JPH09161418A - Recorder and load arm - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the impact resistance and the resistance to vibration by providing a load/unload mechanism for always keeping a disc in no contact with a slider to avoid damage or the like of the slider and the disk caused by adhesion, sliding or contact between the slider and disc. SOLUTION: In a magnetic disk device, a disc rotation mechanism 200, a positioning actuator 201 and a load/unload mechanism 8 are arranged on a base 2. In the mechanism 200, a disk 1 is laminated on a spindle motor mounted on the base 2 at a certain interval and fixed on a spindle motor rotation part by a disk keeper 3 and rotates at a high speed with the rotation of the motor. When a current flows through a coil on the opposite side of a load arm 5 with respect to a rotating shaft, a carriage 4 makes an oscillatory motion centered on a pivot by a magnetic field of a magnet 10 to accomplish a positioning operation for reading or writing information. As an actuator oscillates from a load state and moves within the disk, a hook 6 on an arm 5 glides down from a member 8 to keep the slider 7 floating.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage device,
In particular, it relates to a device for loading and unloading a slider having a read / write element mounted on a disk holding stored information.

[0002]

2. Description of the Related Art A storage device requires a slider to float above a disk in order to read and write information stored on the disk. As one of the methods, a contact start stop (hereinafter abbreviated as CSS) method causes the slider to fly above the disk. In other words, from the state where the slider equipped with the read / write element is in contact with and resting on the disk, the slider and disk repeatedly contact and slide with the start of disk rotation, and the slider and disk are gradually separated. It is a method of floating. When the rotation of the disk slows down or stops, the flying height of the slider decreases and the slider and the disk repeatedly contact and slide, and when the disk stops, the slider contacts and stands still on the disk.

As another method, there is a dynamic load / unload method in which a slider is directly floated on a rotating disk. Japanese Patent Publication No. 6-503440 discloses a device for providing dynamic loading and unloading of a slider. According to that specification, the load / unload mechanism comprises a lift tab extending asymmetrically from the end of a load arm supporting the slider. The free end of the lift tab cooperates with the cam surface on the cam assembly to impart a roll to the slider as the slider is loaded or unloaded onto the disc to provide dynamic loading and unloading of the slider. doing. US Pat. No. 4,933,785 discloses a lift button located on the longitudinal axis of a load arm that cooperates with a cam surface on a cam assembly to provide dynamic loading and unloading of a slider. .

[0004]

In the CSS method, a slider having an element for reading and writing is in contact with the disk and is stationary when the disk is not rotating. When the disk starts to rotate, the slider separates from the disk while repeatedly contacting and sliding with the disk. Further, when the disc stops rotating, the slider repeatedly contacts and slides with the disc and stops on the disc as the disc rotation stops. In such a series of operations, there is a risk that the stored information on the disk will be lost due to damage and abrasion of the disk surface and slider air bearing surface caused by the contact and sliding between the slider and the disk. Further, when the slider is stationary on the disk, the slider and the disk may stick to each other, increasing the required starting torque of the spindle motor and possibly causing the disk to be unable to rotate. Therefore, the first purpose is to prevent the slider and the disk from being damaged, worn, and adhered inevitably in the CSS method.

In the dynamic load unloading method of loading and unloading the slider on the rotating disk in a floating state, the slider is directly floated on the rotating disk, so that the slider and the disk collide depending on the loading conditions. There is a risk of In order to avoid the collision between the slider and the disk during the loading operation, it is necessary to smoothly fly the slider over the disk. That is, the attitude of the slider needs to be prevented from rotating around the longitudinal direction of the slider (the roll angle is almost zero). Therefore, a second object of the present invention is to provide a storage device including a dynamic load / unload mechanism that makes the posture of the slider zero when the slider is loaded on a rotating disk. . A third object of the present invention is to provide a dynamic load unload mechanism that does not impart a twist to the load arm when the load arm is lifted from the disc. Fourth Embodiment of the Present Invention
It is an object of the present invention to provide a dynamic load unload mechanism without adding a member that loses the symmetry of the load arm that supports the slider. A fifth object of the present invention is to provide a dynamic load unload mechanism having no complicated structure.

[0006]

To achieve the first object, a load arm for supporting a slider provided with a hook portion and a support member for hooking up the hook provided on the load arm are provided. In the unloading state, the hook portion of the load arm and the supporting member are fitted to each other, thereby forcibly separating the slider and the disc. During the loading operation, the hook portion slides down on the support member, so that the slider floats on the disk. In the loaded state, the support member does not affect the access movement of the load arm. During the unloading operation, the hook part slides up on the support member, so that the slider is forcibly separated from the disc.

In order to achieve the second object, the contact point between the hook portion and the support member passes through the roll rotation center of the slider,
It is provided on a line parallel to the longitudinal direction of the slider.

In order to achieve the third object, the contact point between the hook portion and the supporting member is provided on the twist center line of the load arm so that the load arm is not twisted.

In order to achieve the fourth object, the hook portion of the load arm is formed by forming a part of the load arm symmetrically without adding other members.

In order to achieve the fifth object, a notch is formed in a part of the load arm by etching or the like, and a hook is formed by bending.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION

(Embodiment 1) As one embodiment of the present invention, a case where a load / unload mechanism is added to a magnetic disk device is shown in FIG.
The load / unload mechanism will be described below. The magnetic disk device includes a disk rotation mechanism 200, a positioning actuator 201, and a load / unload mechanism 8 on the base 2. The disc rotating mechanism 200 is formed by laminating the discs 1 on a spindle motor (not shown) mounted on the base 2 at a certain interval, fixing the discs 1 to the spindle motor rotating portion by the disc retainer 3, and laminating the discs as the spindle motor rotates. The circular disc 1 is adapted to rotate at high speed.
The positioning actuator 202 includes a carriage 7 that supports a head suspension assembly (hereinafter abbreviated as HSA) 201 that includes a slider 7 that mounts an element that reads and writes information, and a load arm 5 that supports the slider 7, and a magnet 10. The carriage 4 has a rotation shaft and has a coil (not shown) located on the opposite side of the load arm 5 with respect to the rotation shaft. When a current flows through the coil, the magnetic field generated by the magnet 10 causes the carriage 4 to perform an oscillating motion around the pivot, and perform a positioning operation for reading and writing information. The load arm 5 has a hook 6. As one form of the present invention, a supporting member 8 of a load / unload mechanism is shown in FIG.
Provided on the outer circumference of the disc as shown in. The loading / unloading state will be described with reference to FIG. When the positioning actuator swings and moves to the outer circumference of the disk,
As shown in FIGS. 5A and 5B, the hook 6 on the load arm 5 is caught by the support member, and the slider is unloaded from the disk as the load arm 5 moves. When the positioning actuator swings from the unloaded state and moves to the inner circumference of the disk, the load arm 5
The slider 6 is loaded on the disk by the hook 6 on the upper side sliding down from the support member 8 and is in a floating state. As described above, since the disc 1 and the slider 7 can be always separated from each other, damage and wear between the disc 1 and the slider 7 do not occur, which leads to improvement in reliability. It is also possible to enhance shock resistance / vibration resistance by linking with a shock or vibration sensor (not shown) and unloading the slider 7 when shock or vibration is applied to the magnetic disk device. .

FIG. 2 shows a desirable shape of the HSA in the magnetic disk device equipped with the load / unload mechanism shown in FIG. 2 (a) is a top view of HSA, and FIG. 2 (b) is H.
The side view of SA is shown. As shown in FIG. 2A, the load arm 5 includes a hook 6 that is the same member as the load arm 5.
It has. The slider 7 is supported on the load arm 5 directly or via a gimbal spring (not shown). As shown in FIG. 2 (b), the hook 6 projects toward the side opposite to the slider 7 with respect to the surface of the load arm 5, and
It is open to the slider 7 side. As shown in FIG. 2C, the slider 7 such as the load arm 5a and the hook 6a is provided.
It may be opened on the opposite side. In FIG. 2A, the hooks are formed symmetrically with respect to the longitudinal centerline of the load arm. The hook is formed so as to project to the surface of the load arm so that the support member 8 can be inserted between the load arm and the hook. By setting the shape and installation position of the hook in this way, and hooking the hook up or down by the support member, the twist of the load arm and the posture change of the slider 7 with respect to the disk 1 can be reduced, and Without colliding with the slider,
It is loaded and unloaded.

(Embodiment 2) In the magnetic disk device having the load / unload mechanism shown in FIG.
One desirable shape of is shown in FIG. 3A shows a top view of the HSA, and FIG. 3B shows a side view of the HSA. FIG.
As shown in (a), the load arm 15 includes a hook 16 that is the same member as the load arm 15. The slider 17 is supported on the load arm 15 directly or via a gimbal spring (not shown). As shown in FIG. 3 (b), the hook 16 projects toward the side opposite to the slider 17 with respect to the upper surface of the load arm 15 and is open toward the slider 7. The hook 16 is provided with a convex projection 19 on the mounting side of the slider 17. Figure 3 (c)
As shown in, the opening may be on the side opposite to the slider 17 like the load arm 15a and the hook 16a. FIG.
In (a), the hook is formed symmetrically with respect to the longitudinal centerline of the load arm. Further hook 1
The protrusion 19 provided on the hook 6 is arranged on the center line in the longitudinal direction of the load arm. The hook 16 and the projection 19 are formed so that the support member 8 can be inserted between the load arm and the hook so as to project from the surface of the load arm. By setting the shape and installation position of the hook in this way, the hook can be hooked up by the support member,
When sliding down, the protrusion 19 becomes a contact point,
Moreover, since the protrusion 19 exists on the center line in the longitudinal direction of the load arm, the twist of the load arm and the disk 1 of the slider 7
The posture change with respect to is reduced, and loading / unloading is performed without the disk and slider colliding. The contact between the protrusion 19 and the support member 8 becomes a point contact, and the occurrence of wear can be suppressed.

(Embodiment 3) In the magnetic disk device with the load / unload mechanism shown in FIG.
FIG. 4 shows a desirable shape of the. 4 (a) and 4
(B) shows a top view of HSA and a side view of HSA. As shown in FIG. 4A, the load arm 25 includes a hook 26 that is the same member as the load arm 25. The slider 27 is supported on the load arm 25 directly or via a gimbal spring (not shown). Hook 26
As shown in FIG. 4 (b), the load arm 25 projects from the upper surface of the load arm 25 on the side opposite to the slider 27, and is open to the slider 27 side. The hook 26 is formed with a convex groove on the mounting side of the slider 27, and the shape of the hook 26 may be, for example, a semicircular shape, a V-shaped groove shape, or a U-shaped groove shape. With such a hook shape, rigidity of the hook portion is increased, deformation of the hook when the hook is lifted is reduced, and loading / unloading can be performed with high accuracy. As shown in FIG. 4C, the slider 27 such as the load arm 25a and the hook 26a is provided.
It may be opened on the opposite side. In FIG. 4A, the hooks are formed symmetrically with respect to the longitudinal centerline of the load arm. The hook 26 is formed so that the support member 8 can be inserted between the load arm and the hook so as to project from the surface of the load arm. By setting the shape and installation position of the hook in this way, when the hook is pulled up by the support member or slid down,
Since the lower surface of the grooved portion of the hook 26 serves as a contact point and supports on the twist center line of the HSA, the twist of the load arm and the attitude change of the slider 7 with respect to the disk 1 are reduced, and the disk and the slider collide. Without loading and unloading.

(Embodiment 4) FIG. 6 shows an embodiment of the present invention. A metal sheet for making the load arm 5 is shown in FIG. The load arm is usually formed by cutting a thin metal plate (for example, a stainless metal plate) into a desired shape by etching, bending each part, and then performing a welding operation such as a gimbal or a mount so that the disk and the slider are joined together. A load bending is performed to give a pressing force between them, and individual pieces are cut and completed from the metal sheet. In this series of steps, the metal sheet is processed into a hook portion as shown in FIG. 6 by etching or the like, and a hook is bent and a flange portion is grooved using another mold. Further, it is possible to form the convex portion on the hook portion in one stroke. If processed by this method, it is almost the same as the conventional load arm manufacturing process, so that mass production can be performed easily and accurately. As a method for processing the metal sheet shown in FIG.
Pressing with a die may be used.

(Embodiment 5) FIG. 7 shows an embodiment of the present invention. FIG. 7A is a diagram showing a positional relationship between the HSA, the disc and the support member, and FIG. 7B is a diagram showing the structure of the support member. As shown in FIG. 7A, the support member is installed on the outer circumference of the disc. The HSA hook that has moved to the outer peripheral side by the actuator is unloaded by being bent and caught by the hook support member 100 that is inclined so that the inner peripheral side of the disk is low and the outer peripheral side of the disk is high. . When loading, the hook support member 10
Slide down on the top of the hook with a hook in HSA. FIG.
As shown in (b), the support member sandwiches the hook support member 100 for lifting the hook and the hook support member 100,
Fix it. The entire supporting member is fixed to the base 2.
By making the structure of the support member as shown in FIG. 7B, it is possible to facilitate the assembly and arrange the support member with high accuracy. Further, since the positioning actuator is used as the driving force for loading and unloading, the device can be easily assembled.

(Embodiment 6) An embodiment of the present invention is shown in FIG. FIG. 8A is a diagram showing the positional relationship between the HSA, the disc and the support member, and FIG. 8B is a diagram showing the structure of the support member. As shown in FIG. 8A, the support member is installed on the outer circumference of the disc. As shown in FIG. 8B, the support member is a hook support member 100 for lifting the hook and members 103a, 103 for sandwiching and fixing the hook support member 100.
By reciprocating b and 103c in the direction indicated by A by the magnetic force of the solenoid 102, the hook support member 100 is caught by the hook and separates the slider from the disc. The solenoid 102 is fixed to the base 2. Since the magnetic force of the solenoid 102 is used as the driving force for loading and unloading, the loading and unloading can be performed reliably and at arbitrary timing. In addition, it is possible to load and unload by a magnetic force when a shock or vibration is applied in cooperation with a shock sensor or a vibration sensor, which is advantageous for improving shock resistance and vibration resistance.

(Embodiment 7) An embodiment of the present invention is shown in FIG. FIG. 9 shows the flow when the load / unload mechanism operates. When a disturbance such as vibration or acceleration due to shock or drop is applied to the magnetic disk device, the sensor 30 mounted on the base 2 or the electric board detects the disturbance and converts it into an electric signal, and the signal comparator 31 Sent. The signal comparator 31 determines whether to retract the HSA to the load / unload member according to a preset threshold value of the disturbance input. When the signal comparator 31 needs to retract the HSA to the load / unload member, a signal is sent to the actuator control circuit 32 to drive the positioning actuator 202 and retract the HSA onto the load / unload member 8. After the evacuation, when the time during which the disturbance input to the sensor 30 becomes smaller than the set threshold value reaches a certain value, the evacuation state is released, and the HSA returns to the disc 1. The sensor detects the disturbance signal when the device suddenly vibrates or is shocked while using the magnetic disk device.
Since it is retracted to the load / unload member so as to eliminate the contact between the disk and the slider, it is advantageous in improving the impact resistance and vibration resistance.

[0019]

As described above, according to the present invention, the disc and the slider can be always separated from each other, so that the slider and the disc are inevitably adhered and slid to each other, which is inevitable in the conventional CSS method. It is possible to avoid damage to the slider or the disk due to contact. Further, according to the present invention, since the slider is supported by the supporting member so that the slider does not have a roll angle, the slider and the disk are prevented from colliding with each other during the process from the unloading state to the slider floating state.
In addition, impact resistance and vibration resistance are improved by systematically detecting external impact and vibration and unloading at the time of shock and vibration.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of the appearance of a magnetic disk device and the arrangement of a load / unload mechanism.

FIG. 2 is an explanatory view of one shape of a hook.

FIG. 3 is an explanatory view of one shape of a hook.

FIG. 4 is an explanatory view of one shape of a hook.

FIG. 5 is an explanatory diagram of a loading / unloading operation.

FIG. 6 is an explanatory view of manufacturing a load arm having a hook.

FIG. 7 is an explanatory diagram of an example of a support member.

FIG. 8 is an explanatory view of an example of a support member.

FIG. 9 is an explanatory diagram of an operation procedure of the load / unload mechanism.

[Explanation of symbols]

1 ... Disc, 2 ... Base, 3 ... Disc holder, 4 ... Carriage, 5 ... Load arm, 6 ... Hook, 7 ... Slider, 8
... Support member.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Eiichi Kodaira 2880 Kokufu, Odawara-shi, Kanagawa Hitachi Storage Systems Division, Inc. Machinery Research Laboratory (72) Inventor Tomio Suzuki 2880 Kozu, Odawara City, Kanagawa Stock Company Hitachi Storage Systems Division

Claims (8)

[Claims] 1. A storage device comprising a load arm for supporting a slider, an actuator for moving the load arm to a target position, and a spindle motor for rotating a disc at a high speed. By having means for contacting and supporting the hook, the hook and the means for supporting the hook cooperate to load and unload the slider on the disk, and A storage device comprising a load / unload mechanism for keeping a disk and the slider in a non-contact state at all times. 2. A storage device comprising a load arm for supporting a slider, an actuator for moving the load arm to a target position, and a spindle motor for rotating a disc at a high speed, the load arm having a hook. The loading and unloading of the slider on the disk in cooperation with the means for supporting the hook, and the portion for supporting the hook is configured such that the posture of the slider has a roll angle of substantially zero. By
A storage device comprising a load / unload mechanism for keeping the disk and the slider in a non-contact state at all times. 3. A load arm supporting a slider, wherein the load arm is provided with a hook, and the hook is formed by notching and bending a part of the load arm. 4. A storage device comprising a load arm for supporting a slider, an actuator for moving the load arm to a target position, and a spindle motor for rotating a disk at a high speed, the load arm having a hook. , A function of loading and unloading the slider on the rotating disk by cooperation of the hook and a means for supporting the hook in contact with each other, and a means for supporting the hook in the hook portion. A storage device comprising a load / unload mechanism that keeps the disk and the slider in a non-contact state by being configured such that the point of action of force does not twist the load arm. 5. The hook according to claim 4, wherein the hook portion is provided with a projection, and the projection is located on the twist center line of the load arm, whereby the point of action of the force from the means for supporting the hook is increased. A storage device provided with a load / unload mechanism for preventing the load arm from twisting and for keeping the disk and the slider in a non-contact state at the time of loading / unloading the slider on the rotating disk. 6. The storage device according to claim 2, wherein the hook portion has a U shape, a V shape, or a semicircular shape. 7. A storage device comprising a load arm for supporting a slider, an actuator for moving the load arm to a target position, and a spindle motor for rotating a disk at a high speed, wherein the load arm has a hook. The means for contacting and supporting the hook is located on the outer circumference of the disk and is fixed to the base so that the driving force for loading / unloading is obtained from the actuator for moving the load arm to a desired position. A storage device comprising a configured load / unload mechanism. 8. A storage device comprising a load arm for supporting a slider, an actuator for moving the load arm to a target position, and a spindle motor for rotating a disk at a high speed, the load arm having a hook. The means for supporting the hook is located on the outer circumference of the disk and fixed to the base. The means for supporting the hook is moved by an external driving force to load the
A storage device comprising a load / unload mechanism for performing unloading.