# US 10,308,475 B2 · Switching mechanism for traction device

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- Number: US 10,308,475 B2
- Document ID: US10308475B2
- Status: Granted
- Kind: B2
- Application number: 15/641,333
- Filed: 2017-07-05
- Published: 2017-10-19
- Granted: 2019-06-04
- Earliest claimed: 2017-06-14
- Applicants: Fuyou Shi
- Inventors: Fuyou Shi
- Web page: https://patentgrep.com/patent/US10308475B2

## CPC

- B65H 75/4431: {Manual stop or release button}
- A01K 27/004: {Retractable leashes}
- B65H 2701/35: Ropes, lines
- B65H: HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- A01K: ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS

## Abstract

A switching mechanism for traction device is provided, including: a push-pull button 1, a push-pull button decoration ring 2, a switching button 3, a reset spring 4, a right shell 5, a reel 6 and a left shell 7; wherein the push-pull button decoration ring 2 is sleeved on the push-pull button 1, in such a manner that the push-pull button 1 is fitted with a cambered surface of the left shell 7 and a cambered surface of the right shell 5; the switching button 3 is sleeved in the push-pull button 1; the push-pull button 1, the push-pull button decoration ring 2 and the switching button 3 form an integrated unit and are provided on the right shell 5 and the left shell 7. Sealing treatment is performed, in such a manner that deep hole directly entering internal part of the products is prevented.

## Claims

### Claim 1

A switching mechanism for a traction device, comprising: a push-pull button (1), a push-pull button decoration ring (2), a switching button (3), a reset spring (4), a right shell (5), a reel (6) and a left shell (7); wherein the push-pull button decoration ring (2) is sleeved on the push-pull button (1), in such a manner that the push-pull button (1) is fitted with a cambered surface of the left shell (7) and a cambered surface of the right shell (5); the switching button (3) is sleeved in the push-pull button (1); the push-pull button (1), the push-pull button decoration ring (2) and the switching button (3) form an integrated unit and are provided on the right shell (5) and the left shell (7); the reel (6) is provided on a central shaft of the right shell (5); the reset spring (4) is provided in the switching button (3); a guide rib (9) is provided on the push-pull button (1) for being received in a guide grove (10) of the left shell (7) and the right shell (5); wherein when the switching button (3) is pressed and the push-pull button (1) is pulled backward, a limit platform (14) provided on the push-pull button (1) blocks a lock hook on the switching button (3), so as achieve a complete locking.

### Claim 2 (depends on 1)

The switching mechanism for the traction device, as recited in claim 1, wherein a damping sheet (13) is provided on the push-pull button (1).

### Claim 3 (depends on 1)

The switching mechanism for the traction device, as recited in claim 1, wherein a damping groove (12) is provided on the right shell (5).

### Claim 4 (depends on 1)

The switching mechanism for the traction device, as recited in claim 1, wherein a wire-out opening (8) is provided on the right shell (5) and the left shell (7).

### Claim 5 (depends on 1)

The switching mechanism for the traction device, as recited in claim 1, further comprising a switching limit post (11) provided on the switching button (3), so as to limit the switching button (3).