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.

1 . An automatically lockable cable rewinding structure, comprising an upper case, a working member, and a lower case; the upper case being provided on an inner side with an axially inward extended first locating element; the working member being provided at a predetermined position with a second locating element, and on a bottom with a guide path for a rolling element to move therein; a length of cable being wound around an outer periphery of the working member, and a first elastic element being connected at an inner end to the first locating element on the upper case and at an outer end to the second locating element on the working member; and the lower case being provided on a bottom at a predetermined position with a radially extended limiting recess, which 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. 
     
     
         2 . The automatically lockable cable rewinding structure as claimed in  claim 1 , wherein the guide path is divided into a locking section, an inner path section, an outer path section, and a plurality of transition sections located at predetermined positions between the inner and the outer path section; and the locking section being located adjacent to a beginning of the inner path section. 
     
     
         3 . The automatically lockable cable rewinding structure as claimed in  claim 1 , wherein the cable is wound around the working member in such a manner that the cable may be pulled out of the closed upper and lower cases in two opposite directions. 
     
     
         4 . The automatically lockable cable rewinding structure as claimed in  claim 1 , wherein the cable is wound around the working member in such a manner that the cable may be pulled out of the closed upper and lower cases in only one direction. 
     
     
         5 . An automatically lockable cable rewinding structure, comprising an upper case, a working member, and a lower case; the upper case being provided on an inner side with an axially inward extended first locating element; the lower case being provided on an inner side with a guide path for a rolling element to move therein; and the working member being provided at a predetermined position with a second locating element, and on a bottom at a predetermined position with a radially extended limiting recess; a length of cable being wound around an outer periphery of the working member, and a first elastic element being connected at an inner end to the first locating element on the upper case and at an outer end to the second locating element on the working member; and the limiting recess being 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. 
     
     
         6 . The automatically lockable cable rewinding structure as claimed in  claim 5 , wherein the guide path is divided into a locking section, an inner path section, an outer path section, and a plurality of transition sections located at predetermined position between the inner and the outer path section; and the locking section being located adjacent to a beginning of the inner path section. 
     
     
         7 . The automatically lockable cable rewinding structure as claimed in  claim 5 , wherein the cable is wound around the working member in such a manner that the cable may be pulled out of the closed upper and lower cases in two opposite directions. 
     
     
         8 . The automatically lockable cable rewinding structure as claimed in  claim 5 , wherein the cable is wound around the working member in such a manner that the cable may be pulled out of the closed upper and lower cases in only one direction.