JP5624827B2 - Disk unit - Google Patents

Description

  The present invention relates to a disk device that reproduces and / or records information on a disk such as a CD or DVD, and more particularly, to a dustproof structure for preventing dust from entering a unit chassis incorporating a drive unit. Is.

  In a disk device that is used by loading a disk such as a CD or DVD, a drive unit equipped with a disk rotation drive mechanism, an optical pickup, etc. is built in a box-shaped unit chassis. A cable (hereinafter abbreviated as FPC) is drawn out of the unit chassis. When this type of disk device is incorporated in a car navigation device or the like for use in a vehicle, the unit chassis is housed in a housing together with a circuit board to which an FPC is connected by a connector. An operation panel having a display screen or the like is attached. The disc insertion slot provided in the operation panel is opposed to the disc insertion slot provided in the unit chassis, and the disc is inserted into the drive unit and the disc is ejected from the drive unit through the disc insertion slot. It has come to be.

  By the way, when this type of disk device is used in a dusty environment for a long period of time, dust adheres to the objective lens of the optical pickup, the recording surface of the disk, etc., and a signal reading error occurs. Malfunctions such as dust adhering to the roller and idling easily occur. Therefore, conventionally, a disk device has been proposed in which the unit chassis is housed in a bracket that also serves as a dust-proof case, and this bracket is incorporated into the housing to prevent dust from entering the unit chassis (for example, patents). Reference 1). In such a conventional example, the unit chassis is covered with a dust-proof case such as a bracket, but the circuit board on which an IC or the like serving as a heat source is mounted outside the dust-proof case inside the case. Heat can be radiated through the formed numerous openings without any trouble. Further, since the FPC that electrically connects the drive unit and the circuit board is loosely inserted into the through hole of the bracket, a gap is generated around the FPC in this through hole. The bracket is subjected to a dustproof treatment such as fitting rubber into the gap or covering the gap with a shielding material. Such dust-proofing treatment can be omitted if it is formed as a slit having a size substantially equal to the cross-sectional shape of the FPC so that the FPC can be inserted through the through-hole of the bracket with almost no gap. Since the risk of damaging the FPC due to burrs at the periphery of the through-hole formed by processing increases, the conduction reliability of the FPC is significantly reduced.

  Also, as a dust-proof measure at the disc insertion slot, a soft wiping sheet made of felt or the like is attached to the disc guide member integrated with the operation panel to cover the disc insertion portion, and this disc insertion portion is inserted into the disc of the unit chassis. The technique of facing the mouth is widely adopted. This disc guide member is a member that corrects the tilt of the disc during insertion / ejection by a guide wall that surrounds the disc insertion portion. Then, attach the two wiping sheets so that the disc insertion part is closed, and insert and eject the disc while pushing both sheets open. The possibility of intrusion is reduced, and dust adhering to the disk can be removed with a wiping sheet.

JP-A-10-208461

  As in the conventional example disclosed in Patent Document 1, when the unit chassis is incorporated in the housing via a bracket that also serves as a dust-proof case, the adverse effect of dust does not easily reach the drive unit in the unit chassis. It becomes easy to improve the reliability of the device and extend the service life. However, in such a conventional example, it is necessary to close the through-hole of the bracket with an auxiliary member such as rubber or a shielding material after inserting the FPC, and this dust-proof treatment increases the number of parts and the number of assembly steps. There was a problem of being disadvantaged. Further, when the through hole is formed as a slit having a size substantially equal to the cross-sectional shape of the FPC in order to omit the dustproof treatment using the auxiliary member, the FPC is damaged by the burr of the through hole as described above. Therefore, the conduction reliability is significantly lowered.

  The present invention has been made in view of the actual situation of the prior art, and an object of the present invention is to provide a disk device capable of omitting a dustproof treatment for a bracket that also serves as a dustproof case of a unit chassis in which a drive unit is built. It is in.

  In order to achieve the above object, the present invention includes a unit chassis in which a drive unit is built, a bracket provided with a through-hole for housing the unit chassis and allowing a flexible cable led out from the drive unit to be loosely inserted therein; A circuit board electrically connected to the drive unit via the flexible cable; a casing housing the unit chassis, bracket and circuit board; an operation panel mounted on the front surface of the casing; In a disk device comprising a synthetic resin disk guide member provided with a disk insertion portion at a position facing the disk insertion port of the unit chassis, the disk guide member is attached to the bracket, and the disk guide member is Provided at a position covering the through hole And a cable insertion hole that is provided in the shielding part and protrudes from the through hole, and the cable insertion hole is formed as a slit having a size substantially equal to the cross-sectional shape of the flexible cable. In addition, the flexible cable is configured to pass through the through hole and the cable insertion hole and be connected to the circuit board.

  In this way, a synthetic resin disc guide member having a disc insertion portion is provided with a shielding portion and a cable insertion hole in advance, and the disc guide member is attached to a bracket that also serves as a dustproof case. If the cable insertion hole is exposed to the through-hole while being covered by the shielding part, the FPC led out from the drive unit is loosely inserted into the through-hole to avoid interference with the burr while the FPC is connected to the cable. It can be inserted through the insertion hole with almost no gap and pulled out of the bracket. Further, since the through hole of the bracket is covered with the shielding portion of the disk guide member, it is not necessary to use a dust-proof auxiliary member separately to close the gap of the through hole.

  In the above configuration, if the shielding portion of the disc guide member has a projection that penetrates the through-hole of the bracket and protrudes to the inside, the FPC led out from the drive unit penetrates the bracket so as to straddle the projection. Since it is loosely inserted into the hole, it is possible to more reliably prevent the FPC from contacting the burr on the periphery of the through hole, which is preferable.

  Further, in the above configuration, the outer wall surface of the shielding portion of the disk guide member is provided with a cable restricting wall that extends substantially in parallel with an interval substantially equal to the width dimension of the flexible cable, and is provided through the cable insertion hole. Thus, it is preferable that the flexible cable drawn out of the bracket is regulated in the width direction by the cable regulating wall, because it is possible to suppress the FPC wobble that is a concern during assembly. In other words, the FPC drawn out of the bracket during assembly usually fluctuates in an unstable manner, but if the position of this FPC is regulated in the width direction by the cable regulating wall of the disk guide member, the posture becomes stable. Subsequent assembly work can be performed smoothly.

  According to the disk device of the present invention, the shielding part and the cable insertion hole are provided in the synthetic resin disk guide member attached to the bracket for housing the unit chassis, and the through hole of the bracket is covered by the shielding part. Since the cable insertion hole protrudes from the through hole, the FPC led out from the drive unit is loosely inserted into the through hole to avoid interference with the burr, and the FPC is inserted into the cable insertion hole with almost no gap. Can be pulled out of the bracket. Therefore, it is not necessary to separately use a dust-proof auxiliary member to close the gap in the through hole of the bracket, and the dust-proofing process for the bracket can be omitted, so that the cost can be reduced. Further, since the disk guide member is made of synthetic resin, it is easy to form the cable insertion hole in a slit shape having a size substantially equal to the cross-sectional shape of the FPC, and therefore from the gap between the cable insertion hole and the FPC. The possibility of dust intrusion can be almost eliminated.

1 is a perspective view showing an external appearance of a disk device according to an embodiment of the present invention. It is sectional drawing for demonstrating the dustproof structure of this disk apparatus. It is a disassembled perspective view of the principal part of this disc apparatus. It is a principal part top view of the disc guide member with which this disc apparatus is provided. It is a principal part bottom view of this disk guide member.

  Hereinafter, exemplary embodiments of the present invention will be described with reference to FIGS. The disk device according to the present embodiment is an in-vehicle disk device that is used in a car navigation device, for example, and has an appearance as shown in FIG. This disk device includes a unit chassis 2 in which a drive unit 1 (see FIG. 3) is built, a bracket 3 that houses the unit chassis 2, and an FPC that is led out of the drive unit 1 directly or via a unit board (not shown). (Flexible cable) A circuit board 4 to which a connector 8 is connected, a housing 5 (see FIG. 1) housing these unit chassis 2, bracket 3, circuit board 4, and the like, and a front surface of the housing 5 The operation panel 6 and the disc guide member 7 attached to the front portion of the bracket 3 are mainly configured. The disk device is installed and used at a predetermined position such as a dashboard in the vehicle interior. At this time, only the operation panel 6 is exposed in the vehicle interior, and the housing 5 is positioned at a predetermined position such as the dashboard. It is to be buried.

  The housing 5 is formed in a box shape by combining a lower chassis 10, an upper chassis 11, a cover 12, a front chassis 13, and a rear chassis (not shown). The unit chassis 2 is covered with a bracket 3 and a cover 12, and the bracket 3 and the cover 12 constitute a dustproof case that prevents intrusion of dust from the outside. On the other hand, the circuit board 4 on which an IC or the like as a heat source is mounted is installed outside the dust-proof case (below the bracket 3) in the housing 5, and the housing 5 has a large number of openings. Therefore, the heat generated from the circuit board 4 can be radiated to the outside without any trouble through these openings. As shown in FIG. 3, in the present embodiment, two FPCs 8 are led out from the drive unit 1, so one FPC 8 is attached to one of the plurality of circuit boards 4 installed in the housing 5. The other FPC 8 is connected to another circuit board 4 by a connector.

  The drive unit 1 is equipped with a disk rotation drive mechanism, an optical pickup, a disk transport mechanism, and the like. When a disk is loaded in the drive unit 1, the disk clamped by the turntable and the clamp member of the disk rotation drive mechanism is rotated, and the information recorded on the disk is read by the optical pickup. Yes. Further, a horizontally long disk insertion slot 2a is opened at the front of the unit chassis 2 in which the drive unit 1 is built.

  The bracket 3 is manufactured by pressing a metal plate. A through hole 3 b (see FIG. 2) is formed in the front portion of the bottom plate 3 a of the bracket 3, and the FPC 8 led out from the drive unit 1 is loosely inserted into the through hole 3 b and drawn out of the bracket 3. Although one through hole 3b is shown in FIG. 2, since two FPCs 8 are used in this embodiment as described above, another through hole (not shown) is formed in the bracket 3. Has been. In addition, a notch 3 d is provided on the upper portion of the front plate 3 c of the bracket 3, and this notch 3 d faces the disc insertion opening 2 a of the unit chassis 2.

  The disk guide member 7 is a molded product made of synthetic resin, and has a horizontally long disk insertion portion 7b surrounded by a guide wall 7a. The disc guide member 7 is fitted to the bracket 3 which is a dustproof case and the front portion of the cover 12, and the disc insertion portion 7 b faces the disc insertion port 2 a of the unit chassis 2. The bottom plate of the disk guide member 7 includes a shielding portion 7c that covers the through hole 3b of the bracket 3 from below, a cable insertion hole 7d that is formed in a slit shape across the shielding portion 7c and protrudes from the through hole 3b, and a shield. A protrusion 7e that is formed in a jetty shape on the upper surface of the portion 7c and penetrates the through hole 3b, and a cable regulating wall 7f (see FIG. 5) that is formed in a jetty shape on the left and right ends of the lower surface of the shielding portion 7c are provided. ing. In this embodiment, since two FPCs 8 are used, although not shown, the shielding part 7c, the cable insertion hole 7d, the protruding part 7e, the cable regulating wall 7f, etc. are provided for each corresponding FPC 8. ing.

  The shielding part 7c is formed in a terrace shape in which the area between the cable insertion hole 7d and the protrusion 7e is slightly lowered, and the cable insertion hole 7d extends along the stepped part (see FIG. 2). The cable insertion hole 7d is formed as a slit having a size substantially equal to the cross-sectional shape of the corresponding FPC 8, and the FPC 8 led out from the drive unit 1 and loosely inserted into the through hole 3b passes through the cable insertion hole 7d and is a bracket. 3 is pulled out. Since the cable insertion hole 7d protrudes to the stepped portion of the shielding part 7c, it is easy to insert the FPC 8 into the cable insertion hole 7d from the through hole 3b side of the bracket 3. Further, as shown in FIGS. 2 and 4, the protrusion 7e extends substantially parallel to the cable insertion hole 7d and protrudes into the bracket 3 in a state of being in close contact with the rear end edge of the through hole 3b. The FPC 8 led out from the drive unit 1 is loosely inserted into the through hole 3b so as to straddle the protrusion 7e. The cable restricting wall 7f extends substantially at right angles to the cable insertion hole 7d, and the distance between the paired cable restricting walls 7f is set to be substantially the same as the width dimension of the corresponding FPC 8, so that during assembly, The FPC 8 inserted through the cable insertion hole 7d and drawn out of the bracket 3 is regulated in the width direction by the pair of cable regulating walls 7f.

  The operation panel 6 is provided with a display screen 6a such as a liquid crystal display and various operation knobs 6b. In addition, a disk insertion slot 6 c to which a soft wiping sheet 9 made of felt or the like (see FIG. 2) is attached is formed at the upper part of the operation panel 6, and this disk insertion slot 6 c is a disk of the disk guide member 7. It faces the disc insertion slot 2a of the unit chassis 2 through the insertion portion 7b. A disc such as a CD or a DVD is inserted into the drive unit 1 through the disc insertion openings 6c and 2a and the disc insertion portion 7b, and is ejected from the drive unit 1. In addition, since the two wiping sheets 9 are attached so as to close the disk insertion opening 6c and the both sheets 9 are pushed open, the disk is inserted and ejected. The possibility of dust entering the apparatus from the disk insertion opening 6c is low, and the dust adhering to the disk can be removed by the wiping sheet 9.

  Thus, in the disk device according to the present embodiment, the disk guide member 7 having the disk insertion part 7b is provided with the shielding part 7c and the cable insertion hole 7d, and the disk guide member 7 is a bracket 3 which is a dustproof case. By attaching to the front part of the cover 12, the through hole 3b of the bracket 3 is covered with the shielding part 7c, and the cable insertion hole 7d is exposed to the through hole 3b. Therefore, the FPC 8 led out from the drive unit 1 can be inserted into the through hole 3b to avoid interference with burrs, and the FPC 8 can be inserted into the cable insertion hole 7d with almost no gap and pulled out of the bracket 3. Therefore, the FPC 8 can be pulled out without difficulty to the circuit board 4 installed outside the dustproof case in the housing 5. Further, the internal space of the bracket 3 and the cover 12 which are dust-proof cases is entirely covered with a metal plate except for the notch 3d and the through hole 3b, and the disc insertion portion 7b from which the notch 3d protrudes. Since the wiping sheet 9 is disposed in front and the through hole 3b is covered with the shielding portion 7c, the drive unit 1 in the unit chassis 2 has a dust-proof structure that is not easily affected by dust. Moreover, the dust-proof means constituted by the shielding portion 7c and the like is provided in the disc guide member 7, and it is not necessary to separately use a dust-proof auxiliary member to close the gap in the through hole 3b. Is advantageous in terms of cost. Further, since the disk guide member 7 is made of synthetic resin, it is easy to form the cable insertion hole 7d in a slit shape having a size substantially equal to the cross-sectional shape of the FPC 8, and therefore, between the cable insertion hole 7d and the FPC 8 The possibility of dust entering through the gaps can be almost eliminated.

  Further, in the disk device according to the present embodiment, a protrusion 7 e that penetrates the through hole 3 b and protrudes into the bracket 3 is provided on the upper surface of the shielding part 7 c of the disk guide member 7, and is led out from the drive unit 1. The FPC 8 is loosely inserted into the through hole 3b so as to straddle the protrusion 7e. Therefore, there is no possibility that the FPC 8 contacts the burr on the periphery of the through hole 3b, and damage to the FPC 8 due to the burr can be avoided reliably.

  Further, in the disk device according to the present embodiment, the cable regulating wall 7f that extends substantially in parallel to the lower surface (outer wall surface) of the shielding portion 7c of the disk guide member 7 with an interval substantially equal to the width dimension of the FPC 8. The FPC 8 drawn out to the outside of the bracket 3 through the cable insertion hole 7d is regulated in position in the width direction by these cable regulating walls 7f. Can be suppressed. That is, the FPC 8 drawn out of the bracket 3 during assembly of the disk device usually fluctuates in an unstable manner. However, if the position of the FPC 8 is restricted in the width direction by the cable restriction wall 7f of the disk guide member 7, Since the posture of the FPC 8 drawn out of the bracket 3 is stable, the subsequent assembly work including connector connection and the like can be performed smoothly, and improvement in workability can be expected.

  In the above embodiment, since the through hole 3b for loosely inserting the FPC 8 and pulling it out is formed in the bottom plate 3a of the bracket 3, the dust-proof shielding part 7c, the cable insertion hole 7d, etc. are connected to the disk guide. Although provided in the bottom plate of the member 7, the through hole 3 b may be formed in the side plate of the bracket 3, and in that case, the shielding portion 7 c and the cable insertion hole 7 d are also provided in the side plate of the disk guide member 7. That's fine.

  In the above embodiment, the disk device using two FPCs 8 has been described. Needless to say, the present invention can be applied to cases where only one FPC is derived from the drive unit or three or more FPCs are used. Further, the FPC 8 is not limited to a flexible printed circuit board, and may be a flexible flat cable called an FPC. Furthermore, if the present invention is applied to a disk device that is not used for in-vehicle use but is used in a dusty environment, substantially the same effect as the above embodiment can be obtained.

1 drive unit 2 unit chassis 2a, 6c disk insertion slot 3 bracket (dust-proof case)
3b Through-hole 4 Circuit board 5 Housing 6 Operation panel 7 Disc guide member 7b Disc insertion portion 7c Shielding portion 7d Cable insertion hole 7e Projection portion 7f Cable restriction wall 8 FPC (flexible cable)
9 Wiping sheet 12 Cover (dust-proof case)

Claims (3)

A unit chassis in which the drive unit is built, a bracket in which the unit chassis is accommodated and a through-hole for loosely inserting a flexible cable led out from the drive unit is provided, and electrically connected to the drive unit via the flexible cable A circuit board, a housing housing the unit chassis, brackets and circuit board, an operation panel mounted on the front of the housing, and a disk insertion at a position facing the disk insertion slot of the unit chassis. In a disc device comprising a disc guide member made of synthetic resin provided with a portion,
The disc guide member is attached to the bracket, and the disc guide member is provided with a shielding portion provided at a position covering the through hole, and a cable insertion hole provided at the shielding portion and protruding to the through hole. And the cable insertion hole is formed as a slit having a size substantially equal to the cross-sectional shape of the flexible cable, and the flexible cable passes through the through hole and the cable insertion hole, and the circuit board. A disk device characterized by being connected to the disk.   2. The disk device according to claim 1, wherein a projection that penetrates the through hole and protrudes into the bracket is provided in the shielding portion.   3. The cable restricting wall according to claim 1, wherein a cable regulating wall is provided on the outer wall surface of the shielding portion so as to extend substantially in parallel with an interval substantially equal to a width dimension of the flexible cable. The disk device is characterized in that the position of the flexible cable drawn out to the outside of the bracket is regulated in the width direction by the cable regulating wall.

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