TWM545601U - Safety syringe structure - Google Patents

Description

Safety syringe structure

This creation relates to a safety syringe structure. When the syringe is used for injection, the needle at the front end of the syringe can be collected into the syringe to prevent the needle from stabbing others for safety, especially for driving the needle into the needle. The tip of the pusher and the needle retractor in the syringe.

After the injection of the conventional syringe, the needle on the front end of the needle is contaminated with human blood, and the blood may contain bacteria or viruses that can cause illness, so as to prevent the medical staff or others from being infected by the needle. In the case of the medical staff, the needles after use are generally inserted into the needle sleeve of the syringe. However, in the process of inserting the needle into the needle sleeve, the medical staff is likely to accidentally puncture the needle into the hand of the needle sleeve because of carelessness or mental fatigue, causing the medical staff to accidentally contract the disease.

In view of this, the creators of the present invention have developed their own creations to overcome the shortcomings of the prior art described above with their many years of experience in the production, manufacture and design of syringes.

The main purpose of the present invention is to provide a safety injection syringe structure comprising: a syringe having a front end, a rear end and a pipe, the inner wall of the pipe being provided with a stop portion adjacent to the rear end, the pipe being at the front end a first neck opening having a reduced diameter, a first annular surface facing the rear end between the first neck opening and the inner wall of the pipe; a needle retractor having a first end and a second end a through hole connecting the first end and the second end, wherein the first end is provided with a ring groove at a periphery of the through hole, so that the inner wall of the ring groove forms an opposite inner ring surface and an outer ring surface, and the inner ring surface is adjacent to the ring surface a through hole, the outer ring surface is provided with a threaded section, the through hole is provided with a second neck opening at the second end, and a second ring facing the first end is disposed between the second neck opening and the inner wall of the through hole The needle retractor is slidably disposed in the pipe such that the first end abuts the first annular surface of the syringe, so that the first toroidal surface blocks the needle retractor from being removed from the pipe by the first neck port, and The two ends are facing the rear end of the syringe; a valve plug sleeve is sleeved on the needle retractor End, as the needle retractor is slidably disposed in the pipe, the valve plug sleeve is watertight between the second end of the needle retractor and the inner wall of the pipe; a needle having a fixing sleeve and connecting the fixing sleeve An injection needle, the sleeve is internally provided with a hole for engaging the inner ring surface, the sleeve hole communicates with the injection needle, and a flange is arranged on the outer wall of the fixing sleeve to be screwed with the thread segment; a push rod is slidably disposed in the pipe, the push rod extends at one end to form a pointed head, and a plug body is disposed, the plug body is oriented toward the second end of the retractor, and the pointed head is directed to the retractor The second neckline direction is disposed outside the plug body.

By the above, the tip can be moved to the front end of the syringe with the push rod, and the tip is inserted and fastened to the second neck of the needle remover, and the tip can be moved along with the push rod To the rear end of the barrel, the tip is moved by the needle to move the needle into the tube, and the stop interferes with the needle retracting from the rear end of the barrel. According to this, the used needle can be easily and surely stored to improve the safety after the syringe is injected, and to improve the situation in which the conventional needle is easily stabbed.

In the safety syringe barrel structure, the outer wall of the second end of the needle retractor is provided with an annular fitting groove, and the valve plug sleeve is embedded in the annular fitting groove.

According to the safety syringe barrel structure, the inner wall of the tube is located at a front end of the barrel, and an interference portion is formed which can interfere with the movement of the valve sleeve. The interference portion is a convex, a rib and a convex ring. One.

According to the safety syringe structure described above, one end of the push rod extends through a weakly reduced diameter section to form the pointed head, and the push rod can be broken when the push rod is moved from the rear end of the syringe to the pipe. The weakened diameter reducing section allows the needle retractor and the needle to be housed in the duct.

According to the safety injection syringe structure described above, the push rod, the weakened diameter reducing section and the pointed head are integrally formed.

The safety injection syringe structure is described, the pointed head is provided with a barb facing the plug body, and the second annular surface can be fastened.

In accordance with the safety syringe structure described above, the pointed head can be formed in the form of an arrow.

In the safety syringe barrel structure, the second neck inner wall collar is provided with a plurality of sheets extending toward the center of the second neck opening, such that the sheets form a central hole in the center of the second neck opening. A narrow groove is formed between each of the sheets.

In the safety syringe structure described above, the second neck opening can be reduced in diameter from the second end to the first end, and the second end communicates with the second neck opening via a ring slope.

According to the safety syringe structure described above, the stopping portion is one of a convex ridge, a rib and a convex ring, and the plug body is provided with a concave portion into which the stopping portion can be fitted.

In order to be able to clearly and fully disclose the present creation, and to illustrate the preferred embodiment, a detailed description of the embodiments will be described as follows:

Referring to the first to fifth figures, the drawings of the present embodiment are disclosed. The safety injection syringe structure of the present invention is illustrated by the above drawings, including a syringe 1, a needle retractor 2, a needle 3, and a push. The combined structure of the rod 4 and a valve plug sleeve 6. The two ends of the barrel 1 respectively have a front end 11, a rear end 12, and a pipe 13 connecting the front end 11 and the rear end 12 of the barrel 1. The inner wall of the tube 13 is adjacent to the rear end 12 of the barrel 1. a stop portion 14 is provided. The stop portion 14 can be a convex rib, a convex rib or a convex ring. The pipe 13 is provided with a first neck portion 15 having a reduced diameter at a portion of the front end 11 of the syringe 1. A first annular surface 151 is disposed between the neck portion 15 and the inner wall of the pipe 13 toward the rear end 12 of the barrel 1.

The two ends of the needle retractor 2 respectively have a first end 21, a second end 22, and a through hole 23 communicating with the first end 21 and the second end 22 of the retractor 2, the retractor 2 The first end 21 is provided with a ring groove 24 at the periphery of the through hole 23, so that the inner wall of the ring groove 24 forms a corresponding inner ring surface 241 and an outer ring surface 242, and the inner ring surface 241 abuts the through hole 23, The outer ring surface 242 is provided with a threaded section 243; the through hole 23 is provided with a second neck opening 25 at the second end 22 of the needle retractor 2, and the second neck opening 25 can be passed from the second end 22 of the needle retractor 2 The first end 21 is reduced in diameter, and the second end 22 of the needle retractor 2 communicates with the second neck opening 25 via a ring slope 251; a second annular surface 252 is defined between the second neck opening 25 and the inner wall of the through hole 23. , facing the first end 21 of the needle catcher 2. The needle retractor 2 is slidably disposed in the tube 13 of the barrel 1 such that the first end 21 of the needle retractor 2 abuts against the first annular surface 151 of the barrel 1 such that the first torus 151 of the barrel 1 The needle retractor 2 can be prevented from being removed from the pipe 13 by the first neck opening 15, and the second end 22 of the needle retractor 2 faces the rear end 12 of the barrel 1. The outer wall of the needle retractor 2 is not closely attached to the needle Syringe 1 The inner wall of the pipe 13.

The outer wall of the second end 22 of the needle retractor 2 is provided with an annular fitting groove 221, and the valve plug sleeve 6 is embedded in the annular fitting groove 221, and the valve plug sleeve 6 is slidably disposed in the syringe with the needle removing device 2 1 in the pipe 13, so that the valve sleeve 6 is closely abutted against the inner wall of the pipe 13 of the cylinder 1, so that the valve sleeve 6 is between the outer wall of the second end 22 of the needle retractor 2 and the inner wall of the pipe 13 of the syringe 1 The watertightness is generated to prevent the medicament from leaking out of the first neck opening 15 of the tube 13 of the syringe 1.

The needle 3 has a fixing sleeve 31 and an injection needle 32 connected to the fixing sleeve 31. The fixing sleeve 31 is internally provided with a hole 311 which can be fitted on the inner ring surface 241 of the needle removing device 2, and the sleeve The hole 311 communicates with the injection needle 32; and the outer wall of the fixing sleeve 31 is provided with a flange 312, and the fixing sleeve 31 is screwed by the flange 312 to the threaded section 243 of the needle retractor 2.

The push rod 4 can be slidably disposed in the pipe 13, and the push rod 4 is extended at one end to form a pointed head 41, and a plug body 5 made of rubber or rubber is disposed, so that the plug body 5 faces the needle catcher 2 a second end 22, and the tip portion 41 is disposed outside the plug body 5 in the direction of the second neck opening 25 (or the ring slope surface 251) of the needle catcher 2, so that the tip portion 41 is exposed outside the plug body 5; The head portion 41 can be disposed in the shape of an arrow, and the tip portion 41 is provided with a barb 412 facing the plug body 5, and the second ring surface 252 of the second neck opening 25 can be fastened; The recess 51 can fit the stopper portion 14 of the syringe 1 to remove the brake plug 5 from the duct 13. The other end of the push rod 4 is provided with a push portion 42 that can be operated by a person.

Referring to the sixth figure, when the person operates the push rod 4 to drive the plug body 5 along the pipe 13 to the front end 11 of the syringe 1, the plug body 5 can pass the medicine in the pipe 13 through the needle retractor 2 The needle necks 32 of the two necks 25, the through holes 23 and the needles 3 are pushed into the outside or human blood vessels. Referring to the seventh figure, when the injection of the medicament in the syringe 1 is completed, the tip 41 can be moved to the front end 11 of the cylinder 1 along with the push rod 4, so that the tip 41 can be inserted through the loop slope 251. The second neck opening 25 of the needle 2 is such that the barb 412 of the pointed head 41 is fastened to the second annulus 252 after passing through the second neck opening 25.

Referring to the eighth figure, when the person operates the push rod 4 to move the plug body 5 along the pipe 13 to the rear end 12 of the syringe 1, the tip portion 41 can be moved to the syringe 1 along with the push rod 4. The rear end 12 causes the tip end 41 to push the second toroidal surface 252 of the needle retractor 2 with the barb 412 toward the rear end 12 of the barrel 1 such that the tip 41 drives the needle 3 via the needle retractor 2 (fixed The sleeve 31 and the injection needle 32) are moved into the pipe 13. Referring to the ninth figure, when the plug body 5 is moved to the rear end 12 of the barrel 1, the stop portion 14 of the tube 13 interferes with the second end 22 of the needle retractor 2 to brake the needle retractor 2 The pipe 13 is removed from the rear end 12 of the cylinder 1.

According to this, it is possible to reliably store the used needle 3 inside the syringe 1 to improve the safety after the syringe 1 is injected, and to improve the situation in which the conventional needle is easily stabbed. Further, it is only necessary to operate the pusher 4 to move to the rear end 12 of the syringe 1 to complete the action of collecting the needle 3 into the syringe 1, and thus it is quite simple in operation.

As shown in the fourth figure, in a possible embodiment, the inner wall of the tube 1 of the syringe 1 is located at a position of the front end 11 of the barrel 1 and is provided with an interference portion 131, which may be a convex rib or a rib or The collar can interfere with the movement of the valve sleeve 6 along the conduit 13 toward the front end 11 or the rear end 12 of the barrel 1 to brake the needle retractor 2. In particular, when the person operates the push rod 4 (or the plug body 5) to drive the needle 3 to attract the medicament into the tube 13 of the syringe 1 from the outside, the tip portion 41 is not yet inserted into the needle catcher 2 a second neck opening 25, the interference portion 131 can prevent the valve sleeve 6 and the needle retractor 2 from moving toward the rear end 12 of the syringe 1; when the tip portion 41 is inserted into the second neck of the needle retractor 2 25, and when the needle catcher 2 and the valve plug sleeve 6 are moved toward the rear end 12 of the syringe 1, the tip portion 41 can drive the valve sleeve 6 against the frictional force of the interference portion 131, so that the needle catcher 2 And the valve sleeve 6 is smoothly displaced to the rear end 12 of the barrel 1.

Please refer to the second, eighth and ninth drawings. In another possible embodiment, one end of the push rod 4 can be extended via a weakly reduced diameter section 413 to form the pointed head 41. The push rod 4 is weakly reduced. The diameter section 413 and the pointed head 41 can be integrally formed of a plastic material, and the structure is rather streamlined. As such, the pointed head 41 (or the weakened reduced diameter section 413) can be directly inserted into the second neck opening 25 of the needle retractor 2 without penetrating any object (eg, the plug body 5); The strength of the material of the plug body 5 (made of silicone or rubber) may be higher than the material (plastic) strength of the pointed head 41 and the weakened diameter reducing section 413. If the pointed head 41 must first penetrate the plug body 5, Insertion of the second neck opening 25 of the needle catcher 2 may cause the tip portion 41 to not easily penetrate the plug body 5 or cause the weakened diameter reducing section 413 to be crushed by the plug body 5 to be broken. It can be understood that the weakened diameter reducing section 413 has the characteristic of being easily broken. When the push rod 4 drives the plug body 5 to move out of the pipe 13 from the rear end 12 of the cylinder 1, the push rod 4 can be pushed to the syringe. When the 1 is pulled laterally, the weakly reduced diameter section 413 can be quickly and easily broken, and the pointed head 41 is easily separated from the push rod 4, so that the needle catcher 2 and the needle 3 are housed in the duct 13. The operation is simple, and the overall length of the syringe 1 is reduced to facilitate collection and treatment of medical waste.

As shown in the fourth and fifth figures, in another possible embodiment, the inner wall of the second neck opening 25 is provided with a plurality of sheets 253 extending toward the center of the second neck opening 25, so that the sheets 253 are The center of the second neck opening 25 defines a central hole 254, and a thin groove 255 is formed between each of the sheets 253. As shown in the sixth to eighth figures, when the tip portion 41 is inserted into the second neck opening 25 of the needle catcher 2, the tip portion 41 is inserted into the through hole 23 via the center hole 254, during which the tip portion 41 is inserted. The sheet 253 can be pushed and twisted in the direction of the through hole 23, and the sheet 253 is tightly sandwiched between the tip portion 41 and the weakened diameter reducing portion 413, thereby reinforcing the tip portion 41 to be inserted into the needle catcher 2 The stability of the second neck opening 25 prevents the pointed head 41 from being disengaged from the second neck opening 25.

However, the above descriptions are only preferred embodiments of the present invention. When it is not possible to limit the scope of the creation of the creation, the changes and modifications that can be made by those who are familiar with the industry should be regarded as not deviating. The substance of this creation.

1‧‧‧Syringe
11‧‧‧ front end
12‧‧‧ Backend
13‧‧‧ Pipes
131‧‧‧Interference Department
14‧‧‧stop
15‧‧‧First neck
151‧‧‧ first torus
2‧‧‧ Needle remover
21‧‧‧ first end
22‧‧‧ second end
221‧‧‧ring slot
23‧‧‧through hole
24‧‧‧ Ring groove
241‧‧‧ Inner torus
242‧‧‧ outer annulus
243‧‧ Thread segment
25‧‧‧Second neck
251‧‧‧ring bevel
252‧‧‧second torus
253‧‧‧Sheet
254‧‧‧Central hole
255‧‧‧ rill
3‧‧‧ needle
31‧‧‧ fixed sets
311‧‧‧ Set of holes
312‧‧‧Flange
32‧‧‧Injection needle
4‧‧‧Put
41‧‧‧ pointed head
412‧‧‧ Barb
413‧‧‧ Weakly reduced diameter section
42‧‧‧Pushing Department
5‧‧‧ body
51‧‧‧ recess
6‧‧‧ valve sleeve

The first figure is a perspective view of a preferred embodiment of the creation. The second figure is an exploded perspective view of the first figure. The third figure is a cross-sectional view of the first figure. The fourth figure is a partially enlarged cross-sectional view of the third figure. The fifth figure is an enlarged perspective view of the needle retractor of the second figure. The sixth figure is a cross-sectional view showing the state of use of the third figure. The seventh figure is a cross-sectional view of the second use state of the sixth figure. The eighth figure is a cross-sectional view of the next use state of the seventh figure. The ninth drawing is a cross-sectional view of the second use state of the eighth figure.

1‧‧‧Syringe

11‧‧‧ front end

12‧‧‧ Backend

13‧‧‧ Pipes

14‧‧‧stop

2‧‧‧ Needle remover

21‧‧‧ first end

22‧‧‧ second end

221‧‧‧ring slot

25‧‧‧Second neck

251‧‧‧ring bevel

3‧‧‧ needle

31‧‧‧ fixed sets

311‧‧‧ Set of holes

312‧‧‧Flange

32‧‧‧Injection needle

4‧‧‧Put

41‧‧‧ pointed head

412‧‧‧ Barb

413‧‧‧ Weakly reduced diameter section

42‧‧‧Pushing Department

5‧‧‧ body

51‧‧‧ recess

6‧‧‧ valve sleeve

Claims (10)

A safety injection syringe structure comprises: a syringe having a front end, a rear end and a pipe, wherein a portion of the inner wall of the pipe adjacent to the rear end is provided with a stop portion, and the pipe is provided with a reduced diameter at the front end portion a first neck opening, a first annular surface facing the rear end between the first neck opening and the inner wall of the pipe; a needle catcher having a first end, a second end, and the first end and the first end a through hole at the two ends, the first end is provided with a ring groove on the periphery of the through hole, such that the inner wall of the ring groove forms an opposite inner ring surface and an outer ring surface, and the inner ring surface abuts the through hole, the outer ring surface a threaded section is provided, the through hole is provided with a second neck opening at the second end, and a second annular surface facing the first end is disposed between the second neck opening and the inner wall of the through hole, and the needle retractor slides Provided in the pipe, the first end abuts the first annular surface of the syringe, so that the first annular surface blocks the needle retractor from being removed from the pipe by the first neck, and the second end faces the syringe a valve plug sleeve sleeved on the second end of the needle retractor, with the needle retractor sliding Inside the pipe, the valve plug is made watertight between the second end of the needle retractor and the inner wall of the pipe; a needle having a fixing sleeve and an injection needle connecting the fixing sleeve, the sleeve is internally provided with a set a hole, which is engaged with the inner ring surface, the sleeve hole communicates with the injection needle, and a flange is arranged on the outer wall of the fixing sleeve to be screwed with the thread segment; and a push rod is slidably disposed in the pipe. One end of the push rod extends to form a pointed head, and a plug body is disposed to face the second end of the retractor, and the pointed end is disposed outside the plug body in the direction of the second neck of the retractor The tip can be moved toward the front end of the barrel with the push rod, the tip is inserted into and fastened to the second neck of the needle remover, and the pointed head can be moved to the needle along with the push rod The rear end of the barrel causes the tip to move the needle into the tube via the needle catcher, and the stop interferes with the needle remover from the rear end of the barrel. The safety injection syringe structure according to claim 1, wherein the outer wall of the second end of the needle retractor is provided with an annular fitting groove, and the valve sleeve is sleeved in the annular insertion groove. The safety syringe barrel structure according to claim 1, wherein the inner wall of the tube is located at a front end of the barrel, and an interference portion capable of interfering with the movement of the valve sleeve is provided, and the interference portion is a convex rib and a rib. One of the convex rings. The safety injection syringe structure of claim 1, wherein one end of the push rod extends through a weakly reduced diameter section to form the pointed head, and the push rod drives the plug body to be removed from the rear end of the syringe. In the case of the pipe, the weakened diameter reducing section can be broken, so that the needle catcher and the needle are housed in the pipe. The safety injection syringe structure according to claim 4, wherein the push rod, the weakened diameter reducing section and the pointed head are integrally formed. The safety injection syringe structure according to claim 1, wherein the pointed head is provided with a barb facing the plug body, and the second annular surface can be fastened. The safety injection syringe structure of claim 1, wherein the pointed head is in the form of an arrow. The safety injection syringe structure of claim 1, wherein the second neck inner wall collar is provided with a plurality of sheets extending toward the center of the second neck opening such that the sheets are centered in the second neck opening. Forming a central hole, a narrow groove is formed between each of the sheets. The safety injection syringe structure of claim 1 or 8, wherein the second neck opening is reduced in diameter from the second end to the first end, and the second end is connected to the second neck opening via a ring slope. The safety injection syringe structure according to claim 1, wherein the stopper portion is one of a convex ridge, a convex rib and a convex ring, and the plug body is provided with a concave portion into which the stopper portion can be fitted .