Engaging structure for a drawer track

Abstract

The present invention discloses an engaging structure for a drawer track in which a ball seat adapted between a movable track and an intermediate track to render the movable track moving smoothly in the fixed track, wherein an appropriate position on the inner wall of the movable track is pivoted with a swinging piece whose two sides extends to form a retaining piece and a guide tenon, respectively; the side edges of the protruding portion on the front top end of the intermediate track extends to form a pair of front and rear stop pieces with slant faces, which are longitudinally resilient; a coupled structure includes a coupled piece slidably mounted on the front end to middle section of the bottom of the movable track and the coupled piece is fabricated to form a slant guide on its rear end to be adapted onto the guide tenon; such that when the movable track is being pulled from or being pushed into the intermediate track, the retaining piece will touch the slant face of one of the stop pieces, which is in turn being pressed downward to further push the swinging piece into the engaging space between the two stop pieces; alternatively, when an external force is pulling the coupled piece to drive the guide tenon to move the along slant guide and to render the retaining piece on the other end swinging so as to disengage from the engaged state.

1 . An engaging structure for a drawer track, in which a ball seat adapted between a movable track and an intermediate track to render the movable track moving smoothly in the fixed track, wherein 
 an appropriate position on the inner wall of the movable track is pivoted with a swinging piece whose two sides extends to form a retaining piece and a guide tenon, respectively;    the side edges of the protruding portion on the front top end of the intermediate track extends to form a pair of front and rear stop pieces with slant faces, which are longitudinally resilient;    a coupled structure includes a coupled piece slidably mounted on the front end to middle section of the bottom of the movable track and the coupled piece is fabricated to form a slant guide on its rear end to be adapted onto the guide tenon;    such that when the movable track is being pulled from or being pushed into the intermediate track, the retaining piece will touch the slant face of one of the stop pieces, which is in turn being pressed downward to further push the swinging piece into the engaging space between the two stop pieces; alternatively, when an external force is pulling the coupled piece to drive the guide tenon to move the along slant guide and to render the retaining piece on the other end swinging so as to disengage from the engaged state.    
   
   
       2 . The device as defined  claim 1 , wherein the intermediate track is adapted onto a fixed track and a ball seat is disposed therebetween.  
   
   
       3 . The device as defined  claim 1 , wherein the coupled piece is fabricated to form a front and rear slide guides and is rivetedly connected onto the movable track.  
   
   
       4 . The device as defined  claim 1 , wherein the coupled structure having a protection cover riveted onto the inner face of the movable track and a compression-extension spring adapted onto the spring tenon of the protection cover through its one end and adapted onto the spring retainer of the coupled structure through the other end.  
   
   
       5 . The device as defined  claim 1 , wherein the bottom of the coupled piece is at least disposed with a retaining button.  
   
   
       6 . The device as defined  claim 1 , wherein the slant edges of the protruding portion are fabricated to form a front and rear stop pieces, respectively, and an retaining piece is connected onto the front end opening of the intermediate track and which extend their respective stop slots, which are resilient longitudinally, and between which is disposed with at least a groove as their separation.  
   
   
       7 . The device as defined  claim 1 , further include a retaining structure for the ball seat, comprising 
 an intermediate track disposed with a protruding portion whose one side edge extends to form a pair of adjacent front stop and seat stop piece which have a slant face and which are longitudinally resilient;    a ball seat whose front edge corresponding to the seat stop piece is fabricated to form a retaining slot;    a movable track, which is disposed with a clasping piece at the appropriate position on its inner front end corresponding to the seat stop piece;    such that when the ball seat moves to the opening of the front end of the intermediate track, the retaining slot is engaged with the seat stop piece to retain the ball seat; also, when the clasping piece of the movable track moves to press the front stop and causes the seat stop piece to sink simultaneously, the retaining slot is disengaged from the engagement with the retaining tenon and is released from the engagement.    
   
   
       8 . The device as defined  claim 1 , wherein the rear bottom of the protruding portion of the intermediate track is axially mounted with an retaining swing piece which extends to form a connecting tenon from the front and to form a forked connection notch from the rear; and the intermediate track is fabricated to form a corresponding tenon hole and retaining slot for the protrusion of the connecting tenon and accommodation of the forked connection notch; the top of the fixed track corresponding to the retaining slot is disposed with a protruding block at an appropriate position; the intermediate track is being pushed inward and as it is moved to the position of the protruding block, its forked connection notch is engaged with the protruding block and the intermediate track cannot be moved further; when the intermediate track is being pushed inward to move to the protruding block, the forked connection notch is engaged with the protruding block and the intermediate track cannot be moved further; when the slant slot of the clasping piece touches the connecting tenon which is then guided into track, the forked connection notch of the retaining swing piece swings to disengage from the engagement of the protruding block, and then both the movable track and the intermediate track move to the rear of the fixed track.