# US 8,769,773 B2 · Opening and closing device

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- Number: US 8,769,773 B2
- Document ID: US8769773B2
- Status: Granted
- Kind: B2
- Application number: 13/811,713
- Filed: 2011-07-20
- Published: 2014-01-30
- Granted: 2014-07-08
- Earliest claimed: 2010-07-26
- Assignees: Mitsubishi Steel Mfg. Co., Ltd.
- Applicants: Tetsuya Katsuta
- Inventors: Tetsuya Katsuta
- Web page: https://patentgrep.com/patent/US8769773B2

## CPC

- H04M 1/0216: {Foldable in one direction, i.e. using a one degree of freedom hinge}
- G06F 1/1624: {with sliding enclosures, e.g. sliding keyboard or display}
- H04M 1/0237: {Sliding mechanism with one degree of freedom}
- H04M 1/0212: {with a two degrees of freedom mechanism, i.e. folding around a first axis and rotating around a second axis perpendicular to the first}
- H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08)
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)

## Abstract

An opening and closing device includes a fixed frame including a shaft receiving part and fixed to a first housing, a movable plate configured to be rotationally movable relative to the fixed frame, a slide plate configured to be slidable relative to the movable plate and fixed to a second housing, multiple arms of the same length provided between the shaft receiving part and the movable plate to have respective one ends received by the shaft receiving part and respective other ends received by the movable plate, and a slide mechanism configured to cause the slide plate to slide relative to the movable plate. The slide plate is caused to slide relative to the movable plate by the slide mechanism and the movable plate rotates relative to the fixed frame with turns of the arms, so that the second housing moves between a closed position and an open position.

## Claims

### Claim 1

An opening and closing device, comprising:
a fixed frame including a shaft receiving part and fixed to a first housing;
a movable plate configured to be coupled to and rotationally movable relative to the fixed frame;
a slide plate configured to be slidable relative to the movable plate and fixed to a second housing;
a plurality of arms of a same length provided between the shaft receiving part and the movable plate to have respective one ends pivotally received by the shaft receiving part and respective other ends pivotally received by the movable plate; and
a slide mechanism coupled between the movable plate and the slide plate, said slide mechanism configured to cause the slide plate to slide relative to the movable plate,
wherein the slide plate is caused to slide relative to the movable plate by the slide mechanism and the movable plate rotates relative to the fixed frame with turns of the arms, so that the second housing moves between a closed position where the second housing is superposed on the first housing and an open position where an upper surface of the second housing and an upper surface of the first housing are in a same plane, and
wherein the slide mechanism includes a first semiautomatic mechanism configured to apply an urging force to the slide plate in a first backward direction until sliding the slide plate from an initial slide start position to a predetermined first intermediate reversing position and to apply an urging force to the slide plate in a first forward direction once the slide plate passes the first intermediate reversing position.

### Claim 2 (depends on 1)

The opening and closing device as claimed in claim 1, wherein the arms are provided parallel to each other between the shaft receiving part and the movable plate.

### Claim 3 (depends on 1)

The opening and closing device as claimed in claim 1, wherein at least one of the arms is provided with a second semiautomatic mechanism configured to apply an urging force to said at least one arm in a second backward direction until turning the arms from the closed position or the open position to a predetermined second intermediate reversing position and to apply an urging force to said at least one arm in a second forward direction once the arms pass the second intermediate reversing position.