CONTROL DEVICE FOR CORDLESS BLIND WITH WILLFUL STOP

摘要

Disclose is a control device for liberally stopping a cordless blind, comprising a force-return mechanism, a shaft connector, and a braking buffer mechanism to allow lifting/lowering or open/close operation of the cordless blind to be stopped at any position according to user's requirements. The force-return mechanism includes a base, a force-return wheel installed inside the base, and an elastic element. The shaft connector and the braking buffer mechanism are installed in a housing. And the shaft connector has a trigger and a brake. The shaft connector has an inserting hole exposed from the housing. The braking buffer mechanism includes a friction ring and an impeding spring. The impeding spring is tightly inserted into a wear-proof annular inwall of the friction ring and has an extrusion to impede the rotation of the shaft connector.

主权项

1. A control device for a cordless blind with a willful stop, comprising:
a force-return mechanism including a base, a force-return wheel installed inside the base, and an elastic element, wherein one end of the elastic element is connected to the force-return wheel to provide a retracting elastic force for the force-return wheel; a shaft connector installed inside a housing, the shaft connector having a trigger and a brake, wherein one end of the shaft connector has an inserting hole exposed from the housing; and a braking buffer mechanism installed inside the housing and including a friction ring and an impeding spring, wherein the friction ring is immovably fixed inside the housing with a wear-proof annular inwall, and the impeding spring is tightly inserted into the wear-proof annular inwall with an extrusion to prevent the rotation of the shaft connector; wherein an axial hole of the force-return wheel is aligned with the inserting hole when the housing is jointed to the base to accommodate the shaft connector and the braking buffer mechanism in the housing; wherein the brake is in contact with the extrusion of the impeding spring with an original friction force formed between the impeding spring and the friction ring when the cordless blind is stopped; wherein the trigger is in contact with the extrusion of the impeding spring to reduce the original friction force formed between the impeding spring and the friction ring when the cordless blind is active.