Patent ID: 9528299
Filing Date: 2016-12-27
CPC Classification: E05B,E05C,G07C,Y10T

Claim Text:
1. A digital opening and closing device for an entrance, comprising: a housing comprising an outer casing installed on an outdoor surface of a door, and an inner casing coupled to the outer casing with the door interposed between the inner and outer casings; a password input unit provided on the outer casing of the housing, the password input unit being used in inputting a password; a door opening and closing unit installed in the housing, the door opening and closing unit conducting an operation of opening or closing the door in response to a control signal of a control unit; the control unit comparing a password input to the password input unit with a preset reference password and controlling the door opening and closing operation of the door opening and closing unit; an opening button provided on the inner casing of the housing, the opening button being connected to the control unit and used in automatically opening the door; a manual opening button applying a signal to the control unit to prevent the door from being automatically locked when the door is closed; and a power supply supplying drive power to the elements, wherein the door opening and closing unit is configured such that: a door is opened by an operation of pushing or pulling a door handle in a direction in which the door opens; when the door handle is pushed or pulled, opening of the door is sensed by a reduction in speed at which the door handle is pushed or pulled; and locking of the door can be selectively controlled in such a way that the door is automatically locked when the door is closed, or the door is prevented from being automatically locked when the door is closed.