| 摘要 |
A door lock is provided to prevent a password from being exposed due to wearing extent of key buttons, fingerprints adhered on the key buttons, or a pattern pushing down the key buttons, by shifting the position of a cover member to the key buttons. A door lock includes a button unit(20) having key buttons(22) arranged on a body(11), a cover member(30) positioned on the exterior of the button unit and pushing the key button by touch of a user, and a shift member installed to the body and connected to the cover member to shift the position of the cover member to the key button. The shift member has a front cover(40) rotatably installed to the front surface of the body, a rotary shaft(41) serving as a rotary shaft of the front cover, and a drive gear(43) and a driven gear(44) which are installed on the rotary shafts.
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