# US 12,001,247 B2 · Hinge mechanism and foldable device having same

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- Number: US 12,001,247 B2
- Document ID: US12001247B2
- Status: Granted
- Kind: B2
- Application number: 17/309,329
- Filed: 2020-08-25
- Published: 2021-10-21
- Granted: 2024-06-04
- Earliest claimed: 2019-08-27
- Assignees: Google Inc.
- Applicants: Google LLC
- Inventors: Angus Hsu; Dennis Shen
- Web page: https://patentgrep.com/patent/US12001247B2

## CPC

- G06F 1/1681: {Details related solely to hinges (hinge details related to the transmission of signals or power are classified in G06F1/1683)}
- G06F 1/1652: {the display being flexible, e.g. mimicking a sheet of paper, or rollable}
- H04M 1/0216: {Foldable in one direction, i.e. using a one degree of freedom hinge}
- H04M 1/0268: {including a flexible display panel}
- E05Y 2999/00: Subject-matter not otherwise provided for in this subclass
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08)
- E05Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF

## Abstract

A foldable device may include a foldable layer and a hinge mechanism. The hinge mechanism may include a plurality of hinge segments, arranged in a plurality of rows, and with adjacent hinge segments being movably coupled so as to guide a folding and an unfolding motion of the foldable layer.

## Claims

### Claim 1

A hinge mechanism for a computing device, the hinge mechanism comprising:
a plurality of hinge segments, including a plurality of first hinge segments and a plurality of second hinge segments alternately arranged in a row, each of the plurality of hinge segments being movably coupled to an adjacent hinge segment of the plurality of hinge segments, wherein
each first hinge segment includes:
a first recess formed in a main body of the first hinge segment;
a second recess formed in the main body of the first hinge segment; and
a central wall positioned between the first recess and the second recess; and
each second hinge segment includes:
a first protrusion formed at a first end portion of a main body of the second hinge segment, wherein the first protrusion is movably coupled in the first recess of a first hinge segment adjacent to the first end portion of the second hinge segment at which the first protrusion is formed; and
a second protrusion formed at a second end portion of the main body of the second hinge segment, wherein the second protrusion is movably received in the second recess of a first hinge segment adjacent to the second end portion of the second hinge segment at which the second protrusion is formed, wherein
the hinge mechanism is installed in the computing device at a position corresponding to a bendable section of a foldable display, and
wherein the foldable display rests against at least one of the plurality of first hinge segments and against at least one of the plurality of second hinge segments when the computing device is in an unfolded configuration.

### Claim 2 (depends on 1)

The hinge mechanism of claim 1, wherein
for each first hinge segment of the plurality of first hinge segments, the main body of the first hinge segment is elongated so as to extend longitudinally from a first end portion to a second end portion of a foldable layer of computing device, and the first recess and the second recess extend longitudinally along a length of the main body of the first hinge segment, from the first end portion to the second end portion of the foldable layer of the computing device, and
for each second hinge segment of the plurality of second hinge segments, the main body of the second hinge segment is elongated so as to extend longitudinally from the first end portion to the second end portion of the foldable layer of the computing device, and the first protrusion and the second protrusion each extend longitudinally along a length of the main body of the second hinge segment, from the first end portion to the second end portion of the foldable layer of the computing device, and
wherein the movable coupling of the first protrusion of each second hinge segment in the first recess of the adjacent first hinge segment, and the movably coupling of the second protrusion of each second hinge segment in the second recess of the adjacent first hinge segment movably couples the plurality of hinge segments along a longitudinal length of the plurality of hinge segments.

### Claim 3 (depends on 1)

The hinge mechanism of claim 1, wherein
the second hinge segment and the first hinge segment adjacent to the first end portion of the second hinge segment are rotatable about a first central axis defined by the first protrusion of the second hinge segment rotatably coupled in the first recess of the first adjacent hinge segment; and
the second hinge segment and the first hinge segment adjacent to the second end portion of the second hinge segment are rotatable about a second central axis defined by the second protrusion of the second hinge segment rotatably coupled in the second recess.

### Claim 4 (depends on 3)

The hinge mechanism of claim 3, wherein the rotation about the first central axis of the first protrusion rotatably coupled in the first recess of the first hinge segment adjacent to the first end portion of the second hinge segment is independent of the rotation about the second central axis of the second protrusion rotatably received in the second recess of the first hinge segment adjacent to the second end portion of the second hinge segment.

### Claim 5 (depends on 3)

The hinge mechanism of claim 3, wherein
an outer peripheral contour of the first protrusion is arcuate, and an inner peripheral contour of the first recess of the first hinge segment adjacent to the first end portion of the second hinge segment is arcuate, corresponding to the outer peripheral contour of the first protrusion, so as to guide rotational movement of the first protrusion in the first recess; and
an outer peripheral contour of the second protrusion is arcuate, and an inner peripheral contour of the second recess the first hinge segment adjacent to the second end portion of the second hinge segment is arcuate, corresponding to the outer peripheral contour of the second protrusion, so as to guide rotational movement of the second protrusion in the second recess.

### Claim 6 (depends on 5)

The hinge mechanism of claim 5, wherein
a contact arc between an outer circumferential surface of the first protrusion and an inner circumferential surface of the first recess of the first hinge segment adjacent to the first end portion of the second hinge segment is greater than 180 degrees; and
a contact arc between an outer peripheral surface of the second protrusion and an inner circumferential surface of the second recess of the first hinge segment adjacent to the second end portion of the second hinge segment is greater than 180 degrees.

### Claim 7 (depends on 3)

The hinge mechanism of claim 3, further comprising a first stopping mechanism configured to restrict rotation of the plurality of hinge segments in a first direction, the first stopping mechanism including:
a first stopping surface defined on the main body of the second hinge segment, at a proximal end portion of the first protrusion; and
a stopping protrusion formed at an end portion of the main body of the first hinge segment adjacent to the first end portion of the second hinge segment,
wherein, in an unfolded configuration, the stopping protrusion of the first hinge segment abuts the first stopping surface of the second hinge segment, so as to limit further rotation of the first and second hinge segments in the first direction.

### Claim 8 (depends on 7)

The hinge mechanism of claim 7, wherein in the unfolded configuration, the stopping protrusion of the first hinge segments abuts the first stopping surface of the second hinge segment so as to limit relative rotation of the first and second hinge segments to less than or equal to a previously set maximum bending radius.

### Claim 9 (depends on 7)

The hinge mechanism of claim 7, further comprising a second stopping mechanism configured to restrict rotation of the plurality of hinge segments in a second direction, the second stopping mechanism including:
a second stopping surface defined on the main body of the second hinge segment, at a distal end portion of the first protrusion; and
a central stopping surface defined on the central wall of the first hinge segment adjacent to the first end portion of the second hinge segment, facing the second stopping surface,
wherein, in a folded configuration, the second stopping surface of the second hinge segment abuts the central stopping surface defined on the central wall of the first hinge segment, so as to limit further rotation of the first and second hinge segments in the second direction.

### Claim 10 (depends on 9)

The hinge mechanism of claim 9, wherein in the folded configuration, the second stopping surface of the second hinge segment abuts the central stopping surface of the first hinge segment so as to limit relative rotation of the first and second hinge segments to greater than a previously set minimum bending radius.

### Claim 11 (depends on 3)

The hinge mechanism of claim 3, further comprising a plurality of caps positioned at opposite end portions of the plurality of hinge segments so as to respectively retain the first and second protrusions in the first and second recesses.

### Claim 12

A foldable device, comprising:
a housing;
a foldable display; and
a hinge mechanism provided in the housing, at a position in the housing corresponding to a bendable section of the foldable device and a bendable section of the foldable display, wherein the hinge mechanism rotatably couples a first portion of the housing and a second portion of the housing, the hinge mechanism including a plurality of longitudinally arranged hinge segments, including a plurality of first hinge segments alternately arranged with a plurality of second hinge segments, each of the plurality of hinge segments being movably coupled to an adjacent hinge segment of the plurality of hinge segments, wherein
each first hinge segment includes:
a first recess formed in a first end portion of a main body of the first hinge segment;
a second recess formed in a second end portion of the main body of the first hinge segment; and
a central wall positioned between the first recess and the second recess; and
each second hinge segment includes:
a first protrusion formed at a first end portion of a main body of the second hinge segment; and
a second protrusion formed at a second end portion of the main body of the second hinge segment;
wherein the first protrusion is configured to be movably received in the first recess of an adjacent first hinge segment, and the second protrusion is configured to be movably received in the second recess of an adjacent first hinge segment; and
wherein the foldable display rests against at least one of the plurality of first hinge segments and against at least one of the plurality of second hinge segments when the foldable device is in an unfolded configuration.

### Claim 13 (depends on 12)

The foldable device of claim 12, wherein
a first pivot axis is defined by the first protrusion movably received in the first recess; and
a second pivot axis is defined by the second protrusion movably received in the second recess.

### Claim 14 (depends on 13)

The foldable device of claim 13, wherein rotation about the first pivot axis of the first protrusion rotatably coupled in the first recess is independent of rotation about the second pivot axis of the second protrusion rotatably received in the second recess.

### Claim 15 (depends on 12)

The foldable device of claim 12, further comprising a first stopping mechanism, including:
a first stopping surface defined on the main body of the second hinge segment, at a proximal end portion of at least one of one of the first protrusion or the second protrusion; and
a stopping protrusion formed at an end portion of the main body of the first hinge segment and configured to selectively abut the first stopping surface based on a relative position of the first hinge segment and the second hinge segment,
wherein, in an unfolded configuration, the stopping protrusion abuts the first stopping surface, so as to limit further rotation of the first and second hinge segments in a first direction.

### Claim 16 (depends on 15)

The foldable device of claim 15, wherein the first stopping mechanism is configured to limit relative rotation of the first and second hinge segments to less than or equal to a previously set maximum bending radius.

### Claim 17 (depends on 15)

The foldable device of claim 15, further comprising a second stopping mechanism, including:
a second stopping surface defined on the main body of the second hinge segment, at a distal end portion of at least one of the first protrusion or the second protrusion; and
a central stopping surface defined on the central wall of the first hinge segment, facing the second stopping surface,
wherein, in a folded configuration, the second stopping surface of the second hinge segment abuts the central stopping surface defined on the central wall of the first hinge segment, so as to limit further rotation of the first and second hinge segments in a second direction.

### Claim 18 (depends on 17)

The foldable device of claim 17, wherein the second stopping mechanism is configured to limit relative rotation of the first and second hinge segments to greater than a previously set minimum bending radius.