A wedging low-resistance pull-back self-destruct syringe
A technology for syringes and resistance to retraction, which is applied in the field of syringes, and can solve the problems of abnormal use of the needle seat and difficulty in pulling back, and achieve the effect of solving the difficulty of pulling back and reducing the resistance of pulling back
Active Publication Date: 2016-04-20
浙江龙德医药有限公司
View PDF7 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Therefore, it effectively solves the problem that the needle seat is difficult to pull back when it is effectively fixed, and the needle seat cannot be used normally when it is effectively pulled back
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0016] see figure 1 , figure 2 and image 3 , a wedge-pressure low-resistance pull-back self-destruct syringe, comprising a sheath assembly 1 and a push rod assembly 2 slidably connected in the sheath assembly 1 . The sheath assembly 2 includes a sheath 10 , a needle holder 11 and a support seat 12 arranged in the front of the inner hole of the sheath 10 , and a retaining ring 13 arranged in the rear of the inner hole of the sheath 10 . The front inner hole of the jacket 10 is a three-step stepped hole, and a front shoulder 101 is arranged at the front end of the stepped hole. The needle base 11 is sleeved in the second-step inner hole of the stepped hole through the front shoulder 101 , and the support seat 12 is sleeved in the rear expansion hole 102 behind the second-step inner hole. A needle connecting portion 111 is disposed in the middle of the front portion of the needle holder 11 , and a through hole is formed in the middle, and a front bayonet 112 is disposed at t...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses an engagement low-resistance pull-back type self-destruction injector. The injector comprises a jacket component and a push rod component connected with the jacket component in a sliding manner, wherein the jacket component comprises a jacket and a needle base; the push rod component comprises a push rod and a piston arranged on the push rod; a core rod for pulling the needle base to retract is arranged on the push rod; the needle base is connected with the interior of the jacket through a connecting structure; the connecting structure comprises a supporting base engaged with the rear end of the needle base; the supporting base is connected with the inner periphery of the jacket through a friction structure; the core rod can be selectively and uniaxially connected with and sequentially pull back the supporting base and the needle base. The needle base and the jacket are engaged and fixed through the supporting base, so that the needle base is effectively fixed during normal injection operation, and when the needle base and the jacket are pulled back through the push rod, the supporting base is pulled firstly, the problem that the needle base pulls the needle base after being axially limited is effectively solved, and the pull-back resistance of the needle base is effectively reduced, so that the problems that the needle base is difficult to pull back when being effectively fixed and the needle back can not be normally used when being effectively pulled back are effectively solved.
Description
technical field [0001] The invention relates to a syringe mainly used for subcutaneous injection, intramuscular injection or intravenous injection, especially a syringe with the functions of self-destructing for one-time use, pulling back the needle to avoid accidental stabbing of medical personnel and other personnel, and belongs to the field of medical equipment . Background technique [0002] Disposable syringes are widely used in the medical field to avoid virus cross-infection caused by using unhygienic syringes. Ordinary disposable syringes may be used twice, causing some medical units to operate illegally. Driven by economic interests, they use disposable syringes twice or even multiple times. Therefore, it is an urgent demand in the market to design a disposable syringe with a self-destruct function to prevent the possibility of the disposable syringe being used again. [0003] Because the needle of the syringe is exposed outside after use, it is easy to stab the ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): A61M5/178A61M5/34A61M5/50
Inventor 冯宗博王晓龙陈建华杨俊丽
Owner 浙江龙德医药有限公司