CN209734661U

CN209734661U - Low-resistance syringe

Info

Publication number: CN209734661U
Application number: CN201822147122.XU
Authority: CN
Inventors: 伦若森; 李西涵
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-12-20
Filing date: 2018-12-20
Publication date: 2019-12-06
Anticipated expiration: 2028-12-20

Abstract

The utility model provides a low resistance syringe, including injection tube and gliding push rod and piston in the injection tube, its characterized in that: the push rod include spacing section and cover and establish the section, spacing section includes round platform portion, the cover is established and is equipped with the piston in the section, the piston includes the ring cock body, the outside of ring cock body is equipped with the outward flange, the inboard of ring cock body is equipped with the laminating groove, round platform portion and laminating groove cooperation. The utility model has the advantages that: the sealing degree of the piston is ensured, and meanwhile, the piston is less in contact with the cylinder, the resistance is smaller, and the use of an operator is more convenient; an inner flange is arranged in the middle of the ring plug body, so that more deformation allowance is strived for in the middle, and the resistance in operation is further reduced.

Description

Low-resistance syringe

Technical Field

The utility model relates to a medical appliance, in particular to a low-resistance injector.

Background

Syringes are a common medical device. The common injectors comprise glass injectors and plastic injectors, the treatment cost of the plastic injectors is low, most of modern medical injectors are made of plastics, the pistons of the plastic injectors are required to be tightly attached to the inner wall of a cylinder body in order to guarantee the sealing effect between the pistons and the cylinder body, the pistons are excessively contacted with the inner wall of the cylinder body, the resistance of a push rod can be increased, and the hand touch of operators can be reduced due to the large resistance of the push rod of the injector in the process of puncture operation anesthesia, so that the operation judgment is influenced.

In the prior art, various low-resistance syringes are available, the structure of a piston of the syringe is fixed, and when the pressure in a cylinder is too high, the piston is pressed and deformed, so that the contact area between the piston and the inner wall of the cylinder is increased, and the resistance is increased; some syringe pistons have complex structures and need to combine a plurality of components, so that the overall production and assembly cost is increased; some syringe piston structures are made of soft and hard combined materials, and the existing hard materials influence the resilience of the soft materials, so that the residual amount of the syringe medicament is large. In general, the existing low-resistance injector is not ideal in use effect, and needs further improvement and optimization.

SUMMERY OF THE UTILITY MODEL

The utility model provides a low resistance syringe has solved the unsatisfactory problem of current low resistance syringe result of use.

The technical scheme of the utility model is realized like this: a low resistance syringe, includes the syringe and push rod and piston that slide in the syringe, its characterized in that: the push rod include spacing section and cover and establish the section, spacing section includes round platform portion, the cover is established and is equipped with the piston in the section, the piston includes the ring cock body, the outside of ring cock body is equipped with the outward flange, the inboard of ring cock body is equipped with the laminating groove, round platform portion and laminating groove cooperation.

The limiting section comprises a conical part, and the conical part is connected with the circular table part.

The push rod further comprises a main body section and a tail disc section, the main body section is connected with the sleeving section, and the tail disc section is connected with the main body section.

The cross section of the main body section is in a cross shape.

The laminating inslot be equipped with the angle groove.

An inner flange is arranged in the annular plug body and matched with the sleeving section.

The injection tube comprises a tube body, and the tail part of the tube body is provided with an anti-skid groove.

The injection tube comprises a tube body, and a clamping flange is arranged at the opening at the tail part of the tube body.

The card flange comprises an arc-shaped section and an oblique line section.

The utility model has the advantages that: the sealing degree of the piston is ensured, and meanwhile, the piston is less in contact with the cylinder, the resistance is smaller, and the use of an operator is more convenient; an inner flange is arranged in the middle of the ring plug body, so that more deformation allowance is strived for in the middle, and the resistance in operation is further reduced.

Drawings

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

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

Fig. 2 is a schematic view of the structure of the push rod of the present invention.

Fig. 3 is a schematic view of the piston structure of the present invention.

Fig. 4 is a schematic view of the structure of the injection tube of the present invention.

Fig. 5 is a top view of fig. 4.

In the figure: 1-push rod, 2-piston, 3-injection tube, 11-limiting section, 111-conical section, 112-round table section, 12-sleeving section, 13-main body section, 14-tail disc section, 21-ring plug body, 22-outer flange, 23-fitting groove, 24-angle groove, 25-inner flange, 31-barrel body, 32-anti-slip groove, 33-clamping flange, 331-arc section and 332-oblique line section.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.

As shown in figure 1, the low-resistance injector comprises a push rod 1, a piston 2 and an injection tube 3, wherein the piston 2 is sleeved on the push rod 1, and when the push rod 1 slides up and down, the piston 2 and the injection tube 3 form a seal to realize the functions of sucking and injecting medicaments.

As shown in fig. 2, the push rod 1 includes a limiting section 11, a sleeving section 12, a main body section 13 and a tail disc section 14, the limiting section 11 further includes a conical section 111 and a circular table section 112, the conical section 111 is located at the head and connected with the circular table section 112, the circular table section 112 is inverted, an inclined end surface of the circular table section 112 is matched with the piston 2, the piston can be gradually compressed, better sealing is achieved, the piston 2 is clamped by a lower end surface of the circular table section 112, limiting of the piston 2 is achieved, the circular table section 112 is connected with the sleeving section 112, the sleeving section 112 is used for sleeving the piston 2, the sleeving section 112 is connected with the main body section 113, the cross section of the main body section 113 is cross-shaped, materials can be saved while thrust is transmitted, the main body section 113 is connected with the tail disc section 114, and the tail disc section 114 is circular plate-shaped and used for pressing or.

As shown in fig. 3, the plunger 2 includes a ring body 21, an outer flange 22, a fitting groove 23, an angular groove 24 and an inner flange 25, the outer flange 22 is located at the outer side of the upper end of the ring body 21, the outer flange 22 is used for contacting with the syringe 3 to form a seal between the plunger and the syringe 3, the fitting groove 23 is opened at the inner side of the upper end of the ring body 21, the lower end surface of the fitting groove 23 is in contact fit with the lower end surface of a circular table portion 112, the vertical end surface of the fitting groove 23 is in contact fit with the oblique end surface of the circular table portion 112, the circular table portion 112 acts on the fitting groove 23, the retraction of the outer flange 22 is limited by the circular table portion 112 to ensure the stability of the seal, the angular groove 24 is opened at the corner of the fitting groove 23 to provide more allowance for the deformation of the ring body 21, further reduce the resistance, the inner flange 25 is located at the inner side of the middle end of the ring body 21, the inner flange 25 can provide more allowance, the sealing and deformation of the annular plug body 21 is optimized to further reduce resistance.

As shown in fig. 4 and 5, the syringe 3 includes a barrel 31, an anti-slip groove 32 and a clamping flange 33, the anti-slip groove 32 is located on a wing plate at the tail of the barrel 31 to improve the holding of fingers on the barrel, the clamping flange 33 is located at an opening at the tail end of the barrel 1 to limit the push rod 1 and prevent the push rod 1 from easily sliding out of the syringe, the clamping flange 33 includes an arc-shaped section 331 and an oblique section 332, the arc-shaped section 331 can limit the push rod 1 but cannot easily pull out the push rod 1 from the syringe 3, and the oblique section 332 gradually reduces the caliber of the opening to facilitate the stable entry of the push rod 1 into the syringe 3.

The utility model discloses an injector divide into three kinds of operating condition: quiescence, aspiration and injection.

In the static state, the outer flange contacts the inner wall of the cylinder to form a seal. In the drawing liquid state, the push rod draws the medicament down, produce the negative pressure in the barrel, the outward flange upwards retracts, area of contact with the barrel inner wall reduces, reduce the resistance of push rod, simultaneously under the spacing of round platform portion blocks, avoid when too big because of the negative pressure, the outward flange retracts too much, the contact seal of outward flange and barrel inner wall is become invalid, influence the leakproofness of syringe, the push rod is pulled down and is stopped, the negative pressure in the barrel reduces gradually, the outward flange kick-backs, the contact of outward flange and barrel inner wall resumes. In the injection state, the push rod is pushed upwards, the outer flange expands due to the extrusion of the liquid medicine in the cylinder, the contact with the inner wall of the cylinder is increased, the sealing performance of the piston is improved, the pressure in the cylinder is gradually reduced until the push rod is stopped pushing upwards, the flange rebounds, and the contact between the flange and the inner wall of the cylinder is recovered.

The utility model discloses a syringe compares with current syringe, during the drop-down push rod, when guaranteeing the leakproofness of piston, can make the contact of piston and barrel still less, and the resistance is littleer, the operating personnel's of being convenient for use more. An inner flange is arranged in the middle of the ring plug body, so that more deformation allowance is strived for in the middle, and the resistance in operation is further reduced.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A low drag syringe comprising a barrel (3) and a push rod (1) and piston (2) sliding within the barrel (3), characterized in that: push rod (1) establish section (12) including spacing section (11) and cover, spacing section (11) include round platform portion (112), the cover is established and is equipped with piston (2) on section (12), piston (2) are including ring cock body (21), the outside of ring cock body (21) is equipped with outward flange (22), the inboard of ring cock body (21) is equipped with laminating groove (23), round platform portion (112) and laminating groove (23) cooperation.

2. The low drag syringe of claim 1 wherein: the limiting section (11) comprises a conical part (111), and the conical part (111) is connected with a circular truncated cone part (112).

3. A low drag syringe as claimed in claim 1 or claim 2 wherein: the push rod (1) further comprises a main body section (13) and a tail disc section (14), the main body section (13) is connected with the sleeving section (12), and the tail disc section (14) is connected with the main body section (13).

4. The low drag syringe of claim 3 wherein: the cross section of the main body section (13) is in a cross shape.

5. The low drag syringe of claim 1 wherein: an angle groove (24) is arranged in the fitting groove (23).

6. The low drag syringe of claim 1 or 5 wherein: an inner flange (25) is arranged in the ring plug body (21), and the inner flange (25) is matched with the sleeving section (12).

7. The low drag syringe of claim 1 wherein: the injection tube (3) comprises a tube body (31), and the tail part of the tube body (31) is provided with an anti-skid groove (32).

8. The low drag syringe of claim 1 wherein: the injection tube (3) comprises a tube body (31), and a clamping flange (33) is arranged at the opening at the tail part of the tube body (31).

9. The low drag syringe of claim 8 wherein: the clamping flange (33) comprises an arc-shaped section (331) and a diagonal section (332).