Abstract:
A coupling structure for mobile video device provided with multiple output signal terminals and a pair of commensurable multi-terminal jacks for easy and rapid installation or maintenance, and with a multistage adjustment device for adjusting the mobile video device in multiple steps.

Description:
BACKGROUND OF THE INVENTION 
     This invention relates to a coupling structure for mobile video device, particularly to a coupling structure for mobile video device provided with multiple output terminals and a commensurable multi-terminal jack for easy installation and maintenance and a multistage adjustment device for multistage adjustment. 
     Subsequent to the soaring popularity of the personal mobile video device, convenience of maintenance job is considered more important than ever, however, as the wiring in a conventional mobile video device is usually coupled in way of point or cup joint, it would be rather troublesome to open the seat for wire-cutting and wire-connecting when maintaining. 
     In a coupling structure for the conventional mobile video device shown in FIG. 1, a video device C is disposed in a pillow A, wherein a plurality of signal transmission lines C 1  penetrates through a branch pipe A 1  of the video device C, then is sleeve-jointed with an adopter C 2  which is coupled to a signal transmission line D extended out of a seat B; and another branch pipe A 1  is swiveled to lock on a pipe end A 2 . 
     In view of abovesaid imperfection in maintenance, after years of constant effort in research, the inventor of this invention has consequently developed and proposed an improved coupling structure pertaining to the subject matter. 
     SUMMARY OF THE INVENTION 
     This invention is proposed to provide a coupling structure for mobile video device with multiple output terminals and a commensurable multi-terminal jack for easy installation and maintenance and a multistage adjustment device for multistage adjustment. 
     For a better understanding to the present invention, together with further advantages or features thereof, at least one preferred embodiment will be elucidated below with reference to the annexed drawings. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a schematic coupling structure for a conventional mobile video device. 
     FIG. 2 is a schematic coupling structure for a mobile video device of this invention. 
     FIG. 3A is a schematic view showing a structure of signal terminal (1) of this invention. 
     FIG. 3B is a schematic view showing a structure of signal terminal (2) of this invention. 
     FIG. 3C is a schematic view showing a structure of signal terminal (3) of this invention. 
     FIG. 4A is a schematic view showing another structure of signal terminal (1) of this invention. 
     FIG. 4B is a schematic view showing another structure of signal terminal (2) of this invention. 
     FIG. 4C is a schematic view showing another structure of signal terminal (3) of this invention. 
     FIG. 4D is a schematic bottom view of another signal terminal of this invention. 
     FIG. 5A is a schematic view showing a signal terminal being coupled with a terminal jack (1) of this invention. 
     FIG. 5B is a schematic view showing a signal terminal being coupled with a terminal jack (2) of this invention. 
     FIG. 6 is a schematic view of an adjustment device of this invention. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     As shown in FIG. 2, a mobile video device  3  is included in a pillow  1 , wherein a signal transmission line  31  penetrated through a branch pipe  11  is coupled with a signal terminal  32  located at one end of the branch pipe  11 . A pair of the branch pipes  11  of the pillow  1  is plugged in two insertion holes  21  of a seat portion  2  and snap-fastened to a pair of terminal jacks  41  of an adjustment device  4 . The mobile video device  3  is movable up and down along a pair of displacement rails  43  in virtue of a displacement block  42 . At an upper and a lower end of the adjustment device  4 , an upper and a lower stopper  44 ,  45  are disposed respectively for easy dismounting or mounting of the mobile video device  3 . And, an exit hole  416  is perforated at a bottom end of the terminal jack  41  for extending a signal transmission line  46 . 
     Referring to FIG.  3 A through FIG.  3 C and FIG.  4 A through FIG. 4D, a plurality of signal contact points  321  is offered to each of the signal terminals  32  according to requirement of the increasing functions of the mobile video device  3 . The signal terminal  32  is lengthened in a multi-layer structure for accommodating the contact points  321 , which may be aligned horizontally or staggeringly, and a plurality of receptacles or slots  322  is also arranged in the signal terminal  32 . A positioning groove  323  is formed in the signal terminal  32 , and a positioning piece  111  is disposed on the branch pipes  11  to facilitate wiring of the signal terminal  32  correctly and prevent the signal terminal  32  from causing a short circuit because of improper swiveling, and one or two sets of the signal terminal  32  may be arranged depending on functions provided by the mobile video device  3 . 
     As shown in FIGS. 5A and 5B, a plurality of storage receptacles  412  is formed in the inner wall of the terminal jack  41 , wherein an elastomer  413  and a steel bead  414  are buried in the storage receptacle  412  in sequence. A plurality of positioning dimples  322  is formed on the signal terminal  32  at positions corresponding with the storage receptacles  412  of the terminal jack  41 . Therefore, the steel bead  414  of the terminal jack  41  is pushed by the elastomer  413  into the positioning dimple  322  of the signal terminal  32  when the terminal  32  is plugged to joint with the terminal jack  41 , and thereby a short circuit owing to improper swivel of the signal terminal  32  can be avoided. At this moment, the signal contact point  321  of the signal terminal  32  is in conductive contact with a signal contact point  411  of the terminal jack  41 . 
     In another way of coupling the signal terminal  32  with the terminal jack  41 , a plurality of elastic pieces  415  is disposed in the inner wall of the terminal jack  41  and a plurality of positioning dimples  322  on the signal terminal  32  at positions corresponding with the elastic pieces  415 . Hence, the elastic piece  415  is snap-retained in the positioning dimple  322  when the signal terminal  32  is plugged to joint with the terminal jack  41 . At this moment, the signal contact point  321  of the signal terminal  32  is in conductive contact with the signal contact point  411  of the terminal jack  41 . 
     In FIG. 6, after the signal terminals  32  have been snap-retained in the terminal jacks  41  of the adjustment device  4 , the mobile video device  3  is movable up and down along the displacement rails  43  by virtue of the displacement block  42 . As abovesaid, at the upper and the lower end of the adjustment device  4 , the upper and the lower stopper  44 ,  45  are disposed respectively for easy dismounting or mounting of the mobile video device  3 , and the exit hole  416  is perforated at the bottom end of the terminal jack  41  for extending the signal transmission line  46 . Further, a plurality of positioning dimples  421  is disposed at two lateral lines properly in the displacement block  42  while a plurality of storage receptacles  431  is formed in those two displacement rails  43 , wherein an elastomer  432  and a steel bead  433  are buried in each storage receptacle  431  sequentially. Hence, the height of the pillow  1  of the mobile video device can be adjusted as desired. 
     In short, this invention is proposed to provide a coupling structure that is more advantageous for installing and maintaining a mobile video device, and an additional multistage that is convenient for adjusting height of the pillow of the mobile video device. 
     In the above described, at least one preferred embodiment has been elucidated with reference to drawings annexed, it is apparent that numerous variations or modifications may be made without departing from the true spirit and scope thereof, as set forth in the following claims.