# US 11,442,509 B2 · Rotating shaft and electronic device

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- Number: US 11,442,509 B2
- Document ID: US11442509B2
- Status: Granted
- Kind: B2
- Application number: 17/033,209
- Filed: 2020-09-25
- Published: 2021-04-01
- Granted: 2022-09-13
- Earliest claimed: 2019-09-26
- Assignees: Lenovo (Beijing) Limited
- Applicants: Lenovo (Beijing) Co., Ltd.
- Inventors: Ran Zhang; Jinzhong Shi; Liang Han; Tianshui Tan; Shibo Rui
- Web page: https://patentgrep.com/patent/US11442509B2

## CPC

- G06F 1/1681: {Details related solely to hinges (hinge details related to the transmission of signals or power are classified in G06F1/1683)}
- E05D 3/12: with two parallel pins and one arm
- G06F 1/1616: {with folding flat displays, e.g. laptop computers or notebooks having a clamshell configuration, with body parts pivoting to an open position around an axis parallel to the plane they define in closed position}
- G06F 1/1652: {the display being flexible, e.g. mimicking a sheet of paper, or rollable}
- 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)
- E05D: HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS (pivotal connections in general F16C11/00)
- 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 rotating shaft configured to connect two screen-brackets includes two axle structures arranged symmetrically. One of the two axle structures includes an axle, a motion conversion structure, a screen bracket connection structure, and a supporting bracket. The axle includes a worm groove at a surface of the axle. The motion conversion structure cooperates with the worm groove to form a worm drive. The screen bracket connection structure is movably connected to the motion conversion structure and includes mounting holes, which are configured to mount the screen-brackets. The supporting bracket is sleeved at the axle, rotates around an axis of the axle, and is movably connected to the motion conversion structure and the screen bracket connection structure. The motion conversion structure is movable along an axis direction of the axle on a first surface relative to the supporting bracket.

## Claims

### Claim 1

A rotating shaft configured to connect two screen-brackets, comprising:
two axle structures arranged symmetrically, one of the two axle structures including:
an axle including a worm groove at a surface of the axle;
a motion conversion structure cooperating with the worm groove to form a worm drive;
a screen bracket connection structure movably connected to the motion conversion structure and including mounting holes being configured to mount the two screen-brackets; and
a supporting bracket sleeved at the axle, rotating around an axis of the axle, and movably connected to the motion conversion structure and the screen bracket connection structure;
wherein:
the motion conversion structure is movable along an axis direction of the axle on a first surface relative to the supporting bracket;
the screen bracket connection structure is movable along a radial direction of the axle on the first surface relative to the supporting bracket;
the first surface is a surface where the supporting bracket is located;
the screen bracket connection structure includes a track groove; and
the motion conversion structure includes a first protrusion embedded in the worm groove and cooperating with the worm groove to form the worm drive, and a second protrusion embedded in the track groove and moving along a trajectory of the track groove in the track groove.

### Claim 2 (depends on 1)

The rotating shaft of claim 1, wherein the trajectory of the track groove is configured to allow a distance between opposite sides of the two screen-brackets to be maintained at a fixed value when the two screen-brackets rotate.

### Claim 3 (depends on 1)

The rotating shaft of claim 1, wherein the supporting bracket includes:
a second sleeve sleeved at the axle and rotating around the axis of the axle;
a radial movement connection structure movably connected to the motion conversion structure; and
an axial movement connection structure movably connected to the screen bracket connection structure.

### Claim 4 (depends on 3)

The rotating shaft of claim 3, wherein:
the radial movement connection structure includes a third protrusion;
the motion conversion structure includes a hole; and
the third protrusion is embedded in the hole.

### Claim 5 (depends on 3)

The rotating shaft of claim 3, wherein:
the radial movement connection structure includes a radial sliding clamp structure; and
the radial sliding clamp structure is configured to clamp the screen bracket connection structure.

### Claim 6 (depends on 1)

The rotating shaft of claim 1, further comprising a synchronization structure configured to connect the two axle structures and synchronously mirror movements of the two axle structures.

### Claim 7

An electronic device, comprising:
two screen-brackets; and
a rotating shaft configured to connect the two screen-brackets, the rotating shaft including:
two axle structures arranged symmetrically, one of the two axle structures including:
an axle including a worm groove at a surface of the axle;
a motion conversion structure cooperating with the worm groove to form a worm drive;
a screen bracket connection structure movably connected to the motion conversion structure and including mounting holes being configured to mount the two screen-brackets; and
a supporting bracket sleeved at the axle, rotating around an axis of the axle, and movably connected to the motion conversion structure and the screen bracket connection structure;
wherein:
the motion conversion structure is movable along an axis direction of the axle on a first surface relative to the supporting bracket;
the screen bracket connection structure is movable along a radial direction of the axle on the first surface relative to the supporting bracket;
the first surface is a surface where the supporting bracket is located;
the screen bracket connection structure includes a track groove; and
the motion conversion structure includes a first protrusion embedded in the worm groove and cooperating with the worm groove to form the worm drive, and a second protrusion embedded in the track groove and moving along a trajectory of the track groove in the track groove.

### Claim 8 (depends on 7)

The device of claim 7, wherein:
a distance between opposite sides of the two screen-brackets is maintained at a fixed value when the two screen-brackets rotate around the axis to an arbitrary angle.

### Claim 9 (depends on 7)

The device of claim 7, further comprising:
a flexible screen mounted at the two screen-brackets.

### Claim 10 (depends on 7)

The device of claim 7, wherein the supporting bracket includes:
a second sleeve sleeved at the axle and rotating around the axis of the axle;
a radial movement connection structure movably connected to the motion conversion structure; and
an axial movement connection structure movably connected to the screen bracket connection structure.

### Claim 11 (depends on 10)

The device of claim 10, wherein:
the radial movement connection structure includes a third protrusion;
the motion conversion structure includes a hole; and
the third protrusion is embedded in the hole.

### Claim 12 (depends on 10)

The device of claim 10, wherein:
the radial movement connection structure includes a radial sliding clamp structure; and
the radial sliding clamp structure is configured to clamp the screen bracket connection structure.

### Claim 13 (depends on 7)

The device of claim 7, wherein the rotating shaft further includes a synchronization structure configured to connect the two axle structures and synchronously mirror movements of the two axle structures.