Abstract:
An assembling structure of an optical disc drive is provided to comprise a chassis, for supporting a tray, wherein the tray is used for loading and unloading an optical disc, and the chassis has an assembling recess horizontally disposed at side of the chassis and positioned under the tray; a top cover, having an assembling element accommodated in the assembling recess of the chassis; and a bottom cover, positioned under the chassis and assembled to the top cover.

Description:
[0001]    This application claims the benefit of People&#39;s Republic of China application Serial No. 200910265613.7, filed Dec. 28, 2009, the subject matter of which is incorporated herein by reference. 
       BACKGROUND OF THE INVENTION 
       [0002]    1. Field of the Invention 
         [0003]    The invention relates in general to an assembling method and structure of an optical disc drive, and more particularly to an assembling method and structure of a top cover, a bottom cover and a chassis of the optical disc drive. 
         [0004]    2. Description of the Related Art 
         [0005]    In the beginning, the optical disc drive is designed to be installed in the computer, and the optical disc drive has a standard size in this industry for being compatible with the computer. Recently, according to the development of the implementation of the optical disc drive, the optical disc drive may be installed in various consumer products not only in the computer. However, the size of the optical disc drive installed in the other consumer products is still a standard one. It is because that, based on the same size of optical disc drive, the optical disc drive manufacturer can use the same design to manufacture the optical disc drive for various implementations for saving a large cost of design change. 
         [0006]    However, the size of the consumer product is smaller in order to raise the competition position in the market. In other words, the size of the optical disc drive for installing in the consumer product needs to be smaller than that for installing in the computer. It means that the design change of the optical disc drive can not be avoided. Therefore, how to reduce the size of the optical disc drive with less cost is an important project in this industry. 
         [0007]    Please refer to  FIG. 1  and  FIG. 2 .  FIG. 1  is an explosive view of a traditional optical disc drive  100 , and  FIG. 2  is a cross-section view of the traditional optical disc drive  100 . The optical disc drive  100  comprises a top cover  110 , a bottom cover  120 , a chassis  130  and a tray  140 . The chassis  130  is used for supporting internal elements needed in the optical disc drive  100 , for example a optical pickup head, a spindle motor, a PCB plate and so on. The tray  140  is moveably installed on the chassis for loading/unloading an optical disc  150 . 
         [0008]    In general, the width of the tray  140  and the width of the optical disc  150  are approximately equal, and the smallest width of the chassis  130  may design to be a little larger than the width of the tray  140  as the width D shown in  FIG. 2 . However, in the traditional optical disc drive, in order to assemble the top cover  110 , bottom cover  120  and the chassis  130  together, a locking space  131  is outwardly extended from both sides of the chassis  130 , and the bottom of the locking space  131  has a plural of locking holes  132 . Relatively, a plural of locking elements  111  are inwardly extended from both sides of the top cover  110 , and each locking element  111  has a locking hole formed on which. Also, the bottom cover  120  comprises a plural of locking holes  121 . The above mentioned locking holes  132 ,  111  and  121  are related to each other and locked by screws  160  for assembling the top cover  110 , bottom cover and the chassis together. 
         [0009]    As shown in  FIG. 2 , because the locking space  131  are outwardly extended from the two sides of the chassis  130 , the width of the traditional optical disc drive as a whole should further add the width L of the locking space  131 . Accordingly, though the assembling design of the traditional optical disc drive has been used for a long time, it should be changed for being compatible with the consumer products, which have small size, in order to raise the competition position in the market. 
       SUMMARY OF THE INVENTION 
       [0010]    Accordingly, the invention provides an assembling method and structure of an optical disc drive that can efficiently reduce the width of the optical disc drive without changing the design of the internal elements of the optical disc drive and raise the competition position of the optical disc drive in the market. 
         [0011]    According to a first aspect of the present invention, an assembling structure of an optical disc drive is provided to comprise a chassis, for supporting a tray, wherein the tray is used for loading and unloading an optical disc, and the chassis has an assembling recess horizontally disposed at side of the chassis and positioned under the tray; a top cover, having an assembling element accommodated in the assembling recess of the chassis; and a bottom cover, positioned under the chassis and assembled to the top cover. 
         [0012]    According to a second aspect of the present invention, an assembling method of an optical disc drive is provided. The optical disc drive has a chassis, a top cover and a bottom cover, and the assembling method comprises steps of: assembling the top cover to the chassis by horizontally moving the top cover related to the chassis; and assembling the bottom cover to the chassis and the top cover by upwardly moving the bottom cover related to the chassis and the top cover. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0013]    The invention will become apparent from the following detailed description of the preferred but non-limiting embodiments. The following description is made with reference to the accompanying drawings. 
           [0014]      FIG. 1  is an explosive view of a traditional optical disc drive; 
           [0015]      FIG. 2  is a cross-section view of the traditional optical disc drive; 
           [0016]      FIG. 3  is an explosive view of an optical disc drive according to a preferred embodiment of the present invention; 
           [0017]      FIG. 4  is a cross-section view of an optical disc drive according to the preferred embodiment of the present invention; 
           [0018]      FIG. 5  shows the top cover and the chassis during the assembling process according to the preferred embodiment of the present invention; 
           [0019]      FIG. 6  shows the top cover and the chassis after completing the assembling process according to the preferred embodiment of the present invention; 
           [0020]      FIG. 7  shows the completed assembly shown in  FIG. 6  and the bottom cover during the assembling process according to the preferred embodiment of the present invention; 
           [0021]      FIG. 8  shows the top cover, the chassis and the bottom cover after completing the assembling process according to the preferred embodiment of the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0022]    Please refer to  FIG. 3  and  FIG. 4 , which respectively show an explosive view and a cross-section view of an optical disc drive  200  according to a preferred embodiment of the present invention. The present invention provides an optical disc drive  200  which comprises a top cover  210 , a bottom cover  220 , a chassis  230  and a tray  240 . The chassis  230  is used for supporting internal elements, for example an optical pick-up head, a spindle motor, a PCB plate and so on, of the optical disc drive  200 . The tray  240  is moveably disposed on the chassis  230  for loading and unloading an optical disc  250 . The chassis  230  has assembling recesses  232  horizontally disposed at two sides of the chassis  230 , and the assembling recesses  232  are located under the tray  240 . The top cover  210  has side walls  211  and assembling elements  213 . The assembling elements  213  are internal extended from the side walls  211  of the top cover  210 , and the assembling elements  213  are relatively accommodated in the assembling recesses  232  of the chassis  230 . 
         [0023]    Please refer to  FIG. 5  to  FIG. 8 .  FIG. 5  shows the top cover  210  and the chassis  230  during the assembling process according to the preferred embodiment of the present invention.  FIG. 6  shows the top cover  210  and the chassis  230  after completing the assembling process according to the preferred embodiment of the present invention.  FIG. 7  shows the completed assembly shown in  FIG. 6  and the bottom cover  220  during the assembling process according to the preferred embodiment of the present invention.  FIG. 8  shows the top cover  210 , the chassis  230  and the bottom cover  220  after completing the assembling process according to the preferred embodiment of the present invention. 
         [0024]    The present invention further provides an assembling method of an optical disc drive  200 . First, the top cover  210  is assembled to the chassis  230  by horizontally moving the top cover  210  related to the chassis  230 . At that time, the assembling elements  213  are relatively moved in the assembling recesses  232 . As shown in  FIG. 5 , the top cover  210  is moved from the back side to the front side of the chassis  230  along the arrow A. The completed assembly of the top cover  210  and the chassis  230  is shown in  FIG. 6 . Then, the bottom cover  220  is assembled to the completed assembly of the top cover  210  and the chassis  230  by upwardly moving the bottom cover  220  related to the completed assembly of the top cover  210  and the chassis  230  as shown in  FIG. 7 . Moreover, a plurality of crews  260  can be used to screw the bottom cover  220  to the completed assembly of the top cover  210  and the chassis  230 . The final completed assembly of the top cover  210 , the chassis  230  and the bottom cover  220  is shown in  FIG. 8 . 
         [0025]    The optical disc drive  200  according to the present invention, the assembling recesses  232  are located under the tray  240  so that the assembling space of the top cover  210 , the chassis  230  and the bottom cover  220  is located under the tray  240  too. Therefore, the width of the optical disc drive  200  as a whole according to the present invention is reduced, and the width T of the optical disc drive as shown in  FIG. 4  can be designed to have a smallest width as the width of the tray  240 . 
         [0026]    Please refer to  FIG. 3  again. The chassis  230  of the optical disc drive  200  according to the present invention further comprises a plurality of positioning pillars  233 ,  234 , and the top cover  210  and the bottom cover  220  can respectively have a plurality of positioning holes  212 ,  221  related to the positioning pillars  233 ,  234  of the chassis  230 . 
         [0027]    Please refer to  FIG. 5  and  FIG. 6 . When the assembling elements  213  of the top cover  210  moves forward along the assembling recesses  232  of the chassis  230  and to cover the top of the chassis  230 , the top cover  210  further downwardly moves related to the chassis  230  so that the positioning pillars  233  of the chassis  230  are engages with related positioning holes  212  of the top cover  210  as show in  FIG. 7  and  FIG. 8 . 
         [0028]    Please refer to  FIG. 3  again. The bottom cover  220  of the optical disc drive according to the present invention further comprises side walls  223 , and the side walls  211  of the top cover  210  have depression step  214  for accommodating the side walls  223  of the bottom cover  220 . Please refer to  FIG. 4 ,  FIG. 7  and  FIG. 8 . when the bottom cover  220  is assembled to the top cover  210  and the chassis  230 , the side walls  223  of the bottom cover  220  are accommodated in the depression step  214  of the top cover  210  as shown in  FIG. 4  and  FIG. 8 . 
         [0029]    According to the optical disc drive and its assembling method of the present invention, it can efficiently reduce the width of the optical disc drive without changing the design of the internal elements, therefore, improving the marketing competition. 
         [0030]    While the invention has been described by way of example and in terms of a preferred embodiment, it is to be understood that the invention is not limited thereto. On the contrary, it is intended to cover various modifications and similar arrangements and procedures, and the scope of the appended claims therefore should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements and procedures.