CN212575404U

CN212575404U - Disposable pulse type catheter injector

Info

Publication number: CN212575404U
Application number: CN202020401177.3U
Authority: CN
Inventors: 陈金萍; 游越西; 罗艳霞
Original assignee: First Affiliated Hospital of Guangxi Medical University
Current assignee: First Affiliated Hospital of Guangxi Medical University
Priority date: 2020-03-26
Filing date: 2020-03-26
Publication date: 2021-02-23
Anticipated expiration: 2030-03-26

Abstract

The utility model discloses a disposable pulsed pipe syringe, including the cylinder that has accommodation space and at least part accept in piston rod in the accommodation space, still including set up in the multilayer annular rubber of the inner wall of cylinder blocks, the multilayer the rubber blocks and follows the direction of propulsion of piston rod sets up at intervals in proper order, the piston rod is including the plug, pintle and the ejector pad that connect gradually, the pintle include with the outer wall that the inner wall of cylinder is relative reaches certainly the recess that the outer wall inwards caves in and forms, the quantity and the shape of recess with the rubber blocks and matches. Compared with the prior art, the utility model provides a disposable pulse type catheter injector, simple structure is reasonable, pulse volume and injection speed are stable controllable and the operation is simple and direct.

Description

Disposable pulse type catheter injector

Technical Field

The utility model belongs to the field of medical equipment, especially, relate to a disposable pulsed pipe injector.

Background

As a common medical appliance, the principle of the syringe is proposed by Carteinell Italy as a common medical appliance for a long time, the first human body test is carried out by Boyle and Rene of England in 1657 years, and the material of the syringe is changed from metal and glass into plastic, namely the current disposable syringe, and the disposable syringe is simple to manufacture and is thrown away once, so that the risk of infection during injection is greatly reduced.

Referring to fig. 1, in the prior art, nurses often use the syringe with the conventional structure to perform pulse type catheter flushing, and have the defects that the speed cannot be controlled and the flushing liquid amount cannot be controlled. Thus, the volume of a single pulse and the overall injection rate can be learned through repeated practice and years of clinical experience, causing inconvenience to the health care provider.

Therefore, there is a need to provide a new disposable pulse catheter injector with simple and reasonable structure, stable and controllable pulse quantity and injection speed, and simple operation to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provide a disposable pulse type catheter injector which has simple and reasonable structure, stable and controllable pulse quantity and injection speed and simple and convenient operation.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a disposable pulsed pipe syringe, including the cylinder that has accommodation space and at least part accept in piston rod in the accommodation space still including set up in the multilayer annular rubber of the inner wall of cylinder hinders piece, the multilayer rubber hinders the piece and follows the direction of propulsion of piston rod sets gradually at intervals, the piston rod is including the plug, pintle and the ejector pad that connect gradually, the pintle include with the outer wall that the inner wall of cylinder is relative reaches certainly the recess that the outer wall inwards caves in and forms, the quantity and the shape of recess with rubber hinders the piece and matches.

Preferably, the cross-sectional area of the outer wall of the rubber plug is equal to that of the inner wall of the needle cylinder, and the cross-sectional area of the outer wall of the pintle is smaller than that of the inner wall of the needle cylinder.

Preferably, the rubber stopper comprises a first surface close to the needle port end, a second surface opposite to the first surface, and a third surface connecting the first surface and the second surface, and the joint of the first surface and the third surface and the joint of the second surface and the third surface are both rounded.

Preferably, the radius of the chamfer between the first surface and the third surface is 0.2cm, and the radius of the chamfer between the second surface and the third surface is 0.1 cm.

Preferably, the push block comprises a fourth surface far away from the pintle, and the fourth surface is a curved surface with a central part bent towards the direction close to the pintle.

Preferably, the material of the needle cylinder is plastics, and the rubber barrier piece and the needle cylinder are integrally formed by injection molding.

To sum up, compare with prior art, the utility model discloses following beneficial effect has: the inner wall of the needle cylinder is provided with the plurality of layers of rubber blocking parts, and the outer wall of the pintle is provided with the groove, so that when the syringe is used, the piston rod spontaneously generates a pulse effect under the blocking effect of the plurality of layers of rubber blocking parts, the transfusion amount of single pulse is constant, and the whole transfusion speed is controllable; the connecting part of the first surface and the third surface and the connecting part of the second surface and the third surface are respectively provided with the fillets, and the radiuses of the two fillets are respectively limited to be 0.2cm and 0.1cm, so that a nurse can use the disposable pulse type catheter injector to extract flushing liquid more easily, the resistance is larger during injection, the hand feeling of the nurse during pulse injection is guaranteed, the obstruction during liquid extraction is improved, and the structure is reasonable and practical; through setting up the fourth surface is central part for being close to the crooked curved surface of pintle direction for the fourth surface is laminated with people's thumb shape, makes difficult slipping take off the hand during the injection, has promoted the stability and the reliability of injection.

Drawings

FIG. 1 is a schematic plan view of a prior art disposable catheter syringe;

fig. 2 is a schematic plan view of the disposable pulse catheter injector provided by the present invention;

fig. 3 is a schematic plan view of another embodiment of the disposable pulse catheter injector of the present invention;

fig. 4 is an enlarged view of a portion a of the disposable catheter syringe shown in fig. 3.

In the figure, 100, disposable pulse catheter injector; 10. a needle cylinder; 11. a body portion; 12. a needle cylinder; 13. an opening; 20. a piston rod; 21. a rubber plug; 22. a pintle; 221. a groove; 23. a push block; 231. A fourth surface; 30. a rubber stopper; 31. a first surface; 32. a second surface; 33. a third surface; 101. an accommodation space.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples. The following experimental examples and examples are intended to further illustrate but not limit the invention.

Referring to fig. 2-4, the present invention provides a disposable pulse catheter injector 100. The disposable pulse type catheter injector 100 comprises a syringe 10 with a containing space 101, a piston rod 20 at least partially contained in the containing space 101, and a multi-layer annular rubber barrier 30 arranged on the inner wall of the syringe 10. Wherein, the plurality of layers of rubber stoppers 30 are sequentially arranged at intervals along the advancing direction of the piston rod 20.

The syringe 10 includes a cylindrical body 11, a needle cylinder 12 provided at one end of the body 11, and an opening 13 provided at an end of the body 11 remote from the needle cylinder 12. The opening 13 is communicated with the receiving space 101 and the piston rod 20 is inserted into the cylinder 10 through the opening 13.

The piston rod 20 comprises a rubber plug 21, a pintle 22 and a push block 23 which are connected in sequence. Specifically, in the present embodiment, the rubber plug 21 and the pintle 22 and the push block 23 are connected by connecting rods.

The cross-sectional area of the outer wall of the rubber stopper 21 is equal to the cross-sectional area of the inner wall of the body portion 11. So set up, when the plug 21 in the accommodation space 101 removes, guaranteed the plug 21 thickness direction's both sides can not produce the flow of liquid or gaseous.

The cross-sectional area of the outer wall of the pintle 22 is smaller than the cross-sectional area of the inner wall of the barrel body 11 to ensure that the pintle can move within the receiving space 101. Specifically, the pintle 22 includes a groove 221 formed by being depressed inward from an outer wall thereof opposite to the inner wall of the body portion 11. Wherein, the number and shape of the grooves 221 are matched with those of the rubber stopper 30.

The push block 23 comprises a fourth surface 231 remote from the pintle 22. The fourth surface 231 is a curved surface having a central portion curved toward the pintle 22. So set up for fourth surface 231 and the laminating of people's thumb shape, difficult slipping takes off the hand when making the injection, has promoted the stability and the reliability of injection.

Preferably, the fourth surface 231 is a frosted surface to further increase friction.

The rubber stopper 30 includes a first surface 31 near the needle-mouth end, a second surface 32 opposite to the first surface 31, and a third surface 33 connecting the first surface 31 and the second surface 32. Wherein, the junction of the first surface 31 and the third surface 33 and the junction of the second surface 32 and the third surface 33 are rounded.

Preferably, in the present embodiment, a radius of the chamfer between the first surface 31 and the third surface 33 is 0.2cm, and a radius of the chamfer between the second surface 32 and the third surface 33 is 0.1 cm. So set up for the nurse is using disposable pulsed pipe syringe 100 extracts during the flush fluid more light, and the resistance is bigger when the injection, when having guaranteed promptly that nurse carries out the feel when pulse injection, has promoted the hindrance when drawing liquid. Of course, this is not a limitation to the scope of the present invention, and in the syringes with other specifications, the radius of the chamfer between the first surface 31 and the third surface 33 and the radius of the chamfer between the second surface 32 and the third surface 33 can be set to other values on the premise of ensuring that the radius of the chamfer between the first surface 31 and the third surface 33 is greater than the radius of the chamfer between the second surface 32 and the third surface 33.

Preferably, the material of the needle cylinder 10 is plastic, and the rubber stopper 30 is integrally injection-molded with the needle cylinder 10.

Compared with the prior art, the utility model discloses following beneficial effect has: the inner wall of the needle cylinder is provided with the plurality of layers of rubber blocking parts, and the outer wall of the pintle is provided with the groove, so that when the syringe is used, the piston rod spontaneously generates a pulse effect under the blocking effect of the plurality of layers of rubber blocking parts, the transfusion amount of single pulse is constant, and the whole transfusion speed is controllable; the connecting part of the first surface and the third surface and the connecting part of the second surface and the third surface are respectively provided with the fillets, and the radiuses of the two fillets are respectively limited to be 0.2cm and 0.1cm, so that a nurse can use the disposable pulse type catheter injector to extract flushing liquid more easily, the resistance is larger during injection, the hand feeling of the nurse during pulse injection is guaranteed, the obstruction during liquid extraction is improved, and the structure is reasonable and practical; through setting up the fourth surface is central part for being close to the crooked curved surface of pintle direction for the fourth surface is laminated with people's thumb shape, makes difficult slipping take off the hand during the injection, has promoted the stability and the reliability of injection.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should be construed as the scope of the present invention.

Claims

1. The utility model provides a disposable pulsed pipe syringe, including the cylinder that has accommodation space and at least part accept in piston rod in the accommodation space, its characterized in that still including set up in the multilayer annular rubber of the inner wall of cylinder hinders piece, the multilayer the rubber hinders the piece and follows the direction of propulsion of piston rod sets up at intervals in proper order, the piston rod is including the plug, pintle and the ejector pad that connect gradually, the pintle include from its with the recess of the inside sunken formation of the outer wall that the inner wall is relative of cylinder, the quantity and the shape of recess with the rubber hinders the piece and matches.

2. The disposable pulsed catheter syringe of claim 1, wherein the cross-sectional area of the outer wall of the stopper is equal to the cross-sectional area of the inner wall of the barrel, and the cross-sectional area of the outer wall of the pintle is less than the cross-sectional area of the inner wall of the barrel.

3. The disposable pulsed catheter syringe of claim 1, wherein the rubber barrier comprises a first surface proximate to a needle port end, a second surface opposite the first surface, and a third surface connecting the first surface and the second surface, the junction of the first surface and the third surface and the junction of the second surface and the third surface being rounded.

4. The disposable pulsed catheter syringe of claim 3, wherein a radius of the chamfer between the first surface and the third surface is 0.2cm and a radius of the chamfer between the second surface and the third surface is 0.1 cm.

5. The disposable pulsed catheter syringe of claim 1, wherein the push block includes a fourth surface distal to the pintle, the fourth surface being curved with a central portion curving in a direction proximal to the pintle.

6. The disposable pulsed catheter syringe of claim 1, wherein the barrel is of plastic material and the rubber barrier is injection molded integrally with the barrel.