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Needle retracting mechanism, needle holder and hypodermic syringe

A technology of syringe and needle chuck, applied in the field of needle reduction mechanism, can solve the problems of brittle parts, weak mechanical strength, easy deformation or damage, etc.

Inactive Publication Date: 2003-04-23
SYRINGUS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Resulting parts are brittle, mechanically weak and therefore easily deformed or damaged

Method used

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  • Needle retracting mechanism, needle holder and hypodermic syringe
  • Needle retracting mechanism, needle holder and hypodermic syringe
  • Needle retracting mechanism, needle holder and hypodermic syringe

Examples

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Embodiment Construction

[0051] FIG. 1 shows a needle chuck 33 with an automatic needle retraction mechanism 1 according to the invention. The needle retracting mechanism includes a housing 3, the first end 5 of which is matched with the outlet 19 of the syringe barrel 7 of the disposable hypodermic syringe 2, so as to receive injection liquid from the syringe barrel 7 during use. The syringe 2 is available in various sizes, while its outlet 19 is designed as a standard luer fitting. Thus, the needle cartridge 33 can be used with many different standard syringes.

[0052] The second end 6 of the housing 3 slidably supports the needle 27 , and the needle 27 can be retracted into the retracting chamber 4 of the housing 3 by the force generated by the pretensioned actuator 8 . The actuator 8 is held in the pretensioned position by the stop means 9, which is a helical spring.

[0053] figure 2 It is an enlarged view of the automatic needle shrinking mechanism shown in Fig. 1 . The stop means 9 compris...

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Abstract

An automatic needle retracting mechanism (1) for a hypodermic syringe (2) comprises a body (3) which slidingly supports a needle (27). A retainer (9) for an actuator (8) and the needle (27) is kept in a retaining position by a spacer (11), which after some time in contact with an injectant loses its mechanical strength. A filing of the needle with an injectant causes a deformation of the spacer (11), a release of the actuator (8) and a retracting of the retainer (9) and needle (27) into a needle retraction chamber (4). The needle retracting mechanism may also include an inner sleeve (20) which is manually movable towards the retainer (9) for a manual release of the actuator (8). The needle retracting mechanism may be included in a needle holder (33) or integrated in a syringe (2').

Description

technical field [0001] The present invention relates to a needle shrinking mechanism of a hypodermic syringe, which comprises a housing with a needle shrinking chamber, the first end of the housing is used to receive the injection liquid from the syringe barrel, and the second end is slidably supporting a needle. The needle is retracted into the retraction chamber by force from a pretensioned actuator. As the injection fluid enters, the actuator is released. [0002] The invention also relates to a needle chuck for a hypodermic syringe, which includes a needle retraction mechanism. [0003] The invention also relates to a hypodermic syringe comprising a barrel and a plunger, the syringe comprising a needle retraction mechanism. Background technique [0004] The needle of a used syringe is dangerous, not only the needle itself, but also a source of infection. Reusing a syringe is especially dangerous for infection. [0005] Most syringes are singl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/32
CPCA61M5/3234A61M2005/3235
Inventor 特杰·斯文德森
Owner SYRINGUS
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