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Key board upper cover without connecting line and its forming method

A keyboard and key base technology, applied in the field of forming the upper cover of the keyboard, can solve the problems affecting the appearance of the finished product, the length of the runner, etc.

Inactive Publication Date: 2008-05-07
DARFON ELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in addition to the long flow channel, multi-point feeding also has the problem of joint line
That is, after the plastic is injected from multiple feed points, it will form a joint line 103 at the meeting point and affect the appearance of the finished product

Method used

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  • Key board upper cover without connecting line and its forming method
  • Key board upper cover without connecting line and its forming method
  • Key board upper cover without connecting line and its forming method

Examples

Experimental program
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Embodiment Construction

[0015] The main spirit of the present invention is to use a single feed point 201 instead. This eliminates bond lines where the plastics meet. In order to cooperate with single-point feeding, a larger-diameter feeding point 201 must be used. An opening 205 is therefore utilized as a feed point. After demoulding, a movable key base is added to form a complete keyboard cover.

[0016] image 3 It is a flowchart of an embodiment of the method according to the present invention. The keyboard top cover formed in this embodiment includes an opening. refer to image 3 and Figure 4 , first use the periphery of the opening 405 as the feeding point 401, and fill the plastic into the mold 407 through the feeding point 401 to form the semi-finished keyboard cover 419 (step 304). Then throw off the mold 407, and take out the semi-finished product 419 of the keyboard upper cover (step 306). refer to image 3 and Figure 5 , and then cut off the material head 509 on the semi-finis...

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Abstract

An upper cover of keyboard has an opening and is prepared through filling plastics in a mould from said opening to obtain a semi-finished upper cover, demoulding, and binding a movable key shelf with said opening to obtain finished upper cover. Its advantages are beautiful appearance and simple technology.

Description

technical field [0001] The invention relates to a method for forming a keyboard top cover, and a keyboard top cover formed by the method. Background technique [0002] Please refer to figure 1 , it can be seen that the finished keyboard cover needs to include many fixed key bases. Each key base is for inserting a key cap. Therefore, when making the keyboard top cover with the prior art, it is impossible to utilize the position of fixing the key base to feed materials. But can only utilize the gap feeding between fixed key base positions. This requires the use of feed points 101 with a diameter not greater than 1 mm. [0003] However, since the diameter of the feeding point 101 is not greater than 1mm, multiple feeding points are required to complete the molding. However, in addition to the long flow channel, multi-point feeding also has the problem of joint line. That is, after the plastic is injected from a plurality of feeding points, a joint line 103 will be formed ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/17G06F3/023
Inventor 赵世宏柳毓宏
Owner DARFON ELECTRONICS CORP