Key structure

Abstract

The invention discloses a key structure. The key structure comprises a bottom plate, an elastomer and a key cap; the bottom board has a concave space; the key cap consists of a key top and a key skirt connected with the periphery of the key top; the key cap has a combination part which protrudes from the lower surface of the key top to the bottom plate, and a limiting part; the elastomer has a projection range on the lower surface of the key top before the key cap is pressed down; the limiting part is arranged corresponding to the elastomer, and a preset distance is kept between the limiting part and the projection range; when the key cap is pressed to move towards the bottom plate, the lower surface of the key top presses the elastomer in a prop-against manner to enable the elastomer to be elastically deformed; the limiting part presses the bottom plate in a prop-against manner to define the lowest position of the key cap; and when the key cap is in the lowest position, the deformed elastomer does not exceed the preset distance and the deformed elastomer does not extend to the lower side of the limiting part. According to the key structure, the partial rigidity of the key cap can be reinforced and the pressing travel can be defined, so as to effectively lower excessive elastomer deformation caused by key cap deformation and to further reduce damage probability of the elastomer.

Description

technical field [0001] The invention relates to a key structure, in particular, the invention relates to a key structure with deformation safety design. Background technique [0002] The operation of the conventional key structure is usually by pressing the key cap, and then compressing the elastic body to trigger the switch circuit to generate a trigger signal, and the key cap returns to the position before pressing by the restoring force of the elastic body. However, the keycaps of multiple keys (such as blank (Space) key, input (Enter) key, large character (Caps Lock) key, displacement (Shift) key, etc.) The rigidity is weak. Therefore, after pressing such a button, the keycap usually produces local deformation (for example, a concave deformation occurs in the middle of the keycap), and further compresses the elastic body, causing the elastic body to deform more than expected, causing the elastic body to deform. Excessive compression deformation reduces the life of the ...

AI Technical Summary

Problems solved by technology

However, the keycaps of multiple keys (such as blank (Space) key, input (Enter) key, large character (Caps Lock) key, displacement (Shift) key, etc.) The rigidity is weak

Therefore, after pressing such a button, the keycap usually produces local deformation (for example, a concave deformation occurs in the middle of the keycap), and further compresses the elastic body, causing the elastic body to deform more than expected, causing the elastic body to deform. Excessive compression deformation reduces the life of the elastomer, or even makes the keys inoperable

Images