Abstract:
An optical recording apparatus includes a traverse, a control circuit board, a shield substrate and an flexible flat cable (FFC). The traverse includes a spindle motor for rotating an optical disc and an optical pickup head for reading and/or writing the optical disc, the optical pickup head moves along a radial direction of the optical disc when reading and/or writing the optical disc. The FFC electrically connects the optical pickup head and the control circuit board and transmits signals between them, and a portion of the FFC adjacent to the second end is bent to facing the shield substrate. The shield substrate includes at least two limiting members, and the at least two limiting members are positioned at two opposite sides of the portion of the FFC facing the shield substrate to enable the portion of the FFC facing the shield substrate to move along the first direction.

Description:
BACKGROUND 
     1. Technical Field 
     The present disclosure generally relates to an optical recording apparatus for reading and/or writing an optical disc, and more particularly, to an optical recording apparatus with limiting members. 
     2. Description of Related Art 
     Many optical recording apparatus include an optical pickup head, a control circuit board, and a flexible flat cable (FFC) transmitting signals between the optical pickup head and the control circuit board. The optical pickup head reads and/or writes a disc while moving across the disc. Two opposite ends of the FFC are connected to the optical pickup head and the control circuit board, correspondingly. One end of the FFC is connected to the control circuit board which is fixed, and the other end of the FFC is connected to the optical pickup head and may move with the optical pickup head. Normally, a section of the FFC adjacent to the control circuit board is tightly adhered to a shield substrate to limit movement of the section of the FFC adjacent to the control circuit board. 
     However, it is problematic and inconvenient for an operator to re-assemble the tightly adhered section of the FFC when the FFC is damaged, and this kind of re-assembly of the optical recording and/or reproducing apparatus is inconvenient and time-consuming, and adds to the cost of mass manufacturing the optical recording apparatus. 
     What is needed, therefore, is a means which can overcome the described limitations. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views, and all the views are schematic. 
         FIG. 1  is an isometric, exploded view of an optical recording apparatus in accordance with an exemplary embodiment, the optical recording apparatus including a control circuit board, a shield substrate and a FFC. 
         FIG. 2  is an isometric view of the shield substrate of  FIG. 1 . 
         FIG. 3  is an assembly view of the control circuit board, the shield substrate and the FFC of  FIG. 1 . 
         FIG. 4  is an enlarged, isometric view of a circled portion IV of the optical recording apparatus of  FIG. 2 . 
         FIG. 5  is an enlarged, isometric view of a circled portion V of the optical recording apparatus of  FIG. 2 . No new matter has been added. 
     
    
    
     DETAILED DESCRIPTION 
     Reference will be made to the drawings to describe the embodiments in detail. 
       FIG. 1  is an optical recording apparatus  1  in accordance with an exemplary embodiment. The optical recording apparatus  1  includes a top frame  11 , a bottom frame  12 , a traverse  13 , a control circuit board  14 , a shield substrate  15  and an FFC  16 . The top frame  11  and the bottom frame  12  cooperatively define a space to accommodate the traverse  13 , the control circuit board  14 , the shield substrate  15  and the FFC  16 . The traverse  13  and the control circuit board  14  are mounted on the shield substrate  15  side by side. 
     The traverse  13  includes an optical pickup head  130 , a bearing base  132 , and a spindle motor  134 . The bearing base  132  defines an opening  136  extending, along a first direction. The spindle motor  134  is rotatably mounted on the bearing base  132  and exposed from the opening  136 . A top of the spindle motor  134  forms a turntable  137 . The turntable  137  is used to fix and rotate an optical disc arranged on an annular supporting surface of the turntable  137 . The first direction is parallel to a radial direction of the turntable  137 . The optical pickup head  130  is movably engaged in the opening  136 , and configured to move back or forth along the opening  136 . When the optical pickup head  130  moves along the first direction and across, the optical disc rotates on the turntable  137 , the optical pickup head  130  can read and/or write to the optical disc. 
     The FFC  16  transmits signals between the optical pickup head  130  and the control circuit board  14 . The FFC  16  includes a first end  161  and a second end  163  opposite to the first end  161 . The first end  161  is connected to the optical pickup head  130 , and the second end  163  is connected to the control circuit board  14 . A first portion of the FFC  16  adjacent to the first end  161  is received in the opening  136 . A second portion of the FFC  16  adjacent to the second end  163  is bent to the rear of the bearing base  132  to face the shield substrate  15 . 
     Referring also to  FIG. 2 ,  FIG. 4 , and  FIG. 5 , the shield substrate  15  includes a bottom plate  150 , and the bottom plate  150  includes a fixing region  159  corresponding to the opening  136  to receive the second portion of the FFC  16  facing the shield substrate  15  and at least two limiting members formed in the fixing region  159  to limit the FFC  16  to only move in the fixing region  159  along the first direction. In the illustrated embodiment, the shield substrate  15  includes four limiting members  156 . The fixing region  159  includes an accommodating groove defined in the bottom plate  150 . In the embodiment, a depth of the accommodating groove is substantially equal to a thickness of the FFC  16 . The fixing region  159  further includes four mounting holes  151  defined at a bottom of the accommodating groove. In the embodiment, each mounting hole  151  is rectangle and includes two first sides  155  parallel to the first direction, and two second sides  157  perpendicular to the first direction. Each limiting member  156  extends from a corresponding one of the two first sides  155  of each mounting hole  151 . 
     Each limiting member  156  includes an extending portion  153 , a resistant portion  152 , and a pressing portion  154 . The extending portion  153  extends horizontally from the corresponding one of the two first sides  155  of the mounting hole  151 , the pressing portion  154  is substantially parallel to the extending portion  153 , and the resistant portion  152  perpendicularly interconnects the extending portion  153  and the pressing portion  154 . A crossing line where the extending portion  153  meets the resistant portion  152  is parallel to the first direction. The extending portion  153  and the pressing portion  154  of each limiting member  156  are located at two opposite sides of the resistant portion  152 . 
     The four mounting holes  151  can be designed to have a same size or have a different size, the four limiting members  156  can be designed to have a different size as shown in  FIG. 2  or have a same size. In the embodiment, one of the four limiting members  156  has a bigger size than the other three limiting members  156 , and a conductive foam  18  which is attached to the spindle motor  134  can be adhered on a top surface of the pressing portion  154  of the limiting member  156  which has the bigger size, as a result, static electricity from the spindle motor  134  can be grounded via the conductive foam  18  and the shield substrate  15 . Further, the top surface of the pressing portion  154  of the limiting member  156  which has the bigger size defines a through hole  1542 , and a rib  1546  extends from periphery of the through hole  1542  to strengthen the adhesion between the pressing portion  154  and the conductive foam  18 . 
     The four resistant portions  152  of the four limiting members  156  are arranged at two opposite sides of the accommodating groove and arranged in two rows to align with the two opposite sides of the FFC  16 . A distance perpendicular to the first direction and between the two rows formed by the four resistant portions  152  is substantially equal to or slightly wider than a width of the FFC  16 , thereby defining a moving rail for the FFC  16 . The pressing portion  154  and the resistant portion  152  of each limiting member  156  define an entrance to mount the FFC  16 . A length of the corresponding one of the two first sides  155  of each mounting hole  151  is longer than a length of the extending portion  153  connected to the corresponding one of the two first sides  155  of each mounting hole  151 , and as a result, two receiving spaces  158  are formed between the extending portion  153  and the two second sides  157  of the mounting hole  151 . 
     In assembly, a side of the FFC  16  is inserted into the entrances defined by the limiting members  156  arranged in one of the two rows, and the opposite side of the FFC  16  is inserted into the entrances defined by the limiting members  156  arranged in the other one of the two rows. The two sides of the FFC  16  abut against the resistant portions  152  arranged in two rows, correspondingly, and the FFC  16  may move along the moving rail defined by the resistant portions  152  of the limiting members  156 . The traverse  13  and the control circuit board  14  are mounted on the shield substrate  15  side by side. The second end  163  of the FFC  16  is connected to the control circuit board  14 , and the portion of the FFC  16  adjacent to the second end  163  is located between the rear of the bearing base  132  and the shield substrate  15 , and the portion of the FFC  16  adjacent to the first end  161  is bent to be received in the opening  136 , and the first end  161  of the FFC  16  is connected to the optical pickup head  130  of the traverse  13 . 
     Because two receiving spaces  158  are formed between the extending portion  153  and the two second sides  157  of each mounting hole  151 , when the one side of the FFC  16  is inserted into the entrances defined by the limiting members  156  arranged in one of the two rows, the FFC  16  can be pushed to move continuously into the receiving spaces  158 , to increase the distance between the other side of the FFC  16  and the resistant portions  152  arranged in the other one of the two rows, thus the other side of the FFC  16  can be easily inserted into the entrances defined by the limiting members  156  arranged in the other one of the two rows. The position of the FFC  16  received in the fixing region  159  is then adjusted to make the two sides of the FFC  16  abut against the resistant portions  152  arranged in two rows, correspondingly. Similarly, when FFC  16  is removed from the limiting members  156 , one side of the FFC  16  can be pushed to move into corresponding receiving spaces  158 , thus increasing the distance between the other side of the FFC  16  and the resistant portion  152  arranged in the other one of the two rows, and the other side of the FFC  16  can be easily removed from the entrances defined by the limiting members  156  arranged in the other one of the two rows. 
     With the above-described configuration, the FFC  16  can be quickly and securely engaged in the limiting members  156 . Similarly, the FFC  16  can be quickly and safely removed from the limiting members  156 . And due to the limiting members  156  limiting the movement of the FFC  16 , the risk of the FFC  16  being damaged is relatively low. 
     The optical recording apparatus  1  herein is not limited to the above-described embodiments. For example, in alternative embodiments, the optical recording apparatus  1  can includes two, three or more limiting members  156  located at two opposite sides of the FFC  16 . In other embodiments, each limiting member  156  only includes the resistant portion  152  and the pressing portion  154  to limit the movement of the FFC  16 , the resistant portion  152  perpendicularly extends from the bottom of the accommodating groove and is parallel to the first direction, the pressing portion  154  connects to the resistant portion  152 , and the pressing portion  154  and the resistant portion  152  ensure the FFC  16  move along the first direction. The shapes of the limiting members  156  can be configured according to particular requirements. 
     It is believed that the present embodiments and their advantages will be understood from the foregoing description, and it will be apparent that various changes may be made thereto without departing from the spirit and scope of the embodiments or sacrificing all of their material advantages.