JPH07130140A - Disk drive device - Google Patents

Abstract

PURPOSE:To improve productivity by making the parts common in use as many as possible when the thin type and thick type devices are produced. CONSTITUTION:In the case of a thin type spindle motor 70, a motor substrate 71 is mounted direct on a main chassis 5 by screws 73, and also a pair of side plates 6a, 6b without step parts is mounted on the main chassis 5 by screws 82. In the case of a thick type spindle motor 70', a motor substrate 71 is mounted by the screws 73 through spacers 78, and also a pair of side plates 6a', 6b' provided with step parts 81 is mounted on the main chassis 5 by the screws 82.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk drive device using a flat spindle motor.

[0002]

2. Description of the Related Art The market for disk drive devices is
There are various types depending on the cost, and it is necessary to efficiently design a model that can quickly respond to market needs in such a situation. An important element that determines the thickness and cost of the disk drive device is a spindle motor, and cost reduction will occur if the spindle motor is made thinner. That is, when designing two types of a low-priced device and an expensive device, it is necessary to design a device using a flat thickness spindle motor and a device using a flat thin spindle motor.

26 (a) and 26 (b) show a general structure of a conventional disk drive device. FIG. 26
In (a) and (b), the chassis 2 is composed of a flat plate-shaped main chassis 5 and a pair of left and right side plates 6a and 6b, and a large hole 75 is formed in the main chassis 5. The spindle motor 70 is fixed on a motor board 71, and the motor board 71 is attached with screws 73 from the lower surface side of the main chassis 5.
It is concluded with. The spindle motor 70 is arranged in the large hole 75, and a turntable 76 is provided on the upper surface of the rotor of the spindle motor 70.

The head carriage 35 is the main chassis 5
A head arm 39 is provided on the upper end of the head carriage 35 so as to be slidable in the disk radial direction. Head arm 39 and head carriage 3
An upper head element 42 and a lower head element 43 are provided at positions vertically opposed to 5, respectively. The height difference between the turntable 76 and the lower head element 43 is set to a predetermined value H.

Here, when designing using a spindle motor 70 'which is thicker than the spindle motor 70,
As shown by the phantom line, the predetermined value H of the height difference cannot be maintained simply by replacing the spindle motor 70 '. In addition, since the mounting position of the disc cassette and the like are different, it is necessary to change the design accordingly. For this reason, conventionally, when the thin spindle motor 70 is used and when the thick spindle motor 70 ′ is used, the components such as the main chassis 5 having different sizes are separately designed.

[0006]

However, the use of different parts including the main chassis 5 between the thin type device and the thick type device not only increases the cost of the parts but also requires a plurality of mounting jigs and the like. Since it has to be prepared and converted depending on the type of device, there is a drawback that productivity is poor.

Therefore, it is an object of the present invention to provide a disk drive device having good productivity by sharing as many parts as possible when making a thin device and a thick device.

[0008]

A disk drive device of the present invention for achieving the above object comprises a main chassis and a pair of side plates attached to both sides of the main chassis, and is provided with a turntable. A disk drive device in which a spindle motor is fixed to a motor board, the motor board is attached to the lower surface side of the main chassis via a screw, and the lower surfaces of the pair of side plates are located below the lower surface of the motor board. In the case where the spindle motor is thin, it is mounted between the motor board and the main chassis with a screw without a spacer, and the pair of side plates is provided with a step portion for increasing the height to the lower surface. If the spindle motor is of a thick type, which is not provided, the motor board and the main chassis With attached with screws interposed spacers and the pair of side plates is to use those having a stepped portion to increase the height to the lower surface.

[0009]

The relative position of the turntable with respect to the main chassis is the same when a thin spindle motor is used and when a thick spindle motor is used. Therefore, all parts assembled on the main chassis including the main chassis are It can be shared, and it suffices to change the motor board (with or without spacers) and the pair of side plates.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 is an exploded perspective view of the disk drive device, FIG.
FIG. 3 is a plan view of the same (with the cover removed), and FIG.
5 and FIG. 5 show side views thereof (state with the cover removed), respectively.

(External Case) In FIGS. 1 to 5, the external case 1 includes a chassis 2, a cover 3 and a front panel 4.
It consists of and. The chassis 2 is made of aluminum die-cast and has excellent rigidity.
A pair of left and right side plates 6a, 6 fastened together (shown in FIG. 9)
b and. The cover 3 is locked to the pair of side plates 6a and 6b, and covers the upper side and the rear side of the chassis 2. The front panel 4 is arranged in a front opening formed by the chassis 2 and the cover 3, and the front panel 4 has a cassette opening 7
Are formed.

(Slide Member) The slide member 8 is composed of an upper surface portion 9 and side surface portions 10a and 10b formed by bending both sides of the upper surface portion 9 downward. Large holes and notches are formed for Guide pins 11 are provided at appropriate positions on the pair of side surface portions 10a and 10b, and the guide pins 11 are inserted into the horizontal guide holes 12 of the pair of side plates 6a and 6b. The slide member 8 has a pair of side surface portions 10a and 10b while the guide pins 11 are regulated by the horizontal guide holes 12.
By sliding each lower end surface of the above on the main chassis 5, it slides between the insertion corresponding position of FIGS. 2 and 4 and the mounting corresponding position of FIGS. 3 and 5. One ends of the tension coil springs 12 are hooked at symmetrical positions on the upper surface portion 9, and the other ends of the pair of tension coil springs 12 are hooked on cassette holders 15 described below, respectively. The slide member 8 is biased toward the mounting corresponding position side in FIGS. 3 and 5 by the spring force of the pair of tension coil springs 12.

Cam holes 13 are respectively formed at a total of two positions on the front side and the rear side of the pair of side surface portions 10a and 10b, and the center portion of each cam hole 13 is formed as an inclined portion. Reference numeral 14 is a manual eject operation unit, which is used when the auto eject is defective.

(Cassette holder) Cassette holder 15
Are arranged between the slide member 8 and the chassis 2. The cassette holder 15 includes an upper surface portion 16 and the upper surface portion 1.
A pair of side surface parts 17 in which both sides of 6 are bent downward respectively.
a, 17b and a pair of bottom edge portions 18 in which lower portions of the pair of left and right side surface portions 17a, 17b are further bent inward, respectively.
The disk cassette DK is configured to be insertable in a space surrounded by the upper surface portion 16, the pair of side surface portions 17a and 17b, and the pair of bottom edge portions 18a and 18b.

A guide pin 19 is provided at the center of each of the pair of left and right side portions 17a and 17b, and each guide pin 19 is a vertical guide hole 20 of the pair of side plates 6a and 6b.
Has been inserted into. The cassette holder 15 is restricted by the vertical guide hole 20 and is movable only in the vertical direction. In addition, guide pins 21 are provided at a total of two locations in front of and behind the pair of left and right side portions 17a and 17b,
The guide pins 21 are inserted into the cam holes 13 of the slide member 8. Therefore, when the slide member 8 slides, the cassette holder 15 moves up and down while being regulated by the cam hole 13, and is located at the insertion corresponding position of the slide member 8 in the insertion position of FIG. 4 and at the mounting corresponding position of the slide member 8 of FIG. Located in the mounting position. At the insertion position, the height is the same as that of the cassette opening 7 of the front panel 4, and the disc cassette DK can be inserted into the cassette holder 15 or the disc cassette DK in the cassette holder 15 can be ejected. At the mounting position, the disc of the disc cassette DK is chucked on the turntable described below.

(Slider Lock Mechanism) The slider lock mechanism A is a support shaft 2 on the rear end side of the upper surface of the cassette holder 15.
2 has a trigger arm 23 supported on the support shaft 23.
Rotate to and from the unlocked position. Trigger arm 23
A spring retaining portion 24 is provided on the upper surface of the, and one end of a screw spring 25 is engaged with the spring retaining portion 24. The trigger arm 23 is biased toward the lock position by this spring force.

A shutter opening / closing member 26 is provided on one end side of the trigger arm 23.
6 projects downward from the hole 27 of the cassette holder 15. A fan-shaped portion 28 is provided on the other end side of the trigger arm 23, and a lock piece 29 provided at the rear end of the slide member 8 is disengaged from the end surface of the fan-shaped portion 28. That is, the slide member 8
Is positioned at the insertion corresponding position, the slide member 8 pulls the tension coil spring 12 at the lock position of the trigger arm 23.
The cassette holder 15 is positioned at the insertion position by holding the position corresponding to the insertion against the insertion. Then, when the disc cassette DK is inserted while pressing the shutter opening / closing member 26 with its front end surface, the trigger arm 23 is displaced from the locked position to the unlocked position by the spring force of the torsion spring 25. Then, the lock piece 29 of the slide member 8 is disengaged from the fan-shaped portion 28 of the trigger arm 23, and the slide member 8 is displaced by the spring force of the tension coil spring 12 to the mounting corresponding position.
Along with this, the cassette holder 15 is displaced to the mounting position.

(Head Mechanism) The head mechanism B has a head casing 35 arranged at the center of the rear side of the chassis 2, and a bearing portion 36 is provided on one side of the head carriage 35.
(Shown in FIG. 14) are provided. A guide shaft 37 (shown in FIG. 14) is inserted into the hole of the bearing portion 36, and the head carriage 35 is configured to be slidable along the guide shaft 37 in the disk radial direction (direction of arrow A).
An engagement pin (not shown) is provided on the other side of the head carriage 35, and the engagement pin is arranged in the spiral groove of the lead screw 38. This lead screw 38
Is fixed to the rotary shaft of the head moving motor M ₁ . Driven by head moving motor M ₁ , lead screw 3
When 8 rotates, the head carriage 35 moves the guide shaft 37.
It is guided by and moves in the direction of arrow A.

The head arm 39 is a head carriage 35.
Is supported via a leaf spring 40 (shown in FIG. 14) and the tip end side of the head arm 39 is urged downward by the spring force of a spring 41 (shown in FIG. 14). An upper head element 42 and a lower head element 43 are provided at positions where the tip end side of the head arm 39 and the head carriage 35 face each other. Further, a rod portion 44 is provided on the tip side of the head arm 39, and the head arm 39 moves up and down when the rod portion 44 contacts a rod arm 50 described below.

The reference position detection sensor 45 is arranged in the vicinity of the lead screw 38 and detects the reference position of the head carriage 35 by detecting the detected portion 46 of the head carriage 35.

(Head Arm Lifting Mechanism) The head arm lifting mechanism C has a load arm 50 and a load slider 51 arranged on the upper surface of the cassette holder 15. The load arm 50 is rotatably provided between the lowered position (state of FIG. 1) and the raised position of the lift surface 50a, and is biased to the lowered position side by the spring pressure of the leaf spring 52.
The lift surface 50a of the load arm 50 is the cassette holder 1
5 is arranged so as to face the head insertion hole 53, and the rod 44 of the head arm 39 is positioned on the lift surface 50a.

The load slider 51 is slidably provided between the first position shown in FIG. 3 and the second position shown in FIG. 2 and is biased toward the first position by the spring force of the tension coil spring 54. The load slider 50 has a load arm 50.
55 for engaging with the pressing portion 5 of the slide member 8
6 and a pressed portion 57 that is pressed by 6.

When the cassette holder 15 is located at the insertion position, the load slider 51 is located at the second position in FIG. 2 against the spring force of the tension coil spring 54, so that the load arm 50 is located at the raised position. To do. Slide member 8
Is displaced to the mounting corresponding position and the cassette holder 15 is displaced to the mounting position, the load slider 51 is displaced to the first position of FIG. 3 by the spring force of the tension coil spring 54, and as a result,
The load arm 50 is displaced to the lowered position by the spring force of the leaf spring 52. That is, the upper head element 42 is the cassette holder 15
In addition to the ascending / descending stroke of the load arm 50, the ascending / descending stroke of the load arm 50 is additionally performed. At the insertion position of the cassette holder 15, the shutter 5 of the disc cassette DK is inserted.
The upper head element 42 is located at the upper position so as not to come into contact with the disk 8, and at the mounting position of the cassette holder 15, the upper head element 4 is pressed against the upper surface of the disk of the disk cassette DK.
2 is displaced to the lower position.

(Auto Eject Mechanism) The auto eject mechanism D is a gear drive that is fixed to the main chassis 5.
A motor block 60 is provided. The geared motor block 60 has an eject motor M as shown in detail in FIG.
₂ and a gear group 62 for reducing the rotation of the motor M ₂ are provided. An output cam 64 is provided on the output gear 63 of the gear group 62, and the output cam 64 moves on the rotation locus by the rotation of the output gear 63.

The cam receiving surface 65 of the slide member 8 is formed by extending the rear end side of one side surface portion 10b and bending the end portion of this extended portion. And FIG.
As shown in FIG. 5, the cam receiving surface 65 is located outside the retracting section of the output cam 64, that is, in the mounting position.
The slide member 8 except the section where the slide member is displaced to the insertion position.
It is structured so as not to disturb the slide of.

Further, as shown in detail in FIGS. 6 and 7,
The rotation detection switch 66 is a geared motor block 6
Circular cam 6 which is provided at 0 and rotates together with the output gear 63.
Turn on / off by 7. The circular cam 67 has a notch surface 6
7a is formed, the push rod 66a of the rotation detection switch 66 is turned off in a section where the push rod 66a slides on the notch surface 67a, and is turned on in other sections.

Further, the drive circuit of the eject motor M ₂ is shown in FIG. In FIG. 25, when the eject button 124 is pressed, the microcomputer 123 detects whether the cassette-in switch 68 is in the on state. If the cassette-in switch 68 is on, a start command signal is output to the start current generation circuit 125, and the start current generation circuit 125 outputs a start current to the eject motor M ₂ . This starting current is output for a predetermined time or until the cassette-in switch 68 is turned off. Further, the eject motor M ₂ is configured such that the drive current is supplied even when the rotation detection switch 66 is in the ON section.

The cassette-in switch 68 shown in FIG. 1 is turned on in the process of the disc cassette DK being displaced from the insertion position to the mounting position, and detects whether or not the disc cassette DK is located at the mounting position. 8 shows the cassette-in switch 6 corresponding to the rotational position of the output cam 64.
8, the states of the rotation detection switch 66 and the like are shown.

(Disc Rotation Mechanism) Disc Rotation Mechanism E
As shown in detail in FIG. 9, has a flat and thin spindle motor 70, and the spindle motor 70 is provided on a rigid motor substrate 71. A wiring pattern is printed on the upper surface of the motor substrate 71, and electronic components are mounted to form a drive circuit for the spindle motor 70 and the like. A screw insertion hole 72 is formed at an appropriate position on the motor board 71, and a screw 73 inserted through the screw insertion hole 72 is screwed into a screw screw insertion hole 74 of the main chassis 5. That is, the motor board 71 is directly fixed to the main chassis 5 by the fastening force of the screws 73. And FIG.
As shown in FIG. 1 (a), the lower surfaces of the pair of side plates 6a and 6b are configured to be slightly lower than the lower surface of the motor board 71. This prevents the motor board 71 from contacting other members.

The thin spindle motor 70 is arranged in the large hole 75 of the main chassis 5, and a turntable 76 is provided on the upper surface of the rotor of the spindle motor 70. Then, as shown in FIG. 12A, the height difference between the turntable 76 and the lower head element 43 is set to a predetermined value H.

On the other hand, a flat thickness type spindle motor 70 '
The case of applying is shown in FIG. In FIG. 10, the flat thickness type spindle motor 70 'is provided on the motor board 71' in the same manner as described above.
A hole 77 larger than the screw insertion hole is formed at an appropriate position. One end side of a spacer 78 is fixed to each hole 77, and as a fixing means, there are means such as press fitting and caulking. A screw insertion hole 79 is formed at the center of the spacer 78, and a screw head storage chamber 80 is formed at one end of the screw insertion hole 79. The screws 73 inserted through the screw insertion holes 79 are screwed into the screw screw holes 74 of the main chassis 5, and the heads 73 a of the screws 73 are arranged in the screw head storage chamber 80.

That is, the motor substrate 71 is fixed to the main chassis 5 via the spacer 78 by the fastening force of the screw 73. The head 73a of the screw 73 is the motor board 71.
Since it does not protrude downward, it is possible to change the type of the screw 73 according to the purpose and contribute to reducing the thickness of the drive device.

Different from the above, the pair of left and right side plates 6a ', 6b' are provided with a stepped portion 81 which is one step higher than the other portions, and each stepped portion 81 is in contact with the main chassis 5. It is fixed with a screw 82. And FIG.
As shown in (b), the lower surfaces of the pair of side plates 6a 'and 6b' are configured to be slightly lower than the lower surface of the motor board 71 'by the step 81.

Further, the thick spindle motor 70 'is disposed in the large hole 75 of the main chassis 5, as shown in FIG.
As shown in (b), the relative position of the thick spindle motor 70 'with respect to the main chassis 5 is the same as above, and the height difference between the turntable 76 and the lower head element 43 depends on the height of the spacer 78. Same predetermined value H
Is set to.

That is, a motor substrate is used when designing a disk drive device using a low-priced flat spindle motor 70 'and when designing a disk drive device using an expensive flat thin spindle motor 70'. 7
1, 71 '(with or without spacer 78) and a pair of side plates 6a,
6b, 6a ', 6b' (presence or absence of the stepped portion 81) need only be changed, and all other parts can be shared. Although two types of cases have been described in this embodiment, the height of the spacer 78 and the height of the step portion 81 of the side plate can be changed to apply to motors of all heights.

On the other hand, as shown in FIGS. 9 and 10, one side plate 6a, 6a 'has two screws 82 and the other side plate 6
Although b and 6b 'are fastened with one screw 82 respectively, this makes it possible to absorb the strain when mounting on the computer side. Also, a pair of side plates 6
Although a, 6b, 6a ', 6b' is provided with a mounting portion to the computer side, mounting position requests (width dimension request, screw hole position request) to various computers can be performed only by converting a pair of side plates. .

(Printed Circuit Board) As shown in FIGS. 13 to 15, the printed circuit board 83 is provided between the head carriage 35 and one side plate 6a and at the head carriage 35.
Is disposed above the guide shaft 37 in a state of floating with respect to the main chassis 5. The one side plate 6a is provided with fixing grooves 84 and 85 at two positions, and the concave portions 86 and 87 of the printed circuit board 83 are inserted into the fixing grooves 84 and 85, respectively. Further, boss portions 88 and 89 are erected at two locations on the upper surface of the main chassis 5, and these boss portions 88 and 89 are provided.
A printed circuit board 83 is placed on the upper surface of the. A screw screw hole (not shown) is formed in the boss portion 89 located farther than the one side plate 6a, and a screw 91 is screwed into the screw screw hole from above the printed circuit board 83. That is, the printed circuit board 83 is fixed to the chassis 2 by the two convex portions 86 and 87 locked to the side plate 6a, the boss portions 88 and 89, and the single screw 91. Therefore, since it is necessary to secure only the spacer for fastening the single screw 91 to the printed circuit board 83, the mount area can be increased. Further, since the printed circuit board 83 is disposed above the guide shaft 37 of the head carriage 35, the printed circuit board 83 is arranged as shown in FIG.
Therefore, the area of the printed circuit board 83 can be increased by the range indicated by virtual hatching. Furthermore, since the printed circuit board 83 is arranged in a state of floating above the main chassis 5, electronic components can be mounted on both sides as described below, and the mounting area is simply doubled.

Various electronic components are mounted on the upper surface of the printed circuit board 83, and various connectors are included therein. The spindle motor connector 92 is arranged on the front side of the printed board 83 so as to face the connector 93 of the motor board 71, and the connectors 92 and 93 are connected via a flexible board 94. The head connector 95 is arranged on the front side of the printed board 83 near the head carriage 35, and is connected to one end of a flexible board 96 guided by the head carriage 35.
The reference position detection sensor connector 97 is arranged on the rear side of the printed circuit board 83 near the head moving motor M _{1 and} guided by the reference position detection sensor 45 to the flexible board 98.
One end of is connected. The eject motor connector 99 is provided on the printed circuit board 8 separated from the head moving motor M _1.
One end of the flexible substrate 100, which is disposed on the rear side of the third substrate _{3 and} is guided by the eject motor M _2, is connected.
The interface connector 101 is arranged on the rear side of the printed circuit board 83 together with the reference position detection sensor connector 97 and the eject motor connector 99.

Various electronic components are also mounted on the lower surface of the printed circuit board 83, and the head moving motor connector 102 is included therein. The head moving motor connector 102 is arranged on the rear side of the printed circuit board 83 near the head moving motor M _{1 and} is connected to the head moving motor M _1.
One end of the flexible substrate 103 guided from ₁ is connected.

FIG. 16 shows a modification in which the printed circuit board 83 is fixed. In FIG. 16, in this modified example, a boss portion is not provided near one side plate, but a lower surface support protrusion 85a is provided in the fixing groove 85, and the lower surface support protrusion 85a allows the lower surface of the printed circuit board 83 to be provided. Is supported. The other structure is the same as that of the above embodiment.

(Flexible supporting means) As shown in FIG.
3 is provided between the head moving motor M ₁ and the printed circuit board 83.
The flexible substrates 98, 100, 103 of the plate are arranged, and the uppermost flexible substrate 100 is pressed by the flexible support portion 104 from above. Flexible support 10
Reference numeral 4 is formed by bending a part of the cover 3. The flexible support portion 104 prevents the flexible substrate 100 from floating as shown by a virtual line, and can prevent contact with the head carriage 35 and the like. Further, according to this flexible support means, when the cover 3 is attached to the chassis 2, the flexible support portion 104 simultaneously supports the flexible substrates 100 and 98, so that workability is good.

(Flexible Substrate) The flexible substrate 98 of the reference position detecting sensor 45, as shown in FIG.
Backing plates 105 and 106 are attached to one surface on both end sides, and the backing plates 105 and 106 reinforce heat, strength, and the like. On one of the backing plates 105, a small hole 107 is formed and a step portion 108 is formed. By inserting, for example, a pin into the small hole 107 and applying an external force via the pin, the inserting / withdrawing force with respect to the reference position detection sensor connector 97 can be increased, which facilitates the inserting / withdrawing. Further, the step portion 108 serves as a guide for the completion of insertion into the reference position detection sensor connector 97, and the insertion work can be performed reliably.

On the other backing plate 106, in addition to the small hole 109 similar to the above, a positioning small hole 110 and a terminal insertion small hole 1 are provided.
And 11 are formed. Then, the positioning small hole 11
Small hole for terminal insertion 1 with pin inserted in 0 and temporarily supported
The terminal pins protruding from 11 and the terminals of the flexible substrate 103 are soldered. The other end of the backing plate 106 is formed as an inclined surface 112 of 45 degrees, and this inclined surface 112 serves as a guide for bending the flexible substrate 103. Therefore, by bending along the inclined surface 112, the bending operation of the flexible substrate 103 can be performed accurately and easily.

(Operation of cassette mounting / eject operation)
18 to 24 are conceptual diagrams showing respective steps of the cassette loading / auto ejecting operation, and the cassette loading / auto ejecting operation will be described based on FIGS. 18 to 24. Note that the operation of the head arm elevating mechanism C and the like is omitted for simplification of description.

When the cassette holder 15 is at the insertion position of FIG. 18 and the disc cassette DK is inserted to the insertion completion position of the cassette holder 15, the slider lock mechanism A is released. Then, the slide member 8 is displaced to the mounting corresponding position by the spring force of the tension coil spring 12, and accordingly, the cassette holder 15 is displaced to the mounting position of FIG.

When the reproduction / recording operation is completed and the eject button 124 is pressed, the microcomputer 123 supplies the starting current for a predetermined time on condition that the cassette-in switch 68 is in the ON state. The energization of this starting current causes the output gear 64 together with the output gear 63 to rotate clockwise from the initial position. When the output cam 64 enters the retracted section, as shown in FIG. 20, the output cam 64 comes into contact with the cam receiving surface 65 to slide the slide member 8 against the spring force of the tension coil spring 12, and the slide causes the cassette to slide. Holder 1
5 is also displaced to the insertion position side.

On the other hand, the output cam 64 passes the on / off point (shown in FIG. 7) of the rotation detection switch 66 within a predetermined time of the starting current, and the rotation detection switch 66 is turned on to cause the eject motor M ₂ Rotation continues. Then, as shown in FIG. 21, when the output cam 64 reaches the end point of the retracted section, the slide member 8 is displaced to the insertion corresponding position, the cassette holder 15 is displaced to the insertion position, and the slider lock mechanism A is locked. And hold this state. The disc cassette DK is ejected from the cassette holder 15 displaced to the insertion position. Further, as shown in FIG. 22, the eject motor M ₂ stops its rotation when the rotation detection switch 66 is turned off, and after the eject motor M ₂ is turned off, the output gear 63 is rotated by the inertia force, and the output cam 64 is rotated.
Stops at approximately the initial position.

In the auto eject operation process,
The power is turned off for some reason before the rotation detection switch 66 is turned off (for example, the operator turns off the power by mistake when the auto-eject operation is completed when the cassette holder 15 is displaced to the insertion position). ), The eject motor M ₂ is turned off, and the output cam 64 stops before the initial position, as shown in FIG. When the disc cassette DK is inserted to the insertion completion position of the cassette holder 15 in this state, the slider lock mechanism A is released. Then, the slide member 8 is displaced to the mounting corresponding position side by the spring force of the tension coil spring 12. Here, the cam receiving surface 65 of the slide member 8 is configured so that the output cam 64 does not engage with the output cam 64 except in the retracted section. Therefore, as shown in FIG.
Slide to the mounting position without being disturbed by 4.
The cassette holder 15 is displaced to the mounting position. Therefore,
Recording / playback becomes possible, and the cassette-in switch 68 is also turned on.

When the reproduction / recording operation is completed and the eject button is pressed, the cassette-in switch 68 is in the on state, so that the microcomputer energizes the startup power supply for a predetermined time. By energizing the starting power source, the output gear 63 and the output cam 64
Is rotated, the auto eject operation is executed by the same operation as described above.

In this embodiment, when the eject button is turned on, the starting power source is energized for a predetermined time. However, the starting power source may be energized until the cassette in switch 68 is turned off. This configuration is advantageous in that the reliability of the auto eject operation is improved because the cassette-in switch 68 is turned off after the rotation detection switch 66 is turned on.

[0051]

As described above, according to the present invention, when the spindle motor is a thick type, a spacer is interposed between the motor substrate and the main chassis to attach them with screws, and a pair of side plates are provided with a predetermined shape. Since the one with the step is used,
The position of the turntable relative to the main chassis is the same when a thin spindle motor is used and when a thick spindle motor is used, and the main chassis and each component mounted on the main chassis can be shared, and the motor board ( Since it suffices to change the presence / absence of a spacer) and the pair of side plates, most of the parts are of one type, and the mounting jig is of one type, so that the productivity is good.

Further, by changing the pair of side plates, it is possible to prevent the motor board from inadvertently contacting other parts, and it is possible to freely change the attachment portion of the pair of side plates to the computer side according to the request. There is also an effect.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a disk drive device (embodiment).

FIG. 2 is a plan view (embodiment) of the disk drive device in the insertion position.

FIG. 3 is a plan view (embodiment) of the disk drive device in the mounting position.

FIG. 4 is a side view (embodiment) of the disk drive device in the insertion position.

FIG. 5 is a side view (embodiment) of the disk drive device in the mounting position.

FIG. 6 is a cross-sectional view of a geared motor block (embodiment).

FIG. 7 is a diagram showing a positional relationship between a rotation detection switch and a circular cam (embodiment).

FIG. 8 is a diagram (embodiment) showing a timing relationship between an output cam and each switch.

FIG. 9 is an exploded perspective view of a disk rotation mechanism (example).

FIG. 10 is an exploded perspective view of a disk rotating mechanism (a modified example of a thick motor).

11A is a sectional view of a disk rotating mechanism in the case of a thin motor, and FIG. 11B is a sectional view of a disk rotating mechanism in the case of a thick motor.

12A is a sectional view of a disk rotating mechanism in the case of a thin motor, and FIG. 12B is a sectional view of a disk rotating mechanism in the case of a thick motor.

FIG. 13 is a perspective view of the vicinity of a printed circuit board (Example).

FIG. 14A is a plan view of the vicinity of a printed circuit board, and FIG.
Is a sectional view thereof, and (c) is a side view thereof (embodiment).

FIG. 15 is a rear view of the vicinity of the printed circuit board (Example).

16A is a plan view of the vicinity of a printed circuit board, FIG.
Is a sectional view thereof, and (c) is a side view thereof (modification).

FIG. 17A is a developed perspective view of a flexible substrate,
(B) is a plan view of a flexible substrate in use (example).

FIG. 18 is a conceptual diagram (embodiment) showing steps of cassette mounting and auto-eject operation.

FIG. 19 is a conceptual diagram (embodiment) showing steps of cassette mounting and auto-eject operation.

FIG. 20 is a conceptual diagram (embodiment) showing steps of cassette mounting and auto-eject operation.

FIG. 21 is a conceptual diagram (embodiment) showing steps of cassette mounting and auto-eject operation.

FIG. 22 is a conceptual diagram (embodiment) showing steps of cassette mounting and auto-eject operation.

FIG. 23 is a conceptual diagram (embodiment) showing steps of cassette mounting and auto-eject operation.

FIG. 24 is a conceptual diagram (embodiment) showing steps of cassette mounting and auto-eject operation.

FIG. 25 is a drive circuit diagram of an eject motor (embodiment).

26A and 26B are cross-sectional views (conventional example) of a disk rotating mechanism in the case of a thin motor.

[Explanation of symbols]

 2 ... Chassis 3 ... Main chassis 6a, 6b, 6a ', 6b' ... Side plate 70, 70 '... Spindle motor 71, 71' ... Motor board 73, 82 ... Screw 76 ... Turntable 78 ... Spacer 81 ... Step portion

Claims (1)

[Claims] 1. A chassis is composed of a main chassis and a pair of side plates attached to both sides of the main chassis, and a spindle motor provided with a turntable is fixed to a motor board, and the motor board is provided on the lower surface side of the main chassis. In the disk drive device, wherein the pair of side plates are attached to each other via screws, and the lower surfaces of the pair of side plates are located below the lower surface of the motor board, when the spindle motor is thin, the motor board and the main chassis. When the spindle motor is a thick type, the motor is attached to the pair of side plates without a spacer between them and with a screw, and the pair of side plates is not provided with a step portion for increasing the height to the lower surface. A spacer is interposed between the board and the main chassis to attach it with screws, and the pair of side plates are attached to the bottom surface. Disk drive device which is characterized by using those having a stepped portion to increase the height.