JPS63205865A - Magnetic head operating device for still video camera - Google Patents

Abstract

PURPOSE:To eliminate an abutting state after the completion of a recording by making a head position changing mechanism operate so that is shifts a magnetic head toward an abutting side at first, and when set time elapses, it detaches the head, when the magnetic head is detached from abutting with the recording surface of a magnetic disk, by using the head position changing mechanism. CONSTITUTION:By depressing a release button 34, a switch 35 is made closed, and a state signal is inputted to the pulse generating part 33A of a microcomputer 33, and the generated one shot pulse is transmitted to the positive pulse generating part 32A of a driving circuit 32 through a gate 33C. Next, the positive pulse from it is given to a solenoid 27, and the magnetic head is allowed to about with the recording surface of the magnetic disk, and when the recording is completed, the switch 35 is opened, and this state signal is inputted to the timer part 33B of the computer 33. Afterwards, a time-up signal from it is inputted to the pulse generating part 33A, and the generated one shot pulse is transmitted to a negative pulse generating part 32B, and the negative pulse from it is impressed to the solenoid 27 so that it operates a reverse operation, and the head is detached from the recording surface.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a magnetic disk recording surface of a magnetic head for recording, erasing, and reproducing images in a still video camera that records still images on a magnetic disk. Contact with
This invention relates to technology for controlling separation to reduce damage and deformation of magnetic disks.

More specifically, the present invention relates to a magnetic head operating device for a still video camera, which is provided with a head position changing mechanism for bringing the magnetic head into contact with and away from the recording surface of a magnetic disk, and is provided with operating means for the head position changing mechanism.

[Conventional technology]

In the magnetic head operating device described above, conventionally, in order to protect the magnetic disk, the magnetic head is moved to the next track along the radial direction of the magnetic disk after recording of an image signal to the trunk where the magnetic disk is located is completed. There is a known structure in which the magnetic head is separated from the recording surface of the magnetic disk by operating a head position changing means while the magnetic head is in contact with the magnetic disk, thereby shortening the contact time of the magnetic head with the magnetic disk (for example, (See Japanese Patent Application Laid-Open No. 61-81093).

[Problem that the invention seeks to solve]

However, in the above-mentioned conventional magnetic head operating device,
There were the following problems.

In other words, in order to reduce the contact time of the magnetic head against the magnetic disk and prevent deformation or damage to the magnetic disk,
In this case, it is preferable to keep the magnetic head separated from the recording surface of the magnetic disk until just before recording. However, in order to perform recording quickly and reliably, taking into consideration that it takes some time for the magnetic head to come into contact with the recording surface of the magnetic disk until its operation is performed stably, The magnetic head is often brought into contact with the recording surface of the magnetic disk a little earlier than the recording operation by the magnetic head is performed.

On the other hand, in recent years, with the automation of cameras, automatic exposure control and automatic focus adjustment functions are increasingly being incorporated into still video cameras. The operation must be performed prior to the shutter release operation.

Therefore, for example, by touching the release button with your finger, you can start photometry for automatic exposure control and distance measurement for automatic focus adjustment, and also activate the head position change mechanism to move the magnetic head to record on the magnetic disk. The above-described exposure control operation and focus adjustment operation are often performed while the magnetic head is in contact with the recording surface of the magnetic disk.

However, when taking a picture using a camera that has such an automatic exposure control function or automatic focus adjustment mechanism, the shutter opportunity is not immediately available after completing exposure control and focus adjustment so that the shutter can be released immediately. or waiting for
Furthermore, even after waiting for a while in this way, an appropriate shutter opportunity may not be obtained and the photographing operation may be interrupted.

Therefore, in such a case, even though the magnetic head does not record image signals, the magnetic head remains in contact with the recording surface of the magnetic disk for a long time, causing the recording surface of the magnetic disk to Deformations such as dents were likely to occur.

In view of the above circumstances, an object of the present invention is to reduce deformation of a magnetic disk when no recording is performed for a long time.

[Means for solving problems]

The characteristic configuration of the still video camera according to the present invention is that a set time has elapsed after the operation means for the head position changing mechanism that brings the magnetic head into contact with and separates it from the recording surface of the magnetic disk is operated to the side that brings the magnetic head into contact. In this case, a head separation control means is provided for operating the head position changing mechanism so that the magnetic head separates from the magnetic head.

[For production]

In other words, after the magnetic head comes into contact with the recording surface of the magnetic disk, it is separated from the recording surface of the magnetic disk after a set time has elapsed. If the configuration is such that the magnetic head comes into contact with the magnetic disk at the same time as the start of the distance measurement operation, the release operation may not be performed for a long time after the photometering operation or distance measurement operation is completed, or the ↑ Even if the operation is interrupted, the magnetic head will not remain in contact with the recording surface of the magnetic disk for a long time.

On the other hand, if the release operation is performed within the set time after the magnetic head contacts the recording surface of the magnetic disk, the magnetic head will remain in contact with the recording surface of the magnetic disk, so the magnetic head will quickly and The recording operation on the magnetic disk is reliably performed. After the recording is completed, the magnetic head is separated after a set period of time has elapsed from when the magnetic head came into contact with it, so even after recording is completed, the magnetic head may occasionally remain in contact with the recording surface of the magnetic disk for a long time. There isn't.

〔Example〕

Hereinafter, the present invention will be described in detail based on the drawings.

As shown in Figure 2, a silver halide camera body (2) equipped with a darkest lens (1) is equipped with a still video I darkest lens instead of its original back cover (not shown). A still video camera is constructed by detachably attaching a still video bag (3).

This still video bag (3) has a photographic lens (1)
A relay optical system (5) that reduces and projects an image formed on a position corresponding to the film surface of a silver halide camera body (2) onto a CCD (4), and an image projected onto a COD (4). A magnetic recording device (R) and the like for recording on the magnetic disk (6) are provided.

The magnetic disk (6) is disk-shaped, and as shown in FIG. 3, is housed in a magnetic disk jacket (J).
This magnetic disk jacket (J) is configured to be able to be inserted into and removed from the above-mentioned magnetic recording device (R).

This magnetic recording device (R) consists of a plywood (7) fixed to a still video bank (3), a shaft core (
×1) The upper cover (8) is attached to the plywood (7) in a rotatable state around A magnetic disk jacket is attached to the stand Fi (8) so that it can rotate freely around it.
- (J) It has a disc holder (9) for holding.

And the disc holder (9) is attached to the plywood (7),
Further, the upper lid (8) is biased to rotate counterclockwise in the figure by springs (not shown), respectively, with respect to the disc holder (9), and when the upper M (8) is in the open state, It is configured to be held in a position.

On the top of the plywood (7) is a magnetic disk jacket (J).
With the magnetic disk (6) loaded, the center core part (6A) of the magnetic disk (6) is attracted by magnetic force and the magnetic disk (6
) for rotating a magnet material motor (10), and
A positioning bin (11) is attached to position the magnetic disk jacket (J) in a loaded state.

A guide shaft (work 2) is attached to this plywood (7), and a head that supports a magnetic head (13) for recording image signals on a magnetic disk (6) is attached to this guide shaft (12). A carriage (14) is slidably fitted onto the outside. Then, by sliding the head carriage (14) along the guide shaft (12), the magnetic head (13)
) can be moved along the radial direction of the magnetic disk (6).

On the back side of this plywood (7), as shown in FIG. A spring (15) is installed to bias the head (13) toward the end of movement (direction A in FIGS. 3 and 4). Further, a head feeding mechanism is provided to step feed the head carriage (14) along the guide shaft (12).

This head feeding mechanism abuts a cam follower section connected to the head carriage (14), and the head carriage (14)
This step cam (16) positions the step cam (14).
A ratchet (17) that rotates integrally with the ratchet (17), a click lever (18) that engages and disengages the teeth of this ratchet (17) to fix the rotational position of the ratchet (17), a solenoid (19) for driving the head feed, and this solenoid. (19) A ratchet feed pawl (20) that engages and disengages from the teeth of the ratchet (F) and feeds the ratchet (F) one tooth at a time, and a linking lever that connects the ratchet feed pawl (20) and the solenoid (19). (21) etc.

On the other hand, as shown in Fig. 3, a pair of protrusions (8a) formed on a part of the upper lid (8) are engaged with the upper surface of the base plate (7) to move the upper M (8) to the closed position. A pair of locking parts (
A locking member (22) in which 22a) and (22b) are connected by a connecting shaft (22c) parallel to the guide shaft (12),
It is rotatably supported around the axis (x2).

Further, a locking member (22) is attached to one end of the guide shaft (12) so that its pair of locking portions (22a) and (22b) are in the unlocked position as shown in the figure when the top cover (8) is open. When the upper M (8) closes, the protrusion (8b) of the upper lid (8) comes into contact with it, changing the posture of the locking member (22) to change the posture of the locking member (22) to the pair of locking portions ( 22a),
A locking member (23) that changes the locking position (22b) to the locking position is attached to one of the locking parts (22a) in a linked manner.

A locking member (
22), one of the locking parts (22a) is manually operated to rotate the locking member (22) clockwise in the figure, and the pair of locking parts (22a) and (22b) are rotated clockwise in the figure. ) is formed to release the upper cover (8) from being held in the closed position and to change the posture of the locking member (23) so as to hold the locking member (22) in that posture. has been done.

Furthermore, the top lid (8) has a magnetic disk jacket (
The pad (24) and the magnetic disk (6) abut against the back surface of the magnetic disk (6) to which the magnetic head (13) is abutted when the magnetic head (13) is loaded and receive the magnetic head (13). ) for forcibly inserting the center core part (6A) into the spindle part of the motor (10) for interlocking connection, and monitoring the rotation of the magnetic disk (6) according to the rotation speed. A pulse generator coil (26) and the like are attached to output the generated pulses to a servo circuit (not shown) for rotation control.

On the other hand, as shown in FIGS. 4 to 6, a magnetic head (
A head position that brings the magnetic head (13) into contact with and separates from the recording surface (6a) of the magnetic disk (6) is on the lower surface of the plywood (7) facing one end of the head carriage (14) that holds the magnetic head (13). A change mechanism (IC) is provided.

This head position changing mechanism ()Ic) consists of a bistable solenoid (27) in which a movable core (27a) is stably supported in two positions shown by a solid line and a two-dot chain line in FIG. A pair of links (28a) connected to (27a)
), (28b), and a head carriage (1) connected to this link mechanism (28).
4) from below in FIG. 6 to rotate the head carriage (14) around the guide shaft (12).

The head carriage (14) is mounted on the spring (
The biasing force of the spring (15) biases the magnetic head (13) downward in FIG. 6, that is, toward the end of the movement of the magnetic head (13). (14), it is urged to rotate counterclockwise around the guide shaft (12) in FIG. 6.

Then, the head carriage (14) is positioned by the positioning pin (30) attached to the head carriage (14) coming into contact with the guide plate (31), and in this state, as shown in FIG. The magnetic head (13) is configured to come into contact with the recording surface (6a) of the magnetic disk (6) to record and reproduce images.

The aforementioned contact member (29) has its shaft portion (29a) supported pivotally between a pair of boss portions (7a) and (7b) fixed to plywood. Then, this contact member (29
) is formed to be long in the vertical direction in FIG. 5 so that it can always come into contact with the end portion (14A) of the head carriage (14) that moves up and down.

As already mentioned, FIGS. 5 and 6 show the magnetic head (
13) shows the state in which recording and reproduction are performed on the recording surface (6a) of the magnetic disk (6).

In this state, a control signal is given to the solenoid (27) from a control circuit to be described later, and the movable iron core (27a) is moved to the fifth position.
When moved to the position indicated by the two-dot chain line in the figure, both the first link (28a) and the second link (28b) are moved in the direction of the arrow in the figure.

The contact member (29) is rotated counterclockwise in FIG. 6 around the shaft portion (29a), and contacts and presses one end of the head carriage (14).

As a result, the head carriage (14) moves towards the guide shaft (
12) in the clockwise direction in FIG. 6, and the magnetic head (13) touches the recording surface (6a
). The magnetic force of the solenoid (27) is set to be thicker than the biasing force of the spring (15), and the head carriage (14) is configured to be stably held in that position.

In addition, in this state, the solenoid (2
7) and the movable iron core (27a) returns to the position shown by the solid line in FIG. is moved in the opposite direction. 8. The contact member (29) is rotated clockwise in FIG. 6 around the shaft portion (29a), and the one end (1
Return to the original position away from 4A).

As a result, the head carriage (14) is rotated counterclockwise in FIG. 6 around the guide shaft (12) by the biasing force of the spring (15), and the positioning pin (30)
is held in a position in which it contacts the guide plate (31), and the magnetic head (13) again contacts the recording surface (6a) of the magnetic disk (6).

Next, by controlling the operation of the solenoid (27) described above, the recording surface (6a) of the magnetic disk (6) of the magnetic head (13) is
A control device (CM) that performs contact and separation from the object will be explained.

As shown in FIG. 1, this control device (b) includes a drive circuit (32) for the solenoid (27) and a microcomputer (33) that controls the operation of this drive circuit (32).
).

The drive circuit (32) has a positive pulse generating section (32A) and a negative pulse generating section (32B). Then, the movable core (27a) of the solenoid (27) is moved to the position shown by the solid line in FIG. 5 by the positive pulse output from the positive pulse generator (32A), and the magnetic head (13) 6) is configured to come into contact with the recording surface (6a). Further, the movable core (27a) of the solenoid (27) is moved to the position shown by the two-dot chain line in FIG. 5 by the negative pulse output from the negative pulse generator (32B), and the magnetic head (13) is Disc (6)
The recording surface (6a) is configured to be spaced apart from the recording surface (6a).

The microcomputer (33) has a release button (
The recording switch (34) is closed in conjunction with the pressing operation of
35) is connected, and the state signal of this recording switch (35) is configured to be input to the pulse generator (33A) and timer section (33B) of the microcomputer (33). And the pulse generator (33A)
The pulse signal output from the positive pulse generating section (32A) of the drive circuit (32) is passed through a gate (33C) that switches the output port according to the state of the timer section (33B).
Alternatively, it is configured to be output to either the negative pulse generating section (32B).

Next, the operation of this control device (CM) will be explained with reference to the time chart of FIG.

When the release button (34) is pressed and the recording switch (35) is closed <t=tI>, in this state k (No. 8 is the pulse generator (33) of the microcomputer (33)
A). As a result, the pulse generator (33A
), a one-shot pulse is generated from the gate (33C
) to the positive pulse generator (32A) of the drive circuit (32).
) is output.

The positive pulse generator (32A) receives this one-shot pulse and outputs a positive pulse to the solenoid (27). As a result, as already mentioned, the magnetic head (13)
comes into contact with the recording surface (6a) of the magnetic disk (6).

Further, when a state signal indicating that the recording switch (35) is closed is input to the microcomputer (33), a motor drive unit (not shown) drives the motor (10) to drive and rotate the magnetic disk (6). Outputs a control signal to start the

After the rotation of the motor (10) becomes stable <t=tz>, the magnetic head (13) starts recording an image on the magnetic disk (6), and when the recording is completed, the recording switch (35
) is opened <t-t*).

On the other hand, the state signal when the recording switch (35) is closed is as follows.
It is also input to the timer section (33B) of the microcomputer (33) and starts the timer in this timer section (33B). This timer is configured to time out when a set time normally required to complete recording on the magnetic disk (6) has elapsed since the recording switch (35) was closed.

When this timer times up (1=11>, the control signal from the timer section (33B) causes the pulse generation section (33B) to
A one-shot pulse is generated from 3A). In addition, the output port selected by the gate l (33C) is switched by the control signal from the timer (33B), and the one-shot pulse from the pulse generator (33A) is generated by the drive circuit (33B).
2) is output to the negative pulse generator (32B).

The negative pulse generator (32B) receives this one-shot pulse and outputs a negative pulse to the solenoid (27). As a result, as already mentioned, the magnetic head (13)
is separated from the recording surface (6a) of the magnetic disk (6).

Also, the timer section (33) of the microcomputer (33)
When the timer B) times up, the motor drive section outputs a control signal to stop the rotation of the motor (10).

As described above, the recording switch (35) is closed and the magnetic head (13) is moved to the recording surface (6a) of the magnetic disk (6).
By separating the magnetic head (13) after a set time has elapsed after the magnetic head (13) starts moving so as to come into contact with the recording surface (6a) of the magnetic disk (6), This protects the magnetic disk (6) from remaining in contact with the magnetic disk (6).

That is, the recording switch (35) is connected to the head position changing mechanism (H
A control device (CM) comprising a microcomputer (33) and a drive circuit (32), which is an operating means (HM) for C), is located on the side where the operating means (1 group) contacts the magnetic head (13). After being activated, the head separation control means operates the head position changing mechanism (HC) so that the magnetic head (13) separates when a set time has elapsed.

The specific configuration of this head separation control means (CM) can be changed as appropriate, and several examples will be listed below.

<1> After the operating means (IIM) is operated to bring the magnetic head (13) into contact, the head position changing mechanism (HC
) is activated and the magnetic head (13) is separated from the magnetic head (13) in conjunction with switching between the field recording state and the frame recording state on the magnetic disk (6), and is made longer in the frame recording state.

2> A single image recording state in which the set time is recorded one screen at a time by pressing the release button (34);
In conjunction with switching to a continuous recording state in which recording continues while the release button (34) is pressed, the continuous recording state is made longer.

In addition, in the previous embodiment, the recording head (35), which is the operation means (IIM), is closed by pressing the release button (34), and this causes the magnetic head (13) to close.
In the above description, the operation of bringing the magnetic head (13) into contact with the recording surface (6a) of the magnetic disk (6) is started, but the timing of the start of the contact action of the magnetic head (13) can be changed as appropriate. Next, some examples of the timing will be listed.

(3> Recording, playback, erasing, standby, cueing, and
For searching, etc., the magnetic head (13) is connected to the magnetic disk (6).
When an operation tool such as an operation key or operation button is operated to perform an operation that requires access to the recording surface (6a) of the device, or when a switch or the like is operated accordingly.

(4) When the magnetic disk jacket I-(J) is loaded in a configuration in which cueing is performed at the same time as the magnetic disk jacket (J) is loaded into the camera.

5> When the magnetic head (13) is moved along the radial direction of the magnetic disk (6) by the head feeding mechanism and transferred between trunks.

6> When the power is turned on in a configuration that automatically cues when the power is turned on with the magnetic disk jacket (J) loaded in the camera.

7> When your finger touches the release button (34),
Or when a photometry switch etc. is activated accordingly.

(8) When the pressing operation tool of the release button (34) reaches a predetermined amount less than the operation image until the release switch (not shown) is closed, or when the photometry switch etc. is activated accordingly.

9> When the release switch is closed.

<10> When mirror amplifier is started or completed.

11> When the aperture operation starts or ends.

<12> When the smear removal operation of the image sensor is started or completed.

That is, by each of the above-mentioned operations, for example, in the configuration of the previous embodiment, the solenoid (27) is actuated to move the magnetic head (13) in the direction of contacting the recording surface (6a) of the magnetic disk (6). Microcomputer to make it (33)
The means for inputting the activation signal to the controller is the operating means (HM).

Furthermore, in addition to the configuration of the previous embodiment, a magnetic head (13
) from the magnetic disk (6) recording surface (6a),
It may be configured to be performed in an interruptive manner. Next, examples are listed.

<13> When recording ends.

<14> When an eject operation is performed on the magnetic disk jacket (J).

<15> When the power is turned off.

The specific configuration of the head position changing mechanism (Hc) can also be changed as appropriate, and an example thereof will be described.

In the embodiment shown in FIGS. 8 and 9, instead of the bistable solenoid (27) used in the previous embodiment,
A monostable solenoid (36) is provided. This solenoid (36) has a permanent magnet (36A) and a pair of electromagnets (36B) and (36C).

In the state shown in Fig. 8, the electromagnets (36B), (36
C) is not energized, the biasing force of the spring (15) exceeds the magnetic force of the permanent magnet (36A), and the head carriage (14) is in the attitude shown in FIG. At this time,
The magnetic head (13) is attached to the recording surface (6) of the magnetic disk (6).
It is in contact with a).

In this state, electromagnet C36B near the permanent magnet (36A)
) by applying a negative pulse only to the permanent magnet (
36A) and this electromagnet (36B) exceeds the urging force of the spring (15), and the movable iron core (36a)
is rotated toward the permanent magnet (36A).

As a result, the head carriage (14) moves towards the guide shaft (1).
2), and the magnetic head (13) is separated from the recording surface (6a) of the magnetic disk (6).

When the movable iron core (36a) reaches the vicinity of the permanent magnet (36A), the magnetic force of the permanent magnet (36^) causes the spring (15)
Even if a negative pulse is not applied, the posture of the movable core (36a) is maintained, and the magnetic head (13) is separated from the recording surface (6a) of the magnetic disk (6). maintained in condition.

On the other hand, in order to bring the magnetic head (13) into contact with the recording surface (6a) of the magnetic disk (6) again, two electromagnets (
A positive pulse may be applied to both 36B) and (36C). As a result, the force obtained by adding the biasing force of the spring (15) and the magnetic force of the electromagnet (36G) exceeds the force obtained by canceling the magnetic force of the permanent magnet (36A) and the magnetic force of the electromagnet (36B), so the movable iron core (36a) returns to the state shown in FIG.

In this embodiment, the configuration and operation of other parts are the same as those in the previous embodiment, so the same numbers are given, and detailed explanations are omitted.

Further, in the configuration shown in FIGS. 8 and 9, it is also possible to operate as follows.

In the state shown in FIG. 8, the solenoid (36) is energized, and the force added to the magnetic force of the electromagnets (36B) and (36C) and the biasing force of the spring (15) is applied to the permanent magnet (36).
A), the head carriage (14)
It is in the position shown in the figure. At this time, the magnetic head (13) is in contact with the recording surface (6a) of the magnetic disk (6).

In this state, when the solenoid (36) is de-energized, the magnetic force of the permanent magnet (36A) exceeds the biasing force of the spring (15), and the movable iron core (36a)
It is rotated to the A) side.

As a result, the head carriage (14) moves towards the guide shaft (1).
2) The magnetic head (13) moves clockwise around the magnetic disk (6), and the magnetic head (13) separates from the recording surface (6a) of the magnetic disk (6).

That is, the solenoid (
36).

This configuration has the disadvantage that current consumption increases because it is necessary to continue energization from the start to the end of contact, but there is no need to generate negative pulses.

In addition, even if the power is suddenly cut off while the magnetic throat (13) is in contact with the recording surface (6a) of the magnetic disk (6),
Since the magnetic head (13) is separated from the magnetic disk (6), it has a so-called fail-safe configuration.

Although not shown, in the previous embodiment, when the magnetic head (13) separates from the recording surface (6a) of the magnetic disk (6) after the set time has elapsed, this is indicated in the viewfinder, for example. It would be more useful if the image was displayed in the image so that the photographer would be able to recognize it.

Furthermore, in the previous embodiment, a still video adapter (3) was attached to the silver halide camera body (2) in place of the back cover of the camera to enable still video shooting. Of course, this can also be applied to a still video camera that can perform still video recording by itself.

〔Effect of the invention〕

As described above, the magnetic head operating device for a still video camera according to the present invention is capable of separating the magnetic head from the recording surface of the magnetic disk after a predetermined period of time from when the magnetic head contacts the recording surface of the magnetic disk. It is designed to prevent the magnetic head from remaining in contact with the magnetic disk when no recording is performed for a long time, eliminating the need for a magnetic head. This makes it possible to reduce the amount of time the magnetic head is in contact with the magnetic disk, and to reduce deformation such as dents caused by the magnetic head being in contact with the recording surface of the magnetic disk for a long time.

As a result, the occurrence of dropouts due to deformation of the magnetic disk can be reduced, and as the durability of the magnetic disk has improved, it has become easier to perform good recording and reproduction over a long period of time using this magnetic disk.

[Brief explanation of the drawing]

1 to 7 show an embodiment of the magnetic head operating device for a still video camera according to the present invention, FIG. 1 is a schematic diagram of the control device, FIG. 2 is a schematic sectional view of the still video camera, and FIG. The figure is a perspective view of the magnetic recording device from above, FIG. 4 is a perspective view of the magnetic recording device from below, FIG. 5 is a plan view of the head position changing mechanism, and FIG. 6 is the line ■-■ in FIG. The arrow view and FIG. 7 are time charts of the recording operation. 8th
9 and 9 show another embodiment, FIG. 8 is a plan view corresponding to FIG. 5, and FIG. 9 is a view taken along the line IX--IX in FIG. 8. , (6)...magnetic disk, (6a)...
... Recording surface, (13) ... Magnetic head, (34
)...Release button, (HC)...
Head position changing mechanism, ()IM)... Operating means, (CM)... Head separation control means.

Claims (1)

[Claims] 1. A magnetic head for a still video camera, which is provided with a head position changing mechanism that brings the magnetic head into contact with and separates from the recording surface of a magnetic disk, and is provided with operating means for this head position changing mechanism. The operating device is provided with head separation control means for operating the head position changing mechanism so that the magnetic head is separated when a set time has elapsed after the operating means was operated to bring the magnetic head into contact. A magnetic head operating device for a still video camera. 2. The magnetic head operating device for a still video camera according to claim 1, wherein the operating means starts the operation toward the side where the magnetic head is brought into contact by pressing a release button. 3. The magnetism of the still video camera according to claim 1, wherein the operating means starts operating the magnetic head in a direction toward which the magnetic head comes into contact when the magnetic disk is loaded into the camera. Head operating device. 4. Claim 1, wherein the operating means starts an operation toward the side where the magnetic head is brought into contact by transferring the magnetic head between tracks of the magnetic disk.
A magnetic head operating device for a still video camera as described in 2. 5. The magnetic head operating device for a still video camera according to claim 1, wherein the operating means starts operating toward the side where the magnetic head is brought into contact when power is turned on. 6. The head separation control means according to any one of claims 1 to 5, wherein the head separation control means is configured to increase the setting time in conjunction with switching between a field recording state and a frame recording state, the longer the setting time is in the frame recording state. A magnetic head operating device for a still video camera according to any one of the above. 7. Claim 1, wherein the head separation control means is configured to increase the set time in the continuous recording state in conjunction with switching between the single image recording state and the continuous recording state.
6. A magnetic head operating device for a still video camera according to any one of items 5 to 6.