Delay mechanism suitable for compact automatic injection device

一种自动注射、注射器的技术，应用在自动注射器、注射器、皮下注射器械等方向，能够解决可靠性低可靠性、时间长等问题，达到可靠保持的效果

Inactive Publication Date: 2015-11-04
ELI LILLY & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] A problem with at least some automatic injection devices that have a delay mechanism is that the devices take longer than some users are comfortable with when they are placed on the injection site
[0004] Another problem with at least some automatic injection devices having a delay mechanism is that the reliability of the device used to hold the needle in the retracted position after use is lower than desired
The device for the needle may be accidentally released from the locked position after use, although the device has been subjected to relatively small impact or external force

Method used

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  • Delay mechanism suitable for compact automatic injection device
  • Delay mechanism suitable for compact automatic injection device
  • Delay mechanism suitable for compact automatic injection device

Examples

Experimental program
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Embodiment Construction

[0029] exist figure 1 A perspective view of a first embodiment of an automatic injection device, generally designated 20, having a delay mechanism of the present invention is shown in . exist Figure 2-Figure 4 In , device 20 is schematically illustrated with a simple syringe with a needle and with its needle cover which collapses during use and is pierced during injection, not shown. exist figure 2 The display device 20 is unlocked by rotating the safety sleeve 32 around the housing body 34 (as indicated by arrow 23 ) to the unlocked angular position. After the device is unlocked and when the trigger button 21 is pressed (as indicated by arrow 24), the needled syringe 25 of the device 20 is automatically driven downward so that the injection needle 27 of the syringe 25 protrudes beyond the bottom end of the device housing thereby impale the user, such as image 3 shown in . The device then switches to automatic injection, which requires no further action by the user, th...

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Abstract

A delay mechanism for an automatic injection device having a housing and a medication filled syringe. The delay mechanism includes a shuttle, a follower, a damping compound, at least one biasing member, and a biased plunger element. When moved in the device housing from a first location to a second location, the biased plunger element is adapted to drive the syringe piston within syringe barrel to force medication through the syringe needle for an injection. The follower, when the plunger element is so moved, is freed to move, under urging of the at least one biasing member, from a first position on the housing toward a second position to thereby move the shuttle for retracting the syringe needle into the housing after injection. The damping compound dampens or slows rotation of the follower as the follower moves from the first position toward the second position.

Description

technical field [0001] The present invention relates to drug injection devices and in particular to a mechanism for delaying needle retraction of an automatic injection device. Background technique [0002] Patients with a number of different diseases often have to inject themselves with drugs. Various devices have been proposed to simplify these injections. One type of device is an automatic injection device. This type of device, when triggered by the user or by someone assisting the user, automatically inserts a syringe needle, which was placed inside the device housing prior to triggering, into the user, and then automatically injects a drug through the inserted needle. dose of the drug. One known type of automatic injection device then automatically advances the shield to cover the needle when the dose is completed. In another type of automatic injection device that is of a more desirable configuration than having a travel shroud, the device will automatically retrac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/20
CPCA61M5/2033A61M5/326A61M2005/206A61M5/3234
Inventor J.A.富尔特B.J.辛普森
Owner ELI LILLY & CO
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