Key lifting switch device and assembling fixture and assembling technology thereof

Abstract

The invention discloses a key lifting switch device, comprising a keycap, a retractable assembly positioned above a base plate, a switch mechanism for closing and opening the key signal corresponding to the keycap lifting action, the retractable assembly comprises a pair of frames which are impossible to contact with each other, are arranged in a reciprocal manner and form a cavity, the corresponding bottom edges of the two frames can be arranged in two sliding kits which are preset at the two sides of the base plate in a sliding manner, the respective corresponding top parts thereof are arranged with two pivoting-arranged kits which are preset on the bottom of the keycap in a pivoting manner; synchronous sliding pieces used for pressing the synchronous lifting of the pair of frames penetrates the cavity of the pair of the frames, one side thereof is arranged on the base plate and the other side thereof is limited to move along with the retractable movement of the bottom surface of the keycap. In addition, the invention also discloses an assembling fixture and an assembling technology corresponding to the switch device. Compared with the prior art, in the invention, the structure of the key lifting switch device is simplified, the assembling fixture and the assembling technology are improved, thus the production efficiency of keyboards and the finished product acceptability are further improved.

Description

【Technical field】 [0001] The present invention relates to a key lift switch device for a keyboard, in particular to a key lift switch device for an ultra-thin key in a keyboard as an input device of an electronic instrument, and also to an automatic assembly method for a key corresponding to the one-key lift switch device. 【Background technique】 [0002] Jingyuan Computer Co., Ltd., an applicant from Taiwan Province of China, applied in China with the subject of "ultra-thin keyboard keys", which was announced on March 1, 2000, with the announcement number CN2366889Y. This patent represents the mainstream structure of early ultra-thin keyboard keys, which is widely used in keyboards of various notebook computers and is welcomed to a certain extent. Please refer to the instruction manual of the announcement for its structure, which mainly includes keycap, positioning plate, first frame, second frame, elastic body, thin film circuit board and bottom plate. part and several pos...

AI Technical Summary

Problems solved by technology

[0003] The biggest deficiency of this structure of CN2366889Y lies in the resulting assembly process, the assembly between its first frame and the second frame, the assembly of the first frame and the second frame and the keycap and positioning plate, and the overall Assembling the structure, etc., due to the cooperation of multiple tiny holes and pivots, it is not convenient to realize streamlined production, thus affecting production efficiency

It is this limitation that causes the technical solutions of the two patents cited in the present invention to be unable to overcome the defects of the assembly process

The defect of CN2366889Y has been analyzed before, and the defect of CN1716483A is also obvious. In addition to the inconvenience of installing the sliding end of the connecting rod part on the positioning plate, the more important thing is the assembly of the toothed meshing relationship of the connecting rod part. It is often difficult to perfectly cooperate with each other, resulting in a low yield of finished products

[0007] In addition, the connecting rod part of CN1716483A patent announcement is not easy to be injection-molded in the meshing shape during use, but must exist in the injection mold at a distance, and must be manually repositioned on the positioning plate and the keycap after injection molding between them, or use a jig-type assembly method to reassemble and install the separated injection-molded connecting rod parts, it is difficult to control the assembly accuracy and labor costs

[0008] Furthermore, the connecting rod parts or scissor-type frames with engaging functions recorded in the above two announcements still need to be reassembled by hand or with jigs after injection molding, and due to the miniaturization and ultra-thin requirements of the keyboard, The above-mentioned connecting rod parts or frames are becoming smaller and smaller, so the accuracy of the fixture is not easy to achieve

[0009] However, a large number of related patents represented by the above two patent announcements now exist in the patent databases of various countries and regions in the world, which fully proves that the inertial thinking of researchers in this field is based on "connecting rod components" and has not been able to get out of this for many years. On the other hand, due to the deliberate superposition of each patent and the vested rights of the patentee, it further restricts the R&D personnel's R&D thinking and cannot fly freely.

Thus, at least during the recent past, applicants believe that no technological leaps have been made in key lift switch devices.

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