JP5163585B2 - Disk unit - Google Patents

Description

The present invention relates to a disk device (Blu-ray Disc type recorder or player), and in particular, maintains a state in which the distance between the holder of each light emitting unit, the heat radiating side plate, and the heat radiating post plate is set to a predetermined small value. The heat dissipation efficiency of the laser diode is increased.

A disk device (Blu-ray Disc type recorder or player) is shown in the plan view of FIG. 8 and the longitudinal sectional view of FIG. This is because the disk D mounting tray 1 is arranged in a loader chassis 2 so as to be able to move forward and backward, and a traverse chassis 3 comprising a chassis main body 3a and a lever shift 3b is arranged in the loader chassis 2. The rear portion of the main body 3a is connected to the loader chassis 2 via the rear elastic body 4 made of rubber and is moved up and down c and d, and the front portion of the chassis main body 3a is connected to the lever via the front elastic body 5 made of rubber. A spindle motor 7 with a turntable 6 and an optical pickup 8 are arranged on the chassis main body 3a and connected to the shift 3b. The optical pickup 8 can slide along the guide rail 9 in the radial direction of the disk D. A slide base 10 having a base 10;
An actuator 11 with an objective lens OL and a main board 12 made of a printed wiring board are arranged on the tray facing surface.

A DVD / CD light emitting portion 14 is disposed on one side surface of the slide base 10, and
A DVD / CD reader 15 is disposed on one end of the rear surface of the slide base 10, and a light emitting unit 16 for BD (Blu-ray) is disposed on the other end of the rear surface of the slide base 10. A BD reading unit 17 is disposed on a side surface, each of the light emitting units 14 and 16 has a laser diode LD, and each of the reading units 15 and 17 has a photodiode PD (
(See FIG. 10).

As shown in FIGS. 8 and 9, a cam slider 19 is disposed at the front portion of the loader chassis 2 so as to be slidable in the left and right directions e and f perpendicular to the forward and backward a and b directions. The cam slider 20 and the lever shift 3b are formed by the cam mechanism 20 including the cam groove 20a and the cam pin 20b that is provided in the lever shift 3b and is fitted into the cam groove 20a.
And are linked together.

As shown in FIG. 8, a pinion 22 is disposed at the front portion of the loader chassis 2 so as to be able to rotate forward and backward, and a cam rack 23 that can be engaged with the pinion 22 is provided on the cam slider 19. An interlockable tray rack (not shown) is formed on the back surface of the tray 1 along the forward and backward a and b directions. A guide pin 25 projects from the cam slider 19 and engages with the guide pin 25. A possible guide frame (not shown) protrudes from the back surface of the tray 1. In FIG. 9, reference numeral 26 denotes a clamper for clamping the disk D with the turntable 6.

The operation procedure will be described. The state indicated by the solid line in FIGS. 8 and 9 indicates the tray open state, the disk D is placed on the tray 1, and the pinion 22 is moved to the arrow h by the feed motor.
By rotating in the direction, the tray 1 is moved backward through a tray rack (not shown) meshing with the pinion 22 and stored in the loader chassis 2 (see phantom lines in FIGS. 8 and 9).

Subsequently, the cam rack 23 is engaged with the pinion 22 by pressing the inclined surface of the guide frame (not shown) on the back surface of the tray 1 against the guide pin 25 and sliding the cam slider 19 in the direction of arrow e. By rotating in the direction of arrow h, the cam slider 19 is slid in the direction of arrow e, the traverse chassis 3 is moved up c via the cam mechanism 20, the disk D is clamped on the turntable 6, and the play mode is set.

In the play mode, the disk D is rotated at high speed by the turntable 6, the laser light is projected from the laser diode LD of each light emitting unit 14, 16 onto the disk D through the objective lens OL, and the reflected light is projected to each reading unit 15, 17. Received by the photodiode PD of the disk D
Read the information recorded in.

10 to 14 show a conventional optical pickup 8. FIG. 10 is a perspective view, FIG. 11 is a rear view, FIG. 12 is a rear view, and FIG. FIG. 14 is a longitudinal sectional view of the vicinity of the light emitting part 16 for the BD.

As shown in FIGS. 10 to 12, each of the light emitting portions 14 and 16 is composed of a laser diode LD fitted in a central fitting hole of a metal holder H, and the holder H is tertiary at a predetermined position of the slide base 10. A heat radiating plate 28 that is fixed by the ultraviolet curable adhesive UV in an original state and that promotes heat radiation from each of the laser diodes LD that is a heating element is provided on the slide base 10.
Is provided. Each reading unit 15 and 17 is provided with a photodiode PD.

As shown in FIGS. 10 to 12, the heat radiating plate 28 is bent from the heat radiating plate main body 28a facing the tray opposite surface 10a of the slide base 10 and one side edge of the heat radiating plate main body 28a. A heat radiating side plate 28b facing the holder H of the light emitting unit 14, and a heat radiating plate body 28a
A rear heat dissipation plate 28c that is bent from the rear edge and faces the holder H of the light emitting portion 16 for BD, and passes the terminals of the laser diode LD from the end edges of the heat dissipation side plate 28b and the rear heat dissipation plate 28c to the center thereof. A notch 29 is formed.

The procedure for attaching the heat sink 28 will be described. With the tray opposite surface 10a of the slide base 10 facing upward, the heat sink 28 is lowered from above to bring the heat sink main body 28a into contact with the tray opposite surface 10a of the slide base 10. As shown in FIG. 13, the heat radiating side plate 28b is brought close to the holder H of the DVD / CD light emitting unit 14 at a predetermined interval t1, and the holder H of the BD light emitting unit 16 is brought into contact as shown in FIG. The heat radiating plate 28c is moved closer to the slide base 10 with screws 30 and the heat radiating grease G is interposed between the holders H and the heat radiating plate 28.

In the above-described configuration, the holder H, the heat radiating side plate 28b, and the heat radiating rear plate 28 of each light-emitting portion 14, 16
The distances t1 and t2 from c are set to be as small as about 0.1 to 0.2 mm, for example, and heat is radiated from the laser diode LD to the heat radiating plate 28 via the holder H and the heat radiating grease G. In addition, there exists what was described in patent document 1 as a related technique.

JP 2008-257831 A

In the above configuration, even if the intervals t1 and t2 between the holders H of the light emitting units 14 and 16 and the heat radiating side plates 28b and the heat radiating post plates 28c are once set as prescribed, The spacing t1, t2 is likely to vary due to a slight movement of the heat sink main body 28a. For this reason, the intervals t1 and t2 become too large and the heat dissipation performance deteriorates, or the intervals t1 and t2
If the value of the heat dissipation side plate 28b and / or the post heat dissipation plate 28c come into contact with the holder H, the position of the laser diode LD may be shifted.

In view of the above-described conventional drawbacks, the present invention maintains the state in which the distance between the holder of each light emitting unit, the heat radiation side plate and the heat radiation back plate is set to a predetermined small value to increase the heat radiation efficiency of the laser diode. The object is to provide a disk device.

In order to achieve the above object, according to the first aspect of the present invention, there is provided a disk high-speed rotation turn in a traverse chassis in which a disk mounting tray is disposed so as to be able to move back and forth in the loader chassis. A table and an optical pickup for laser light projection are arranged, the optical pickup has a slide base capable of reciprocating along the radial direction of the disc, and a DVD / CD light emitting part is arranged on one side of the slide base. In addition, a light emitting part for BD is arranged on the rear surface of the slide base, and each light emitting part is composed of a laser diode fitted in a central fitting hole of a metal holder fixed to the slide base, A heat radiating plate comprising a heat radiating side plate bent from one side edge of the plate main body and a heat radiating rear plate bent from the rear edge of the heat radiating plate main body. The heat radiating plate is fixed to the slide base in a state where the heat radiating side plate is brought close to the holder of the DVD / CD light emitting portion and the post heat radiating plate is brought close to the holder of the light emitting portion for BD. And a pair of positioning rods projecting from the slide base at a predetermined interval, and facing the positioning rods in a pair. The long holes are penetrated in the heat sink main body along the transverse direction parallel to the post-heat dissipation plate, and the edge close to the heat dissipation side plate of each long hole is used as a positioning edge. The post-heat dissipating plate is positioned at a predetermined interval on the holder of the light emitting part for BD by being fitted to each other, and the heat dissipating plate is moved along each positioning rod so that the positioning edge of each long hole is set to each positioning rod. By abutting The heat radiation side plate is positioned at a predetermined interval on the holder of the light emitting unit for DVD / CD, and detent means for maintaining the state in which the positioning edge of each long hole is in contact with each positioning rod includes a heat radiation plate, a slide base, It is characterized by being provided between.

According to a second aspect of the present invention, in the first aspect of the present invention, the detent means includes a detent projection protruding from the slide base, and a heat sink main body facing the detent projection. The inner edge far from the heat-dissipating side plate of the notch is the positioning inner edge, and when the positioning edge of each slot is brought into contact with each positioning rod, the notch The notch is fitted to the detent protrusion and the positioning inner edge of the notch is brought into contact with the detent protrusion.

According to a third aspect of the present invention, in the first aspect of the present invention, the detent means is formed in the heat sink main body so as to be opposed to the detent recess formed in the slide base and facing the detent recess. The outer edge close to the heat dissipation side plate of the protrusion is the positioning outer edge, and the protrusion is detented when the positioning edge of each slot is brought into contact with each positioning rod. It is characterized in that it is fitted into the recess so that the positioning outer edge of the projection comes into contact with the inner edge of the detent recess.

According to the first aspect of the present invention, after the pair of elongated holes penetrating the heat sink main body is fitted to the positioning rods protruding from the slide base, the heat sink is moved along the positioning rods. The positioning edge of each elongated hole is brought into contact with each positioning rod, and the contact state is maintained by a detent means, thereby providing a predetermined distance between the holder of each light emitting unit and the heat radiation side plate and the heat radiation rear plate. It is possible to prevent the position of the laser diode from deviating due to variations in the spacing and the deterioration of the heat radiation performance, and the heat radiation side plate and / or the heat radiation plate contacting the holder.

According to the second aspect of the present invention, the notch portion of the heat sink main body is fitted to the detent projection portion of the slide base, and the positioning inner edge of the notch portion is brought into contact with the detent projection portion. Thus, it is possible to prevent the interval between the holder of the DVD / CD light emitting unit and the heat dissipation side plate from being expanded from the set state, thereby preventing the deterioration of the heat dissipation performance.

According to the invention described in claim 3, by inserting the convex portion of the heat sink main body into the detent concave portion of the slide base and bringing the positioning outer edge of the convex portion into contact with the inner edge of the detent concave portion,
It is possible to prevent the interval between the holder of the DVD / CD light emitting unit and the heat dissipation side plate from expanding from the set state, thereby preventing deterioration of the heat dissipation performance.

It is a perspective view of the principal part of the disc apparatus which is one Embodiment of this invention. It is a reverse view of the principal part. It is a rear view of the principal part. It is a partial expansion exploded perspective view of the principal part. (A) And (b) is the elements on larger scale of the principal part which show the attachment procedure of the heat sink. It is a partial expansion exploded perspective view of the important section of the disc device which is other embodiments of the present invention. (A) And (b) is the elements on larger scale of the principal part which show the attachment procedure of the heat sink. It is a top view of a disk device. It is the longitudinal cross-sectional view. It is a perspective view which shows the principal part of a prior art example. FIG. It is the same rear view. It is a cross-sectional view near the light emitting part for the DVD / CD. It is a longitudinal cross-sectional view of the light emitting part for the BD.

1 to 5 show a main part of a disk device (Blu-ray Disc type recorder or player) according to an embodiment of the present invention. A predetermined interval is provided on the tray opposite surface 10a of the slide base 10. FIG. In addition, a pair of cylindrical positioning rods 32 project, and a pair of long holes 33 face the positioning rods 32 and penetrate the heat radiating plate body 28a along the transverse direction X parallel to the post-heat radiating plate 28c. The end edge close to the heat radiation side plate 28b of each long hole 33 is the positioning edge 3
3a. In FIG. 4, 34 is a screw hole formed in the tray opposite surface 10a of the slide base 10, and 35 is a long hole screw insertion hole penetrating the heat sink main body 28a. Since the configuration other than the above is substantially the same as the configuration shown in FIGS. 8 to 14, the same parts are denoted by the same reference numerals and the description thereof is omitted.

In the above configuration, as shown in FIG. 5A, the long holes 33 are fitted into the positioning rods 32 so that the post-heat dissipating plate 28c is spaced from the holder H of the BD light emitting section 16 by a predetermined interval t2. Positioned in the approaching state (FIG. 14), from this state, as shown in FIG.
8 is moved in the direction of the arrow k along each positioning rod 32, and the positioning edge 33a of each long hole 33 is moved.
Are brought into contact with the positioning rods 32 so that the heat radiating side plate 28b becomes the light emitting part 1 for DVD / CD.
4 is positioned in an approaching state with a predetermined interval t1 (see FIG. 13).

A detent means 36 is provided for maintaining the positioning state, which is shown in FIG.
As shown in FIG. 4, a rectangular detent protrusion 37 projecting from the tray opposite surface 10a of the slide base 10 and a rectangular cut formed on the front edge of the heat sink main body 28a opposite the detent protrusion 37. The inner edge of the notch 38 that is remote from the heat radiation side plate 28b is a positioning inner surface 38a.

5B, when the positioning edge 33a of each elongated hole 33 is brought into contact with each positioning rod 32, the notch 38 is fitted to the detent projection 37. Then, the positioning inner side surface 38a of the notch 38 is brought into contact with the detent projection 37, and the screw 30 is screwed into the screw hole 34 through the screw insertion hole 35, whereby the heat radiating plate 28 is moved to the slide base 10.
Secure to.

According to the above configuration, the intervals t1 and t2 (see FIGS. 13 and 14) vary as in the conventional case, and the heat dissipation performance deteriorates, or the heat dissipation side plate 28b and / or the heat dissipation rear plate 28c come into contact with the holder H so that the laser diode. The position of the LD can be prevented from shifting, and the state where the distances t1 and t2 are set to a predetermined small value such as about 0.1 to 0.2 mm can be maintained.

Further, by fitting the notch portion 38 of the heat sink main body 28 a to the detent projection 37 of the slide base 10 and bringing the positioning inner side surface 38 a of the notch 38 into contact with the detent projection 37, It is possible to prevent the interval t1 between the holder H of the DVD / CD light emitting unit 14 and the heat radiation side plate 28b from expanding from the set state, thereby preventing deterioration of heat radiation performance.

6 and 7 show a disk device (Blu-ray Disc) according to another embodiment of the present invention.
c-type recorder or player), the detent means 36 is provided with a detent recess 40 formed in the tray opposite surface 10a of the slide base 10 and a detent recess 40 facing the detent recess 40. The protrusion 41 is formed by half punching at the front end edge of the heat sink main body 28a, and the outer edge of the protrusion 41 close to the heat dissipation side plate 28b is the positioning outer edge 41a. Since the configuration other than the above is substantially the same as the configuration shown in FIGS. 1 to 5, the same parts are denoted by the same reference numerals and the description thereof is omitted.

In the above-described configuration, as shown in FIG. 7A, by fitting the long holes 33 to the positioning rods 32, the post-heat dissipating plate 28c is spaced from the holder H of the BD light emitting section 16 with a predetermined interval t2. Positioning is performed in the approaching state (FIG. 14), and from this state, as shown in FIG.
Is moved in the direction of the arrow k along each positioning rod 32 to bring the positioning edge 33a of each elongated hole 33 into contact with each positioning rod 32, whereby the heat radiation side plate 28b is moved to the DVD / CD light-emitting portion 14.
Is positioned in an approaching state with a predetermined interval t1 (see FIG. 13).

Subsequently, as shown in FIG. 7B, the convex portion 41 is fitted into the detent concave portion 40, the positioning outer edge 41a of the convex portion 41 is brought into contact with the inner edge of the detent concave portion 40, and the screw 30 Is screwed into the screw hole 34 through the screw insertion hole 35, thereby fixing the heat radiating plate 28 to the slide base 10.

According to the said structure, the substantially same effect as one Embodiment shown in FIGS. 1-5 can be acquired,
In particular, the convex portion 41 of the heat sink main body 28 a is fitted into the detent recess 40 of the slide base 10, and the positioning outer edge 41 a of the convex portion 41 is brought into contact with the inner edge of the detent recess 40. It is possible to prevent the interval t1 between the holder H of the CD light emitting unit 14 and the heat radiation side plate 28b from expanding from the set state, thereby preventing deterioration of the heat radiation performance.

DESCRIPTION OF SYMBOLS 1 Tray 2 Loader chassis 3 Traverse chassis 6 Turntable 8 Optical pickup 10 Slide base 14 DVD / CD light emitting part 15 DVD / CD reading part 16 BD light emitting part 17 BD reading part 28 Heat radiation plate 28a Heat radiation plate body 28b Heat radiation Side plate 28c After heat dissipation plate 32 Positioning rod 33 Long hole 33a Positioning edge of long hole 36 Detent means 37 Detent protrusion 38 Notch portion 38a Positioning inner surface of notch portion 40 Detent concave portion 41 Convex portion 41a Convex portion Positioning outer edge D Disk H Holder LD Laser diode G Heat dissipation grease

Claims (3)

A disk mounting tray is disposed on the loader chassis so as to be movable back and forth, and a turntable for high-speed disk rotation and an optical pickup for laser light projection are disposed on a traverse chassis disposed on the loader chassis so as to be movable up and down. Has a slide base capable of reciprocating along the radial direction of the disc, and a DVD / CD is provided on one side of the slide base.
And a light emitting part for BD, a light emitting part for BD is arranged on the rear surface of the slide base, each light emitting part is composed of a laser diode fitted in a central fitting hole of a metal holder fixed to the slide base, A heat dissipation plate comprising a heat dissipation plate main body, a heat dissipation side plate bent from one side edge of the heat dissipation plate main body, and a heat dissipation rear plate bent from the rear edge of the heat dissipation plate main body; The heat sink main body is fastened to the slide base in a state in which the heat dissipation plate is brought close to the holder of the light emitting portion and the light emitting portion for BD is brought close to the holder of the light emitting portion for BD, and between the heat dissipation side plate and the heat dissipation post plate and each holder. In the disk device in which heat dissipation grease is interposed, a pair of positioning rods project from the slide base at a predetermined interval, and the pair of long holes are parallel to the post-heat dissipation plate facing the positioning rods. The end plate near the heat-dissipating side plate of each long hole is provided as a positioning end edge, and is inserted into the heat-radiating plate body along the cutting direction. Is positioned at a predetermined interval on the holder of the light emitting part for BD, and the heat radiating plate is moved along each positioning rod so that the positioning edge of each long hole is brought into contact with each positioning rod, whereby each heat radiating side plate is A detent means positioned between the holder of the DVD / CD light emitting section at a predetermined interval and maintaining the positioning edge of each elongated hole in contact with each positioning rod is provided between the heat sink and the slide base. A disk device characterized by being provided. The detent means comprises a detent projection protruding from the slide base and a notch formed in the heat sink body facing the detent projection, from the heat dissipation side plate of the notch The far inner edge is the positioning inner edge, and when the positioning edge of each slot is brought into contact with each positioning rod, the notch is fitted to the detent protrusion and the notch 2. The disk apparatus according to claim 1, wherein the positioning inner edge is brought into contact with the detent protrusion. The detent means comprises a detent recess formed in the slide base and a convex portion formed on the heat sink main body facing the detent recess, and the outer edge of the convex portion near the heat radiating side plate is When the positioning edge of each elongated hole is brought into contact with each positioning rod, the convex portion is fitted into the detent concave portion, and the positioning outer edge of the convex portion is set to the detent concave portion. 2. The disk device according to claim 1, wherein the disk device is brought into contact with an inner edge.

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