JPH03224181A - Device for approximating and separating signal scanner to and from recording medium - Google Patents

Abstract

PURPOSE:To eliminate a need of a private motor for the operation of an approximating and separating device to simplify the constitution by providing a lift arm which is provided with a pin, which is freely approximated to and separated from a part on the magnetic disk side of a floating magnetic head supporting member, in the vicinity of one end part and is provided with a prescribed slope and an engaging face, which is engaged with a carriage, in the other end part. CONSTITUTION:When a carriage 2 is moved toward a magnetic disk D, a lift arm 22 which is provided with a pin 23, which is freely approximated to and separated from a part on the magnetic disk D side of a floating magnetic head supporting member 21, in the vicinity of one end part and is provided with a prescribed slope 26 and an engaging face 27, which is engaged with the car riage 2, in the other end part is moved by energizing springs 28 and 29 until its one end part approaches the magnetic disk D most. The lift arm 22 is turned with a revolving shaft 24 as the center by another energizing spring 31 so that one end part of the list arm 22 approaches faces of fixing parts 14 and 15 most. Thus, the motor or the like only for the approximating and separating mechanism is unnecessary to simplify the constitution.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a device for bringing a signal scanner into and out of contact with a recording medium, which has a function of loading and unloading a signal scanner onto and from a recording medium.

(Prior Art) A magnetic recording and reproducing method that records and reproduces information signals magnetically records information signals on a magnetic recording medium, and
Since information signals can be extremely easily reproduced from a magnetic recording medium using a magnetic head as a signal scanner, it has been widely used as a means of recording and reproducing information signals in many technical fields. However, as the demand for recording various information signals at high recording densities has increased, high-density recording and reproducing of information signals has come to be performed using magnetic recording and reproducing systems as well.

Incidentally, the general configuration of magnetic disk drives, which have been widely used as storage devices in various information processing devices, is such that they can be attached and detached so that high-density recording and playback can be performed without being affected by dust. A magnetic disk that is fixed to the rotating shaft of a drive motor in an inoperable state, a floating magnetic head, a magnetic disk rotation drive mechanism, a magnetic head displacement drive mechanism, etc. are sealed in a container. However, since this conventional general magnetic disk device is originally configured in such a way that the magnetic disk cannot be removed from the drive rotation shaft, it is difficult to use a floating magnetic head. There was no need to think about moving the magnetic disk to a position distant from the position of the magnetic disk, but in a magnetic disk device where the magnetic disk can be replaced freely, the floating magnetic head is moved magnetically when replacing the magnetic disk. It is required to move the disk to a position spaced from the position of the disk.

A mechanism for loading and unloading a floating magnetic head onto a magnetic disk in a magnetic disk device in which the magnetic disk is replaceable as described above has also been proposed, for example, in Japanese Patent Publication No. 63-29351.

(Problem to be Solved by the Invention) However, in the conventional example of a mechanism for loading and unloading a floating magnetic head onto a magnetic disk in the above-described magnetic disk device, the floating magnetic head does not move toward or away from the magnetic disk. The mechanism for loading and unloading (loading and unloading) has a complicated structure, such as having a dedicated drive motor, and even when a floating magnetic head is unloaded onto a magnetic disk, A floating magnetic head is placed above the magnetic disk (
The problem has been that it is difficult to actually replace the magnetic disk because the magnetic disk is located in a space (or below).

(Means for Solving Problem W) The present invention supports a signal scanner that is displaced and driven to a predetermined recording/reproducing area and landing area of a recording medium as well as to an area outside the recording medium by movement of a carriage. a lift arm equipped with a pin near one end that can freely approach and separate from a portion of the recording scanning element support member on the recording medium side; and a lift arm equipped with a predetermined inclined surface and an engagement surface with the carriage at the other end; A rotation shaft that supports the lift arm rotatably in a direction perpendicular to the direction in which the lift arm extends, and a groove that guides the movement of the rotation shaft over a predetermined distance in the extension direction of the lift arm. a fixing section; a spring that biases the foot arm toward the side where the recording medium is present; a spring that biases the other end of the lift arm away from the surface of the fixing section; and a lift as described above. A device for bringing a signal scanner into contact with and separating from a recording medium is provided, which includes means for regulating the movement state of an arm and means for regulating the movement range of an arm.

(Function) The floating magnetic head is designed to be able to move to a predetermined recording/reproducing area and landing area of the recording medium as well as to an area outside the recording medium as the carriage moves.

When loading a floating magnetic head onto a magnetic disk, a carriage on which the floating magnetic head is attached is moved toward the magnetic disk.

When the carriage is moved toward the magnetic disk, a floating magnetic head support member that supports the floating magnetic head is provided with a pin near one end that can freely move toward and away from the magnetic disk side portion. One end of the lift arm, the other end of which is provided with a predetermined inclined surface and a surface that engages with the carriage, is moved by a biasing spring to a state where it is closest to the magnetic disk; The lift arm is rotated about the rotation axis by a biasing spring different from the biasing spring described above so that one end of the lift arm is brought closest to the surface of the fixed part. be moved.

As a result, the pin provided near one end of the lift arm is separated from the magnetic disk side portion of the floating magnetic head support member that supports the floating magnetic head, and The head is movable by a carriage within the recording/reproducing area while floating above the surface of the magnetic disk rotating at high speed.

Further, when unloading the floating magnetic head from the magnetic disk, the carriage on which the floating magnetic head is attached is moved away from the magnetic disk.

When the carriage moves in the above-described direction and the engaging portion of the carriage engages the inclined surface provided at the other end of the lift arm, the lift arm rotates around the rotation axis at one end of the carriage. rotates away from the fixed part.

As a result, the pin provided near one end of the lift arm comes into contact with the portion of the floating magnetic head support member on the magnetic disk side, and by the subsequent four rotations of the lift arm, the aforementioned floating magnetic head is separated from the magnetic disk surface.

Next, as the carriage is moved further away from the magnetic disk, the engaging part of the carriage and the engaging part of the lift arm engage with each other, and then, by moving the carriage in the same direction as described above, the lift is lifted. Since the arm also moves together with the carriage, the pin provided near one end of the lift arm of the floating magnetic head remains in contact with the portion of the floating magnetic head support member on the magnetic disk side. , and is moved to a position far away from the magnetic disk.

(Embodiments) Hereinafter, specific details of a device for bringing a signal scanner into contact with and separating from a recording medium according to the present invention will be described in detail with reference to the accompanying drawings. 1 and 3 are fragmented perspective views showing a part of the main parts of the apparatus for approaching and separating the signal scanner for the recording medium of the present invention, and FIG. 2 is the recording medium of the present invention with the carriage removed. FIGS. 4 to 6 are side views of the apparatus for approaching and separating a signal scanner from and to a recording medium according to the present invention for explaining the operation thereof.

In FIG. 1, 2 is a carriage, and this carriage 2 has a linear ball bearing 7 fixed to it.
〜10 Linear ball bearing 7.8 is guide rod 4
In addition, linear ball bearings 9 and 10 are slidably mounted on the guide rod 6, and a moving coil 12 in a carriage driving linear motor 11 is fixed to the carriage 2. There is.

Therefore, when a drive current is supplied to the moving coil 12 in the carriage drive linear motor 11,
The carriage 2 fixed to the moving coil 12 is moved back and forth along the guide rods 4 and 6 by the electromagnetic force generated between the magnetic field of the permanent magnet 13 and the above-mentioned moving coil 12.

Components designated by drawing numbers 48 to 50 in FIG. 1 are mechanical parts that prevent the carriage 2 from moving freely when an external force is applied to the device in an inactive state. It is a locking mechanism that locks the carriage 2 to a fixed part of the device by engaging a hook part 49 formed at the tip of the operating rod 48 and an engaging part 50 provided on the linear ball bearing 9. ing. The aforementioned operating rod 48 engages the hook portion 49 provided thereon with the engaging portion 50 provided on the linear ball bearing 9 by the operation of a plunger magnet (not shown).
It is configured so that it can be removed.

Both ends of the guide rods 4 and 6 described above are fixed to the fixed part of the device by supporting members,
For convenience of illustration, only the supporting members 3 and 5 at one end of each guide rod 4 and 6 are shown in FIG.

An actuator 20 of a tracking control system of a signal scanner (hereinafter, the signal scanner will be referred to as a floating magnetic head) is fixed to the carriage 2 described above. As the actuator 20, for example, one configured as a direct acting voice coil motor may be used.
In the illustrated actuator 20, a support body 39 made of an elastic material
．． A floating magnetic head support member 21 is rotatably connected to a mounting member 42 fixed to one end of a movable shaft 41 supported by a movable shaft 40 .

In the illustrated configuration example, the mounting member 42 and the floating magnetic head support member 21 are connected by the pivots 43 and 43 protruding from the mounting portion 42 and the floating magnetic head support member 21. Although it is said that this is done by a pivot receiving hole, the mounting member 42 and the support member 21 of the floating type magnetic head are not separated from each other, and the mounting member 42 and the supporting member 21 of the floating type magnetic head 46 are .47 is urged in the direction of the surface of the magnetic disk D with a predetermined pressure, the two are coupled by, for example, magnetic attractive force or the elasticity of a suitable elastic body.

Therefore, when a drive current is supplied to the movable coil 12 of the carriage drive linear motor 11 and the carriage 2 is moved back and forth along the guide rods 4 and 6,
The floating magnetic heads 46, 47 are driven to be displaced to a predetermined recording/reproducing area and landing area of the magnetic disk D, as well as to an area outside the magnetic disk.

By the way, the above-mentioned floating type magnetic head 46°47 is
From the outer area of the magnetic disk D to the magnetic disk D
In the case of loading the magnetic disk D by moving it toward the magnetic disk, and in the case of unloading the floating magnetic head 46, 47 that performs recording and reproducing operations in the recording and reproducing area of the magnetic disk from the magnetic disk D. The floating magnetic head 46, 47 must be smoothly brought close to the 0th surface of the magnetic disk, or the floating magnetic head 46, 47 must be smoothly moved away from the 0th surface of the magnetic disk. .

Therefore, in the apparatus for approaching and separating a signal scanner for a recording medium of the present invention, a pin 23 that can freely approach and separate from the magnetic disk side portion of the floating magnetic head support member 21 that supports the floating magnetic head is provided. The above-mentioned inclined surface 26 on the other end side of the lift arm 22 is provided near one end and has a predetermined inclined surface 26 and an engagement surface 27 with the engagement portion 2a of the carriage 2 at the other end. The lift arm 22 is rotated or moved about the rotation shaft 24 depending on the state of engagement between the engagement surface 27 and the engagement portion 2a of the carriage 2 and the state of movement of the carriage 2. Let me do it,
A pin 23 attached to the lift arm 22 allows the floating magnetic heads 46 and 47 to be smoothly loaded onto the magnetic disk D via the floating magnetic head support member 21, and to load the floating magnetic heads 46 and 47 smoothly from the magnetic disk. It is set to be unloaded.

FIG. 2 shows the actuator 20 so that the main parts of the device for approaching and separating the signal scanner from and to the recording medium of the present invention are clearly shown.
FIG. 3 is a perspective view showing an enlarged part of FIG. This is the fixed part of the device.

1 and 3, the device for approaching and separating the signal scanner for the recording medium of the present invention loads and unloads a floating magnetic head on only one surface of the magnetic disk D (the upper surface of the magnetic disk). This is a configuration example in which a floating magnetic head can be loaded and unloaded on each of the front and back surfaces of the magnetic disk D. The drawings are simplified by showing the approaching/separating apparatus of the configuration examples shown in FIGS. 4 to 6 with the components for the back side of the magnetic disk D removed.

In addition, in FIG. 2 and FIGS. 4 to 6, each component indicated by using numbers in parentheses as drawing symbols is a device for moving a floating magnetic head toward and away from the back side of a magnetic disk D. Components indicated by the same drawing reference numerals regardless of the presence or absence of parentheses are components of the same configuration that correspond to each other regardless of the presence or absence of parentheses. 2 and 4 to 6, in which floating magnetic heads can be individually loaded and unloaded on each of the front and back surfaces of the magnetic disk D. The floating magnetic head approaching and separating devices to be provided on each surface side of the magnetic disk D in the floating type magnetic head approaching and separating device of the configuration example shown are of the same configuration. Therefore, in the following explanation, the floating type magnetic head approach/separation device whose specific configuration is shown in FIGS. 1 and 3 (FIGS. 2 and 3) will be used. In FIGS. 4 to 6, only the constituent parts whose drawing symbols are indicated by numbers only will be described.

The lift arm 22 shown in the drawing has a pin 23 implanted near one end thereof, and a predetermined inclined surface 26 and a carriage engagement surface 27 at the other end.
The lift arm 22 is rotatably supported by a rotation shaft 24 via a bearing 25.

Flange members 35 and 36 are fixed near both ends of the rotating shaft 24, and the tip of the rotating shaft 24 protruding from the collar members 35 and 36 is provided on the fixed part 14. It is inserted into a guide groove 18 and a guide groove 19 provided in the fixing part 15 so that it can move along the guide grooves 18 and 19.

The side planar portions of each of the collar members 35 and 36 described above are connected to the guide grooves 1 provided in the fixing portions 14 and 15 described above.
8.19 to restrict the movement of the rotation shaft 24, the above-mentioned guide groove 18.1
9, the lift arm 22 is kept in a state where it does not swing in the left-right direction. Note that by moving the lift arm 22 in the front-rear direction with the side surface of the lift arm 22 in sliding contact with the position regulating member 30 having a surface that is in contact with the side surface of the lift arm 22 described above, the above-mentioned The swinging of the lift arm 22 in the left-right direction can be made extremely small to the extent that there is no problem in practical use.

A coil spring 28.2 is connected between the rotation shaft 24 and the member 32.33 protruding from the fixed part 14.15.
9 is tensioned, and the coil spring 28.2
The lift arm 22 mentioned above with reference to 9 carries the magnetic disk D.
is energized so that it approaches the direction in which it exists.

The lift arm 22 also includes the rotation shaft 24, a member 34 protruding from the lift arm 22, and a fixed portion 14.
One end of the lift arm 22 is biased toward the surface of a stopper 37 protruding from the above-mentioned fixing part by a torsion coil spring 31 stretched between the groove 18 and the groove 18. .

The above-mentioned lift arm 22 engages the engaging portion 2a of the carriage 2 with respect to the inclined surface 26 and the engaging surface 27 provided thereon.
When the pins 23 provided on the lift arm 22 are not engaged, as shown in FIG. In other words, the floating magnetic heads 46 and 47 are completely separated from the floating magnetic head approach and separation device consisting of the lift arm 22 and other components, and the floating magnetic heads 46 and 47 are completely separated from magnetic head 46
．． While the magnetic disk 47 is floating above the magnetic disk D, it is driven and displaced within the recording/reproducing area of the magnetic disk D as the carriage 2 moves.

The lift arm 22 in the above state is at the tip of the rotation shaft 24 which rotatably supports the lift arm 22 by the biasing force of the coil springs 28 and 29 described above and the biasing force of the torsion coil spring 31. As shown in FIG. 2, the lift arm 22 is brought into contact with the forwardmost portion of the guide grooves 18 and 19, and the lift arm 22 is brought closest to the magnetic disk D. , with the other end of the lift arm furthest away from the surface of the fixed part of the device.

The lift arm 22 is brought into contact with a stopper 37 that projects from the fixed part.

FIG. 5 shows the carriage 2 from the state shown in FIG. 4, in which the floating magnetic heads 46 and 47 are floating above the magnetic disk D and are being driven and displaced within the recording/reproducing area of the magnetic disk D.
moves away from the magnetic disk D, and the floating magnetic head 46.47 changes from the loading state to the unloading state in the landing area of the magnetic disk D, or the floating magnetic head 46. The carriage 2 moves in the direction of the magnetic disk D from the state shown in FIG. 6 in which the floating magnetic head 47 is separated from the magnetic disk D.
47 indicates the moment when the landing area of the magnetic disk D changes from the unloading state to the loading state.

That is, when the loading state is changed to the unloading state in the landing area of the magnetic disk D, the lift door 422 is moved by the inclined surface 26 provided thereon.
Since the engaging portion 2a of the carriage 2 is engaged with the lift arm 22, the lift arm 22 is
The lift arm 22 rotates clockwise in FIG.
7 is in sliding contact with a stopper 38 protruding from the fixed part,
Further, as the lift arm 22 rotates clockwise, the pin 23 provided at one end of the lift arm 22 comes into contact with the magnetic disk side portion of the support member 21 of the floating magnetic head. The supporting member 2 of the floating magnetic head is installed so that the floating magnetic head 46, 47 is later separated from the magnetic disk surface.
1 is driven for displacement.

Further, when the lift arm 22 is changed from the unloaded state to the loaded state in the landing area of the magnetic disk D, the engaging portion 2a of the carriage 2 is engaged with the inclined surface 26 provided thereon. By changing from the state to the disengaged state, the lift arm 22
The stopper 37 rotates counterclockwise in FIG. 5 about the rotation shaft 24 and projects from the fixed part.
The lift arm 22 is brought into contact with the surface of the lift arm 22, and the protrusion 17 at the other end of the lift arm 22 is separated from the stopper 38 protruding from the fixed part, and the lift arm 22 is rotated counterclockwise. By rotating in the circumferential direction, the pin 23 provided at one end of the lift arm 22 moves to the support member 2 of the floating magnetic head.
The supporting member 21 of the floating magnetic head is displaced and driven so that the floating magnetic head 46, 47 comes into contact with the magnetic disk surface away from the magnetic disk side portion of the floating magnetic head 1.

Figure 6 shows a state in which the floating magnetic heads 46 and 47 have been displaced to a position far away from the magnetic disk D so that operations such as replacing the magnetic disk D can be easily performed. In the state shown in the sixth figure, as the carriage 2 moves in the direction away from the magnetic disk D, the engaging portion 2a of the carriage 2 is engaged with the engaging surface 27 of the lift arm 22. Lift arm 22 in condition
The carriage 2 also moves integrally with the carriage 2.

The pin 23 of the lift arm 22 is in contact with the magnetic disk side portion of the floating magnetic head support member 21 during the above-mentioned moving operation, and also during the above-mentioned movement of the carriage 2. Arm 22
moves while the protrusion 17 at the other end is in sliding contact with a stopper 38 protruding from the fixed part.

(Effects of the Invention) As is clear from the above detailed explanation, the device for approaching and separating a signal scanner from a recording medium according to the present invention is capable of moving a signal scanner to and from a predetermined recording/reproducing area and landing area of the recording medium as the carriage moves. In addition, in order to load the floating magnetic head, which can move to areas outside the recording medium, onto the magnetic disk, the carriage on which the floating magnetic head is attached is moved toward the magnetic disk. The floating magnetic head support member that supports the floating magnetic head is provided with a pin near one end that can move toward and away from the magnetic disk, and a predetermined inclined surface and a carriage at the other end. The lift arm is moved to the state where one end of the lift arm, which has an engaging surface, is closest to the magnetic disk by a biasing spring. The lift arm is rotated about the rotation axis so that one end of the lift arm is brought closest to the surface of the fixed part by the biasing spring, and thereby the lift arm described above is rotated. The pin provided near one end is separated from the magnetic disk side portion of the floating magnetic head support member that supports the floating magnetic head, and the floating magnetic head is connected to a high-speed rotating magnetic field. The magnetic head can be moved by a carriage through the recording and reproducing area while floating above the disk surface, and when the floating magnetic head is unloaded from the magnetic disk, the floating magnetic head is attached. When the carriage is moved away from the magnetic disk, the engaging part of the carriage engages with the inclined surface provided at the other end of the lift arm, and the lift arm rotates about the rotation axis. Then, one end of the lift arm rotates away from the fixed part, and as a result, a pin provided near one end of the lift arm comes into contact with a portion of the floating magnetic head support member on the magnetic disk side.
After that, the above-mentioned floating magnetic head is separated from the magnetic disk surface by the lift arm rotation [4 operations], and then, as the carriage is moved further away from the magnetic disk, the engaging portion of the carriage is moved away from the magnetic disk surface. The engaging portion of the lift arm engages with the engagement portion, and then, as the carriage moves in the same direction as described above, the lift arm also moves integrally with the carriage, and the floating magnetic head is installed near one end of the lift arm. The signal scanner for the recording medium of the present invention is moved to a position away from the magnetic disk while the pin attached thereto remains in contact with the portion of the floating magnetic head support member on the magnetic disk side. The approaching/separating device does not require a dedicated motor to operate the approaching/separating device, so the configuration is simple, and the loading mechanism can be installed inside the fixed part of the device, making the device compact. Furthermore, since the approaching/separating device is completely unrelated during the recording/reproducing operation, the existence of the approaching/separating device does not have a negative effect on the original operation of the recording/reproducing device. Since the magnetic head can be retracted to a remote position, there are advantages such as the fact that the magnetic head can be replaced very easily.

[Brief explanation of drawings]

1 and 3 are partially exploded perspective views showing essential parts of a device for approaching and separating a signal scanner for a recording medium according to the present invention;
The figure is a plan view of the apparatus for bringing the signal scanner into contact with and separating from the recording medium of the present invention with the carriage removed, and FIGS. It is a side view of a separation device. 1.14, 15, 16...fixing part of the device, 2...carriage, 2a...engaging part of carriage 2, 3,5...
...Support member, 4, 6... Guide rod, 7 to 1o linear ball bearing, 11... Linear motor for carriage drive, 12... Moving coil, 13... Permanent magnet, 1
8゜19...Guide groove, 20...Tracking control system actuator, 21...Flying type magnetic head support member, 22...Lift arm, 23...Pin, 2
4... Rotating shaft, 25... Bearing, 26... Inclined surface,
27... Engagement surface, 28. 29... Coil spring, 3o... Position regulating member having a surface that contacts the side surface of lift arm 22, 31... Torsion coil spring,
32, 33... A member protruding from the fixed part 14.15, 34... A member protruding from the fixed part 15, 35.3
6... Flange member, 37, 39, 40... Elastic body support, 38... Stopper protruding from the fixed part, 41.
...Movable axis.

Claims (1)

[Claims] Contact with the recording medium side portion of the recording scanning element support member that supports the signal scanning element which is displaced and driven to a predetermined recording/reproducing area and landing area of the recording medium as well as to an area outside the recording medium by the movement of the carriage. A lift arm having a removable pin near one end and a predetermined inclined surface and a surface for engaging with a carriage at the other end; a rotating shaft rotatably supported by the lift arm; a fixing portion provided with a groove for guiding the movement of the rotating shaft over a predetermined distance in the extending direction of the lift arm; a spring that biases the other end of the lift arm away from the surface of the fixed portion;
A device for moving a signal scanner toward and away from a recording medium, comprising means for regulating the movement state of the lift arm and means for regulating the movement range of the lift arm.