JP2656351B2 - Carriage mechanism of data recording / reproducing device - Google Patents

Description

The present invention relates to a carriage mechanism for a data recording / reproducing device such as a hard disk device.

(Prior Art) Conventionally, for example, in a small hard disk drive (HDD), a rotary type carriage mechanism is used, and a head mounted on the carriage mechanism seeks in a radial direction of a recording medium. Here, for the HDD, there is a method of unloading the head from the recording medium when starting and stopping the rotation drive of the recording medium. This method prevents head crashes at start and stop, reduces the starting torque of the spindle motor that rotates the recording medium,
It is possible to prevent the head from adhering to the recording medium and to prevent the head and the recording medium from being damaged by external vibration and impact.

In this type of carriage mechanism, for example, as shown in FIG. 16, a ramp member 10 is provided, and the head 11 is supported by the ramp member 10 during unloading. The head 11 is supported by a head arm (load beam) 12, and moves toward the recording medium 13 by the rotation of the head arm 12 during loading. At this time, the head 11 descends toward the recording medium 13 so as to slide on the slope 10a of the ramp member 10. The head 11 performs read / write on the recording medium in a floating state. However,
In the above-described method, the head 11 needs to ride on the ramp member 10 at the time of unloading.
A considerable driving force is required for the carriage for moving the carriage. Also, while moving on the ramp member 10, the head
11 may be tilted and collide with the recording medium 13 to cause damage.

Further, as another method, there is a mechanism including an unload bar 14, a cam 15, and a spring 16, as shown in FIG. In this method, when unloading or loading, the cam
15 is rotated by, for example, a motor to move the unload bar 14 up and down. The unload bar 14 rotates around a rotation shaft 17 according to the rotation state of the cam 15. Spring 16
Moves the unload bar 14 downward (when the recording medium 13
Side) is always biased. At the time of unloading, as shown in FIG. 17, the rotation of the cam 15 causes the unload bar 14 to rotate upward (directions of arrows X and Y). Unload bar 1
4 contacts the head arm 12 and moves the head 11 to the recording medium 13
Will be unloaded away from the

With such a method, the disadvantage of the method using the ramp member 10 can be solved, but a drive source for rotating the cam 15 is required. Further, it is necessary to move the unload bar 14 up and down in synchronization with the operation of the carriage. However, if this operation sequence is defective, the head 11 will be damaged.

(Problems to be Solved by the Invention) As a carriage mechanism having an unload function, there are a method using a ramp member 10 and a method using an unload bar 14. However, in the former method, it is necessary to increase the driving force of the carriage, and in the latter method, a driving source for the unload function is required.

An object of the present invention is to provide a carriage mechanism of a data recording / reproducing apparatus capable of reliably performing head loading and unloading operations without requiring a particularly large carriage driving force or a special driving source for an unloading function. To provide.

The present invention is directed to a carriage mechanism of a data recording / reproducing apparatus for moving a head in a radial direction of a recording medium, the head being supported at one end, and the head being supported at the other end. A curved long hole is formed, and a head arm member for rotating the head in the radial direction of the recording medium about an axis, and slidably attached to the long hole of the head arm portion at a predetermined interval. A retracting member that lowers a portion of the head arm member that supports the head when the head is loaded, and raises a portion that supports the head of the head arm member when the head is unloaded. When the head is unloaded, the head arm member is moved in a direction in which the head separates from the surface of the recording medium when the head is unloaded. Sometimes the head is a carriage mechanism including a retraction mechanism for moving the head arm member in a direction to approach the surface of the recording medium.

With such a configuration, the loading and unloading operations of the head can be realized without requiring a particularly large carriage driving force or a special driving source for the unloading function.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. First
FIG. 2 is a plan view showing a configuration of a carriage mechanism used for the HDD according to the first embodiment. As shown in FIG.
In the mechanism of the embodiment, a retract mechanism 20 for performing the loading and unloading operations of the head 11 is provided.
The retract mechanism 20 has a retract bar 21 for supporting the head arm 12 and a bearing 22.

The head arm 12 is connected to a carriage 23, and is configured to move in the radial direction (arrow A) of the recording medium by the rotational driving force of the carriage 23. The carriage 23 is driven by a voice coil motor 24 to
Is driven to rotate around.

As shown in FIG. 2, the retract bar 21 has one end 21a engaged with a side portion of the carriage 23, and is configured to be movable in the front-rear direction (arrow B) by rotating the carriage 23. . Further, the retract bar 21 is vertically rotated by the mechanism of the bearing unit 22 according to the torque generated by the driving force transmitted from the carriage 23.

Specifically, as shown in FIGS. 5 and 10, a guide groove 26 is formed on a side portion of the carriage 23. One end 21a of the retract bar 21 is guided by the guide groove 26 and moves in the front-back and up-down directions in accordance with the rotational driving of the carriage 23. The guide groove 2 is, as shown in FIG.
26a and a lower unloading section 26b. Upper horizontal section
26a is a groove for stopping the vertical movement of the retract bar 21 even when the carriage 23 is driven to rotate (seek) when the head 11 is loaded (see FIG. 7). On the other hand, the lower unloading section 26b is a groove for temporarily fixing the other end 21b of the retract bar 21 when the head 11 is unloaded, while the other end 21b is raised.

On the other hand, as shown in FIGS. 5 and 10, the bearing portion 22 is provided with a joint portion 27 that supports the retractable bar 21 so as to be movable in the front-rear direction. Joint part
Reference numeral 27 denotes a rotatable (arrow C) using the bearing 22 as a fixed support, and the other end 21 b of the retractable bar 21.
This is a mechanism for moving up and down.

Here, in the HDD, as shown in FIG. 3, a carriage mechanism in which a plurality of heads 11 are provided for a plurality of recording media 13 in an axial direction is used.

 Next, the operation of the embodiment will be described.

First, in the loaded state of the head 11, the carriage 23 moves so that the head 11 is positioned on the recording medium 13, as shown in FIG. In this case, as shown in FIG.
The other end of the retract bar 21 is positioned downward according to the rotational movement of the joint 27. Also, retract bar
One end 21a of 21 is located at the upper horizontal portion 26a of the guide groove 26, as shown in FIG. Here, as shown in FIG. 12, the distal end of one end 21a of the retract bar 21 is engaged with the rotating shaft 25 of the carriage 23 (see FIG. 13).
In this case, one end 21a of the retract bar 21 is fixed without contacting the upper part 26d and the lower part 26e of the guide groove 26. Thus, when the carriage 23 moves in the radial direction of the recording medium 13, one end 21a
It does not adversely affect its movement without friction.

Next, when shifting from the loading state to the unloading state, as shown in FIG. 4, the carriage 23 moves to the outer peripheral side of the recording medium (arrow D). In accordance with the movement of the carriage 23, the position of the one end 21a of the retract bar 21
As shown in the figure, the upper part of the guide groove 26 moves from the upper horizontal part 26a to the slope part 26c, and further the lower part of the guide groove 26 unload part 2
Go to 6b. Due to the movement of the retract bar 21 (front-back direction), as shown in FIG. 8, the joint 27 rotates in the direction opposite to the direction at the time of loading (arrow E), and the other end 21b of the retract bar 21 rises. Thereby, as shown in FIG. 5, the other end 21b of the retract bar 21 comes into contact with the head arm 12, and the head 11 is lifted upward. Accordingly, the head 11 shifts from the load state shown in FIG. 9 to the unload state shown in FIG.
At a position distant from the retracted bar 21.

FIG. 14 is a plan view according to the second embodiment. In the second embodiment, the other end 21b of the retract bar 21 is formed in an arc shape centered on the rotation center of the carriage 23. With such a structure, as shown in FIG. 7, the other end 21b and the head arm 12 do not form a right angle at the time of loading, so that a situation in which the head 11 does not load horizontally can be prevented.

FIG. 15 is a side sectional view according to the third embodiment. Third
In the embodiment of the present invention, the retract bar 21 in which the piston 30 and the spring 31 are incorporated is provided at one end 21a of the retract bar 21.
Is used. Here, as shown in FIG. 13, one end 21a is configured as an elastic body, and is provided with a preload in the axial direction of the rotating shaft 25. In the third embodiment, in order to ensure such an operation, a preload is applied to the piston 30 by the spring 31 and the piston 30 operates by following the guide groove 26.

[Effects of the Invention] As described above in detail, according to the present invention, the head is reliably moved from the loaded state to the unloaded state or vice versa by moving the retract bar up and down in accordance with the movement of the carriage. it can. In this case, since there is no operation for moving the head arm on the ramp member or the like, it is not necessary to particularly increase the carriage driving force. Further, the unloading operation by the retract bar does not require any other driving source except for the driving source for driving the carriage. Thus, if the present invention is applied to, for example, a hard disk device, a load and unload operation of the head can be reliably performed, and a small-sized and high-performance device can be realized.

[Brief description of the drawings]

FIG. 1 is a plan view showing a configuration of a carriage mechanism according to a first embodiment of the present invention, and FIGS. 2, 4, and 7 are plan views for explaining the operation of the same embodiment. FIG. 3 is a side view when applied to the hard disk device of the embodiment,
FIGS. 5, 8, and 13 are side views of the same embodiment, respectively, and FIGS. 6 and 9 are front views of the same embodiment, respectively.
10 and 12 are perspective views of the same embodiment, respectively, FIG. 11 is a conceptual diagram for explaining the operation of the same embodiment, FIG. 14 is a plan view according to a second embodiment of the present invention, and FIG. FIG. 15 is a side sectional view according to a third embodiment of the present invention, and FIGS. 16 to 18 are views for explaining a conventional system. 11 ... head, 12 ... head arm, 13 ... recording medium,
21 ... Retract bar, 22 ... Bearing part, 23 ... Carriage.

Claims (2)

(57) [Claims] 1. A carriage mechanism of a data recording / reproducing apparatus for rotating a head arm member holding a head and moving the head in a radial direction of a disk serving as a recording medium, for rotating the head arm member. A driving means having a rotating shaft and a driving source for generating a rotational driving force, one end of which is engaged with the head arm member, and the other end of which is near a tip end of the head arm member holding the head. A retractable bar member having a structure that can be moved in the front-rear direction and the up-down direction by rotational driving of the head arm member by the driving unit; and when the head is loaded onto the disk, the head arm member is The other end of the retractable bar member is moved to the tip of the head arm member in accordance with the operation of moving to the inner diameter side of the disk. The retract bar member is driven to move away from the disk, and when the head is unloaded from above the disk, the head arm member moves to the outer diameter side of the disk and the other of the retract bar members is moved. A data recording / reproducing apparatus, comprising: a retract mechanism for driving the retract bar member so that an end thereof contacts the tip of the head arm member to support the head at a position away from the disk. Carriage mechanism. 2. A carriage mechanism of a data recording / reproducing apparatus for rotating a head arm member holding a head and moving the head in a radial direction of a disk serving as a recording medium, wherein the head arm member is rotationally driven. A driving means having a rotating shaft and a driving source for generating a rotational driving force, one end of which is engaged with the head arm member, and the other end of which is near a tip end of the head arm member holding the head. A retractable bar member having a structure that can be moved in the front-rear direction and the up-down direction by the rotation of the head arm member by the driving unit; and a retract bar member provided on the head arm member to support the retract bar member. Moving the other end of the retractable bar member up and down with the rotation of the head arm member; and Has a guide groove for guiding the movement in the longitudinal direction of the Kutoba member by the guide groove,
The retractable bar member is driven so that the other end is separated from the tip end of the head arm member in accordance with the operation of moving the head arm member toward the inner diameter side of the disk during the loading, and the head arm during the unloading. The retractable bar member is moved so that the other end contacts the tip of the head arm member to support the head at a position away from the disk with the operation of the member moving to the outer diameter side of the disk. A carriage mechanism for a data recording / reproducing apparatus, comprising: a retract mechanism for driving.