CN204072977U

CN204072977U - Accurate self-locking injection syringe

Info

Publication number: CN204072977U
Application number: CN201420557618.3U
Authority: CN
Inventors: 陈永浦; 王敏; 胡志峰
Original assignee: ZHEJIANG OUJIAN MEDICAL APPARATUS CO Ltd
Current assignee: ZHEJIANG OUJIAN MEDICAL APPARATUS CO Ltd
Priority date: 2014-09-23
Filing date: 2014-09-23
Publication date: 2015-01-07
Anticipated expiration: 2024-09-23

Abstract

The utility model discloses a kind of accurately self-locking injection syringe, comprise syringe and piston rod, described piston rod is connected with piston, the inwall of described syringe is provided with fixture block, described fixture block is fixed on the inwall of described syringe by torsion spring, described fixture block can rotate around torsion spring, the inwall of described syringe offers storage tank, described storage tank can deposit fixture block, described piston rod circumferencial direction is provided with piston sheet, described piston sheet offers some adjacent draw-in grooves vertically, described piston sheet is comb-shape, described draw-in groove thickness is identical with described fixture block thickness, described fixture block can be connected in draw-in groove, during drawing liquid, grasp push rod slowly to extract outward, when getting required liquid or when finger experiences stiff, only need clockwise or be rotated counterclockwise and make fixture block embed draw-in groove, push rod can be fixed, during tapping, rotation makes clamp depart from draw-in groove, then tapping is to required scale, rotating makes push rod fix again, the loss causing liquid in syringe due to maloperation can be prevented.

Description

Accurate self-locking injection syringe

Technical field

This utility model relates to a kind of medical apparatus and instruments, particularly the accurate self-locking injection syringe of one.

Background technology

The everyway of syringe in life is applied to some extent, because it is convenient, quick and higher degree of accuracy is widely used, but the volume of got liquid is generally confirmed when liquid got by common infusions device on the one hand according to eyes range estimation, namely when push rod plug bottom surface and scale tangent time, therefore accuracy is not high, on the other hand normally one-handed performance at extraction medicine, very large negative pressure piston rod while being sucked by medicine can be there is when extracting and also can there is sucked back trend, most cases when extraction one bottle of medicine in the middle of the process of taking out can stop disconnected several under, be inconvenient to operate and the process that pulls at operator of getting off for a long time can make finger stiffness more serious time there will be the situation that finger knots and occur, the time of injection is hindered not say and damage the finger of oneself.

The spiral self-locking injector described in Chinese patent of such as application number 200920092509.8, utilize pin to be connected on piston rod outer wall and realize locking, though this technical scheme can realize taking out the process of stopping deposit in use pin time additional, easily lose and the problem of inconvenient operation.

Utility model content

For the deficiency that prior art exists, the purpose of this utility model is to provide a kind of accurately self-locking injection syringe, and carry auto-lock function, self-locking is easy to operate prevents maloperation, and while extraction medicine, accurately can extract medication amount.

For achieving the above object, this utility model provides following technical scheme:

A kind of accurately self-locking injection syringe, comprise syringe and piston rod, described piston rod is connected with piston, the inwall of described syringe is provided with fixture block, described fixture block is fixed on the inwall of described syringe by torsion spring, described fixture block can rotate around torsion spring, the inwall of described syringe offers storage tank, described storage tank can deposit fixture block, described piston rod circumferencial direction is provided with piston sheet, and described piston sheet offers some adjacent draw-in grooves vertically, and described piston sheet is comb-shape, described draw-in groove thickness is identical with described fixture block thickness, and described fixture block can be connected in draw-in groove.

By adopting technique scheme, during drawing liquid, grasp push rod slowly to extract outward, when getting required liquid or finger when experiencing stiff, only needing clockwise or being rotated counterclockwise and make fixture block embed draw-in groove, push rod can be fixed, during tapping, rotate and make clamp depart from draw-in groove, then tapping is to required scale, rotating makes push rod fix again, and can prevent the loss causing liquid in syringe due to maloperation.

As improvement of the present utility model, the outer wall of described syringe is carved with scale, and the initial place of described scale is aligned in described draw-in groove.

By adopting technique scheme, utilize the corresponding scale of draw-in groove, when shifting the dose needing to extract soon onto, while pushing away, continuous rotating piston bar completes taken amount until fixture block is connected to draw-in groove, compares original only by seeing that scale carrys out Charge control and improves degree of accuracy.

As concrete technical scheme of the present utility model, state piston sheet and be evenly provided with four around piston rod circumferencial direction.

By adopting technique scheme, being arranged to four and only piston rod rotation 90 ° can need being blocked, decreasing amount of spin.

Compared with prior art, the utility model has the advantage of: self-locking structure is simple, easy to operate without the need to additional aid, and improve drawing liquid precision while self-locking, practical.

Accompanying drawing explanation

Fig. 1 is the structural representation of the accurate self-locking injection syringe embodiment of this practicality;

Fig. 2 is the A portion enlarged drawing of Fig. 1;

Fig. 3 is the assembling schematic diagram of the accurate self-locking injection syringe embodiment of this practicality;

Fig. 4 is the syringe cylinder structure schematic diagram of the accurate self-locking injection syringe embodiment of this practicality;

Fig. 5 is the piston rod construction schematic diagram of the accurate self-locking injection syringe embodiment of this practicality.

Description of reference numerals: 1, syringe; 11, storage tank; 2, piston rod; 3, piston; 4, piston sheet; 5, draw-in groove; 51, long strip block; 6, fixture block; 7, scale; 8, torsion spring.

Detailed description of the invention

With reference to accompanying drawing, the accurate self-locking injection syringe embodiment of this practicality is described in further detail.

See Fig. 1 and Fig. 3, described accurate self-locking injection syringe comprises syringe 1 and piston rod 2, described piston rod 2 is provided with four piston sheets 4, described piston sheet 4 axially offers the draw-in groove 5 being evenly distributed adjacent, long strip block 51 is formed between adjacent draw-in groove 5, described draw-in groove 5 is identical with long strip block 51 thickness, and described piston rod 2 is fixed with piston 3, and described piston rod 2 is connected with syringe 1 slippage.

See Fig. 2, Fig. 4 and Fig. 5, the inwall of described syringe 1 is provided with fixture block 6, described fixture block 6 is fixed on by torsion spring 8 on the inwall of syringe 1, the inwall of described syringe 1 offers storage tank 11, storage tank 11 can accommodating fixture block 6, and described fixture block 6 around torsion spring 8 to storage tank 11 single direction rotation, can be in restraining position when fixture block 6 is vertical with the inwall of syringe 1 stuck, fixture block 6 can be connected in the draw-in groove 5 on piston sheet 4, and the thickness of fixture block 6 is identical with the thickness of draw-in groove 5.

See Fig. 1 to Fig. 5, during work, piston rod 2 is pushed in syringe 1, piston 3 promotes fixture block 6, fixture block 6 rotates and makes fixture block 6 be placed in storage tank 11 under the effect of torsion spring 8, when pushing piston rod 2 due to the existence of fixture block 6 therefore when pushing from the adjacent space of piston sheet 4 through fixture block 6 until shift piston 3 onto and be close to the bottom of syringe 1, the outer wall of syringe 1 is provided with scale 7, the starting point of scale 7 draw-in groove 5 nearest with the distance piston 3 on piston sheet 4 aligns, the thickness of draw-in groove 5 also needs to change according to the corresponding fixture block 6 of accuracy requirement setpoint distance, the such as thickness of draw-in groove 5 is arranged to identical with the length of the 2ml of scale 7, when pull piston rod 2 inhales medicine, draw 4ml medicinal liquid when the bottom surface of piston 3 soon arrives the scale 7 of 4ml while drawing continuous rotating piston bar 2 illustrate that when draw-in groove 5 and fixture block 6 can block 4ml medicinal liquid extracts and completely locked piston rod 2 simultaneously, when injecting, piston rod 2 being rotated 90 ° makes draw-in groove 5 throw off fixture block 6 just injectable, during same injection also can control accuracy principle identical with when taking out medicinal liquid, although the error of also existing but compare by seeing that scale 7 is compared precision and must be improved, realize self-locking simultaneously, also prevent under finger stiffness when taking out large medicine amount liquid can pin piston rod 2 rest and taking out.

The above is only preferred implementation of the present utility model, protection domain of the present utility model be not only confined to above-described embodiment, and all technical schemes belonged under this utility model thinking all belong to protection domain of the present utility model.It should be pointed out that for those skilled in the art, do not departing from the some improvements and modifications under this utility model principle prerequisite, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims

1. an accurate self-locking injection syringe, comprise syringe and piston rod, described piston rod is connected with piston, it is characterized in that: the inwall of described syringe is provided with fixture block, described fixture block is fixed on the inwall of described syringe by torsion spring, described fixture block can rotate around torsion spring, the inwall of described syringe offers storage tank, described storage tank can deposit fixture block, described piston rod circumferencial direction is provided with piston sheet, described piston sheet offers some adjacent draw-in grooves vertically, described piston sheet is comb-shape, described draw-in groove thickness is identical with described fixture block thickness, described fixture block can be connected in draw-in groove.

2. accurate self-locking injection syringe according to claim 1, is characterized in that: the outer wall of described syringe is carved with scale, the initial place of described scale is aligned in described draw-in groove.

3. accurate self-locking injection syringe according to claim 2, is characterized in that: described piston sheet is evenly provided with four around piston rod circumferencial direction.