Abstract:
The present invention relates to an improved structure of switch box and particularly to a structure composed of such members as a box body, an assembly plate, a sleeving frame and a panel, wherein the box body will not be deformed in the process of grouting so that the panel can be easily installed on the box body and adjustable in line with the position of building wall surface, the panel and the building wall surface are on the same one plane, and the purposes of convenience, safety and practicability can be achieved.

Description:
BACKGROUND OF THE INVENTION 
     Each building is in need of a switch box so as to achieve the purposes of safety on the one hand and enhancing beauty in keeping with the building on the other hand. Therefore, the switch box is a prerequisite necessity of building material. The conventional switch box may be divided into types, namely, exposed and embedded, for the optional choice by the contractors, but these two types cannot be replaced with each other and the embedded type has the following drawbacks: 
     1. Those portions around the screw holes on the conventional structure which are exposed tend to be blocked by cement during grouting which deforms the switch box. After the building structure is finished, the screw holes on the box panel can not be correctly aligned with the screw hole on the box body, leading to an inconvenient assembly. 
     2. The fixed conventional box body and panel structure cannot be in keeping with a wall surface which has been painted or tiled, in other words, the panel surface and the wall surface are not on the same one plane, so the beauty of wall surface is spoilt. 
     3. The conventional structure is not provided with any covering plate, so the binding terminal is exposed. In case of closing the box door, a rat may gnaw and break the electric wire insulation and die of electric shock when it contacts the said wire which will lead to burning. In addition, when opening the said door, the operator may also contact the electric wire, so its safety is very poor. 
     An object of this invention is to offer an improved structure of switch box which will not be deformed during grouting and can achieve the purpose of convenient practice when assembling the panel. 
     Another object of this invention is to offer an improved structure of switch box with a position adjustable panel so that the panel surface and the wall surface are on the same plane to enhance the beauty and practicability of these surfaces. Still another object of this invention is to offer an improved structure of switch box with a high-degree of safety. 
     SUMMARY OF THE INVENTION 
     The present invention relates to an improved structure of switch box wherein the assembly plate is fixed on the bolt on the inner wall of box body with the nut; the sleeving frame is fixed on the L-rack of assembly plate with the screw; and the panel is screwed together with the frame plate of frame body and the side plate of sleeving frame, so that the panel and the box body are assembled with each other to aviod the box body from being deformed or the screw hole from being block during grouting which will cause the impossible alignment with the screw holes on the panel, the inconvenient installation and assembly, the panel and the wall surface not on the same one plane, and the prohibitive spoilage of appearance and beauty, but the special purposes of convenience, practicability, safety and beauty can be achieved. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is an exploded perspective view of components of this invention. 
     FIG. 2 is a rear elevational view of the box body of this invention. 
     FIG. 3 is a section view of this invention. 
     FIG. 4 is a sectional view of an assembled box embedded in a wall. 
     FIG. 5 is a view similar to FIG. 4 showing a modification. 
     FIG. 6 is a view similar to FIG. 4 showing a surface-mounted box. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     As shown in FIGS. 1 to 3, a bolt (111),(112),(113),(114) is in each corner on the front of inner wall (11) of box body (1), a catch (125) and a ladder-shaped H-frame (12) are on the back thereof; a hole (121), (122) is at each upper end of H-frame (12), a recess (123), (124) is at the lower end thereof; an L-rack or bracket (21),(22), (23),(24) is to align with the hole (311),(312),(313),(314) on the frame plate (31) of sleeving or mounting frame (3), a hole (25),(26),(27), (28) is nearby the L-rack (21),(22),(23),(24) to align with the bolt (111),(112),(113),(114) on the inner wall (11) of box body (1); a hole (331),(312),(313),(314) is in each corner on the frame plate (31) of sleeving frame (3), a slot (315) is on the frame plate (31) in keeping with the position of switch seat on the assembly plate (2), three holes (321),(322),(323);(331),(332),(333) are respectively around the front edge of two side plates (32),(33) to align with the slots (4321),(4322),(4333),(4311),(4312),(4313) on the frame plates (431),(432) of frame body (43) of panel (4); a door frame (41) on the panel (4) is to receive the door plate (42) which is to be inserted in the groove (411), a frame body (43) is extended from the door frame (41) to be just placed in the sleeving frame (3), and these two frame plates (431),(432) have the slots (4311),(4312),(4313);(4321),(4322),(4323) respectively. 
     When assembling the box, sleeve the holes (25), (26),(27),(28) on the assembly plate (2) onto the bolts (111),(112),(113),(114) on the inner wall (11) of box body (1) so as to fix the assembly plate (2) onto the inner wall (11) of box body (1) through screwing the nuts, then align with the screw holes (211),(221),(231), (241) on the L-racks (21),(22),(23),(24) of assembly plate (2) so as to lock the assembly plate (2) and the sleeving frame (3) together with screws; the switch seat on the assembly plate (2) is exposed through the slot (315), the binding terminal is hidden behind the frame plate (31) to enhance the safety; then to insert the frame body (43) of panel (4) in the sleeving frame (3) so as to align the slots (4311),(4312),(4313);(4321),(4322),(4323) on these two frame plates (431),(432) with the holes (331),(332), (333);(321),(322),(323) on the side plates (32),(33) of sleeving frame (3) respectively and to lock the panel (4) and the sleeving frame (3) together through screws, an integral structure of this invention is well assembled. 
     When in use, provided it is an embedded type, as shown in FIG. 4 to place the box body (1) in the predetermined position on the unfinished building structure, to tightly tie the H-frame (12) onto the steel bar to be fixed by grouting. If the thickness of wall wherein this invention is to be embedded is too thin, a wire netting (5) can be fixed onto the back of box body (1) through the catch (125) so as to step up the adhesive force of cement as shown in FIG. 5. Since the bolts (111),(112),(113),(114) are on the inner wall (11) of box body (1), the cement during grouting will not splash onto them, and the H-frame (12) preset behind the inner wall (11) can enhance the structural strength of inner wall (11) which will not be deformed. After the building structure is finished, the integral structure of this invention is to be completed in line with the foregoing process wherein if the wall surface of building is thicker because of painting or tiling, the screws of various slots (4311),(4312),(4313);(4321),(4322),(4323) and holes (331), (332),(333);(321),(322),(323) may be loosened so as to pull out the frame body (43) for adjustment until the surfaces of both the panel (4) and the building wall are on the same one plane, then to screw back the screws thereof. 
     If this invention is to be used as an exposed type, as shown in FIG. 6, all to do is to hang the two recesses (123), (124) on the H-frame (12) of box body (1) onto two screws fixed on the predetermined position of installing the switch box on the building structure, the box body (1) is fixed onto the building wall with two screws passing through the holes (121),(122), then the integral structure of this invention can be finished in line with the foregoing process.