Blood drawing pen with needle withdrawing function and assembling method

A blood collection pen and needle withdrawal technology, which is applied in the field of medical devices, can solve the problems of inconvenient removal of the blood collection needle, inconvenience for the operator to hold, accidental injury to the operator, etc., and achieve the effect of wide application range, stable connection, and avoiding potential safety hazards

Pending Publication Date: 2018-11-20
TIANJIN HUAHONG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many of the existing blood collection pens do not have the function of withdrawing the needle. It is very inconvenient to remove the blood collection needle after use and may even accidentally injure the operator. Some blood collection pens have the function of withdrawing the needle, but the operatio

Method used

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  • Blood drawing pen with needle withdrawing function and assembling method
  • Blood drawing pen with needle withdrawing function and assembling method
  • Blood drawing pen with needle withdrawing function and assembling method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0067] In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

[0068] see Figure 1 to Figure 27 :

[0069] A blood collection pen capable of withdrawing needles, mainly comprising a pen cover 1, a percussion needle withdrawal structure 2, a blood collection needle 3, a tail cap 4 and a pen cap 5;

[0070] The percussion needle withdrawal structure 2 includes a guide sleeve 21, an inner core 22, a needle withdrawal key 23, a needle withdrawal inner core 24, an elastic member 25 and a button 26;

[0071] Such as Figure 4-7 As shown, the pen case 1 is an axially hollow shell, and the middle part of the pen case 1 is radially provided with a partition 11 for controlling the position of the elastic member 25, and the partition 11 divides the cavity of the pen case 1 into two; The center of the separator ...

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PUM

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Abstract

The invention discloses a blood drawing pen with a needle withdrawing function and an assembling method. The blood drawing pen mainly comprises a pen loop, a percussion needle withdrawing structure, ablood drawing needle, a tail cap and a pen cap. A guide sleeve is inserted into the pen loop. A limiting structure for controlling the advancing distance of an inner core is arranged in the guide sleeve. The inner core comprises a needle seat part for fixing the blood drawing needle, and the tail end of the needle seat part is connected with an inner core arm for being sleeved with an elastic part. A needle withdrawing key is arranged in the pen loop. The needle withdrawing inner core is in an L shape, and comprises a second convex rib and a hanging table limited between a first clamping table and a second clamping table. The elastic part comprises a transmitting spring, a first reset spring and a second reset spring with which the inner core arm is sleeved. When needle withdrawing is carried out after blood drawing, the percussion needle withdrawing structure is arranged in the blood drawing pen, the tail cap arranged at the rear end of the blood drawing pen pushes the percussion needle withdrawing structure to advance, thus, the blood drawing needle is pushed to be separated from the needle seat part, blood drawing and needle withdrawing processes are continuous, and potential safety hazards are effectively avoided.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a needle-retractable blood collection pen and an assembly method thereof. Background technique [0002] The blood collection pen is a pen-shaped blood collection device that is used in conjunction with a disposable sterile blood collection needle to collect peripheral blood samples from the human body and is a manual ejection auxiliary blood collection device. After the blood collection is completed, since the needle has been adhered with human blood, the used needle must be disposed of to prevent medical staff or other people from being stabbed by the needle. Many of the existing blood collection pens do not have the function of withdrawing the needle. It is very inconvenient to remove the blood collection needle after use and may even accidentally injure the operator. Some blood collection pens have the function of withdrawing the needle, but the operation is cumbersome...

Claims

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Application Information

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IPC IPC(8): A61B5/151
CPCA61B5/150022A61B5/150274A61B5/150374A61B5/15101
Inventor 张立波崔成哲
Owner TIANJIN HUAHONG TECH
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