face of the piston.
Preferably, the periphery of the piston is provided with an annular bulge, the inner side wall of the head end of the medicament tube is provided with an annular groove, and the annular groove can be clamped with the annular bulge to limit the piston to retract.
Preferably, the outer periphery of the piston is provided with a plurality of annular protrusions in sequence along the axial direction.
Preferably, the piston is specifically a rubber piston, and a recess is formed in the middle of the end face of the tail end of the rubber piston.
Preferably, the needle is arranged at the edge of the end face of the head end of the medicament tube.
Preferably, the side surface of the sleeve is provided with an opening for the medicament tube to enter and exit, the head end of the sleeve is provided with an avoidance groove for avoiding the needle, and the tail end of the sleeve is provided with a side lug.
Preferably, the tail end of the sleeve is provided with a guide block, the middle part of the guide block is provided with a through hole matched with the push rod, and the push rod is installed in the through hole.
Preferably, the head end of the push rod is clamped with a push rod head.
Preferably, a fixing buckle for fixing the medicament tube is arranged on the periphery of the sleeve.
Preferably, an internal thread is arranged on the inner side of the tail end of the sleeve, and an external thread matched with the internal thread is arranged on the outer side of the tail end of the medicament tube.
The invention provides an injection device which comprises a medicament tube for containing medicaments, a piston for pushing the medicaments, a needle head arranged at the head end of the medicament tube, a sleeve and a push rod arranged at the tail end of the sleeve, wherein the piston is arranged at the tail end of the medicament tube and can move from the tail end to the head end in the medicament tube to push the medicaments. During injection, the medicament tube filled with the medicament is installed in the sleeve, the push rod is pushed to push the piston to move from the tail end of the medicament tube to the head end, so that the medicament pushing is realized, the push rod is propped against the piston and is not connected, the push rod can only push the piston to the head end of the medicament tube, when the push rod is withdrawn, the piston can be left at the head end of the medicament tube and cannot retract, the medicament tube is automatically scrapped after use, no artificial deliberate damage is needed, the defect caused by human factor participation is avoided, the repeated use of the injection device is avoided, the structure of the medicament tube is simplified, and the cost is saved.
Drawings
FIG. 1 is a schematic view of an embodiment of an injection device according to the present invention;
FIG. 2 is a schematic view of a drug tube in an embodiment of an injection device according to the present invention;
fig. 3 is a schematic view of the structure of a cannula in an embodiment of the injection device according to the present invention.
Detailed Description
The core of the invention is to provide an injection device which can prevent repeated use and improve the safety.
In order to better understand the aspects of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.
Referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of an embodiment of an injection device according to the present invention; FIG. 2 is a schematic view of a drug tube in an embodiment of an injection device according to the present invention; fig. 3 is a schematic view of the structure of a cannula in an embodiment of the injection device according to the present invention.
The embodiment of the invention provides an injection device, which comprises a medicament tube 1 and a sleeve 5, wherein the medicament tube 1 is used for containing medicament, the tail end of the medicament tube is provided with a piston 2, the head end of the medicament tube is provided with a needle, and the piston 2 can move from the tail end to the head end in the medicament tube 1 so as to push the medicament. The push rod 3 is installed to sleeve pipe 5 tail end, and medicament pipe 1 detachably installs in sleeve pipe 5, and push rod 3 can follow the extending direction of medicament pipe 1 and remove, and the head end of push rod 3 offsets with the tail end terminal surface of piston 2. Wherein the head end of each component is one end close to the needle head, and the tail end is one end far away from the needle head.
During injection, the medicament tube 1 filled with medicament is installed in the sleeve 5, the push rod 3 is pushed to push the piston 2 to move from the tail end of the medicament tube 1 to the head end, medicament pushing is achieved, the push rod 3 is propped against the piston 2 and is not connected, so that the push rod 3 can only push the piston 2 to the head end of the medicament tube 1, when the push rod 3 is withdrawn, the piston 2 can be left at the head end of the medicament tube 1 and cannot retract, the medicament tube 1 is automatically scrapped after use, artificial deliberate damage is not needed, the defect caused by human factor participation is avoided, the repeated use of the injection device is avoided, the structure of the medicament tube is simplified, and cost is saved only by replacing the medicament tube 1 during injection.
In the injection device provided by the specific embodiment of the invention, the periphery of the piston 2 is provided with an annular bulge, the inner side wall of the head end of the medicament tube 1 is provided with an annular groove, and the annular groove can be clamped with the annular bulge to limit the retraction of the piston 2. Specifically, the outer periphery of the piston 2 is provided with a plurality of annular projections in order in the axial direction, such as two annular projections. When the piston 2 is pushed to the head end of the medicament tube 1, the piston is blocked by the annular protrusion and the annular groove, and the return is prevented. The number and the shape of the annular protrusions and the annular grooves can be adjusted according to the situation, and the annular protrusions and the annular grooves are all within the protection scope of the invention.
The piston 2 may be a rubber piston, and a recess is formed in the middle of the end face of the tail end of the rubber piston. The medicament can be injected from the concave position in the middle of the rubber piston by a common injector according to the requirement; liquid medicine can also be filled into the small hole of the connecting part of the medicament tube 1 and the needle head; the medicine tube 1 can also be directly used as a medicine bottle, and a medicine factory can directly pour liquid medicine into the medicine tube 1, so that the using amount of the medicine bottle is reduced.
In order to further improve the safety, a needle may be provided at the edge of the front end face of the cartridge 1. When the piston 2 is pushed back through the needle head position, the piston 2 cannot be pushed back due to uneven stress due to the fact that the stress points are located at the edges of the piston, and repeated use is further avoided.
On the basis of the injection device provided by the above specific embodiments, the side surface of the sleeve 5 is provided with an opening for the medicament tube 1 to enter and exit, the head end of the sleeve 5 is provided with an avoidance groove for avoiding the needle, the tail end of the sleeve 5 is provided with a side ear, and the medicament tube 1 is convenient to mount and dismount. The guide block 4 is arranged at the tail end of the sleeve 5, a through hole matched with the push rod 3 is formed in the middle of the guide block 4, the push rod 3 is arranged in the through hole, smooth movement of the push rod 3 is guaranteed, and the guide block 4 can be integrally arranged with the sleeve 5 or can be split. The push rod head 6 can be clamped at the head end of the push rod 3, and the push rod head 6 is propped against the piston 2, so that the push rod 3 can be conveniently detached and installed.
In order to ensure the stability of injection, a fixing buckle 7 for fixing the medicament tube 1 can be arranged on the periphery of the sleeve 5, so that the sleeve 5 and the medicament tube 1 are relatively fixed during injection or are directly fixed through bayonet connection. The inner side of the tail end of the sleeve 5 is provided with an inner thread, and the outer side of the tail end of the medicament tube 1 is provided with an outer thread matched with the inner thread.
The injection device provided by the invention is described in detail above. The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
Claims (6)
1. The injection device comprises a medicament tube (1) for containing medicament and a piston (2) for pushing the medicament, wherein a needle is arranged at the head end of the medicament tube (1), the piston (2) is arranged at the tail end of the medicament tube (1), and the piston (2) can move from the tail end to the head end in the medicament tube (1) to push the medicament, and the injection device is characterized by further comprising a sleeve (5) and a push rod (3) arranged at the tail end of the sleeve (5), the medicament tube (1) is detachably arranged in the sleeve (5), the push rod (3) can move along the extending direction of the medicament tube (1), and the head end of the push rod (3) abuts against the tail end face of the piston (2);
the side of the sleeve (5) is provided with an opening for the medicament tube (1) to enter and exit, the head end of the sleeve (5) is provided with an avoidance groove for avoiding a needle, the tail end of the sleeve (5) is provided with a side lug, and the periphery of the sleeve (5) is provided with a fixing buckle (7) for fixing the medicament tube (1);
the piston (2) is specifically a rubber piston, and a concave is arranged in the middle of the end face of the tail end of the rubber piston;
the inner side of the tail end of the sleeve (5) is provided with an internal thread, and the outer side of the tail end of the medicament tube (1) is provided with an external thread matched with the internal thread.
2. The injection device according to claim 1, wherein the piston (2) is provided with an annular protrusion at its outer periphery, and an annular groove is provided on the inner side wall of the head end of the medicament tube (1), which can be snapped with the annular protrusion to limit withdrawal of the piston (2).
3. An injection device according to claim 2, wherein the piston (2) is provided with a plurality of said annular projections in turn in the axial direction at its outer periphery.
4. An injection device according to claim 1, wherein the needle is provided at the edge of the head end face of the medicament tube (1).
5. Injection device according to claim 1, characterized in that the tail end of the sleeve (5) is provided with a guide block (4), the middle part of the guide block (4) is provided with a through hole matched with the push rod (3), and the push rod (3) is arranged in the through hole.
6. The injection device according to claim 5, wherein the head end of the push rod (3) is clamped with a push rod head (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710308535.9A CN106975126B (en) | 2017-05-04 | 2017-05-04 | Injection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710308535.9A CN106975126B (en) | 2017-05-04 | 2017-05-04 | Injection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106975126A CN106975126A (en) | 2017-07-25 |
| CN106975126B true CN106975126B (en) | 2023-11-07 |
Family
ID=59341015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710308535.9A Active CN106975126B (en) | 2017-05-04 | 2017-05-04 | Injection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106975126B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107174730A (en) * | 2017-07-27 | 2017-09-19 | 深圳开立生物医疗科技股份有限公司 | Couplant extrusion device and ultrasonic diagnostic equipment |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2910235Y (en) * | 2006-05-12 | 2007-06-13 | 李�根 | Safety syringe |
| CN201012196Y (en) * | 2007-01-19 | 2008-01-30 | 中山博泰药械有限公司 | Clip type bottle water injection pre-pouring injection syringe |
| CN201361324Y (en) * | 2009-03-19 | 2009-12-16 | 牛俐 | Disposable injector |
| CN201492763U (en) * | 2009-09-27 | 2010-06-02 | 郝杰 | Disposable self-locking type syringe |
| CN203815993U (en) * | 2014-04-29 | 2014-09-10 | 周学锋 | Recycling-prevention injector with multisection-separated pushing rod |
| CN105339027A (en) * | 2013-06-28 | 2016-02-17 | 群康生技股份有限公司 | Syringe |
| CN207734420U (en) * | 2017-05-04 | 2018-08-17 | 广东工业大学 | A kind of injection device |
-
2017
- 2017-05-04 CN CN201710308535.9A patent/CN106975126B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2910235Y (en) * | 2006-05-12 | 2007-06-13 | 李�根 | Safety syringe |
| CN201012196Y (en) * | 2007-01-19 | 2008-01-30 | 中山博泰药械有限公司 | Clip type bottle water injection pre-pouring injection syringe |
| CN201361324Y (en) * | 2009-03-19 | 2009-12-16 | 牛俐 | Disposable injector |
| CN201492763U (en) * | 2009-09-27 | 2010-06-02 | 郝杰 | Disposable self-locking type syringe |
| CN105339027A (en) * | 2013-06-28 | 2016-02-17 | 群康生技股份有限公司 | Syringe |
| CN203815993U (en) * | 2014-04-29 | 2014-09-10 | 周学锋 | Recycling-prevention injector with multisection-separated pushing rod |
| CN207734420U (en) * | 2017-05-04 | 2018-08-17 | 广东工业大学 | A kind of injection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106975126A (en) | 2017-07-25 |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |