CN212755817U

CN212755817U - Novel low-resistance syringe

Info

Publication number: CN212755817U
Application number: CN202020415448.0U
Authority: CN
Inventors: 王增辉; 王鑫春; 钟颖; 魏星杰; 夏天
Original assignee: Henan Tuoren Medical Device Co ltd
Current assignee: Henan Tuoren Medical Device Co ltd
Priority date: 2020-03-27
Filing date: 2020-03-27
Publication date: 2021-03-23
Anticipated expiration: 2030-03-27

Abstract

The utility model relates to the technical field of medical equipment, a novel low resistance syringe is disclosed, including cylinder and gliding push rod and piston in the cylinder, the piston includes piston body and plug, the piston body includes the support component and sets up the stopper cap on the support component top, the plug cover is established on the support component, the inside cavity that is used for placing the first head of push rod of offering of support component, the first top of push rod installation with leave the clearance of removal between the cavity top, be equipped with the circular bead on the stopper cap, the circular bead with leave the clearance between the plug, the push rod is located the position of plug below still is provided with the push pedal. The utility model discloses simple structure, low cost, convenient operation, sealing performance are good, easily mass production, and the resistance when not only having effectively reduced the operation, sealing performance is good moreover.

Description

Novel low-resistance syringe

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a novel low resistance syringe.

Background

The syringe is a medical apparatus commonly used in clinic, and is generally composed of a cylinder body, a piston and a core rod. Especially in the field of anesthesia puncture, it is very important how to correctly judge that the puncture needle enters into the epidural space, but the traditional plastic injector has larger resistance when being pushed and pulled, and can reduce the hand touch of operators, thereby influencing the operation judgment, and the glass injector with better sliding performance is generally used when the anesthesia is performed by puncture operation at present, but the glass injector is often broken in the production and transportation process, and the problem of inconvenient application exists. Therefore, how to reduce the frictional resistance between the inner wall of the syringe barrel and the piston sliding therein has become a great problem in the design of the present syringe construction.

There have been multiple low resistance syringes in prior art, but these syringes mostly have the structure complicacy, manufacturing cost is higher, sealing performance is poor, the operation is inconvenient, the not ideal scheduling problem of result of use, chinese patent CN200520013287.8 discloses a low resistance syringe piston, including piston body and sealing washer, because of being equipped with the round opening in the sealing washer, the size of sealing washer can be adjusted along with piston cap upper flange embedding open-ended degree of depth and the size of air pressure, thereby adjust contact surface and frictional resistance between sealing washer and the syringe body inner wall, reach low resistance, strong sealed effect. But its piston comprises piston body, piston cap, fixed core, fixing base, and not only the structure is complicated, and the operation is inconvenient, and the process is loaded down with trivial details when this product assembles moreover, is unfavorable for realizing large-scale automated production.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides a novel low-resistance injector which has simple structure, low cost, convenient operation, good sealing performance and easy mass production.

The utility model adopts the technical scheme as follows:

the utility model provides a novel low resistance syringe, includes the cylinder and gliding push rod and piston in the cylinder, the piston includes piston body and plug, the piston body includes the support component and sets up the stopper cap on support component top, the plug cover is established on the support component, the inside cavity that is used for placing the installation head of push rod that offers of support component, the installation head top of push rod with leave the removal clearance between the cavity top, be equipped with the circular bead on the stopper cap, the circular bead with leave the clearance between the plug, the push rod is located the position of plug below still is provided with the push pedal.

Furthermore, the supporting part and the plug cap are integrally formed, the supporting part is in a funnel shape, and the included angle between the conical surface of the funnel-shaped supporting part and the vertical surface is 120-150 degrees.

Further, the plug be cavity ring-type, the plug inlayer is equipped with the laminating inclined plane, the plug through laminating inclined plane with funnel shaped support component's toper inclined plane cooperation is connected.

Furthermore, a sealing line is arranged at the top of the periphery of the rubber plug and is in contact fit with the inner wall of the needle cylinder.

Furthermore, a sealing ring is embedded in the rubber plug.

Furthermore, a buckle is arranged on the push rod mounting head, a clamping groove matched with the push rod mounting head is arranged in the cavity of the supporting component, and the push rod mounting head is connected with the supporting component through the buckle and the clamping groove.

Furthermore, an anti-falling bulge is further arranged at the opening of the tail of the needle cylinder.

Compared with the prior art, the utility model discloses the beneficial effect who has is:

the utility model provides a novel low resistance syringe simple structure, low cost, convenient operation, sealing performance is good, easily mass production, during the use, the plug agrees with mutually through laminating inclined plane and the conical surface of hourglass hopper-shaped support component and is connected, the leakproofness of pull in-process has been guaranteed greatly, and the contained angle of support component conical surface and vertical face is 120 + 150, make the motion of plug more smooth and easy, and the seal line that the plug periphery set up, especially form interference fit with the cylinder inner wall, the resistance when having reduced the operation, the low resistance pull of syringe has been realized, and its piston structure is simple, and convenient operation, easily extensive popularization and use.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of the present invention in an unused state.

Fig. 2 is an exploded schematic view of the present invention.

Fig. 3 is an enlarged schematic view of the rubber plug structure of the present invention.

Fig. 4 is a structural state diagram of the present invention during negative pressure.

Fig. 5 is a structural state diagram of the present invention at positive pressure.

Fig. 6 is a structural state diagram of the push rod of the present invention when it is pulled to the end of the syringe.

1-needle cylinder, 2-push rod, 3-piston, 4-piston body, 5-rubber plug, 6-supporting component, 7-plug cap, 8-mounting head, 9-cavity, 10-shoulder, 11-movable gap, 12-push plate, 13-conical surface, 14-vertical surface, 15-attaching inclined surface, 16-sealing line, 17-sealing ring, 18-buckle, 19-clamping groove, 20-bulge and 101-inner wall of needle cylinder.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments. The embodiments shown below do not limit the scope of the invention described in the claims. Further, the entire contents of the configurations shown in the following embodiments are not limited to those necessary as a solution of the invention described in the claims.

As shown in figures 1-3, a novel low resistance injector comprises a syringe 1, a push rod 2 and a piston 3 which slide in the syringe 1, the piston 3 comprises a piston body 4 and a rubber plug 5, the piston body 4 comprises a supporting component 6 and a plug cap 7 arranged at the top end of the supporting component 6, the rubber plug 5 is sleeved on the supporting part 6, a cavity 9 for placing an installation head 8 of the push rod 2 is arranged in the supporting part 6, a moving gap is reserved between the top end of the mounting head 8 of the push rod 2 and the top of the cavity 9, a shoulder 10 is arranged on the plug cap 7, a movable gap 11 is reserved between the shoulder 10 and the rubber plug 5, the movable gap 11 is 5-8mm, thereby facilitating the free movement of the rubber plug 5 on the supporting part 6, and the push plate 12 is arranged at the position of the push rod 2 below the rubber plug 5.

Further, the supporting member 6 and the plug cap 7 are integrally formed, the supporting member 6 is funnel-shaped, and the included angle between the tapered surface 13 of the supporting member 6 and the vertical surface 14 is 120-150 °.

Further, the plug 5 is the cavity ring-type, 5 inlayers of plug are equipped with laminating inclined plane 15, plug 5 through laminating inclined plane 15 with the toper face 13 cooperation of leaking hopper-shaped supporting component 6 is connected, more is favorable to guaranteeing the leakproofness of pull in-process.

Further, a sealing line 16 is arranged at the top of the periphery of the rubber plug 5, and the sealing line 16 is in contact fit with the inner wall of the needle cylinder 1.

Preferably, the roughness Ra of the inner wall surface of the inner wall 101 of the syringe is less than 0.5 μm, so as to reduce the friction force of the contact of the plug sealing line 16.

Preferably, the interference between the outer diameter of the sealing line 16 and the inner diameter of the inner wall 101 of the syringe 1 is 10-20, so that the low resistance effect can be realized during the use of the syringe.

Further, the utility model discloses a preferred embodiment, 5 inside still embedded sealing washers 17 that have of plug to further improve its sealed effect, can effectively avoid malleation gas leakage.

Furthermore, a buckle 18 is arranged on the mounting head 8 of the push rod 2, a clamping groove 19 matched with the buckle is arranged in the cavity 9 of the supporting component 6, and the mounting head 8 of the push rod 2 is connected with the supporting component 6 through the buckle 18 and the clamping groove 19.

Furthermore, as shown in fig. 6, an anti-dropping protrusion 20 is further disposed at an opening at the tail of the syringe 1, so as to prevent the push rod 2 from reaching the tail of the syringe 1 and being separated from the syringe 1, thereby reducing the occurrence of liquid spilling.

When the embodiment is used and clinical medical care personnel extract liquid, the rubber plug 5 of the utility model is in a negative pressure state, as shown in fig. 4, the rubber plug 5 is deformed into the rubber plug 5 under the reverse friction force, the attaching inclined plane 15 is tightly matched with the conical surface 13 under the action of the friction force applied to the sealing line 16 to decompose, and the edge of the plug cap 7 supports the sealing line 16 to be greatly deformed, thereby avoiding the leakage of the rubber plug 5 and ensuring the negative pressure sealing performance of the utility model, so that the medical care personnel can extract the liquid smoothly;

when clinical medical personnel injected liquid, the utility model discloses a plug 5 was in the malleation state, as shown in fig. 5, plug 5 took place deformation outside plug 5 under reverse effort, under the effect of thrust and the 16 frictional forces that receive of seal line that push pedal 12 gave decomposed the effect, and laminating inclined plane 15 closely agrees with conical surface 13, avoids malleation gas leakage, ensures the utility model discloses a leakproofness for medical personnel injects liquid smoothly.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a novel low resistance syringe, includes cylinder (1) and gliding push rod (2) and piston (3) in cylinder (1), its characterized in that: piston (3) include piston body (4) and plug (5), piston body (4) are including supporting component (6) and set up stopper cap (7) on supporting component (6) top, plug (5) cover is established on supporting component (6), supporting component (6) inside offer cavity (9) that are used for placing push rod (2) installation head (8), push rod (2) installation head (8) top with leave the clearance of removing between cavity (9) top, be equipped with circular bead (10) on stopper cap (7), circular bead (10) with leave clearance (11) between plug (5), push rod (2) are located plug (5) below position still is provided with push pedal (12).

2. The novel low drag syringe of claim 1 wherein: the supporting part (6) and the plug cap (7) are integrally formed, the supporting part (6) is in a funnel shape, and the included angle between the conical surface (13) of the supporting part (6) and the vertical surface (14) is 120 degrees and 150 degrees.

3. The novel low drag syringe of claim 1 wherein: the movable gap (11) is 5-8 mm.

4. The novel low drag syringe of claim 2 wherein: the rubber plug (5) is hollow and annular, a laminating inclined plane (15) is arranged on the inner layer of the rubber plug (5), and the rubber plug (5) is connected with a conical surface (13) of the funnel-shaped supporting part (6) in a matching mode through the laminating inclined plane (15).

5. The novel low drag syringe of claim 4 wherein: the top of the periphery of the rubber plug (5) is provided with a sealing line (16), and the sealing line (16) is contacted and attached with the inner wall (101) of the needle cylinder.

6. The novel low drag syringe of claim 5 wherein: the surface roughness Ra of the inner wall (101) of the needle cylinder is less than 0.5 micrometer, and the interference between the outer diameter of the sealing line (16) and the inner diameter of the inner wall (101) of the needle cylinder is 10-20.

7. The novel low drag syringe of claim 6 wherein: the rubber plug (5) is also internally embedded with a sealing ring (17).

8. The novel low drag syringe of claim 7 wherein: the push rod (2) mounting head (8) is provided with a buckle (18), a cavity (9) of the supporting component (6) is internally provided with a clamping groove (19) matched with the push rod, and the push rod (2) mounting head (8) is connected with the supporting component (6) through the buckle (18) and the clamping groove (19).

9. The novel low drag syringe of claim 1 wherein: an anti-dropping bulge (20) is also arranged at the opening of the tail part of the needle cylinder (1).