JPS6083279A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To prevent a magnetic head from wearing by arranging a magnetic head opposite to a stabilizing plate across a discoid recording medium, providing a movable body at the circumference of this magnetic head, and moving forth this movable body from the tip of the magnetic head toward the disk when neither recording nor reproduction is performed. CONSTITUTION:A solenoid 20 is powered off in a stand-by state and the movable body 12 is energized with the tensile force of a tension spring 16 to rotate until it contacts a stopper 17. Consequently, the tip part of the movable body 12 moves forth slightly from the tip part of the magnetic head 11 toward the disk. Therefore, the disk 1 and magnetic head 11 do not contact each other. The projection part 23 of the movable body 12 contacts the disk 1 instead, so the disk 1 is put between the stabilizing plate 22 and the projection part 23 of the movable body 12 and continues to rotate stably. Thus, the wear of the head 11 is eliminated. Further, the disk 1 never vibrates abnormally.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a magnetic recording/reproducing device used in an electronic camera, etc., which records and reproduces information on a disc-shaped recording medium (hereinafter referred to as a disk), and in particular, relates to a magnetic recording/reproducing device used in an electronic camera, etc., which records and reproduces information on a disk-shaped recording medium (hereinafter referred to as a disk). The present invention relates to an improvement in a means for preventing wear of a magnetic head in a standby state, that is, in a standby state.

[Prior art]

In recent years, two-dimensional semiconductor W + I! A so-called electronic camera system has been put into practical use, which performs photoelectric conversion using an element, records the resulting signal on a small flexible disk, and reproduces it using a television monitor or the like.

In the magnetic recording/reproducing device used in the above-mentioned electronic camera system, the relative speed between the disk and the 9.1-degree head is usually between 7.5 rn,/s and 5.7 m.
/S is a large value. Therefore, in order to keep the contact pressure between the disk and the magnetic head at an appropriate level for the purpose of stably rotating the disk without vibration, instead of the conventionally used pad made of a soft material such as fer l~, A stabilizer plate made of a hard material is used.

On the other hand, in electronic cameras, recording is not possible unless the disk is rotating at a certain high speed (usually 390 RPM).For this reason, electronic cameras generally drive only the disk to rotate during non-recording and playback, and go into standby mode. A standby mode is provided in which the disc is left in the standby mode, and recording is possible immediately when a photo opportunity arises.If the disk and magnetic head remain in contact with each other in the standby state, the magnetic head may fail. As a means of preventing wear of the magnetic head in such a standby state, conventional methods have been implemented or proposed.In other words, by separating the stabilizer plate from the disk, the disk The contact pressure between the magnetic head and the magnetic head is lowered, or the contact between the disk and the magnetic head is cut off by moving the magnetic head away from the disk.

However, the two methods described above each have the following drawbacks. In the method of separating the stabilizer from the disk, although the contact pressure between the disk and the magnetic head is reduced, the contact state still continues and 1. As the stabilizer separates from the disk, it loses its function as a stabilizer and causes abnormal vibrations in the disk. Therefore, wear on the magnetic head is not completely eliminated, and moreover, there is a risk that the magnetic head and disk may be damaged.

In particular, when the stabilizer is separated, the contact angle between the disk and the magnetic head is different from that during normal recording and playback, and even if the contact pressure is small, the relative speed between the disk and the magnetic head is large, so the magnetic head may become abnormal. There is a risk of wear to the shape. As a result, when the magnetic head comes into contact with the disk again during recording and reproduction, there is a possibility that the magnetic head will hit the disk unevenly.

Furthermore, although the positional relationship between the stabilizer and the disk needs to be maintained with high precision, in the main type, the stabilizer is moved, so the above positional relationship is distorted each time. It had some drawbacks, such as being cluttered.

On the other hand, in the method of separating the magnetic head from the disk, the positional relationship between the magnetic head and the disk requires higher precision than the positional relationship between the stabilizer and the disk. Since it is necessary to move the magnetic head with high precision, it is necessary to use a magnetic head holding means that can move the magnetic head in two directions, the radial direction of the disk and the direction perpendicular to the recording surface of the disk, and maintain its position with high precision. Support will be required.

However, it is technically extremely difficult to support a magnetic head with the above-mentioned support means, and even if it were possible, there was a problem in that the cost would be extremely high.

〔the purpose〕

It is an object of the present invention to prevent wear of at least the magnetic head and to maintain sufficiently stable relative positional accuracy between the stabilizer plate, the disk, and the magnetic head during disk rotation during standby state, that is, during non-recording/playback. It is an object of the present invention to provide a magnetic recording/reproducing device which is simple in structure and low in cost.

〔overview〕

In order to achieve the above object, the present invention is characterized by the following structure. First, a stabilizer plate that stabilizes the rotation of the disk-shaped recording medium is brought into contact with a flexible disk-shaped recording medium that is rotationally driven by a motor, and the disk-shaped recording medium is attached to this stabilizer plate. A magnetic head for recording and reproducing information is arranged on the disc-shaped recording medium so as to face each other at a distance lυ, and a movable body is provided around this magnetic head, and when not recording or reproducing, this movable body is inserted from the tip of the magnetic head. The present invention is characterized in that the magnetic head is moved away from the disk by advancing toward the disk, and during recording and reproduction, the magnetic head is brought into contact with the disk by retreating the movable body.

〔Example〕

1 to 3 are diagrams showing a first embodiment of the present invention. FIG. 1 shows a schematic plan view, FIGS. 2 and 3 are partial views seen from the direction of the arrow in FIG. 1, FIG. 2 shows the state during recording and reproduction, and FIG. Shows the state during recording and playback.

In FIGS. 1 to 3, 1 is a disk, and the rotation of a disk drive motor 2 fixed on a concrete (not shown);
It is loaded on shaft 3. 4 is a head holding plate, which has elongated guiding holes 4a, 4b, 4. c is fitted into support columns 5, 6.7 which are implanted on the base body, and is supported so as to be slidable in the vertical direction in FIG. A female threaded portion 8 is formed at one end of the head holding plate 4, and this threaded portion 8 is screwed into a male threaded portion 10 formed on a spindle of a Stella pin and a motor 9 fixed on the base body. Further, the head holding plate 4
A magnetic head 11 is fixed to the magnetic head 11, and a frame-shaped movable body 1 made of metal such as stainless steel surrounds the magnetic head 11.
2 has been installed. The movable body 12 is rotatably supported by a support shaft 15 inserted between the tips of angles 13 and 14 fixed on the base body. The movable body 12
A tension spring 16 is hung between one end 1' 2a and the head holding plate 4, and these tension springs 16 cause the movable body 12 to rotate around the spindle 15 as shown in FIGS. 2 and 3. It is urged to rotate in the 31 direction. However, stopper 1
7 restricts the rotation range of the movable body 12.

Male screws 1 and 8 are formed at the base end of the above-mentioned strike:y pawl 17, and are screwed into the rut screw provided on the head holding plate 4.Therefore, the above-mentioned j:it screw '18 The height of the stopper 17 can be adjusted by adjusting it. 22 is a stabilizing plate, which is held by an arm (not shown) fixed on the base.

One drive surface of the stabilizing plate 22 is in contact with the disk 1 with a predetermined pressure, thereby stabilizing the rotation of the disk 1. The stabilizer plate 22 is indicated by a chain double-dashed line in FIG.

Next, the operation of the apparatus configured in this way will be explained. When recording and reproducing, the disk 1 is rotated by the motor 2 and the solenoid 20 is energized. Then, the plunger 21 is attracted, and the movable body 12 overcomes the tensile force of the tension spring 16 and rotates in the counterclockwise direction about the support shaft 15, as shown in FIG. As a result, the protrusion 23 of the movable body 12 separates from the disk 1, and the magnetic head 11 comes into contact with the disk 1, as shown in FIG. Therefore, the disk 1 rotates stably while being sandwiched between the stabilizing plate 22 and the magnetic heald 11.

The magnetic head 11, which is in contact with the disk 1 with an appropriate contact pressure, records or reproduces image information and the like supplied via an electric circuit (not shown). In addition, as the stellar pink motor 9 rotates in synchronization with the rotation of the disk 1, the magnetic head 11 moves together with the head holding plate 4 at a predetermined pitch in the disk radial direction. Information is recorded or reproduced one after another.

Next, in the standby state, the solenoid 200 is de-energized. Then, the movable body 12 is moved by the tension spring 1
Due to the tensile force of 6, the protrusion 23 of the IJJ moving body 12 rotates to the position where it contacts the stopper 17 (=J force is exerted. As a result, the desk 1 and the magnetic head 11 no longer come into contact with each other.Instead, the protrusion 23 of the movable body 12 comes into contact with the disk 1, and the disk 1 moves forward slightly toward the disk side. 1 is a stabilizing plate 22 and a protrusion 23 of the movable body 12
It is sandwiched between and continues to rotate stably.

According to this device, in the standby state, the disk 1 and the magnetic head 11 do not come into contact with each other, so that the head 11 does not wear out. Furthermore, since the disk 1 rotates while being sandwiched between the stabilizing plate 22 and the movable body 12, there is no risk of abnormal vibrations occurring in the disk 1, and stable rotation is ensured.

As a result, the abnormal vibration of disk 1 does not cause any damage, and the disk 1 d3 and magnetic head '11 are
There is no fear of causing Ilm. Furthermore, since the rotational load on the E-2 does not change much compared to that during recording and playback, it takes a long time to stabilize the rotation, which is required when transitioning from standby mode to recording and playback mode. It takes a very short time. Therefore, for example, when applying gold color with an electronic 1y camera, it is possible to immediately obtain the closest shadow without missing a photo opportunity. Also, the height of the stopper 17 is set to t4.
1 screw 18, the magnetic head 1 of the protrusion 23 when the movable body 12 returns to the non-recording/reproducing state as shown in FIG. 3 due to the action of the tension spring 16.
The protrusion amount of one piece can be set to an appropriate state.

Also, only the movable body 12 moves in the direction perpendicular to the recording surface of the disk 1, and the stable part 22. Since both the magnetic heads 11 are fixed, there is no fear that the relative positional relationship between the magnetic head 11 and the stabilizer 22 with respect to the disk 1 will be disrupted, and the structure is simple and can be manufactured at low cost.

Next, other embodiments of the present invention will be described. Figure 4 (during recording/playback) and Figure 5 (during non-recording/playback) are shown in Figure 2J.
FIG. 4 is a diagram showing a second embodiment of the present invention corresponding to FIGS. 3 and 3; As shown in FIG. 4 and FIG. 15, in this embodiment, dust etc. on the disk 1 can be removed in the standby state by implanting a brush 24 on the disk 1 of the movable body 12. It was made by sea urchin. Therefore, there is an advantage that information can be recorded and reproduced stably without any problems in recording and reproduction operations due to bulges and the like.

In addition, instead of the brush 24 mentioned above, use felt etc.
A similar effect can be achieved by reducing =l.

Since the points other than the above are the same as those of the first embodiment, the explanation will be omitted.

6 and 7 are diagrams showing a third embodiment of the present invention, FIG. 6 is a schematic plan view, and FIG. 7 is a partial view seen from the direction of arrow B in FIG. 6. .

This embodiment differs from the first embodiment in that rotating rollers 25 and 26 are attached instead of the protrusion 23 of the movable body 12. If you do this, the disc 1 and each roller 25.2 (3) will not slide, so you can avoid scratches on the disc 1 (
=J is not injured, and the load on the motor 2 can be reduced in the standby state.

Note that the present invention is not limited to the above-mentioned eggplant examples. For example, in the embodiment described above, metal is used as the material for forming the movable body 12, but it is also possible to reduce friction with the disk 1 by using a self-cleaning material 131 made of amorphous carbon or the like. . Also, solenoid 2
By using a self-holding solenoid using a permanent magnet as the zero, power for excitation of the solenoid is not required even during recording and reproduction, thereby saving power. In addition to this, it is of course possible to carry out various modifications without changing the gist of the present invention.

〔Effect of the invention〕

According to the present invention, a stabilizing plate is provided to give stable rotation to a disc-shaped recording medium that is rotationally driven and driven by a motor. , a magnetic head for recording and reproducing is placed on a disc-shaped recording medium, a movable body is provided around the magnetic head, and during recording and reproduction, the movable body is moved back to bring the magnetic head into contact with the disk, and when not recording and reproducing, the magnetic head is brought into contact with the disk. By avoiding moving the movable body forward, the magnetic head is kept away from the disk. In the C1 standby state, at least wear of the magnetic head can be prevented, and the stabilizing plate
The relative positional accuracy of the disk and the laminated head can be kept sufficiently stable, and furthermore, a magnetic recording and reproducing device with a simple configuration and low cyst can be provided.

[Brief explanation of the drawing]

Figures 1 to 3 are diagrams showing the first embodiment of the present invention, where Figure M1 is a schematic plan view and Figure 2 shows the state during recording and reproduction as seen from the direction of the arrow in Figure 1. 3 is a partial view showing the state during non-recording and reproduction viewed from the same direction, and FIGS. 4 and 5 are shown in correspondence with FIGS. 2 and 3." FIG. 6 and FIG. 7 are diagrams showing a third embodiment of the present invention, FIG. 6 is a schematic plan view, and FIG. 7 is a view taken from the direction of arrow B in FIG. 6. It is a partial view as seen. 1... Disk, 2... Disk drive motor, 4...
...Head holding plate, 11...Magnetic head, 12...
Movable body, 13.14... Angle, 15... Support shaft,
16... tension spring, 17... stopper, 19...
・Bottle, 20... Solenoid, 22... Stabilizer, 2
4...Brush, 25°26...Roller. Applicant's agent Patent attorney Jun Tsubozuki

Claims (1)

[Claims] A flexible disc-shaped recording medium, a motor that rotationally drives the disc-shaped recording medium, and a motor that stabilizes the rotation of the disc-shaped recording medium driven one rotation by the motor. a magnetic head which records and reproduces information on the disc-shaped recording medium, and which is arranged to face the disc-shaped recording medium across the disc-shaped recording medium, such as a stabilizer plate in contact with the disc-shaped recording medium;
A movable body is provided around the magnetic head, and the movable body is moved toward the disc-shaped recording medium from the tip of the magnetic head during non-recording and reproduction, and the magnetic l\\ during recording and reproduction.
1. A magnetic recording and reproducing device characterized by comprising a movable body moving means for retreating from the tip of the rad.