an injection pen

A technology for injection pens and refills, applied in the field of injection pens, can solve problems such as difficult mass production, unacceptable consumers, complex assembly process, etc., and achieve the effects of irreversibility, simple structure, and improved economic benefits

Active Publication Date: 2017-03-08
CHANGZHOU DELFU TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. Most of the existing products are controlled by threaded knobs, and the operation is more complicated;
[0004] 2. Most injection bottles are built-in, which is not conducive to recycling after use and pollutes the environment;
[0005] 3. The product cost is high, and consumers are not easy to accept;
[0006] 4. The assembly process is too complicated to achieve mass production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0042] (1) The pitch of the screw rod is designed to be 1mm, and the thread length is 21mm.

[0043] (2) Exhaust: When the screw button 3 is pressed 5mm, it will rotate 25.2 degrees due to the action of its own thread. The internally threaded jingle wheel 8 will also rotate 25.2 degrees. Since the internal thread has an internal thread with a pitch of 1 mm, when the internally threaded jingle wheel 8 rotates 25.2 degrees, it will also force the push screw 9 to move forward by 0.07 mm, thereby , that is, to achieve the function of exhausting 5 microliters.

[0044] (3) Reset: After the exhaust process is over, the movable thorn wheel 5 will reset upwards under the action of the main spring 6, and the screw button 3 will also reset upwards, but during the upward reset process, it will rotate in the opposite direction, but Under the action of the internal thread thorn wheel 8, the advancing screw mandrel 9 will not reverse, and at this moment, the reset process ends.

[0045] (...

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Abstract

The invention relates to an injection pen. The injection pen comprises an injection pen shell, an external button and a button housing; a spiral button with a pawl, a movable ratchet, a mainshaft spring, a ratchet shaft sleeve, an internal thread ratchet, a pushing screw rod and a pen core shell are arranged inside the injection pen shell. According to the injection pen disclosed by the invention, the operation process is simplified; the injection pen is easier to control; an external medicine bottle is used, so that recycling is facilitated and the production cost of a product is low; the economic benefit is increased.

Description

technical field [0001] The invention relates to the field of medical devices, and specifically discloses an injection pen. Background technique [0002] There are a lot of various injection pens in the market, and there are mainly the following disadvantages: [0003] 1. Most of the existing products are controlled by threaded knobs, and the operation is more complicated; [0004] 2. Most injection bottles are built-in, which is not conducive to recycling after use and pollutes the environment; [0005] 3. The product cost is high, and consumers are not easy to accept; [0006] 4. The assembly process is too complicated to achieve mass production. Contents of the invention [0007] The purpose of the present invention is to provide an injection pen with simple operation, easy control, recyclable medicine bottle after injection, low cost, simple structure and simple assembly process to solve the above problems. [0008] The technical scheme adopted in the present invent...

Claims

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Application Information

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IPC IPC(8): A61M5/24A61M5/31
CPCA61M5/24A61M2005/2026
Inventor 李荣毓王少锋许云初
Owner CHANGZHOU DELFU TECH
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