JPH0616348B2 - Carriage mechanism in disk device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a carriage mechanism of a read / write head in a disk device (for example, a disk-type recording medium inspection device), and particularly detects the position of the carriage. Detection means for

[Conventional technology]

In the magnetic disk inspection apparatus, in order to detect the position of the carriage of the read / write head, as shown in FIG. 11, a plurality of sensors (for example, optical sensors) A to D are arranged side by side in the moving direction of the carriage E. Therefore, the detection is performed by the difference in the output signals of the sensors A to D based on the difference in the positional relationship between the plate-like member F attached to the side of the carriage E and the sensors A to D. As an example, when the carriage E is positioned at a position (home position) for waiting the carriage E when attaching or detaching the magnetic disk, the plate-like member F just approaches between the sensors C and D, and the reading / writing is performed. When the carriage E is positioned at a position (load position) at which the carriage E is stopped when the head is loaded and unloaded by the loading device, the plate-like member F causes the sensor B just as shown in FIG. And C, and when the carriage E is located at a position (inner position) where the carriage E is located when the read / write head faces the innermost track of the magnetic disk, the plate-like member F is just positioned. Sensors A to B so that they are placed between sensors A and B
The position B is set, and the plate-like member F approaches the sensors A to D while the carriage E is moving, so that the carriage E reaches the home position, the load position, and the inner position, respectively. I was trying to detect.

[Problems to be solved by the invention]

By the way, in the magnetic disk detection device recently developed by the applicant, there is a magnetic disk detection device capable of inspecting any of a plurality of types of magnetic disks having different diameters. In such a magnetic disk inspection apparatus, the load position of the carriage changes according to the diameter of the mounted magnetic disk. Therefore, when the position of the carriage is detected by the above-mentioned method in such a magnetic disk inspection apparatus, as shown in FIG. 12, the load position detecting sensors B ', ..., C' ,. The number of disks must be increased depending on the type of disk, which increases the burden of the mounting work, complicates the signal processing of the sensor, and raises the cost of the device.

The present invention has been made in view of the above points, and in an inspection device capable of inspecting any of a plurality of types of disc-type recording media having different diameters, loading is performed without being affected by the difference in the diameter of the disc-type recording medium. An object of the present invention is to provide a carriage mechanism equipped with a detection means capable of detecting a position with a simpler configuration.

[Means for solving problems]

A carriage mechanism according to the present invention mounts a read / write head supported by a flexible support member, moves a carriage for accessing the recording disk, and a predetermined carriage along a moving path of the carriage. A loading member disposed in a position and displacing between a first position and a second position, the loading member pushing the support member to unload the head from the disk surface in the first position. In the second position, the loading device releases the pressing of the loading member against the support member to load the head onto the disk surface, and a plurality of predetermined devices according to the diameter of the disk type recording medium to be applied. The loading device to position the loading device at a position corresponding to one of the loading positions of A loading device positioning mechanism that moves integrally with the carriage and a detection device that is fixed at a predetermined position on the side of the loading device and that detects that the carriage has reached a predetermined relative position with respect to the loading device, that is, a load position. Means for controlling the loading or unloading of the head by the loading device based on the output of the detecting means.

[Action]

The loading device is arranged at a predetermined position along the movement path of the carriage, and includes a loading member that is displaced between a first position and a second position. The reading / writing head according to the displacement of the loading member. Load / unload of. The carriage is movable relative to the loading device, and when the carriage reaches a predetermined relative position with respect to the loading device, that is, a loading position, a detection means fixed at a predetermined position on the loading device side is provided. Detect this.

On the other hand, a loading device positioning mechanism for moving the loading device integrally with the carriage is provided, and the loading device is positioned at a position corresponding to one of a plurality of predetermined loading positions according to the diameter of the disc type recording medium to be applied. To position. Thus, when changing the diameter of the applicable disk-type recording medium, the loading device positioning mechanism moves the loading device integrally with the carriage, and the placement is adjusted to the disk diameter. As a result, the relative positional relationship between the carriage and the loading device does not change regardless of the diameter of the disk type recording medium applied. That is, when loading or unloading the read / write head with respect to the disk type recording medium having any diameter, the carriage and the loading device have the same relative positional relationship when performing the loading or unloading. Therefore, by detecting that the carriage has reached the load position with respect to the loading device positioned at the position corresponding to the load position according to the diameter of the disc type recording medium by the detection means fixed to the loading device, The load position can always be detected by a single detecting means without being affected by the diameter of the recording medium.

〔Example〕

An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows an embodiment of a carriage mechanism according to the present invention. This carriage mechanism is used, for example, in a magnetic disk inspection device capable of inspecting both 3.5 inch type disks and 5 inch type disks.

In the figure, a carriage 1 is placed on a carriage rail 2, and a coil portion 3a of a voice coil motor 3 is attached to a rear portion (a right portion in the drawing) of the carriage 1. Further, a magnesium portion 3b of the voice coil motor 3 is provided behind the carriage 1 separately from the carriage 1. The carriage 1 moves on the rail 2 by driving the voice coil motor 3.

As shown in FIG. 2, the reading / writing heads 4b to 4a are mounted on the carriage 1 via leaf spring-shaped head gimbals 4a to 7a.
7b are supported in multiple layers. (Note that the head gimbals 4a to 7a and the heads 4b to 7b are not shown in FIG. 1, and the carriage 1 and the like are shown in a simplified manner in FIG. 2.) The heads 4b and 5b are magnetic. It corresponds to the upper disk 23 of the two magnetic disks 23 and 24 having the same diameter, which are mounted in a layered manner on a spindle portion (not shown) in the disk inspection apparatus. Head 6b
7b correspond to the lower disk 24. As described above, the disks 23 and 24 are 3.5 inch disks or 5 inch disks. Further, as shown in the figure, a plate 19 is fixedly attached to the carriage 1 on the side of the carriage 1.

Returning to FIG. 1, the loading device 8 includes heads 4b to 4b.
7b is loaded and unloaded. The base blocks 27 and 28 of the loading device 8 are respectively supported by the loading device moving rail 25, and the base block 28 on the right side of the drawing in the depth of the drawing is oriented in a direction substantially parallel to the rail 25. The piston rod 26a of the air cylinder 26 is fixedly connected. The loading device 8 is moved along the rail 25 by driving the air cylinder 26.

The loading device 8 includes bearing brackets 9 and 10.
The loading brackets 11 and 12 are rotatably supported by the bearing brackets 9 and 10. As shown in FIG. 2, the loading bar 11 is located between the head gimbals 4b and 5b, and the loading bar 12 is located between the head gimbals 6b and 7b. (In the figure, the bearing bracket 10
Are not shown. The loading bar 11 has a long diameter portion longer than the space between the gimbals 4b and 5b and a short diameter portion shorter than the space, and at least both ends of the long diameter portion are rounded. Loading bar 1
The configuration of 2 is also similar to this.

As shown in FIG. 3, the loading device 8 is provided with a DC motor 15 having a worm 16 attached to the tip thereof. The worm wheel 1 having a spur gear 18 mounted on the same shaft is engaged with the worm 16. As an example, spur gears 13 and 14 each having a diameter 1.5 times that of the spur gear 18 are attached to the tips of the loading bars 11 and 12, and the spur gears 13 and 14 mesh with the spur gear 18. ing. This allows loading bar 1
The motors 1 and 12 are driven by the DC motor 15 to rotate at an angular velocity of 2/3 of the worm wheel 17. The rotation speeds of the loading bars 11 and 12 are determined in this way
This is for speed control of load and unload operations.

As shown in FIG. 4, when the loading bar 11 is in the rotational position with the long diameter portion oriented in the vertical direction, the gimbals 4 a and 5 a are abutted and pushed to bend, and the heads 4 b and 5 b are unloaded from the disk 24. . Further, as shown in FIG. 5, when the loading bar 11 is rotated by 90 ° from the state of FIG.
No contact with the gimbals 4a and 5a, and the heads 4b and 5b are loaded on the disk 24. The loading and unloading operations of the heads 6b and 7b by the loading bar 12 are also the same.

An L-shaped stopper 20 is fixedly attached to the rear portion of the loading device 8. As shown in FIG. 2, the lower end portion of the stopper 20 is in contact with the back surface (the surface on the right side of the drawing) of the plate 19.

A proximity switch 38 is attached to the stopper 20. As shown in FIG. 10, the proximity switch 38
Faces the back surface of the plate 19 that is in contact with the stopper 20, and the distance between the back surface and the proximity switch 38 is within the operating distance range of the proximity switch 38. Therefore, when the stopper 20 and the plate 19 are in contact with each other, the proximity switch 38 detects the plate 19. The proximity switch 38 is not shown in FIG.

Returning to FIG. 1, the loading device 8 has a protrusion 21a.
A clamp 21 including the above is rotatably supported by the bearing bracket 9. As shown in FIG. 2, the protrusion 2
1a contacts the front surface of the plate 19 (the surface on the right side in the figure) when the clamp 21 is at the predetermined rotation position. As shown in FIG. 3, the loading device 8 includes a worm wheel 1
Another worm wheel 22 with the same diameter as 7 is worm 1
6, the clamp 21 is mounted on the same axis as the worm wheel 22.
As a result, the clamp 21 rotates with the loading bars 11 and 12 at the same angular velocity as the worm wheels 17 and 22 (that is, at an angular velocity 1.5 times the loading bars 11 and 12) based on the drive of the DC motor 15.

The relationship between the rotation positions of the clamp 21 and the loading bars 11 and 12 is shown in FIG. As shown in the drawing, when the loading bars 11 and 12 are in the rotational position with the long diameter portion oriented in the vertical direction, the clamp 21 is protruded by the protrusion 21.
The rotational positional relationship between the two is set so that a is just in contact with the front surface of the plate 19. As a result, when the heads 4a to 7a are unloaded, the protrusion 21a comes into contact with the plate 19.

Next, the positional relationship between the clamp 21 and the stopper 20 is shown in FIG. As shown in the drawing, when the loading bars 11 and 12 are rotated 90 degrees from the state of FIG.
The arrangement relationship between the clamp 21 and the stopper 20 is set so that the corner just contacts the lower surface of the stopper 20. In other words, since the rotation speed of the clamp 21 is 1.5 times that of the loading bars 11 and 12 as described above, the clamp 21 comes into contact with the stopper 20 at the rotation position rotated by 135 ° from the state shown in FIG. Stopper 20
The arrangement relationship between the clamp and the clamp 21 is set as follows.
This is to prevent the DC motor 15 from overrunning after the drive current is cut, and to reliably stop the rotation of the loading bars 11 and 12 with the long diameter portion oriented in the lateral direction.

Returning to FIG. 1, among the pillars 29 supporting the loading device moving rail 25, the pillars 29 on the left side of the drawing include:
A loading device stopper 30 is attached.
As shown in FIG. 8, this loading device stopper 3
0 indicates that both ends are supported by the pillar 29 and the supporting portion 31.
A book guide rail 30 is included. Guide rail 32
Is substantially parallel to the rail 25 and movably supports the block 33. An abutting portion 33a is provided on the upper portion of the block 33 at the same height as the screw 28a attached to the lower portion of the base block 28 of the loading device 8.

For the pillar 29, screw 3 with the tip facing the side of the block 33.
4 is attached in a semi-fixed state. Also, the support portion 31
Also, the screw 35 is attached in a semi-fixed state with the tip end facing the block 33 side. As shown in the figure, the position of the screw 34 is such that the tip of the screw 28 a of the base block 28 of the loading device 8 is in contact with the contact portion 33 a of the block 33 when the tip of the screw 34 is in contact with the block 33.
The carriage 1 having the plate 19 in contact with the stopper 20 of the loading device 8 is set so as to be positioned at the load position with respect to the discs 23 and 24 of 3.5 inch type when the plate 19 comes into contact with. . On the other hand,
As shown in FIG. 9, the position of the screw 35 is such that when the tip of the screw 35 is in contact with the block 33, the screw 28
When the tip of a contacts the contact portion 33a, the plate 19
The carriage 1 which is brought into contact with the stopper 20 is set so as to be located at the load position with respect to the 5-inch disks 23 and 24.

A block moving screw 36 is rotatably attached to the column 29 with its tip facing the block 33 side. A compression spring 37 is provided between the block 33 and the column 31 so as to surround the guide rail 32 on the upper side of the drawing. The block 33 moves in the right direction of the drawing while compressing the spring 37 by tightening the screw 36 and abutting and pressing the tip of the screw 36, and as shown in FIG. It comes into contact. Further, the block 33 is moved leftward in the figure by the screw 36 being loosened and pressed by the restoring force of the spring 37, and comes into contact with the tip of the screw 34.

In this carriage mechanism as well, a sensor and a plate member as shown in FIG. 11 are provided to detect at least the home position and the inner position, but they are not shown.

An example of the load position detecting operation in the carriage mechanism having the above-described configuration will be described below in association with other operations in the carriage mechanism.

When the 3.5-inch type disks 23 and 24 are inspected by the magnetic disk inspection apparatus, the block moving screw 36 is loosened and the block 33 is screwed into the screw 34 as shown in FIG.
Abut. Then, the air cylinder 26 is driven to push out the piston rod 26a, and the loading device 8 is moved to the left in FIG. Then, the lower end portion of the stopper 20 presses the back surface of the plate 19, so that the carriage 1 located at the home position is connected to the loading device 8 and moves in the same direction.
When the screw 28a of the base block 28 abuts on the abutting portion 33a of the block 33, the loading device 8 stops, and thus the carriage 1 also stops. At this time, as described above, the carriage 1 has the 3.5-inch type disks 23 and 24.
It has been positioned at the load position with respect to.

When the carriage 1 is moved forward from the load position to inspect the disks 23 and 24 by the heads 4b to 7b, the DC motor 15 is driven to load the heads 4b to 7b by the loading bars 11 and 12. ,
The voice coil motor 3 is driven to move the carriage 1 leftward in FIG. As the heads 4b to 7b are loaded, the loading bars 11 and 12 and the clamp 21
Based on the above relationship, the clamp 21 rotates at a predetermined speed and the protrusion 21a is gently separated from the plate 19, so that the carriage 1 is separated from the loading device 8 and moves independently.

When the carriage 1 reaches the inner position and the inspection is completed, the voice coil motor 3 moves the carriage 1 to the load position side this time. When the carriage 1 approaches the loading device 8 and the plate 19 and the stopper 20 are positioned within a certain distance range from each other,
The proximity switch 38 detects the plate 19. By stopping the driving of the voice coil motor 3 based on this detection signal, the carriage 1 is again moved to the load position for the 3.5-inch type disks 23 and 24 (that is, the loading device 8 stopped by the loading device stopper 30). The stopper 20 is positioned exactly at the position where the plate 19 abuts).

Next, the VC motor 15 is driven to load the loading bar 11,
After unloading the heads 4b to 7b by 12, the air cylinder binder 26 is driven to pull back the piston rod 26a, and the loading device 8 is moved to the right in FIG. Then, as the heads 4b to 7b are unloaded, the clamp 21 rotates at a predetermined speed and the protrusion 21a gently contacts the front surface of the plate 19, so that the protrusion 21a presses the front surface of the plate 19 and the carriage 1 is connected to the loading device 8 and moves in the same direction to return to the home position.

On the other hand, when inspecting the 5 inch type disks 23 and 24, after tightening the block moving screw 36 and bringing the block 33 into contact with the screw 35 as shown in FIG. The loading device 8 and the carriage 1 are moved by the air cylinder 26. Then, the loading device 8 abuts against the abutment portion 33a of the block 33 and stops, so that the carriage 1 is moved to the abutment position 5a as described above.
It is positioned at the load position with respect to the inch type disks 23 and 24. When the carriage 1 is moved from the inner position to the load position after the above-described inspection is completed, the proximity switch 38 detects the plate 19 in the same manner as described above, and therefore the voice coil motor 3 is detected based on this detection signal. By stopping the driving of the carriage 1, the carriage 1 is again moved to the 5-inch disk 23,
Positioned at the load position for 24.

As described above, in this carriage mechanism, it is possible to detect that the carriage 1 has reached the load position by the same proximity switch 38 when inspecting either a 3.5-inch type or a 5-inch type magnetic disk. it can.

In this embodiment, whether or not the plate of the carriage and the stopper of the loading device are located within a predetermined distance range is detected by the proximity switch attached to the stopper, but it is detected by other appropriate detecting means. You may do it.

[Advantages of the Invention] As described above, according to the carriage mechanism of the present invention,
Whether or not the carriage has reached the load position can always be detected by the same detection means regardless of the difference in the diameter of the disk-type recording medium mounted. Therefore, it is possible to avoid the burden of providing a large number of detecting means for detecting the load position according to the difference in the diameter of the disk-type recording medium, the complication of signal processing, etc., and to reduce the cost of the apparatus. Can also contribute.

[Brief description of drawings]

1 is a perspective view showing an embodiment of a carriage mechanism according to the present invention, FIG. 2 is a perspective view showing a partial detail of FIG. 1,
FIG. 3 is a perspective view showing the relationship between the DC motor and the loading bar and the relationship between the DC motor and the clamp shown in FIG. 1, and FIG. 4 shows the state in which the read / write head is unloaded by the loading bar shown in FIG. The side view shown in FIG.
FIG. 6 is a side view showing a state where the read / write head is loaded by the loading bar shown in FIG. 6, FIG. 6 is a side view showing the rotational position relationship between the loading bar and the clamp shown in FIG. 1, and FIG. 7 is a stopper shown in FIG. It is a side view which shows the arrangement relation of a clamp. FIG. 8 is a partial cross-sectional side view showing details of the configuration of the loading device stopper of FIG. 1, and FIG. 9 shows a state in which the block is in contact with the tip of the screw attached to the support portion in FIG. FIG. 10 is a side view showing a partial cross section, FIG. 10 is a side view showing a proximity switch attached to the stopper shown in FIG. 1, and FIGS. 11 and 12 are top views schematically showing an example of a conventional sensor for detecting the position of a carriage. Is. 1 ... Carriage, 2 ... Carriage rail, 3 ... Voice coil motor, 4a-7a ... Gimbal, 4b-7
b ... Read / write head, 8 ... Loading device,
9, 10 ... Bearing bracket, 11, 12 ... Loading bar, 13, 14, 18 ... Spur gear, 15 ...
... DC motor, 16 ... worm, 17,22 ... worm wheel, 19 ... plate, 20 ... stopper, 2
1 ... Clamp, 21a ... Protrusion, 23, 24 ... Magnetic disk, 25 ... Loading device moving rail, 2
6 ... Air cylinder, 26a ... Piston rod, 2
7, 28 ... Base block, 28a, 34, 35 ...
Screws, 29 ... Supports, 30 ... Loading device stoppers, 31 ... Supports, 32 ... Guide rails, 33 ...
Block, 33a ... Contact part, 36 ... Block moving screw, 37 ... Compression spring, 38 ... Proximity switch

Claims (2)

[Claims] 1. A carriage for mounting a read / write head supported by a flexible support member and moving the head for accessing the recording disk, and a carriage arranged at a predetermined position along a moving path of the carriage. A loading member that is displaced between a first position and a second position, the loading member pushing the support member to unload the head from the disk surface at the first position. , A loading device for releasing the pressing of the loading member with respect to the support member at the second position to load the head onto the disk surface, and a plurality of predetermined load positions according to the diameter of the disk type recording medium to be applied. The loading device integral with the carriage to position the loading device at a position corresponding to one of the A loading device positioning mechanism that moves; and a detection unit that is fixed at a predetermined position on the side of the loading device and that detects that the carriage has reached a predetermined relative position with respect to the loading device, that is, a load position. A carriage mechanism in a disk device, wherein loading or unloading of the head by the loading device is controlled based on an output of the detection means. 2. The carriage mechanism in a disk device according to claim 1, wherein the disk device is an inspection device capable of inspecting any of a plurality of types of disk type recording media having different diameters.