JPH0630957U - Disk device - Google Patents

Abstract

(57) [Abstract] [Purpose] A head can be stably moved to an unloading position with a simple configuration, and at the unloading position, the distance between two heads is set to a position in the radial direction of the disk. (EN) Provided is a disk device which can be made constant regardless of the thickness and can be thinned. [Structure] First capable of recording or reproducing information on a disc
And a moving means for moving the second head 17B between the second position and the second position which is impossible.
Has a support portion 61 that supports the head arm 57 in the moving direction of the head carriage 54 when the head 17B is positioned at the second position, and a support portion holding member having an elastic portion 90a in a part of the support portion 61. It is configured with 90.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a disc device that records or reproduces information on a disc, and more particularly, to a structure of a head loading / unloading mechanism in the disc device.

[0002]

[Prior art]

 The disk device is a device that records or reproduces information on or from a disk-shaped recording medium such as a magnetic disk or a laser disk. A disk as the recording medium is mounted so that it can be inserted and ejected, and a motor is driven. Thus, the disk is rotated, and recording or reproduction is performed while moving the head in contact with or close to the disk. In this case, the head is mounted on a carriage and moved (seek) along the radial direction of the disk by a motor.

In the above-mentioned disc device, an insertion / ejection means for mounting and ejecting a disc cassette, a disc rotation driving means for rotating a disc by a motor, and a head for a disc along a radial direction on a base supporting each component. Head seek means for moving to a desired track position, head load means for loading and unloading the head with respect to the disk, and the like are provided. Further, a control circuit for controlling the entire disk device, a connector for power supply connection, etc. are provided, and the control circuit is connected to a host device or the like via an interface.

Such a disk device is used as an external storage device of an electronic device such as a personal computer or a word processor and may be configured as an independent device. However, in general, it is often incorporated in the main body of the electronic device. . Further, as electronic devices have become smaller and more portable, there has been a strong demand for the disk device to be smaller, lighter and thinner.

Many of such disc devices employ a structure in which the loading and unloading operations of the head with respect to the disc are interlocked with the cassette guide. In this case, the cassette guide moves while being guided by the guide groove formed in the side wall of the base.

[0006]

[Problems to be solved by the device]

 However, in such a disc device, the shape of the cassette guide plays an important role in order for the cassette guide to move smoothly along the side wall of the base. There is a problem that is not fully loaded.

Further, the unloading position depends on the accuracy of each component and the assembling accuracy, and depending on the accuracy, the position of the head becomes a position lower than a predetermined position, and when the recording medium is inserted, There was a problem that it would come into contact with the head.

The present invention has been made in view of the above technical problems, and an object of the present invention is to enable a head to be stably moved to an unload position with a simple structure. It is an object of the present invention to provide a disc device which can make the gap between two heads constant at the unload position regardless of the position of the heads in the radial direction of the disk and can make the device thinner.

[0009]

[Means for Solving the Problems]

 In order to solve the above problems and to achieve the above objects, the present invention is a disk device for recording or reproducing information on the recording medium by rotating the disk recording medium and moving the head in a predetermined direction. And a head carriage that holds the first head and is movable in the radial direction of the recording medium, and a second carriage that is supported by the head carriage and that faces the first head. The head carriage includes a head arm, a first position at which information can be recorded or reproduced on the recording medium, and a moving means for moving the second head to an incapable second position. The longitudinal direction of the head carriage and the moving direction of the head carriage are arranged to be substantially perpendicular to each other, and the moving means includes the second head. When it is located at the position 2, it has a supporting portion for supporting the head arm in the moving direction of the head carriage, and is provided with a supporting portion holding member having an elastic portion at a part of the supporting portion. .

Another invention is a disk device that records or reproduces information on the recording medium by rotating the disk-shaped recording medium and moving the head in a predetermined direction. A head carriage that holds the head and is movable in the radial direction of the recording medium; a head arm that is supported by the head carriage and that holds a second head facing the first head; Is provided with a first position where information can be recorded or reproduced and a second position where the information cannot be reproduced, and a moving means for moving the second head. The moving means is arranged so as to be substantially perpendicular to the moving direction of the head carriage, and the moving means moves the head arm to the head arm when the second head is located at the second position. The drive unit includes a support unit that supports the drive carriage in the moving direction. The support unit includes a plurality of shaft portions having different diameters, and the plurality of shaft portions are eccentrically connected to each other in the axial direction.

[0011]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. In each of the following drawings, the same reference numerals denote the same parts or corresponding parts. 1 to 4 are views showing an embodiment of a disk device to which the present invention is applied, FIG. 1 is a plan view showing an internal configuration at the time of unloading with a cover omitted, and FIG. 2 is a plan view showing the internal structure of FIG. 3, FIG. 3 is a front view seen from the line 3-3 in FIG. 2, and FIG. 4 is a rear view seen from the line 4-4 in FIG. 5a and 5b are enlarged views of a main part.

As shown in FIGS. 1 and 2, each component is housed in a box-shaped base 10 having an open top. The base 10 is formed of a thin metal structure such as aluminum, and its upper surface is a cover (not shown) formed of a non-magnetic thin plate material such as aluminum for magnetic shielding and dust prevention. Is covered. As shown in FIG. 3, a front panel 13 having a cassette insertion opening 12 for inserting and ejecting the disc cassette 11 is attached to the front surface of the base 10. Further, a push button (eject button) 14 that is operated when ejecting the loaded disk cassette 11 is provided at the left end of the front panel 13.

In FIGS. 1 and 2, a cassette guide 15 for guiding the insertion, ejection, loading and unloading of the disc cassette 11 is held in the base 10 so as to be movable up and down and back and forth. . The cassette guide 15 has a cross-sectional shape that guides and holds the disc cassette 11 that is inserted from the front side. Further, in the example shown in the figure, the rear portion (back portion) is cut away so that the left half of the cassette guide 15 is notched. It has a planar shape provided. Further, the cassette guide 15 is mounted in a position which is shifted to the right side with respect to the base 10 (rightward shift position), and a space for arranging other components is formed on the left side of the base 10. Has been done.

1 and 2, a head having a head 17 for recording or reproducing information on a disk (information medium) in the disk cassette 11 is provided in a region of the notch 16 of the cassette guide 15. A seek mechanism 18 is provided. The head seek mechanism 18 is a mechanism for moving (seeking) the head 17 to an arbitrary track position along the radial direction of the disk.

A disk (magnetic disk or the like) as an information medium (medium) housed in the disk cassette 11 is opened by opening a slidable shutter 19 provided in the disk cassette to open a head receiving opening. It can be accessed from the outside, such as by loading the head 17 from above.

In FIGS. 1 and 2, a vertical shaft 20 provided at the right rear portion of the cassette guide 15 has a shutter lever 21 and a latch lever 22 which are swingable about the shaft on the upper side of the cassette guide 15. Is pivotally supported. The shutter lever 21 is for opening and closing the shutter 19 of the head receiving opening of the disc cassette 11 in synchronism with the insertion of the disc cassette 11. A pin 23 is provided which is in contact with the front end of the shutter 19 and can be in contact with the edge of the shutter 19. Further, the shutter lever 21 is biased in the counterclockwise (counterclockwise) direction in the figure by a spring 25 stretched between the shutter lever 21 and the cassette guide 15. Further, on the upper surface of the cassette guide 15, a groove 26 having a predetermined length is formed so that the pin 23 can be moved along the movement trajectory of the pin 23.

1 and 2, the latch lever 22 is urged by a latch spring 27 in the counterclockwise (counterclockwise) direction in the figure, and in the unload state, as shown in FIG. The roller 29 provided at one end of the latch lever 22 is locked to the stopper 28 formed on the base 10 to be in the latched state. At the other end of the latch lever 22, there is provided a pin 30 with which the tip of the inserted disc cassette 11 can come into contact. Thus, the side opposite to the cutout portion 16 of the cassette guide 15, that is, the side on which the head seek mechanism 18 and the cassette loading mechanism 33, which will be described later, are arranged (the space is reduced by bringing the cassette guide 15 and the disc cassette 11 closer to each other). The latch mechanism 22 is disposed on the side opposite to the side on which the latch mechanism 22 is formed.

FIGS. 6A and 6B are views showing a mounting component on the bottom surface of the base 10 with the cassette loading mechanism, the head seek mechanism and the like removed, FIG. 6A being a plan view and FIG. The front view seen from the line BB in the inside, and (c) is the side view seen from the line C-C in (a). In FIG. 6, a disk-shaped flat motor 31 for driving a disk is mounted on the bottom surface of the base 10 at a substantially central portion thereof, and the motor 31 has a central hole (not shown) of the disk cassette 11. ), A drive shaft 82 that engages with a drive hole (not shown) provided in the vicinity of the center hole of the disk cassette 11, and a magnet 83 for attracting and holding the hub of the disk. It is provided. A positioning pin 84 for positioning the disk cassette 11 in the loading state is provided behind the motor 31, and a part of the base 10 is cut and raised in the vicinity of the cassette insertion opening 12 (FIG. 3). A positioning surface 85 is provided. A circuit board 32 for controlling the disk device is joined around the motor 31.

In FIGS. 1 and 2, a cassette loading mechanism 33 for moving the cassette guide 15 to a loading position and an unloading position is arranged in a space formed on the left side of the cassette guide 15 in the base 10. It is set up. Further, the base 10 is provided with an operating lever 34 that extends across the upper side of the cassette guide 15 and that is pivotally supported by the base 10 at both ends so as to be swingable. The button lever 36 of the loading mechanism 33 is constantly urged toward the insertion port 12 by the return spring 35, and can be moved rearward against the return spring 35 by pushing the eject button 14. The operating lever 34 has its swinging position regulated by the button lever 36, and drives the cassette guide 15 to the load position and the unloading position by the swinging position.

7 to 10 are partial side views showing the states of the cassette loading mechanism 33 during unloading and loading. FIG. 7 shows the state of the button lever 36 during unloading, and FIG. 9 shows a state of the operating lever 34 and the cassette guide 15 at the time of unloading, FIG. 9 shows a state of the button lever 36 at the time of loading, and FIG. 10 shows a state of the operating lever 34 and the cassette guide 15 at the time of loading. The button lever 36 is slidably supported on the base 10 by a sliding guide portion composed of a pin and an elongated hole, and is always attached to the left side (front side) in the drawing by a return spring 35. It is energized. The actuating lever 34 is pivotally supported at its both ends by a fulcrum 37 provided on the base 10 so as to be swingable. Therefore, a notch 38 formed in the button lever 36 and a pin 39 provided on one side of the operating lever 34 are engaged with each other.

Further, cam grooves 40 are formed on both sides of the operating lever 34, and step-like holding portions 41 are provided on both sides of the base 10. On the other hand, on both sides of the cassette guide 15, a center pin 42 slidably engaged with the cam groove 40 of the operating lever 34 and a roller portion 43 abutting on the holding portion 41 of the base 10 are provided. Since the cassette guide 15 has a left half cutout shape as shown in FIGS. 1 and 2, the holding portion 41 and the roller portion 43 have a total of one location on the left side and two locations on the right and front sides. It is provided in three places.

Next, the operation of each part when loading and unloading the disc cassette 11 will be described with reference to FIGS. When the disc cassette 11 is inserted through the cassette insertion opening 12 (FIG. 3), first, the front end of the disc cassette 11 comes into contact with the pin 23 of the shutter lever 21 (FIGS. 1 and 2), and the shutter lever 21 in FIG. Rotate clockwise (clockwise). At this time, the pin 23 (FIGS. 1 and 2) of the shutter lever 21 comes into contact with the edge of the shutter 19 of the disc cassette 11, and the shutter 19 is opened according to the rotation of the shutter lever 21 (insertion of the disc cassette 11). By moving it against a return spring (not shown), the head receiving opening is opened, and the head 17 can access the disk (medium).

Next, the tip of the disc cassette 11 comes into contact with the pin 30 of the latch lever 22 (FIGS. 1 and 2), and the disc cassette 11 is further pushed (in the inserting direction), so that the latch lever 22 moves to the timepiece shown in the figure. By rotating in the (clockwise) direction, the core 29 of the latch lever 22 is disengaged from the stopper 28 of the base 10. By releasing the latch, the cassette guide 15 which has been restrained by the roller 29 can be moved to the rear of the apparatus (to the right in FIG. 8). The position of the disc cassette 11 in the forward direction in the cassette guide 15 is regulated by the pin 23 with which the tip of the disc cassette 11 abuts against the rear end of the groove 26 (FIG. 2).

When the disc cassette 11 is pushed further, the cassette guide 15 also moves to the rear side of the device. Therefore, the center pin 42 (FIGS. 8 and 10) of the cassette guide 15 horizontally moves in the cam groove 40 of the operating lever 34 in the right direction (rear side of the device) in the drawing, and the urging force of the return spring 35 is increased. The actuating lever 34 is rotated by acting on the pin 39 of the actuating lever 34 via the button lever 36, and the actuating lever 34 rotates in the clockwise (clockwise) direction from the position of FIG. Rotate. At the same time, the roller portions 43 (three places) of the cassette guide 15 also move to the rear side of the apparatus along the horizontal portion 41b of the holding portion 41. Since the pin 39 is moved to the left side in the figure by the rotation of the actuating lever 34, the button lever 36 is also moved together.

When the disc cassette 11 is further pushed, the roller portion 43 of the cassette guide 15 descends so as to move along the lower vertical portion 41c of the stepped holding portion 41, and the cassette guide 15 is moved to the position shown in FIG. The cassette loading state (the state in which the disc cassette 11 is at the loading position) is set as shown.

In the loading state in which the cassette guide 15 is lowered downward, the cassette guide 15 is brought into contact with the lower holding surface (vertical surface) 41 c of the holding portion 41 of the base 10 and the cassette guide 15. The front and rear positions of 15 are restricted. Further, in this loading state, the disc cassette 11 is positioned in a mounted state by the positioning pins 84 and the positioning surface 85, and the cassette guide 15 is urged downward by the downward urging force of the operating lever 34. Energized. Therefore, the load position of the cassette guide 15 is determined by pressing and positioning the upper surface of the disk cassette 11 by the plurality of disk cassette pressing projections 86 (FIGS. 1 and 2) provided on the cassette guide 15. Regulated. When the cassette guide 15 is at the loading position, the disc (specifically, the hub portion) in the disc cassette 11 is magnetically attracted onto the rotor of the disc driving motor 31 (FIG. 6) and the rotor is By engaging with the upper center shaft 81 and the drive pin 82, the disk (media) is positioned (height direction, rotation direction). That is, it is set to a loading state in which information can be recorded and reproduced on the disc.

In this loading state, the center pin 42 of the cassette guide 15 is urged obliquely downward to the left in FIG. 10 by the top end side 40a of the upper surface of the cam groove 40 of the operation lever 34. The front and rear positions of the roller portion 43 are restricted by the lower vertical portion 41c of the holding portion 41 of the base 10, and the cassette guide 15 holds the disc cassette 11 with respect to the base 10 in a stable state.

When ejecting the disc cassette 11 set in the disc device, the eject button 14 (FIGS. 3 and 9) is pressed to move the button lever 36 rearward against the return spring 35. When the button lever 36 moves rearward, first, the notch 38 of the button lever and the pin 39 of the actuating lever 34 are engaged with each other so that the actuating lever 34 moves counterclockwise from the position of FIG. Rotate to the left). Next, the center pin 42 is lifted by the cam groove 40, and the cassette guide 15 moves upward. When the eject button 14 is further pressed, the roller guide 43 is lifted up to disengage the roller portion 43 from the lower holding portion (vertical portion) 41c, so that the cassette guide 15 can be moved to the front of the apparatus (leftward in FIG. 10). Become.

When the eject button 14 is further pressed, the shutter lever 21 and the latch lever 22 are vigorously rotated counterclockwise (counterclockwise) by the urging forces of the return springs 25 and 27 (FIGS. 1 and 2). , The disc cassette 11 is ejected forward, and the cassette guide 15 is moved forward. At this time, an elastic member for urging the cassette guide 15 forward may be provided in order to help the smooth movement of the cassette guide 15. In this embodiment, a spring member 87 (FIGS. 1 and 2) is attached between the operating lever 34 and the cassette guide 15. Further, the shutter spring 25 (FIGS. 1 and 2) may be used. In that case, one end of the shutter spring 25 is attached to the fixed side of the base 10 or the like or the operating lever 34. When the shutter lever 21 moves back in the groove 26 and returns, the pin 23 of the shutter lever 21 comes into contact with the front end of the groove 26, and a returning force is applied to the cassette guide 15. Thus, first, the cassette guide 15 is returned to the initial position of FIG. Then, when the pressing of the eject button 14 is stopped, the button lever 36 and the operating lever 34 are returned to the initial position (unload position) shown in FIGS. 7 and 8 by the biasing force of the return spring 35 (FIGS. 7 and 9). Be done.

As shown in FIGS. 1 and 2, a head seek mechanism 18 is arranged in the area of the cutout portion 16 of the cassette guide 15. FIG. 12 is a longitudinal sectional view of the head seek mechanism 18 portion taken along the line 10-10 in FIG. Next, the head seek mechanism will be described with reference to these drawings. In the illustrated example, the notch 16 is provided on the left side of the latter half of the cassette guide 15 and extends over about a quarter of the area. However, in some cases, the notch corresponding to this is provided in the latter half. It may be provided on the right side, and in that case, a mechanism corresponding to the head seek mechanism 18 is also provided on the right cutout region.

1 and 2, the side where the cassette loading mechanism 33 including the button lever 36 and the like is disposed, that is, the space formed by moving the cassette guide 15 to one side (the right side in the illustrated example). The cassette loading mechanism 33 and the head seek mechanism 18 are arranged near the side edge (in the illustrated example) along the side edge of the disc cassette 11 in the insertion direction of the disc cassette 11. Has been done.

The head seek mechanism 18 includes a head driving motor 51 fixed to the rear wall of the base 10, a drive shaft 53 formed of a lead screw rotated by a motor 51 via a gear train 52, A head carriage 54 that engages with the lead groove of the drive shaft (lead screw) 53 and can reciprocate by the forward and reverse rotation of the drive shaft 53, and a guide bar for fitting the head carriage 54 and guiding the head carriage 54. 55, a lower head 17B attached to the tip of the head carriage 54, a head arm 57 attached to the head carriage 54 via a leaf spring 56 so as to be vertically movable, and a head arm 57 of the head arm 57. The upper head 17A attached to the tip and the head arm 57 are urged downward (toward the head load position). And a spring 58 for head load.

The output of the motor 51 may be transmitted to the drive shaft 53 by a belt or the like. At that time, as shown in FIG. 13, a spring 101 is interposed between the motor 100 and the pulley 100 fixed to the output shaft 51a to eliminate axial play between the motor 51 and the output shaft 51a. To configure. By adopting such a configuration, it is possible to prevent vibration due to axial play and step driving of the step motor 51 and noise due to this vibration. Further, since the position of the pulley 101 is stabilized by the pressing force of the spring 101, the position of the pulley 100 does not change back and forth in the axial direction due to the axial play and the forward and reverse rotation of the step motor 51. Therefore, the engagement state of the belt with the pulley 100 is stable, and the belt is prevented from coming off the pulley 100. The same applies when the belt transmission mechanism is replaced with a gear transmission mechanism.

Further, on the notch 16 side of the cassette guide 15, there is a bar 61 extending through the lower side of the head arm 57. As shown in FIGS. 11 (a) and 11 (b), the bar 61 is It is composed of a shaft portion 61a having a groove 61c for engaging a tool such as a screwdriver at the end portion, and a shaft portion 61b eccentric to the shaft portion 61a by a predetermined amount. A holder 90 is attached to the end of the shaft 61a, and a bar 61 for head lift (unloading of the head) is attached so that the end of the shaft 61b is fixed to the cassette guide 15. . Then, as shown in FIGS. 11A and 11B, a tool such as a screwdriver is engaged with the groove 61c to rotate the bar 61, and the position of the head arm 57 in the height direction is adjusted. The bar 61 is constructed so that the bottom portion 90b of the holder 90 engages with the base 10 when the head is unloaded, as shown by the solid line in FIGS. 5 (a) and 5 (b). An elastic portion 90a is formed on the side surface of the holder 90 so that the holder 90 can be easily engaged with the base 10 when the head is unloaded.

With the above-described structure, when the cassette guide 15 is moved upward and is unloaded, the head arm 57 is lifted to the raised position as shown in FIG. 12, and the upper head 17A is held at the unload position. At this time, in order to reduce the thickness of the device while considering the force against the biasing force of the spring 58, the bar 61 supports the head arm 57 at a substantially central portion between its fixing point and the holding point of the head 17A. It is made to do.

Further, the movement of the holder 90 when the head shifts to the unload state will be described in detail. The movement of the holder 90 when shifting the head to the unload state will be described in detail. As the guide 15 moves upward, the bar 61 also moves upward in FIG. 5 (a) and toward the base 10 side. Immediately before shifting to the state of FIG. 5B, the holder 90 comes into contact with the side wall of the base 10 and hinders the movement of the holder 90. However, due to the moving force of the bar 61, the elasticity of the holder 90 is reduced. Since the portion 90a is bent and forms an inclined surface, smooth movement can be achieved. Further, as shown in FIG. 11 (b), since the bar 61 has an eccentric shaft portion 61b, the disc cassette 11 is inserted when the head 17a is unloaded and the groove portion of the bar 61 is inserted. When the driver is inserted into 61c and rotated, the eccentric shaft portion 61b is fitted with the cassette guide 15, so that the head arm 57 can be moved up and down by the amount of the eccentricity. That is, the position of the head 17a can be adjusted.

As described above, the disk device of this embodiment is configured so that the upper head 17A and the lower head 17B can be simultaneously loaded on the upper surface and the lower surface of the medium (disk) in the disk cassette 11. It is configured. FIG. 12 shows a state in which the cassette guide 15 and the heads 17A and 17B are in the unloading position. In this state, the upper surface of the cassette guide 15 (the highest part) and the upper surface of the head arm 57 (the highest part). ) Have substantially the same height, that is, substantially the same plane. Further, in the present embodiment, as shown in FIG. 12, the distance between the upper surface of the cassette guide 15 or the upper surface of the head arm 57 and the cover 63 (FIG. 12) covering the open upper surface of the base 10 in this unload state is as small as possible. By setting it small, the height (thickness) of the disk device is made as small as possible.

According to the embodiment described above, by rotating the disk as the recording medium and moving the heads 17A and 17B in a predetermined direction on the disk, information recording or recording on the disk is performed. A disk device for reproducing has head loading / unloading means composed of a bar 61 held by a cassette guide 15 and a holder 90 attached to the other end of the bar 61, and has the holder. Since 90 is configured to securely engage with the base 10 during unloading, the distance between the lower head and the upper head during unloading can be kept constant regardless of the position of the head in the disk radial direction. The device was made thinner. Also, the reliability has been improved.

[0039]

[Effect of device]

 As is apparent from the above description, according to the present invention, the support portion that supports the head arm in the moving direction of the head carriage is configured to include a plurality of shaft portions having different diameters, and further, the plurality of shaft portions are eccentric. Since they are connected to each other in the axial direction, the head can be reliably moved from the recordable or reproducible position to the impossible position with a compact structure.

Further, since the mechanism for finely adjusting the position of the head attached to the head arm at the position where recording / reproduction is impossible is provided, it is possible to provide a disk device that can be thinned and highly reliable. You can

[Brief description of drawings]

FIG. 1 is a plan view showing an unloaded state of an embodiment of a disk device to which the present invention is applied, with a cover removed.

FIG. 2 is a plan view showing a state when the disk device of FIG. 1 is loaded, with a cover removed.

FIG. 3 is a front view taken along line 3-3 in FIG.

FIG. 4 is a rear view taken along line 4-4 in FIG.

FIG. 5 is an enlarged view of a main part of the present embodiment, in which (a) shows a state in which a bar for unloading a head arm is moving, and (b) shows a bottom portion of a bar holder engaged with a base. It shows the state.

6A and 6B are views showing the configuration on the bottom surface of the base of the disk device of FIG. 1, in which FIG. 6A is a plan view, FIG. 6B is a front view seen from the line BB in FIG. ) Is a side view seen from the line C-C in (a).

FIG. 7 is a partial side view showing a state when the button lever in FIG. 1 is unloaded.

FIG. 8 is a partial side view showing a state when the operation lever and the cassette guide in FIG. 1 are unloaded.

9 is a partial side view showing a state when the button lever in FIG. 2 is loaded.

FIG. 10 is a partial side view showing a state when the operating lever and the cassette guide in FIG. 2 are loaded.

FIG. 11 is an enlarged explanatory view of a main part of the present embodiment, in which (a) shows an outline of a mechanism and (b) shows a head arm height adjusting method.

12 is a longitudinal sectional view of a portion of the head seek mechanism taken along the line 10-10 in FIG.

FIG. 13 is an enlarged explanatory diagram of a main part of the present embodiment.

[Explanation of symbols]

 10 base 11 disk cassette 15 cassette guide 17A upper head 17B lower head 18 head seek mechanism 31 disk drive motor 33 cassette loading mechanism 51 head drive motor 53 drive shaft (lead screw) 54 head carriage 55 Guide bar 57 Head arm 58 Spring (for biasing head arm) 61 Bar (for lifting head arm) 61a Shaft part 61b Shaft part 61c Groove 90 Holder 90a Elastic part 90b Bottom part

Claims (2)

[Scope of utility model registration request] 1. A disk device for recording or reproducing information on the recording medium by rotating the disk-shaped recording medium and moving the head in a predetermined direction, wherein the first head is held and the recording is performed. A head carriage that is movable in the radial direction of the medium, a head arm that is supported by the head carriage and that holds a second head facing the first head, and information is recorded on or reproduced from the recording medium. A moving means for moving the second head is provided at a possible first position and an impossible second position. The head carriage has a longitudinal direction of the head carriage and a head carriage of the head carriage. The moving means is provided so as to be substantially perpendicular to the moving direction, and the moving means moves the head arm forward when the second head is positioned at the second position. A support portion for supporting over the moving direction of the head carriage, the disk apparatus characterized by comprising a support holding member having an elastic portion in a part of the support portion. 2. A disk device for recording or reproducing information on the recording medium by rotating the disk-shaped recording medium and moving the head in a predetermined direction, wherein the first head is held and the recording is performed. A head carriage that is movable in the radial direction of the medium, a head arm that is supported by the head carriage and that holds a second head facing the first head, and information is recorded on or reproduced from the recording medium. A moving means for moving the second head is provided at a possible first position and an impossible second position, and the longitudinal direction of the head carriage and the moving direction of the head carriage are: The moving means is configured to move the head arm to move the head carriage when the second head is located at the second position. A support portion that supports over, the supporting portion has a plurality of shaft portions having different diameters, the disk device, characterized in that the plurality of shaft portions which are axially connected to be eccentric.