CN110812618B - Puncture-proof injection needle with elastic sheath - Google Patents
Puncture-proof injection needle with elastic sheath Download PDFInfo
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- CN110812618B CN110812618B CN201911114490.7A CN201911114490A CN110812618B CN 110812618 B CN110812618 B CN 110812618B CN 201911114490 A CN201911114490 A CN 201911114490A CN 110812618 B CN110812618 B CN 110812618B
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- needle
- protective cap
- spring
- injection
- top end
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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
- 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
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (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 elastic sheath puncture-proof injection needle, which comprises a needle seat, a steel needle and a protective cap sleeved outside the needle seat; 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 needle base through the spring; the tail end of the protective cap is an opening end and can be in limit clamping with the tail end of the needle seat. The injection needle of the invention can make the protective cap automatically pop out of the shielding steel needle through simple operation after injection to achieve the puncture-proof effect, has simple structure, easy manufacture and use and low cost, and can be matched with the prior injectors of most models for use.
Description
Technical Field
The invention belongs to the field of medical instruments, and particularly relates to an elastic sheath puncture-proof injection needle.
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, there have been some patented technologies or products related to the anti-prick syringe, which achieve the anti-prick effect by pulling or automatically ejecting the steel needle into the syringe after the injection is completed. 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. In the patent product of application No. 201610675994.6, the stab-resistant sheath composed of a plurality of sliders shields the steel needle to achieve the stab-resistant effect, and the product overcomes the defect that the steel needle is not enough to be incorporated into the stab-resistant part of the needle cylinder, but has more complex structure, higher cost and inconvenient operation. The existing puncture-proof injector is more than dozens of times or even dozens of times of the price of the ordinary injector, and the utilization rate of the puncture-proof injector in China is very low and is far lower than that of the part of developed countries which are gradually popularized.
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
Aiming at the defects and market demands of the prior art, the invention mainly aims to provide the puncture-proof injection needle with the elastic sheath, and the protective cap can be automatically popped out to shield the steel needle through simple operation after injection is finished so as to achieve the puncture-proof effect. The product has simple structure, easy manufacture and use and low cost, and can be matched with the injectors of most of the prior models for use.
The specific technical scheme adopted to achieve the purpose of the invention is as follows.
An elastic sheath puncture-proof injection needle comprises a needle seat and a steel needle which are fixedly connected with each other, and also comprises a protective cap sleeved outside the needle seat;
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 needle base through the spring;
the tail end of the protective cap is an opening end and can be in limit clamping with the tail end of the needle seat;
the premise is that when the tail end of the protective cap and the tail end of the needle seat are in a limiting clamping state, the spring is compressed, and the steel needle penetrates through the spring and then penetrates out of the needle hole;
when the tail end of the protective cap and the tail end of the needle base are in a non-limiting clamping state, the protective cap automatically pops up under the elastic force of the spring to shield the steel needle in the protective cap.
In the elastic sheath puncture-proof injection needle of the invention, the main improvement point is embodied in the arrangement of the protective cap. The fixed connection between the needle holder and the steel needle can be designed and implemented with reference to the prior art, which is also easy to determine and operate for the skilled person if the dimensions of the needle holder and/or the steel needle need to be adjusted due to the introduction of the protective cap. In the invention, the top ends of the protective cap and the needle base are both one ends close to the steel needle head, and the tail ends are the other ends opposite to the steel needle head.
The protecting cap is sleeved outside the needle base, and when the tail end of the protecting cap and the tail end of the needle base are in a limiting clamping state, the protecting cap is preferably selected to shield the whole needle base.
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 needle seat 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 tail end of the protective cap and the tail end of the needle seat are screwed to realize limiting clamping. In a preferred embodiment, the inner edge of the tail end of the protective cap is provided with a raised internal thread, the tail end of the needle base is provided with a side wing, and the side wing is matched with the internal thread and can realize limiting clamping through screwing.
Preferably, the outer edge of the upper side of the needle seat is provided with a limiting wing, and a limiting movable section is formed between the lateral wing 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 needle seat, and the steel needle is further ensured to be shielded in the protective cap.
Preferably, the top end of the needle seat 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.
Optionally, the resilient sheath anti-stick injection needle of the present invention further comprises a protective cap that is sleeved over the tip of the protective cap. As a preferred embodiment, in the limiting clamping state, the steel needle penetrates out of the protective cap, and the sleeved protective cover can shield the exposed steel needle.
Optionally, a shielding tube is further provided at the outer edge of the spring to prevent possible left and right deflection of the spring in a compressed state. The inner diameter of the shielding pipe is larger than the outer diameter of the spring ring, the height of the shielding pipe is preferably the same as that of the extension seat, and the bottom end of the shielding pipe is sleeved at the bottom end of the extension seat.
Knowing the above-described construction of the resilient sheath anti-stick injection needle of the present invention, it is readily ascertainable to those skilled in the art how to make the injection, and a flexible choice can be made by taking reference to the prior art, which is not described herein in detail.
It will be readily appreciated by those skilled in the art that the resilient sheath anti-stick needle of the present invention can have two initial readiness states: one is that the tail end of the protective cap and the tail end of the needle stand are in a limit clamping state, the spring is compressed, the steel needle passes through a needle hole at the top end of the protective cap but is shielded by a protective cover sleeved at the top end of the protective cap; the other is that the tail end of the protective cap and the tail end of the needle base are in a non-limiting clamping state, and the steel needle is wholly shielded in the protective cap (at the moment, a protective cover can be arranged or omitted). The former type, i.e., the injection needle in the limit engagement state is preferable in terms of convenience of use and higher safety.
It will also be readily apparent to those skilled in the art how to use the injection for the purpose of preventing puncture by a steel needle, knowing the construction of the resilient sheath puncture resistant injection needle of the present invention. Taking the injection needle with the initial standby state as the limiting clamping state as an example: when the device is used, the needle base and the connector of the injector are screwed tightly, the protective cover is removed, the injection is carried out according to the conventional operation of the 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 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 has simple structure, easy manufacture and use and low cost, and can be matched with the injectors of most of the prior models for use.
Drawings
Fig. 1 is a schematic view of the overall structure of the elastic sheath puncture-proof needle (limit engagement state) shown in embodiment 1;
FIG. 2 is a schematic view of the overall structure of the needle (non-limit engagement state) with the elastic sheath of embodiment 1;
FIG. 3 is a schematic view showing the overall structure of the needle (non-limit engagement state) with the elastic sheath in embodiment 2;
FIG. 4 is a pictorial representation of a syringe equipped with an injection needle of the present invention in an example of use prior to use;
FIG. 5 is a pictorial representation of a syringe equipped with an injection needle of the present invention after use in an example embodiment;
fig. 6 is an enlarged view of the injection needle of the present invention before and after use in an example of application.
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 elastic sheath puncture-proof injection needle in a limiting clamping state comprises a needle base 1, a steel needle 2, a protective cover 3 and a protective cap 4.
The needle holder 1 and the steel needle 2 are fixedly connected in a conventional manner. Wherein, the tail end of the needle base 1 is provided with a convex flank 11, the top end is provided with an extension base 13, and the outer edge of the extension base 13 is provided with a convex clamping edge.
The protective cap 4 is sleeved outside the needle base 1, the top end of the protective cap is closed, and a needle hole 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 flank 11. The protective cap 4 is rotated clockwise, the internal thread 42 is locked with the flank 11, and therefore the protective cap 4 and the needle base 1 are in a limiting clamping state.
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 for the resilient sheath anti-pierce needle of the present invention. When the device is used, the needle base 1 and the connector of the injector are screwed tightly, the protecting cover 3 is removed, the injection is carried out according to the conventional operation of the injector, after the injection is finished, the protecting 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 puncture-proof injection needle with the elastic sheath in the non-limiting clamping state, and is also a schematic view of the structure of the injection needle shown in fig. 1 after use. It can be seen that the steel needle 2 is shielded by the protective cap 4, and due to the fixed connection effect of the spring 5, the protective cap 4 cannot be separated from the needle base 1 when being 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 needle seat 1 is provided with a limiting wing 12, and a limiting movable section is formed between the side wing 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 needle base 1, 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 anti-puncturing injection needle with the elastic sheath, the technical effects and the performance advantages of the 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 syringe equipped with a resiliently sheathed puncture-resistant needle of the present invention as shown in fig. 4 was used as the experimental sample, with a gauge of 2.5 mL. In the figure, the left side shows the sample object with the protective cover, and the right side shows the sample object with the protective cover removed.
3. Subject: rabbits for medical experiments.
4. Experimental methods
1) Removing the protecting cover of the syringe, and sucking the experimental liquid medicine;
2) puncturing a steel needle 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 needle seat 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 the real object diagram of the used experimental sample, and the right side is the real object diagram of the separated state of the elastic sheath puncture-proof injection needle and the injector joint of the invention after being used.
Further, fig. 6 shows an actual view of the resilient sheath needle guard of the present invention before and after use (without the protective cover).
The puncture-proof injection needle with the elastic sheath 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, and the puncture-proof injection needle is free from the hidden danger of puncture even if the action amplitude is large, so that the purpose of preventing puncture is achieved.
The product 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.
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 (2)
1. The utility model provides an elasticity sheath prevents stinging syringe needle, includes needle file and steel needle and the protecting cover of fixed connection each other, its characterized in that: the needle base is sleeved with the needle seat;
an extension seat is arranged at the top end of the needle seat, and a clamping edge is arranged on the outer edge of the extension seat;
the top end of the protective cap is closed, and a needle hole for a steel needle to penetrate through is formed in the center of the end face;
a spring is arranged inside the top end of the protective cap and is arranged in a manner of being coaxial with the steel needle, one end of the spring is fixedly connected with the top end of the protective cap, and the other end of the spring is fixedly sleeved with the extension seat through a clamping edge on the outer edge of the extension seat;
the tail end of the protective cap is an opening end, a raised internal thread is arranged on the inner edge of the protective cap, a side wing is arranged at the tail end of the needle base, the side wing is matched with the internal thread, and limiting clamping can be realized through screwing;
the outer edge of the upper side of the needle base is provided with a limiting wing, and a limiting movable section is formed between the lateral wing and the limiting wing;
when the tail end of the protective cap and the tail end of the needle base are in a limiting clamping state, the spring is compressed, the steel needle penetrates through the spring and then penetrates out of the needle hole, 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 end of the needle base are in a non-limiting clamping state, the protective cap automatically pops up under the elastic force of the spring to shield the steel needle in the protective cap;
when the device is used, the needle base and the connector of the injector are screwed tightly, the protective cover is removed, the injection is carried out according to the conventional operation of the 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 action of the spring at the moment and is attached to the skin of the injection part, and then the needle is pulled out; 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 resilient sheath puncture resistant injection needle of claim 1 wherein: and a shielding pipe is arranged on the outer edge of the spring.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911114490.7A CN110812618B (en) | 2019-11-14 | 2019-11-14 | Puncture-proof injection needle with elastic sheath |
| PCT/CN2020/127569 WO2021093709A1 (en) | 2019-11-14 | 2020-11-09 | Stab-preventing injection needle and stab-preventing injector with elastic protective cap |
| US17/603,981 US20220203044A1 (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 |
|---|---|---|---|
| CN201911114490.7A CN110812618B (en) | 2019-11-14 | 2019-11-14 | Puncture-proof injection needle with elastic sheath |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110812618A CN110812618A (en) | 2020-02-21 |
| CN110812618B true CN110812618B (en) | 2020-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911114490.7A Active CN110812618B (en) | 2019-11-14 | 2019-11-14 | Puncture-proof injection needle with elastic sheath |
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| CN (1) | CN110812618B (en) |
Families Citing this family (2)
| 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 |
| CN113101463B (en) * | 2021-03-16 | 2022-11-11 | 湛江健力源医疗用品有限公司 | Puncture-proof injection needle and injector comprising same |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| US20180099094A1 (en) * | 2016-10-12 | 2018-04-12 | Abbvie Inc. | Automatic injection device |
| CN208726454U (en) * | 2018-06-01 | 2019-04-12 | 三六三医院 | Anti-stabbing syringe needle |
| CN208877582U (en) * | 2018-04-11 | 2019-05-21 | 许璐 | A kind of puncture-proof syringe |
-
2019
- 2019-11-14 CN CN201911114490.7A patent/CN110812618B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| US20180099094A1 (en) * | 2016-10-12 | 2018-04-12 | Abbvie Inc. | Automatic injection device |
| CN208877582U (en) * | 2018-04-11 | 2019-05-21 | 许璐 | A kind of puncture-proof syringe |
| CN208726454U (en) * | 2018-06-01 | 2019-04-12 | 三六三医院 | Anti-stabbing syringe needle |
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| CN110812618A (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. |
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