# US 7,744,055 B2 · Electronic device with multi-angle positioning support

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- Number: US 7,744,055 B2
- Document ID: US7744055B2
- Status: Granted
- Kind: B2
- Application number: 12/421,655
- Filed: 2009-04-10
- Published: 2010-01-21
- Granted: 2010-06-29
- Earliest claimed: 2008-07-16
- Assignees: HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD.; Hon Hai Precision Industry Co., Ltd.
- Inventors: Yong-Qing Zeng; Gao-Hui Tang; Chiang-Kuo Tang; Jun Yang
- Web page: https://patentgrep.com/patent/US7744055B2

## CPC

- F16M 13/005: {integral with the apparatus or articles to be supported}
- F16M 11/10: around a horizontal axis {(F16M11/12 takes precedence)}
- F16M 11/105: {the horizontal axis being the roll axis, e.g. for creating a landscape-portrait rotation}
- F16M 2200/024: by positive interaction, e.g. male-female connections
- F16M 2200/08: Foot or support base
- F16M: FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS

## Abstract

An electronic device comprises a back cover and a support. The back cover defines a first contact area. The support is pivoted to the back cover by a pivot shaft, defines a second contact area contacting the first contact area. A plurality of positioning holes are defined in and disposed on the second contact area around the pivot shaft. The electronic device further comprises at least one retractable spring balls projected from the first contact area of the back cover. The spring balls are configured for cooperating with the positioning holes of the support. The support can stay at a variety of positions.

## Claims

### Claim 1

An electronic device comprising:
a back cover defining a first contact area;
a support pivoted to the back cover by a pivot shaft, wherein the support defines a second contact area contacting the first contact area, and a plurality of positioning holes are defined in and disposed on the second contact area around the pivot shaft; and
at least one retractable spring ball projected from the first contact area of the back cover, configured for cooperating with the positioning holes of the support;
wherein when the support rotates, the at least one retractable spring ball slides out of a corresponding one of the positioning holes, and when the support is at rest, the at least one retractable spring ball slides into a corresponding one of the positioning holes to maintain position of the support.

### Claim 2 (depends on 1)

The electronic device of claim 1, further comprising protrusions projected from the second contact area, and arc-shaped grooves defined in the first contact area for receiving the protrusions.

### Claim 3 (depends on 2)

The electronic device of claim 2, wherein the pivot shaft is a screw.

### Claim 4 (depends on 3)

The electronic device of claim 3, further comprising a nut engaging with the pivot shaft.

### Claim 5 (depends on 2)

The electronic device of claim 2, further comprising an overlay for fixing the spring balls on the back cover.

### Claim 6 (depends on 5)

The electronic device of claim 5, wherein the back cover comprises hooks for fixing the overlay.

### Claim 7 (depends on 2)

The electronic device of claim 2, wherein the support is an elongated plate bent at one end.

### Claim 8 (depends on 2)

The electronic device of claim 2, wherein the at least one retractable spring ball comprises two retractable spring balls.

### Claim 9 (depends on 1)

The electronic device of claim 1, wherein the pivot shaft is a screw.

### Claim 10 (depends on 9)

The electronic device of claim 9, further comprising a nut engaging with the pivot shaft.

### Claim 11 (depends on 1)

The electronic device of claim 1, further comprising an overlay for fixing the spring balls on the back cover.

### Claim 12 (depends on 11)

The electronic device of claim 11, wherein the back cover comprises hooks for fixing the overlay.

### Claim 13 (depends on 1)

The electronic device of claim 1, wherein the support is an elongated plate bent at one end.

### Claim 14 (depends on 1)

The electronic device of claim 1, wherein the at least one retractable spring ball comprises two retractable spring balls.