JPS59142723A - Cleaning device for recording or reproducing head - Google Patents

Abstract

PURPOSE:To evade the wear of a recording or reproducing head as much as possible and to clean the head efficiently by providing a means which puts a time limiting device in operation only when a member provided with a cleaning member is loaded. CONSTITUTION:When the cassette 1' incorporating the dedicated cleaning sheet is loaded, a switch S is held off by the presence of its notch 1'c and the time limiting device 9 is set in an operation state. When a power source SM is turned on in said state, a control circuit 10 rotates a motor 2, but the output of a comparing circuit CP is inverted to a low level after a specific time (t) determined by the time constant depending upon the resistance R1 and capacitor C1 of a time constant circuit and the uninverted input potential of the comparing circuit CP, so the control circuit 10 stops the rotation of the motor 2.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The invention of this application relates to a cleaning device for a recording or reproducing head in a recording or reproducing apparatus using a rotating recording medium. The challenge is to find a way to clean the head frequently.

Prior Art In an apparatus that records or reproduces information using a recording medium such as a rotating magnetic sheet, recording or reproduction may occur if the area of the recording or reproducing head (hereinafter referred to as head) facing the recording medium is dirty with dirt or dust. Reproduction characteristics deteriorate. Therefore, in order to remove such dirt, a method has been adopted in which, for example, the surface of the head is cleaned with a solvent.

However, since the head of a video signal recording or reproducing apparatus is constructed with extremely precision, the above-mentioned cleaning method is likely to cause an accident that damages the head. Furthermore, in rotary magnetic sheet recorders and the like, the head is installed in many places that are difficult to reach, so it is often difficult to apply the above method.

Therefore, a method is used in which a so-called cleaning sheet or the like to which a cleaning wrap material is attached is loaded and the head is moved by running the cleaning sheet or the like in the same manner as during normal recording or reproduction.

By the way, since the cleaning wrap material has extremely high friction against the head compared to a normal recording medium, there is a possibility that the head will be easily worn out if the above-mentioned cleaning method is performed for a long time. Therefore, when using the above-mentioned cleaning method, it is necessary to keep the time for opposing rotation of the recording or reproducing head and the member provided with the cleaning material to the minimum necessary range.

Purpose of the Invention Therefore, the first invention of this application is to clean the recording or reproducing head by arranging the recording or reproducing head to face a member provided with a cleaning material and rotating the member provided with the cleaning material. A cleaning device for a recording or reproducing head configured to keep the rotational movement to the minimum necessary time in order to efficiently clean the head while avoiding wear on the head as much as possible. The purpose is to provide

A second invention, which achieves the object of the first invention, includes a record or a record for identifying that a member provided with cleaning material has been loaded and thereby setting the device in a timed operation mode. An object of the present invention is to provide a cleaning device for a playback head.

Structure of the Invention The first invention of this application is a method for cleaning the recording or reproducing head by arranging the recording or reproducing head to face a member provided with a cleaning material and rotating the member provided with the cleaning material. In the recording or reproducing apparatus configured, a timer device (in a specific example described later, for example, timer device 9 in FIG. 2) that stops the rotation of the member provided with the cleaning material at a predetermined time during cleaning; The recording or reproducing head cleaning device is characterized by:

In addition to the above features, the second invention also includes means for setting the timer to an operating state only when the member provided with the cleaning material is loaded (also the cassette 1 or 1' in FIG. 1).
It is characterized by comprising a switch S2) shown in FIG. 2 which is activated when either one of the two is loaded.

In the above, the member provided with the cleaning material refers to a cleaning sheet or a cleaning disk provided with the cleaning material on almost the entire surface, or a recording medium provided with the cleaning material at a position away from the area where recording tracks are to be formed. A recording or reproducing head refers to a recording or reproducing head such as a magnetic head, an optical head, or a capacitive head, and a recording medium refers to a recording or reproducing head such as a magnetic head, an optical head, or a capacitive head. It refers to a recording medium on which information is recorded or reproduced, and its form may be either sheet-like or disk-like, and the recording tracks formed on the recording medium may be either concentric or spiral.

Moreover, the citation of specific examples described later in the above does not limit the scope of the invention of this application in any way, and the invention of this application can be modified as appropriate within the scope of the claims.

With reference to the drawings, the configuration of the cassette applied to the invention of this application, a first embodiment of the invention of this application, a modification of the first embodiment, a second embodiment of the invention of this application, and The order of loading and unloading a cassette and detecting a notch will be explained in detail.

The following explanation assumes that the recording or reproducing head is a magnetic head,
An example in which the recording medium is a rotating magnetic sheet will be described.

Configuration of a cassette applied to the invention of this application (Fig. 1) In order to embody the invention of this application, the member provided with the cleaning material described above is built into the cassette, and the cassette and the cleaning material are provided. a cassette containing a recording medium which has not been loaded, by an identification means provided on one of them, and when the former is loaded, sets a timer device to be described in detail later into operation, thereby It is possible to stop the rotation of the member provided with the cleaning material at a predetermined time during cleaning. Note that for recording media in which the cleaning material is provided at a position away from the part where the recording track is to be formed among the members on which the cleaning material is provided, a configuration in which a cleaning wrap material is attached to the outside of the recording track is possible. . Hereinafter, in this specification, a portion of the recording medium to which a cleaning wrap material is attached will be referred to as a cleaning track.

FIG. 1 shows the configuration of the above-mentioned identification means using a cassette containing sheets as an example, and FIG.
B) shows a cassette of parts provided with cleaning material.

Of course, both may be configured in reverse, but the following description will be made with respect to the illustrated example. In the same figure (A), 1 indicates a cassette containing a sheet (for example, a magnetic sheet) that is not provided with a cleaning material, and in the same figure (B), 1' is a dedicated cleaning sheet or cleaning track provided with a cleaning material. 1 shows a cassette containing a sheet (for example, a magnetic sheet) having a magnetic field.

1a and 1'a are dustproof shutters that can be opened and closed for the head insertion opening, and 1b and 1'b are track display counters. The difference between the two is that the cassette 1' that houses the sheet containing the cleaning material has a notch 1' in its housing.
The housing of the cassette 1, which houses the sheet provided with the cleaning material c and the other sheet without the cleaning material, is not provided with a notch.

Depending on the presence or absence of the above-mentioned notch 1'c in the cassette loaded into the main body of the recording or reproducing device, a cassette 1' containing a sheet provided with a cleaning material and a sheet not provided with the cleaning material may be built therein. Detection means, for example mechanical detection means, for identifying the cassette 1 are provided. This detection means will be described later. Various other modifications can be considered to the structure of the cassette for identifying both cassettes. For example, instead of the above-mentioned notch 1'c, a through hole may be provided at a predetermined position in the cassette 1' containing the sheet provided with the cleaning material, and the presence or absence of this through hole may be detected with a photocoupler. Alternatively, a magnetic material may be attached to a predetermined position on the cassette 1' containing the sheet provided with the cleaning material, and the presence or absence of the magnetic material may be detected by a magnetic sensing element. Through each of these means, conversely to the above, a cassette containing a sheet without cleaning material is
Identification means such as a notch, a through hole, or a magnetic material may be provided.

First Embodiment (FIG. 2) of the invention of this application FIG.
It is identified by the presence or absence of a notch 1'c in the figure, and when the former is loaded, the rotation of the sheet is stopped after a predetermined time.

The above identification is performed by turning on and off the switch S2,
Further, the rotation of the sheet is stopped by a timer 9.

In FIG. 2, ST indicates a dedicated cleaning sheet or a recording sheet on which no cleaning material is provided, and this dedicated cleaning sheet is provided with a cleaning wrap material over almost the entire surface (back surface in the figure). 2 is a seat rotation motor; 3 is a head (magnetic head);
is fixed to the head carrier 3a. 4 is a step motor that controls the movement of the head 3 between tracks; 5 is a mechanism that converts the rotation of the step motor 4 into linear motion; the figure shows a screw; this screw is pivotally supported by the step motor 4; , are screw-fitted with the head carrier 3a. The head carrier 3a is further fitted into a guide rod (not shown) fixed to the chassis of the apparatus. 8
is a constant voltage source for the motor 2, which supplies voltage to the motor 2 via a control circuit 10 and a motor drive circuit 11 to rotate it at a predetermined speed. S2 is a switch that detects the presence or absence of the notch 1'c in the cassettes 1 and 1'.
When a cassette with ``c'', that is, cassette 1' containing a cleaning sheet, is loaded, it is kept on, and when a cassette without a notch, that is, cassette 1 containing a recording sheet without a cleaning material, is loaded. It is configured to turn on when the 9 is a specific example of a timer, which is one of the main features of the invention of this application, and includes a time constant circuit and a comparator circuit CP that operate when the switch S2 is off and remain inactive when the switch S2 is on. It consists of A connection point between a resistor R1 and a capacitor C1 connected in series with the constant voltage source 8 is connected to an inverting input of the comparator circuit CP, and a connection point between resistors R2 and R3 is connected to a non-inverting input of the comparator circuit CP. The output of CP is connected to control circuit 10. Note that the switch S2 is connected in parallel to the capacitor C1, and SM is a power switch.

When the switch S2 is on, the non-inverting input of the comparator circuit CP is connected to the resistors R2 and R3 by the operation of the power switch SM.
Since the comparator circuit CP is kept at a constant positive potential determined by , and its inverting input is kept at ground potential, the output of the comparator circuit CP is at a high level, and the control circuit 10 drives the motor 2 at a predetermined speed via the motor drive circuit 11. Rotate with . On the other hand,
When the switch S2 is off, the output of the comparator circuit CP is initially at a high level, but the capacitor C1 is charged from the constant voltage source 8 via the resistor R1, and its potential is transferred to the resistors R2 and R.
When the positive potential determined by 3 is exceeded, the comparator circuit C
The output of P changes to a low level, and the control circuit 10 operates to stop the rotation of the motor 2.

Reference numeral 12 in FIG. 2 is a speed-voltage converter that converts the rotational speed of the motor 2 into voltage, and includes a control circuit 10 and a motor drive circuit 11.
Together, they constitute a servo system that controls the rotational speed of the motor 2. 13 is a step motor drive circuit.

Next, to explain the operation of the device shown in Fig. 2, when the cassette 1' containing a dedicated cleaning sheet is loaded,
The presence of the cutout 1'c keeps the switch S2 off and sets the timer 9 into operation. When the power switch SM is operated in this state, as described above, the output of the comparator circuit CP is initially at a high level, so the control circuit 1
0 operates to rotate the motor 2, but after a predetermined time t determined by the time constant formed by the resistor R1 and capacitor C1 of the time constant circuit and the non-inverting input potential of the comparator circuit CP, the output of the comparator circuit CP becomes a low level. In turn, control circuit 10
operates to stop the rotation of motor 2. Therefore, when the cassette 1' containing a special cleaning sheet is loaded, this sheet rotates only for the above-mentioned time t, so if this time t is set to the minimum time necessary for the purpose of cleaning, the cleaning The head 3 is cleaned by the cleaning material adhered to the sheet ST (substantially the entire back surface in the figure), and wear of the head 3 due to friction with the cleaning material can be avoided as much as possible. In this case, head 3 is
The purpose of cleaning can be achieved if the sheet ST is located at a position opposite to the part where the cleaning material is provided, but the position of the head 3 is determined so that cleaning of the head 3 is performed most efficiently considering the rotational speed of the sheet ST. If the position of the head 3 during cleaning is regulated by other conditions, it is possible to select the rotational speed of the sheet ST so as to satisfy the above conditions. Note that selection of the rotation speed of the seat ST will be described later.

On the other hand, when the cassette 1 containing a recording sheet without a cleaning material is loaded, the switch S2 is kept on because the aforementioned notch does not exist, and the output of the comparison circuit CP continues as described above. The level becomes high, and the control circuit 10
controls the motor 2 to rotate at a predetermined speed. In this state, the step motor 4 is controlled by the step motor drive circuit 13 to transport the head 3 in the radial direction of the recording sheet ST via the mechanism section 5 and the head carrier 3a, whereby a signal is transmitted by the head 3 to the recording sheet ST. recorded,
Alternatively, the recorded signal is read by the head 3.

The embodiment shown in FIG. 2 is an example in which a cassette 1' containing a dedicated cleaning sheet and a cassette 1 containing a recording sheet without cleaning material are mechanically distinguished by the presence or absence of a notch 1'c. However, if the operator can identify both cassettes by the display etc. on the cassette surface, the operator may, for example, turn off switch S2 when loading cassette 1' and turn off switch S2 when loading cassette 1. If the power switch SM is turned on and then the power switch SM is operated, the timer 9 operates to stop the rotation of the motor 2 after a fixed time t in the former case, and the motor 2 can be operated in the normal recording or reproducing mode in the latter case.

Modification of the first embodiment of the invention of this application (FIG. 3) When cleaning the head 3 using the apparatus shown in FIG. If the cleaning sheet ST is rotated at 100 degrees, an air layer will be formed between the head 3 and the cleaning sheet ST, and if there is a possibility that the head 3 cannot be cleaned effectively, reduce the rotation speed of the cleaning sheet ST. is allowed.

Figure 3 shows the main parts of a specific example in which the sheet rotation motor is rotated at high speed in the recording or playback mode, and at a low speed and for a fixed period of time in the cleaning mode. The source 8 supplies a first voltage V1 for rotating the motor 2 at a high speed during recording or playback, and a second voltage V2 for rotating the motor 2 at a low speed during cleaning (V1>
V2), and the first voltage V1 is applied to the analog gate 14.
A and the second voltage V2 is connected to the analog gate 14
They are each supplied to the control circuit 10 via B. S2
' is a switch that is synchronously turned on and off in conjunction with the switch S2, and is connected to the constant voltage source 8 via a resistor R4. The potential at the connection point a between switch S2' and resistor R4 is
When the switch S2' is turned off, the level becomes high, and when it is turned on, the level becomes low. The potential at the connection point a is applied to the analog gate 14B, and its high level turns on the gate 14B. Further, the potential at the connection point a is inverted by the inverter 15 and applied to the analog gate 14A, and the high level of the output of the inverter 15, and therefore the low level of the potential at the connection point a, turns on the gate 14A.

In the above configuration, when the cassette 1' containing the dedicated cleaning sheet is loaded, the switches S2 and S2' are off, so the analog gate 14A is off and the analog gate 14B is on, and the constant voltage source 8 Since the low voltage V2 of 2 is supplied to the control circuit 10, the motor 2,
Therefore, the sheet ST (in this case, a special cleaning sheet) rotates at a low speed, and the cleaning material provided on the sheet ST can perform efficient cleaning without being hindered by the air layer mentioned above, and in addition, as in the case of FIG. Similarly, the rotation of the sheet ST is controlled to stop at a predetermined time t by the action of the timer 9. Note that the reduction in the rotation speed of the sheet ST allows, for example, the distance between the head 3 and the sheet ST, that is, the thickness of the above-mentioned air layer, to be reduced to about 1/2 of that during recording or reproduction.

On the other hand, when the cassette 1 containing recording sheets without cleaning material is loaded, the switches S2 and S2
' is on, so, contrary to the above, the analog gate 14
A is on, 14B is also off, the timer 9 is inactive, and the first high voltage V1 is applied from the constant voltage source 8 to the control circuit 10.
motor 2, and therefore sheet ST (
In this case, the recording sheet (recording sheet) rotates at high speed, and normal recording or reproduction is performed.

As a modification of the apparatus shown in FIG. 3, the polarities of the voltages V1 and V2 are reversed, for example, the first voltage V1 is made positive and the second voltage V2 is negative, and a cassette 1' containing a dedicated cleaning sheet is created. It is also possible to configure the motor 2, and therefore the sheet ST, to rotate in the opposite direction to that during recording or reproduction when loaded. During recording or reproduction, since the sheet ST always rotates in a fixed direction with respect to the head 3, dust and dirt accumulates in a fixed direction with respect to the head 3, and the upstream side of the rotation of the sheet ST Dirt accumulates near the opposing surface of the head 3, and the accumulated dirt tends to trail in the downstream direction of the rotation of the sheet ST.However, according to the above-mentioned reverse rotation operation, there is a tendency for the accumulated dirt to trail in the downstream direction of the rotation of the sheet ST. Compared to a configuration in which the sheet ST is rotated in a fixed direction, dirt can be removed more efficiently. In this case, if |V1|>|V2|, in addition to this, the same effect as described with respect to FIG. 3 is achieved.

A second embodiment (FIG. 4) of the invention of this application FIG. 4 shows that the sheet built into the cassette 1' of FIG. 1(B) has a cleaning track (indicated by Tc in FIG. 4). This cassette 1' is a recording sheet, and the cassette 1 shown in FIG. The operation of the cleaning mode in which the recording sheets are rotated facing each other is stopped at a fixed time period.

In FIG. 4, parts given the same reference numerals as in FIG. 2 basically have the same configuration and function. As for the other parts, 6A is a cassette loading/unloading signal source that generates a signal indicating the loading and unloading of the cassettes 1, 1', and a switch S1 which is activated when loading and unloading the cassettes 1, 1'. include. 6B is a notch detection signal source that identifies the presence or absence of a notch 1'c in the loaded cassettes 1, 1' and generates a signal indicating this,
It includes a switch S2 that responds to the presence or absence of a notch 1'c in the cassette 1, 1'. Signals generated by signal sources 6A and 6B are sent to system control section 7. S3 and S4 are
The position where the head 3 has advanced one track past the last track on the sheet ST and the cleaning track T, respectively.
This is a position sensor that operates as the head carrier 3a moves when the head carrier 3a reaches position c, and this detection signal is also sent to the system control unit 7.

7 is a system control unit, which includes a cassette loading and unloading signal source 6A, a cassette notch detection signal source 6B, and a sensor S.
Signals from sensor S3 and sensor S4 are input to control the operations of other parts of the device.

Note that the system control section 7 includes a timer 9' having a function equivalent to that of the timer 9 shown in FIG. A constant voltage source 8' supplies a predetermined voltage to the motor 2 via a control circuit 10 and a motor drive circuit 11.

Next, the operation of the apparatus shown in FIG. 4 will be explained. When the recording or reproducing operation progresses and the head 3 finishes recording or reproducing at the final recording track position of the sheet ST and is further advanced by a distance corresponding to the track, the sensor S3 is activated and the system controller 7
In response to this command, the motor drive circuit 11 stops the rotation of the motor 2, and the step motor drive circuit 13 also temporarily stops the operation of the step motor 4. Next, when the cassette 1 or 1' is taken out from the cassette storage section (22 in Fig. 5),
Based on the cassette loading/unloading signal generated by the cassette loading/unloading signal source 6A, the step motor drive circuit 13 drives the step motor 4 via the system control unit 7.
is rotated in the opposite direction to return the head 3 to a position corresponding to the cleaning track Tc of the sheet ST, at which point the sensor S4 is activated and the step motor 4 is stopped at that position via the system control section 7.

In this state, the sheet S having the cleaning track Tc
When a cassette 1' containing a T is loaded, a cassette loading signal generated by the cassette loading/unloading signal source 6A and a signal generated by the cassette notch detection signal source 6B are transmitted via the system control unit 7. Cleaning mode operation starts. That is, the system control unit 7 rotates the motor 2 via the control circuit 10 and controls the step motor drive circuit 13 for a predetermined time t until the output of the timer circuit 9' changes from a high level to a low level. The step motor 4 is controlled to remain inactive. Therefore, the head 3 is cleaned by the cleaning material attached to the cleaning track Tc of the rotating recording sheet ST. In this case, the head 3
While the motor 2 faces the cleaning truck ST,
Therefore, the rotational speed of the recording sheet ST may be controlled to be lower than that during recording or reproduction.

When the rotation of the motor 2 for the predetermined time t is completed, the output of the timer circuit 9' is at a low level, so the system control unit 7 causes the step motor 4 to rotate in the forward direction via the step motor drive circuit 13. As a result, the head 3 moves to a position corresponding to the first recording track of the sheet ST, and the sensor 4 becomes inactive. Note that instead of the cassette ejection signal from the signal source 6A, the head 3 may be returned to the position corresponding to the cleaning track Tc by the operation of the sensor S3 or by a signal from the signal source 6B. Further, the stopping of the motor 2 by the operation of the sensor S3 and the restarting of the motor 2 by the cassette loading signal from the signal source 6A may be performed by controlling the constant voltage source 8'.

On the other hand, when a cassette 1 containing a built-in sheet ST without a cleaning track is loaded, the system detects a The step motor drive circuit 13 rotates the step motor 4 in the forward direction via the control section 7 to move the head 3 to the first recording track position. Note that the signal source 6B may be configured to generate a signal on one side and not generate a signal on the other side in response to the loading of a sheet with a cleaning track and a sheet without a cleaning track, thereby identifying the two. good. When the sensor S4 becomes inactive due to the movement of the head 3, the control circuit 10 is controlled via the system control unit 7, and the motor drive circuit 11 rotates the motor 2 for recording or reproduction. Thereafter, in this state, the recording or reproducing switch is operated to operate the recording or reproducing circuit, and the track designation switch is operated to move the head 3 to a desired track to record a signal or reproduce the recorded signal. .

In the device shown in FIG. 4 as well, the sheet ST is
It is clear from the foregoing description that the rotation speed can be lowered than during recording or reproduction, or the rotation direction can be reversed from that during recording or reproduction.

Cassette loading and unloading and notch detection (FIG. 5) Switch S1 and cassette notch detection signal source 6 included in the cassette loading and unloading signal source 6A in FIG.
The switch S2 included in B can also be applied to the device of FIG. FIG. 5 shows an example of these switches and related devices, in which 21 is the main body of the recording or reproducing device;
Reference numeral 2 denotes a cassette storage section, 1 or 1' indicates a cassette containing the sheet ST described above, and the cassette 1 or 1' is loaded into the cassette storage section 22 in the direction of the arrow in the figure. The switch S2 is provided in a recess in the cassette storage section 22, and when the cassette 1 or 1' is loaded, depending on the presence or absence of the notch 1'c in a part of the housing, the switch S2 is disposed in a recess in the cassette storage section 22. One of the contact pieces is pressed on the lower surface to close both contact pieces, and the cassette 1' having the notch 1'c remains open. switch S
1 has contact pieces attached to the upper and lower walls of the cassette storage space 22c of the cassette storage section 22, and the cassette 1 or 1
When loaded, both contact pieces are opened, and when this is removed, both contact pieces are closed. Note that in FIG. 5, the position of the switch S1 is shown near the center of the cassette storage space 22c for the sake of simplicity;
Or, in order for the switch S1 to be activated when the S1' is completely loaded into the storage section 22, the switch is set to the fifth position.
It is possible to provide it near the boundary between the spring storage space 22b and the cassette storage space 22c in the figure, that is, near the front or back of the switch S2 in the drawing. In FIG. 5, 23 is a shaft that connects the main body 21 and the cassette storage section 22. A spring 33 is hung between the branch section 22a of the cassette storage section 22 and the main body 21, and the cassette storage section 22 Although the biasing force 33 applies a counterclockwise rotational force about the shaft 23, this rotation is restricted by the pin 34.

Reference numeral 24 denotes a spring, which is stored in the spring storage space 22b of the cassette storage section 22. However, the space 22b has a larger vertical dimension than the space 22c, and even if the spring 24 is expanded, its movement will not be within the space 22b. limited.

Reference numeral 25 denotes a locking pin provided on the cassette storage portion 22, which when the storage portion 22 is closed to the main body 21, engages the hook portion of a storage portion locking lever (not shown) provided on the main body 21. engage with.

Reference numeral 27 denotes a shaft implanted in the cassette storage section 22, which rotatably supports the cassette locking lever 28 and the stop lever 30. The levers 28 and 30 are biased into an integral configuration by a spring 32, but since a pin 29 is implanted in the lever 28 as shown, the levers 28 and 30 are normally attached to each other with a slight opening angle. Rotate.

A spring 31 is applied between the cassette locking lever 28 and the downward protrusion 22e of the cassette storage portion 22, and the spring 31 applies a counterclockwise rotational force to the levers 28 and 30 about the shaft 27. This rotation is regulated by a pin (not shown) provided in the front side of the paper of the cassette storage section 22, and the relationship between the cassette locking portion 28a of the lever 28 and the cassette is controlled by the insertion and removal of the cassette 1 or 1', which will be described later. and to enable the locking to be carried out without any trouble.

The other end 28b of the lever 28 is formed so as to come into contact with a cam portion (not shown) of an eject lever 36 during an operation for ejecting the cassette 1 or 1', which will be described later. Note that in the figure, 21a indicates a locking portion of the main body 21, and 30a indicates a tip end of the stop lever 30.

To explain the operation of the cassette loading and unloading device shown in FIG. Even if an attempt is made to close the cassette storage section 22, the distal end 30a of the stop lever and the stop section 21a of the main body come into contact with each other, making it impossible to close the cassette storage section 22. On the other hand, when the cassette 1 or 1' is further pushed in and its left end reaches the position indicated by the dashed line xx in the spring storage space, the locking lever 28 is rotated counterclockwise by the spring 31.
The locking portion 28a locks the right end of the cassette 1 or 1', and the spring 24 is loaded. At this time, the stop lever 30
Since the cassette storage section 22 rotates counterclockwise, its tip 30a no longer comes into contact with the stop section 21a of the main body.
is closed to the main body 21, and the locking pin 25 is closed to the main body 21.
It is locked by the hook part of the above-mentioned storage part locking lever. In this state, the switch S1 is opened, the switch S2 is opened or closed depending on the presence or absence of the notch 1'c, and the above-mentioned operations are performed.

To remove the cassette 1 or 1', push the operating button 36a of the eject lever 36 to the left in the figure, and the locking pin 2
5 is disengaged from the hook portion of the aforementioned storage section locking lever, the cassette storage section 22 is rotated counterclockwise by the spring 33, and at the same time, one end 28b of the locking lever 28 is moved to the eject lever 36. Pushed by an attached cam part (not shown), the locking lever 28 rotates clockwise, and its tip 2
Since the cassette 35 is unlocked by the cassette 8a, the cassette 1 or 1' protrudes from the loading port 22d due to the bias of the spring 24 until at least its left end reaches the interface between the spaces 22b and 22c. Further, when the cassette 1 or 1' is pulled out, the switch S1 is closed and the aforementioned operations are performed. At this time, the stop lever 30 also attempts to rotate clockwise, but its rotation is restricted by the stop portion 21a of the main body.
It moves upward while contacting the stop portion 21a.

In FIG. 5, the switch S1 is opened when the cassette 1 or 1' is loaded, but it may be closed when the cassette is loaded, and the switch S2 also has a notch 1'c for inserting the cassette 1'. It may be closed at times.

In short, the activation or inactivation of the switch S1 when loading or unloading the cassette 1 or 1' and the cassette 1
The above-mentioned operations are carried out depending on whether the switch S2 is activated or deactivated depending on the presence or absence of the notch in and 1'.

Although the example in which the recording medium and the dedicated cleaning member are rotating sheets has been described above, the present invention can be similarly applied to the case where these are rotating disks.

Effects of the Invention The first invention of this application is such that the recording or reproducing head is opposed to a member provided with a cleaning material, and the recording or reproducing head is cleaned by rotating the member provided with the cleaning material. In the constructed recording or reproducing apparatus, since a timer is provided to stop the rotation of the above-mentioned member after a predetermined time during cleaning, this rotational movement is kept to the minimum necessary time,
The recording or reproducing head can be efficiently cleaned while avoiding wear of the recording or reproducing head due to friction with the cleaning material as much as possible.

The second invention is provided with a means for setting the timer to the operating state only when the member provided with the cleaning material is loaded, so that when a recording medium not provided with the cleaning material is loaded. operate in normal recording or playback mode,
When the above-mentioned members are loaded, by operating in a timed operation mode for cleaning, it is possible to efficiently clean the recording or reproducing head while avoiding wear on the recording or reproducing head as much as possible.

[Brief explanation of the drawing]

FIG. 1(A) is a perspective view showing an example of a cassette containing a recording medium that is not provided with a cleaning material and is applied to the invention of this application, and FIG. 1(B) is a perspective view that is also applied to the invention of this application. A perspective view illustrating an example of a cassette incorporating a member that
The figure is a block diagram of a first embodiment of the cleaning device for a recording or reproducing head according to the invention of this application, FIG. 3 is a block diagram of a main part of a modification of the cleaning device of FIG. 2, and FIG. FIG. 5 is a block diagram of a second embodiment of the recording or reproducing head cleaning device according to the invention of the application, and FIG. be. In the figure, 1 and 1' are a cassette, 1'c is a notch provided in the cassette 1', 2 is a sheet rotation motor, 3 is a recording or reproducing head, 4 is a step motor, 6A is a cassette loading and unloading signal source, 6B is a cassette notch detection signal source;
7 is a system control unit, 8 and 8' are constant voltage sources, 9 is a time limiter, 9' is a timer, 10 is a control circuit, 11 is a motor drive circuit, 13 is a step motor drive circuit, 14A, 14B
is an analog gate, 15 is an inverter, ST is a seat,
Tc is a cleaning track, S1, S2, and S2' are switches, and S3 and S4 are position sensors.

Claims (6)

[Claims] (1) In a recording or reproducing apparatus configured such that the recording or reproducing head faces a member provided with a cleaning material and the member provided with the cleaning material is rotated to clean the recording or reproducing head, A cleaning device for a recording or reproducing head, comprising a timer for stopping the rotation of a member provided with the cleaning material at a predetermined time during cleaning. (2) The recording or reproducing head cleaning device according to claim 1, wherein the rotational speed of the member provided with the cleaning material is lower during cleaning than during recording or reproducing. (3) The recording or reproducing head cleaning device according to claim 1 or 2, wherein the rotating direction of the member provided with the cleaning material is opposite to that during recording or reproducing during cleaning. (4) In a recording or reproducing apparatus configured such that the recording or reproducing head faces a member provided with a cleaning material and the member provided with the cleaning material is rotated to clean the recording or reproducing head, a timer for stopping the rotation of the member provided with the cleaning material at a predetermined time during cleaning; and means for setting the timer to an operating state only when the member provided with the cleaning material is loaded; A recording or reproducing head cleaning device comprising: (5) The member provided with the cleaning material is housed in a cassette, and the means for setting the timer to an operating state includes means for identifying that the cassette has been detected. A cleaning device for a recording or reproducing head according to range (4). (6) Either one of the cassette containing the member provided with the cleaning material and the cassette containing the recording medium not provided with the cleaning material is provided with an identification means for identifying the two; A cleaning device for a recording or reproducing head according to claim 5, wherein the means for setting the timer to the operating state includes means for identifying whether the cassette is loaded based on the presence or absence of the identifying means.