JP4924410B2 - Optical disk device - Google Patents

Description

  The present invention relates to an optical disc apparatus such as a DVD or a CD, and in particular, has been improved so that a flexible flat cable can be positioned on a cable attaching portion on the back of a traverse chassis and attached in two ways, and the cable can be pulled out from a loader chassis in two directions. Relates to the optical disc apparatus.

  FIG. 9 is a schematic partial bottom view of a conventional optical disc apparatus, and FIG. 10 is a schematic sectional view of a traverse chassis on which a conventional turntable and an optical pickup are mounted. As shown in FIG. 10, this optical disc apparatus is provided with a turntable 3 that is rotated by a spindle motor M at the front end portion of the traverse chassis 2, and two optical pickups 4 are arranged behind the turntable 3 of the traverse chassis 2. It is mounted so as to be movable back and forth along the guide shaft 5. When the flexible flat cable 7 extending rearward from the wiring board 6 of the optical pickup 4 is connected to a main wiring board (not shown) provided on the side of the loader chassis 1, as shown in FIGS. The flexible flat cable 7 is routed to the back side of the traverse chassis 2, a U-shaped folded portion is formed in the middle of the flexible flat cable 7, and the cable 7 is bent at a right angle at the end of the U-shaped folded portion. 7a is affixed to the cable affixing part 2a while being positioned by positioning ribs 2b provided on the cable affixing part 2a on the back side of the traverse chassis, and the leading end of the flexible flat cable 6 is pulled out to the side of the loader chassis 1.

  On the other hand, a large number of hooks with a flexible cable holding function and a bending function are float-based so that the wiring of the flexible cable that connects the circuit board to the optical pickup, the spindle motor for the turntable, etc. can be directed in multiple directions. Has been proposed (Patent Document 1).

Also, a disk deck provided with three holder portions for holding a flexible wiring board having a circular terminal forming portion on three surfaces of the frame body so that the flexible wiring board can be routed in three directions (Patent Document 2). An optical disk that balances the force applied to the optical head by connecting the optical head slidably supported by the support member and the control circuit disposed on the support member with two cables. An apparatus (Patent Document 3) has also been proposed.
JP 2002-260366 A JP 2001-60371 A Japanese Patent Laid-Open No. 3-116444

  However, in the conventional optical disk device described above, when the main wiring board is disposed behind the loader chassis 1, the flexible flat cable 7 routed to the back side of the traverse chassis 2 is provided as shown by the phantom line in FIG. Even if the cable folding portion 7b is pasted on the cable pasting portion 2a and the flexible flat cable 7 is pulled out to the rear of the loader chassis 1 and connected to the main wiring board, the positioning rib 2b gets in the way. There exists a problem that the cable folding | returning part 7b cannot be affixed on the cable sticking part 2a.

  However, if the positioning rib 2b is removed or a positioning line is provided, the affixing position of the cable bent portion 7a is shifted, and the length of the flexible flat cable 7 from the optical pickup 4 to the cable affixing portion 2a is insufficient. If the length of the cable is insufficient, the cable 7 bends near the rear end of the cable affixing portion 2a when the optical pickup 4 moves forward as indicated by a virtual line in FIG. There is a risk of disconnection. If the cable 7 is too long, there is a problem that the cable 7 hits the rear frame portion of the loader chassis 1 when the optical pickup 4 moves rearward. Therefore, in the conventional optical disk apparatus, the positioning rib 2b is provided and the cable bent portion 7a is positioned and pasted to the cable pasting portion 2a, and the distal end portion of the flexible flat cable 7 has to be pulled out in one direction (side). Therefore, there is a problem that the degree of freedom of the set layout is small.

  On the other hand, the recording medium reproducing unit of Patent Document 1 can position the flexible cable wiring by a plurality of hooks and direct it in a plurality of directions, but the positioning means is a hook, and the flexible cable Since the float base is not positioned and wired in a plurality of directions, even if the technique of Patent Document 1 is applied to the conventional optical disc apparatus described above, the above problem cannot be solved.

  Similarly, the disk deck of Patent Document 2 also positions the flexible wiring board in three directions with holder portions provided on the three surfaces of the frame body, and positions the flexible wiring board in one place on the way of the frame body. Thus, since the wiring is not performed in a plurality of directions, the above problem cannot be solved even if this technique is applied to the conventional optical disk apparatus.

  In addition, the optical disk apparatus of Patent Document 3 is such that only the optical head and the control circuit are connected by two cables in order to balance the force applied to the optical head. Even if it is applied to a conventional optical disc apparatus, the above problem cannot be solved at all.

  The present invention has been made under the above circumstances, and the problem to be solved is to position the flexible flat cable on the cable affixing portion on the back of the traverse chassis and affix the cable in two ways. An object of the present invention is to provide an optical disc apparatus that can be pulled out in the direction and has a high degree of freedom in set layout.

In order to solve the above-described problems, an optical disc apparatus according to the present invention includes a loader chassis, a traverse chassis attached to the loader chassis, an optical pickup provided with a wiring board and mounted on the traverse chassis, and an optical pickup of the optical pickup. comprising a flexible flat cable connecting the wiring board provided outside of the wiring substrate and the main chassis, and a cable attached part provided on the rear surface of the traverse chassis, the flexible flat cable, the middle portion And a U-shaped folded portion extending from the wiring board of the optical pickup and routed to the back side of the traverse chassis.

And the said cable sticking part has the 1st sticking surface and the 2nd sticking surface which adjoin in the left-right direction, and the rear end of those 1st sticking surfaces and the rear end of the 2nd sticking surface are straight lines with the same height. The rear ends of the optical pickup move in the approaching and separating direction with respect to the U-shaped folded portion at a position facing the U-shaped folded portion of the flexible flat cable as the optical pickup moves in the front-rear direction. Are formed at the rear end of the first application surface and the rear end of the second application surface, and the first application surface has the U-shaped folded portion of the flexible flat cable. Is a surface to paste the vicinity of the cable bent portion bent at a right angle at the terminal end of the cable, and is formed as an inclined surface that becomes lower from the rear end toward the front, and at the front corner of the first application surface As the first positioning means A cable that is provided with "<"-shaped positioning ribs that contact the cable bent part to contact the front, rear, left and right, and the second affixing surface is a cable obtained by folding the flexible flat cable at the end of the U-shaped folded part A surface to which the folded portion is pasted, which is formed as a horizontal plane, and a positioning step portion for positioning the cable folded portion in front, back, left and right as the second positioning means is provided on the second pasting surface, and the positioning A step portion is formed at the boundary between the first sticking surface and the second sticking surface, and a step formed at the front end of the second sticking surface and perpendicular to the step portion and above the positioning rib. It is comprised by the part. In the present invention, the "<"-shaped positioning rib is provided with a 135 [deg.] Bend, and the second affixing surface is 180 [deg.] At the end of the U-shaped folded portion of the flexible flat cable. This is a surface to which the folded cable folded portion is affixed, and includes the one in which the positioning step portion for positioning the folded cable portion in contact with the cable folded portion is bent at a right angle.

  As in the optical disc apparatus of the present invention, the cable affixing portion has a first affixing surface and a second affixing surface, and the first affixing surface is provided with first positioning means for positioning the flexible flat cable in the front-rear and left-right directions. If the second affixing surface is provided with second positioning means for positioning the flexible flat cable in the front-rear and left-right directions, the first affixing is performed while positioning the flexible flat cable in the front-rear and left-right directions by the first positioning means or the second positioning means. Affixed to the surface or the second affixing surface in two forms (for example, a form in which the cable is bent in a right angle direction or a form in which the cable is folded back 180 °), and the flexible flat cable is attached in two directions (for example, side or rear) from the loader chassis. Can be pulled out. Therefore, the degree of freedom of the set layout is greater than that of the conventional optical disk device, and the flexible flat cable is positioned by the first positioning means or the second positioning means, so that the cable length from the optical pickup to the cable affixing portion is appropriate. Therefore, fear of disconnection can be eliminated.

  In the optical disk apparatus according to the present invention, the first sticking surface of the cable sticking portion is a surface for sticking a portion near the cable bent portion obtained by bending the flexible flat cable in a right angle direction, and is used as the first positioning means. "" -Shaped positioning ribs are provided, so that the cable bending portion of the flexible flat cable at right angles can be accurately positioned by contacting the inner surface of the "<"-shaped positioning ribs. In the state, the flexible flat cable can be pulled out from the loader chassis to the side by sticking the vicinity of the cable bent portion to the first sticking surface.

  And the 2nd sticking surface of a cable sticking part is a surface which sticks the cable folding | turning part which turned the flexible flat cable 180 degrees, Comprising: The positioning level | step-difference part bent at right angle as a 2nd positioning means is 1st sticking surface and 2nd If it is provided at the boundary with the application surface, it can be positioned accurately by contacting the cable folding part of the flexible flat cable with the inner surface of the positioning step part bent at a right angle. By sticking the folded portion on the second sticking surface, the flexible flat cable can be pulled out from the loader chassis.

  The first application surface is an inclined surface that decreases from the rear end toward the front, the second application surface is a horizontal surface, and the rear end of the first application surface and the rear end of the second application surface are at the same height. Because it is connected in a straight line, the first attachment from the wiring board of the optical pickup can be applied whether the cable bent part of the flexible flat cable is attached to the first application surface or the cable folded part is applied to the second application surface. Since the cable length to the rear end of the surface or the second application surface is the same, the trouble of changing the cable length between the application to the first application surface and the application to the second application surface is eliminated. . And what is rounded at the rear end of the first sticking surface and the second sticking surface that are linearly connected at the same height, the flexible flat cable is in the vicinity of the first and second sticking surfaces. It is possible to eliminate the possibility of bending and disconnection at a location.

  Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a plan view showing an optical disk apparatus according to an embodiment of the present invention with the disk tray omitted, FIG. 2 is a schematic bottom view of the optical disk apparatus with the flexible flat cable pulled out to the side, and FIG. 3 is a flexible flat cable. FIG. 4 is a schematic cross-sectional view of the traverse chassis on which the optical pickup and turntable of the optical disc apparatus are mounted, and FIG. 5 is a perspective view of the optical disc apparatus with the traverse chassis turned upside down. FIG. 6 is a perspective view of the cable affixing portion on the back surface of the traverse chassis, FIG. 7 is a perspective view showing the vicinity of the cable bent portion of the flexible flat cable on the first affixing surface of the cable affixing portion, and FIG. The flexible flat cable folded part was attached to the second application surface of the cable application part. Is a perspective view showing the rollers.

  As shown in FIG. 1, in this optical disk apparatus, a synthetic resin traverse chassis 2 is swung up and down using a mounting screw 7a and a rubber damper 7b on both sides of the rear end of a synthetic resin loader chassis 1. As shown in FIGS. 1 and 4, a turntable 3 that is rotated by a spindle motor M is provided at the front end of the traverse chassis 2, and a rear side of the turntable 3 of the traverse chassis 2 is provided behind the turntable 3. Each optical pickup 4 is mounted. 1 to 3, the upper side of the page is the front and the lower side is the back, and in FIG. 4, the right side of the page is the front and the left side is the rear.

  The turntable 3 is fixed to the output shaft of the spindle motor M attached to the front end of the traverse chassis 2, and when the traverse chassis 2 rotates upward, the turntable 3 and the clamper 8 directly above the turntable 3. The optical disk is rotated with a central opening edge of the optical disk interposed therebetween. The clamper 8 is rotatably held by a clamper holding portion 1b at the center of the bridge portion 1a formed integrally with the loader chassis 1.

  The optical pickup 4 is mounted so as to move in the front-rear direction (direction approaching or moving away from the turntable 3) along the guide shafts 5 and 5 by a pinion 9 meshing with the rack 4a. The optical disk is irradiated with a laser beam from the objective lens 4b while approaching the turntable 3 to perform recording / reproduction. And the flexible flat cable 7 which connects the wiring board 6 of this optical pick-up 4 and the main wiring board 10 arrange | positioned at the side of the loader chassis 1 is shown in FIG. 1, FIG. 2, FIG. A halfway portion extends from the wiring board 6 of the optical pickup 4 to form a U-shaped folded portion that is routed to the back side of the traverse chassis 2, and the end portion of the U-shaped folded portion is folded in a perpendicular direction. The vicinity 7c of the cable bent portion 7a is attached to the first attaching surface 11a of the cable attaching portion formed on the back surface of the traverse chassis 2 with a double-sided adhesive tape, and the distal end portion of the flexible flat cable 7 is the loader chassis. 1 to the side main wiring board 10. In addition, this cable sticking part is demonstrated in detail later.

  The front end of the traverse chassis 2 is formed with two convex portions 2c and 2d protruding forward, and a cam slider 12 made of synthetic resin provided with a cam groove 12a into which the convex portions 2c and 2d are respectively inserted. The loader chassis 1 is attached to the front frame portion 1c so as to be slidable left and right. When the rack 12b of the cam slider 12 is engaged with the drive pinion 13 and the cam slider 12 slides in the right direction R in FIG. 1, the convex portions 2c and 2d of the traverse chassis 2 descend while sliding in the cam groove. Therefore, the traverse chassis 2 rotates downward, and when the cam slider 12 slides in the left direction L, the traverse chassis 2 rotates upward.

  A disk tray (not shown) on which an optical disk is loaded and inserted is disposed between the traverse chassis 2 and the bridge portion 1a of the loader chassis 1 so as to be slidable in the front-rear direction inside the loader chassis 1. The disc tray is inserted and ejected when the pinion meshes with the rack on the back of the disc tray and rotates.

  In the above optical disk apparatus, in the closed state of FIG. 1 in which the optical disk is placed on the disk tray and inserted, the traverse chassis 2 is raised, the optical disk is sandwiched between the turntable 3 and the clamper 8 and rotated. While moving toward the turntable 3 along the guide shafts 5 and 5, the optical disk is irradiated with a laser beam, and recording / reproduction is performed. When the recording / reproduction on the optical disk is completed, the rack 12b of the cam slider 12 is engaged with the drive pinion 13, the cam slider 12 slides in the right direction R in FIG. 1, and the traverse chassis 2 rotates downward. The chuck of the optical disk by the turntable 3 and the clamper 8 is released, and the optical disk is placed on the disk tray and ejected.

  A major feature of the optical disk device is the cable sticking portion 11 formed on the back surface of the traverse chassis 2 for sticking the flexible flat cable 7.

  That is, this cable sticking part 11 has the 1st sticking surface 11a and the 2nd sticking surface 11b which adjoin in the left-right direction, as shown in FIG. 5, FIG. As shown in FIG. 7, the first affixing surface 11 a is a surface on which a portion 7 c near the cable bent portion 7 a obtained by bending the flexible flat cable 7 in a right angle direction is affixed with a double-sided adhesive tape 14. As positioning means, a "<"-shaped positioning rib 11c having a bending angle of 135 [deg.] For positioning the cable bent portion 7a in the front-rear and left-right directions is formed at the front corner of the first affixing surface 11a. .

  This 1st sticking surface 11a is made into the inclined surface which becomes low toward the front from the rear end 110a, and the recessed part 111a for saving resin is formed in the rear end side. 5 to 8 are all perspective views of the traverse chassis 2 turned upside down, the first sticking surface 11a is illustrated as an inclined surface that rises forward from the rear end 110a. Actually, it is an inclined surface that decreases from the rear end 110a toward the front as described above.

  As shown in FIG. 8, the second pasting surface 11b adjacent to the first pasting surface 11a is a surface to which the cable folding portion 7b obtained by folding the flexible flat cable 7 by 180 ° is pasted, as shown in FIGS. In addition, the second sticking surface 11b is a horizontal plane. And the positioning level | step-difference part 11d bent at right angle as a 2nd positioning means is formed in the boundary part of this horizontal 2nd sticking surface 11b and said inclined 1st sticking surface 11a. The positioning step portion 11d is formed at the boundary between the first sticking surface 11a and the second sticking surface 11b, and at the front end of the second sticking surface, and is orthogonal to the step portion and the positioning rib 11c. It is comprised by the level | step-difference part located in the upper side of this.

Moreover, as shown in FIG. 6, the rear end 110a of the first sticking surface 11a and the rear end 110b of the second sticking surface 11b are connected in a straight line at the same height, and the rear ends 110a and 110b are connected to each other. As the optical pickup 4 moves in the front-rear direction, the flexible flat cable 7 is configured to move toward and away from the U-shaped folded portion at a position facing the U-shaped folded portion. Furthermore, a radius is formed at the rear end 110a of the first pasting surface 11a and the rear end 110b of the second pasting surface 11b.

  In the optical disk apparatus in which the cable affixing portion 11 is formed on the back surface of the traverse chassis 2, the flexible flat cable 7 extending from the wiring substrate 6 of the optical pickup 4 is connected to the main wiring substrate 10 disposed on the side of the loader chassis 1. 2 and 7, the terminal end of the U-shaped folded portion of the flexible flat cable 7 routed to the back side of the traverse chassis 2 is bent at a right angle, and the cable bent portion 7a is By making contact with the inner surface of the "<"-shaped positioning rib 11c of the one affixing surface 11a, the position 7c in the vicinity of the cable bent portion 7a is double-sided on the first affixing surface 11a while accurately positioning the front, rear, left and right. Apply the adhesive tape 14 and pull the tip of the flexible flat cable 7 from the loader chassis 1 to the side. Good.

  And when connecting the flexible flat cable 7 to the main wiring board 10 arrange | positioned behind the loader chassis 1, as shown in FIG. 3, FIG. The cable turn-back portion 7b is folded back 180 ° at the end portion of the U-shaped turn-back portion, and the cable turn-back portion 7b is brought into contact with the inner surface of the positioning step portion 11d bent at a right angle, thereby accurately positioning the front, rear, left and right Is stuck to the second sticking surface 11b with the double-sided adhesive tape 14, and the leading end portion of the flexible flat cable 7 is pulled out from the loader chassis 1 to the rear.

  In this optical disc apparatus, the flexible flat cable 7 is attached to the first attaching surface 11a or the second attaching surface 11b of the cable attaching portion 11 in two ways as described above, and the flexible flat cable 7 is attached to the side of the loader chassis 1 or Since it can be pulled out rearward, the degree of freedom of set layout becomes larger than that of the conventional optical disc apparatus. In addition, the flexible flat cable 7 is accurately positioned in the front / rear and left / right directions by the positioning rib 11c and the positioning step portion 11d, and the cable length from the wiring board 6 to the cable attaching portion 11 of the optical pickup 4 can be properly maintained. As described above, in combination with the formation of a radius at the rear end 110a of the first sticking surface 11a and the rear end 110b of the second sticking surface 11b, the flexible flat cable 7 is bent in the vicinity of the cable sticking portion 11, The fear of disconnection can be eliminated. Then, when the first sticking surface 11a and the second sticking surface 11b are gathered together with the cable sticking portion 11 as in this optical disc device, the step portion at the boundary between the first sticking surface 11a and the second sticking surface 11b is positioned. This can be used as a means, and it is not necessary to provide a positioning portion separately, so that material costs can be saved. In addition, when the rear end 110a of the first sticking surface 11a and the rear end 110b of the second sticking surface 11b are linearly connected at the same height as in this optical disc device, the case of sticking to the first sticking surface 11a In addition, in the case of pasting on the second pasting surface 11b, the troublesomeness of changing the cable length from the wiring substrate 6 of the optical pickup 4 to the rear end 110a or 110b of the first pasting surface or the second pasting surface may be eliminated. it can.

  The present invention has been described above by taking the optical disk apparatus provided with the cable attaching portion 11 to which the flexible flat cable 7 for connecting the wiring substrate 6 of the optical pickup 4 and the external main wiring substrate 10 is attached as an example. However, as described above, the optical disc apparatus or the like provided with a cable affixing portion to which a flexible flat cable for connecting the relay substrate attached to the back surface of the traverse chassis and the main wiring substrate is affixed. Of course, it is applicable.

1 is a plan view showing an optical disc apparatus according to an embodiment of the present invention with a disc tray omitted. FIG. 2 is a schematic bottom view of the optical disc apparatus in which a flexible flat cable is pulled out to the side. FIG. 2 is a schematic bottom view of the optical disc apparatus in which a flexible flat cable is pulled out rearward. It is a schematic sectional drawing of the traverse chassis which mounts the optical pick-up and turntable of the optical disk device. It is the perspective view which turned over the traverse chassis of the optical disk device. It is a perspective view of the cable sticking part of the back surface of a traverse chassis. It is a perspective view which shows the place which affixed the vicinity location of the cable bending part of a flexible flat cable on the 1st sticking surface of a cable sticking part. It is a perspective view which shows the place which affixed the cable folding | turning part of the flexible flat cable on the 2nd sticking surface of a cable sticking part. It is a general | schematic partial bottom view of the conventional optical disk apparatus. It is a schematic sectional drawing of the traverse chassis which mounts the conventional turntable and the optical pick-up.

DESCRIPTION OF SYMBOLS 1 Loader chassis 2 Traverse chassis 4 Optical pick-up 6 Wiring board 7 Flexible flat cable 7a Cable bending part 7b Cable folding part 7c The vicinity of a cable bending part 10 Main wiring board 11 Cable sticking part 11a First sticking surface 11b Second sticking Surface 11c Positioning rib (first positioning means)
11d Positioning step (second positioning means)
110a Rear end of the first application surface 110b Rear end of the second application surface

Claims (3)

A loader chassis, a traverse chassis attached to the loader chassis, an optical pickup provided with the wiring board and mounted on the traverse chassis, the wiring board of the optical pickup, and a wiring board provided outside the loader chassis A flexible flat cable for connecting the cable, and a cable affixing portion provided on the back surface of the traverse chassis,
The flexible flat cable is an optical disc apparatus having a U-shaped folded portion that extends from the wiring board of the optical pickup and is routed to the back side of the traverse chassis in the middle of the flexible flat cable ,
The cable affixing portion has a first affixing surface and a second affixing surface that are adjacent in the left-right direction, and the rear end of the first affixing surface and the rear end of the second affixing surface are straight and have the same height. The rear ends of the optical pickups move in the approaching / separating direction with respect to the U-shaped folded portion at a position facing the U-shaped folded portion of the flexible flat cable as the optical pickup moves in the front-rear direction. Are formed at the rear end of the first application surface and the rear end of the second application surface,
The first affixing surface is a surface for affixing the vicinity of the cable bent portion obtained by bending the flexible flat cable in a right angle direction at the end portion of the U-shaped folded portion, and is lowered from the rear end toward the front. Is formed as an inclined surface, and, at the front corner of the first sticking surface, as a first positioning means, a cable bending portion is provided to contact the front, rear, left, and right positioning ribs,
The second affixing surface is a surface for affixing a cable folded part obtained by folding the flexible flat cable at the end portion of the U-shaped folded part, and is formed as a horizontal plane, and the second affixing surface has a second positioning means. As a positioning step portion is provided for positioning the cable folded portion in contact with the front, rear, left and right,
The positioning step portion is formed at the boundary between the first sticking surface and the second sticking surface, and is formed at the front end of the second sticking surface and is perpendicular to the step portion and positioned above the positioning rib. An optical disc apparatus comprising: a step portion that performs the above-described steps.   The optical disk apparatus according to claim 1, wherein the “<”-shaped positioning rib has a bend of 135 °.   The second affixing surface is a surface for affixing a cable folding part obtained by folding the flexible flat cable by 180 ° at the end part of the U-shaped folding part, and positioning the cable folding part in front, back, left, and right directions The optical disk apparatus according to claim 1, wherein the step portion is bent at a right angle.

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