JPH0887842A - Recorder/player - Google Patents

Abstract

PURPOSE: To obtain a recorder/player equipped with a stopper mechanism for actuator in which attraction is prevented between a stopper member and the part touching the stopper. CONSTITUTION: The recorder/player comprises holders 39a, 39b for a voice coil 40 where an actuator 34 shifting a magnetic head 37 in the radial direction of a magnetic disc 33 serves as a stop part, and stopper rubbers 42a, 42b abutting against the holders 39a, 39b to regulate the movement of the actuator 34. Irregularities are formed on the surface of the stopper rubber 42a, 42b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus provided with a stopper mechanism for an actuator.

In recent years, a magnetic head has been lowered above the magnetic disk due to improvement in recording / reproducing quality of a magnetic disk device as a recording / reproducing apparatus. Therefore, it is necessary to reduce the impact in the stopper mechanism of the actuator that mounts the magnetic head.

[0003]

2. Description of the Related Art Conventionally, a magnetic disk device as a recording / reproducing device is provided with a stopper mechanism for preventing damage to the magnetic head due to runaway of an actuator carrying the magnetic head.

Therefore, FIG. 8 shows an explanatory view of a stopper mechanism of an actuator in a conventional magnetic disk device. FIG. 8A is a plan view of a main part of the magnetic disk device 11, in which the actuator 12 has the carriage 14 extending to one side of the rotary shaft 13 and the suspension arm 16 for mounting the magnetic head 15 attached to the tip thereof. There is.

On the other side of the rotary shaft 13, the holding portion 1
A voice coil 18 serving as a drive source is provided at 7. Further, a protrusion 19 is integrally formed at the end of the holding portion 17. The holding portion 17 (projection portion 19) is made of, for example, an aluminum-based metal.

Under the voice coil 18, two magnets of different polarities (not shown) are provided to form a voice coil motor (VCM) to move the magnetic head 15 in the radial direction of the magnetic disk 20.

On the other hand, in order to prevent the actuator 12 from running out of control, a stopper 21 that comes into contact with the protrusion 19 is provided.
a and 21b are attached to the attachment portions 22a and 22b, and are provided in a range that restricts the movement of the actuator 12. The protrusion 19 and the stopper mechanism are configured.

That is, as shown in FIG. 8B, the rotational drive of the actuator 12 is driven by the stopper 21 of the protrusion 19.
It is forcibly stopped in the state of contacting a and 21b. Further, in this contact state, the actuator 12 (magnetic head 15) comes to a stop position when the apparatus is stopped.

In this case, the stoppers 21a and 21b are made of, for example, fluororubber or the like and play a role of alleviating the impact on the magnetic head 15 when the actuator 12 is stopped.

[0010]

In order to improve the quality of recording and reproduction, the magnetic head 15 is lowered to the magnetic disk 20 and the flying height is reduced by about 30%. Therefore, if the flying height of the magnetic head is further lowered, the impact will cause the magnetic disk to come into contact with and damage the magnetic disk when it is stopped.
The hardness of 1a and 21b is reduced (for example, the hardness is about 45 degrees).

However, reducing the hardness of the stoppers 21a, 21b is done by the stoppers 21a, 21b and the protrusion 1
When the device is left unoperated for a long time, the protrusions 19 are attracted by the viscosity of the stoppers 21a and 21b and the locking force becomes equal to or larger than the design value, and the normal actuator is used. There is a problem in that it cannot be removed by supplying current for driving, and unstarting occurs.

Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a recording / reproducing apparatus which prevents the stopper contact portion and the stopper member from being attracted to each other.

[0013]

In order to solve the above-mentioned problems, according to a first aspect of the present invention, a locking portion is formed in an actuator for moving a head for recording / reproducing with respect to a recording medium in a radial direction of the recording medium. In a recording / reproducing apparatus in which a predetermined number of elastic members that contact the locking portion and regulate the movement range of the actuator are arranged, at least a portion of the elastic member that contacts the locking portion is releasable from each other. First to do
And a recording / reproducing apparatus in which the mold releasing portion of is formed.

According to a second aspect of the present invention, in the first release section according to the first aspect, the surface of the elastic member is formed in an uneven shape.

According to a third aspect of the present invention, in the first release section according to the first aspect, a release film is formed on the surface of the elastic member.

According to a fourth aspect of the present invention, an engaging portion is formed on the actuator for moving the head for recording / reproducing with respect to the recording medium in the radial direction of the recording medium, and the engaging portion abuts on the engaging portion to move the actuator. In a recording / reproducing apparatus in which a predetermined number of elastic members for restricting the above are arranged, a second releasing section that is releasable from each other is formed in a portion of the locking portion that abuts the elastic member. To do.

According to a fifth aspect of the present invention, in the second release section according to the fourth aspect, the surface of the engaging portion is formed in an uneven shape.

According to a sixth aspect, in the second release section according to the fourth aspect, the surface of the engaging portion is formed into a curved surface or a tapered surface.

[0019]

As described above, in the inventions of claims 1 to 3, the surface of the elastic member is formed in an uneven shape at least at the portion contacting the engaging portion, or the release film is formed on the surface. And a first mold release portion is formed. With this, even when the locking portion is in contact with the elastic member for a long time, the releasing property is good without being in close contact, and it is possible to prevent adsorption.

In the invention of claims 4 to 6, the surface of the engaging portion that abuts the elastic member is formed to have an uneven surface, or a curved surface or a tapered surface. As a result, even if the locking portion is in contact with the elastic member for a long time, they are not brought into close contact with each other, the contact area is reduced, the releasability is improved, and adsorption can be prevented.

[0021]

1 is a block diagram of the first embodiment of the present invention.
FIG. 1A shows a magnetic disk device 3 as a recording / reproducing device.
1 is a plan view of the inside of FIG. 1, and FIG. 1B is a cross-sectional view of an elastic member that constitutes the stopper mechanism.

The magnetic disk device 31 shown in FIG.
Is a frame 32 of the disk enclosure, and a predetermined number (for example, three) of magnetic disks 33 as recording media,
The actuator 34 and the like are arranged.

The actuator 34 is provided with a predetermined number (for example, four) of carriages 36 rotatably with respect to a rotary shaft 35, and a suspension arm 38 having a magnetic head 37 for recording and reproducing mounted on the carriage 36 at the tip thereof. Each can be attached.

On the opposite side of the rotary shaft 35 from the carriage, a holding member 39 which also serves as a locking portion is formed from the substantially central portion in the axial direction.
a, 39b are provided so as to extend, and holding bodies 39a,
Flat voice coil 4 so as to be sandwiched by 39b
0 is provided. The holders 39a and 39b are made of, for example, an aluminum-based metal, and have a flat contact surface with a stopper rubber described later.

On the other hand, the support column 41 which is erected at a position that regulates a predetermined range of movement of the actuator 34.
Stopper rubbers 42a and 42b, which are O-ring-shaped elastic members, are provided on a and 41b. This stopper rubber 42
As shown in FIG. 1 (B), a and 42b are formed in a concavo-convex shape by using, for example, fluororubber with the surface as the first mold release portion. For example, it can be formed by injecting liquid fluororubber into the mold. In this case, the magnetic disk 3
In view of the low flying height of No. 7, the hardness of the stopper rubbers 42a and 42b is reduced (for example, the hardness is about 45 degrees), and the impact on the magnetic head 37 at the time of stop is alleviated.

Returning to FIG. 1A, transmission and reception of a signal to and from each magnetic head 37 is performed via a flexible pattern circuit 43 with a printed circuit board 44 on which a head IC or the like is mounted. It is connected via a connector or the like to a control circuit board arranged on the bottom that does not appear.

Here, FIG. 2 shows a schematic side view of the relationship between the actuator of FIG. 1 and the magnetic disk. In FIG. 2, first, the three magnetic disks 33 are fixed to the spindle 52 of the spindle motor 51, and the motor unit is attached to the spindle 52 by the rotor unit 55 including the magnet 54 which is close to the coil 53 fixedly arranged by a predetermined number. It has a special structure.

On the other hand, in the actuator 34, the magnetic disks 33 are positioned between the carriages 36, and the six magnetic heads 37 mounted on the six suspension arms 38 attached to the respective carriages 36 rotate the magnetic field. Both sides of the disk 33 are in a floating state.

Further, magnets 56a and 56b are arranged close to the top and bottom of the voice coil 40 to form a voice coil motor (VCM).

Therefore, FIG. 3 shows an explanatory view of the stopped state of the actuator of FIG. Further, FIG. 4 shows an explanatory view of a contact state between the holding body and the stopper rubber.

In FIG. 3, by supplying a predetermined amount of current to the voice coil 40, the magnets 56a and 56b shown in FIG.
And the holding bodies 39a and 39b (voice coil 40) rotate in the direction of the arrow between the stopper rubbers 42a and 42b with the rotating shaft 35 as a fulcrum, depending on the polarity of the current. As a result, the magnetic head 37 is moved in the radial direction of the magnetic disk 33.

FIG. 4A shows a state before the holders 39a, 39b are in contact with the stopper rubbers 42a, 42b. In FIG. 4B, the holders 39a, 39b contact the stopper rubbers 42a, 42b. It shows the contact state. As shown in FIG. 4B, the stopper rubber 42a (42b)
Of the holder 39a (39
It does not come into close contact with b).

As a result, even if the holding body 39a (39b) and the stopper rubber 42a (42b) have been in contact with each other for a long time, they will not be in the adsorbed state and the releasability will be good when they are driven next. Become. Therefore, it is possible to improve reliability and performance without significantly changing the device.

Next, FIG. 5 shows another embodiment of the first embodiment.
FIG. As an elastic member in FIG.
The stopper rubber 61a, 61b of
Rubber member 61₁Release film 61 on the surface of the₂Also formed
Of. This release film 61 ₂Is, for example, a reactive oligo
Resins composed of monomers, monomers, photoinitiators, pigments, etc. are used.
The rubber member 61 is used by irradiating ultraviolet rays.
₁Is to be cured on the surface of.

As shown in FIG. 5B, when the actuator 34 is stopped, the holder 39a (39b) and the stopper rubber 61a (61b) are in contact with each other (contact state). In this case, the releasable film 61 is kept in this state for a long time.
_{By the value 2} , the adsorption state can be prevented, and the releasability becomes good when driven next time.

Next, FIG. 6 shows an explanatory view of essential parts of a second embodiment of the present invention. FIG. 6A shows a holder 71a (71b).
And the stopper rubber 62a (62b) are shown, and other parts are the same as in FIG.

That is, the stopper rubber 6 which is an elastic member
2a (62b) is made of, for example, soft fluororubber or the like, and the shape of the side portion (the portion that contacts the stopper rubber 62a (62b)) of the holding body 71a (71b) is the second shape.
The release part is formed in a curved shape (a tapered surface where the tip in the lateral direction becomes thin) may be formed.

As shown in FIG. 6B, the contact area between the holder 71a (71b) and the stopper rubber 62a (62b) when the actuator 34 is stopped is reduced. As a result, the attraction force is reduced compared to the conventional case even when these are in contact with each other for a long time.
During the next driving, the normal current can be supplied to the voice coil 40 to drive it.

Next, FIG. 7 shows an explanatory view of another embodiment of the second embodiment. FIG. 7A shows a holder 72a (72
FIG. 1B shows a portion between b) and the stopper rubber 62a (62b), and is otherwise similar to FIG. Also, the stopper rubber 6
2a (62b) is similar to FIG.

In this case, the shape of the side portion of the holder 72a (72b) (the portion contacting the stopper rubber 62a (62b)) is used as the second mold release portion to form the uneven surface 73.

As shown in FIG. 7B, when the actuator 34 is stopped, the holding body 72a (72b) and the stopper rubber 62a (62b) are not brought into close contact with each other even if they come into contact with each other. As a result, the suction state does not occur even in the contact state for a long time, and the actuator 34 can be driven with good releasability during the next driving.

[0042]

As described above, according to the inventions of claims 1 to 3, at least a portion of the elastic member that abuts the engaging portion,
By forming a first mold release part having a surface with an uneven surface or a mold release film formed on the surface, even if the locking part is in contact with the elastic member for a long time, the close contact is achieved. The release property is good and the adsorption can be prevented.

According to the fourth to sixth aspects of the present invention, the engaging portion is formed in a concave-convex shape or a curved surface or a tapered surface at the portion of the engaging portion that abuts the elastic member. Even when the elastic member is in contact with the elastic member for a long time, it is not adhered, the contact area is reduced, the releasability is improved, and adsorption can be prevented.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a first embodiment of the present invention.

FIG. 2 is a schematic side view of the relationship between the actuator of FIG. 1 and a magnetic disk.

3 is an explanatory diagram of a stopped state of the actuator of FIG. 1. FIG.

FIG. 4 is an explanatory view of a contact state between a holding body and a stopper rubber.

FIG. 5 is an explanatory diagram of another embodiment of the first embodiment.

FIG. 6 is an explanatory view of a main part of a second embodiment of the present invention.

FIG. 7 is an explanatory diagram of another embodiment of the second embodiment.

FIG. 8 is an explanatory diagram of a stopper mechanism of an actuator in a conventional magnetic disk device.

[Explanation of symbols]

31 magnetic disk device 34 actuator 35 rotating shaft 36 carriage 37 magnetic head 38 suspension arm 39a, 39b, 71a, 71b, 72a, 72b holding body 40 voice coil 42a, 42b, 61a, 61b, 62a, 62b stopper rubber 61 ₁ rubber member 61 ₂ Releasable film 73 Uneven surface

Claims (6)

[Claims] 1. A locking portion is formed on an actuator for moving a head for recording / reproducing on / from a recording medium in a radial direction of the recording medium, and the moving portion of the actuator is regulated by contacting with the locking portion. In a recording / reproducing apparatus in which a predetermined number of elastic members are arranged, a first releasing portion that is releasable from each other is formed at least in a portion of the elastic member that abuts the locking portion. Playback device. 2. The recording / reproducing apparatus according to claim 1, wherein the surface of the elastic member of the first mold releasing portion is formed in an uneven shape. 3. The recording / reproducing apparatus according to claim 1, wherein the first releasing portion has a releasing film formed on the surface of the elastic member. 4. A locking portion is formed on an actuator for moving a head for recording / reproducing with respect to a recording medium in a radial direction of the recording medium, and the locking portion is contacted with the locking portion to regulate a movement range of the actuator. In a recording / reproducing apparatus in which a predetermined number of elastic members are arranged, a second releasable portion which is releasable from each other is formed in a portion of the locking portion that abuts the elastic member. . 5. The recording / reproducing apparatus according to claim 4, wherein the engaging surface of the second mold releasing portion is formed in an uneven shape. 6. The recording / reproducing apparatus according to claim 4, wherein the surface of the engaging portion is formed into a curved surface or a tapered surface.