CN213554488U

CN213554488U - Puncture-proof needle

Info

Publication number: CN213554488U
Application number: CN202021216957.7U
Authority: CN
Inventors: 华玲玲
Original assignee: Hangzhou Fuyang Hosiptal Of Traditional Chinese Medical Orthopedics
Current assignee: Hangzhou Fuyang Hosiptal Of Traditional Chinese Medical Orthopedics
Priority date: 2020-06-28
Filing date: 2020-06-28
Publication date: 2021-06-29
Anticipated expiration: 2030-06-28

Abstract

The utility model provides a prevent stinging syringe needle, it has solved and has prevented the comparatively complicated scheduling problem of stinging structure of stinging syringe needle, include the pintle of being connected with the syringe, the pintle front end is connected with the needle bar, pintle one side has and is rectangular slice and for the protective body of pintle circumference swing to needle bar lateral part, protective body length size is greater than the length size of needle bar, and the protective body has along the needle groove that the setting of protection axial extension just supplied the needle bar card to go into towards one side of needle bar, and the protective body is equipped with the positioning mechanism who is used for fixing a position the protective body in pintle one side with the one end of pintle, and be equipped with the easy peeling means of needle bar between protective body and/or protective body and the positioning mechanism. The utility model has the advantages of simple structure, good needling prevention effect, rapid needle bar separation and the like.

Description

Puncture-proof needle

Technical Field

The utility model belongs to the technical field of medical instrument, concretely relates to prevent stinging syringe needle.

Background

The needle head is a hollow metal needle with a freely detachable syringe head end. For safety and hygiene, the disposable needle should be discarded after use and not be reused. The needle head in the prior art mostly comprises a needle tube which is hollow and used for conveying liquid, one end of the needle tube is a sharp end so as to be conveniently inserted into corresponding tissues such as human tissues, and the other end of the needle tube is fixed on corresponding needles such as an injector, an infusion set, a puncture needle and the like. These medical devices are used and handled not only by professionals in medical institutions, but often by non-professionals at home. Most of disposable syringes in the prior art have the needle exposed outside after being unpacked, and after injection, the needle is also exposed outside, so that related personnel are easily stabbed, and great difficulty is caused to collection and treatment of medical care or cleaning personnel. In addition, the conventional puncture-proof needle head has a complex structure and high cost, and is inconvenient for large-scale application.

In order to solve the defects of the prior art, people have long searched for and put forward various solutions. For example, the chinese patent document discloses a disposable needle-stick-resistant and self-sealing arterial blood collection needle [201720574895.9], which comprises a piston, a sleeve, a self-sealing device, a needle holder, a needle clip, a needle cover, and a hinge shaft; wherein: the piston is connected with the sleeve in a sliding and sealing manner, the automatic plugging device is arranged in a pipe orifice at the front end of the sleeve, and the pipe orifice at the front end is provided with internal threads; the syringe needle seat is connected with the front end pipe orifice of the sleeve through threads, the syringe needle is fixedly connected with the syringe needle seat, the syringe needle cover is connected with the syringe needle seat through a hinge shaft, and the syringe needle clamp used for clamping the syringe needle is arranged inside the syringe needle cover.

The above solution solves the problem of needle stick prevention to some extent, but the solution still has a lot of defects. For example, the structure is complex, the cost is high, and the like.

Disclosure of Invention

The utility model aims at the above problem, provide a reasonable in design, simple structure prevents stinging syringe needle.

In order to achieve the above purpose, the utility model adopts the following technical proposal: this anti-prick needle head, including the pintle be connected with the syringe, the pintle front end is connected with the needle bar, pintle one side has and is rectangular slice and for the protective body of pintle circumference swing to the needle bar lateral part, protective body length size is greater than the length size of needle bar, and the protective body has along the needle groove that protective shaft extended the setting and supply the needle bar card to go into towards one side of needle bar, and the protective body is equipped with the positioning mechanism who is used for fixing a position the protective body in pintle one side with the one end of pintle, and be equipped with the easy peeling means of needle bar between protective body and/or protective body and the positioning mechanism. The needle bar is clamped and positioned in the needle groove to achieve the purpose of preventing needle prick, meanwhile, the positioning mechanism can connect the protection body and the pintle to prevent the needle groove and the needle bar from being separated from each other, and when the needle bar is required to be separated from the needle groove, the needle bar and the needle groove can be separated through the needle bar easily-peeling mechanism.

In foretell prevent stinging syringe needle, positioning mechanism includes a plurality of vertical settings at the fixed strip of pintle side, and the one side lower extreme that the protective body is relative with the pintle is provided with a plurality of strengthening ribs, and the strengthening rib has a plurality of distributions at the vertical retort of protective body both sides and sets up the horizontal bar between the vertical retort, is provided with a plurality of sand grips between the strengthening rib, be the fixed slot with the fixed strip joint between the sand grip. The pintle passes through the fixed slot of positioning mechanism joint between the strengthening rib, when guaranteeing the demand of preventing stinging, has simplified the structure of joint department.

In the above-mentioned anti-prick needle head, the needle bar easy-peeling mechanism includes a groove disposed on one side of the protection body opposite to the needle bar and located between the fixing groove and the needle groove, the groove is respectively communicated with the fixing groove and the needle groove, and the needle bar axially passes through the groove, a through hole is disposed at the center of the groove, one side of the through hole is connected with a pushing block corresponding to the needle bar, and a gap is formed between the other side of the through hole and the pushing block. The needle bar is clamped in the groove of the protective body, and the needle bar can be pressed to be separated from the needle groove when the needle bar is required to be separated from the needle groove.

In the above anti-prick needle head, the needle bar easily-peeling mechanism further comprises a notch which is arranged on one side of the protective body far away from the needle bar and communicated with the needle groove, and a pushing sheet which is opposite to the needle groove is arranged in the notch. When the needle bar is required to be separated from the needle groove, the pushing piece on the needle groove is pressed to eject the needle bar.

In the above stab-resistant needle head, the protector is integrally formed with the pintle and is made of a flexible sheet material; or the protective body is made of hard materials, the joint of the protective body and the pintle is made of flexible sheet materials, the width of one end of the protective body close to the pintle is larger than that of one end of the protective body far away from the pintle, and the thickness of one end of the protective body close to the pintle is smaller than that of one end of the protective body far away from the pintle. The thickness of the bottom of the protective body is smaller, the flexibility of the joint of the protective body is improved, and the reinforcing ribs, the convex strips and the side faces of the pintle are attached.

In the puncture-proof needle head, the needle sleeve is sleeved outside the needle rod, the bottom of the needle sleeve is connected with the pintle through the clamping mechanism, the clamping ring is arranged at the bottom of the needle sleeve, and the lower end of the clamping ring is attached to and pressed against the pintle and/or the joint of the protective body and the pintle. The clamping ring ensures the structural strength of the bottom of the needle sleeve and improves the sealing property of the joint of the needle sleeve.

In the puncture-proof needle head, a plurality of reinforcing strips which are symmetrical relative to the central axis of the needle sleeve are uniformly distributed on the outer side of the needle sleeve. The reinforcing strips are distributed along the axial direction of the needle sleeve, so that the structural strength of the needle sleeve is improved.

In the puncture-proof needle head, the needle sleeve comprises a plurality of sections of cylinders or conical cylinders which are connected end to end, and the diameter of the needle sleeve is sequentially reduced from the opening to the closed end. The needle sleeve is gradually contracted from the bottom to the end part, thereby effectively protecting the needle rod.

In the puncture-proof needle head, the clamping mechanism comprises a plurality of clamping strips which are distributed on the inner side of the needle sleeve and clamped with the fixing strips on the side surfaces of the pintle in a one-to-one correspondence manner. The fixing strip is fixedly spliced with the clamping strip, so that the needle sleeve is prevented from rotating circumferentially relative to the pintle.

In the anti-prick needle head, the bottom of the pintle is provided with a limit ring attached to the injector, the joint of the pintle and the needle rod is provided with a reinforced joint, the end head of the needle rod is an oblique-cut needle head, and the end head of the protective body is internally provided with a bayonet opposite to the end part of the needle head. The limit ring firmly fixes the pintle at the injection port of the injector, and the reinforcing section prevents the joint of the pintle and the needle rod from being broken.

Compared with the prior art, the utility model has the advantages of: the positioning mechanism has a simple structure, ensures puncture prevention, simplifies the structure and reduces the production cost; the needle bar can be quickly separated from the needle groove, the lower end of the needle sleeve is attached to the pintle through the clamping ring, the sealing performance is improved, and the cleanness of the needle bar is ensured; the needle cover outside is provided with the enhancement strip, and the bottom is provided with the joint ring, has improved the structural strength of needle cover.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic structural view of another viewing angle of the present invention;

fig. 3 is a schematic structural view of another viewing angle of the present invention;

fig. 4 is a schematic view of the internal structure of the present invention;

in the figure, a pintle 1, a limiting ring 11, a reinforcing section 12, a needle rod 2, a needle 21, a bayonet 22, a needle sleeve 3, a clamping ring 31, a reinforcing strip 32, a clamping mechanism 4, a clamping strip 41, a protective body 5, a positioning mechanism 6, a fixing strip 61, a convex strip 62, a fixing groove 63, a groove 64, a pushing block 65, a needle groove 66, a notch 67, a pushing sheet 68, a reinforcing rib 7, a vertical strip 71 and a transverse strip 72.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-4, the anti-prick needle head comprises a pintle 1 connected with an injector, a needle bar 2 is connected with the front end of the pintle 1, a protective body 5 which is in a long strip shape and swings to the side part of the needle bar 2 relative to the pintle 1 in the circumferential direction is arranged on one side of the pintle 1, the length of the protective body 5 is larger than that of the needle bar 2, a needle groove 66 which is arranged along the axial direction of the protective body 5 and is used for clamping the needle bar 2 is arranged on one side of the protective body 5 facing the needle bar 2, a positioning mechanism 6 used for positioning the protective body 5 on one side of the pintle 1 is arranged at one end of the protective body 5 and the pintle 1, and a needle bar peeling mechanism is arranged between the protective body 5 and/or the protective body. In this embodiment, the needle bar 2 is clamped and positioned in the needle groove 66 to achieve the purpose of preventing needle prick, meanwhile, the positioning mechanism 6 can connect the protective body 5 and the pintle 2 to prevent the needle groove 66 and the needle bar 2 from being separated from each other, and when the needle bar 2 needs to be separated from the needle groove 66, the needle bar 2 and the needle groove 66 can be separated through the needle bar easy-to-peel mechanism.

Specifically, positioning mechanism 6 includes a plurality of vertical setting at the fixed strip 61 of pintle 1 side, and the one side lower extreme that the protector 5 is relative with pintle 1 is provided with a plurality of strengthening ribs 7, and strengthening rib 7 has a plurality of vertical bars 71 that distribute in the protector 5 both sides and sets up the horizontal bar 72 between vertical bar 71, is provided with a plurality of sand grips 62 between the strengthening rib 7, is the fixed slot 63 with fixed strip 61 joint between the sand grip 62. The pintle 1 is clamped in the fixing groove 63 between the reinforcing ribs 7 through the positioning mechanism 6, so that the structure of the clamping part is simplified when the requirement of puncture prevention is met.

Wherein, the easy peeling means of needle bar includes setting up in the relative one side of protective body 5 and needle bar 2 and lie in the recess 64 between fixed slot 63 and the needle groove 66, and recess 64 is linked together with fixed slot 63 and needle groove 66 respectively and needle bar 2 axial passes recess 64, and the center of recess 64 has the through-hole, and through-hole one side is connected with the promotion piece 65 corresponding with needle bar 2, and forms the gap between through-hole opposite side and the promotion piece 65. The needle bar 2 is clamped in the groove 64 of the protective body 5, and when the needle bar 2 is required to be separated from the needle groove 66, the pushing block 65 can be pressed to pull out the needle bar 2.

In addition, the needle bar peeling mechanism further comprises a notch 67 which is arranged on one side of the protective body 5 far away from the needle bar 2 and communicated with the needle groove 66, and a pushing piece 68 which is opposite to the needle groove 66 is arranged in the notch 67. When it is desired to disengage the needle bar 2 from the needle groove 66, the pushing piece 68 on the needle groove 66 is pressed for the purpose of ejecting the needle bar 2.

Deeply, the protective body 5 is integrally formed with the pintle 1 and the protective body 5 is made of a flexible sheet material; or the protective body 5 is made of a hard material, the joint of the protective body 5 and the pintle 1 is made of a flexible sheet material, the width of one end of the protective body 5 close to the pintle 1 is larger than that of one end far away from the pintle 1, and the thickness of one end of the protective body 5 close to the pintle 1 is smaller than that of one end far away from the pintle 1. The thickness of the bottom of the protective body 5 is smaller, so that the flexibility of the joint of the protective body is improved, and the reinforcing ribs 7 and the convex strips 62 are ensured to be attached to the side faces of the pintle 1.

Furthermore, the needle bar 2 is externally sleeved with a needle sleeve 3, the bottom of the needle sleeve 3 is connected with the pintle 1 through a clamping mechanism 4, a clamping ring 31 is arranged at the bottom of the needle sleeve 3, and the lower end of the clamping ring 31 is attached to and pressed against the joint of the pintle 1 and/or the protective body 5 and the pintle 1. The clamping ring 31 is in interference fit with the pintle 1, the inner diameter of the clamping ring is slightly smaller than the outer diameter of the pintle 1, the needle sleeve 3 is connected with the pintle 1 in a clamping mode, the clamping ring 31 ensures the structural strength of the bottom of the needle sleeve 3, and meanwhile the sealing performance of the joint of the needle sleeve is improved.

In addition, a plurality of reinforcing strips 32 which are symmetrical relative to the central axis of the needle sleeve 3 are uniformly distributed on the outer side of the needle sleeve 3. The side wall of the needle sleeve 3 is thin, and the weight is reduced and the structural strength is improved by arranging a plurality of vertically extending reinforcing strips 32 on the side surface.

Meanwhile, the needle sleeve 3 comprises a plurality of sections of cylinders or conical cylinders which are connected end to end, and the diameter of the needle sleeve 3 is sequentially reduced from the opening to the closed end. The inner side of the end of the needle sleeve 3 is opposite to the needle head 21, and the cylindrical needle sleeve 3 ensures that the needle rod 2 is not easy to deform and bend.

The latch mechanism 4 can be seen to comprise a plurality of latch strips 41 distributed on the inside of the needle sheath 3 and clamped in a one-to-one correspondence with the fixing strips 61 on the side of the pintle 1. The width of the clamping bar 41 is equal to that of the fixing groove 63, and the needle sleeve 3 is limited to rotate circumferentially relative to the pintle 1.

Preferably, the bottom of the pintle 1 is provided with a limit ring 11 attached to the injector, a reinforcing section 12 is added at the joint of the pintle 1 and the needle bar 2, the end of the needle bar 2 is an oblique-cut needle 21, and a bayonet 22 opposite to the end of the needle 21 is arranged in the end of the protective body 5. The joint of the needle bar 2 and the pintle 1 is a fracture-prone part, and a hard reinforcing joint 12 is additionally added to improve the local strength of the needle bar. Needle 21 snaps into bayonet 22, ensuring that its sharpened tip is completely covered.

In summary, the principle of the present embodiment is: the fixing strip 61 between the reinforcing ribs 7 at the root of the protection body 5, the groove 64 and the needle groove 66 in the middle are respectively clamped with the pintle 1 and the needle bar 2, the anti-needling effect is achieved, the structure is simple, the needle bar 2 and the needle head 21 at the end of the needle bar 2 cannot pierce through the protection body 5, an operator is effectively protected, and when the needle bar 2 needs to be separated from the needle groove 66, the rapid separation of the needle bar 2 and the needle groove 66 can be achieved by pressing the pushing block 65 and the pushing sheet 68.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms pintle 1, stop collar 11, reinforcing section 12, needle shaft 2, needle 21, bayonet 22, needle sheath 3, snap collar 31, reinforcing strip 32, snap mechanism 4, snap strip 41, protective body 5, positioning mechanism 6, fixing strip 61, protruding strip 62, fixing groove 63, groove 64, pushing block 65, needle groove 66, notch 67, pushing piece 68, reinforcing rib 7, vertical strip 71, horizontal strip 72, etc. are used more often, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. An anti-puncture needle head comprises a pintle (1) connected with an injector, the front end of the pintle (1) is connected with a needle rod (2), it is characterized in that one side of the pintle (1) is provided with a protective body (5) which is in a strip sheet shape and swings to the side part of the needle rod (2) relative to the pintle (1) in the circumferential direction, the length of the protective body (5) is larger than that of the needle bar (2), and one side of the protective body (5) facing the needle bar (2) is provided with a needle groove (66) which is arranged along the axial direction of the protective body (5) and is used for the needle bar (2) to be clamped in, and one end of the protective body (5) and the pintle (1) is provided with a positioning mechanism (6) for positioning the protective body (5) at one side of the pintle (1), and a needle bar peeling mechanism is arranged between the protective body (5) and/or the protective body (5) and the positioning mechanism (6).

2. The puncture-proof needle head as claimed in claim 1, wherein the positioning mechanism (6) comprises a plurality of vertical fixing strips (61) arranged on the side surface of the pintle (1), the lower end of one side of the protective body (5) opposite to the pintle (1) is provided with a plurality of reinforcing ribs (7), each reinforcing rib (7) is provided with a plurality of vertical strips (71) distributed on two sides of the protective body (5) and transverse strips (72) arranged between the vertical strips (71), a plurality of convex strips (62) are arranged between the reinforcing ribs (7), and fixing grooves (63) clamped with the fixing strips (61) are formed between the convex strips (62).

3. The anti-prick needle according to claim 2, characterized in that the needle bar easy-peeling mechanism comprises a groove (64) which is arranged on one side of the protective body (5) opposite to the needle bar (2) and is positioned between the fixing groove (63) and the needle groove (66), the groove (64) is respectively communicated with the fixing groove (63) and the needle groove (66), the needle bar (2) axially passes through the groove (64), the center of the groove (64) is provided with a through hole, one side of the through hole is connected with a pushing block (65) corresponding to the needle bar (2), and a gap is formed between the other side of the through hole and the pushing block (65).

4. A puncture needle according to claim 2, wherein the needle shaft peel-off facilitating mechanism further comprises a notch (67) provided on a side of the protective body (5) remote from the needle shaft (2) and communicating with the needle groove (66), the notch (67) having therein a push piece (68) opposed to the needle groove (66).

5. A needlepoint as claimed in claim 1 or claim 2 or claim 3 or claim 4, characterised in that the protective body (5) is formed integrally with the pintle (1) and the protective body (5) is formed from a flexible sheet material; or, the protective body (5) is made of hard materials, the joint of the protective body (5) and the pintle (1) is made of flexible sheet materials, the width of one end, close to the pintle (1), of the protective body (5) is larger than that of one end, far away from the pintle (1), of the protective body (5), and the thickness of one end, close to the pintle (1), of the protective body (5) is smaller than that of one end, far away from the pintle (1).

6. The puncture-proof needle head according to claim 5, characterized in that the needle bar (2) is sleeved with a needle sleeve (3) and the bottom of the needle sleeve (3) is connected with the pintle (1) through a clamping mechanism (4), a clamping ring (31) is arranged at the bottom of the needle sleeve (3), and the lower end of the clamping ring (31) is attached to and pressed against the joint of the pintle (1) and/or the protective body (5) and the pintle (1).

7. A puncture needle according to claim 6, characterized in that a plurality of reinforcing strips (32) which are symmetrical with respect to the central axis of the needle sheath (3) are uniformly distributed on the outer side of the needle sheath (3).

8. A puncture needle according to claim 6, characterized in that the sheath (3) comprises several sections of cylinders or cones connected end to end, the diameter of the sheath (3) decreasing from the opening towards the closed end.

9. A puncture needle according to claim 6, wherein the latch mechanism (4) comprises a plurality of latch strips (41) which are distributed on the inner side of the needle sheath (3) and are clamped with the fixing strips (61) on the side of the pintle (1) in a one-to-one correspondence manner.

10. The anti-prick needle according to claim 1, characterized in that the bottom of the pintle (1) is provided with a limit ring (11) attached to the injector, the joint of the pintle (1) and the needle rod (2) is provided with a reinforcing section (12), the end of the needle rod (2) is an oblique-cut needle (21), and the end of the protective body (5) is provided with a bayonet (22) opposite to the end of the needle (21).