Repeated quantitative injector

A technology of a syringe and an injection rod, applied in the field of medical devices, can solve the problems of low injection precision, affecting the treatment effect, inaccurate injection dose control, etc., and achieve the effect of high injection precision and accurate injection dose.

Pending Publication Date: 2022-07-01
宁波睿爱产品设计有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The plunger rod of this patent (equivalent to the piston rod below) needs to move towards the front end under the action of the drive spring for injection, but if the spring ages after repeated use, the injection accuracy will not be high, which will lead to poor injection accuracy. Inaccurate dose control, affecting the therapeutic effect

Method used

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  • Repeated quantitative injector
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Embodiment Construction

[0049] The present invention will be further described in detail below with reference to the embodiments of the accompanying drawings.

[0050] like Figures 1 to 16 As shown, the multiple dose syringe of this preferred embodiment includes a tube body 0 , a medicine bottle 1 , a piston rod 2 , an injection rod 3 , a guide tube 4 , a positioning tube 5 , a limit tube 6 and a bracket 7 . Defines the injection direction of the syringe as top-down.

[0051] like figure 1 , 2 As shown, the top of the bracket 7 is open, and the outside of the bracket 7 is detachably sleeved with a cap body 70 . The cap body 70 is pulled out each time the syringe is used, and the cap body 70 is put on after the injection is completed.

[0052] The medicine bottle 1 is placed in the bracket 7 from top to bottom, the top of the medicine bottle 1 is also open, the medicine bottle 1 is provided with a piston 11 that can move up and down, the piston rod 2 is installed in the tube body 0, and the lower ...

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Abstract

The invention relates to a multi-time quantitative injector which comprises a tube body. A piston capable of moving up and down is arranged in the medicine bottle; the lower end of the piston rod is inserted into the medicine bottle and located above the piston, a plurality of positioning grooves are formed in the peripheral wall of the piston rod at intervals in the length direction of the piston rod, and the positioning grooves extend in the circumferential direction of the piston rod; a plurality of connecting grooves are further formed in the peripheral wall of the piston rod, and every two axially adjacent positioning grooves communicate with each other through one connecting groove; the injection rod is installed in the tube body, located above the medicine bottle and arranged on the piston rod in a sleeving mode, the injection rod can rotate in the circumferential direction relative to the piston rod and can move upwards relative to the piston rod, and positioning blocks are arranged on the inner circumferential wall of the injection rod and can sequentially slide into the positioning grooves from bottom to top along the connecting grooves. And the positioning blocks can be limited in the corresponding positioning grooves in the vertical direction. In the whole process, the force for driving the injection rod to move downwards is completely manpower and does not depend on a spring, the injection precision is high, and it is guaranteed that the injection dosage is accurate every time.

Description

technical field [0001] The invention relates to the technical field of medical appliances, in particular to a multiple-time quantitative syringe. Background technique [0002] The multi-injection syringe is a drug injection device that can divide the drug liquid in the drug bottle into multiple injections into the user's body. Since the multi-injection syringe can be used multiple times, it can better meet the needs of patients. For example, diabetic patients generally need long-term insulin injections to control the disease, and the amount of each injection is not large. If you use a small syringe at a time, it will cause waste. In order to avoid waste and reduce the cost of use, a large syringe can be used to inject in batches. [0003] For example, the Chinese invention patent application with patent number CN202110561355.8 (publication number CN113384776A) discloses "a drug injection device for multiple injections", which includes a casing, a plunger rod axially slida...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/24A61M5/315
CPCA61M5/24A61M5/31511A61M5/31536A61M5/31551A61M5/31578A61M5/31593
Inventor 侯士双陈常娇袁霞林杨林
Owner 宁波睿爱产品设计有限公司
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