Abstract:
An aluminum extrusion external framework of LCD monitor primarily comprises a front frame cap, a back frame cap, and a sheathing, which are assembled with one another. Several movable laminas are mounted on the inside of the back frame cap, wherein the locking positions of the movable laminas are adjustable. The aluminum extrusion external framework of the LCD monitor is made of aluminum for lightening its weight and conforming to the recycle-based environmental protection so as to facilitate the heat sinking, reduce the production cost, and increase the product lifetime. Besides, the movable laminas are applied to the raised slideways around the inside of the back frame cap so as to be universally suitable for the existing LCD panel having various specifications and dimensions.

Description:
FIELD OF THE INVENTION  
       [0001]     The present invention relates to an external framework for use in a thin film transistor liquid crystal display (TFT-LCD) monitor.  
       BACKGROUND OF THE INVENTION  
       [0002]     The existing external framework for use in the LCD monitors is made of resin by injection-molding method directly. The recycling process of the injection-molded rein creates toxic chemical materials. Moreover, it cannot be decomposed effectively after being buried directly. It causes a lots of environmental protection issues. Moreover, for this external framework of TFT-LCD monitor, which is made of resin, a metal partition is usually applied to isolate the electromagnetic wave for reducing the radiation. However, this metal partition is composed of iron, and the resin external framework also increases the integral weight. Besides, the large-sized (over 32 inches) LCD monitor easily suffers from the problem of heat sinking.  
         [0003]     The existing aluminum external framework for use in the TFT-LCD monitor is formed generally by casting method or aluminum extrusion method. Because the casting method results in high mold cost and the vertical ribs influence the drawing of pattern, the casting method cannot form the ribs that vertically isolate the electromagnetic wave by a single molding process. Consequently, only the aluminum extrusion method with lower mold cost conforms to economic benefit of manufacture.  
         [0004]     Moreover, the LCD panel is securely locked by nails, which are mounted on the inside of the existing external framework. Since the locking positions of different LCD panels, which are manufactured by various manufacturers, are not standardized, various complicated processes must be introduced to the assembling operation. Therefore, a specific external framework is only suitable for the corresponding LCD panel. Consequently, the purpose of universal use is not achieved.  
       SUMMARY OF THE INVENTION  
       [0005]     The main object of the present invention is to provide an aluminum extrusion external framework of a LCD monitor, wherein the front frame cap comprises: two long rims and two short rims connected with one another; a right-angled plate securely inserted into each vertical trench; and a plane plate securely inserted into each parallel trench such that the front frame cap is provided with flatness and right-angled form.  
         [0006]     Another object of the present invention is to provide an aluminum extrusion external framework of a LCD monitor, in which several movable laminas with adjustable locking positions are mounted on the inside of the back frame cap to be universally suitable for the existing LCD panels having various specifications and dimensions for facilitating marketing and promoting competitiveness.  
         [0007]     The still another object of the present invention is to provide an aluminum extrusion external framework of a LCD monitor, in which a trench and a plurality of movable plates are mounted inside the backside of the back frame cap. Two screw holes are formed on the movable plate, wherein one screw hole is applied to fix the PCB, and the other screw hole is applied to fix the movable plate.  
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0008]      FIG. 1  is a schematic view showing the structure of the present invention.  
         [0009]      FIG. 2  is a schematic, exploded view showing the structure of the present invention.  
         [0010]      FIG. 3  is a schematic, exploded view showing the components of the front frame cap of the present invention.  
         [0011]      FIG. 4  is a first schematic view showing the assembling relationship between the right-angled plate and the plane plate of the front frame cap of the present invention.  
         [0012]      FIG. 5  is a second schematic view showing the assembling relationship between the right-angled plate and the plane plate of the front frame cap of the present invention.  
         [0013]      FIG. 6  is a third schematic view showing the assembling relationship between the right-angled plate and the plane plate of the front frame cap of the present invention.  
         [0014]      FIG. 7  is a schematic rear view showing the assembled front frame cap of the present invention.  
         [0015]      FIG. 8  is a schematic view showing that the movable laminas are assembled to the back frame cap to be mounted on the LCD panel in accordance with the present invention.  
         [0016]      FIG. 9  is a schematic view showing that the LCD panel is assembled to the back frame cap in accordance with the present invention.  
         [0017]      FIG. 10  is a schematic view showing that the LCD panel is assembled to the back frame cap from the lateral side in accordance with the present invention.  
         [0018]      FIG. 11  is a schematic view showing that the LCD panel and the front frame are assembled to the back frame cap in accordance with the present invention.  
         [0019]      FIG. 12  is a schematic view showing the brackets for use in the external framework of the present invention.  
         [0020]      FIG. 13  is a schematic view showing that the speaker frames are mounted on both sides of the external framework in accordance with the present invention.  
         [0021]      FIG. 14  is a schematic view showing the relationship between the speaker nets and the speaker frames, which are mounted on both sides of the external framework, in accordance with the present invention.  
         [0022]      FIG. 15  is a schematic view showing the operation of assembling the speaker nets to the speaker frames in accordance with the present invention.  
         [0023]      FIG. 16  is a schematic view showing that the PCB is mounted on the backside of the back frame cap in accordance with the present invention.  
         [0024]      FIG. 17  is an elevational, partial enlarged view showing the assemblage of the X-axial, Y-axial slideways and the movable laminas in accordance with the present invention. 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT  
       [0025]     Referring to  FIG. 1 ,  FIG. 2 , and  FIG. 9 , an aluminum extrusion external framework for use in a LCD monitor of the present invention comprises an aluminum extrusion front frame cap  1 , an aluminum extrusion back frame cap  2 , and an aluminum extrusion sheathing  3 , which are assembled with one another. Several movable laminas  4  are mounted on the inside of the back frame cap  2 , wherein the locking positions of the movable laminas  4  are adjustable. The aluminum extrusion external framework further comprises several side frames  9  and several front frames  10 , which can be securely connected to the movable laminas  4 .  
         [0026]     As shown in  FIG. 2  and  FIG. 3 , the front frame cap  1  is composed of two aluminum extrusion long rims  11  and two aluminum extrusion short rims  12 , which are connected and matched with one another in pairs. During the molding process, vertical trenches  111 ,  121  and parallel trenches  112 ,  122  are formed on the backsides of the vertical surfaces of the aluminum extrusion long rims  11  and the aluminum extrusion short rims  12 . As shown in  FIG. 4  and  FIG. 5 , a right-angled plate  13  is inserted into the right-angled abutting portion between the vertical trenches  111 ,  121 , and a plane plate  14  is inserted into the right-angled abutting portion between the parallel trenches  112 ,  122 . Besides, screws are applied to securely fix the right-angled plate  13  and the plane plate  14  to their corresponding trenches, as shown in  FIG. 6 . As shown in  FIG. 7 , two long rims  11  and two short rims  12  are mutually assembled to form the front frame cap  1 , wherein the right-angled plate  13  is applied to provide the tightness for two connected rims, and the plane plate  14  is applied to provide the flatness for two connected rims so as to form a flat, tight assembled front frame cap  1  and prevent the abutting portions of the front frame cap  1  from the occurrence of unevenness and gaps. As shown in  FIG. 7 , the recessed surfaces  15 , which are surrounded by two ribs  17 , are formed on the connection surfaces  16 , which are surrounded by the long rims  11  and the short rims  12 .  
         [0027]     As shown in  FIG. 2  and  FIG. 9 , the back frame cap  2  is composed of two aluminum extrusion long rims  21  and two aluminum extrusion short rims  22 , which are connected with one another in pairs by cutting their corresponding ends in 45 degrees to form bevel edges. Besides, plate-receiving trenches  26 , which are formed on the abutting surfaces of the rims  21 ,  22 , are constituted by raised slideways  23 ,  24 . The recessed trenches  25  are formed by processing the raised slideways  23  to enable the movable laminas  4  to slide in the recessed trenches  25 . Besides, several orientation holes  231  are formed on the raised slideways  23  to penetrate them.  
         [0028]     Several screw holes  41  are formed on the movable laminas  4  by vertically pre-drilling the surfaces of the movable laminas  4  in unequal distances. Several screw holes  42  are formed by drilling the movable laminas  4  in positions corresponding to the raised slideways  23 . The side frames  9  or the front frames  10  can be securely connected to the screw holes  41 . Several connection holes  921 ,  102  are formed corresponding to the front locking holes  51  and the side locking holes  61  of the LCD panel  5  by processing the side frames  9  and the front frames  10  so as to fixedly assemble the LCD panel  5  to the back frame cap  2  by inserting the screws into them.  
         [0029]     The screw holes  41 ,  42  of the movable laminas  4  and the connection holes  921  of the side frames  9  or the connection holes  102  of the front frames  10  can be pre-drilled to have positions and numbers corresponding with that of the front locking holes  51  or the side locking holes  61  of the LCD panel  5  provided by various manufacturers. In other words, the corresponding positions and numbers of the holes can be adjusted in accordance with the change in specifications and dimensions of the existing LCD panels  5 .  
         [0030]     Referring to  FIG. 8 , the numbers and corresponding positions of the exposed screw holes  41  of the movable laminas  4  are shown, wherein the movable laminas  4  are inserted into the plate-receiving trenches  26 . The positions of the screw holes  42  are designed to aim at the orientation holes  231  of the raised slideways  23 . Accordingly, the screw holes  42  are formed to correspond with the orientation holes  231  such that the screws can be screwed thereon to immovably fix the movable laminas  4  in the plate-receiving trenches  26  of the back frame cap  2 .  
         [0031]     Several holes can be formed on the raised slideways  23  for fixing the movable laminas  4  such that the movable laminas  4  can be shifted in accordance with the positions of the locking holes of the LCD panel  5 . When the movable laminas  4  and the metal side frames  9  or the front frames  10  are shifted to the proper positions, which is suitable for the LCD panel  5 , the screws are inserted into the orientation holes  23   1  and the screw holes  42  to fix the movable laminas  4 . When the LCD panel  5  is fixed to the back frame cap  2 , the positions of the screw holes of metal side frame  9  and front frame  10  can be changed in accordance with the fixed positions of the holes of the LCD panel  5 , as shown in  FIG. 9 .  
         [0032]     As shown in  FIG. 9  and  FIG. 10 , if the side fixing holes  52  on the up/down sides or the right/left sides of the LCD panel, but not on its front side, are applied to fix the LCD panel  5 , then the right-angled metal side frames  9  are applied to fix the LCD panel  5 . Several connection holes  921  are formed on the horizontal surfaces of the side frames  9 . Because the fixed holes of the LCD panels, which are manufactured by various manufacturers, are provided with different dimensions and positions, these connection holes  921  are applicable to the fixed holes of these LCD panels. Furthermore, several locking holes  911  are formed on the side connection plate  91  of the side frame  9  corresponding to the screw holes  41  of the movable laminas  4 .  
         [0033]     In accordance with the above description, it is apparent that each of top, bottom, left, and right plate-receiving trenches  26  comprises the movable lamina  4  and the metal side frame  9  or the front frame  10  to match the front locking holes  51  or the side locking holes  52  of the LCD panel  5 . Accordingly, the back frame cap  2  with the standardized specification is suitable to various LCD panels  5 , which are manufactured by various manufacturers.  
         [0034]     When the back frame cap  2  is assembled to the LCD panel  5 , the front surface of the back frame cap  2  is inserted into the front frame cap  1  and fixed thereon so as to achieve the purpose of covering the LCD panel  5 . Referring to  FIG. 8 , the rectangular raised slideways  23  and ribs, which are formed on the abutting surfaces of the back frame cap  2 , can be exactly inserted onto the recessed surfaces  15  of the front frame cap  1  such that the electromagnetic wave, which is emitted from the LCD panel  5 , is quarantined by the recessed surfaces  15 , which are formed on the backside of the front frame cap  1 , and the ribs, which are formed on the front side of the back frame cap  2 , for reducing radiation influence on their outside to fulfill the need to avoid electromagnetic interference (EMI). Besides, as shown in  FIG. 7 , the back frame cap  2  can be securely covered by the sheathing  3  by use of the ribs  16  and the recessed surfaces  15 , which are formed on the backside of the back frame cap  2 , so as to achieve the purpose of entirely covering the LCD panel  5  and the printed circuit board (PCB). Moreover, the electromagnetic waves, which are emitted from the LCD panel  5  and the PCB, are also isolated by this sheathing  3 .  
         [0035]     Accordingly, the aluminum extrusion front frame cap  1 , the aluminum extrusion back frame cap  2 , and the aluminum extrusion sheathing  3  of the external framework of the LCD panel can entirely cover the LCD panel  5  and the PCB. The recessed surfaces  15  (shown in  FIG. 7 ), which are formed on the backside of the front frame cap  1 , and the ribs, which are formed on the front side of the back frame cap  2 , can be applied to isolate the electromagnetic waves. Besides, the external framework, which is made of aluminum material, can be applied to further isolate the electromagnetic waves. In comparison with the existing external framework of the LCD panel, the present invention can lighten the integral weight and avoid the cost of metal partitions.  
         [0036]     As shown in  FIG. 12 , for the purpose of mounting, the external framework of the present invention also comprises two brackets  6  on its bottom.  
         [0037]     Moreover, as shown in  FIG. 13 , the external framework disclosed in the present invention may further comprise a speaker frame  7 , which is securely mounted on each side of the external framework. As shown in  FIG. 14  and  FIG. 15 , a recessed trench  71  is formed on the front surface of the speaker frame  7  on which the speaker is mounted and a flexible speaker net  8  is embedded and orientated in this recessed trench  71  by means of the operation shown in  FIG. 15  for sealing the speaker, which is mounted on the front surface of the speaker frame  7 . Accordingly, the assembled external framework of the present invention can be applied to the LCD monitor and used to construct the more perfect audio-visual apparatus.  
         [0038]     Referring to  FIG. 16  and  FIG. 17 , slideways  27  and movable plates  28  are located in the backside of the back frame cap  2  and mounted on its up, down, left, and right sides. The insertion holes  271  are formed around the slideways  27  so as to insert the movable plates  28  into them. The studs  281  are mounted on the movable plates  28 , and the screws  282  are also applied to securely fix the movable plates  28 , wherein the PCB  20  is securely mounted on the studs  281 . The dimensions of the locking holes of the PCBs  20 , which are manufactured by various manufacturers, are different from one another. In order to be suitable for all of the PCBs  20  for locking and fixing the PCB  20  inside the backside of the back frame cap  2 , the movable plates  28  and the studs  281  are applied to change the method of fixing the PCB  20 . A hollow surface is formed on the center of the backside of back frame cap  2 . In order to fix the PCB  20 , the X-axial and Y-axial slideways  29  are applied such that the movable plates  28  can be shifted up, down, left, and right in the trenches  291  of the X-axial and Y-axial slideways  29 .