Automatically lockable cable rewinding structure

Abstract

An automatically lockable cable rewinding structure includes an upper case having a first locating element; a lower case provided with a limiting recess; and a working member located between the two cases, and provided with a second locating element and a guide path for a rolling element to move therein. A length of cable is wound around the working member, and an elastic element is connected at two ends to the first and second locating elements. The limiting recess is formed at radially inner and outer ends with transverse inner and outer slits, respectively, and between the inner and the outer end with a longitudinal central slit, so that the rolling element is able to stably roll to and fro in the limiting recess along the central slit. Alternatively, the limiting recess and the guide path may be provided on the working member and the lower case, respectively.

Description

FIELD OF THE INVENTION

[0001] The present invention relates to an automatically lockable cable rewinding structure, and more particularly to a cable rewinding structure that enables a cable wound therein to be smoothly pulled out and locked in place and smoothly rewound from a locked state simply by pulling and releasing the cable.BACKGROUND OF THE INVENTION

[0002] Taiwanese New Utility Model Patent No. 414413 published on Dec. 1, 2000 discloses a cable rewinding box, which includes an upper cover, a lower cover, a rotating base, a rotating disc, a constant force spring, and a fixing shaft. With the constant force spring, the cable pulled out of the rewinding case may be automatically rewound. Generally speaking, the constant force spring may provide a relatively stable contractile tension, and can therefore protects the cable against damage and shortened usable life caused by exceeded tension. Since the constant force spring and the rotating disc are provided at different axial locatio...

Images