CN211272893U - Syringe needle self-recovery syringe - Google Patents

Abstract

The utility model discloses a syringe needle is from retrieving syringe, include: the syringe comprises a syringe sleeve, a push rod, a needle assembly, an elastic connecting sleeve and a fastening bolt. The injection end of the syringe barrel has a hollow needle attachment member, the first sidewall of which is provided with a first opening. The push rod is slidably disposed within the syringe barrel and in sealing engagement with the inner wall of the syringe barrel. An end of the needle assembly is cooperatively disposed within the needle attachment member with only a gap from the first sidewall. The elastic connecting sleeve is sleeved on the outer wall of the needle head connecting piece. When the fastening bolt is in the state of screwing, the top supports the position corresponding to the first opening on the elastic connection sleeve, so that the elastic connection sleeve passes through the first opening and supports on the needle head assembly, the needle head assembly is fixed on the inner wall of the needle head connecting piece in a sealing mode, and when the fastening bolt is in the state of unscrewing, the needle head assembly falls into the syringe sleeve. The syringe needle self-recovery syringe of the utility model avoids the medical care personnel or the cleaning personnel from being pricked by the syringe needle, and has simple and convenient operation.

Description

Syringe needle self-recovery syringe

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to syringe needle is from retrieving syringe.

Background

At present, after a medical worker carries out injection treatment on a patient by using an injector, a needle head of the used injector is exposed, if the disposable injector is directly thrown into a garbage can, the medical worker is easy to stab a sanitation worker, and if the medical worker covers a protective cover, the protective cover is required to be sleeved from a needle point, and the medical worker is also easy to stab. In addition, because the boot is separate from the syringe, if the boot rolls or falls elsewhere, the health care provider needs to find it, which is extremely inconvenient. In addition, after the needle head is covered by the protective cover, the needle head can fall off due to loose connection, and cleaning personnel can be easily hurt.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned prior art not enough, provide a syringe needle self recovery syringe, after injection operation, medical personnel only need loosen fastening bolt soon, then stimulate the push rod downwards, and the syringe needle subassembly can be automatic to fall into the telescopic cavity of syringe, has realized the purpose that the syringe needle was retrieved, prevents fundamentally to prick medical personnel and personnel of keeping a public place clean, and easy and simple to handle.

According to an aspect of the utility model, this syringe needle is from retrieving the syringe includes: the syringe comprises a syringe sleeve, a push rod, a needle assembly, an elastic connecting sleeve and a fastening bolt. The injection end of the syringe barrel has a hollow needle attachment member with a first opening in a first sidewall thereof. The push rod is slidably disposed within the syringe barrel and in sealing engagement with the syringe barrel inner wall. An end of the needle assembly is cooperatively disposed within the needle attachment member with only a gap from the first sidewall. The elastic connecting sleeve is sleeved on the outer wall of the needle head connecting piece. And when the fastening bolt is in a screwing state, the elastic connecting sleeve is propped against the position corresponding to the first opening on the elastic connecting sleeve, so that the elastic connecting sleeve at the position passes through the first opening and is propped against the needle head assembly, the needle head assembly is hermetically fixed on the inner wall of the needle head connecting piece, and when the fastening bolt is in a unscrewing state, the needle head assembly falls into the syringe sleeve.

In one embodiment, the area of the first opening is larger than the cross-sectional area of the stud of the fastening bolt, so that the fastening bolt can press the elastic connecting sleeve against the needle assembly.

In one embodiment, the needle hub has a square or rectangular cross-section.

In one embodiment, the needle assembly includes a needle and a holder in which a lower section of the needle is secured and in communication with the exterior.

In one embodiment, the fixing seat is disposed in the needle connector in a fitting manner, and has a gap only with the first sidewall.

In one embodiment, a second channel is arranged in the center of the fixed seat, and the lower section of the needle head is fixedly connected in the second channel.

In one embodiment, the bottom of the fixed seat is provided with a horn-shaped confluence groove which is communicated with the bottom end of the needle head.

In an embodiment, the injection device further comprises an annular fixing sleeve fixedly sleeved on the injection end of the syringe sleeve and provided with a first channel corresponding to the first opening, the first channel is provided with internal threads, and the fastening bolt is arranged to be screwed into the first channel.

In one embodiment, the top end of the annular hub has an opening for the needle to pass through.

In one embodiment, the annular retainer is bonded to or integrally formed with the outer wall of the injection end of the syringe sleeve.

According to the above technical scheme, the utility model discloses possess at least one in following advantage and the positive effect:

the utility model provides a syringe needle is from retrieving the syringe, and the syringe needle subassembly has a clearance with the first side wall of syringe needle connecting piece for the size of syringe needle connecting piece is a bit bigger than the size of syringe needle subassembly, and the syringe needle subassembly can drop downwards. The elastic connecting sleeve is sleeved on the outer wall of the needle head connecting piece, so that the fastening bolt can prop the elastic connecting sleeve against the needle head component, sealing is realized, and leakage of a medicament is avoided. Through the arrangement, the utility model provides a syringe is after using, through loosening soon and pulling the push rod downwards, the syringe needle subassembly can fall into syringe telescopic cavity automatically, has realized that the syringe needle is from retrieving, can avoid medical personnel or the personnel of keeping a public place clean to be pricked by the syringe needle very effectively, and is easy and simple to handle moreover.

Drawings

FIG. 1 is a schematic structural view of the syringe with self-retracting needle of the present invention before use;

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;

fig. 3 is a schematic structural view of the syringe needle self-recovery syringe of the present invention after use.

Description of reference numerals:

1. a syringe barrel; 11. a needle head connector; 111. a first side wall; 112. a first opening; 2. a push rod; 3. a needle assembly; 31. a needle head; 32. a fixed seat; 321. a second channel; 4. an elastic connecting sleeve; 5. an annular fixing sleeve; 51. a first channel; 6. fastening a bolt; 7. a protective cover.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.

Although relative terms such as "top," "bottom," "upper," "lower," "inner," "outer," and the like may be used herein to describe one element of an icon relative to another, these terms are used herein for convenience only. If the device of the icon is turned upside down, the component described as "upper" will become the component "lower". When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via another structure. The terms "a", "an", "the" and "the" are used to indicate the presence of one or more elements/components/parts/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.

As shown in figures 1-3, the utility model provides a syringe needle self-recovery injector, wherein, figure 1 is the utility model discloses a syringe needle self-recovery injector is the schematic structure before using. Fig. 2 is an enlarged view of a portion a in fig. 1, showing the fastening bolt 6 pushing the elastic connecting sleeve 4 against the needle assembly 3 and fixing it to the inner wall of the needle connector 11. Fig. 3 is the structure diagram of the syringe needle after using, as can be seen from fig. 3, when the fastening bolt 6 is unscrewed, the syringe needle assembly 3 falls into the cavity of the syringe sleeve 1, and the syringe needle self-recovery is realized. The structure, connection and functional relationship of the main components of the syringe needle self-retracting syringe according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1 to 2, in the present embodiment, a needle self-recovery injector is provided, which includes an injector sleeve 1, a push rod 2, a needle assembly 3, an elastic connecting sleeve 4 and a fastening bolt 6. Wherein, the injection end of the syringe sleeve 1 is provided with a needle head connecting piece 11, and the needle head connecting piece 11 is of a hollow structure and is convenient for the circulation of the medicament. The first side wall 111 of the needle attachment means 11 is provided with a first opening 112. The push rod 2 is arranged in the syringe sleeve 1 in a sliding mode, and the top end of the push rod 2 is a sealing plug, so that the push rod 2 is in sealing fit with the inner wall of the syringe sleeve 1. An end of the needle assembly 3 is fittingly arranged in the needle attachment 11 with only a clearance from the first side wall 111. The elastic connecting sleeve 4 is sleeved on the outer wall of the needle head connecting piece 11. The fastening bolt 6 is screwed into the first channel 51, when the fastening bolt 6 is in a screwing state, the fastening bolt abuts against the position, corresponding to the first opening 112, of the elastic connecting sleeve 4, so that the elastic connecting sleeve 4 at the position passes through the first opening 112 to abut against the needle head assembly 3, the needle head assembly 3 is hermetically fixed on the inner wall of the needle head connecting piece 11, when the fastening bolt 6 is in an unscrewing state, the needle head assembly 3 falls into the syringe sleeve 1, and the needle head is recovered automatically. Through the design, the utility model provides a syringe needle is from retrieving syringe can realize that the syringe needle is from retrieving, can avoid medical personnel or the personnel of keeping a public place clean to be pricked by the syringe needle very effectively, and is easy and simple to handle moreover.

It should be noted that the elastic connecting sleeve 4 has a strong elasticity, and is a hollow tubular structure, and can be hermetically sleeved on the outer wall of the needle connector. The material of the outer wall 4 of the elastic connecting piece may be medical latex, medical PVC (polyvinyl chloride), etc., as long as the material has certain elasticity and ductility and does not harm the human body, which is not limited herein. Here, the injection end refers to an end of the syringe barrel 1, which is away from the pressing hand of the push rod 2, through which the medical fluid is injected into the muscle, and includes the needle attachment 11 and a portion of the barrel wall connected thereto. Of course, the bottom end of the syringe barrel (the end distal to the injection end) has a shoulder extending outwardly from the syringe barrel wall, which is well known in the art and will not be described further herein. Of course, the wall of the syringe barrel in the present application is also provided with scales, the bottom end of the push rod is provided with a press handle, and the like, and these structures are well known in the prior art and will not be described herein.

Further, as shown in fig. 1 and 2, in the present embodiment, in order to enable the fastening bolt 6 to press the elastic connection sleeve 4 against the needle assembly 3, the opening area on the first side wall 111 of the needle attachment 11 is larger than the cross-sectional area of the stud of the fastening bolt 6, so that the fastening bolt 6 can pass through the first opening 112 with the elastic connection sleeve 4.

Further, in this embodiment, the cross section of the needle head connector 11 is designed to be square or rectangular, and then the needle head assembly 3 is matched with the inner wall (except the first side wall 111) of the needle head connector 11, so that the needle head assembly 3 can be tightly attached to the inner wall of the needle head connector 11, and when the fastening bolt 6 abuts the elastic connecting sleeve 4 against the needle head assembly 3, the abutting part of the needle head assembly 3 is also a plane, so that sealing is easily realized. Specifically, the needle assembly 3 includes a needle 31 and a holder 32, and the holder 32 is shaped to fit the needle connector 11, but has a gap with the first sidewall 111 to sealingly engage the other sidewalls. Fastening bolt 6 drives elastic connection sleeve 4 top and supports on fixing base 32, and other lateral walls of fixing base 32 and the sealed laminating of the inner wall that corresponds of syringe needle connecting piece 11 because elastic connection sleeve 4 enters into the clearance, consequently, realized fixing base 32 and syringe needle connecting piece 11's sealing connection, the emergence is leaked when avoiding injecting the medicament.

Further, in the present embodiment, as shown in fig. 1 and 2, the lower section of the needle 31 is fixed in the holder 32 and communicates with the outside. Specifically, the fixed seat 32 has a second passage 321 inside, the lower section of the needle 31 is fixed in the second passage 321, and the outer wall of the needle 31 is connected with the inner wall of the second passage 321 in a sealing manner, so that the liquid medicine can enter the needle conduit through the second passage 321 and then be injected into the muscle. In order to facilitate the collection of the liquid medicine, the bottom of the fixed seat 32 is provided with a trumpet-shaped collecting groove, the large end of the collecting groove faces the push rod 2, the small end of the collecting groove is communicated with the second channel 321, the liquid medicine can be collected from the collecting groove and then enters the pipeline of the needle head 31, and the liquid medicine can enter the pipeline of the needle head 31 more smoothly.

Further, in the present embodiment, in order to increase the screwing length of the fastening bolt 6, so that the fastening bolt 6 is connected more stably, the sidewall of the needle head connector 11 may be thicker than the sidewall of the needle head connector 11 of a common syringe, for example, may be increased to 2mm to 1 cm. Or, instead of increasing the wall thickness of the needle connector 11, an annular fixing sleeve 5 is added, which is fixed to the injection end of the syringe barrel 1 and is provided with a first channel 51 corresponding to the first opening 112, the first channel 51 has an internal thread, and the fastening bolt 6 can be screwed into the first channel 51, so as to drive the elastic connecting sleeve 4 to be screwed into the first opening 112, and make it abut against the fixing seat 32. Therefore, the screwing length of the fastening bolt 6 is increased by the first channel 51, so that the fastening bolt 6 can be more stably abutted against the fixed seat 32, and the situation that the needle 31 is unstable or the sealing performance is reduced due to the fact that the fastening bolt 6 is easy to loosen because the thickness of the side wall of the needle head connecting piece 11 is too small is avoided.

In the present embodiment, as shown in fig. 2, the annular fixing sleeve 5 is sleeved on the outer wall of the syringe sleeve 1, and the top end of the annular fixing sleeve 5 is provided with an opening communicated with the needle connector 11 for the needle to pass through, and the height of the annular fixing sleeve 5 is slightly higher than that of the needle connector 11, so that the puncture of the needle 31 is not affected.

Further, as shown in fig. 2, in the present embodiment, the annular fixing cover 5 is bonded to the outer wall of the injection end of the syringe sleeve 1, and the annular fixing cover 5 has a groove matching with the outer wall of the injection end of the syringe sleeve 1. Of course, the annular fixing sleeve 5 can also be formed integrally with the injection end of the syringe sleeve 1. As long as can increase fastening bolt 6's the length of closing soon, make it can push up on the fixing base 32 of syringe needle subassembly 3 more firmly, realize better sealed and do not influence the puncture of syringe needle 31 can, to concrete connected mode, do not limit here.

Further, the self-retracting syringe of the present invention further comprises a protective cap 7 for covering the needle 31. The utility model discloses a self-recovery syringe is in the state shown in figure 1 before using, and the safety cover covers the syringe needle, prevents to stab and pollute, and fastening bolt 6 is in the state of screwing, supports on fixing base 32 with 4 tops of elastic connection cover. After the injection operation of the medical staff is finished, the fastening bolt 6 is unscrewed, the fastening bolt and the elastic connecting sleeve 4 are separated from the fixed seat 32 of the needle assembly 3 and withdrawn from the first opening 112 of the needle connector 11, and then the push rod 2 is pulled, because the size of the needle connector 11 is larger than that of the fixed seat 32, and a certain negative pressure is generated in the cavity of the syringe sleeve 1 when the push rod 2 is pulled, so that the needle assembly 3 can easily fall into the cavity of the syringe sleeve 1. The push rod 2 is pulled continuously, after the needle assembly 3 completely falls into the syringe sleeve 1, the pulling is stopped, the protective cover 7 is covered on the needle connecting piece 11, and the self-recovery of the needle 31 is realized. Therefore, the syringe in the utility model can recover the needle head into the syringe sleeve 1, avoids the stabbing of medical care personnel and cleaning personnel, and has simple and convenient operation.

To sum up, the utility model provides a syringe needle self-recovery syringe, needle subassembly 3 have a clearance with first lateral wall 111 of needle connecting piece 11 for the size of needle connecting piece 11 is a bit bigger than needle subassembly 3's size, and needle subassembly 3 can drop downwards. The elastic connecting sleeve 4 is sleeved on the outer wall of the needle head connecting piece 11, so that the fastening bolt 6 can prop the elastic connecting sleeve 4 against the needle head component 3, sealing is realized, and leakage of a medicament is avoided. The annular fixing sleeve 5 provides the first passage 51 with internal threads, so that the fastening bolt 6 can be screwed into the first passage 51, the screwing length of the fastening bolt 6 is increased, the fastening bolt can be screwed and fixed more stably, and the sealing performance of the needle head assembly 3 and the inner wall of the needle head connecting piece 11 is enhanced. Through the arrangement, the utility model provides a syringe is after using, through the pine of unscrewing and pulling push rod 2 downwards, syringe needle subassembly 3 can fall into syringe sleeve 1's cavity automatically in, has realized that syringe needle 31 is from retrieving, can avoid medical personnel or the personnel of keeping a public place clean to be pricked by the syringe needle very effectively, has avoided the risk of contacting the liquid medicine infection simultaneously, and it is very simple and convenient to operate.

Exemplary embodiments of a needle self-retracting syringe as set forth in the present invention are described and/or illustrated in detail above. Embodiments of the invention are not limited to the specific embodiments described herein, but rather, components and/or steps of each embodiment may be utilized independently and separately from other components and/or steps described herein. Each component and/or step of one embodiment can also be used in combination with other components and/or steps of other embodiments. When introducing elements/components/etc. described and/or illustrated herein, the articles "a," "an," and "the" are intended to mean that there are one or more of the elements/components/etc. The terms "comprising," "including," and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc. Furthermore, the terms "first" and "second" and the like in the claims and the description are used merely as labels, and are not numerical limitations of their objects.

It is to be understood that the invention is not limited in its application to the details of construction and the arrangement of components set forth in the description. The present invention is capable of other embodiments and of being practiced and carried out in a variety of ways. The foregoing variations and modifications fall within the scope of the present invention. It will be understood that the invention disclosed and defined in this specification extends to all alternative combinations of two or more of the individual features mentioned or evident from the text and/or drawings. All of these different combinations constitute various alternative aspects of the present invention. The embodiments set forth herein explain the best modes known for practicing the invention and will enable others skilled in the art to utilize the invention.

Claims (10)

1. A needle self-retracting syringe comprising:

the syringe comprises a syringe sleeve, a syringe needle connecting piece and a syringe needle connecting piece, wherein the injection end part of the syringe sleeve is provided with a hollow needle connecting piece, and a first opening is arranged on a first side wall of the needle connecting piece;

the push rod is arranged in the syringe sleeve in a sliding mode and is in sealing fit with the inner wall of the syringe sleeve;

the needle head assembly is arranged in the needle head connecting piece in a matched mode at one end part and only has a gap with the first side wall;

the elastic connecting sleeve is sleeved on the outer wall of the needle head connecting piece;

and when the fastening bolt is in a screwing state, the elastic connecting sleeve is propped against the position corresponding to the first opening on the elastic connecting sleeve, so that the elastic connecting sleeve at the position passes through the first opening and is propped against the needle head assembly, the needle head assembly is hermetically fixed on the inner wall of the needle head connecting piece, and when the fastening bolt is in a unscrewing state, the needle head assembly falls into the syringe sleeve.

2. The needle self-retracting syringe of claim 1, wherein the area of the first opening is larger than the cross-sectional area of the stud of the fastening bolt, so that the fastening bolt can abut the elastic connecting sleeve against the needle assembly.

3. The needle self-retracting syringe of claim 1, wherein the needle attachment member is square or rectangular in cross-section.

4. The needle self-retracting syringe of claim 3, wherein the needle assembly comprises a needle and a holder, the lower section of the needle being secured in the holder and communicating with the exterior.

5. The needle self-retracting syringe of claim 4, wherein the holder is cooperatively disposed in the needle attachment member with a clearance only from the first sidewall.

6. The needle self-retracting syringe of claim 5, wherein the holder has a second channel in the center thereof, and the lower section of the needle is fixedly connected to the second channel.

7. The needle self-retracting syringe of claim 6, wherein the base of the holder has a flared manifold in communication with the bottom end of the needle.

8. The needle self-retracting syringe of any one of claims 4 to 7, further comprising an annular retainer fixedly secured to the injection end of the syringe barrel and provided with a first passage corresponding to the first opening, the first passage having an internal thread, the fastening bolt being arranged to be screwed into the first passage.

9. The needle self-retracting syringe of claim 8 wherein the top end of said annular hub has an opening for the passage of said needle therethrough.

10. The needle self-retracting syringe of claim 9, wherein the annular retainer is bonded to or integrally formed with an outer wall of the injection end of the syringe barrel.

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