JP2005216333A - Optical disk unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve such a problem that a flexible print cable connecting a casing side substrate to a tray side substrate in a conventional disk unit has an almost U-shape, the number of obtainable cables therefore is not large, and in the casing of a single-faced flexible print cable, a direction of a contact point of a connector connected to the flexible print cable is restricted. <P>SOLUTION: An optical disk unit is disclosed in which, a flexible cable has bending parts at one or a plurality of positions to thereby has a first arm part and a second arm part, the first arm part and the second arm part take on an almost U-shape or an almost V-shape in a state in which a tray is housed in a casing part, an end part of the first arm part is connected to the casing part, the second arm part is folded back and its end is connected to the tray part, thereby, an almost linear flexible cable can be used, and the number of obtainable cables can be increased as a result. Also, a direction of an exposed part of a conductor at the end part can be reversed by the bending part, then, the options of connectors connected to the exposed part are widened. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an optical disc apparatus for recording / reproducing information on an optical disc by an optical pickup.

  As a disk mounting method for an optical disk device such as a CD-ROM / R / RW or DVD-ROM / RAM / R / RW mounted on an electronic device, the tray is pulled out from the housing, and the disk is attached to the tray. A system (hereinafter referred to as a tray system) that is mounted back to the housing is generally used. The configuration of a conventional tray type optical disc apparatus will be described below with reference to the drawings.

  FIG. 10 is an external view of a conventional tray type optical disk apparatus, and FIG. 11 is a front view of the conventional tray type optical disk apparatus with the top portion 2a removed. The optical disc apparatus 1 has a housing 2 and a tray 3, and FIGS. 10 and 11 show a state in which the tray 3 is pulled out from the housing 2. The housing 2 is composed of a top 2a and a bottom 2b. The tray 3 is provided with an optical pickup module (PUM) 4. The optical pickup module 4 includes an optical pickup 5 constituting an optical system, a spindle motor 4a for rotating a disk, and a PUM side circuit board 4c constituting a control circuit. The spindle motor 4a has a disk mounting portion 4b for mounting and rotating the disk. Rails 6 are provided on both sides of the tray 3, and both sides are fitted to the rails 7 so as to be slidable in the disk drawing direction. The rail 7 is also fitted to rail guides 8 provided on the inner surfaces of both sides of the housing 2 so as to be slidable in the disk pull-out direction, and the tray 3 can be pulled out of the housing 2 so that the disk can be attached and detached.

  A casing-side circuit board 9 constituting a control circuit is provided on the bottom 2 b of the casing 2. The housing side circuit board 9 is provided with a connector 9a for supplying power from outside and inputting / outputting signals. The housing side circuit board 9 and the PUM side circuit board 4 c provided on the tray 3 are connected by a flexible printed cable 10. Further, the housing side circuit board 9 and the flexible printed cable 10 are connected by a connector 9b, and the PUM side circuit board 4c and the flexible printed cable 10 are connected by a connector 4d. The flexible printed cable 10 is substantially U-shaped, and one arm thereof is folded and connected to the PUM side circuit board 4c. The folding portion 10a moves in parallel with the direction in which the tray 3 is put in and out as the tray 3 is put in and out. Thus, the flexible printed cable 10 does not collide with other members of the optical disk device 1 even when the tray 3 is housed in the housing 2 or when the tray 3 is pulled out to the maximum. The connection state can be maintained.

As prior examples, there are (Patent Document 1), (Patent Document 2), and the like.
Japanese Patent No. 3079959 JP 2000-260174 A

  Since the flexible printed cable 10 having a substantially U-shape has a shape that is discarded at the time of manufacture, compared with a simple shape such as a flexible printed cable on a straight line, a portion of the original plate is discarded. The number cannot be increased and the product unit price must be high.

In addition, in the case of a flexible printed cable in which a copper foil is provided on one side, a conductor exposed portion that becomes a contact point with the connector 4d or the like at the end of the flexible printed cable 10 is generally provided on one side on the copper foil side. Therefore, the contacts of the connectors 9b and 4d that are mounted on the housing side circuit board 9 and the PUM side circuit board 4c and connect the flexible printed cable 10 must be provided so as to be in contact with the conductor exposed portions. However, usually, the case side circuit board 9 and the PUM side circuit board 4c often determine whether the connectors 9b and 4d can be mounted on the front surface or the back surface depending on the height of the component or the mounting space. As a result, it is determined in which direction the exposed conductor of the flexible printed cable 10 is oriented with respect to the connectors 9b and 4d.

  On the other hand, as for the connectors 9b and 4d, there are a lower contact type in which the contact point that contacts the conductor exposed portion is on the board mounting side and an opposite upper contact type, and the case side circuit board 9 can be selected by selecting an appropriate type. Even if the surface on which the connector is mounted is different between the PUM side circuit board 4c and the flexible printed cable 10, it is possible to connect the flexible printed cable 10 to both boards. However, the heights of the lower contact type and upper contact type connectors are not necessarily the same, and both types are not always readily available. Therefore, when designing a product, there have been significant restrictions in selecting a connector and determining a mounting position.

  Moreover, when the flexible printed cable 10 has a double-sided pattern, such a problem does not occur, but the unit price of the product becomes higher than that of the single-sided board as described above.

  The present invention has been made to solve the above-described problem, and is provided with a housing portion, a tray portion held so as to be able to be stored and pulled out in the housing portion, and the tray portion. An optical disc apparatus including a rotation driving means, an optical pickup provided in the tray, and a flexible cable that can transmit at least one of a signal and electric power between the casing and the tray. The flexible cable has a first arm portion and a second arm portion by having one or a plurality of bent portions, and the casing is formed by the first arm portion and the second arm portion. In a state in which the tray is housed in a part, it is substantially U-shaped or substantially V-shaped, the end of the first arm is connected to the casing, and the second arm is folded back Its end is connected to the tray It is characterized in that.

  According to the present invention, since a flexible cable having a simple linear shape can be used, the flexible cable can be made with high productivity and low cost. As a result, the product unit price of the optical disc apparatus can be lowered. For example, when the flexible cable is a flexible printed cable, it is possible to increase the number of steps from the original plate. When the flexible cable is a flexible flat cable, it is easier to manufacture a substantially straight line than a substantially U shape.

  In addition, in the case of a flexible cable such as a single-sided flexible printed cable that has only one side of the exposed conductor at the end, the orientation of the contact point of the connector to be connected to this is limited, which may be a constraint in product design, Since the conductor exposed portion can be set on the opposite surface side by bending, the degree of freedom in selecting a connector to be connected to this can be increased.

According to the first aspect of the present invention, there is provided a housing portion, a tray portion held so as to be housed and drawn out in the housing portion, a rotation driving means provided in the tray portion, and the tray. And an optical pickup device including a flexible cable capable of transmitting at least one of a signal and electric power between the housing unit and the tray unit, wherein the flexible cable is 1 The first arm portion and the second arm portion are provided by having a bent portion or a plurality of bent portions, and the tray is stored in the housing portion by the first arm portion and the second arm portion. In this state, it is substantially U-shaped or substantially V-shaped, the end of the first arm is connected to the housing, the second arm is folded back, and the end is the tray. Connected to the optical section. A click device, it is possible to use a flexible cable those simple shape straight, productivity is high, it can be an inexpensive flexible cable. As a result, the product unit price of the optical disc apparatus can be lowered. In addition, in the case of a flexible cable such as a single-sided flexible printed cable that has only one side of the exposed conductor at the end, the orientation of the contact point of the connector to be connected to this is limited, which may be a constraint in product design, Since the conductor exposed portion can be set on the opposite surface side by bending, the degree of freedom in selecting a connector to be connected to this can be increased.

  The invention according to claim 2 of the present invention is the optical disk apparatus according to claim 1, wherein the flexible cable is a flat cable, and the thickness of the flexible cable can be reduced, and the thin optical disk apparatus is provided. Is possible.

  The invention according to claim 3 of the present invention is the optical disk apparatus according to claim 1, wherein the flexible cable is a flexible printed cable or a flexible flat cable, both of which are thin and can be bent, It is possible to cope with a thin optical disk device.

  The invention according to claim 4 of the present invention is the optical disk apparatus according to claim 1, wherein the flexible cable alone in a state before the bent portion is bent is substantially linear, and is produced when the flexible cable is manufactured. Therefore, the unit price of the optical disk apparatus using the optical disk device can be reduced.

  According to a fifth aspect of the present invention, at least a part of a portion where the flexible cables are in contact with each other at the bent portion is bonded, and the bent portion is prevented from swelling by the optical disk device according to the first aspect. Therefore, it is possible to cope with a thin optical disk device.

  According to a sixth aspect of the present invention, in the optical disk according to the first aspect, the flexible cable connects the circuit board provided in the casing and the circuit board provided in the optical pickup module. According to the apparatus, the circuit board of the housing portion and the circuit board of the optical pickup module can be connected with a method that can be as reliable and inexpensive as the conventional product.

  According to a seventh aspect of the present invention, there is provided the optical disk according to the first aspect, wherein a portion where the flexible cable overlaps and the thickness is increased due to the bent portion is released to the housing side, and an escape portion is provided in the housing. Depending on the apparatus, it is possible to avoid an increase in the thickness of the casing due to the increase in thickness due to the overlapping of the flexible cables, and it becomes possible to cope with a thin optical disk apparatus.

  Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1)
1 is an external view of an optical disk device according to Embodiment 1 of the present invention, FIG. 2 is a front view of the optical disk device according to Embodiment 1 of the present invention with the top of the housing removed, and FIG. 3 is an embodiment of the present invention. FIG. 4 is an external view of the optical disk apparatus before bending the flexible cable, FIG. 4 is an external view of the optical disk apparatus after bending the flexible cable, and FIG. 5 is an optical disk apparatus according to Embodiment 1 of the present invention. It is an external view of the state which stuck the tape after bending of the flexible cable.

  The optical disc apparatus 1 has a housing 2 and a tray 3, and FIGS. 1 and 2 show a state in which the tray 3 is pulled out from the housing 2.

  1 and 2, the housing 2 is composed of a top 2a and a bottom 2b. An optical pickup module 4 is provided on the tray 3. The optical pickup module 4 includes an optical pickup 5 constituting an optical system, a spindle motor 4a for rotating a disk, and a PUM side circuit board 4c constituting a control circuit. The spindle motor 4a has a disk mounting portion 4b for mounting and rotating the disk. Rails 6 are provided on both sides of the tray 3, and both sides are fitted to the rails 7 so as to be slidable in the disk drawing direction. The rail 7 is also fitted to rail guides 8 provided on the inner surfaces of both sides of the housing 2 so as to be slidable in the disk pull-out direction, and the tray 3 can be pulled out of the housing 2 so that the disk can be attached and detached.

  A casing-side circuit board 9 constituting a control circuit is provided on the bottom 2 b of the casing 2. The housing side circuit board 9 is provided with a connector 9a for supplying power from outside and inputting / outputting signals. The housing side circuit board 9 and the PUM side circuit board 4 c provided on the tray 3 are connected by a flexible cable 20. One end of the flexible cable 20 is connected to the housing side circuit board 9 by the connector 9b, and the other end is connected to the connector 4d of the PUM side circuit board 4c.

  Next, the flexible cable 20 will be described in detail.

  The flexible cable 20 is a cable that can be bent, and is preferably a flat-band cable, and more preferably a cable that forms a united shape by arranging the covered wires without overlapping the flat band. As an example, a flexible flat cable may be used. As the material for the coating, vinyl chloride, polyethylene terephthalate, polyester or polyimide is used. These coatings may be formed around the conducting wire by extrusion molding, or may be a product in which conducting wires arranged without contact are sandwiched between the films of the covering material. Further, a structure in which a metal film such as copper foil or aluminum foil or a film-like conductive organic substance is affixed to the surface of the coating or a structure sandwiched between the coatings may be used. By doing so, it may be possible to take measures against unwanted radiation. In addition, the flexible cable 20 is preferably in the form of a single flat band, but there may be a portion where the partially adjacent covered wires are not integrated. In this case, a plurality of flat belts are formed in this portion, but in some cases, distortion due to torsion can be dispersed.

  Alternatively, a conductive wire may be formed by attaching a conductive metal such as copper in a foil shape to a bendable insulating film. In this case, in addition to the conductive metal in the form of a foil, a conductive organic substance in the form of a film may be used. As an example, a flexible printed cable may be used. Although a single flat belt shape is desirable, a through hole such as a long hole may be provided to partially avoid the conductive portion. By doing so, the distortion with respect to twist may be dispersed.

As shown in FIG. 3, the flexible cable 20 is substantially linear before being bent. As a result, in the case of a flexible printed cable, the number of parts taken from the same size of the original plate can be increased as compared with the conventional U-shaped flexible printed cable, so that the material unit price can be reduced. In addition, although the number of steps is reduced as compared with the case of a straight line, a shape having a predetermined amount of curve may be used. If the end of the flexible printed cable cannot be positioned at the position of the connector of the housing side circuit board 9 or the PUM side circuit board 4c even by bending of the flexible printed cable described later, the end of the flexible printed cable is thus obtained. May be able to match the position of the connector.

  As shown in FIG. 3, the flexible cable 20 is provided with a bent portion 20a, an adhesive portion 20b is provided on the front surface 20d, and an adhesive portion 20c is provided on the back surface 20e. Here, the back surface 20e is a surface of the flexible cable 20 that is mainly a bonding surface with the housing when attached to the housing, and the front surface 20d is the opposite surface. The bent portion 20a forms a crease and is bent so as not to easily return to the original state. In FIG. 3 (a), the bent portion 20a is bent into a mountain fold to obtain a shape after bending as shown in FIG. The bending portion 20a may be previously marked for ease of bending, may be marked with a ruled line, or may be previously bent with a mold or the like. The flexible cable 20 is affixed and fixed to a predetermined position of the bottom 2b of the housing 2 after being bent by attaching a double-sided tape to the adhesive part 20b or using an adhesive. The appearance of the adhesive portion 20b after the flexible cable 20 is bent is as shown in FIG.

  The bent flexible cable 20 is composed of a housing side arm portion 20f, a crossing portion 20g, and a PUM side arm portion 20h, and a housing side conductor exposed portion 20i is provided at an end of the housing side arm portion 20f. A PUM side conductor exposed portion 20j is provided at the end of the PUM side arm portion 20h. There is a casing-side length dimension A1 including the casing-side arm part 20f and the transverse part 20g, and a PUM-side length dimension A2 including the PUM-side arm part 20h and the transverse part 20g. Further, as shown in FIG. 4B, a dimension A2 is provided so that a part of the bonding portion 20b on the surface can be seen when viewed from the side bonded to the housing after being bent. Since the flexible cable 20 tries to return to some extent by its elasticity even after being bent, this is prevented by adhering the contact surfaces after the bending with the bonding portion 20b, but this dimension A2 is ensured. As a result, since this portion can also be bonded to the housing, the flexible cable 20 can be more securely bonded to the housing 2.

  In the first embodiment, the two bent portions 20a are both mountain-folded when viewed from the surface of FIG. 3A. However, both are not in the same folding direction, and one of them is valley-folded. It may be set in consideration of workability and the like. In that case, it is desirable to prevent the folding from returning to the original by bonding a predetermined range of the surfaces that come into contact with each other by the folding. In addition, a desired range of the adhesive surface with the housing 2 is set from a range in contact with the housing 2 according to the bending method.

  Further, in order to ensure the prevention of the floating at the bent portion 20a, as shown in FIG. 5A, after the bent flexible cable 20 is attached to the housing 2, a predetermined vicinity in the vicinity of the bent portion 20a is provided. The range may be covered with tape 20n. As shown in FIG. 5 (b), a double-sided tape 20p is applied from the adhesion side to the housing 2 so as to cover a predetermined range in the vicinity of the bent portion 20a, and the adhesion of this portion is reinforced. good. Note that the housing 2 is not shown in FIG.

  Further, it is desirable that the PUM side end portion 20k of the bonding portion 20c substantially coincides with the position of the side portion 20l where the crossing portion 20g and the PUM side arm portion 20h intersect.

  Next, a configuration with the flexible cable 20 attached to the optical disc apparatus 1 will be described with reference to FIG.

The bent flexible cable 20 is bonded to the bottom 2b of the housing 2 by a part of the back surface bonding portion 20c and the front surface bonding portion 20b, but the bonding portion 20c is extended to the housing side conductor exposed portion 20i at the end. Therefore, the vicinity of the casing-side conductor exposed portion 20f of the flexible cable 20 is lifted from the casing 2 and connected to the connector 9b.

  On the other hand, the PUM side conductor exposed portion 20j of the flexible cable 20 to the PUM side end portion 20k of the bonding portion 20c are not bonded to the housing 2. The PUM side arm portion 20h extends from the crossing portion 20g bonded to the housing 2 toward the housing side circuit board 9, but is folded back by the folded portion 20m so that the PUM side conductor exposed portion 20j is the PUM side circuit board. It is connected to the connector 4d of 4c. The folded portion 20m is not folded and has a folding radius of several mm.

  FIG. 2 shows a state in which the tray 3 is pulled out from the housing 2 to the maximum extent, but when the tray 3 is moved so as to be housed in the housing 2, the folded portion 20m moves to the housing-side circuit board 9 side. A two-dot chain line in FIG. 2 indicates a movement range of the folded portion 20m, and is in a position B in the figure when the tray 3 is completely stored in the housing 2. The casing-side circuit board 9 is provided with a relief portion 9c so as not to come into contact with the folded portion 20m even when the tray 3 is completely accommodated in the casing 2. Further, even when the tray 3 is pulled out from the housing 2 to the maximum so that the folded portion 20m does not reach the transverse portion 20g, the folded portion 20m does not reach the transverse portion 20g. The attachment position and the length of the PUM side arm portion 20h are set. Similarly, in the state where the tray 3 is pulled out to the maximum extent from the housing 2, the folded portion 20m does not reach the PUM side end portion 20k of the bonding portion 20c. The position of the PUM side end portion 20k of the bonding portion 20c is set. Desirably, the PUM side end portion 20k of the bonding portion 20c is substantially matched with the position of the side portion 20l where the crossing portion 20g and the PUM side arm portion 20h intersect.

  At least in the state where the tray 3 is housed in the housing 2, the folded portion 20 m is positioned so as to be sandwiched between the back surface of the tray 3 and the bottom 2 b of the housing 2. It has a turning radius of several mm without breaking.

  When a single-sided flexible printed cable is used as the flexible cable 20, the exposed conductors at both ends are on the same side. Therefore, in the case of the first embodiment, for example, when the housing-side conductor exposed portion 20 i faces the housing 2, the PUM-side conductor exposed portion 20 j faces the tray 3. Therefore, when the connector 9b is mounted on the surface of the housing side circuit board 9 (the surface not facing the bottom 2b), the connector 9b is a lower contact type. Further, when the connector 9b is mounted on the back surface (surface facing the bottom 2b) of the housing side circuit board 9, the upper contact type connector 9b is used. Further, in this case, when the connector 4d is mounted on the front surface of the PUM side circuit board 4c (the surface not facing the back surface of the tray 3), the connector 4d uses a lower contact type. When the connector 4d is mounted on the back surface of the PUM side circuit board 4c (the surface facing the back surface of the tray 3), the connector 4d uses an upper contact type. Conversely, when the housing-side conductor exposed portion 20i faces the tray 3, the mounting method of the connectors 4d and 9b and the selection of the contact type are reversed as described above.

Since the portion where the flexible cable 20 is bent and doubled increases in thickness, the opposing through-holes including at least the doubled portion, as shown by the broken line C in FIG. You may provide in the bottom part 2b. By doing this, by dropping the portion where the thickness is doubled into the through-hole, the portion where the double is raised from the surface of the other flexible cable 20 is reduced. Can do. In addition, a sheet or a seal may be attached to the through hole from the outside of the housing to close it. By doing so, the portion of the flexible cable 20 which is doubled and thickened by the thickness of the bottom portion 2b can be dropped into the through hole, and dust or the like enters the housing 2 from the through hole. Can be prevented. The sheet or seal may be insulating or conductive. However, when the conductive sheet is used, it acts as a shield, and unnecessary radiation of the optical disk device leaks from this through hole. Can be reduced. In addition, when the dust resistance is not required, the sheet or the seal may be a conductive mesh. Further, these seals and sheets may be configured in multiple layers. Moreover, you may provide a recessed part in the housing | casing 2 instead of a through-hole. In this case, the concave portion may be formed by punching or may be formed by reducing the thickness.

  Further, in the first embodiment, it is bent twice, but it may be bent twice or more. For example, the orientation of the connector 9b can be changed by adding a single bend in the vicinity of the housing side circuit board 9 of the housing side arm portion 20f. Furthermore, by making the number of times of folding odd, the direction of the housing side conductor exposed portion 20i and the PUM side conductor exposed portion 20j can be reversed. This is effective when the contact type of the connector is limited and the housing side conductor exposed portion 20i and the PUM side conductor exposed portion 20j need to be reversed in direction.

  In the first embodiment, the case-side conductor exposed portion 20f is connected to the case-side circuit board 9, but may be directly connected or wired to an electronic component attached to the case 2. For example, the circuit of the case side circuit board 9 is mounted together with the PUM side circuit board 4c to eliminate the case side circuit board 9, and the case side conductor exposed portion 20f is connected to a connector provided in the case 2 and connected to the outside. It may be a thing.

(Embodiment 2)
6 is a front view of the optical disk device according to Embodiment 2 of the present invention with the top of the housing removed, FIG. 7 is an external view of the optical disk device according to Embodiment 2 of the present invention before bending, and FIG. FIG. 9 is an external view after bending the flexible cable of the optical disk apparatus according to Embodiment 2 of the present invention, and FIG. 9 is an external view of a state where a tape is applied after bending the flexible cable of the optical disk apparatus according to Embodiment 2 of the present invention.

  FIG. 6 shows a state in which the tray 3 is pulled out from the housing 2.

  The second embodiment is different in that the flexible cable 21 is bent once, and the configuration of the entire other optical disk apparatus is the same as that of the first embodiment. Therefore, the flexible cable 21 will be described in detail.

  The material, configuration, and shape before bending of the flexible cable 21 are the same as those of the flexible cable 20 of the first embodiment.

  As shown in FIG. 7, the flexible cable 21 is provided with a bent portion 21a, an adhesive portion 21b is provided on the front surface 21d, and an adhesive portion 21c is provided on the back surface 21e. Here, the back surface 21e is a surface of the flexible cable 21 that is mainly a bonding surface with the housing when attached to the housing, and the front surface 21d is the opposite surface. The bent portion 20a forms a crease and is bent so as not to easily return to the original state. In FIG. 7A, the bent portion 21a is bent into a valley fold to obtain a shape after bending as shown in FIG. The bending portion 21a may be previously marked for easy bending, or may be provided with a ruled line, or may be previously bent with a mold or the like. The flexible cable 21 is attached and fixed to a predetermined position of the bottom 2b of the housing 2 after being bent by attaching a double-sided tape to the adhesive portion 21b or using an adhesive. The appearance of the adhesive portion 20b after the flexible cable 21 is bent is as shown in FIG.

The bent flexible cable 21 is composed of a case side arm portion 21f and a PUM side arm portion 21h, and a case side conductor exposed portion 21i is provided at an end of the case side arm portion 21f. A PUM-side conductor exposed portion 21j is provided at the end of the arm portion 21h. The dimension B1 is the length dimension of the housing side arm part 21f, and the dimension B2 is the length dimension of the PUM side arm part 21h. Since the flexible cable 21 tries to return to some extent by its elasticity even after being bent, this is prevented by bonding the surfaces that come into contact after the bending with the bonding portion 21b.

  Further, in order to ensure the prevention of lifting at the bent portion 21a, as shown in FIG. 9A, after the bent flexible cable 21 is attached to the housing 2, a predetermined vicinity in the vicinity of the bent portion 21a is provided. The range may be covered with tape 21n. As shown in FIG. 9B, even if a predetermined range near the bent portion 20a is covered and a double-sided tape 21p is applied from the side bonded to the housing 2 to reinforce the adhesiveness of this portion. good. In FIG. 8, the housing 2 is not shown.

  The angle θ formed by the case side arm portion 21f and the PUM side arm portion 21h at the time of bending may be 0 °, that is, the case side arm portion 21f and the PUM side arm portion 21h may be overlapped without deviation. Has a certain degree of angle since the thickness of the connector 4d and 9b connected to both ends increases the possibility of contact when the tray 3 is taken in and out of the housing 2. Is desirable. Specifically, it is desirable that the housing-side conductor exposed portions 21i and the PUM-side conductor exposed portions 21j at both ends have an angle that does not overlap at least.

  Next, a configuration in a state where the flexible cable 21 is attached to the optical disc apparatus 1 will be described with reference to FIG.

  The bent flexible cable 21 is adhered to the bottom 2b of the housing 2 by a part of the adhesive portion 21c on the back surface and the adhesive portion 21b on the front surface. The adhesive portion 21c extends to the housing-side conductor exposed portion 21i at the end. Therefore, the vicinity of the casing-side conductor exposed portion 21f of the flexible cable 21 is lifted from the casing 2 and connected to the connector 9b.

  On the other hand, the PUM side conductor exposed portion 21j of the flexible cable 21 to the PUM side end portion 21k of the bonding portion 21c are not bonded to the housing 2. The PUM side arm portion 21h extends from the bent portion 21a toward the housing side circuit board 9, but is folded back at the folded portion 21m so that the PUM side conductor exposed portion 21j is connected to the connector 4d of the PUM side circuit board 4c. ing. The folded portion 21m is not folded and has a folding radius of several mm.

  By attaching the flexible cable 21 to the housing 2 so that the PUM side arm portion 21h is parallel to the direction in which the tray 3 is pulled out, the width of the folded portion 21m can be made the same as the width of the PUM side arm portion 21h. Since it can be minimized, the reaction force due to folding can be reduced. In this case, the housing-side arm portion 21f is not parallel to the pull-out direction of the tray 3, and the connector 9b is correspondingly attached to the housing-side circuit board 9 at an angle with respect to the longitudinal direction of the housing-side circuit board 9. Implemented.

FIG. 6 shows a state in which the tray 3 is pulled out from the housing 2 to the maximum extent. When the tray 3 is moved so as to be housed in the housing 2, the folded portion 21m moves to the housing-side circuit board 9 side. The two-dot chain line in FIG. 6 indicates the movement range of the folded portion 21m, and is in the position D in the figure when the tray 3 is completely stored in the housing 2. The casing-side circuit board 9 is provided with a relief portion 9c so as not to come into contact with the folded portion 21m even when the tray 3 is completely stored in the casing 2. Further, the folded portion 21m has a position where the flexible cable 21 is attached to the housing 2 and the PUM side so that the folded portion 20m does not reach the folded portion 21a even when the tray 3 is pulled out from the housing 2 to the maximum extent. The length of the arm portion 21h is set. Similarly, in the state where the tray 3 is pulled out from the housing 2 to the maximum extent, the folded portion 21m does not reach the PUM side end 21k of the adhesive portion 21c. The position of the PUM side end portion 21k of the bonding portion 21c is set.

  At least in the state where the tray 3 is housed in the housing 2, the folded portion 21 m is positioned so as to be sandwiched between the back surface of the tray 3 and the bottom 2 b of the housing 2. It has a turning radius of several mm without breaking.

  When a single-sided flexible printed cable is used for the flexible cable 21, the exposed conductors at both ends are on the same side. Therefore, in the case of the second embodiment, for example, when the housing side conductor exposed portion 21 i faces the housing 2, the PUM side conductor exposed portion 21 j faces the tray 3. Therefore, when the connector 9b is mounted on the surface of the housing side circuit board 9 (the surface not facing the bottom 2b), the connector 9b is a lower contact type. Further, when the connector 9b is mounted on the back surface (surface facing the bottom 2b) of the housing side circuit board 9, the upper contact type connector 9b is used. Further, in this case, when the connector 4d is mounted on the front surface of the PUM side circuit board 4c (the surface not facing the back surface of the tray 3), the connector 4d uses a lower contact type. When the connector 4d is mounted on the back surface of the PUM side circuit board 4c (the surface on the side facing the back surface of the tray 3), the connector 4d uses a lower contact type. On the contrary, when the housing-side conductor exposed portion 20i faces the tray 3, the mounting method of the connectors 4d and 9b and the selection of the contact type are reversed as described above.

  In the case of the second embodiment, since the number of times of bending is one, the direction of one of the conductor exposed portions can be reversed from that in the case of the first embodiment. As described above, when there is a restriction on connector selection or mounting position during product design, the connector selection or mounting is performed during product design by reversing the direction of one of the exposed conductors according to the second embodiment. In some cases, the position can be easily selected.

  Since the portion where the flexible cable 21 is folded and doubled increases in thickness, a through hole facing part or all of the doubled portion may be provided in the bottom 2b of the housing 2. . By carrying out like this, by dropping a part or all of the part which is doubled and thickened into this through-hole, it reduces that the part protrudes with respect to the surface of the other flexible cable 21 Can do. In addition, a sheet or a seal may be attached to the through hole from the outside of the housing to close it. By doing so, a portion of the flexible cable 21 that is doubled and thickened by the thickness of the bottom 2b can be dropped into the through hole, and dust or the like enters the housing 2 from the through hole. Can be prevented. The sheet or seal may be insulating or conductive. However, when the conductive sheet is used, it acts as a shield, and unnecessary radiation of the optical disk device leaks from this through hole. Can be reduced. In addition, when the dust resistance is not required, the sheet or the seal may be a conductive mesh. Further, these seals and sheets may be configured in multiple layers. Moreover, you may provide a recessed part in the housing | casing 2 instead of a through-hole. In this case, the concave portion may be formed by punching or may be formed by reducing the thickness.

  In the second embodiment, the case-side conductor exposed portion 21i is connected to the case-side circuit board 9, but may be directly connected or wired to an electronic component attached to the case 2. For example, the circuit of the case side circuit board 9 is mounted together with the PUM side circuit board 4c to eliminate the case side circuit board 9, and the case side conductor exposed portion 21i is connected to a connector provided in the case 2 and connected to the outside. It may be a thing.

  INDUSTRIAL APPLICABILITY The present invention can be used as an optical disk apparatus that records and reproduces information on an optical disk with an optical pickup, and can realize an optical disk apparatus with improved traverse seek reliability in access control.

1 is an external view of an optical disc device according to Embodiment 1 of the present invention. The front view which removed the housing | casing top part of the optical disk apparatus in Embodiment 1 of this invention 1 is an external view of a flexible cable of an optical disk device according to Embodiment 1 of the present invention before bending. External view after bending of flexible cable of optical disc apparatus in Embodiment 1 of the present invention FIG. 5 is an external view of a state in which a tape is applied after the flexible cable of the optical disk apparatus according to Embodiment 1 of the present invention is bent. The front view which removed the housing | casing top part of the optical disk apparatus in Embodiment 2 of this invention External view before bending of flexible cable of optical disk apparatus in Embodiment 2 of the present invention External view after bending of flexible cable of optical disc apparatus in Embodiment 2 of the present invention External view of a state where a tape is applied after the flexible cable of the optical disk apparatus according to Embodiment 2 of the present invention is bent. External view of a conventional tray-type optical disk device Front view of a conventional tray type optical disc apparatus

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optical disk device 2 Case 2a Top part 2b Bottom part 3 Tray 4 Optical pick-up module 4a Spindle motor 4b Disk mounting part 4c PUM side circuit board 4d Connector 5 Optical pick-up 6 Rail part 7 Rail 8 Rail guide 9 Case side circuit board 9a Connector 9b Connector 9c Escape portion 10 Flexible printed cable 10a Folded portion 20 Flexible cable 20a Bent portion 20b Adhesive portion 20c Adhesive portion 20d Front surface 20e Back surface 20f Housing side arm portion 20g Transverse portion 20h PUM side arm portion 20i Housing side conductor exposed portion 20j PUM side conductor Exposed portion 20k PUM side end portion 20l Side portion 20m Folded portion 20n Tape 20p Double-sided tape 21 Flexible cable 21a Bending portion 21b Adhesive portion 21c Adhesive portion 21f Housing side Part 21h PUM side arm portion 21i housing side conductor exposed portion 21j PUM side conductor exposed portion 21k PUM end 21m folded portion 21n tape 21p-sided tape

Claims (7)

A housing unit, a tray unit held so as to be housed and drawn out in the housing unit, a rotation driving means provided in the tray unit, an optical pickup unit provided in the tray, and the housing An optical disc apparatus including a flexible cable capable of transmitting at least one of a signal and electric power between a body part and the tray part, wherein the flexible cable has one or a plurality of bent parts. Has a first arm portion and a second arm portion, and is substantially U-shaped or substantially V-shaped in a state where the tray is stored in the housing portion by the first arm portion and the second arm portion. The optical disk is characterized in that the end of the first arm is connected to the housing, the second arm is folded back, and the end is connected to the tray. apparatus. 2. The optical disk apparatus according to claim 1, wherein the flexible cable is a flat band cable. 2. The optical disk apparatus according to claim 1, wherein the flexible cable is a flexible printed cable or a flexible flat cable. 2. The optical disk apparatus according to claim 1, wherein the flexible cable alone before being bent is in a substantially straight shape. 2. The optical disc apparatus according to claim 1, wherein at least a part of a portion where the flexible cables contact with each other in the bent portion is bonded. 2. The optical disk apparatus according to claim 1, wherein the flexible cable connects a circuit board provided in the casing and a circuit board provided in the optical pickup module. 2. The optical disc apparatus according to claim 1, wherein a portion where the thickness of the flexible cable overlaps and the thickness is increased by the bent portion is escaped to the housing, and an escape portion is provided in the housing.

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