CN1263521C - Airtight safety syringe with double elastic structure - Google Patents

Abstract

The airtight safe syringe cylinder of utensil bielastic structure includes a syringe cylinder, a needle file is installed to a hollow sleeve pipe on its top, the needle file includes a body, there are plural location feathers on the lateral wall of a needle file seat that the body sets up above, there is a syringe needle on the needle file seat, because of the lower end external diameter of the body is greater than the upper end external diameter, make the body closely contact with an airtight shell fragment that the hollow sleeve pipe inboard sets up in order to form good gas tightness, inlay on the locating shell fragment that sets up in the hollow sleeve pipe inboard by the locating groove that sets up on the locating feather, make the needle file install in the hollow sleeve pipe; a push rod is arranged in the syringe, a fixed seat arranged above the push rod is sleeved with an airtight piston, and the upper end surface of a cylinder arranged on the fixed seat is provided with a plurality of hook claws which can hook a convex ring arranged below the body; when the syringe finishes injection, at least one puncture body arranged on the inner side wall of the upper end of the injection syringe can be used for puncturing the airtight piston to lose the airtight effect so as to avoid secondary reuse.

Description

Airtight safety syringe with double elastic structure

technical field

The present invention relates to an airtight safety injection syringe with a double-elastic structure, in particular to a safety injection syringe which can be completely airtight during injection and can pierce through the airtight piston after injection to prevent used twice.

Background technique

In recent years, many medical staff have been stuck with needles, resulting in an endless stream of fatal cases of hepatitis, AIDS, etc. Needle sticks and injuries from sharp objects are the most common occupational injuries for medical staff. According to the survey, 98% of the nurses will feel the potential risk, followed by physicians at 70%. The wound caused by the needle stick is not large, but it is fatal, because the used injection syringe contains the blood or body fluid of the patient, which is a contaminated device. If you get stabbed by it, you may be infected.

Acupuncture incidents most commonly occur in general wards, and others include operating rooms, intensive care units, treatment rooms, and emergency rooms. From the perspective of medical behavior, the action of putting back the needle sheath is the most likely to be injured by the injection syringe, and the used injection syringe has not been put into the collection box, which is also easy to injure the medical staff. Therefore, the injection needles developed and used today Most of them pay attention to the procedure of avoiding the cover back, so as to avoid the accident of needle tip injury and infection of medical staff during work. The airtightness of safety injection syringes commonly used today is not good, because the airtightness of safety injection syringes is easily affected by temperature differences during transportation and use. That is to say, general safety injection syringes are susceptible to thermal expansion and contraction due to the influence of temperature, which makes the compression ratio of the material of the syringes different, and reduces the airtight effect of the safety injection syringes.

Today's injection syringes are all disposable, that is, they are discarded immediately after use. However, if the used injection syringes are not carefully disposed of, criminals will reuse the used injection syringes in order to obtain improper profits. When used, the consequences will be unimaginable.

Therefore, the present invention proposes an airtight safety injection syringe with a double-elastic structure in view of the above problems, which can not only improve the poor airtightness of commonly used safety injection syringes, but also can be used in safety injection syringes for injection After use, the airtight piston is punctured to form holes in the piston to avoid disease infection caused by unscrupulous operators after repeated use, so that the above-mentioned problems can be solved.

Utility model content

The main purpose of the present invention is to provide an airtight safety injection syringe with a double elastic structure, which is composed of the body of the needle holder and the airtight shrapnel of the hollow sleeve, so that the safety injection syringe can be used for injection. Affected by temperature, it achieves the purpose of complete airtightness.

The secondary purpose of the present invention is to provide an airtight safety injection syringe with double elastic structure, which can pierce the airtight piston to form a hole after injection, so as to avoid the purpose of being reused again.

Another object of the present invention is to provide an airtight safety injection syringe with a double elastic structure, which can be rotated and snapped off after the injection to avoid repeated use.

In order to achieve the above purpose, the safety injection syringe with double elastic structure and airtight of the present invention mainly includes an injection syringe, a needle seat and a push rod, and a hollow sleeve is arranged on the top of the injection syringe, and the hollow sleeve There are an upper ring groove and a lower ring groove on the inner side respectively, and the upper ring groove and the lower ring groove are not connected to form a positioning shrapnel and an air-tight shrapnel respectively at the upper and lower positions inside the hollow sleeve. The upper inner wall of the injection syringe is in the hollow There is at least one puncture body next to the casing; the needle seat is installed in the hollow casing, because the outer diameter of the lower end of a body of the needle seat is larger than the outer diameter of the upper end, so that the body can closely contact and cooperate with the airtight shrapnel to achieve complete airtightness , a needle seat is provided above the body, and a plurality of positioning vanes are provided on the outer wall of the needle seat, and a positioning groove provided on the positioning vane is embedded in the positioning shrapnel to position the needle seat in the hollow sleeve.

A fixing seat is provided above the push rod which is inserted into the injection syringe. The fixing seat is provided with a cylinder. A protruding ring, an airtight piston is set on the fixed seat, and the airtight piston is provided with a perforation for the cylinder to pass through. In addition, there is a gap on the top of the push rod so that the push rod can only pass through the upper two opposite The end is connected with the fixed seat, so that when the injection syringe is used up, the rotatable push rod is broken to avoid being reused for the second time.

Wherein the inner wall of the upper end of the injection syringe is further provided with at least one puncture body beside the hollow sleeve.

Wherein the inner side of the hollow sleeve is respectively provided with an upper ring groove and a lower ring groove, the upper ring groove and the lower ring groove are not connected to form the positioning elastic piece and the airtight elastic piece.

Wherein the positioning pinna is also provided with a pulling groove above the positioning groove.

Wherein the outer surface of the fixing seat is also provided with a plurality of fixing ring grooves to cooperate and fix with the plurality of fixing protruding rings provided on the inner surface of the airtight piston.

Wherein the upper surface of the cylinder has a slope, the plurality of claws are arranged on the upper surface of the cylinder in an opposite manner, and the claws on one side are higher than the claws on the other side.

Wherein the outer wall of the fixing seat is also provided with an axial groove.

Wherein the top of the push rod is also provided with a gap, so that the push rod is only connected with the fixing base by two opposite ends on the top.

Wherein the bottom of the push rod is also provided with an abutment ring.

Wherein the abutting ring is elliptical.

Description of drawings

For further illustrating technical content of the present invention, below in conjunction with embodiment and accompanying drawing the present invention is described in detail as follows, wherein:

Fig. 1 is an exploded schematic diagram of a preferred embodiment of the present invention;

Figure 2 is a schematic cross-sectional view of a preferred embodiment of the present invention; and

3 to 10 are schematic cross-sectional structural views of a preferred embodiment of the present invention in operation.

Detailed ways

Please refer to Fig. 1 and Fig. 2, it is an exploded schematic view and a schematic sectional view of a preferred embodiment of the present invention; There is a hollow sleeve 12, and the inner side wall of the hollow sleeve 12 is respectively provided with an upper ring groove 14 and a lower ring groove 16, and the upper ring groove 14 and the lower ring groove 16 are not connected, so that the inner side of the hollow sleeve 12 A positioning shrapnel 18 and an airtight shrapnel 20 are respectively formed on the top and bottom of the wall. The inner wall of the upper end of the injection syringe 10 is provided with at least one puncture body 22 next to the hollow sleeve 12; the hollow sleeve 12 is provided with a needle seat. 30. The needle holder 30 includes a body 32, the outer diameter of the lower end of the body 32 is slightly larger than the outer diameter of the upper end, so that the body 32 can be in close contact with the airtight shrapnel 20 to form a good airtightness, because the airtight shrapnel 20 It is elastic, so the airtightness of the injection syringe 10 will not be affected by temperature changes during use. The lower end of the body 32 is provided with a protruding ring 34, and the top of the body 32 is provided with a needle holder 40, the needle holder 40 is pierced with an injection needle 42, and the outer wall of the needle holder 40 is provided with a plurality of positioning pinnae 44, each positioning pinna 44 is provided with a positioning groove 46, when the needle base 30 is worn on the hollow sleeve When the tube 12, the positioning groove 46 is embedded on the positioning shrapnel 18, and the needle hub 30 is fixed on the hollow sleeve 12, and each positioning pinna 44 on the needle hub 40 is provided with a positioning pinna 44 above the positioning groove 46. Pull out groove 48.

A push rod 50 is inserted into the injection syringe 10, the bottom of the push rod 50 is provided with an elliptical abutment ring 51, the top of the push rod 50 is provided with a fixing seat 52, and the top of the push rod 50 is provided with a Notch 53, so that the push rod 50 is only connected with the fixed seat 52 by the two opposite ends above, the outer wall of the fixed seat 52 is provided with an axial groove 54, and the fixed seat 52 is sleeved with an airtight The piston 70 and the fixed seat 52 are matched by the plurality of fixed ring grooves 56 provided on the outer surface and the plurality of fixed convex rings 72 provided on the inner surface of the airtight piston 70, so that the airtight piston 70 is sleeved on the fixed seat 52 , the airtight piston 70 is provided with a perforation 74 for a cylinder 60 provided by the fixing seat 52 to pass through, the upper surface of the cylinder 60 has a slope, and the upper surface is provided on opposite sides. The claws 62 and 64 are arranged in an opposite manner, and the height of the claw 62 on one side is higher than that of the claw 64 on the other side.

Please refer to Fig. 3 to Fig. 9 together, it is a schematic diagram of the sectional structure of a preferred embodiment of the present invention during operation; , and pull down the push rod 50 to draw the medicament 80 in the medicament bottle into the syringe 10, in order to prevent the injection needle 42 from piercing the cover of the medicament bottle, the needle point of the injection needle 42 remains to pierce the cover. slag, and the residual slag is injected into the human body when the human body is injected, so when the medicine 80 is extracted, the needle holder 30 must be removed and a new needle holder 30 must be replaced. 82. Press and hold the extracting groove 48 on the positioning pinna 44 and pull it up to take off the needle hub 30, and then insert a new needle hub 30 in the hollow sleeve 12. When inserting, the needle hub 30 on the positioning pinna 44 must be The positioning groove 46 is embedded in the positioning elastic piece 18 , so that the newly replaced needle hub 30 can be fixed to the hollow sleeve 12 .

After replacing the new needle holder 30, as shown in Figure 4, the push rod 50 must be pushed up to discharge the air in the injection syringe 10, because the outer diameter of the lower end of the body 32 is slightly larger than the outer diameter of the upper end, so that the body 32 It can be in close contact with the airtight shrapnel 20 to form a good airtightness, so that the air in the injection syringe 10 can be discharged through the injection needle 42, and the medicine 80 will not leak out, and then as shown in Figure 5 The human body can be injected, which is to push the push rod 50 upwards, so that the medicine 80 is injected into the human body through the injection needle 42 .

As shown in Figure 6, when injecting, the push rod 50 must be pushed up until the puncture body 22 pierces the airtight piston 70 and makes the claws 72, 74 hook the protruding ring 34, when the airtight piston 70 is pierced by the puncture body 22 is pierced to form hole 76 (referring to Fig. 7), because be to be provided with axial groove 54 (referring to Fig. 1) on the outer wall of fixed seat 52, so when airtight piston 70 has hole 76, injection needle The barrel 10 will leak and cannot be used, so the design can prevent the airtight piston 70 from being reused twice; The push rod 50 is pulled down to make the positioning groove 46 disengage from the positioning elastic piece 18, and the needle hub 30 is pulled into the injection syringe 10 together, and because the upper end surface of the cylinder 60 has a slope and the claws 72 and 74 If there is a height difference, the needle holder 30 will be dumped on one side of the injection syringe 10, so that the injection needle 42 can be prevented from being exposed and hurting the medical staff; even as shown in Figure 9, the injection needle 42 can be dumped on the injection syringe 10. When one side of the syringe 10 is inserted, the push rod 50 is pushed up to bend the injection needle 42, so as to ensure the safety of the medical personnel.

As shown in FIG. 10 , the notch 53 provided above the push rod 50 of the present invention enables the push rod 50 to be connected to the fixing seat 52 only by two upper opposite ends. Finally, after the above operations are completed, only the push rod 50 needs to be rotated, and the push rod 50 can be unscrewed by the power of rotation, so that the push rod 50 is separated from the fixing seat 52, so that it can be prevented from being reused twice.

To sum up, the airtight safety injection syringe with double elastic structure of the present invention uses the positioning spring 18 to cooperate with the positioning groove 46 on the positioning vane 44 to fix the needle hub 30 to the hollow sleeve 12, and utilize The airtight shrapnel 20 cooperates with the body 32 to make the injection syringe 10 have good airtightness. Because the airtight shrapnel 70 is elastic, the airtightness of the injection syringe 10 will not be affected by temperature changes during use of the present invention. In addition, when the injection is completed, the puncture body 22 can be used to puncture the airtight piston 70 to form a hole 76, so that the airtight effect will be lost, so as to avoid being reused twice; Break the push rod 50 and separate it from the fixing seat 52, so as to prevent it from being reused twice.

However, what is described above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equal change and Modifications should be included in the scope of claims of the present invention.

Claims (10)

1. An airtight safety injection syringe with double elastic structure, characterized in that it includes: An injection syringe, the top of which is provided with a hollow sleeve, and the inner side of the hollow sleeve is respectively provided with a positioning shrapnel and an airtight shrapnel; A needle seat, which is installed in the hollow sleeve, the outer diameter of the lower end of the body of the needle seat is larger than the outer diameter of the upper end so as to be in contact with the airtight shrapnel, and the lower end of the body is provided with a protruding ring, the body There is a needle holder on the top, an injection needle is arranged on the needle holder, a plurality of positioning pinnaes are arranged on the outer wall of the needle holder, and a positioning groove is provided on the positioning pinna to be embedded in the positioning elastic piece; and A push rod, which is inserted into the injection syringe, a fixed seat is provided above the push rod, and an airtight piston is provided on the fixed seat cover, and a perforation is provided on the airtight piston for a cylinder of the fixed seat to pass through. Suppose, the upper surface of the cylinder is provided with a plurality of claws that can hook the protruding ring. 2 . The airtight safety injection syringe with double elastic structure as claimed in claim 1 , wherein at least one puncture body is provided on the inner side wall of the upper end of the injection syringe next to the hollow sleeve. 3 . 3. The airtight safety injection syringe with double elastic structure as claimed in claim 1, wherein an upper ring groove and a lower ring groove are respectively arranged on the inner side of the hollow sleeve, and the upper ring groove and the lower ring groove are respectively arranged. The lower ring groove is not connected to form the positioning elastic piece and the airtight elastic piece. 4 . The airtight safety injection syringe with a double elastic structure as claimed in claim 1 , wherein the positioning vane is further provided with a pulling groove above the positioning groove. 5. The airtight safety injection syringe with double elastic structure as claimed in claim 1, wherein the outer surface of the fixing base is also provided with a plurality of fixing ring grooves to be compatible with the inner surface of the airtight piston. The plurality of fixed protruding rings are matched and fixed. 6. The airtight safety injection syringe with double elastic structure as claimed in claim 1, wherein the upper surface of the cylinder has a slope, and the plurality of claws are arranged on the cylinder in an opposite manner The upper end surface, and the hook height on one side is higher than that on the other side. 7 . The airtight safety injection syringe with a double elastic structure as claimed in claim 1 , wherein an axial groove is formed on the outer wall of the fixing seat. 8 . 8. The airtight safety injection syringe with double elastic structure as claimed in claim 1, wherein a notch is provided on the top of the push rod so that the push rod can only be opened by the upper two opposite ends. And be connected with this fixing base. 9 . The airtight safety injection syringe with a double elastic structure as claimed in claim 1 , wherein an abutment ring is provided at the bottom of the push rod. 10 . 10 . The airtight safety injection syringe with a double elastic structure as claimed in claim 9 , wherein the abutment ring is elliptical. 11 .

Images