CN110812604B - Fixed needle puncture-proof syringe - Google Patents
Fixed needle puncture-proof syringe Download PDFInfo
- Publication number
- CN110812604B CN110812604B CN201911114489.4A CN201911114489A CN110812604B CN 110812604 B CN110812604 B CN 110812604B CN 201911114489 A CN201911114489 A CN 201911114489A CN 110812604 B CN110812604 B CN 110812604B
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- China
- Prior art keywords
- protective cap
- needle
- spring
- steel needle
- joint
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- 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.)
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- 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
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3202—Devices for protection of the needle before use, e.g. caps
-
- 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
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
- A61M5/321—Means for protection against accidental injuries by used needles
- A61M5/3213—Caps placed axially onto the needle, e.g. equipped with finger protection guards
-
- 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
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
- A61M5/321—Means for protection against accidental injuries by used needles
- A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
- A61M5/3232—Semi-automatic needle retraction, i.e. in which triggering of the needle retraction requires a deliberate action by the user, e.g. manual release of spring-biased retraction means
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Environmental & Geological Engineering (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention discloses a fixed needle anti-puncture injector which comprises an injection tube with a joint, a steel needle arranged on the joint, a protective cover and a protective cap sleeved outside the joint. After the injector is used for injection, the protective cap can be automatically ejected out to shield the steel needle through simple operation so as to achieve the purpose of preventing puncture. The product has simple structure, easy manufacture and use and low cost, and is very favorable for the popularization of the puncture-proof syringe.
Description
Technical Field
The invention belongs to the field of medical instruments, and particularly relates to a fixed needle puncture-proof injector.
Background
Medicament injection is the most commonly used medical procedure, and syringes (usually fitted with injection needles) are the most commonly used medical devices. In the using process, medical care personnel are punctured by the injection needle, although slight skin and flesh damage happens, serious consequences such as AIDS, viral hepatitis and other diseases can be caused by the puncture-proof injection needle, and therefore the medical care personnel expect the popularization of the puncture-proof injection needle.
In recent years, some patented technologies or products related to the anti-prick syringe have been developed, in which the steel needle is pulled or automatically ejected into the syringe after the injection is completed to achieve the anti-prick effect. The syringes need no retraction and no leakage when puncturing, and can be retracted in a sliding way after injection, so the common characteristics are complex structure, great difficulty in manufacturing process and high cost. The cost is more than dozens of times or even dozens of times higher than that of the common injector, and the use rate of the puncture-proof injector in China is low at present.
In view of this, the development of the puncture-proof injector which can effectively prevent puncture and has low cost has important significance for the popularization and the promotion of the products.
Disclosure of Invention
In view of the defects and market demands in the prior art, the invention mainly aims to provide a fixed needle puncture-proof injector which is provided with a protective cap, and after the injector is used for completing injection, the protective cap can be automatically ejected out to shield a steel needle through simple operation so as to achieve the purpose of puncture prevention. The product has simple structure, easy manufacture and use and low cost, and is very favorable for the popularization of the puncture-proof syringe.
The specific technical scheme adopted to achieve the purpose of the invention is as follows.
The utility model provides a fixed needle puncture-proof syringe, includes the injection cylinder that has the joint, installs steel needle and protecting cover on connecting, its characterized in that: the protective cap is sleeved outside the joint;
the top end of the protective cap is closed, and a needle hole for a steel needle to pass through is arranged in the center of the end face;
a spring is arranged inside the top end of the protective cap, and the top end of the protective cap is connected with the top end of the connector through the spring;
the tail end of the protective cap is an open end and can be in limit clamping with the tail part of the connector;
the premise is that when the tail end of the protective cap and the tail part of the connector are in a limiting clamping state, the spring is in a compressed state, the steel needle penetrates through the spring and then penetrates out of a needle hole in the top end of the protective cap, and the protective cover is sleeved at the top end of the protective cap to shield the exposed steel needle;
when the tail end of the protective cap and the tail part of the connector are in a non-limiting clamping state, the protective cap is popped up under the elastic force action of the spring, and the steel needle is shielded in the protective cap.
In the fixed needle anti-prick syringe of the invention, the main improvement is embodied in the arrangement of the protective cap. The arrangement of the injection cylinder with the joint, the steel needle arranged on the joint and the protective cover can be designed and implemented according to the prior art; it is also easy for a person skilled in the art to determine and operate if the size of the joint and/or the steel needle needs to be adjusted due to the introduction of the protective cap. In the invention, the top ends of the protective cap and the joint are both one end close to the steel needle head, and the tail end is the other end opposite to the steel needle head.
The top end of the protective cap is internally provided with a spring which is used as a core elastic component. From the viewpoint of product stability and ease of assembly, it is preferable that the spring be disposed coaxially with the steel needle. Preferably, two ends of the spring are respectively and fixedly connected with the top end of the connector and the top end of the protective cap. It will be readily appreciated that the length setting of the spring should be sufficient to ensure that the needle is fully shielded within the cap in the non-positive snap-fit condition.
From design convenience and cost consideration, the helmet tail end realizes spacing block through rotating with the joint afterbody. In a preferred embodiment, the inner edge of the tail end of the protective cap is provided with a raised internal thread, the tail part of the connector is provided with an external thread ring, the external thread ring is matched with the internal thread, and the limiting clamping can be realized through screwing.
Preferably, the outer edge of the upper side of the joint is provided with a limiting wing, and a limiting movable section is formed between the outer thread ring and the limiting wing. After the limiting clamping is removed, the internal thread section at the tail end of the protective cap slides into the limiting movable section, the limiting wings can play a role in blocking, the protective cap is prevented from being separated from the joint, and the steel needle is further ensured to be shielded in the protective cap.
Preferably, the top end of the joint is provided with an extension seat, and one end of the spring is fixedly sleeved with the extension seat. Without limitation, the outer edge of the extension seat is provided with a clamping edge which is convenient to be connected with the spring.
Knowing the construction of the fixed needle anti-prick syringe of the invention, it is easy for a person skilled in the art to determine how to manufacture the syringe, and to make a flexible choice by referring to the prior art, which is not described herein.
It will be readily appreciated by those skilled in the art that the fixed needle anti-puncture syringe of the present invention can be provided in two initial ready-to-use states: one is that the tail end of the protective cap and the tail part of the connector are in a limiting clamping state, the spring is compressed, and the steel needle penetrates through a needle hole at the top end of the protective cap but is shielded by the protective cover; the other is that the tail end of the protective cap and the tail part of the connector are in a non-limiting clamping state, and the steel needle is wholly shielded in the protective cap (at the moment, the protective cover can be provided or omitted). However, the former syringe, i.e., the syringe in the limit-locked state, is preferable in terms of convenience of use and higher safety.
Also, it will be readily apparent to those skilled in the art how to use the fixed needle anti-prick syringe of the present invention with the understanding that it is constructed to prevent pricking by a steel needle for the purpose of preventing such pricking. Taking the syringe with the initial standby state as the limit clamping state as an example: when the device is used, the protective cover is removed, injection is carried out according to the conventional operation of a fixed needle injector, after the injection is finished, the limiting clamping state is released in a mode of rotating the protective cap and the like (at the moment, the protective cap is automatically popped out under the elastic force action of the spring and is attached to the skin of the injection part), and then the needle is pulled; in the whole needle pulling process, the pulled steel needle is always shielded by the protective cap under the continuous elastic action of the spring until the steel needle is completely pulled out. Thus, the purpose of preventing puncture is achieved.
Compared with the prior art, the invention has the beneficial effects that: different initial standby states can be selected according to operation habits, the limiting clamping state can be conveniently released after injection is completed, and the protective cap can be automatically popped out to shield the steel needle so as to achieve the purpose of preventing puncture. The product not only has reliable performance, overcomes the defect that the steel needle of the existing puncture-proof injector slides, but also has simple structure, easy manufacture and use, greatly reduced cost and easy popularization. The fixed needle puncture-proof injector has simple and small structure, and is particularly suitable for small-dose injection such as vaccine injection, skin test needle and the like.
Drawings
FIG. 1 is a schematic view showing the overall structure of a fixed needle anti-prick syringe (limit engagement state) according to example 1;
FIG. 2 is a schematic view showing the overall structure of the fixed needle anti-prick syringe (non-limit engagement state) according to example 1;
FIG. 3 is a schematic view showing the entire structure of the fixed needle puncture-proof syringe (non-limit engagement state) according to example 2;
FIG. 4 is a diagram showing a sample used in the experimental example before use;
FIG. 5 is a diagram showing a sample used in the experimental example after use.
Detailed Description
The present invention will be described in further detail with reference to the following examples and drawings, but the present invention should not be construed as being limited to the scope of the present invention.
Example 1
As shown in figure 1, the fixed needle anti-puncture injector in a limiting clamping state comprises an injection cylinder 1, a steel needle 2, a protective cover 3 and a protective cap 4.
The syringe 1 has a fitting 10. An extension seat 13 is arranged at the top end of the joint 10, and a convex clamping edge is arranged on the outer edge of the extension seat 13; the tail part is provided with a raised external thread ring 11.
The steel needle 2 is mounted on the adapter 10 of the syringe 1 in a conventional manner.
The protective cap 4 is sleeved outside the joint 10, the top end of the protective cap is closed, and a pinhole 41 is arranged in the center of the end face. The steel needle 2 passes through the needle hole 41 and is exposed out of the protective cap 4.
A spring 5 (shown in a compressed state) coaxial with the steel needle 2 is arranged inside the top end of the protective cap 4, one end of the spring 5 is fixedly connected with the top end of the protective cap 4, and the other end of the spring 5 is fixedly sleeved with the extension seat 13 through a clamping edge on the outer edge of the extension seat 13 (the end of the spring 5 is clamped through the clamping edge).
The end of the protective cap 4 is an open end, and a raised internal thread 42 is arranged on the inner edge of the open end. The internal thread 42 is adapted to the external thread ring 11. When the cap 4 is rotated clockwise, the female screw 42 and the male screw 11 are locked in position, and the cap 4 and the joint 10 are engaged with each other in a position-limited manner.
The protecting cover 3 is sleeved on the top end of the protecting cap 4 to shield the exposed steel needle 2. The top end of the protective cap 4 is provided with a round table step-shaped structure matched with the sleeving part of the protective cover 3 and a clamping groove (not shown) matched with the protective cover 3.
It will be apparent that fig. 1 shows a typical initial ready-to-use condition of the fixed needle anti-prick syringe of the present invention. When in use, the protective cover 3 is removed, the injection is carried out according to the conventional operation of the injector, after the injection is finished, the protective cap 4 is rotated anticlockwise to relieve the limiting clamping state, and then the needle is pulled. Under the action of the elastic force of the spring 5, the steel needle 2 pulled out in the whole needle pulling process is always shielded by the protective cap 4 until the steel needle 2 is completely pulled out, thereby achieving the purpose of preventing puncture. The whole process has reliable performance, overcomes the defect that the steel needle of the existing puncture-proof syringe slides, has simple structure and easy implementation, and greatly reduces the manufacturing and using cost.
Fig. 2 is a schematic view of the overall structure of the fixed needle anti-prick syringe of the present invention in a non-limiting engaging state, and is a schematic view of the structure of the syringe shown in fig. 1 after use. It can be seen that the needle 2 is shielded by the cap 4 and due to the fixed connection of the spring 5, the cap 4 will not disengage from the connector 10 when ejected.
Example 2
As shown in fig. 3, embodiment 2 differs from embodiment 1 only in that: the outer edge of the upper side (the tail end of the extension seat 13) of the joint 10 is provided with a limiting wing 12, and a limiting movable section is formed between the external thread ring 11 and the limiting wing 12. After the limiting block is removed, the internal thread section at the tail end of the protective cap 4 slides into the limiting movable section. The internal thread section of the protective cap 4 can not pass through the limiting wings 12 due to the blocking of the limiting wings 12, so that the protective cap 4 can not be separated from the joint 10, and the protective cap 4 shields the steel needle 2, thereby achieving the purpose of preventing puncture.
Application examples
After understanding the structure of the fixed needle anti-prick syringe of the present invention, the technical effects and performance advantages of the present invention can be fully understood based on the structure. To further verify the effect of the invention, the applicant conducted application experiments using actual products.
1. The experimental site: biological medical laboratory of Zhanjiang Jianliyuan medical supplies GmbH.
2. Experimental sample
A fixed needle anti-prick syringe as shown in FIG. 4 was used as the experimental sample, with a gauge of 1mL (the protective cover was removed in advance for the purpose of clearly photographing the steel needle). In the figure, the left side is an overall object image, and the right side is a partially enlarged object image.
3. Subject: rabbits for medical experiments.
4. Experimental methods
1) Removing a protecting cover of the fixed needle anti-puncture syringe, and sucking the experimental liquid medicine;
2) puncturing a steel needle of the fixed needle puncture-proof injector on an experimental object, and performing conventional injection operation;
3) after the injection is finished, the protective cap is rotated anticlockwise until the protective cap and the connector are released from a limiting clamping state (approximately rotating for one third of a circle), at the moment, the protective cap is automatically popped out under the action of the elastic force of the spring and is attached to the skin of the injection part of the experimental object, and then the needle is pulled out. In the whole needle pulling process, the pulled steel needle is always shielded by the protective cap until the steel needle is completely pulled out.
5. Results of the experiment
As shown in fig. 5, the left side is an object diagram of the fixed needle anti-prick syringe after use, and the right side is a partially enlarged object diagram.
The fixed needle puncture-proof injector provided by the invention has the advantages that the steel needle is always in a shielded state except for the link of sucking liquid medicine through the needle head, the link of subsequent injection and needle pulling and the link of placing and treating waste products after use, so that the hidden danger of puncture is avoided even if the action amplitude is large, and the purpose of puncture prevention is achieved.
The product not only has reliable performance, overcomes the defect that the steel needle of the existing puncture-proof injector slides, but also has simple structure and easy implementation, and greatly reduces the manufacturing and using cost.
The foregoing description is only exemplary of the invention. From the above, those skilled in the art can make various changes and modifications without departing from the technical idea of the present invention. The protection scope of the present invention is not limited to the above-mentioned embodiments, but is subject to the scope defined by the claims.
Claims (5)
1. The utility model provides a fixed needle puncture-proof syringe, includes the injection cylinder that has the joint, installs steel needle and protecting cover on connecting, its characterized in that: the protective cap is sleeved outside the joint;
the top end of the protective cap is closed, and a needle hole for a steel needle to pass through is arranged in the center of the end face;
a spring is arranged inside the top end of the protective cap, the spring is arranged in a manner of being coaxial with the steel needle, and two ends of the spring are respectively fixedly connected with the top end of the connector and the top end of the protective cap;
the tail end of the protective cap is an opening end and can be in limit clamping with the tail part of the connector through screwing;
when the tail end of the protective cap and the tail part of the connector are in a limiting clamping state, the spring is in a compressed state, the steel needle penetrates through the spring and then penetrates out of the needle hole at the top end of the protective cap, and the protective cover is sleeved at the top end of the protective cap to shield the exposed steel needle;
when the tail end of the protective cap and the tail part of the connector are in a non-limiting clamping state, the protective cap is popped up under the elastic force of the spring, and the steel needle is shielded in the protective cap;
when the device is used, the protective cover is removed, injection is carried out according to the conventional operation of a fixed needle injector, after the injection is finished, the limiting clamping state is released by rotating the protective cap, the protective cap is automatically popped out under the elastic force action of the spring and is attached to the skin of the injection part, and then the needle is pulled; in the whole needle pulling process, the pulled steel needle is always shielded by the protective cap under the continuous elastic action of the spring until the steel needle is completely pulled out.
2. The fixed needle anti-prick syringe according to claim 1, characterized in that: the interior edge of helmet tail end is provided with bellied internal thread, and the joint afterbody is provided with the external thread circle, and the external thread circle is connected with the internal thread adaptation soon to the accessible and is realized spacing block.
3. The fixed needle anti-prick syringe according to claim 2, characterized in that: and a limiting wing is arranged on the outer edge of the upper side of the joint, and a limiting movable section is formed between the outer thread ring and the limiting wing.
4. The fixed needle anti-prick syringe according to claim 1, characterized in that: the top of joint is provided with the extension seat, and the one end and the extension seat of spring are fixed to be cup jointed.
5. The fixed needle anti-prick syringe according to claim 4, characterized in that: the outer edge of the extension seat is provided with a clamping edge which is convenient to be connected with the spring.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911114489.4A CN110812604B (en) | 2019-11-14 | 2019-11-14 | Fixed needle puncture-proof syringe |
| US17/603,981 US20220203044A1 (en) | 2019-11-14 | 2020-11-09 | Stab-preventing injection needle and stab-preventing injector with elastic protective cap |
| PCT/CN2020/127569 WO2021093709A1 (en) | 2019-11-14 | 2020-11-09 | Stab-preventing injection needle and stab-preventing injector with elastic protective cap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911114489.4A CN110812604B (en) | 2019-11-14 | 2019-11-14 | Fixed needle puncture-proof syringe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110812604A CN110812604A (en) | 2020-02-21 |
| CN110812604B true CN110812604B (en) | 2020-07-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911114489.4A Active CN110812604B (en) | 2019-11-14 | 2019-11-14 | Fixed needle puncture-proof syringe |
Country Status (1)
| Country | Link |
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| CN (1) | CN110812604B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220203044A1 (en) * | 2019-11-14 | 2022-06-30 | Zhanjiang Jianliyuan Medical Products Co., Ltd. | Stab-preventing injection needle and stab-preventing injector with elastic protective cap |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3802353A1 (en) * | 1988-01-27 | 1989-08-10 | Uwe W Dr Ballies | Safety cannula |
| CN101239209A (en) * | 2008-03-17 | 2008-08-13 | 张亚根 | Disposable safety vein puncture needle |
| CN102188763A (en) * | 2011-03-14 | 2011-09-21 | 张亚根 | Disposable safe transfusion needle |
| CN103239780A (en) * | 2012-02-14 | 2013-08-14 | 上海双鸽实业有限公司 | Safety syringe needle |
| CN205286368U (en) * | 2015-11-26 | 2016-06-08 | 李燕玲 | Safe blood taking needle |
| CN107158524A (en) * | 2017-05-25 | 2017-09-15 | 中南大学湘雅医院 | Safety syringe needle |
-
2019
- 2019-11-14 CN CN201911114489.4A patent/CN110812604B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3802353A1 (en) * | 1988-01-27 | 1989-08-10 | Uwe W Dr Ballies | Safety cannula |
| CN101239209A (en) * | 2008-03-17 | 2008-08-13 | 张亚根 | Disposable safety vein puncture needle |
| CN102188763A (en) * | 2011-03-14 | 2011-09-21 | 张亚根 | Disposable safe transfusion needle |
| CN103239780A (en) * | 2012-02-14 | 2013-08-14 | 上海双鸽实业有限公司 | Safety syringe needle |
| CN205286368U (en) * | 2015-11-26 | 2016-06-08 | 李燕玲 | Safe blood taking needle |
| CN107158524A (en) * | 2017-05-25 | 2017-09-15 | 中南大学湘雅医院 | Safety syringe needle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110812604A (en) | 2020-02-21 |
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Address after: No. 679 Guangyuan Road, Longtou Town, Potou District, Zhanjiang City, Guangdong Province, 524001 Patentee after: Zhanjiang Jianliyuan Medical Supplies Co.,Ltd. Address before: 524001 No.26, middle Renmin Avenue, Zhanjiang City, Guangdong Province Patentee before: ZHANJIANG JIANLIYUAN MEDICAL PRODUCTS Co.,Ltd. |