Patent ID: 11864533
Assignee: nan
Field: Other special machines (Mechanical engineering)
Classification: CPC A | IPC A

Claim 0:
1. An automatically regulated leash for domestic animals that comprises:
a ring-shaped hollow body with a handle,
a winding roll containing a cord mounted on guides on the hollow body,
a free end of the cord outwardly withdrawn through an opening in the hollow body;
a stop mechanism for the cord regulated by a button located on the hollow body;
wherein the cord has a length of 2.5 to 3.5 meters, and is configured to be wound on the winding roll mounted on guides in the body,
wherein the winding roll comprises, on an inner cylindrical surface, teeth that are internally engaged with a toothed drum mounted on a shaft fixedly attached in a cavity of the handle and made as an elongated protrusion with an elliptical shape in cross-section and is made integral with the body,
wherein inside the toothed drum a spiral band spring is mounted made of a high-carbon alloyed steel having a Mn content of not more than 1.2%, which has a free end fixed on the shaft
and another end fixed on a lateral inner wall of the toothed drum,
and having an operational stroke range along a diameter thereof from 4 to 15 mm,
a width of the spiral band spring within 12±5 mm,
a length of the spiral band spring in a deployed state within 2500±800 mm,
a thickness of the spiral band spring within 0.1±0.03 mm,
and wherein a diameter of the toothed drum is 0.25-0.40 a diameter of the teeth of the winding roll.