| 摘要 |
A device comprises a device substance, a button, a button restriction element, and a circuit board. The device substance has a button opening. The button comprises a button substance, a first fixing element, a second fixing element, and a driving element. The button substance locates in the button opening. The first fixing element fixes on the first side of the button substance and wedges with the device substance. The second fixing element fixes on the second side of the button substance. The driving element locates on the button substance. The circuit board has a driving point, which is located correspondingly to the driving element. The button restriction element, capable of restricting the motion of the second fixing element to reduce buttons oblique.
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