JP2002025243A - Disk drive assembly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spindle motor with a propeller or fins coaxially with its revolving shaft, to generate wind by the rotation of the spindle motor and to act this wind on heating elements, such as a pickup device, a motor, electric circuits or the like, such that these heating elements can be cooled. SOLUTION: This disk drive assembly has a turntable 424 which is attachably and detachably mounted with an optical disk 41 and the spindle motor 23 which has the revolving shaft 23c mounted with this turntable 24. The revolving shaft 23c of the spindle motor 23 is provided thereon with the fins 42 or propeller 43 rotated integrally with the revolving shaft 23c.

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. 21 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 having such a configuration, devices and components, such as the optical pickup device 5 and the feed motor 7, which generate heat and emit heat when driven, etc. On the other hand, there is no device or mechanism for forcibly cooling these devices, components, and the like. Therefore, there has been a problem that the temperature inside the device rises and adversely affects heat generation.

That is, the optical pickup device 5 performs writing and reading of an information signal by irradiating a laser beam onto the information recording surface of an optical disk, and consumes a large amount of power during recording and reproduction. It becomes a heating element and emits a lot of heat. The feed screw shaft 6 is driven to rotate by a feed motor 7 which is an electric motor.
Similarly, because of high power consumption, it becomes a heating element and emits much heat. As the time elapses, the temperature inside the disk drive device 1 rises, deteriorating the characteristics of the pickup.

For example, when the optical pickup device 5 emits a laser beam having a weak temperature characteristic, its performance is remarkably reduced due to the temperature rise, and the irradiation intensity of the laser beam is reduced, and the optical axis is changed. Causes malfunction. As a result, the recording and reproducing performance of the information signal is remarkably deteriorated, making it impossible to use it at a high temperature. In particular, there is a problem that it is difficult to use a high-density disc which requires a high accuracy of laser beam irradiation. .

The present invention has been made in view of such a conventional problem. A propeller or a fin is provided coaxially with a rotation axis of a spindle motor, and wind is generated by the rotation of the spindle motor. An object of the present invention is to solve the conventional problems by acting on heating elements such as a pickup device, a motor, and an electric circuit to cool the heating elements.

[0010]

Means for Solving the Problems In order to solve the above-mentioned problems and the like and to achieve the above-mentioned object, the present invention relates to claim 1 of the present application.
The disk drive device according to claim 1, wherein the disk drive device comprises: a turntable on which a disk-shaped recording medium is detachably mounted; and a spindle motor having a rotary shaft to which the turntable is mounted. It is characterized in that a propeller or a fin that is rotated integrally with the rotating shaft is provided on the upper part.

[0011] The disk drive device according to claim 2 of the present application is characterized in that the propeller or the fin is provided so as to extend radially outward with respect to the center of rotation of the rotating shaft.

[0012] The disk drive device according to claim 3 of the present application is characterized in that the propeller or the fin is provided so as to extend radially outward from a position offset from the rotation center of the rotation shaft.

[0013] The disk drive device according to claim 4 of the present application is characterized in that the propeller or the fin is integrally provided on the lower surface of the turntable.

According to a fifth aspect of the present invention, there is provided a disk drive device including a base unit chassis for supporting a spindle motor, the base unit chassis surrounding a propeller or a fin and being rotated by rotation of the propeller or the fin. It is characterized in that an air passage is provided for guiding the generated wind to the heating element.

According to a sixth aspect of the present invention, in the disk drive device, the air passage has an outer peripheral wall which covers the outer peripheral surface of the propeller or the fin over substantially half a circumference, and is connected to both sides of the outer peripheral wall to collect wind. And a wind passage wall leading to the heating element.

With the above configuration, in the disk drive device according to the first aspect of the present invention, since the propeller or the fin is provided on the rotation shaft of the spindle motor,
The drive of the spindle motor causes the propellers or fins to rotate integrally, generating wind. By blowing the wind onto the heating element, heat is removed from the heating element to cool it, thereby preventing a rise in the temperature of the heating element and preventing deterioration of the characteristics of the heating element due to the temperature rise.

In the disk drive device according to the second aspect of the present invention, the propellers or the fins extend radially outward around the center of rotation of the rotating shaft, thereby efficiently generating wind while having a simple structure. Thus, the heating element can be cooled.

In the disk drive device according to the third aspect of the present invention, the propeller or the fin extends radially outward from a position deviated from the rotation center of the rotation shaft, so that a strong wind can be efficiently generated with a simple structure. By generating the heat well, the heating element can be cooled.

In the disk drive according to the fourth aspect of the present invention, by providing a propeller or a fin integrally with the turntable, the number of parts can be reduced and the number of assembling steps can be reduced to improve productivity. .

In the disk drive device according to the fifth aspect of the present invention, by providing an air passage in the base unit chassis on which the spindle motor is supported, the wind generated by the rotation of the propeller or the fin is transmitted to the heating element through the air passage. The air can be guided and the wind blown to the heat generating element to efficiently cool the heat generating element.

In the disk drive device according to the sixth aspect of the present invention, the wind passage is formed by the outer peripheral wall and the wind passage wall, so that the wind generated by the rotation of the propeller or the fin is collected in the wind passage and the heating element is formed. The heat can be efficiently cooled by blowing the wind to the heating element efficiently.

[0022]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 20 show an embodiment of the disk drive device of the present invention. 1 is a perspective view of one embodiment of a disk drive device as viewed from the top, FIG. 2 is a plan view of the same, FIG. 3 is a front view, FIG. 4 is a bottom view, and FIG. FIG. 6 is an enlarged explanatory view showing a main part from which the parts have been removed, and FIG.
7 is a rear view showing a cross section of a main part of the motor base plate, FIG. 8 is a cross-sectional view taken along line WW of FIG. 2, and FIG. 9 is a cross-sectional view taken along line XX of FIG. 10 is a left side view, FIG.
2 is a sectional view taken along the line YY of FIG. 2, FIG. 12 is a sectional view taken along the line ZZ of FIG. 2, FIG. 13 is a plan view of the base unit chassis removed from FIG. 2, and FIG. FIG. 15 is a front view showing the apparatus, and FIG. 15 is a plan view showing another embodiment such as fins.

FIG. 16 is a side view of a digital video disk camera using the disk drive apparatus of the present invention, FIG. 17 is a plan view thereof, FIG. 18 is an exploded perspective view thereof, and FIG. 19 is a disk drive shown in FIG. FIG. 20 is a plan view in which the device is mounted on a base frame, and FIG.

In a disk drive device 20 shown as a first embodiment of the present invention, a music signal such as audio information, a video signal such as video information, and an information signal such as a music signal are recorded in advance as a disk-shaped recording medium. Use of a read-only optical disk or a recordable optical disk 41 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) Can be. 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. It goes without saying that a magneto-optical disk or other storage medium in which information is written or read by using an optical head and a magnetic head on the magnetic thin film layer can be applied.

This disk drive device 20 is shown in FIGS.
As shown in FIG. 4, the system includes a base unit chassis 21, a base unit sub-chassis 22, 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 substantially at the center 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 storage portion 32 in which the feed motor 27 is stored. And a sub-guide shaft 33 on the back 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.
The air passage 3 guides the wind generated by inhaling and discharging air based on the rotation of fins and the like, which will be described later, and blows the air to the optical pickup device 25 and the like, which are heating elements.
5 are formed.

As shown in FIG. 6, the inner wall 31 has three supporting projections 37a, 37b and 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 arranged 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. 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 38a.
First and second positioning holes into which b is fitted are provided. Then, the second and third support projections 37b, 37c
Are provided with insertion holes through which the screw portions of the adjustment screws 40a and 40b are inserted.

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 disk 41, a mounting portion 24b continuous with the lower end of the fitting portion 24a, and on which the optical disk 41 is mounted. The optical disc 41 has a plurality of lock claws 24c for locking the center hole of the optical disc 41 placed on the placing portion 24b to prevent the optical disc 41 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 41, 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 project outward by an appropriate amount from the outer peripheral surface of the fitting portion 24a so as to be able to lock the peripheral edge of the center hole of the optical disk 41. The optical disk 41 is chucked by the claws 24c. On the other hand, three lock claws 24
By pushing c into the fitting portion 24a against the urging force of the elastic body, chucking of the optical disk 41 by the lock claw 24c can be released.

In order to facilitate the operation of chucking and releasing the optical disk 41, each lock claw 24
On the upper surface and the lower surface of the distal end portion c, an inclined portion having an appropriate size is provided. According to the turntable 24, the optical disk 41 is chucked by the action of the three lock claws 24c, and is integrally rotated in this state. On the other hand, for example, the optical disk 41 is tilted obliquely, and the locking claw 24 is retracted with the force to escape from the center hole, whereby the chucking state is released and the optical disk 41 can be easily removed. .

The mounting portion 24b of the turntable 24 is provided with a disk support surface 24d made of a rubber-like elastic material or plastic having a high 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 41 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 rotating and driving the turntable 24 having the fins 42 is connected to a flexible wiring 45 mounted on a motor base plate 36. A part of the flexible wiring 45 is led out from the side and connected to a power supply circuit (not shown).

Note that, instead of the above-described fin 42, FIG.
A fin 42a having a shape as shown in FIG. A, a propeller 43 having a shape as shown in FIG. The fin 42 a shown in FIG. 15A is attached to the outer peripheral surface of the cylindrical body 44 at an angle. Each of the fins 42a is a plate-like member like the fins 42, but its plane direction does not intersect at the center of the cylindrical body 44, and the oblique radiation direction from a position deviated from the rotation center. Has been extended.

In the propeller 43 shown in FIG. 15B, each blade 43 a has a blade shape like a blade of a fan, and a plurality of such blades are attached to the outer peripheral surface of the cylindrical body 44. Each blade 43a of this propeller 43
Are mounted in a state where the plane direction is expanded in the circumferential direction of the cylindrical body 44, and if necessary, each blade 43a
Can have a twist. Further, the shapes of the fins and the propellers are not limited to these embodiments.

[0041] 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 vertical partition walls 47 and the feed into the space of a square surrounded by the motor 2
7 is fitted.

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 the two surface width portion sandwich is press-fitted between the outer portion 21b ₁ and the transverse partition walls 46, the feed motor 27 is attached is inserted into the space part of the base unit chassis 21. The rotation shaft 27b of the feed motor 27 protrudes from one axial end of the motor main body 27a, and penetrates a notch 47a provided in the vertical partition wall 47. An output gear 48 and a rotating plate 51 are provided on the protruding portion of the rotating shaft 27b.
And these are integrally driven to rotate by the rotation shaft 27b.

The rotary plate 51 is provided with a number of radially extending slits at equal angular intervals in the circumferential direction. The rotation speed detector 50 is formed by the rotation plate 51 and the detection sensor 52.
Is configured. 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 detection sensor 52 is provided on the inner surface of the side wall portion 21d.
Is provided with a mounting projection 53 for mounting. A fitting hole into which the mounting protrusion 53 is fitted is provided in the detection sensor 52, and the detection sensor 52 is fixed by press-fitting the fitting hole into the mounting protrusion 53.

The detection sensor 52 has a slit-like 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 provided so as to 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.

A drive gear 54 meshes with an output gear 48 fixed to the rotating 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 U-shaped bearing section 55a provided in the lateral surface portions 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 bearing portion 55b provided on a side wall portion 21d of the base unit chassis 21.
The shaft portions 26b and 26 are attached to these bearing portions 55a and 55b.
By engaging c, 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. opening window 56a is provided to expose a part of the driving gear 54.

The screw portion 26a of the feed screw shaft 26 has
Triangular teeth having a triangular cross section are provided so as to be spirally continuous in the axial direction. A guide shaft 60 is arranged inside the feed screw shaft 26 so that the axis is parallel. Both ends of the guide shaft 60 are connected to the side of the inner surface 21 b ₂ of the base unit chassis 21 and the vertical partition wall 4.
7 are supported by being engaged with bearing portions 57a and 57b provided in the first and second bearings. Each of the bearing portions 57a and 57b is formed of a concave portion cut out in a U-shape, is provided so as to face each other, and 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 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 formed of a round bar-shaped member integrally formed with the back wall 21c, and is connected to the back wall 21c by a connecting portion 33a extending laterally. This sub-guide shaft 3
3 is provided so as to be parallel to the guide shaft 60,
The length is set to be substantially the same as the length of the screw portion 26a of the feed screw shaft 26. The sub-guide shaft 33 and the guide shaft 60 allow the optical pickup device 25 to approach and separate 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. Slide member 6
Reference numeral 1 denotes a size capable of straddling between the guide shaft 60 and the sub guide shaft 33, and is formed in a block shape to increase rigidity. A pair of bearings 61a, 61a in the left-right direction is provided on one side of the slide member 61, and each bearing 61a has 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 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 nut part 68 is a screw part 26a.
Has two engaging teeth 68a sandwiching a part of the thread from both sides. The two engagement teeth 68a are formed to be inclined at a predetermined angle corresponding to the leads of the screw portion 26a.

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 provided on the left and right bearings 61 of the slide member 61.
The lower surface between a and 61a is screwed by a fixing screw 58a. An elastic piece 69a protrudes outside the fixed portion of the support 69, and a position detection piece 69b protrudes inside the fixed portion. As shown in FIGS. 5, 8, and 14,
The elastic piece 69a is bent upward in the middle part,
It extends laterally on the tip side from the bent portion,
A nut 68 is fixed to the tip. Further, the position detecting piece 69b is bent upward in the middle part,
From the bent portion, the distal end side extends in the lateral direction similarly to the elastic piece 69a, and the distal end portion is
It protrudes to the three sides to form 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 inclined at a predetermined angle in accordance with the lead of the feed screw shaft 26. Such two engagement teeth 68a, 6
8a is pressed against the screw portion 26a from the inside by the spring force of the elastic piece 69a, and the feed screw shaft 26
It is assembled to overlap with.

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 FIGS. 8 and 9,
The guide shaft 60 and the feed screw shaft 26 are respectively held down by the base unit sub-chassis 22, and are prevented from falling off from the bearings 57a, 57b and 55a, 55b.

The base unit sub-chassis 22 is shown in FIG.
9 to 12, a lower surface portion 22a that covers the motor housing portion 32, a front wall portion 22b that is continuous on the front side of the lower surface portion 22a, and a side wall portion 22c that is also continuous on the side surface side. And a pressing portion 22 d for pressing the fixed portion of the motor base plate 36. And 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. To do. Further, the base unit sub-chassis 22 is provided with an opening window 56b for avoiding interference with the drive gear 54.

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 has an optical head 6 having a two-axis actuator for making the objective lens 70 face the information recording surface of the optical disk.
2a and an optical control unit 62b having a semiconductor laser, a photoelectric conversion element, and the like for recording and reproducing information signals via the optical head 62a. As shown in FIGS. 12 and 13, most of the optical head 62 a is covered with 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 a printed wiring board 73 mounted on the upper surface of the slide member 61. Then, the flexible wiring 75 is connected to the connecting tool 74 mounted on the printed wiring board 73,
The other end of the flexible wiring 75 is connected to a power supply.

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) and other engineering plastics are preferred, but aluminum alloys and other metals can also be applied. Further, as the material of the slide member 61, for example, an aluminum alloy or other metal is preferable, and as the material of the guide shaft 60, the leaf spring 65, and the support 69, for example, stainless steel or another metal is preferable. Also, engineering plastics can be applied.

The disk drive device 20 having the above-described configuration can be easily assembled, for example, as follows. The assembly work of the disk drive device 20 is performed with the base unit chassis 21 turned upside down. In this case, the spindle motor 23, the feed motor 27, and the optical pickup device 25 are pre-assembled in a predetermined manner. That is, the spindle motor 23 is mounted on the motor base plate 36, and the turntable 24 is mounted on the rotating part 23b. An output gear 48 and a rotating plate 51 are attached to the rotating shaft 27b of the feed motor 27. The slide member 61 has the optical pickup 62 mounted thereon, and the feed nut 67 and the leaf spring 65 are also mounted.

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. Next, the detection sensor 52 connected to the feed motor 27 by the flexible wiring 75a is attached to a predetermined position in the motor housing 32. That is, the mounting projection 53 provided on the inner surface of the side wall portion 21d.
When the engagement hole of the detection sensor 52 is fitted into the device, 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 bearing portions 55a and 55.
b. Thus, the assembly of 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 through the sleeve 63 of the pair of bearings 61a 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 of the sub-unit guide shaft 33 provided on the back side of the base unit chassis 21
Fit into 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.
The two ends of the guide shaft 60 held on one side are
7a and 57b. 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 device 20 is completed.

According to the disk drive device 20 having such a configuration, for example, the reproduction and / or recording operation of the optical disk 41 can be performed as follows.
First, the optical disk 41 is mounted on the turntable 24. This operation can be performed as follows. For example, by gripping a plurality of locations on the outer peripheral edge of the optical disc 41,
The center hole is aligned with the fitting portion 24a of the turntable 24. Then, the optical disk 41 is lightly pressed to retreat the three lock claws 24c and pass through the center hole.
As a result, the three lock claws 24c passing through the center hole
However, the chucking is performed by riding on three places at the edge of the center hole.

Next, by driving the spindle motor 23, the optical disc 4 is integrated with the turntable 24.
Rotate 1 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 in which the slide member 61 approaches 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 41 by the operation of the head feed mechanism. At this time, the laser light emitted from the optical pickup 62 is emitted from the objective lens 70 of the optical head 62a toward the information recording surface of the optical disk 41. 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 board 73 and the like. As a result, the wind generated by the rotation of the fins 42 cools the optical pickup 62, the spindle motor 23, and the like, which are heat sources, and can prevent the temperature of these components from rising. 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.

In the above embodiment, the spindle motor 2
Although the example in which the fin 42 is provided between the turntable 23b and the turntable 24 to reduce the size and thickness of the base unit has been described, the fin 42 is provided on the opposite side of the turntable 24 of the turntable 23b of the spindle motor 23. Fins may be provided. For example, while the rotating shaft 23c is made to penetrate through the fixed portion 23a, the lower end portion thereof is provided with the structure shown in FIG.
The fin 42a shown in FIG. 4 and the propeller 43 shown in FIG. In this case, for example, it is possible to blow the air generated by the rotation of the fins or the propellers onto the wiring board arranged on the lower surface of the base unit to cool the wiring board.

The disk drive device 20 having the above-described configuration, operation, and effect is, for example, shown in FIGS.
It can be used by attaching to an electronic device as shown in FIG. FIGS. 16 and 17 show a digital video disc camera showing a specific example of an electronic apparatus. The digital video disk camera 80 uses a recordable optical disk 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 disk camera 80
Has a configuration as shown in FIG. In FIG. 18, 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 stored, a solid-state image pickup device (CCD) 83b disposed on the opposite side of the lens holder 83a from the objective lens, and the like. . 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, behind the wiring board 93c, the disk drive device 20 attached to the base frame 94 is provided.

The means for attaching the disk drive device 20 to the base frame 94 has a structure as shown in FIGS. 19 and 20. That is, the base frame 94 is formed of a sheet metal plate having a larger planar shape than the disk drive device 20. This base frame 9
A plurality of leg pieces 94a for attaching to the camera frame are provided on the peripheral edge of No. 4. Further, support pieces 94b for supporting the disk drive device 20 are provided at three places of the base frame 94. The three support pieces 94b are arranged substantially evenly so as to support the disk drive device 20 from three directions.
Has an insulator 9 formed of a rubber-like elastic body.
4c is attached.

In order to support the disk drive device 20 via such a support piece 94b, support arms 21f projecting sideways are provided at three places of the base unit chassis 21.
Is provided. An insulator 94c is mounted on each of the support arms 21f, and the disk drive device 20 is elastically supported by the base frame 94 by engaging with the support piece 94b in the mounted state.

The disk drive device 20 supported by the base frame 94 is mounted inside the rear camera frame 95. The rear camera frame 95 has a shape that overlaps the front camera frame 86 in the front-rear direction, and the camera body is configured by assembling the two camera frames 86 and 95 in an overlapping manner. The camera body includes the above-described cylindrical body 86a in which the lens assembly 83 and the like are stored, and a grip 86b formed continuously on one side of the cylindrical body 86a.

As shown in FIG. 17, 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 has a display window 9.
7a is provided, and a liquid crystal display device 96 is mounted on the display window 97a. Locking and unlocking of the disc mounting lid 97 can be performed by an open / close switch 95b provided on a 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 lid 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 20 which is exposed, or the optical disc previously mounted is removed. .

At this time, after mounting the optical disk in the disk drive device 20, 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.

In this embodiment, an example in which the disk drive device 20 is applied to the digital video disk camera 80 has been described, but the present invention can also be used for the following electronic devices. For example, CD player, DV
The present invention can be applied to a D 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.

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 other various disk-shaped recording media. Of course, you can do that. Thus, the present invention can be variously modified without departing from the spirit thereof.

[0088]

As described above, claim 1 of the present application.
According to the disk drive device described above, since the propeller or the fin is provided on the rotating shaft of the spindle motor, the fin or the propeller can be integrally rotated by driving the spindle motor to generate wind. By blowing this wind onto heating elements such as optical pickups, spindle motors, and feed motors, heat is removed from the heating elements to cool them, preventing the temperature of the heating elements from rising, and reducing the deterioration of the properties of the heating elements due to the temperature rise. Can be prevented. As a result, irradiation of laser light can be stabilized, so that a decrease in performance during recording and reproduction of an information signal can be suppressed, and use at a high temperature can be made possible. Therefore, it is possible to obtain an effect that it can be used for a high-density disk that requires a high accuracy of laser beam irradiation.

According to the disk drive device described in claim 2 of the present application, since the propeller or the fin is configured to extend radially outward around the center of rotation of the rotating shaft, the wind is reduced while having a simple structure. Generate it efficiently,
The effect is obtained that the heating element can be forcibly cooled.

According to the disk drive device described in claim 3 of the present application, the propeller or the fin is configured to extend radially outward from a position deviated from the rotation center of the rotary shaft. The effect that the wind can be efficiently generated and the heating element can be forcibly cooled can be obtained.

According to the disk drive of the fourth aspect of the present invention, since the propeller or the fin is provided integrally with the turntable, the number of parts can be reduced and the number of assembling steps can be reduced to improve the productivity. The effect that improvement can be achieved is obtained.

According to the disk drive device of the fifth aspect of the present invention, since the air passage is provided in the base unit chassis on which the spindle motor is supported, the wind generated by the rotation of the propeller or the fin is passed through the air passage. The effect is obtained that the heating element is guided to the heating element and the wind is blown to the heating element, so that the heating element can be efficiently cooled.

According to the disk drive device described in claim 6 of the present application, since the wind passage is formed by the outer peripheral wall and the wind passage wall, the wind generated by the rotation of the propeller or the fin is collected in the wind passage. The heating element is guided to the heating element and the wind is efficiently blown to the heating element, so that the heating element can be cooled efficiently.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a disk drive device according to the present invention, as viewed from an upper surface side.

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

FIG. 3 is a front view of the disk drive device shown in FIG.

FIG. 4 is a bottom view of the disk drive device shown in FIG.

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

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

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

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

9 is a cross-sectional view of the disk drive device shown in FIG. 2, taken along line XX.

FIG. 10 is a left side view of the disk drive device shown in FIG.

FIG. 11 is a sectional view taken along line YY of the disk drive device shown in FIG. 2;

FIG. 12 is a sectional view taken along line ZZ of the disk drive device shown in FIG. 2;

FIG. 13 is a plan view of the disk drive device 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.

FIG. 15 is a plan view showing an embodiment of a fin and a propeller according to the disk drive of the present invention.

FIG. 16 is a side view showing an embodiment of a digital video disk camera using the disk drive device of the present invention.

FIG. 17 is a plan view showing an embodiment of a digital video disk camera using the disk drive device of the present invention.

FIG. 18 is an exploded perspective view showing an embodiment of a digital video disk camera using the disk drive device of the present invention.

FIG. 19 is a plan view showing a state where the disk drive device shown in FIG. 1 is attached to a base frame.

20 is a front view showing a state where the disk drive device shown in FIG. 1 is attached to a base frame.

FIG. 21 is a perspective view showing a conventional disk drive device.

[Explanation of symbols]

Reference Signs List 20 disk drive device, 21 base unit chassis, 22 base unit subchassis, 2
3 spindle motors, 24 turntables, 2
5 optical pickup device, 26 feed screw shaft, 2
7 feed motor, 28 opening, 32 motor housing, 33 sub guide shaft, 35 air passage, 36
Motor base plate, 41 optical disk (disk-shaped recording medium), 42, 42a fin, 43 propeller, 48 output gear, 54 drive gear, 60 guide shaft, 61 slide member, 62 optical pickup, 67 feed nut, 80 digital video disk camera

Claims (6)

[Claims] 1. A disk drive device comprising: a turntable on which a disk-shaped recording medium is removably mounted; and a spindle motor having a rotary shaft to which the turntable is mounted. And a propeller or fin that is integrally rotated with the rotating shaft. 2. The disk drive device according to claim 1, wherein the propeller or the fin is provided so as to extend radially outward around a rotation center of the rotation shaft. 3. The disk drive device according to claim 1, wherein the propeller or the fin is provided so as to extend radially outward from a position deviated from the rotation center of the rotation shaft. 4. The disk drive device according to claim 2, wherein the propeller or the fin is integrally provided on a lower surface of the turntable. 5. A base unit chassis for supporting the spindle motor, wherein the base unit chassis surrounds the propeller or the fin and guides wind generated by rotation of the propeller or the fin to the heating element. 2. The disk drive device according to claim 1, wherein an air passage is provided. 6. The air passage has an outer peripheral wall that covers the outer peripheral surface of the propeller or the fin over substantially half a circumference, and an air passage wall that is continuous on both sides of the outer peripheral wall and that collects the wind and guides the air to the heating element. 6. The disk drive device according to claim 5, wherein the disk drive device comprises: