JP2002324390A - Disk drive device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid the occurrence of the electrostatic discharge damage of a device by connecting an earth terminal in the device which is used for control of a spindle motor, a pickup device, etc., and is weak for static electricity to a base frame so as not to produce static electricity on the device. SOLUTION: This drive has a base unit chassis 21 provided with a spindle motor 23 so that an optical disk D is removably mounted and rotationally driven, and an optical pickup device 25 to record and reproduce an information signal on the optical disk D which is movably supported on the base unit chassis 21 and mounted on a turntable 24 to be rotationally driven. Further, this drive is provided with a base frame 94 consisting of an electrical conductor to support the base unit chassis 21, a base unit cover 100 consisting of an electrical conductor covering the base unit chassis 21 to prevent the static electricity charged on the base unit chassis 21, and a clip 104 and a lead wire 107 for connecting a base unit cover 100 and the base frame 94 to run the static electricity charged on the base unit cover 100 to the base frame 94.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to rotating a disk-shaped recording medium, such as an optical disk, a magneto-optical disk, or a magnetic disk, and recording and / or recording of a pickup device along an information recording surface of the disk-shaped recording medium. The present invention relates to a disk drive device for recording (writing) and / or reproducing (reading) an information signal by moving a reproducing head.

[0002]

2. Description of the Related Art Conventionally, optical disks such as CDs (compact disks) and CD-ROMs (read only memories), magneto-optical disks such as MDs (mini disks), magnetic disks such as FDs (floppy disks), and the like have been generally used. 2. Description of the Related Art A disk drive device is provided as a device for recording and / or reproducing information signals using a disk-shaped recording medium. As such a disk drive device, for example, one having a configuration as shown in FIG. 38 is known.

In this disk drive device, an optical disk is horizontally mounted on a turntable attached to a rotating shaft of a spindle motor and driven to rotate, and laser light is recorded on the optical disk by an optical head of an optical pickup device. Irradiation on the surface. Then, the optical head is moved radially outward from the center of the optical disk, and the optical head writes an information signal on the information recording surface or reads out an information signal recorded on the information recording surface in advance to obtain the information. Recording and / or reproduction.

The disk drive 1 includes a base unit chassis 2, a spindle motor 3, a turntable 4, an optical pickup device 5, a feed screw shaft 6, a feed motor 7, and the like. The base unit chassis 2 is made of a thin rectangular metal plate, and has a rectangular opening 8. A spindle motor 3 is mounted on one lower surface in the longitudinal direction of the base unit chassis 2 in a state where the rotation shaft is projected upward.
A turntable 4 on which an optical disc is mounted is fixed to a rotating shaft of the spindle motor 3.

The base unit chassis 2 is provided with two guide shafts 9 parallel to each other so as to straddle the opening 8 with a predetermined gap. A slide member 10 of the optical pickup device 5 is slidably supported on these guide shafts 9 and 9. The slide member 10 is provided with a feed nut, and the feed nut is engaged with the feed screw shaft 6. The feed screw shaft 6
Both ends are rotatably supported by the base unit chassis 2 via a pair of bearing pieces 11a and 11b. Further, a driven pulley 12 is fixed to the feed screw shaft 6, and one end of an endlessly continuous rubber belt 13 is hung on the driven pulley 12. The other end of the rubber belt 13 is hung on a drive pulley 14 fixed to a rotation shaft of the feed motor 7. The feed motor 7 is fixed to the base unit chassis 2 by fixing means such as fixing screws.

[0006]

However, in the conventional disk drive device 1 having such a configuration, the base unit chassis 2 is formed of a sheet metal such as stainless steel, which is an electric conductor, so that it is resistant to static electricity. There was little need to take special measures. That is, the base unit chassis 2 on which the spindle motor 3 and the optical pickup device 5 are supported is attached to a housing or the like using fixing means such as metal fixing screws. can do. Therefore, even when the static electricity acts on the base unit chassis 2, the static electricity can easily flow to the outside to prevent the base unit chassis 2 from being charged.

On the other hand, in recent years, a reduction in size and weight of this type of disk drive device has been demanded, and in order to achieve this, engineering plastics that are easy to reduce in weight and the like have come to be used frequently. Was. As such an engineering plastic, for example, polyphenylene ether containing glass fiber (PP
E) and the like. This glass fiber filled PP
E is relatively light and has high strength, but has the property of being easily charged with static electricity. Therefore, when a disk drive device is formed using a material having such static electricity characteristics, it is necessary to take a countermeasure against static electricity, which has not been a problem in the conventional disk drive device.

In general, in this type of disk drive, a large number of electronic components and electrical elements such as a Hall element and a laser diode are used. For example, a Hall element is used in connection with the spindle motor 3, and
A laser diode, a laser driver IC, and the like are used in connection with the optical pickup device 5. In this case, a Hall element used for controlling the spindle motor 3 is mounted on a predetermined wiring board and arranged near the spindle motor 3, and a laser diode or a laser driver used for controlling the optical pickup device 5. The IC and the like are mounted on a predetermined wiring board and attached to the slide member 10.

[0009] Devices such as Hall elements and laser diodes used in this way have poor durability against static electricity, and when static electricity exceeding an allowable level is applied, the static electricity causes electrostatic breakdown. Therefore, if the base unit chassis is made of a material that easily charges static electricity, the static electricity charged in the base unit chassis tends to fly to the device, and there is a problem that the static electricity may damage the device.

The present invention has been made in view of such conventional problems, and grounds a device which is weak in static electricity used for controlling a spindle motor, a pickup device and the like to a base frame, and discharges static electricity to the device. The purpose is to avoid electrostatic discharge of the device to be used by avoiding flying.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and the like and to achieve the above object, a disk drive device according to the present invention is provided with a disk which is detachably mounted on a disk-shaped recording medium and is driven to rotate. A base unit chassis to which a rotation mechanism is attached, and recording and / or reproduction of information signals on a disk-shaped recording medium movably supported by the base unit chassis and mounted on and rotated by a disk rotation mechanism. A pickup device,
A base frame made of an electric conductor supporting the base unit chassis, a base unit cover made of an electric conductor covering the base unit chassis and preventing the base unit chassis from being charged with static electricity, and the base unit cover and the base Ground means for connecting the frame to the base unit cover and flowing static electricity charged on the base unit cover to the base frame.

With the above-described configuration, the disk drive device of the present invention has a configuration in which the base unit chassis, the pickup device, the base frame, the base unit cover, and the grounding means are provided, so that the base unit cover is charged. Static electricity can flow to the base frame via the grounding means, and it is possible to prevent electronic components and electric elements from being electrostatically damaged by the static electricity.

[0013]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 37 show an embodiment of the disk drive device according to the present invention. 1 is a perspective view of one embodiment of a disk drive assembly according to a disk drive device as viewed from above, FIG. 2 is a plan view of the disk drive assembly, FIG. 3 is a front view, FIG. 4 is a bottom view, and FIG. 4
FIG. 6 is an enlarged explanatory view showing a main part from which a base unit sub-chassis is removed, FIG. 6 is a bottom view showing a motor base plate removed from FIG. 4, FIG. 7 is a rear view showing a cross section of the main part, and FIG. 2, FIG. 9 is a sectional view taken along line XX of FIG. 2, FIG. 10 is a left side view, FIG. 11 is a sectional view taken along line YY of FIG. 2, and FIG. 13 is a plan view of FIG. 2 with the base unit chassis removed, and FIG. 14 is a front view showing the spindle motor and the optical pickup device of FIG.

FIG. 15 to FIG. 22 show a first embodiment of the disk drive device of the present invention. That is, FIG.
5A and 5B are a plan view and a partially sectional front view showing a first embodiment of a base unit cover according to a disk drive device, and FIGS. 16A to 16E are views showing a first embodiment of ground means of the disk drive device. FIG. 17 is a front perspective view, a rear perspective view, a front view, a left side view, and a bottom view showing the clip. FIG. 17 is a plan view showing the disk drive assembly shown in FIG. 1 with the base unit cover shown in FIG. 19 is a front view, FIG. 19 is a bottom view, FIGS. 20A and 20B are a rear view and an exploded rear view with a partial cross section, FIG.
22B and 22B are a left side view and an exploded left side view, respectively, and FIGS. 22A to 22C are a plan view, a front view, and a left side view of the disk drive assembly with the base unit cover shown in FIG. .

FIG. 23 to FIG. 28 show a second embodiment of the disk drive device of the present invention. That is, FIG.
3A to 3C are a plan view, a front view, and a left side view showing a second embodiment of the base unit cover according to the disk drive device. FIG. 24 shows the disk drive assembly shown in FIG. 1 with the base unit cover shown in FIG. FIG. 25 is a front view, FIG. 26 is a bottom view, FIG. 27 is a rear view in which a part thereof is similarly cut, and FIGS.
FIG. 3 is a plan view, a front view, and a left side view of a disk drive assembly with the base unit cover shown in FIG.

FIGS. 29 to 34 show a third embodiment of the disk drive device of the present invention. That is, FIG.
9A to 9C are a plan view, a front view, and a left side view showing a third embodiment of the base unit cover according to the disk drive device. FIG. 30 is a perspective view showing the disk drive assembly shown in FIG. FIG. 31 is a front view, FIG. 32 is a bottom view, FIG. 33 is a rear view of the same part, and FIGS. 34A to 34C are FIGS.
FIG. 3 is a plan view, a front view, and a left side view of a disk drive assembly with the base unit cover shown in FIG.

FIG. 35 is a side view showing a digital video disk camera using the disk drive device of the present invention, FIG. 36 is a plan view thereof, and FIG. 37 is an exploded perspective view thereof.

The disk drive of the present invention comprises a disk drive assembly, a base unit cover, and a base frame. That is, in FIGS. 1 to 37 showing the embodiment of the present invention, FIGS.
22 show a first embodiment of the disk drive device of the present invention, FIGS. 1 to 14 and FIGS. 23 to 28 show a second embodiment of the disk drive device of the present invention, and FIGS. 14 and FIGS. 29 to 34 show a third embodiment of the disk drive device of the present invention. First, a disk drive assembly according to the disk drive of the present invention will be described.

The disk drive assembly 20 according to the disk drive apparatus of the present invention has a disk-shaped recording medium in which music signals such as audio information, video signals such as video information, and information signals such as music signals are recorded in advance. Use a dedicated optical disc or a recordable optical disc D in which information signals such as audio information and video information can be recorded only once (write-once type) or can be repeatedly recorded many times (rewritable type). be able to. However, the disk-shaped recording medium is not limited to this, and it is formed in the same manner as a magnetic disk in which a magnetic thin film layer is formed on the surface of a thin disk to store information according to the magnetization state at a specific position. Of course, a magneto-optical disk or other storage medium in which information is written and read using an optical head and a magnetic head on the magnetic thin film layer can be applied.

The disk drive assembly 20 is shown in FIG.
As shown in FIG. 4, a base unit chassis 21, a base unit sub-chassis 22, and a spindle motor 23
, A turntable 24, an optical pickup device 25, a feed screw shaft 26, a feed motor 27, and the like. The base unit chassis 21 includes a flat planar portion 2.
1a, a front wall portion 21b, a rear wall portion 21c, and left and right side wall portions 21d and 21e provided so as to protrude to the lower surface side along an outer peripheral edge so as to surround the periphery of the flat portion 21a. It is shaped like a shallow lid.

As shown in FIGS. 1 and 2, a substantially rectangular head opening 28 extending in the left-right direction is provided at a substantially central portion of the flat portion 21 a of the base unit chassis 21. Further, the head opening 28 of the flat surface 21a is formed.
Is provided with a circular through-hole 29 at one end in the longitudinal direction. A rectangular spring opening 30 also extending in the left-right direction is provided on the back side of the flat portion 21a, which is one of the directions intersecting the longitudinal direction of the head opening 28. As shown in FIGS. 5 and 6, on the lower surface of the base unit chassis 21, a U-shaped inner wall portion 31 to which the spindle motor 23 is attached, and a motor housing portion 32 for housing the feed motor 27 and the like. And a sub-guide shaft 33 on the rear side.

The inner wall 31 of the base unit chassis 21
Are formed so as to overlap the lower surface of the through hole 29. The inner wall 31 has an inner peripheral wall 31a formed so as to surround half of the outer peripheral surface of the spindle motor 23 at an inner peripheral edge opposite to the opening 28, and an opening is formed continuously at both ends of the inner peripheral wall 31a. The air passage walls 31b extend parallel to each other and extend toward the side 28. An inner wall portion 31 having the inner peripheral wall 31a and the wind passage walls 31b, 31b.
Thus, an air passage 35 is formed which guides the wind generated by sucking and discharging air based on the rotation of fins and the like, which will be described later, and blows and cools the optical pickup device 25 and the like as a heating element.

As shown in FIG. 6, the inner wall 31 has three support projections 37a, 37b, 37 for supporting a motor base plate 36 to which the spindle motor 23 is fixed.
and two positioning projections 38a and 38b for positioning the motor base plate 36 at a predetermined position in the planar direction. The first support projection 37a is provided on the inner wall 31.
Is set at a portion where the front end edge of the inner peripheral wall 31a and the wind passage wall 31b on the front side are continuous. This first support projection 3
A first positioning projection 38a is integrally provided at the center of 7a. Then, the second and third support projections 37
Screw holes are provided in the center portions of b and 37c, respectively.

Further, a second positioning projection 38b is disposed on the opposite side of the first positioning projection 38a across the through hole 29. A third support projection 37c is arranged on the side of the wind passage wall 31b of the second positioning projection 38b. The second support protrusion 37b is disposed at a position where a line extending in a direction orthogonal to a middle part between the first positioning protrusion 38a and the second positioning protrusion 38b intersects the inner wall 31. These second and third support projections 37
As shown in FIGS. 7 and 11, a coil spring 39 is loosely fitted to each of b and 37c. The motor base plate 36 is attached via these coil springs 39 so that the posture can be changed.

The motor base plate 36 is made of a thin plate made of sheet metal, and is thereby made elastically deformable as a whole. As a material of the motor base plate 36, a metal that easily conducts electricity, for example, stainless steel,
Steel or the like is preferred. At the center of the motor base plate 36, a fitting hole 36a into which the fixed portion 23a of the spindle motor 23 is fitted is provided. Further, the motor base plate 36 has first and second positioning projections 38a.
And 38b are provided with first and second positioning holes. Then, the second and third support projections 37
At positions corresponding to b and 37c, insertion holes into which the screw portions of the adjustment screw 40 are inserted are provided.

As shown in FIGS. 7 and 11, the spindle motor 23 includes a fixed portion 23a fitted and fixed to a motor base plate 36, and a rotating portion 23b rotatably supported by the fixed portion 23a. It is composed of The fixed portion 23a of the spindle motor 23 has, for example, a cylindrical bearing sleeve, a bearing fitted and fixed inside the bearing sleeve, an iron core fitted and fixed outside the bearing sleeve, and the like. The iron core has a plurality of core portions provided at equal angular intervals in a circumferential direction, and a predetermined number of windings are wound around each core portion.

The rotating part 23 of the spindle motor 23
“b” has, for example, a rotating shaft rotatably supported by bearings of the fixed portion 23a, and a cylindrical and ring-shaped rotor integrally fixed by press-fitting the rotating shaft. On the inner peripheral surface of the rotor, a ring-shaped rotation driving magnet is adhered and fixed by a fixing means such as an adhesive. The magnet has a number of poles corresponding to the number of core portions of the iron core, and is magnetized in multiple poles in the circumferential direction. For example, when the number of cores is nine, the number of poles of the magnet is 12 (the number of poles of the magnet = the number of cores × 4/3). However, the spindle motor 23 is not limited to such a configuration.

The rotating part 23b of the spindle motor 23
A turntable 24 is fitted to a rotating shaft 23c provided at the center of the unit by a fixing means such as press-fitting and is integrally formed. The turntable 24 has a fitting portion 24a fitted into the center hole of the optical disc D, a placing portion 24b continuous with the lower end of the fitting portion 24a, and on which the optical disc D is placed. The optical disc D has a plurality of lock claws 24c for locking the center hole of the optical disk D mounted on the mounting portion 24b to prevent the optical disk D from coming out. The diameter of the fitting portion 24a of the turntable 24 is slightly smaller than the inner diameter of the center hole of the optical disc D, and can be inserted into and removed from the center hole.

The fitting portion 24a of the turntable 24
, Three lock claws 24c are arranged at equal angular intervals in the circumferential direction. Each lock claw 24c is constantly urged radially outward by an elastic body such as a coil spring (otherwise, a leaf spring, a rubber-like elastic body, or the like can be applied). That is, the distal ends of the three lock claws 24c are fitted with the fitting portions 2 so that the peripheral edge of the center hole of the optical disc D can be locked.
4a project outward from the outer peripheral surface of the optical disk 4a by an appropriate amount.
Is chucked. On the other hand, three lock claws 24c
Of the optical disk D by the lock claws 24c can be released by pushing the members into the fitting portions 24a against the urging forces of the elastic bodies.

In order to facilitate the operation of chucking and releasing the optical disk D, each lock claw 24c is provided.
Each of the upper and lower surfaces of the distal end portion is provided with an inclined portion having an appropriate size. According to the turntable 24, the optical disk D is chucked by the action of the three lock claws 24c, and is integrally rotated in this state. On the other hand, for example, by causing the optical disk D to be tilted obliquely and retracting the lock claw 24 with the force to escape from the center hole, the chucking state can be released and the optical disk D can be easily removed. .

The mounting portion 24b of the turntable 24 is provided with a disk support surface 24d formed of a rubber-like elastic material or plastic having a large frictional resistance. The disk support surface 24d receives the pressing force of the three lock claws 24c to elastically support the periphery of the center hole and prevent slipping, and rotates the optical disk D integrally with the turntable 24. Work to make it work.

The turntable 2 having such a configuration
A plurality of fins 42 are integrally provided on the lower surface of 4. As shown in FIGS. 6 and 7, the fins 42 extend radially outward from the outer peripheral surface of the ring-shaped cylindrical body 44. In this embodiment, the fins 42 are 8
The number of fins may be seven or less, or nine or more. This fin 42
Are formed integrally with the turntable 24, so that the rotation of the turntable 24 simultaneously rotates the fins 42. The inner wall portion 31 is set so as to surround the fins 42, and one of the air passages 35 is on the air suction side, and the other is on the wind discharge side.

The electric circuit of the spindle motor 23 for rotatingly driving the turntable 24 having the fins 42 is formed on a printed circuit board (not shown) mounted on a motor base plate 36. On this printed wiring board, a hall element, a connector, other electric elements, and electronic components are mounted, and one end of the flexible wiring 45 is connected to the connector. The other end of the flexible wiring 45 is led out from the side and connected to a power supply circuit (not shown) or the like.

[0034] As shown in FIGS. 5, 9 and 12, the motor housing portion 32 of the base unit chassis 21 includes a horizontal partition wall 46 which extends parallel to the outer surface 21b ₁ of the front wall portion 21b, a side A vertical partition wall 47 is provided inside the wall portion 21d and extends in a direction orthogonal to the horizontal partition wall 46. Furthermore, the front wall portion 21b, an inner surface portion 21b ₂ constituting a parallel to the outer surface portion 21b _1, the inner surface portion 21b ₂ and the outer surface portion 21
and a lateral surface portion 21b ₃ for connecting the b _1. The outer surface portion 21b ₁ and the horizontal surface part 21b ₃ and transverse partition walls 46 and the longitudinal partition wall 47 and enclosed by the space portion of the square there is a motor housing portion 32.

The feed motor 27 has a motor body 27a elongated in the axial direction, and a rotating shaft 27b rotatably supported by the motor body 27a. The motor main body 27a has a two-plane width portion in which two portions on the outer peripheral surface are cut out in parallel with each other. This motor body 27a
By sandwiching press-fitted between the two surface width portion and the outer surface portion 21b ₁ of the transverse partition wall 46, press-fitted feed motor 27 is inserted into the space of the motor housing portion 32 provided in the base unit chassis 21 Have been. This feed motor 2
The rotation shaft 27b of the motor 7 protrudes from one end in the axial direction of the motor main body 27a, and a bearing protruding like a neck on the protruding side is a motor bearing 27c.

Further, the rotation shaft 27b of the feed motor 27 is
It passes through a notch 47 a provided in the vertical partition wall 47. An output gear 48 and a rotating plate 51 are attached to the protruding portion of the rotating shaft 27b.
b is integrally driven to rotate. In the rotating plate 51,
A number of radially extending slits are provided at equal angular intervals in the circumferential direction. The rotation plate 51 and the detection sensor 52 constitute a rotation speed detector 50. The rotation number detector 50 detects the rotation angle and the rotation number of the feed motor 27, and the detection sensor 52 is attached to the inner surface of the side wall 21d. That is, the mounting protrusion 53 for mounting the detection sensor 52 is provided on the inner surface of the side wall portion 21d.
Is provided.

The detection sensor 52 has a slit-shaped notch groove 52a into which a part of the rotary plate 51 is inserted. On both sides of the notch groove 52a of the detection sensor 52,
The light emitting element and the light receiving element are built in such that they face each other. The light emitted from the light emitting element is received by the light receiving element through the slit of the rotating plate 51, and the number of times light is shielded by the light shielding portion between the slits is measured by the detection sensor 52. By measuring the number of times of light blocking, the rotation angle detector 50 can detect the rotation angle and the rotation speed of the rotation shaft 27b of the feed motor 27.

As shown in FIGS. 5 and 11, the detection sensor 52 is provided with a fitting hole 52b into which the mounting projection 53 is fitted. By fitting the mounting projection 53 into the fitting hole 52b, the detection sensor 52 is fixed to the base unit chassis 21. In order to prevent the detection sensor 52 from being rotationally displaced about the mounting projection 53, a base 78 is provided on the base unit chassis 21 as shown in FIG. By mounting the detection sensor 52 on the cradle 78, the fitting hole 52b is
3 in the height direction. Accordingly, by applying a lateral force while the detection sensor 52 is placed on the receiving table 78, the fitting hole 52b can be easily fitted to the mounting projection 53.

A drive gear 54 is meshed with an output gear 48 fixed to the rotation shaft 27b of the feed motor 27. The driving gear 54 is fixed to the feed screw shaft 26 by a fixing means such as press-fitting and is provided integrally. The feed screw shaft 26 is formed to be slightly longer than the length of the feed motor 27 in the axial direction, and a screw portion 26a formed longer than the motor main body 27a and a shaft portion 26b continuous on both sides of the screw portion 26a. , 26c. The drive gear 54 is fitted on the screw portion 26a side of the shaft portion 26c.

The one shaft portion 26b of the feed screw shaft 26 is rotatably supported is engaged with the first bearing portion 55a of the U-shaped provided laterally face 21b ₃ of the base unit chassis 21. The other shaft portion 26c of the feed screw shaft 26 is rotatably supported by being engaged with a U-shaped first bearing portion 55b provided on a side wall portion 21d of the base unit chassis 21. The first bearing portions 55a and 55b are each provided with a shaft 2.
6b and the shaft portion 26c are engaged with each other, so that the feed screw shaft 26 is arranged in a stacked state so as to be overlapped below the feed motor 27. At this time, the drive gear 54 is meshed with the output gear 48. Then, the outer surface portion 21b ₁ of the base unit chassis 21, an opening window 56a is provided to expose a part of the drive gear 54.

The screw portion 26a of the feed screw shaft 26 includes
Triangular teeth having a triangular cross section are provided so as to be spirally continuous in the axial direction. One of the guide shafts 6 is provided inside the feed screw shaft 26 so that the axis is parallel.
0 is arranged. Both ends of the guide shaft 60 are provided on a pair of second bearing portions 57 a, 5 provided on a side portion of the inner surface portion 21 b ₂ of the base unit chassis 21 and the vertical partition wall 47.
7b. Second bearing part 57
Reference numerals a and 57b denote concave portions cut out in a U-shape, and are provided so as to face each other so that the guide shaft 60 can be taken in and out.

The guide shaft 60 is formed of a round bar-shaped member having a smooth outer peripheral surface, and is slidably inserted into a slide member of the optical pickup device 25, which is a specific example of the pickup device. The sub-guide shaft 33, which is the other guide shaft that forms a pair with the guide shaft 60, is provided on the back surface of the base unit chassis 21, as shown in FIGS.

The sub guide shaft 33 is attached to the rear wall 21c.
And a rod-shaped member integrally formed with the rear wall portion 21c by a connecting portion 33a extending laterally. The sub-guide shaft 33 is provided so as to be parallel to the guide shaft 60, and the screw portion 26a of the feed screw shaft 26 is provided.
It is set to approximately the same length as. This sub guide shaft 33
And the guide shaft 60, the optical pickup device 25
Can be approached and separated from the turntable 24 within a predetermined range.

The optical pickup device 25 includes a guide shaft 60 and a sub-guide shaft 3 as shown in FIGS.
The slide member 61 is guided by the slide member 3, and an optical pickup 62 mounted on the slide member 61 and reciprocated is provided.

The slide member 61 is large enough to span between the guide shaft 60 and the sub-guide shaft 33, and is formed in a block shape to increase rigidity.
One side of the slide member 61 is provided with a pair of bearings 61a, 61a in the left-right direction.
a is provided with a hole penetrating in the lateral direction. Sleeves 63 are fitted into the holes of the bearings 61a, 61a, respectively, and the guide shaft 60 is slidably inserted through the sleeves 63.

On the other side of the slide member 61, there is provided a bearing 61b protruding to the rear side. The bearing 61b is provided with a bearing groove 64 opened on the back side. The sub guide shaft 33 is slidably engaged with the bearing groove 64. Further, as shown in FIGS. 6 and 7, a leaf spring 65 is attached to the bearing portion 61b by an attachment screw and a nut 66 which show a specific example of the fixing means.

This leaf spring 65 is for absorbing the backlash generated between the bearing groove 64 and the sub guide shaft 33.
There is a pressing piece 65a pressed against the upper surface of the sub guide shaft 33. By pressing the pressing piece 65 a against the upper surface of the sub guide shaft 33, the lower surface of the bearing groove 64 is pressed against the lower surface of the sub guide shaft 33. As a result, the play between the bearing groove 64 and the sub guide shaft 33 is absorbed, and the sliding operation can be performed while maintaining the posture of the slide member 61 constant.

The left and right bearings 61 of the slide member 61
A feed nut 67 is mounted between the a and 61a. The feed nut 67 is connected to the screw 2 of the feed screw shaft 26.
It has a nut portion 68 to be engaged with 6a, and a support 69 formed of a plate-like spring material for elastically supporting the nut portion 68. The support 69 has an elastic piece 69a for elastically supporting the nut 68 and a position detecting piece 69b for detecting the position of the slide member 61. The support 69 is screwed by a fixing screw 58a on the lower surface between the left and right bearings 61a of the slide member 61. An elastic piece 69a protrudes outside the fixed portion of the support 69, and the position detecting piece 6
9b is projected.

As shown in FIG. 5, FIG. 8 and FIG. 14, the elastic piece 69a of the support 69 is bent upward at an intermediate portion, extends laterally from the bent portion to the distal end side, and extends at the distal end. The nut 68 is fixed. Further, the position detecting piece 69b is bent upward in the middle, and the elastic piece 69b is provided on the tip side from the bent part.
Like a, it extends in the lateral direction, and its tip protrudes toward the spindle motor 23 to serve as a detection unit.

A nut portion 68 of the feed nut 67 has two engaging teeth 68a projecting outward and being parallel to each other.
68a are provided. Two engagement teeth 68a, 68a
Are engaged so as to sandwich the thread of the screw portion 26a of the feed screw shaft 26 from both sides, and are formed to be inclined at a predetermined angle in accordance with the lead of the screw portion 26a. The feed screw shaft 26 is assembled so as to overlap the feed motor 27 by pressing the two engagement teeth 68a, 68a against the screw portion 26a from the inside by the spring force of the elastic piece 69a.

In such an assembled state, as shown in FIG. 4, the base unit sub-chassis 22 is overlapped so as to cover the motor housing 32. Then, the base unit sub-chassis 22 is attached to and fixed to the base unit chassis 21 by four mounting screws 58b. At this time, as shown in FIG. 5 and FIG.
The feed screw shaft 26 and the guide shaft 60 are respectively restrained by the base unit sub-chassis 22, and the first bearing portions 55a, 55b and the second bearing portions 57a, 57, respectively.
7b.

The base unit sub-chassis 22 is shown in FIG.
As shown in FIGS. 9 to 12, the above-described lower surface portion 22 a that covers the motor housing portion 32, a front wall portion 22 b that is continuous on the front side of the lower surface portion 22 a, and a side wall that is also continuous on the side surface side And a portion 22c. The side wall portion 22c is provided with a pressing piece 77 for pressing one end of the feed screw shaft 26 in the axial direction. The pressing piece 77 always urges the feed screw shaft 26 to one side in the axial direction to absorb backlash generated in the axial direction, and the rotation angle and the number of rotations of the feed motor 27 are accurately transmitted to the feed screw shaft 26. Like that. Further, the drive gear 5 is provided on the base unit sub-chassis 22.
An opening window 56b is provided for avoiding interference with the fourth window.

The above-described feed screw shaft 26 and feed motor 27
, The output gear 48, the drive gear 54, and the feed nut 67 constitute a head feed mechanism. The operation of the head feed mechanism causes the optical pickup device 25 to reciprocate so as to approach or separate from the turntable 24.

The optical pickup 62 of the optical pickup device 25 includes an optical head 62a having a biaxial actuator for causing the objective lens 70 to face the information recording surface of the optical disk D, and recording and reproduction of information signals via the optical head 62a. And an optical control unit 62b having a photoelectric conversion element and the like.

As shown in FIGS. 12 and 13, most of the optical head 62a is covered by a head cover 71, and an objective lens 70 is exposed from an opening 72 provided in the head cover 71. The optical pickup 62 is electrically connected to an upper printed wiring board 73a mounted on the upper surface of the slide member 61. The upper printed wiring board 73a is electrically connected to the lower printed wiring board 73b by flexible wiring,
The lower printed wiring board 73b is attached to the lower surface of the slide member 61.

Upper and lower printed wiring boards 73a, 73b
Are used for drive control of the optical pickup 62, and include a laser driver IC, a connector and other electric elements,
Electronic components are mounted. Around the slide member 61, a laser diode, a light receiving element, a connector, other electric elements, and electronic components constituting a part of the optical pickup device 25 are attached. The circuit on the printed wiring board is directly connected to the circuit or the connector 74.
One end of the flexible wiring 75 is indirectly connected via the like. The other end of the flexible wiring 75 is
As shown in the figure, the lead is drawn out from the side and connected to a power supply circuit or the like (not shown).

As shown in FIG. 13, the motor base plate 36 is provided with a position detection sensor 76 for detecting a state in which the slide member 61 has approached a predetermined position. The position detection sensor 76 is provided with a slit-shaped detection unit 76a. When the above-described position detection piece 69b of the support 69 enters the detection unit 76a,
The state where the slide member 61 is closest to the turntable 24 can be known. By detecting the slide member 61 with the position detection sensor 76, the movement of the head feed mechanism inward in the disk radial direction is stopped. The inner stop position is the initial setting position of the optical pickup device 25.

The above-described base unit chassis 21, base unit sub-chassis 22, turntable 24,
As the material of the fins 42, the output gear 48 and the drive gear 54, for example, ABS resin, polyacetal (PO
M), polycarbonate (PC), PP with glass fiber
E and other various engineering plastics can be used, but aluminum alloys and other metals can also be used. Further, as the material of the slide member 61, for example, an aluminum alloy, a magnesium alloy, and other metals are suitable. Further, as a material of the guide shaft 60, the leaf spring 65, and the support 69, for example, stainless steel or another metal is preferable, but engineering plastic can also be applied.

The disk drive assembly 20 having the above-described configuration can be easily assembled, for example, as follows. This disk drive assembly 20
Is performed with the base unit chassis 21 turned upside down. In this case, the spindle motor 2
3, the feed motor 27 and the optical pickup device 25
A predetermined partial assembly is completed in advance. That is,
The spindle motor 23 is mounted on a motor base plate 36 in advance, and its rotating part 23b has a turntable 24
Is attached. Further, the rotation shaft 27 of the feed motor 27
The output gear 48 and the rotating plate 51 are attached to b. The optical pickup 6 is provided on the slide member 61.
2 is mounted, and the feed nut 67 and the leaf spring 65 are also attached.

First, the feed motor 27 is inserted into the motor housing portion 32 of the base unit chassis 21 turned upside down, and the motor main body 27a is attached to the outer surface portion 21b _{1 of the} front wall portion 21b.
And the horizontal partition wall 46. Then, the motor bearing 27 c of the feed motor 27 is inserted into the notch 47 a of the vertical partition wall 47.

Next, the detection sensor 52 connected to the feed motor 27 by the flexible wiring 75a branched from the flexible wiring 75 is mounted at a predetermined position in the motor housing 32. That is, the engagement hole 52b of the detection sensor 52 is fitted into the mounting projection 53 provided on the inner surface of the side wall 21d. Thereby, the assembly of the detection sensor 52 is completed. At this time, a part of the rotary plate 51 attached to the rotary shaft 27b enters into the notch groove 52a of the detection sensor 52.

Next, the feed screw shaft 26 to which the drive gear 54 is attached is overlapped on the feed motor 27, and the shaft portions 26b and 26c at both ends are connected to the first bearing portion 55.
a, 55b. Thereby, the feed screw shaft 26
Is completed. At this time, the driving gear 54 is necessarily meshed with the output gear 48.

Next, the spindle motor assembly is assembled. First, the coil spring 39 is fitted into the second and third support projections 37b, 37c, respectively. Next, the turntable 24 is inserted into the through hole 29 of the base unit chassis 21, and the first and second positioning projections 38a, 38b are connected to the two positioning holes 36b, 36c of the motor base plate 36.
To fit. Then, the shaft portions of the first and second adjusting screws 40a and 40b are respectively inserted into the first and second holes of the motor base plate 36, and the respective tips are screwed into the screw holes and temporarily fixed.

Next, the optical pickup device 25 is assembled. First, the guide shaft 60 is inserted into the sleeve 63 of the pair of bearings 61a and 61b provided on one side of the slide member 61. Next, with the objective lens 70 facing the opening 28 of the base unit chassis 21,
The bearing groove 64 of the bearing portion 61b provided on the other side is fitted into the sub-guide shaft 33 provided on the back side of the base unit chassis 21. At this time, the pressing piece 65a of the leaf spring 65 is pressed against the lower surface of the sub guide shaft 33, and the sub guide shaft 33 is held by the spring force of the pressing piece 65a.

From this state, the slide member 61 is rotated toward the base unit chassis 21 and the slide member 61 is rotated.
Both ends of the guide shaft 60 held on one side are fitted into the second bearing portions 57a and 57b, respectively. At this time, the nut portion 68 of the feed nut 67 attached to the slide member 61 is engaged with the screw portion 26a of the feed screw shaft 26.

Next, the base unit sub-chassis 22 is overlaid on the base unit chassis 21 so as to cover the motor housing 32. Then, a predetermined number of mounting screws 5
8b, the base unit sub-chassis 22 is fastened and fixed to the base unit chassis 21. Thus, the assembling work of the disk drive assembly 20 is completed.

As described above, according to this embodiment, after assembling the feed motor 27, the detection sensor 52, the feed screw shaft 26, and the guide shaft 60 sequentially, the base unit sub-chassis 22 is overlaid on the base unit chassis 21. By matching, the feed motor 27 and the detection sensor 5
2. The feed screw shaft 26 and the guide shaft 60 can be set at predetermined positions. By screwing only the base unit sub-chassis 22, the feed motor 2
Individual components such as 7 can be fixed to the base unit chassis 21 without screwing. Therefore, the assemblability of this type of apparatus can be improved, and the productivity can be improved.

A base unit cover is attached to the disk drive assembly 20 described above. The first embodiment of the base unit cover according to the present invention is shown in FIG.
It has a configuration as shown in FIGS. That is, the base unit cover 100 has an upper surface portion 100a that can cover the upper surface of the disk drive assembly 20, and a side surface portion 100b that covers the outer periphery of the upper surface portion 100a over the entire circumference. The upper surface portion 100 a has a shape corresponding to the upper surface shape of the disk drive assembly 20, and has a circular through hole 101 at a position corresponding to the turntable 24, and corresponds to the objective lens 70 of the optical pickup 62. A through hole 102 having a predetermined width is provided at a position where the hole 102 extends.

The through hole 10 of the base unit cover 100
1 is formed slightly larger than the diameter of the turntable 24, and the mounting portion 24b of the turntable 24 is penetrated during assembly. Also, the base unit cover 10
The zero through-hole 102 is formed to be slightly wider than the width of the objective lens 70 of the optical head 62a, and extends so as to overlap the movement locus of the objective lens 70. Further, a plurality of (three in this embodiment) through holes 103 are provided in the upper surface portion 100a for fixing the base unit cover 100 to the base unit chassis 21. A counterbore portion 103a for accommodating the head of the fixing screw is provided at a peripheral portion of each insertion hole 103.

The base unit cover 100 having such a configuration covers the upper surface of the disk drive assembly 20 to prevent dust and dirt from adhering thereto, and to prevent the electronic components mounted on the above-described printed wiring board and the like. And has a role of protecting the electric elements from static electricity. Therefore, as the material of the base unit cover 100, a metal such as stainless steel or steel made of an electric conductor having excellent conductivity is preferable, but a composite material having conductivity (for example, a conductive metal fiber Etc.) can also be applied.

In the first embodiment, a clip 104 is provided as a first specific example of the grounding means in order to establish conduction between the base unit cover 100 and the motor base plate 36. The clip 104 has a configuration as shown in FIGS. That is, the clip 104 is provided with a first holding portion 105 for holding a predetermined position of the base unit chassis 21 and a second holding portion 106 for holding the motor base plate 36. As the material of the clip 104, a metal such as stainless steel or steel, which is made of an electric conductor having an appropriate strength of elasticity and excellent conductivity, is preferable, but a composite material or other material having conductivity is preferable. Can be used.

The first holding portion 105 of the clip 104
A pair of first holding pieces 105 installed to face each other
a and 105b, and a first connecting piece 105c for connecting the two holding pieces 105a and 105b. By forming a U-shaped frame with these, elasticity of appropriate strength is given. One holding piece 1 of the first holding portion 105
05a is integrally provided with a contact piece 105d protruding laterally. The contact piece 105d is
Is formed so that it is slightly bent at the connection portion with the tip and the tip portion projects obliquely upward. This contact piece 105
The tip of d is pressed against the inner surface of the base unit cover 100.

The second holding portion 106 of the clip 104
A pair of second holding pieces 106 installed to face each other
a and 106b, and a second connecting piece 106c for connecting the two holding pieces 106a and 106b.
Is narrowed to form a wedge-shaped frame, thereby providing elasticity of a strength necessary for clamping the motor base plate 36. One holding piece 106a of the second holding portion 106 is formed continuously and integrally so as to overlap with the holding piece 105b of the first holding portion 105. Therefore, the opening of the second holding portion 106 is
It is opened in the same direction as.

Further, a fixing portion 106d is provided on the other holding piece 106b of the second holding portion 106 so as to protrude on the opposite side to the connecting piece 106c. The fixing portion 106d has a holding hole 106e for holding the solder. By engaging the distal end of the lead wire 107 with the holding hole 106e and holding it with solder, the lead wire 107 can be securely joined as shown in FIG. 16E. As a material of the clip 104, for example, a copper alloy plate spring material, which is an electric conductor containing copper, is preferable, but a metal or other material made of another conductor may be used. Of course.

In order to attach the clip 104 to the base unit chassis 21, the base unit chassis 2
A clip mounting portion 108 to which the clip 104 is mounted is provided at a portion corresponding to the portion 1. The clip mounting portion 108 is the first portion of the clip 104 mounted here.
Of the holding portion 105, that is, the first and second holding pieces 1
This is to prevent the surfaces of the base pieces 05a, 105b and the connecting piece 105c from being flush with or lower than the surface of the base unit chassis 21 so as not to be caught. The front oblique corner portion of the upper surface of the base unit chassis 21 of the clip mounting portion 108 on the side of the sub guide shaft 33 is formed deep so as to secure a sufficient sinking of the contact piece 105d.

The clip 104 and the base unit cover 100 having such a configuration are assembled to the disk drive assembly 20, as shown in FIGS. At this time, one end of the lead wire 107 is soldered to the fixing portion 106d of the second holding portion 106 of the clip 104 in advance.

First, the first holding portion 10 of the clip 104
The opening side of 5 faces the clip mounting portion 108 of the base unit chassis 21, and the clip mounting portion 108 is inserted into the first holding portion 105. As a result, the clip mounting portion 108 is held between the pair of holding pieces 105a and 105b. At the same time, the opening side of the second holding portion 106 faces the motor base plate 36, and the second holding portion 10
6 is inserted into the motor base plate 36. As a result, the motor base plate 36 is held between the pair of holding pieces 106a and 106b.

As a result, other portions of the first holding portion 105 of the clip 104 except for the contact piece 105d are housed in the clip mounting portion 108, and the surfaces of the first holding piece 105a and the connecting piece 105c are Base unit chassis 2
1 is the same as or lower than the surface.
Therefore, since the surfaces of the first holding piece 105a and the connecting piece 105c do not protrude from the clip mounting portion 108, it is possible to prevent the surface of the base unit cover 100 from being uneven. Meanwhile, the clip 104
As shown in FIGS. 17, 20B and 21B, the contact piece 105d protrudes upward from the clip mounting portion.

Next, the base unit cover 100 is put on the upper surface of the disk drive assembly 20. Then, the base unit cover 1 is fixed using a predetermined number of fixing screws 109a.
00 is fastened and fixed to the base unit chassis 21. As a result, as shown in FIGS.
04 and the base unit cover 100 are completed.

At this time, as shown in FIGS. 20A and 21A, the contact piece 10
Since the tip of 5d is pressed by its own spring force, the clip 104 and the base unit cover 100 are conducted, and a current can flow. Similarly, since the motor base plate 36 is held by the second holding portion 106 of the clip 104, the clip 104 and the motor base plate 36 are electrically connected, and a current can flow.

Next, the cover-equipped disk drive assembly 20 to which the base unit cover 100 and the clip 104 are attached is assembled to the base frame 94. The assembling of the disk drive assembly with cover 20 to the base frame 94 is performed by a structure as shown in FIGS.

First, the configuration of the base frame 94 will be described. The base frame 94 is formed of a sheet metal plate having a larger planar shape than the disk drive assembly with cover 20. This base frame 94
Is mostly covered with an insulating sheet member 98. A notch 98a is provided in a part of the sheet member 98, and the ground of the base frame 94 is removed from the notch 98a. Is exposed. A large number of mounting pieces 94a and 94b are provided on the peripheral edge of the base frame 94 for mounting on a camera frame or the like or mounting other components.

The mounting pieces 94a, 94 of the base frame 94
b includes a front mounting piece 94a protruding to the front side and a rear mounting piece 94b protruding to the rear side. A main wiring board 110 is mounted on a part of the back mounting piece 94b. The main wiring board 110 has a control IC, memory (ROM and RAM), resistors, capacitors, Connectors and other electronic components and electrical elements are mounted. Further, support portions 94c are provided at portions exposed by the three notches 98a of the base frame 94 to support the above-described disk drive assembly with cover 20.

The three support pieces 94c are arranged substantially evenly so as to support the disk drive assembly with cover 20 from three directions, and the insulator holders 111 are detachably mounted on the respective support pieces 94c. . An insulator 112 formed of a rubber-like elastic body is attached to each insulator holder 111. In order to elastically support the disk drive assembly with cover 20 using these insulators 112, support arms 113 protruding laterally are provided at three corresponding portions of the base unit chassis 21.

Each support arm 113 is connected to the insulator 1
12 are inserted through through-holes provided so as to penetrate through the center of the twelve. By supporting the three support arms 113 from three sides via the insulator 112, the disk drive assembly with cover 20 is elastically supported by the base frame 94. Further, as shown in FIGS. 22A and 22C, the other end of the lead wire 107 having one end connected to the clip 104 is fastened and fixed to the insulator holder 111 by a fixing screw 114. Thus, the lead wire 107 is connected to the base frame 94 via the fixing screw 114 so that current can flow.

The disk drive assembly 20, the base unit cover 100, and the base frame 94 assembled as described above constitute a disk drive device 17 according to the first embodiment of the present invention. According to the disk drive device 17 having such a configuration, for example, reproduction and / or recording of the optical disk D can be executed as follows.

First, the optical disk D is mounted on the turntable 24. This operation can be performed as follows. For example, a plurality of locations on the outer peripheral edge of the optical disk D are gripped, and the center holes thereof are
4a. Then, the optical disk D is lightly pressed to retreat the three lock claws 24c and pass through the center hole. As a result, chucking is performed by the three lock claws 24c passing through the center hole riding on three locations on the edge of the center hole.

Next, by driving the spindle motor 23, the optical disk D is integrated with the turntable 24.
To rotate. At the same time or subsequently, the feed motor 27 of the head feed mechanism is driven. in this case,
The head feed mechanism is operated to set the optical pickup device 25 to the initial position. That is, the feed motor 27
Is driven to rotate in a direction to bring the slide member 61 closer to the turntable 24. The rotational force of the feed motor 27 is transmitted from the output gear 48 to the feed screw shaft 26 via the drive gear 54, and the feed screw shaft 26 rotates by an angle or rotation number corresponding to the rotation angle or rotation speed of the feed motor 27. Driven.

As a result, the feed nut 67 moves in the axial direction of the feed screw shaft 26 by the rotation of the feed screw shaft 26.
When the slide member 61 approaches a predetermined position on the turntable 24, the position detection piece 69b is detected by the position detection sensor 76. Thus, the operation of the head feed mechanism is stopped, and this stopped position is set as the initial position of the optical pickup device 25. Through this state, the operation of reproducing or recording the information signal is performed.

That is, the slide member 61 is moved from the radial inside to the radial outside of the optical disk D by the operation of the head feed mechanism. At this time, the optical pickup 6
2 is irradiated from the objective lens 70 of the optical head 62a toward the information recording surface of the optical disk D. As a result, at the time of reproduction, an information signal recorded in advance is read out by the laser beam applied to the information recording surface, and a reproduction operation is performed based on the information signal. At the time of recording, an information signal is written by the laser beam applied to the information recording surface, and a recording operation is performed.

In this case, when the spindle motor 23 is driven, a number of fins 42 formed integrally with the turntable 24 fixed to the rotating portion 23b are driven to rotate integrally. The fins 42 are arranged in the air passages 35 formed in the base unit chassis 21, and the rotation of the fins 42 sucks air from one of the air passages 35 and discharges air from the other of the air passages 35.
As a result, an air flow (wind) is generated in the air passage 35, and the air is discharged from the outlet of the air passage 35 and circulated in the base unit chassis 21.

The wind circulating in the base unit chassis 21 is generated by the optical pickup 6 which is a heat source.
2. It is sprayed on the spindle motor 23, the feed motor 27, the printed wiring boards 73a, 73b, and the like. As a result, the wind generated by the rotation of the fins 42 causes the optical pickup 62 and the spindle motor 23, which are heat sources, to generate heat.
And the like are cooled, and these temperature rises can be prevented.
Therefore, it is possible to prevent performance degradation and performance degradation of the device due to heat generation, stabilize the irradiation of laser light, and suppress performance degradation during recording and reproduction.

The disk drive device 17 having such a configuration, operation, and effect can be used by being mounted on an electronic device as shown in FIGS. 35 to 37, for example.
FIG. 35 and FIG. 36 are applied to a digital video disk camera showing a specific example of an electronic apparatus. The digital video disc camera 80 uses a recordable optical disc as an information recording medium, and has a function of a digital still camera and a function of a video tape recorder.

This digital video disc camera 80
Has a configuration as shown in FIG. In FIG. 37, 81 is a focus ring, 82 is a lens cover,
83 is a lens assembly, 84 is a lens barrel cover, 85 is a mounting ring, 86 is a front camera frame, 87 is an electronic view finder, 88 is a finder holder, 89 is a finder ring, 90 is a finder case, 91 is a battery holder, and 92 is a battery holder. Is a battery power supply, 93a to 93c are wiring boards, 94 is a base frame, 95 is a rear camera frame, 96 is a liquid crystal display device, and 97 is a disk mounting lid.

The lens assembly 83 has a lens holder 83a in which a plurality of combined lenses are housed, and a solid-state image pickup device (CCD) 83b disposed on the opposite side of the lens holder 83a from the objective lens. . The objective lens side of the lens assembly 83 is covered with a lens cover 82, and a focus ring 81 is attached to the tip of the objective lens. A lens barrel cover 84 is attached to a lower portion of the lens assembly 83 on the side of the solid-state imaging device 83b. The lens barrel cover 84 is attached to the cylinder 86a of the front camera frame 86 by an attachment ring 85. An electronic viewfinder 87 is provided above the solid-state imaging device 83b.

The electronic view finder 87 is mounted on a finder holder 88, and a finder ring 89 is disposed behind the electronic view finder 87. The upper and lower sides of the electronic viewfinder 87 including the finder ring 89 are covered by an upper cover 89a and a lower cover 89b which are divided into two parts in the vertical direction. The entire viewfinder including the electronic viewfinder 87 is covered with a viewfinder case 90. This prevents extra light from entering the electronic viewfinder 87.

Further, behind the solid-state imaging device 83b, three wiring boards 93a to 93c are arranged so as to overlap in the front-back direction. Front two wiring boards 93a, 93
Reference numeral b denotes a circuit provided with a camera electronic circuit, and one rear wiring board 93c includes a drive electronic circuit. Thereafter, the disk drive device 17 is mounted on the base frame 94 behind the wiring board 93c.

As shown in FIG. 36, a power switch 98a and a shutter button 98b are provided above the grip 86b. A switch cover 98c to which a focus switch or the like is attached is attached to a side surface of the cylindrical portion 86a opposite to the grip portion 86b. A large opening 95a is provided on the rear surface of the rear camera frame 95, and a surface of the disk drive device 20 on the turntable 24 side is largely exposed from the opening 95a. The opening 95a can be opened and closed by a disc mounting lid 97 connected to the rear camera frame 95 by a hinge. The disc mounting lid 97 is provided with a display window 97a, and a liquid crystal display 96 is mounted on the display window 97a. This disk mounting lid 9
7 can be locked and unlocked by an open / close switch 95b provided on the side surface of the rear camera frame 95.

A battery holder 91 is housed inside the grip 86b of the camera body. A battery cover is detachably attached to the front of the battery holder 91, and a battery power supply 92 is detachably attached to the battery holder 91. A terminal holder 91 a is detachably attached to the battery holder 91, and a battery power supply 92 is attached to and detached from the battery holder 91 via attachment and detachment of the terminal holder 91 a.

The digital video disk camera 80 having such a configuration can be used, for example, as follows. In this case, the operation of mounting / removing the optical disk, which is the information recording medium, is performed by opening the disk mounting cover 97 as necessary and performing a manual operation. That is, the disc mounting cover 97 is opened to open the opening 95a of the rear camera frame 95, and the optical disc is mounted on the turntable 24 of the disc drive device 17 exposed thereby, or the optical disc previously mounted is removed. .

After the optical disk is mounted on the disk drive device 17, the user can take a picture by closing the disc mounting cover 97, and can record video information and audio information by this photography. That is, by turning on the power switch 98a and then pressing the shutter button 98b, a continuous image can be transferred in the same manner as a general video camera, or a single image can be shot in the same manner as an ordinary camera, depending on the shooting mode. It can be performed.

According to the disk drive device 17,
The entire upper surface of the disk drive assembly 20 is covered by the base unit cover 100, and the base unit cover 100 is electrically connected to the base frame 94 via the clip 104 and the lead wire 107. Electricity can flow from 100 to the base frame 94.
Assuming that static electricity acts on the disk drive device 17, the static electricity is applied to the disk drive assembly 20.
Act on the base unit cover 100 before reaching.

However, since the base unit cover 100 is connected to the base frame 94 via the clip 104 and the lead wire 107, static electricity applied to the base unit cover 100 does not fly to the disk drive assembly 20 therefrom. , The clip 104 and the lead wire 107 to the base frame 94. Therefore, it is possible to prevent static electricity from flying to the disk drive assembly 20, particularly to the optical pickup device 25. Therefore, electronic components and electric elements such as a laser diode and a laser driver IC attached to the disk drive assembly 20 can be prevented. Electrostatic damage due to the influence of static electricity can be prevented.

Further, the motor base plate 36 is
4 and the lead frame 107 are connected to the base frame 94. Therefore, static electricity is generated by the spindle motor 2
In the case of flying to 3, the static electricity flows from the motor base plate 36 to the base frame 94 via the clip 104 and the lead wire 107. Therefore, the spindle motor 23
Hall elements and other electronic components used in the control of
The electric element can be prevented from being affected by static electricity, and the occurrence of electrostatic breakdown due to the static electricity can be prevented.

FIGS. 23 to 28 show a second embodiment of the base unit cover according to the present invention. The base unit cover 120 according to the second embodiment is configured such that the base unit cover 120 alone can be electrically connected to the base frame 94 without using the clip 104 and the lead wire 107 described above. This second
In the embodiment, since there is no change in the disk drive assembly 20 and the base frame 94, the same portions are denoted by the same reference numerals and description thereof will be omitted.

As shown in FIGS. 23A, 23B and 23C, the base unit cover 120 is attached to the disk drive assembly 20.
An upper surface portion 120a capable of covering the upper surface of the upper surface portion, and a side surface portion 120 covering the outer peripheral edge of the upper surface portion 120a over substantially the entire circumference.
b, and a first grounding piece 121 and a second grounding piece 122 showing a second embodiment of the grounding means. The upper surface portion 120 a has a shape corresponding to the upper surface shape of the disk drive assembly 20, is provided with a circular through-hole 123 at a position corresponding to the turntable 24, and corresponds to the objective lens 70 of the optical pickup 62. A long slot 124 having a predetermined width is provided at a position where the hole extends.

[0107] Through-hole 12 of base unit cover 120
3 is formed slightly larger than the diameter of the turntable 24, and the mounting portion 24b of the turntable 24 is penetrated during assembly. Also, the base unit cover 12
The zero through-hole 124 is formed to be slightly wider than the width of the objective lens 70 of the optical head 62a, and extends so as to overlap the movement locus of the objective lens 70. Further, a plurality of (three in this embodiment) through holes 125 are provided in the upper surface portion 120a for fixing the base unit cover 120 to the base unit chassis 21. A counterbore 125 a for accommodating the head of the fixing screw is provided at the peripheral edge of each insertion hole 125.

Side portion 12 of base unit cover 120
The first grounding piece 121 is formed integrally with Ob. The first ground piece 121 has a leg portion 121a protruding on the opposite side to the upper surface portion 120a, and an elastic portion 121b connected to the tip of the leg portion 121a. The plane of the leg part 121a is set in a direction orthogonal to the plane of the upper surface part 120a, and the elastic part 121b is provided by expanding the plane in a direction crossing the plane. In other words, the elastic portion 121b bends a portion continuous with the leg portion 121a at 90 ° to develop in parallel with the upper surface portion 120a, and also bends at an appropriate angle of 90 ° or less near the continuous portion to incline the distal end side. The elasticity is given by doing. The distal end of the elastic portion 121b is pressed against the upper surface of the base frame 94.

Further, the second of the base unit cover 120
The ground piece 122 is provided inside the portion 120c where the continuity of the side surface portion 120b is interrupted. The second ground piece 122 is formed by the elastic portion 121 of the first ground piece 121.
It has the same configuration as b, and is formed by making a U-shaped cut in a part of the upper surface 120a.
Then, elasticity is imparted by bending the portion continuous with the upper surface portion 120a to an appropriate angle of 90 ° or less and inclining the distal end side. The tip of the second ground piece 122 is pressed against the upper surface of the motor base plate 36.

The base unit cover 120 is also used for the same purpose as the base unit cover 100 described above, and covers the upper surface of the disk drive assembly 20 to prevent dust and dirt from adhering. It has a role of protecting electronic components and electric elements mounted on a printed wiring board and the like from static electricity. Therefore, as the material of the base unit cover 120, various conductive materials such as stainless steel and steel steel, which are similarly made of an electric conductor having excellent conductivity, can be used.

The base unit cover 120 is attached to the disk drive assembly 20 as follows.
That is, the base unit cover 120 is put on the disk drive assembly 20, and the base unit cover 120 is fastened and fixed to the base unit chassis 21 by using a predetermined number of fixing screws 109a. As a result, FIGS.
As shown in FIG. 7, assembly of the base unit cover 120 to the disk drive assembly 20 is completed.

At this time, as shown in FIG. 25, the elastic portion 1 of the first grounding piece 121 of the base unit cover 120 is used.
The tip of 21b is pressed against the upper surface of the base frame 94 by its own spring force. Therefore, the base unit cover 120 and the base frame 94 are directly connected to each other via the first grounding piece 121, so that a current can flow. Also, as shown in FIGS. 25 and 27,
The tip of the second ground piece 122 is pressed against the upper surface of the motor base plate 36 by its own spring force. Therefore, the motor base plate 36 is
And the base frame 94 are directly conducted, and a current can be passed.

The cover-equipped disk drive assembly 20 with the base unit cover 120 mounted as described above is assembled on the base frame 94. This base frame 9
The assembling of the disk drive assembly with cover 20 with respect to the fourth embodiment is similar to that of the first embodiment described above. As a result, a disk drive device 18 as shown in FIGS. 28A, 28B and 28C is obtained. With the disk drive device 18 having such a configuration, effects similar to those of the first embodiment can be obtained.

FIGS. 29 to 34 show a third embodiment of the base unit cover according to the present invention. The base unit cover 130 shown in the third embodiment is configured so that it can be electrically connected to the base frame 94 by using a coil spring. In the third embodiment, since there is no change in the disk drive assembly 20 and the base frame 94, the same portions are denoted by the same reference numerals and description thereof will be omitted.

As shown in FIGS. 29A, 29B and 29C, the base unit cover 130 is attached to the disk drive assembly 20.
Upper surface portion 130a that can cover the upper surface of the upper surface portion, and side surface portion 130 that covers the outer peripheral edge of the upper surface portion 130a over substantially the entire circumference.
b, a first ground piece 131 and a second ground piece 132
And a coil spring 133 that constitutes a grounding means by combining with the first and second grounding pieces 131 and 132.

Upper surface 13 of base unit cover 130
0a has a shape corresponding to the shape of the upper surface of the disk drive assembly 20, a circular through hole 134 is provided at a position corresponding to the turntable 24, and a position corresponding to the objective lens 70 of the optical pickup 62. Is provided with a through-hole 135 having a predetermined width. These through-holes 134 and through-holes 135 are formed by the above-described through-holes 10.
1 and the through-hole 102, etc., and extend in the same direction. And, on the upper surface portion 130a,
Similarly, an insertion hole 136 and a counterbore 136a are provided.

Side portion 13 of base unit cover 130
The first ground piece 131 is provided integrally with Ob. The first ground piece 131 protrudes on the opposite side to the upper surface portion 130a, and a spring receiving portion 131a is formed by bending the tip of the first ground piece 131 into a crank shape. Also, the second grounding piece 13 of the base unit cover 130
2 is a portion 130c where the continuity of the side portion 130b is interrupted
It is provided inside. This second ground piece 132
Has the same configuration as the first grounding piece 131,
A spring receiving portion 132a is formed by bending a tip portion protruding in a direction opposite to the upper surface portion 130a into a crank shape.

One end of the coil spring 133 is supported by the spring receiving portions 131a and 132a. The coil spring 133 is used to electrically connect the base unit cover 130 to the base frame 94 or the motor base plate 36. Therefore, the material of the coil spring 133 is the base unit cover 13
As in the case of 0 or the like, use is made of a metal such as stainless steel or steel made of an electric conductor and other materials having excellent conductivity.
The base unit cover 130 is also used for the same purpose as the above-described base unit covers 100 and 120. Therefore, the base unit cover 130 is made of a metal such as stainless steel or steel, which is also made of an electric conductor having excellent conductivity. Various materials having the above conductivity can be used.

This base unit cover 130 can be attached to the disk drive assembly 20 as follows. That is, the base unit cover 130 is put on the disk drive assembly 20 and the base unit cover 130 is fastened and fixed to the base unit chassis 21 by using a predetermined number of fixing screws 109a. At this time, one end of the first coil spring 133 is seated on the spring receiving portion 131a of the first grounding piece 131, and the other end is seated on the base frame 94. Further, one end of the second coil spring 133 is seated on the spring receiving portion 132 a of the second grounding piece 132, and the other end is seated on the motor base plate 36. As a result, as shown in FIGS. 30 to 33, the base unit cover 130 for the disk drive assembly 20 is formed.
Is completed.

At this time, as shown in FIG. 31, one end of the coil spring 133 is electrically connected to the first grounding piece 131, and the other end of the coil spring 133 is connected to the base frame 9.
4 is electrically connected. Therefore, the first ground piece 1
The base unit cover 130 and the base frame 94 are electrically connected via the coil spring 31 and the coil spring 133, so that a current can flow. As shown in FIGS. 31 and 33, a coil spring 133 is
Is electrically connected, and the other end of the coil spring 133 is electrically connected to the motor base plate 36. Therefore, the motor base plate 36 and the base frame 94 are electrically connected via the second grounding piece 132 and the coil spring 133, and a current can flow.

The cover-equipped disk drive assembly 20 with the base unit cover 130 mounted as described above is assembled on the base frame 94. This base frame 9
The assembling of the disk drive assembly with cover 20 with respect to the fourth embodiment is similar to that of the first and second embodiments described above.
As a result, the disk drive device 19 as shown in FIGS. 34A, 34B and 34C is obtained. With the disk drive device 19 having such a configuration, effects similar to those of the first embodiment described above can be obtained.

In the above embodiment, an example in which the disk drive devices 17 to 19 are applied to the digital video disk camera 80 has been described. However, the present invention can be applied to the following electronic devices. For example, CD player, D
The present invention can be applied to a VD player, a CD-ROM drive, a DVD drive, a CD-R drive, a CD-RW drive, and various other disk drives. In other words, the present invention can be applied not only to a disk recording / reproducing apparatus for both recording and reproduction but also to a disk recording apparatus or a disk reproducing apparatus capable of performing only one of recording and reproduction.

Further, in the above embodiment, an example in which an optical disk is used as an information recording medium has been described. However, the present invention is applied to a magnetic disk such as a magneto-optical disk, a floppy (registered trademark) disk, and various other disk-shaped recording media. Of course, you can do that. At this time, it goes without saying that a magneto-optical pickup device, a magnetic pickup device and the like are similarly applied to the pickup device according to the type of the disk-shaped recording medium. Thus, the present invention can be variously modified without departing from the spirit thereof.

[0124]

As described above, according to the disk drive of the present invention, the base unit chassis, the pickup device, the base frame, the base unit cover and the grounding means are provided, and the base unit cover and the grounding means are connected via the grounding means. Since the base unit is electrically connected to the base frame, static electricity can be prevented from being charged to the base unit chassis supporting the pickup device and the spindle motor of the disk rotating mechanism. Can be prevented from flying to a pickup device, a spindle motor, or the like.

Therefore, durability against static electricity is weak,
When excessive static electricity is applied, devices such as Hall elements and laser diodes that cause electrostatic breakdown due to the static electricity can be protected from static electricity, and these devices can be prevented from being damaged by static electricity. The effect can be obtained. Further, since most of the base unit assembly is covered with the conductive base unit cover, it is possible to obtain an effect that radiation noise emitted from the laser driver IC of the pickup device can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a disk drive assembly according to a disk drive device of the present invention.

FIG. 2 is a plan view of the disk drive assembly shown in FIG.

FIG. 3 is a front view of the disk drive assembly shown in FIG. 1;

FIG. 4 is a bottom view of the disk drive assembly shown in FIG. 1;

FIG. 5 is an explanatory view showing, on an enlarged scale, a main part of the disk drive assembly shown in FIG. 4 from which a base unit sub-chassis is removed;

FIG. 6 is an explanatory view of the disk drive assembly shown in FIG. 4 with a motor base plate removed from the bottom view.

FIG. 7 is a rear view showing a cross section of a main part of the disk drive assembly shown in FIG. 1;

FIG. 8 is a sectional view taken along line WW of the disk drive assembly shown in FIG. 2;

FIG. 9 is a sectional view taken along line XX of the disk drive assembly shown in FIG. 2;

FIG. 10 is a left side view of the disk drive assembly shown in FIG. 1;

FIG. 11 is a sectional view of the disk drive assembly shown in FIG.
It is a line sectional view.

FIG. 12 is a ZZ of the disk drive assembly shown in FIG. 2;
It is a line sectional view.

FIG. 13 is a plan view of the disk drive assembly shown in FIG. 2 with a base unit chassis removed.

FIG. 14 is a front view showing the spindle motor and the optical pickup device of FIG.

15 shows a first embodiment of a base unit cover according to the disk drive of the present invention, wherein FIG. 15A is a plan view and FIG. 15B is a front view.

16A and 16B show a clip according to the disk drive device of the present invention. FIG. A is a perspective view seen from the front side, FIG. 16B is a perspective view seen from the back side, FIG. FIG. D is a left side view, and FIG. E is a bottom view.

17 is a plan view showing a state where the base unit cover of FIG. 15 is attached to the disk drive assembly of FIG. 1;

18 is a front view showing a state where the base unit cover of FIG. 15 is attached to the disk drive assembly of FIG. 1;

FIG. 19 is a bottom view showing a state where the base unit cover of FIG. 15 is attached to the disk drive assembly of FIG. 1;

20 shows the disk drive assembly of FIG. 1 and the base unit cover of FIG. 15, wherein FIG. 20A is a rear view showing a part of the assembled state, and FIG. It is a rear view.

21 shows the disk drive assembly of FIG. 1 and the base unit cover of FIG. 15, wherein FIG. 21A is a left side view in an assembled state, and FIG. 21B is a left side view in a separated state.

FIG. 22 shows a state where the disk drive assembly with cover of FIG. 17 is attached to a base frame;
Is a plan view, FIG. B is a front view, and FIG. C is a left side view.

23 shows a second embodiment of the base unit cover according to the disk drive of the present invention, wherein FIG. 23A is a plan view, FIG. 23B is a front view, and FIG. 23C is a left side view.

24 is a plan view showing a state where the base unit cover of FIG. 23 is attached to the disk drive assembly of FIG. 1;

25 is a left side view showing a state where the base unit cover of FIG. 23 is attached to the disk drive assembly of FIG. 1;

26 is a bottom view showing a state where the base unit cover of FIG. 23 is attached to the disk drive assembly of FIG. 1;

27 is a partially sectional rear view showing the disk drive assembly of FIG. 1 and the base unit cover of FIG. 23;

28 shows a state where the disk drive assembly with cover of FIG. 24 is attached to a base frame, and FIG.
Is a plan view, FIG. B is a front view, and FIG. C is a left side view.

29 shows a third embodiment of the base unit cover according to the disk drive of the present invention, wherein FIG. 29A is a plan view, FIG. 29B is a front view, and FIG. 29C is a left side view.

30 is a plan view showing a state where the base unit cover of FIG. 29 is attached to the disk drive assembly of FIG. 1;

FIG. 31 is a left side view showing a state where the base unit cover of FIG. 29 is attached to the disk drive assembly of FIG. 1;

FIG. 32 is a bottom view showing a state where the base unit cover of FIG. 29 is attached to the disk drive assembly of FIG. 1;

33 is a partially sectional rear view showing the disk drive assembly of FIG. 1 and the base unit cover of FIG. 29;

FIG. 34 shows a state in which the disk drive assembly with cover of FIG. 30 is attached to a base frame, and FIG.
Is a plan view, FIG. B is a front view, and FIG. C is a left side view.

FIG. 35 is a side view showing an embodiment of a digital video disk camera using the disk drive device of the present invention.

FIG. 36 is a plan view showing an embodiment of a digital video disk camera using the disk drive device of the present invention.

FIG. 37 is an exploded perspective view showing an embodiment of a digital video disk camera using the disk drive device of the present invention.

FIG. 38 is a perspective view showing a conventional disk drive device.

[Explanation of symbols]

17, 18, 19 disk drive device, 20 disk drive assembly, 21 base unit chassis, 22 base unit sub-chassis, 23 spindle motor, 24 turntable, 25 optical pickup device (pickup device), 26 feed screw shaft, 27 feed Motor, 28 openings, 32
Motor housing, 33 sub guide shaft, 36 motor base plate, 48 output gear, 54 drive gear, 6
0 guide shaft, 61 slide member, 62 optical pickup, 67 feed nut, 80 digital video disc camera, 94 base frame, 10
0, 120, 130 Base unit cover, 104
Clip, 105, 106 holding portion, 107 lead wire, 108 clip mounting portion, 121, 122,
131, 132 Ground strip, 133 Coil spring,
D Optical disk (disk-shaped recording medium)

Claims (8)

[Claims] 1. A base unit chassis to which a disk rotating mechanism for detachably mounting and rotating and driving a disk-shaped recording medium is mounted, and movably supported by the base unit chassis and mounted to the disk rotating mechanism. Recording and / or recording of an information signal on the disk-shaped recording medium which is rotationally driven.
Or a pickup device for performing reproduction, a base frame made of an electric conductor supporting the base unit chassis, and an electric conductor covering the base unit chassis and preventing the base unit chassis from being charged with static electricity. A disk drive device comprising: a base unit cover; and a grounding unit that connects the base unit cover and the base frame to flow static electricity charged on the base unit cover to the base frame. 2. The grounding means comprises an electric conductor having a first holding portion for holding a peripheral portion of the base unit chassis and a connection piece pressed against one of the base unit cover and the base frame. And the clip
A lead wire having one end connected to the clip and the other end connected to the other of the base unit cover and the base frame; and connecting the base unit cover and the base frame via the clip and the lead wire. 2. The disk drive according to claim 1, wherein the disk drive is turned on. 3. The clip is provided with a second holding portion for holding the disk rotation mechanism and holding a motor base plate made of an electric conductor attached to the base unit chassis. 3. The disk drive device according to claim 2, wherein the motor base plate and the base frame are electrically connected via a portion. 4. The base unit chassis is provided with a clip recess at a portion of the base unit chassis to which the clip is attached, for storing the clip and preventing its surface from protruding from the surface of the base unit chassis. 3. The disk drive device according to claim 2, wherein: 5. The grounding means comprises a first grounding piece provided on the base unit cover and having a front end portion pressed against the base frame, wherein the base unit cover and the base unit cover are connected via the first grounding piece. 2. The disk drive device according to claim 1, wherein conduction is provided between the base frames. 6. The grounding means includes a second grounding piece provided on the base unit cover and having a distal end pressed against the motor base plate, and the motor base is provided via the second grounding piece. 6. The disk drive device according to claim 5, wherein electrical conduction is provided between the plate and the base unit cover. 7. The grounding means includes a first leg piece provided on the base unit cover and protruding toward the base frame, and is hung between the first leg piece and the base frame. 2. The disc according to claim 1, wherein the disc is made up of a first elastic body to be passed, and the base unit cover and the base frame are electrically connected via the first leg piece and the first elastic body. Drive device. 8. The grounding means is provided on the base unit cover and protrudes toward the motor base plate, between the second leg and the motor base plate. And a second elastic body that is bridged between the motor base plate and the base unit cover via the second leg piece and the second elastic body. 8. The disk drive device according to 7.