JPH0194576A - Disk drive device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a disk drive device.

[Summary of the Invention] The present invention includes a chassis provided with a turntable, and a head (stylus) that lightly presses against the recording area of a disk placed on the turntable, which is supported via a movable arm member and an arm support member. and a slide base drive mechanism for sliding the slide base, and before inserting the disk, the movable arm member and the head are displaced in a direction away from the disk to facilitate insertion of the disk. At the same time, after inserting a disk and chucking the disk onto a turntable (spindle), the movable arm member is displaced toward the disk to lightly press the head against the disk surface. The arm support member is provided with a push rod that slides when pressed against the spring force of a return spring and whose tip abuts the movable arm member, and the movable arm stamp material is provided with a push rod that slides when pressed against the spring force of a return spring. By providing an inclined surface that is pressed by the tip of the movable arm member to separate the movable arm member from the disk, the movable arm member can be displaced in the direction away from the disk by a simple operation of pressing the push rod after the drive is completed. It has been made possible to do so.

[Prior Art] A disk drive device as shown in FIG. 8 is known.

This disk drive device 101 includes a turntable 1
02, and the turntable 10.
A head 106 lightly presses the upper and lower surfaces of the disk 105 in the disk cartridge 104 placed in the disk cartridge 2.
The slide base 1 supports the
10, and a slide base drive mechanism III that moves the slide base 110 in the radial direction of the disk 105.

When the M113 of the cartridge holder +12 is opened in order to insert the disk cartridge 104 into the cartridge holder 112 provided on the chassis 103, a pair of left and right cartridge supports provided on both sides of the cartridge holder 112 are linked to this. The portions 114 and 115 are lifted from the bottom surface 116 of the cartridge accommodating portion, and the pair of upper and lower movable arm members 107 and 1
08 move away from each other, and the distance between the heads 106 and 106 attached to the distal ends of these movable arm members 107 and 108 is increased, and these heads I
The disk cartridge 104 is easily inserted into the O6, 1061J.

Then, the left and right side parts of the disk cartridge 104 are respectively connected to a pair of left and right cartridge support parts 11 indicated by ii'i'J.
4.115 and inserts it into the cartridge holder 112, the shaft 11 of the disc cartridge 104 is inserted into the cartridge holder 112.
7 will be opened automatically. And when you close M113,
In conjunction with this, the pair of left and right cartridge support parts 1
14. ．． 115 descends and the disk cartridge 104
The inner disc 105 is chucked to the turntable 102, and the pair of left and right movable arm members 10
7. The heads 106 and 106 attached to the distal ends of the pair of upper and lower movable arm members 107 and 108 are moved toward the disk 105.
It is designed to be lightly pressed against both sides.

[Problems to be Solved by the Invention] In the conventional disk drive device 101, as described above, the pair of upper and lower movable arm members 107 and 108 are separated from each other in conjunction with the opening and closing of the arms 1 and 113. Since the movable arm members lα7 and 108 were configured to be displaced in the direction or in the direction toward each other, there was a problem that the structure for displacing the movable arm members lα7 and 108 in the direction away from each other or in the direction toward each other was complicated. .

The present invention has been made for the purpose of solving the above-mentioned conventional problems and providing a disk drive device that has a simple structure and can easily and reliably displace a movable arm member.

[Means for solving the problem] A chassis provided with a turntable and a head that is lightly pressed against the recording area of a disk placed on the turntable are supported via a movable arm member and an arm support member. The slide base includes a slide base and a slide base drive mechanism that slides the slide base, and before the disk is inserted, the movable arm member and the head are displaced in a direction away from the disk to facilitate insertion of the disk. In the disk drive device, the movable arm member is displaced toward the disk side after the disk is inserted (after the disk is chucked on the turntable), and the head is lightly pressed against the disk surface. A push rod is attached to the support member, and the tip of the push rod slides when pressed against the spring force of the return spring and comes into contact with the movable arm member. An inclined surface is provided which is pressed to move the movable arm member away from the disk.

[Operation] When the push rod is pressed and slid against the spring force of the return spring after the drive is completed, the tip of the push rod comes into contact with the inclined surface provided on the movable arm member and presses it. Therefore, the movable arm member is displaced in a direction away from the disk.

When the disk is finished chucking onto the turntable, the pressure on the push rod is released, and the push rod returns to its original position due to the force of the return spring, and the movable arm member also returns to its original position. , a head attached to the tip of the movable arm member contacts the disk surface.

[Example] Next, embodiments of the present invention will be described with reference to FIGS. 1 to 7.

In the figure, 1 is a disk drive device of the present invention,
The disk drive device 1 includes a chassis 3 provided with a turntable 2, and heads 6.6 that are lightly pressed onto the upper and lower recording areas of a disk 5 in a disk cartridge 4 chucked to the turntable 2, respectively. ,
A pair of upper and lower movable arm members 7.8 and an arm support member 9
A slide base 10 supported via the slide base 10, and a slide base drive mechanism 11 that moves the slide base lO.
It is equipped with

The chassis 3 includes a rectangular bottom plate I2 with a negative side cut out, and a left side erected on the circumference of the bottom plate 12.

It is formed into a box shape surrounded on all sides by a right side plate 13.14 and front and rear side plates 15.16, and the turntable 2 is mounted on the bottom plate 12, and the front side plate I
5 is provided with a cartridge insertion opening 15a for inserting the disc cartridge 4. Also, the bottom plate 12
A cartridge holder 17 that holds the disk cartridge 4 inserted through the cartridge insertion opening 15a is provided above the cartridge holder 17 so as to be movable up and down. The cartridge insertion opening 1 is provided on the top plate 18 of the cartridge holder 17.
Shutter 1 of disk cartridge 4 inserted from 5a
The shutter operation pin 20 that opens 9 is the pin support arm 2! At the same time, cartridge support pieces 22 and 22 for supporting both left and right sides of the disk cartridge 4 are provided on both the left and right sides of the top plate 18.

When the disk cartridge 4 is inserted from the cartridge insertion port 15a, the shutter operating pin 20 fits into the pin fitting hole 23 provided in the shutter 19 of the disk cartridge 4, and as the disk cartridge 4 is further inserted, , the force causes the pin support arm 2I to move around the pivot shaft 2.
4 as a fulcrum and rotates clockwise to push open the shutter 19. When the disk cartridge 4 is completely inserted into the cartridge holder 17, the cartridge holder 17 and the disk cartridge 4 housed therein are lowered, and the hub of the disk 5 housed inside the disk cartridge 4 is moved downward. It is designed to be chucked (magnetically attracted) to the turntable 2.

FIG. 3 shows an elevating mechanism for elevating and lowering the cartridge holder 17. As shown in FIG. A pair of left and right cartridge support pieces 2.2 provided on both the left and right sides of the cartridge holder 17 are provided with a total of four leg pieces 26, one pair each on the front and rear, each having a round rod-shaped roller 25 attached to the lower end. book leg piece 26
. . 2G are respectively placed on the leg support plates 27-H via the rollers 25. These four leg support plates 2
7...27 has an inclined surface 28 and a horizontal surface 29 connected to the upper end side of the inclined surface 28, and when the roller 25 comes to the horizontal surface 29 side, the cartridge holder I7 is in an elevated state. When the roller 25 is maintained and the roller 25 slides down the inclined surface 28, the cartridge holder 17 descends and the hub of the disc 5 housed in the disc cartridge 4 is chucked onto the turntable 2. . The four leg support plates 27...27 are provided on a slide plate 30 that is slidably attached to the bottom plate 12 of the chassis 3, and the slide plate 3o is moved in the front-rear direction (arrow a in FIG. 3). -b direction), the cartridge holder 17 is raised and lowered by the leg support plates 27...27.

A ball nut receiving member 3 is provided on one end side of the slide plate 30.
A ball nut 3.2 is attached through the ball nut 3.1, and a ball screw 35, which is supported at both ends by bearings 33.34, is screwed into the ball nut 32. The ball screw 35 is connected to a motor 37 via a reduction gear group 36.
It is designed to rotate forward and backward. Therefore, when the motor 37 rotates the ball screw 35 in one direction via the reduction gear group 36, the pole nut 32 rotates the leg support plates 27...2 via the nut receiving member 31 and the slide plate 30.
7 moves in the direction of arrow a and pushes up the leg piece 26 on the inclined surface 28, causing the cartridge holder 17 to rise. Conversely, if the ball screw 35 is rotated in the other direction, the cartridge holder 17 descends. .

Further, the pair of upper and lower movable arm members 7.8 are the fourth to sixth movable arm members 7.8.
As shown in the figure, a cantilever beam 38 made of a triangular plate spring with high elasticity has a head 6 attached to one end side, and the other end side of the cantilever beam 38 is sandwiched between a restraining plate 39 and a screw 40. A cantilever support member 41 is supported on the upper surface of one end side in the state, and a restraining plate 42 and a screw 4 are installed on the upper surface of the other end side of the cantilever support member 41.
3 and a metal pivot plate 44 which is attached with one end sandwiched therebetween.

The upper movable arm member 7 is mounted by overlapping the other end side of the pivot plate 44 on one side 45 of the arm support member 9, sandwiching it between a restraining plate 46 and a screw 47, and attaching it with the screw 4'7. By pressing the top surface of the cantilever support member 41 with the distal end of the leaf spring 48, the top surface 4 of the arm support member 9 is pressed.
It is installed so that it is approximately parallel to 5. Further, the lower movable arm member 8 is arranged such that the other end side of the pivot plate 44 is overlapped with the lower surface 49 of the arm support member 9, and the holding plate 50 and the screw 51
a leaf spring 52 which is sandwiched between the
By pressing the lower surface of the cantilever support member 41 with the tip thereof, the arm support member 9 is attached so as to be substantially parallel to the lower surface 49 of the arm support portion 9. The opposing surfaces of the cantilever support members 41 of the pair of upper and lower movable arm members 7 and 8 are formed with inclined surfaces 54 and 54 on which the tips of the four push rods 53, . . . , 53 described below come into contact. ing.

Said arm support member 9 is made in the shape of a cube and has an upper and lower surface 45, 49 as described above.

A lower pair of movable arm members 7.8 are mounted. This arm support member 9 is formed with a total of four rod insertion holes, two on the top and two on the top and bottom, penetrating from one side to the other end, and a push rod 53 is inserted into each rod insertion hole. There is. These push rods 53...53
The shaft portion 55 has a diameter slightly smaller than that of the rod insertion hole, and the shaft portion 5
The head portion 56 has a slightly larger diameter than the rod insertion hole provided at one end of the rod. These push rods 53...53 are inserted into the rod insertion hole with a return spring (coil spring) 57 attached to the outer periphery of the shaft portion 55, and are pushed against the spring force of the return spring 57. When the heads 56 of the upper two push rods 53, 53 are pressed, the tips of these push rods 53, 53 are connected to the rod guide 5 protruding from one side of the arm support member 9.
8 slides along the upper surface of the upper movable arm member 7, contacts the inclined surface 54 of the cantilever support member 41 of the upper movable arm member 7, rotates the movable arm member 7 upward by a predetermined angle, and then slides along the upper surface of the lower movable arm member 7. When the push rods 53, 53 are pressed, the tips of these rods 53, 53 slide along the lower surface of the rod guide 58, and the lower movable arm member 8 is rotated downward by a predetermined angle. It has become.

59 is the head 56 of the push rod 53...53.
. . 56, and the head pressing plate 59 is attached to a guide pin 60 protruding from one side of the arm support member 9.
4 by sliding along the guide bin 60.
Heads 56...5 of book push rods 53...53
6 is pressed evenly. Further, a stopper 61 is provided at the end of the guide pin 60, and the push rods 53...53 are moved by the return springs 57...57 until the head pressing plate 59 comes into contact with the stopper 61.
The push rod 53 slides due to the spring force.
... 53 and the inclined surface 54 are set so that a predetermined amount of clearance is generated.

62 is an upper cantilever operation plate that rotates the cantilever 38 of the upper movable arm member 7, and 63 is a lower cantilever operation plate that rotates the cantilever 38 of the lower movable arm member 8. One end of the upper cantilever operating plate 62 is fixed to the upper surface of the head pressing plate 59 with a screw 64,
The other end passes through the groove 65 etc. provided on the upper surface of the arm support member 9, and the bent portion 3 of the cantilever beam 38 of the upper movable arm member 7
It extends to 8a and is in contact with it. One end of the lower cantilever operating plate 63 is fixed to the lower surface of the head suppression plate 59 with a screw 66, and the other end passes through a groove 67 etc. provided on the lower surface of the arm support member 9, and the lower cantilever operation plate 63 is fixed to the lower surface of the head suppression plate 59 with a screw 66. It extends to the bent portion 38a on the lower surface of the cantilever beam 38 of the movable arm member 8 and abuts thereon.

In FIGS. 1 and 2, reference numeral 68 is a plate pressing device for pressing the head suppression plate 59, and the plate pressing device 68 converts the rotational movement of the motor 69 into a rotational-linear conversion mechanism such as a ball screw 70 or a pole nut 71. 72 (this mechanism is used in the slide base drive mechanism), the plate pressing body 73 is moved straight, and the head pressing plate 59 is slid by the plate pressing body 73.

Therefore, the plate pressing device 68 presses the head pressing plate 5.
If you press 9, the upper and lower cantilever operation plates 62
．． 63 slides, and the upper and lower pairs of movable arm members 7
, 8 are pressed to slightly displace the heads 6.6 at the tips thereof in a direction away from each other. Then, if the head pressing plate 59 is further pressed, the tips of the push rods 53...53 will be moved to the cantilever support member 41.
A pair of upper and lower movable arm members 7
．． 8 are largely displaced in the direction of separating them from each other.

It should be noted that pulley-shaped rollers 74 are attached to the left and right sides of the slide base 1O, respectively, so as to rotate in the horizontal direction. The slide base 10 is movably attached to the chassis 3 by fitting a pair of left and right rails 75 and 76 attached to the bottom plate 12 of the chassis 3 into the recesses provided in the rotating peripheral surfaces of the left and right rollers 74. and
The head 6 attached to the tips of the movable arm members 7 and 8 can be moved in the radial direction of the disk. Reference numerals 77 and 78 denote steel belt locking portions provided at the front and rear ends of one side of the slide base 8, and these steel belt locking portions 77 and 78 are connected to the slide base drive mechanism described below! 1 steel belt 80 can be attached.

The slide base drive mechanism 11 has a loop portion 81 in the center.
A steel belt 80 is formed, and one end and the other end are locked to the steel belt locking parts 77 and 78, and a loop part 81 of the steel belt 80 is wound around the circumferential surface of the steel belt 80. It consists of a pulley 8i that is fixed at the center and a stepping motor 83 that rotates the pulley 82.

Then, by rotating the stepping motor 83 in one direction, the heads 6.6 attached to the tips of the pair of upper and lower movable arm members 7.8 are moved forward toward the center of the disk while touching both sides of the disk. By rotating the stepping motor 83 in the other direction, the head 6.6 is turned back out of the recording area of the disk.

Since the disk drive device of the embodiment has the above-mentioned configuration, when the disk cartridge 4 is inserted through the cartridge insertion opening 1.5a, the shutter operation pin 20 provided on the top plate 18 of the cartridge holder 17 closes the disk cartridge 4. Shutter 19 is opened. When the disc cartridge 4 is completely inserted into the cartridge holder I, the motor 37 of the cartridge holder lifting mechanism is turned on, the cartridge holder 17 and the disc cartridge 4 are lowered, and the disc 5 in the disc cartridge 4 is Chucked into turntable 2. Under this condition, slide base drive mechanism II
to move the slide base 10 toward the turntable 2. Then, when the head 6 comes close to the recording area of the disk, if the pressure on the head pressing plate 59 by the plate suppressing device 68 is released, the push rod 5
3...53 are pushed back by the spring force of the return springs 57...57, and the pair of upper and lower movable arm members 7, 8 as a whole and the cantilever beams 38, 38 are rotated in a direction in which they approach each other. A head 6.6 attached to the tip of the burr 38.38 lightly contacts both sides of the disk 5 to perform recording and reproduction.

When recording and playback are finished, first push the head press plate 59 a little with the plate press device 68, and the upper and lower pair of movable arm members 7 are activated by the cantilever operation plates 62 and 63.
, 8 are pressed, and these cantilevers 38.38 are slightly displaced in the direction away from each other, and the head 6.6 is separated from both sides of the disk.
Under this condition, the slide base 10 is turned back by the slide base drive mechanism 11. and head 6
．． 6 comes to a position near the recording area on the outer circumference side of the disk, if the head pressing plate 59 is further pressed by the plate suppressing device 68, the tips of the push rods 53...53 will tilt the cantilever support member 41. By contacting the surface 54, the pair of upper and lower movable arm members 7.8 are rotated in a direction away from each other.

Note that the return spring 57 is omitted and the cantilever support member 41 is
It is also possible to use the spring force of the leaf springs 48, 52 to return the push rods 53...53.

Further, the plate pressing device 68 is not limited to the one in the embodiment, but the point is that it has a simple structure and can quickly and accurately press the push rod 53.
. . . Any material that can slide 53 is sufficient.

[Effects of the Invention] As explained above, according to the present invention, the push rod is attached to the arm support member, the movable arm member is provided with an inclined surface, and the push rod is pressed against the inclined surface, making the structure simple and movable by operation. This has the effect that the arm member can be displaced in a direction away from the disk.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a disk drive device according to a first embodiment of the present invention, Fig. 2 is an enlarged view of the main parts, and Fig. 3 is a -
■ Line sectional view, Figure 4 is a sectional view of the main part before pushing the push rod, Figure 5 is a plan view of the same, Figure 6 is a sectional view of the main part with the push rod pressed, Figure 7 is the 6th
A sectional view taken along the line ■--■ in the figure, and FIG. 8 is a partially cutaway perspective view of the conventional example. l...Disk drive device, 2...Turntable, 3...Chassis, 4...Disk cartridge,
5... Disk, 6... Head, 7.8... Movable arm member, 9... Arm support member, IO... Slide base, 11... Slide base drive mechanism, 53
... Push rod, 54 ... Inclined surface, 57 ...
Return spring.

Claims (1)

[Scope of Claims] A chassis provided with a turntable, a slide base supporting a head that is lightly pressed onto a recording area of a disk placed on the turntable via a movable arm member and an arm support member; a slide base drive mechanism that slides the slide base, and the arm support member includes a push rod that slides when pressed against the spring force of a return spring and whose tip abuts the movable arm member. In the disk drive device, the movable arm member is provided with an inclined surface that is pressed by the tip of the push rod and displaces the movable arm member in a direction away from the disk.