# US 2025/0084666 A1 · Small volume door lock panel

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- Number: US 2025/0084666 A1
- Document ID: US20250084666A1
- Status: Published application
- Kind: A1
- Application number: 18/484,642
- Filed: 2023-10-11
- Published: 2025-03-13
- Earliest claimed: 2023-09-12
- Assignees: Zhejiang Chaodai Hardware Co., Ltd.
- Applicants: Zhejiang Chaodai Hardware Co., Ltd.
- Inventors: Qiang HUANG
- Web page: https://patentgrep.com/patent/US20250084666A1

## CPC

- E05B 9/002: {Faceplates or front plates (E05C9/004 takes precedence)}
- E05B 3/065: {with spring biasing means for moving the handle over a substantial distance, e.g. to its horizontal position}
- E05B 9/08: Fastening {locks or fasteners or parts thereof, e.g.} the casings of latch-bolt locks or cylinder locks to the wing {(on glass wings E05B65/0025)}
- E05B 15/04: Spring arrangements in locks {(E05B3/065, E05B15/101, E05B15/143, E05C19/06 take precedence)}
- E05B 2015/0406: {wound in a cylindrical shape}
- E05B: LOCKS; ACCESSORIES THEREFOR; HANDCUFFS

## Abstract

A small volume door lock panel includes a panel mounting seat provided with a mounting cavity on one side, and a torsion head provided in the mounting cavity. A fixing member is provided in the mounting cavity. A mounting hole for clamping engagement with a mounting tool is formed in the fixing member. One end of the fixing member is provided with a connection part for connecting and fixing. A safety hole coaxial with and in communication with the mounting hole is formed on the panel mounting seat, a return spring for connecting is provided between the mounting cavity and the torsion head, ends of the return spring are both clamped into the mounting cavity, the torsion head is provided with control parts of a compression spring, and the mounting cavity is provided with a fixed blocking piece which limits the torsion head, the return spring, and the fixing member.

## Claims

### Claim 1

A small volume door lock panel, comprising a panel mounting seat provided with a mounting cavity on one side, and a torsion head provided in the mounting cavity, wherein
a fixing member is provided in the mounting cavity, a mounting hole for clamping engagement with a mounting tool is formed in the fixing member, and one end of the fixing member is provided with a connection part for connecting and fixing; and
a safety hole coaxial with and in communication with the mounting hole is formed on the panel mounting seat, a return spring for connecting is provided between the mounting cavity and the torsion head, ends of the return spring are both clamped into the mounting cavity, the torsion head is provided with control parts of a compression spring, and the mounting cavity is provided with a fixed blocking piece which limits the torsion head, the return spring, and the fixing member.

### Claim 2 (depends on 1)

The small volume door lock panel according to claim 1, wherein an indexing portion for guiding the rotation of the torsion head is provided in the mounting cavity, a plurality of spring limiting portions protrude from the indexing portion, both ends of the return spring are provided with a clamping end clamped in the spring limiting portion; the torsion head is provided with a plurality of control parts for pressing the clamping ends, and a square hole for clamping a square core of a door lock is formed in the center of the torsion head.

### Claim 3 (depends on 1)

The small volume door lock panel according to claim 1, wherein the compression spring is located between the fixing member and the panel mounting seat.

### Claim 4 (depends on 1)

The small volume door lock panel according to claim 1, wherein the connection part is connection threads.

### Claim 5 (depends on 1)

The small volume door lock panel according to claim 1, wherein a clamping hole for mounting a mounting member is formed on the fixed blocking piece.

### Claim 6 (depends on 1)

The small volume door lock panel according to claim 1, wherein the mounting cavity is provided with a plurality of locking screws for fixing the mounting seat.

### Claim 7 (depends on 1)

The small volume door lock panel according to claim 1, wherein the mounting hole is a hexagonal hole.