JPH10188398A - Driving mechanism switching device and recording and/or reproducing device of tape cassette - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the driving mechanism switching device and the tape cassette recording and/or reproducing device in which the failure of the mode switching is avoided and the mode switching is surely conducted. SOLUTION: When an operating button is pressed, the tape cassette recording and/or reproducing device drives a mode switching motor in order to switch the operating position of the gears which constitute the driving mechanism (a step S1). If no mode switching takes place within a specified time, the mode switching motor is temporarily stopped (step S2 and S3). Then, the driving motor is driven and the gears, which constitute the driving mechanism, are operated (a step S5). After the driving motor is driven for a prescribed time, the mode switching motor is again driven (a step S7). If the mode is switched at this time, the process is terminated (a step S8). If no mode is switched, the process from the step S3 is repeated (a step S9).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving mechanism switching mechanism having a mode switching mechanism for switching the operating position of a gear constituting a driving mechanism to switch between operation modes such as a recording mode and a stop mode. The present invention relates to an apparatus and a recording and / or reproducing apparatus for a tape cassette, and particularly to a drive mechanism switching apparatus for driving the mode switching mechanism by a motor and a recording and / or reproducing apparatus for a tape cassette.

[0002]

2. Description of the Related Art Conventionally, there has been proposed a tape cassette recording and / or reproducing apparatus for recording and reproducing an audio signal and the like using a tape cassette.

[0003] For example, a recording and / or reproducing apparatus 300 for a tape cassette using a magnetic tape as a recording medium includes:
As shown in FIG. 30, a main body 301 having a recording / reproducing unit 303 for recording and / or reproducing an audio signal on a magnetic tape stored in a tape cassette, and a lid 302 attached to the main body 301 and rotatably opened and closed. It is composed of
In the tape cassette, a magnetic tape is wound around a pair of rotatable tape reels in the cassette. And
This tape cassette is configured such that a magnetic tape runs when a tape reel rotates.

The main body 301 is provided with an operation input button 305 for inputting operation of the apparatus. Also, the main body 30
The recording / reproducing section 303 included in the first tape reel includes a reel shaft engaged with a pair of tape reels, a capstan shaft and a pinch roller for running the magnetic tape at a constant speed, and recording and recording of audio signals on the magnetic tape. It has a magnetic head and the like for reproducing. The lid 302 is attached so as to close the recording / reproducing unit 303, and a cassette holder 304 for holding a tape cassette is provided inside.

In the tape cassette recording and / or reproducing apparatus 300, the tape cassette is inserted into a cassette holder 304 provided inside the lid 302 with the lid 302 opened. This tape cassette has an insertion end on the back side in the long side direction. This cassette holder 3
Reference numeral 04 holds the tape cassette with the tape cassette inserted. The lid 302 closes the tape cassette from the state in which the tape cassette is inserted into the cassette holder 304 to close the tape cassette to the recording / reproducing unit 3 of the main body 301.
03 is loaded. And recording on the tape cassette and / or
Alternatively, the playback device 300 is configured such that the tape cassette
03, and when an operation input button 305 provided on the main body 301 is pressed, operations such as recording and reproduction are started. For example, when the play button is pressed, the magnetic head comes into contact with the recording surface of the magnetic tape of the tape cassette, and furthermore, the magnetic tape runs to reproduce the audio signal.

The tape cassette recording and / or reproducing apparatus 300 switches among modes such as a forward reproduction (recording) mode, a reverse reproduction (recording) mode, and a stop mode. And control of operations such as recording / reproducing in the forward or reverse direction and stopping the tape cassette. The recording and / or reproducing apparatus 300 of the tape cassette first performs a recording or reproducing operation in each of these modes.
A mode switching operation is performed in which the magnetic head, the pinch roller, and the gears for driving the reel shaft are moved to change the operation position.

In the tape cassette recording and / or reproducing apparatus 300, the mode switching is performed by a mode switching motor separately from a drive motor for driving a reel shaft or the like to run a magnetic tape. Do. That is, the tape cassette recording and / or reproducing apparatus 300
When an operation input or the like is performed from the operation input button 305, the mode switching motor moves two gears for driving the two magnetic heads, the pinch roller, the reel shaft, and the like via a mode switching mechanism such as a cam gear. .

For example, when the mode is changed from the forward reproduction mode to the reverse reproduction mode, first, the drive motor for driving the reel axis and the like in the forward direction is switched to the transmission gear so as to drive the reel axis and the like in the reverse direction. Have to do. The mode switching motor switches this transmission gear via a mode switching mechanism such as a cam gear.

FIG. 3 shows such a mode switching mechanism.
This will be described below with reference to FIG. This mode switching mechanism is a part of the mechanism of the recording and / or reproducing apparatus 300 for a tape cassette.
The rewind mechanism is described.

In this mode switching mechanism, the chassis 311
Above, a drive motor 312 and a flywheel 313 are provided. The motor pulley 31 of the drive motor 312
A drive belt 314 is stretched between the outer circumference of the flywheel 2a and the flywheel 313. Therefore, the flywheel 313 is driven by the drive belt
The drive from the motor 12 is transmitted and driven to rotate. A drive gear 315 having the same rotation axis is provided on the flywheel 313. The driving gear 315 is connected to the flywheel 313, and is driven to rotate in conjunction with the flywheel 313.

A first reel rotating gear 316 and a second reel rotating gear 317 for rotating the reel shaft are provided on the chassis 311. When the two reel rotating gears 316 and 317 rotate the reel shaft, the tape reel of the tape cassette rotates and the magnetic tape runs.

A mode switching slider 318 is provided on the chassis 311. This mode switching slider 3
18 is interlocked with the rotation of a cam gear (not shown),
It moves parallel to the arrow A direction of 1 and the arrow B direction of FIG. The cam gear is driven by a mode switching motor. A swing base 319 is provided on the chassis 311. The swing base 319 swings in the direction of arrow C in FIG. 31 and in the direction of arrow D in FIG. 32 in conjunction with the mode switching slider 318.

The main gear 3 is mounted on the swing base 319.
20 are provided. This main gear 320 is always meshed with the above-described driving gear 315. When the swing base 319 swings in the direction of arrow C in FIG. 31, the main gear 320 rotates the first reel rotating gear 3.
16 meshes. Therefore, when the swing base 319 swings in the direction of arrow C in FIG. 31, the rotational operation of the drive motor 312 is transmitted to the drive belt 314, the flywheel 313, the driving gear 315, and the main gear 320. The rotation operation transmitted to 320 is transmitted to the second reel rotation gear 315, and the tape reel of the tape cassette rotates and the magnetic tape runs. Similarly, when the swing base 319 swings in the direction of arrow D in FIG. 32, the rotation operation of the drive motor 312 is transmitted to the first reel rotating gear 316, and the tape reel of the tape cassette rotates to rotate the magnetic tape. To run.

In the tape cassette recording and / or reproducing apparatus 300 having such a mode switching mechanism, for example, when an operation input such as fast-forward is input, the mode switching motor drives the cam gear to connect the main gear 320 to the main gear 320. The first reel rotating gear 317 is engaged. Then, the drive motor 312 is driven to rotate one reel shaft.
Also, a tape cassette recording and / or reproducing apparatus 300
Then, when a rewind operation input is made, the mode switching motor drives the cam gear to drive the main gear 320
And the second reel rotating gear 317 are engaged with each other. And
The drive motor 312 is driven to rotate the other reel shaft.

In the tape cassette recording and / or reproducing apparatus 300, the mode switching mechanism is used to fast-forward the magnetic tape in the forward and reverse directions, and
It has not only a rewinding mechanism but also, for example, a mechanism for switching between recording and reproducing modes in the forward and reverse directions.

[0016]

However, the above-described tape cassette recording and / or reproducing apparatus 300 drives the mode switching motor to connect the main gear 320 to, for example, the first gear.
33, the teeth of the respective gears do not mesh with each other, and the apexes of the teeth may abut on each other.

In such a case, the main gear 320 attempts to move in the direction of arrow E in FIG. 33, but the operation cannot be continued because the teeth of the gear are in contact with the vertices. Therefore, the tape cassette recording and / or reproducing apparatus 300
Cannot perform a mode switching operation, and cannot start a reproduction operation and a fast-forward operation based on an operation input.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and a drive mechanism switching device and a tape cassette recording / reproducing apparatus capable of avoiding failure of mode switching and capable of reliably switching modes. Alternatively, it is an object to provide a playback device.

[0019]

In order to solve the above-mentioned problems, a drive mechanism switching device according to the present invention moves an operating position of a gear constituting a drive mechanism and moves the gear in an operating direction of the drive mechanism. A drive mechanism switching device having a mode switching mechanism for switching between the drive mechanism and a drive motor for driving the drive mechanism, and moving the operating positions of gears constituting the drive mechanism to switch the operation direction of the drive mechanism. A mode switching motor that drives a mode switching mechanism, a position detection switch that detects an operating position of a gear included in the driving mechanism, and a control signal supplied to the driving motor to control the driving mechanism, and A control unit that supplies a control signal to the mode switching motor to control an operating position of a gear that forms the drive mechanism, wherein the control unit includes a tooth that forms the drive mechanism. A control signal is supplied to the mode switching motor to move the gear to a predetermined operation position, and after a predetermined time has elapsed, the predetermined operation position of the gear is detected by the position detection switch, and the predetermined operation position of the gear is detected. When it is not possible, a control signal is supplied to the drive motor to drive the drive mechanism, and a control signal is supplied again to the mode switching motor to move a gear constituting the drive mechanism to a predetermined operation position. I do.

In this drive mechanism switching device, if the operation direction of the drive mechanism cannot be switched even after a certain period of time by moving the operating position of the gear constituting the drive mechanism, the drive mechanism is driven. Then, the operating direction of the drive mechanism is switched by moving the operating position of the gear again.

Further, in the tape cassette recording and / or reproducing apparatus according to the present invention, the operating position of a gear constituting a drive mechanism for running the magnetic tape accommodated in the tape cassette is moved to operate the drive mechanism. What is claimed is: 1. A tape cassette recording and / or reproducing apparatus having a mode switching mechanism for switching directions, comprising: a drive motor for driving a drive mechanism for running a magnetic tape stored in the tape cassette; and a gear for constituting the drive mechanism. A mode switching motor that drives a mode switching mechanism that moves an operating position and switches the operating direction of the driving mechanism; a position detection switch that detects an operating position of a gear that constitutes the driving mechanism; A control signal is supplied to control the running of the magnetic tape stored in the tape cassette. A control unit for supplying a control signal to control an operation position of a gear constituting the drive mechanism, wherein the control unit switches the mode to move a gear constituting the drive mechanism to a predetermined operation position. A control signal is supplied to the motor, and after a lapse of a predetermined time, a predetermined operation position of the gear is detected by the position detection switch. If the predetermined operation position of the gear cannot be detected, a control signal is supplied to the drive motor. The driving mechanism is driven, and a control signal is supplied to the mode switching motor again to move a gear constituting the driving mechanism to a predetermined operating position.

In this tape cassette recording and / or reproducing apparatus, the operation position of the gear constituting the drive mechanism for moving the magnetic tape housed in the tape cassette is moved, and the operation of the drive mechanism is continued even after a certain time has passed. If the direction cannot be switched, the driving mechanism is driven, and then the operating position of the gear is moved again to switch the operating direction of the driving mechanism.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a recording and / or reproducing apparatus to which the present invention is applied will be described in detail with reference to the drawings. This recording and / or reproducing apparatus is a recording and / or reproducing apparatus for a small tape cassette having a size of about one-fourth of a normal tape cassette.

As shown in FIG. 1, a tape cassette 1 used in this recording and / or reproducing apparatus has a magnetic tape 3 wound around a cassette main body 2 having a rectangular main surface formed of a synthetic resin material. The tape reels 4 and 5 are rotatably housed. The cassette main body 2 has a magnetic tape 3 extending from the tape reels 4 and 5 extending on the front side thereof. Specifically, on the front side of the cassette body 2, recording / reproducing openings 6 and 7 into which a magnetic head serving as a recording and / or reproducing mechanism enters, and a pinch roller opening 8 into which a pinch roller enters. The magnetic tape 3 faces outward. Further, openings 9 and 10 into which the holding member on the recording and / or reproducing apparatus enters are provided outside the recording and reproducing openings 6 and 7.

The cassette main body 2 has a reel shaft insertion hole 13 facing the reel shaft holes 11 and 12 into which the tape reel driving mechanisms provided on the tape reels 4 and 5 are fitted. , 14 are provided. In the cassette main body 2, a capstan shaft hole 15 into which a capstan shaft is inserted is provided at the center of the front surface, and positioning holes 16 into which positioning pins are fitted are provided on both sides of the capstan shaft hole 15. , 17 are provided.

Further, the cassette body 2 is provided with erroneous recording prevention mechanisms 18 and 19 on both sides on the rear side.
The erroneous recording prevention mechanisms 18 and 19 include holes 20 and 21 provided in the cassette body 2 and cut pieces 22 and 23 provided to close the holes 20 and 21. In such erroneous recording prevention mechanisms 18 and 19, the cut pieces 22 and 23 are provided in the cassette body 2 and the holes 20 and 2 are provided.
In a state in which the tape cassette 1 is closed, the detection mechanism of the recording and / or reproducing apparatus 30 detects that the tape cassette 1 is in a state where recording on the magnetic tape 3 is possible.
The erroneous recording prevention mechanisms 18 and 19 are provided with holes 20 and 21 respectively.
When the cut pieces 22 and 23 are cut off and the lid is opened, the detection mechanism on the recording and / or reproducing apparatus side detects that the tape cassette 1 is in the recording disabled state.

The recording and / or
Alternatively, as shown in FIG. 2, the reproducing device 30 includes a recording / reproducing unit 31 that constitutes a recording / reproducing unit of the tape cassette 1.
And a speaker unit 32 detachably attached to the recording / reproducing unit 31.

The recording / reproducing unit 31 has a tape cassette 1 with the rear end in the long side direction of the tape cassette 1 as an insertion end.
And a main body 33 that constitutes a recording / reproducing unit for recording and / or reproducing the magnetic tape 3 contained in the tape cassette 1 and a lid 34 that closes the recording / reproducing unit in an openable and closable manner. You.

The recording / reproducing unit 31 has an outer casing made of a metal material such as aluminum (Al), and has a rectangular parallelepiped shape slightly larger than the outer shape of the tape cassette 1 as a whole. An operation unit 35 is provided on the front side of the main body 33. This operation unit 3
Reference numeral 5 denotes a push button, which includes a record button 36 for performing an operation of recording an audio signal on the magnetic tape 3 of the tape cassette 1, and a pause button 37 for temporarily stopping a recording or reproducing operation. You. The operation unit 35 is configured to, when pressed, press a diaphragm switch provided on a flexible substrate disposed in the main body 22.

The operation unit 35 has an erroneous operation prevention shutter 38 mounted on the main body 33. The erroneous operation prevention shutter 38 is slidably assembled over a first position covering the operation unit 35 and a second position facing the operation unit 35 outward. That is, the erroneous operation prevention shutter 38 slides the operation unit 35 to the second position facing the outside only when the user performs a recording operation or a pause operation of the recording operation, that is, the left direction in FIG. Sliding to prevent incorrect operation.

The body 33 is provided with an unlocking knob 39 for the lid 34 for rotating the lid 34 near the operation section 35 to open the recording / reproducing section. The lock release knob 38 slides along a guide hole 40 provided on the front side of the main body 33. The lock release knob 38 is urged leftward in FIG. 2 by a spring (not shown), and is located on the left side of the guide hole 40. In this state, although not shown, there is a locked state in which the locking claw on the main body 33 side is engaged with the engaging portion on the lid body 34 side. Then, the lock release knob 38 is slid rightward in FIG. 2 against the elastic force of the spring to release the lock state between the lock claw on the main body 33 side and the engagement portion of the lid 34. The lid 34 opens the recording / reproducing unit.

On one side of the main body 33, an earphone / microphone jack 41 is provided on the back side where the lid 34 is supported.
Is provided. This earphone / microphone jack 41
For example, when the speaker unit 32 is detached from the recording / reproducing unit 31, the user can listen to audio data reproduced by inserting an earphone. Also provided on this side surface are a volume knob 42, a tape speed switching knob 43, and an identification unit 44 that is lit only during recording.

On the other hand, the operation part 4 is provided on the main surface of the lid 34.
5 are provided. The operation unit 45 includes a rewind button 46 for performing a rewind operation of the magnetic tape 3 of the tape cassette 1 mounted on the recording / reproducing unit, and a fast-forward for similarly performing a fast-forward operation of the magnetic tape 3 of the tape cassette 1. A button 47, a stop button 48 for stopping operations such as playback and recording, and a playback button 49 for starting playback operations
And a hold knob 5 for holding the operation of the device.
0, a counter button 51 for performing a reset operation of a counter for displaying the progress of the magnetic tape 3, and a second setting for setting the apparatus to start recording only when the microphone picks up a sound of a certain volume or more. The operation buttons 46 to 49 are, similarly to the operation unit 35 described above, pressed when these operation buttons 46 to 49 are operated by pressing the diaphragm switch provided on the flexible substrate provided in the main body 22. Is configured to be pressed.

A liquid crystal display panel 53 is provided on the lid 34.
Is provided. On the liquid crystal display panel 53, for example, a mark indicating the current state of the apparatus, for example, a reproduction and recording state, a mark indicating the remaining amount of a battery serving as a power supply, and a running amount of the magnetic tape 3 are displayed. The tape counter is displayed.

The speaker unit 32 includes an earphone / microphone jack 41 of the recording / reproducing unit 31, a volume knob 4
2. Tape speed switching knob 43 and identification unit 44
Is removably attached to the side surface on which is not provided.
The speaker unit 32 includes a speaker device therein. And the speaker unit 3
Numeral 2 outputs audio data recorded on the magnetic tape 3 of the tape cassette 1 mounted on the recording / reproducing unit only when it is mounted on the recording / reproducing unit 31. Although not shown, the speaker unit 32 is provided with a DC IN jack on a side surface.

The recording / reproducing unit 31 described above
The speaker unit 32 is provided with a power supply unit. The power supply unit of the recording / reproducing unit 31 is configured to be able to load one AAA battery, and the power supply unit of the speaker unit 32 is configured to be able to load one AAA battery. In addition, it is configured such that power can also be supplied from the DC IN jack provided in the speaker unit 32 described above. That is, the recording and / or reproducing apparatus 30 has three power supplies: a power supply for the recording / reproducing unit 31, a power supply for the speaker unit 32, and a power supply for the DC IN jack. When a battery is loaded only in the recording / reproducing unit 31, the recording / reproducing device 30 is supplied with power from the battery, and both the recording / reproducing unit 31 and the speaker unit 32 are used. When a battery is loaded in both, power is supplied from both of them, and when a battery is loaded in either the recording / reproducing unit 31 or the recording / reproducing unit 31, both batteries are loaded. Or the recording / reproducing unit 31 and the speaker unit 3
DC even if no battery is loaded in any of 2
When the IN jack is connected to the speaker unit 32, power is supplied from the DC IN jack preferentially.

Such a recording and / or reproducing apparatus 30
When the recording / reproducing unit 31 is used only, the size of the recording / reproducing unit 31 is slightly larger than the size of the tape cassette 1 to be used. Further, when reproducing the audio data recorded on the magnetic tape 3 of the tape cassette 1, the recording and / or reproducing apparatus 30 can attach the speaker unit 32 to output the audio, thereby improving the convenience. . Further, the recording and / or reproducing device 3
0 is the DC IN even if a battery is loaded in the power supply unit of the recording / reproducing unit 31 or the speaker unit 32.
When power is supplied from the jack, this is used preferentially, and consumption of battery power is prevented.

As shown in FIG. 3, such a recording and / or reproducing apparatus 30 has a mechanical chassis 64 in which the tape cassette 1 is mounted, and a rotatable with respect to the mechanical chassis 64. The attached cassette holder 54 holding the tape cassette 1 is attached. Then, the mechanical chassis 64 includes the cassette holder 54.
3 constitute a recording / reproducing unit 53 for recording and / or reproducing the tape cassette 1 in a closed state rotated downward in FIG. Then, the cassette holder 54 is
The tape cassette 1 is inserted with its rear side in the longitudinal direction as the insertion end, and the recording / reproducing opening 6 of the tape cassette 1 is inserted.
7, the front side provided with the pinch roller openings 8, 9 and the openings 9, 10 is inserted so as to correspond to the front side of the mechanical chassis 64.

The mechanical chassis 64 is made of a metal material and has a size substantially the same as the outer shape of the tape cassette 1. It is configured so that recorded audio data can be reproduced. That is, the recording / reproducing section 53 is provided with a reel shaft which is fitted to the reel shaft holes 11 and 12 of the tape cassette 1 at a distance from the central region. The recording / reproducing unit 53 includes:
Positioning pins 57 and 58 are provided upright on the front side of the tape cassette 1 so as to be separated from the front side. The positioning pins 57 and 58 are fitted into positioning holes 16 and 17 provided on the front side of the tape cassette 1. Further, in the recording / reproducing section 53, a capstan shaft 59 is erected at the center on the front side. The capstan shaft 59 is provided with a capstan shaft hole 15 provided on the front side of the tape cassette 1.
Is fitted to.

The recording / reproducing section 53 is provided with a pinch roller 63 at the center on the front side thereof so as to face the capstan shaft 59. The pinch roller 63 presses the magnetic tape 3 together with the capstan shaft 59 so that the magnetic tape 3 runs while being pressed against the magnetic tape 3 during recording or reproduction. Magnetic heads 61 and 62 are arranged on both sides of the pinch roller 63. These magnetic heads 61 and 62 enter the tape cassette 1 from the recording and reproducing openings 6 and 7 of the tape cassette 1 and come into contact with the magnetic tape 3. And these magnetic heads 6
When the magnetic tape 3 is fast moving or rewinding at high speed running or when the magnetic tape 3 is not running, the pinch rollers 63 do not enter the predetermined openings 6, 7 and 8. Has been.

Specifically, the recording and / or reproducing apparatus 30
The magnetic heads 61 and 62 and the pinch roller 63 of FIG.
As shown in (1), a state in which the magnetic tape 3 of the tape cassette 1 runs at a constant speed in the reverse rotation direction (hereinafter referred to as mode 1).
And a state in which the magnetic tape 3 travels in the forward rotation direction and a state in which the magnetic tape 3 travels in the forward or reverse direction at high speed (hereinafter referred to as mode 2). And the high-speed running state of the magnetic tape 3 in the forward or reverse rotation direction (hereinafter referred to as mode 3).
The position is different from that in a state in which the magnetic tape of the tape cassette 1 runs at a constant speed in the normal rotation direction (hereinafter referred to as mode 4).

In mode 1, the reverse magnetic head 61 used when the magnetic tape 3 runs in the reverse direction and the pinch roller 63 are moved from the recording / reproducing opening 7 and the pinch roller opening 8 of the tape cassette 1 to the cassette body. 2 has been entered. In modes 2 and 3, the magnetic heads 61 and 62 and the pinch roller 63 are in a state of being retracted from inside the cassette body 2. In mode 4, the normal rotation magnetic head 62 used when the magnetic tape 3 runs in the normal rotation direction, and the pinch roller 63 are moved from the recording / reproducing opening 6 and the pinch roller opening 8 of the tape cassette 1 into the cassette main body 2. In the state of having entered. As described above, in the recording and / or reproducing apparatus 30, the positions of the magnetic heads 61 and 62 and the pinch roller 63 are different in the four modes. These modes are switched in the order of mode 2, mode 4, mode 3, mode 1, mode 2, mode 4, and so on. For example, when the magnetic tape 3 travels at a constant speed in the normal rotation direction from the stop state when the magnetic tape 3 runs in the normal rotation direction, the mode is switched from mode 2 to mode 4. When the magnetic tape is rotated from the constant speed in the normal rotation direction to the stop state, the mode is switched in the order of mode 4, mode 3, mode 1, and mode 2 to switch from mode 4 to mode 2. The recording and / or reproducing apparatus 30 can take out the tape cassette 1 from the recording / reproducing section 53 only in the modes 2 and 3 in which the magnetic heads 61 and 62 and the pinch roller 63 are retracted from the inside of the cassette body 2. And

Next, the mechanism for switching the mode of the recording and / or reproducing apparatus 30 to mode 1, mode 2, mode 3, and mode 4 will be described in detail.

As shown in FIG. 5, the mode switching mechanism includes a mode switching motor 65 on a mechanical chassis 64,
It has a pin-on gear 66 attached to the drive shaft of the switching motor 65, a transmission gear 67 meshed with the pin-on gear 66, and a worm gear 68 meshed with the transmission gear 67. And, in this worm gear 68,
The large-diameter teeth 69a of the first intermediate gear 69 having the large-diameter gear 69a and the small-diameter gear 69b are meshed.
A second intermediate gear 70 meshes with the small-diameter tooth portion 69b, and the second intermediate gear 70 meshes with a third intermediate gear 71. The third intermediate gear 71 is meshed with a large-diameter gear portion 72a provided integrally with the fourth intermediate gear 72. The cam gear 73 meshes with a small-diameter gear portion 72b provided integrally with the fourth intermediate gear 72.

The cam gear 73 is supported by a support shaft 74 erected on a mechanical chassis 64 and rotated by a fourth intermediate gear 72, as shown in FIGS. This cam gear 73 has magnetic heads 61 and 62 on one main surface.
Is provided on the other main surface, and reel shaft rotating gears 107, 108 for rotating the reel shafts 55, 56 in the mode 2 or mode 3 in which the magnetic tape 3 runs at high speed. Second cam groove 76 for selecting the
Is provided. The convex portion 136 of the connecting lever 135 is fitted into the first cam groove 75. And where
The cam gear 73 of the convex portion 136 stops at the position of each mode indicated by oblique lines of the first cam groove 75 shown in FIG.
The second cam groove 76 includes a mode switching slider 10.
One support pin 104 is inserted. Then, the cam gear 73 of the support pin 104 stops at the position of each mode indicated by oblique lines of the second cam groove 76 shown in FIG. The cam gear 73 has a hole 79. As shown in FIG. 7, a position detection switch 81 for detecting each of the modes 1, 2, 3, and 4 based on the rotation angle of the cam gear 73 is attached to the hole 79.

The position detecting switch 81 is mounted on a printed circuit board 82 as shown in FIG. As shown in FIGS. 8 to 10, the position detection switch 81 includes a disk-shaped base 83 fixed to a printed circuit board 82, and a rotating body 84 rotatably mounted on the base 83. . As shown in FIG. 8, a fixed contact portion 85 for mode 1 corresponding to mode 1 is provided on the base 83 in the circumferential direction.
A mode 2 fixed contact portion 86 corresponding to mode 2,
A mode 3 fixed contact portion 87 corresponding to mode 3 and a mode 4 fixed contact portion 88 corresponding to mode 4 are formed. Further, on one side edge of the base 83, terminals 89 to 93 for parallel electrical connection to the printed circuit board 82 are provided. The mode 1 fixed contact portion 85
The mode 2 fixed contact portion 86 is connected to the outer terminal 90 by a pattern formed around the circumference, and the mode 2 fixed contact portion 86 is connected to the outer terminal 90 by a pattern formed around the circumference. The mode 3 fixed contact 87 is connected to the terminal 91 by a pattern, and the mode 4 fixed contact 88 is
It is connected to the terminal 92 by a pattern. Moreover,
The base 83 is provided with an annular fixed contact portion 94 for GND on the inner peripheral side of each of the fixed contacts 85 to 88, and the fixed contact portion 94 is connected to the terminal 93 via a pattern. Further, a support shaft 95 for supporting the rotating body 84 is provided at a central portion on the inner peripheral side of the fixed contact portion 94. In the base 83, an insulating region is formed in a region where the fixed contact portions 85 to 88 and 94 are not provided.

As shown in FIG. 9, the rotating body 84
A shaft hole 95 through which a support shaft 95 provided on the base 83 is inserted is provided. Thereby, the rotating body 84 is rotatably supported. The metal plate 9 is provided on the back surface of the rotating body 84.
8 are provided. Terminal 96
Are provided on the outer peripheral side of the rotating body 84, and the modes 1 to 4
Fixed contact portions 85-88. Terminal 97 is
It is provided on the inner peripheral side of the rotating body 84 and is in contact with a fixed contact portion 94 for GND. Further, as shown in FIG. 10, the rotating body 84 has a convex portion 99 on the surface. The projection 99 is fitted into the hole 79 of the cam gear 73 described above.

[0048] Such detection switch 81 by the cam gear 73 is rotated by the rotating body 84 is rotated in the direction of arrow X ₁ in FIG. 10, the fixed contact portions of the terminals 96 are sequentially mode 1-4 The state of each mode is detected by making contact with 85 to 88 to achieve conduction.

As shown in FIG. 5, a mode switching slider 101 for switching each mode is attached to the mechanical chassis 64. The mode switching slider 101 is slidably attached to the front side of the mechanical chassis 64 in the longitudinal direction (arrow X _{3 in} FIG. 5).
Direction, X ₄ direction). Specifically, the mode switching slider 101 has slits 102a and 102b at two locations. And the slits 102a, 102b
The guide pin 103a, 103b is inserted into the
Guide the longitudinal slide. Then, in the mode switching slider 101, the support pin 104 provided integrally with the mode switching slider 101 is fitted into the first cam groove 75 provided in the cam gear 73. Therefore, the mode switching slider 101 is driven by the mode switching motor 65 and the cam gear 7.
3 when rotated in an arrow X ₃ direction in FIG. 5, the arrow X ₃ direction corresponding to the respective modes, so that the slide in the X ₄ direction.

A support shaft 105 is provided on the mode switching slider 101 at a position corresponding to the lower side of the cam gear 73. The support shaft 105 has a mode 1 or a mode 4
Freely connecting member 106 is rotated in the arrow X ₅ the direction or arrow X ₆ direction in FIG. 5 for selecting the reel shaft gear 107 for rotating the reel shaft when performing constant-speed running of the magnetic tape 3 when Installed. Also, this connecting member 1
Reference numeral 06 is mounted coaxially with the reel shaft rotating gear 107. Such coupling member 106, the mode switch actuator 101 is rotated in the arrow X ₅ the direction or arrow X ₆ direction by sliding in the arrow X ₃ direction, X ₄ direction. The connecting member 106 includes a pair of stopper pieces 1 provided near the reel shaft rotating gear 107 at predetermined intervals.
09a and 109b are provided. Between these stopper pieces 109a and 109b, the reel shaft rotating gear 10 is provided.
An engaging piece 112 provided on a rotating base 111 for selecting one of the members 7 and 108 is arranged.

[0051] The rotating base 111 is rotatably supported on a support shaft 113, Fig. 5 arrow X ₇ direction, and is rotatable in the arrow X ₈ direction. The pivot base 111 has a support shaft 11 attached thereto.
A driving gear 114 having a rotating shaft 3 is attached. In this driving gear 114, a first gear portion 114a and a second gear portion 114b are formed integrally. The first gear portion 114a is provided with the reel shaft rotating gears 107 and 108 in the mode 2 or the mode 4 for running the magnetic tape 3 at high speed.
Is engaged with the second gear portion 117b of the main gear 117 for rotating any one of the two. Also, the second gear portion 114
b is engaged with driven gears 115 and 116 attached on both sides of the main driving gear 114.

Such a driving gear 114 and a driven gear 1
15,116 is pivoted base 111 attached, when connecting member 106 is rotated in the arrow X ₆ direction, it is rotated in the arrow X ₈ direction engaging piece 112 pushed by the stopper pieces 109a, reel The shaft rotation gear 107 and the driven gear 115 mesh with each other. This state is a mode 1 state in which the magnetic tape 3 runs at a constant speed in the reverse rotation direction.

The rotating base 111 is connected to the connecting member 106.
There When rotated in the arrow X ₅ direction, the locking piece 112 is rotated in the arrow X ₇ direction by being pushed by the stopper pieces 109b,
The reel shaft rotation gear 108 and the driven gear 116 mesh with each other. This state is a mode 4 state in which the magnetic tape 3 runs at a constant speed in the normal rotation direction.

Further, in the rotating base 111, the locking piece 112 is rotated by the connecting member 106 and the stopper piece 109 is rotated.
a, 109b, the rotating base 111 rotates in conjunction with the driven gears 115, 116
Are not meshed with any of the reel shaft rotating gears 107 and 108. This state is a mode 2 or mode 3 in which the magnetic tape 33 runs at high speed. That is, only the first gear portion 114a of the driving gear 114 is
In mode 2 or mode 4 in which the magnetic tape 3 runs at high speed, the magnetic tape 3 is engaged with the second gear portion 117b of the main gear 117 that rotates one of the reel shaft rotating gears 107 and 108.

In the cam gear 73, as shown in FIG. 5, in the second cam groove 76, the reel shaft rotating gear 10 in modes 2 and 3 in which the magnetic tape 3 runs at high speed.
A connecting lever 135 constituting a second selecting means for selecting any one of 7, 108 is attached. The connecting lever 135 has a convex portion 136 provided at one end thereof fitted in the second cam groove 76, and a central portion pivotally supported by a supporting shaft 120 supporting the flywheel gear 110. Therefore, such a connecting lever 135 is indicated by an arrow X _{9 in} FIG.
Direction will be rotated in the arrow X ₁₀ direction. The other end is configured as a gear mounting surface, and the main gear 11
7 is supported. The main gear 117 has a large diameter first gear.
And a small-diameter second gear portion 117b are integrally formed. The first gear portion 117a is, X ₉ direction, even in the case of operating the rotation of X ₁₀ direction, always meshes with the flywheel gear 110. The first gear portion 117a, by the cam gear 73 is rotated in the X ₂ direction, when the coupling lever 135 is rotated in the X ₈ direction is meshed with the reel shaft gear 107, the coupling lever when 135 is rotated in the X ₁₀ direction is meshed with the reel shaft gear 108, the reel shaft gear 107, a
08 is rotated, and the magnetic tape 3 is run at high speed. The second gear portion 117b is always meshed with the first gear portion 114a of the driving gear 114. The flywheel gear 110 is connected to the connecting lever 13 as shown in FIG.
5 is rotatably supported together with a support shaft 120 for supporting the support shaft 5. A flywheel 130 is fixedly mounted coaxially above the flywheel gear 110. Flywheel 130 is an endless belt 1
It is connected to a drive motor 132 via 31. Further, the support shaft 120 becomes the capstan shaft 59.

On the front side of the mechanical chassis 64, magnetic heads 61 and 62 are mounted on both sides thereof.
Since the two magnetic heads use the same supporting method, the magnetic head 61 will be described below in detail with reference to FIGS.

The magnetic head 61 is, as shown in FIG.
It is supported by a magnetic head support arm 119 which is rotated about a support shaft 118 erected on the mechanical chassis 64 as a rotation fulcrum. The support arm 11 for the magnetic head
9, a magnetic head support member 121 having a magnetic head 61 mounted on one surface side is fixed by screws. Further, the magnetic head support arm 119 is provided with bosses 122a, 122b, 122c at three places on the other surface on the side to which the magnetic head 61 is not attached.
As shown in FIG. 11, the bosses 122a, 122b, 122c are provided with a height corresponding to the distance from the surface of the magnetic head support arm 119 having various steps to the mechanical chassis 64 serving as the reference surface. Have been.

The magnetic head support arm 119 on which the magnetic head 61 is supported is supported by a support shaft 118 as shown in FIGS. That is, as shown in FIG. 13, the mechanical chassis 64 includes a first base 118a having the largest shaft diameter, and a shaft diameter slightly smaller than the shaft diameter of the first base 118a on the base 118a. And a shaft portion 118c having the smallest shaft diameter on the base 118. On the other hand, the magnetic head support arm 119 is provided with a cylindrical sleeve 123 into which the support shaft 118 is inserted. The sleeve 123 is opened with a hole diameter substantially the same as the shaft portion 118c, and a side edge corresponding to a root portion of the support shaft 118 is formed by a first base 118a and a second base 118b. It is formed with a step corresponding to the step formed. Then, the support arm 119 for the magnetic head is
8, the torsion coil spring 124 is attached to the outer peripheral side of the sleeve 123. This torsion coil spring 1
24 is locked by a locking portion 126 provided on a rising wall 125 provided with one end rising to the side edge of the mechanical chassis 64, and the other end is mounted on a magnetic head support arm 119. The support pin 127 formed as above is locked. Then, the torsion coil spring 124 is stopped and attached in a state where the upper end thereof is contracted by the washer 128.

Therefore, the support arm 11 for the magnetic head
9 is positioned in the vertical and horizontal directions by being supported by the support shaft 118, and is positioned in the height direction by being pressed downward by the elastic force of the torsion coil spring 124. Positioning in the height direction by the torsion coil spring 124 is performed by the bosses 122a, 122b, 122c provided on the other surface on the side where the magnetic head 61 is not attached.
This is steadily performed by the magnetic head support arm 119 being steadily pressed by the mechanical chassis 64 serving as a reference plane through the. Also, the bosses 122a, 122b, 122c
Are distributed around the support shaft 118 so that the pressing force is evenly applied to support the magnetic head support arm 119 in a state parallel to the mechanical chassis 64. That is, the support arm 11 for the magnetic head
9 is positioned in the vertical and horizontal directions by the support shaft 118, and the positioning in the height direction is performed by the torsion coil spring 124.
Will be performed. As shown in FIG. 10, one end of the torsion coil spring 124 is locked by a locking portion 126 provided on a rising wall 125, and the other end is mounted on a support arm 119 for a magnetic head. The magnetic head 61 supported by the magnetic head support arm 119 is locked by the support pin 127 formed as shown in FIG.
Biasing the middle arrow X ₁₁ direction.

Furthermore, the support arm 119 for the magnetic head
As shown in FIG. 11, bosses 122a, 122b,
A support pin 129 is erected on a surface on which 122c is provided. This support pin 129 is used for the mode switching slider 10.
The support arm 119 for the magnetic head is pressed against the cam surface provided in 1 is rotated in 11 arrow X ₁₂ direction.

The magnetic heads 61, 6 thus supported
2 is in the following state in each mode. First, in the mode 1, as shown in FIG. 14, the reverse magnetic head 61 used when the magnetic tape 3 runs in the reverse direction enters the cassette main body 2 through the recording / reproducing opening 7 of the tape cassette 1. It is in. That is, FIG.
4, a driving gear 114 and a driven gear 115,
The rotating base 111 to which the 116 is attached is connected to the connecting member 1.
When 06 is rotated in the arrow X ₆ direction, the stopper piece 109
engaging piece 112 pressed is rotated in the arrow X ₈ direction by a, the reel shaft gear 107 and the driven gear 115 is meshed. On the other hand, the main gear 11 attached to the connecting lever 135 connected to the first cam groove 75 of the cam gear 73
7, the first gear portion 117a is a reel shaft rotating gear 10
7 and 108, and are in mesh with only the flywheel gear 110. Main gear 117
The second gear portion 117b is meshed with the first gear portion 114a of the driving gear 114. Accordingly, when the drive motor 132 is driven, the flywheel 130 rotated via the endless belt 130 and the flywheel 130 rotates the reel shaft rotation gear 107, whereby the driving gear 114 is rotated via the main gear 117. The driven gear 115 is rotated by the rotation of the driven gear 115. As a result, the reel shafts 55 and 56 in the recording / reproducing unit 53 for recording and / or reproducing the magnetic tape 3 of the tape cassette 1 are rotated.

At this time, the magnetic heads 61 and 62 are
The state is as shown in FIG. That is, the mode switching slider 101 is provided with the cam surfaces 133 and 134 having three steps. This cam surface 133,
Support pins 129 and 129 provided on the other surface of the magnetic head support arm 119 are in contact with 134. Then, the support pins 129, 129 which abut the cam surfaces 133 and 134, by the mode switch actuator 101 is slid in the arrow X ₃ direction or X ₄ direction,
A first position by further a second position raised one step than that moves over a third position raised one step than this, the magnetic head 61 and 62 arrows X ₁₁ or arrow X
It will be rotated in ₁₂ directions. Here, the support pins 12
When the magnetic head 9 is at the first position, the magnetic heads 61 and 62 are in a state of entering the cassette main body 2, and when the magnetic heads 9 are at the second and third positions, they are at positions retracted from the cassette main body. Therefore, in the state of the mode 1, the support pins 129 of the magnetic head 61 side is in the first position, the recording reproducing unit 53 to rotate the magnetic head 61 in the arrow X ₁₁ direction
Is inserted into the cassette main body 2. On the other hand, the support pins 129 of the magnetic head 62 side is in a third position, in a state that retracted from the magnetic head 62 arrow X ₁₂ direction is rotated in the cassette main assembly 2.

Next, in the mode 2, as shown in FIG. 15, the magnetic heads 61 and 62 and the pinch roller 63 are in a state of being retracted from the inside of the cassette body 2. That is,
Rotation base 111, connecting the member 106 is rotated in the arrow X ₆ direction, the stopper piece 109a, ready to not be pushed in any of the 109b, the driven gear 115 in conjunction with this,
116 is not engaged with any of the reel shaft rotating gears 107 and 108. On the other hand, the first gear portion 117a of the first cam groove 75 main gear attached to the connected coupling lever 135 and 117 of the cam gear 73, while being meshed with the flywheel gear 110, rotated in the arrow X ₁₀ direction As a result, it is in a state of being engaged with the reel shaft rotating gear 108. The second gear portion 117b of the main gear 117 is connected to the first gear portion 114a of the driving gear 114.
Are engaged. That is, the reel shaft rotating gear 108
Is not rotated by the driven gear 116 but is rotated by the first gear portion 117a of the main gear 117.

At this time, the magnetic heads 61 and 62 are
The state is as shown in FIG. That is, the magnetic head 61
Support pins 129 of the side, by the mode switch actuator 101 is slid in the arrow X ₄ direction, from a first position to move to the second position, it is in a state where the magnetic head 61 is retracted from the cassette body 2 You. On the other hand, the magnetic head 62
The side support pin 129 is moved from the third position to a third position close to the second position. Therefore, the magnetic head 6
Both 1 and 62 are retracted from the cassette body 2.

Next, in mode 4, as shown in FIG. 16, the normal rotation magnetic head 62 used when the magnetic tape 3 runs in the normal rotation direction is moved from the recording / reproducing opening 6 of the tape cassette 1 to the cassette In the state of having entered.
That is, the rotating base 111 is connected to the connecting member 106 by the arrow X.
When ₆ is rotated in the direction engaging piece 112 is rotated in the arrow X ₇ direction by being pushed by the stopper pieces 109b, the reel shaft gear 108 and the driven gear 116 is meshed. on the other hand,
The first gear portion 117a of the first cam groove 75 main gear attached to the connected coupling lever 135 and 117 of the cam gear 73 is rotated in the arrow X ₆ direction, in any of the reel shaft gear 107 Are not engaged with each other, and are engaged only with the flywheel gear 110. The second gear portion 117b of the main gear 117 is
Of the first gear portion 114a. Accordingly, when the drive motor 132 is driven, the flywheel 130 rotated via the endless belt 130 and the flywheel 130 rotates the reel shaft rotation gear 107, whereby the driving gear 114 is rotated via the main gear 117. The driven gear 116 is rotated by the rotation of the driven gear 116.

At this time, the magnetic heads 61 and 62
The state is as shown in FIG. That is, by mode switching slider 101 is slid in the arrow X ₄ direction, the support pins 129 of the magnetic head 61 side from the second position to move to the third position, retracting the magnetic head 61 from the cassette body 2 It is in the state that was done. On the other hand, the magnetic head 6
The support pin 129 on the second side moves from the third position to the first position,
That is, it is moved to a position where it enters the cassette body 2. Thus, the magnetic head 62 is rotated in the arrow X ₁₁ direction, is in a state of entering into the cassette body 2 of the recording and reproducing unit 53.

Next, in mode 3, as shown in FIG. 16, the magnetic heads 61 and 62 are in a state of being retracted from the inside of the cassette body 2. That is, rotation base 111, the connecting member 106 is rotated in the arrow X ₅ direction, the stopper piece 109a, ready to not be pushed in any of the 109b, the driven gear 115, 116 reels Along with this The shaft rotation gears 107 and 108 are not meshed. On the other hand, the main gear 11 attached to the connecting lever 135 connected to the first cam groove 75 of the cam gear 73
7 is provided with a flywheel gear 11.
While it is meshed with 0, by being rotated in the arrow X ₉ direction in a state where it is meshed with the reel shaft gear 107. The second gear portion 117b of the main gear 117 is meshed with the first gear portion 114a of the driving gear 114.
That is, the reel shaft rotating gear 107 is driven by the driven gear 115
The main gear 117 is not rotated by the
Is rotated by the gear portion 117a.

At this time, the magnetic heads 61 and 62
The state is as shown in FIG. That is, by mode switching slider 101 is slid in the arrow X ₃ direction, the support pins 129 of the magnetic head 61 side, even in the third position moved to the second position, the magnetic head 61 from the cassette body 2 It is in a state of being evacuated. On the other hand, the support pin 129 on the side of the magnetic head 62 is moved from the first position to the second position, that is, the magnetic head 62 is retracted from the cassette body 2.

Next, the support mechanism of the pinch roller 63 provided at the center of the front surface of the mechanical chassis 64 will be described in detail.

[0070] The pinch roller 63, as shown in FIG. 18, one end portion the front 18 of the support shaft 141 that is implanted in the side corners of arrow X ₁₃ direction of the mechanical chassis 64, the arrow X ₁₄ direction Is supported by a support arm 142 rotatably supported by That is, the pinch roller 63 is rotatably supported by the support shaft 143 provided at the other end of the support arm 142. Moreover, the support arm 142, Fig. 18 in the arrow X ₁₅ direction to the mechanical chassis 64 is pivoted from the pivot arm 144 pivotally mounted on the arrow X ₁₆ direction. The turning arm 144 is turned around a support shaft 146. The rotating arm 144 has a pressed portion 147 at one end. This pressed part 147
Are a pair of cam pieces 148, 149 provided on the mode switching slider 101 positioned in parallel with the rotating arm 144.
It is pressed to be rotated in the arrow X ₁₅ direction. The support arm 142 and the rotation arm 144 are connected to the mechanical chassis 64.
Are connected by a torsion spring 151 attached to a support shaft 141 implanted at the center. That is,
One end of the torsion spring 151 is locked by a boss 152 provided on the rotating arm 144, and the other end is locked by a locking portion 153 provided on the support arm 142. Thus, the torsion spring 151
Biases the support arm 142 in the X ₁₃ direction urges the pivot arm 144 in the arrow X ₁₆ direction.

The pinch roller 63 thus supported
Are in the mode 1 as shown in FIG. In this mode 1, the magnetic tape 3 travels at a constant speed in the reverse rotation direction, and recording or reproduction is performed. Therefore, as shown in FIGS. 3 and 13, the magnetic head 61 is in a state of entering the cassette main body 2. . In the mode 1, the pinch roller 63 holds the magnetic tape 3 by the flywheel 130 and the capstan shaft 59 which is coaxial with the flywheel 130, and runs the magnetic tape 3 at a constant reverse rotation speed. Here, the cam piece 148 of the mode switching slider 101 is
51 rotating arm is urged in the arrow X ₁₆ direction by 1
And it is rotated in the arrow X ₁₅ direction presses the pressed portion 147 of the 44. And, along with this, the support arm 142
The torsion spring 151 rotates in the direction of arrow X <b> 13 to enter the cassette body 2.

Next, the pinch roller 63 is set in the mode 2 as shown in FIG. In this mode 2, as shown in FIG. 4 and FIG.
In the forward running direction, and the high-speed running of the magnetic tape 3 in the forward or reverse direction. Therefore, the pinch roller 63 and the magnetic heads 61 and 62 are in a state where the pinch roller 63 is retracted from the cassette body 2. Therefore, in the mode 2, the mode switch actuator 101 is slid in the arrow X ₄ direction in the figure, the pressed portion 147 is positioned between the cam piece 148, 149 is in a state not pressed thereto. As a result, the rotating arm 144 is moved by the torsion spring 151 by the arrow X.
_It is turned in ₁₆ directions. Thus, the support arm 142 is in a state of being retracted from the torsion spring 151 by drawing X ₁₄ is rotated in the direction the cassette main assembly 2.

Next, the pinch roller thus supported
Reference numeral 63 denotes a state in the mode 4 as shown in FIG.
State. This mode 4 is shown in FIG. 4 and FIG.
As described above, the magnetic tape 3 is driven at a constant speed in the normal rotation direction, and
Since recording or reproduction is performed, the magnetic head 62
In this state, it has entered the main body 2. And in mode 4
, The pinch roller 63 is coaxial with the flywheel 130
Of the magnetic tape 3 by the capstan shaft 59 of FIG.
The magnetic tape 3 is caused to run forward at a constant speed. Here, this mode
In mode 4, the mode switching slider 101 is_FourOne
And the pressed portion 147 is moved by the cam piece 149.
And the rotating arm 144 is moved by the arrow X _FifteenPivoted in the direction
I'm making it. And, along with this, the support arm 142
Arrow X by torsion spring 151₁₃Rotate in direction
Then, the state is entered into the cassette main body 2.

The mode 3 is a stop state when the magnetic tape 3 runs in the reverse direction and a high-speed running state of the magnetic tape 3 in the normal or reverse direction, similar to the mode 2 state described above. Reference numeral 63 denotes a state in which the pinch roller 63 is retracted from the cassette body 2 together with the magnetic heads 61 and 62. That is, this state is the mode switch actuator 101 from the state of the mode 4 is pressed portion 147 described in the mode 2 is positioned between the cam piece 148, 149 by being slid in the arrow X ₃ direction in FIG. 20 , Are not pressed by these. Rotating arm 144
Is in a state of being rotated in the arrow X ₁₆ direction by a torsion spring 151. Thereby, the support arm 14
2 is a state of being retracted from the figure X ₁₄ direction is rotated in the cassette main assembly 2 by the torsion spring 151.

Next, the eject mechanism 160 of the tape cassette 1 of the recording and / or reproducing apparatus 30 will be described in detail with reference to the drawings. The eject mechanism 160 is provided on the side of the mechanical chassis 64 that constitutes the recording / reproducing unit 53. This ejection mechanism 160 is provided in FIGS.
As shown in, a slide member 163 which slides the lock claw 162 to lock for locking the engaging piece 161 provided on the side the cassette holder 54 is provided 22 in the arrow X ₁₇ direction of the arrow X ₁₈ direction, This slide member 16
And a rotation member 164 for restricting the sliding operation of the third member.

The slide member 163 is provided with an elongated guide hole 165 in the lateral direction. A support pin 166 is inserted into the guide hole 165, and is attached to a rising wall (not shown), which stands on the mechanical chassis 64 and constitutes a mounting wall of the eject mechanism 160, and guides the sliding operation of the slide member 163. Further, a locking piece 167 is provided on the upper side of the slide member 163 so as to be bent, and abuts on the rotating member 164.

[0077] Further, the rotating member 164 has one end in FIG. 22 to the rising wall (not shown) provided on the mechanical chassis 64 arrow X ₁₉ direction, mounted rotatably in the arrow X ₂₀ direction I have. The rotating member 164 has an upper edge formed with a two-step staircase at its upper edge. The stopper 168 is formed by rising from the first side to the second side, and is adjacent to the stopper 168. A horizontal portion 169 formed in the horizontal direction is configured. These stoppers 1
The locking piece 167 of the slide member 163 abuts on the 68 and the horizontal portion 169. In addition, this rotating member 164 includes
Pressing portion 17 formed by bending in the horizontal direction at the other end
1 is formed. The pressing portion 161 is pressed by the engaging piece 161 provided on the side the cassette holder 54 to rotate the rotating member 164 in the arrow X ₁₉ direction. Further, a locking portion 172 is formed on one end of the rotating member 164. A coil-shaped contraction spring 173 is locked to the locking portion 172. The other end of the contraction spring 173 is locked by a locking portion 174 formed on the slide member 163. Therefore, the contraction spring 173 urges the slide member 163 in the arrow X ₁₈ direction urges the pivot member 163 in the arrow X ₂₀ direction.

The ejection mechanism 160 is in a state where recording and / or reproduction of the magnetic tape 3 in the mode 2 and the mode 3 is not performed, that is, only in the mode 2 and the mode 3, the recording / reproducing unit 53 of the tape cassette 1 The operation of taking out is enabled.

When the cassette holder 54 closes the recording / reproducing unit 53, the eject mechanism 160
As shown in FIG. 23, in a state where the pressing portion 171 is rotated to the pressed in a state in Figure 22 the arrow X ₁₉ direction engaging piece 161 of the cassette holder 54 side of the rotary member 164. The locking piece 161 of the cassette holder 54 is
The contractile force of the 73 are in a state of being slid in the arrow X ₁₈ direction. Further, since the rotating member 164 is in a state of being rotated in the arrow X ₁₉ direction, the engaging piece 167 of the slide member 163 is in contact state to the horizontal portion 169 of the rotating member 164. Furthermore, the locking pawl 162 of the slide member 163, slide member 163 is slid in the arrow X ₁₈ direction. Therefore, the cassette holder 54
The locking piece 161 is locked by the lock claw 162.

Further, the cassette holder 54 is
In the state where the cover 3 is opened, the ejection mechanism 160
Is in a state as shown in FIGS. 21 and 22. That is, when the lock release knob 39 shown in FIG. 2 is slid, the slide member 163 is moved by an arrow X _{17 in the} figure through a link mechanism (not shown) connected to the slide member 163.
Slide in the direction. Then, the locked state of the locking piece 161 and the lock claw 162 on the cassette holder 54 side is released, and the cassette holder 54 is rotated upward in the drawing. At this time, the engaging piece 167 of the slide member 163 by the whole is slid in the arrow X ₁₇ direction, it would be slid from the horizontal portion 169 of the rotating member 164 to one step lower horizontal portion, the stopper portion 168. This stopper 16
8 prevents sliding operation of the slide member 163 is biased in the drawing the arrow X ₁₈ direction by contraction spring 173. As a result, the cassette holder 54 is
When the cover is opened, the tape cassette 1 can be inserted and removed.

Next, the relationship between the magnetic heads 61 and 62, the pinch roller 63, and the eject mechanism 160 will be described. A link mechanism 180 that links the magnetic heads 61 and 62 and the pinch roller 63 with the ejection mechanism 160
As shown in FIG. 21, a connection arm 181 for connecting the mode switching slider 101 and the slide member 163 of the eject mechanism 160, and a rotating cam member 182 for moving the magnetic heads 61 and 62 up and down are provided.

The connecting arm 181 has a support shaft 183 provided at one end thereof. The support shaft 183 is connected to the slide member 16 of the eject mechanism 160.
3 so as to be rotatable.
The connection arm 181 is inserted into a support shaft 185 erected on the mechanical chassis 64 at an intermediate position thereof, and serves as a rotation fulcrum. Therefore, this connection arm 181 is
When the slide member 163 is slid in the arrow X ₁₇ direction is rotated in the arrow X ₂₀ direction, when the sliding member 163 is slid in the arrow X ₁₈ direction is rotated in the arrow X ₂₁ direction Will be. On the other hand, a substantially rectangular guide hole 186 is provided at the other end of the connection arm 181. A support shaft 187 provided on the rotating cam member 182 is fitted into the guide hole 186. A curved portion 190 is formed on the connection arm 181 at a position crossing the mode switching slider 101.

The rotation cam member 182 is rotated about a support shaft 188 erected on the front side of the mechanical chassis 64 as a rotation fulcrum. That is, the slide member 163 is moved to the arrow X ₁₇
Connecting arm 181 by being slid in the direction is rotated in the arrow X ₂₀ direction, rotating cam member 182 is rotated in the arrow X ₂₂ direction. The connection arm 181 by the slide member 163 is slid in the arrow X ₁₈ direction is rotated in the arrow X ₂₁ direction, rotating cam member 182 is rotated in the arrow X ₂₃ direction. On one end side of the rotating cam member 182,
An arm 189 is provided. This arm part 189
Is provided with a cam surface 191 on its upper surface. A boss 192 provided on the magnetic head support arm 119 of the magnetic head 61 and a boss 193 provided on the magnetic head support arm 119 of the magnetic head 62 abut on the cam surface 191. Further, a protruding piece 194 provided on the support arm 142 of the pinch roller 63 abuts. Further, a locking piece 195 is provided at the tip of the arm portion 189 by bending. The locking piece 195 is locked to a boss 196 provided on the mode switching slider 101.

The link mechanism 180 includes a reverse magnetic head 61 used when the magnetic tape 3 runs in the reverse rotation direction, and the pinch roller 63 having the recording / reproducing opening 7 and the pinch roller opening 8 of the tape cassette 1. In the state of mode 1 in which the tape cassette 1 has entered the cassette main body 2, ejection from the recording / reproducing unit 53 of the tape cassette 1 is prohibited. That is, as shown in FIG.
It is, as described above, in a state where the slide member 163 is slid in the arrow X ₁₈ direction, and prohibits the lid opening operation of the cassette holder 54 in a state in which the engaging piece 161 and the locking claw 162 of the cassette holder 54 is locked ing. In this case, the connection arm 181 which is connected to the slide member 163 is rotated in the arrow X ₂₁ direction arrow rotating cam member 182 X
It is in a state of turning in ₂₃ directions. On the other hand, the mode switching slider 101 is in the mode 1 state by the rotation of the cam gear 73 as described above. At this time, the locking piece 195 of the rotating cam member 182 and the boss 196 of the mode switching slider 101 are in a state of being abutted. Thus, rotating cam member 182, when an attempt is rotated in the arrow X ₂₂ direction, the engaging piece 195 mode switch actuator 1
Since 01 of the boss 196 are abutted, the arrow X ₂₂ direction of the rotating operation is prevented. That is, the ejector will be sliding member 163 of the eject mechanism 160 is a slide is blocked in the arrow X ₁₇ direction is prohibited.

The link mechanism 180 is connected to the magnetic head 6.
In the state of mode 2 in which the tape cartridges 1 and 62 and the pinch roller 63 are retracted from the inside of the cassette body 2, the tape cassette 1 can be ejected from the recording / reproducing unit 53. That is,
As shown in FIG. 24, in the state of the mode 2, in a state where the mode switch actuator 101 is slid in the arrow X ₄ direction from the state of the mode 1. Therefore, the locking piece 195 of the rotating cam member 182 is
Is not in contact with the boss 196. The rotating cam member 182 is in a state of possible rotation of the arrow X ₂₂ direction. Therefore, the connection arm 18
1 is slid in the arrow X ₁₇ direction for performing release the locking state between the locking piece 161 of the slide member 163 lock claw 162 and the cassette holder 54 of the eject mechanism 160 eject, times in the arrow X ₂₀ direction dynamic and to rotate the rotating cam member 182 in the arrow X ₂₂ direction. Then, in the rotating cam member 182, the cam surface 171 of the arm portion 189 raises the bosses 192 and 193 and the projecting piece 194. As a result, the magnetic heads 61 and 62 and the pinch roller 63 can be further retracted, and the ejection can be performed.

Further, the link mechanism 180 includes a forward rotation magnetic head 6 used when the magnetic tape 3 travels in the forward rotation direction.
2 and the mode 4 in which the pinch roller 63 enters the cassette main body 2 through the recording / reproducing opening 6 and the pinch roller opening 8 of the tape cassette 1, the ejection from the recording / reproducing section 53 of the tape cassette 1 is stopped. Ban. That is, as shown in FIG. 25, in the state of the mode 4, in a state where the mode switch actuator 101 is slid further arrow X ₄ direction from the state of the mode 2. And
The connection arm 181 is in a state where its curved portion 190 is abutted against the boss 196 of the mode switching slider 101.
Further, the eject mechanism 160, as described above, in a state where the slide member 163 is slid in the arrow X ₁₈ direction, the engaging piece 161 and the locking pawl 16 of the cassette holder 54
In the state in which the cassette 2 is locked, the operation of opening the cassette holder 54 is prohibited. In this case, the connection arm 181 which is connected to the slide member 163 is rotated in the arrow X ₂₁ direction,
Rotating cam member 182 is in a state of being rotated in the arrow X ₂₃ direction. Therefore, the connection arm 181, when the slide member 163 of the eject mechanism 160 is slid in the arrow X ₁₇ direction for lid opening operation of the cassette holder 54, the connecting arm 181 tries to rotate in the arrow X ₂₀ direction,
This operation is prevented because the bent portion 190 is abutted against the boss 196 of the mode switching slider 101. As a result, the ejection is prohibited.

Further, in the link mechanism 180, the magnetic heads 61 and 62 and the pinch roller 63
In the state of mode 3 evacuated from the inside, the tape cassette 1
Eject from the recording / reproducing unit 53 is enabled. That is, as shown in FIG. 26, in the state of the mode 3, in a state where the mode switch actuator 101 is slid in the arrow X ₃ direction from the state of the mode 3. Therefore, the locking piece 195 of the rotating cam member 182 is not in contact with the boss 196 of the mode switching slider 101. The rotating cam member 182 is in a state of possible rotation of the arrow X ₂₂ direction. Therefore, the connecting arm 181 is connected to the sliding member 1 of the eject mechanism 160.
63 is the locking claw 162 and the locking piece 1 of the cassette holder 54
Arrow X to release the locked state with 61 and perform ejection
₁₇ is slid in the direction, and rotated in the arrow X ₂₀ direction to rotate the rotating cam member 182 in the arrow X ₂₂ direction. Then, the rotating cam member 182 is connected to the cam surface 1 of the arm portion 189.
71 lifts the bosses 192, 193 and the projection 194. As a result, the magnetic heads 61 and 62 and the pinch roller 63 can be further retracted, and the ejection can be performed.

The recording and / or reproducing apparatus 30 as described above
Has a separate mode switching motor 65 in addition to the drive motor 132 for driving the magnetic tape 3. The mode switching motor 65 operates the mode switching mechanism by rotating the cam gear 73 to raise and lower the magnetic heads 61 and 62 and the pinch roller 63, and to select the reel shaft rotating gears 107 and 108. Switching to mode 1 to mode 4 is performed. As described above, the recording and / or reproducing apparatus 30 includes the drive motor 132
And a mode switching motor 65 are provided, each of which plays a role for running the magnetic tape 3 and for switching the mode. Therefore, in the recording and / or reproducing apparatus 30, the configuration of the mode switching mechanism can be simplified and the size of the entire apparatus can be reduced.

In the recording and / or reproducing apparatus 30, the eject mechanism 160 and the mode switching slider 101 are linked, and the recording and / or reproducing of the magnetic tape 3 in the mode 2 and the mode 3 is not performed, that is, It is possible to take out the tape cassette 1 from the recording / reproducing unit 53 only in mode 2 and mode 3. Therefore, since the recording and / or reproducing apparatus 30 does not eject the tape cassette 1 in the mode 1 and the mode 4, the operation of forcibly removing the tape cassette 1 in this state is prevented, and the magnetic head 61, Damage to the pin 62 and the pinch roller 63 can be prevented. In addition, the eject mechanism 160 is connected to the link mechanism 1.
By linking to the mode switching slider 101 via 80, the configuration can be simplified and downsized.

Further, the recording and / or reproducing device 30
The position detection switch 81 detects the positions of the magnetic heads 61 and 62 and the pinch roller 63 in each mode. As described above, the position detection switch 81 is directly attached to the cam gear 73 and is configured to be thin, so that the space efficiency of the device can be improved and the size of the entire device can be reduced. Further, since the position detection switch 81 is directly attached to the cam gear 73, the positions of the magnetic heads 61 and 62 and the pinch roller 63 in each mode can be accurately detected.

Next, an operation control circuit of the recording and / or reproducing apparatus 30 will be described. FIG. 27 is a block diagram showing a control circuit of the recording and / or reproducing device 30.

The recording and / or reproducing apparatus 30 has a microcontroller 201 having an analog / digital converter 201a therein and a K connected to each operation input switch.
An EY input circuit 202, a drive motor servo circuit 203 for driving a drive motor 132 for rotating the tape reels 4 and 5 of the tape cassette 1 and running the magnetic tape 3, a brake driver 204, and a mode switching for driving a mode switching motor 65. It includes a motor drive circuit 205, a mode switching motor brake circuit 206, and a position detection switch 81.

The microcontroller 201 comprises, for example, a so-called central processing unit (CPU), and a commercially available IC
(Integrated Circuit). The microcontroller 201 has a memory for storing a predetermined processing program. Microcontroller 20
1 controls each electronic circuit included in the recording and / or reproducing apparatus 30 based on the processing program.

The microcontroller 201
Is an analog / digital converter that converts analog signals to digital signals.
It has a digital converter 201a. The analog / digital converter 201a has a KEY input circuit 20 described later.
2 is input. The analog / digital converter 201a is connected to the KEY input circuit 20.
2 is detected and converted into digital data. The microcontroller 201 performs processing and control based on this data.

The KEY input circuit 202 includes operation buttons provided on the main body 33 and the cover 34, such as a record button 36, a pause button 37, a rewind button 46, a fast forward button 47, a stop button 48, and a play button 49. Is supplied. When these operation input buttons are pressed, an ON signal is supplied to the KEY input circuit 202. The KEY input circuit 202 converts the ON signal from each operation input button into an analog signal having a different weight, and supplies the analog signal to the analog / digital converter 201a of the microcontroller 201. That is, the KEY input circuit 202 outputs a current value to each switch in a predetermined step unit using, for example, an R-2R ladder circuit of a resistor or the like, converts the current value to a voltage value, and outputs the current value to the analog / digital converter 201a. It is like supplying.

The signals from the operation input buttons may be supplied directly to the digital input terminals of the microcontroller 201 without using the key input circuit 202.

The drive motor servo circuit 203 supplies a drive current to a drive motor 132 for rotating the reel shafts 55 and 56 for driving the magnetic tape 3 stored in the tape cassette 1 and the capstan shaft 59 and the like. is there. The drive motor servo circuit 203 is controlled by the microcontroller 201. The microcontroller 201 sends, for example, a motor ON / OFF control signal to the drive motor servo circuit 203,
It supplies a control signal for the rotation direction of the motor, a control signal for the speed of the motor, and the like. The drive motor servo circuit 203 turns ON / OFF the drive motor 132 in response to these control signals, varies the rotation speed of the drive motor 132 differently in fast-forward, reproduction, and the like, and changes the drive motor 132 different in the reproduction direction. 132 is switched.

The drive motor servo circuit 203
Is an FG (frepuency genera) that detects the number of rotations of the motor.
ter) and a servo control circuit using a back electromotive force detection circuit of the motor. Therefore, the drive motor servo circuit 203 makes the rotation speed of the drive motor 132 constant to perform stable control.

The brake driver 204 includes the drive motor 1
When the drive motor 32 is not driven, that is, when the drive current is not supplied from the drive motor servo circuit 203 to the drive motor 132, both ends of the drive coil are short-circuited. For example, when the drive motor 132 stops driving from the drive state, the brake driver 204 can stop the operation sharply by short-circuiting both ends of the coil.

The drive motor 132 is connected to the reel shafts 55 and 56.
Then, the capstan shaft 59 is driven to move the magnetic tape 3. The drive motor 132 includes a flywheel 130,
Main gear 117, main gear 114 and driven gear 11
The magnetic tape 3 is caused to travel by transmitting a rotation operation to a drive mechanism constituted by gears such as 5, 116 and the like. The operating position of the drive mechanism moves in each mode of the recording and / or reproducing apparatus 30, that is, from mode 1 to mode 4.
The position of this operation position is controlled by a mode switching mechanism such as the cam gear 73 driven by the mode switching motor 65, the mode switching slider 101, and the rotating base 111. In particular, in the recording and / or reproducing apparatus 30, the main gear 1
By switching the gear 17, the driving gear 114, and the driven gears 115 and 116 to operating positions corresponding to the respective modes, these gears mesh with the flywheel gear 110 to which the drive is transmitted from the drive motor 132.

A mode switching motor driving circuit 205 supplies a driving current to a mode switching motor 65 for switching the operating position of the above-mentioned driving mechanism and for switching the operating positions of the magnetic heads 61, 61 and the pinch roller 63. Circuit. This mode switching motor drive circuit 20
Numeral 5 is controlled by a PWM signal from the microcontroller 201 to stably control the mode switching motor 65. For example, the mode switching motor drive circuit 205
When a playback button 49 provided on the cover 34 of the recording and / or playback device 30 is pressed, the microcontroller 2
01 supplies a PWM control signal, and drives the mode switching motor 65 based on this control signal.

The mode switching motor brake circuit 206
When the mode switching motor 65 is not driven, that is,
This is a circuit for short-circuiting both ends of the coil of the mode switching motor 65 when a driving current is not supplied from the mode switching motor driving circuit 205 to the mode switching motor 65. For example, when the mode switching motor 65 stops driving from the driving state, the mode switching motor brake circuit 206 short-circuits both ends of the coil, whereby the operation can be stopped sharply.

The mode switching motor 65 is driven and controlled by the mode switching motor drive circuit 205 and the mode switching motor brake circuit 206 as described above. The mode switching motor 65 switches the operating position of the above-described driving mechanism via the mode switching mechanism such as the cam gear 73, the mode switching slider 101, and the rotating base 111 as described above. Switch the operating position of the roller.

The position detecting switch 81 is a switch for detecting the operating position of the driving mechanism. For example, the position detection switch 81 detects the rotational position of the cam gear 73 driven by the above-described mode switching motor 65, and supplies a detection signal to the microcontroller 201. The recording and / or reproducing apparatus 30 moves the operating position of the driving mechanism in four modes from mode 1 to mode 4. The position detection switch 81 detects which of the modes 1 to 4 the drive mechanism is in, and supplies the detection signal to the microcontroller 201.

Next, the above-mentioned microcontroller 2
01 will be described below with reference to the flowchart shown in FIG.

When the microcontroller 201 drives the mode switching motor 65 to switch the mode,
For example, the main gear 117 and the reel shaft rotating gear 107,
108 and the driven gear 1
When the mode cannot be switched, for example, when the gears 15 and 116 and the reel rotating gears 107 and 108 touch each other, the following steps S1 to S10 are performed to switch the mode. The process from step S1 to step S2 described below is a normal control process performed when the microcontroller 201 has no problem in the mode switching operation, and the mode switching from step S3 to step S10 is performed. This is a retry control process performed when a problem occurs in the operation.

The microcontroller 201 starts processing from step S1 when the recording button 36, the pause button 37, the rewind button 46, the fast forward button 47, the stop button 48, and the play button 49 are pressed. I do.

In step S1, the microcontroller 201 drives the mode switching motor 65 to switch the mode of the driving mechanism based on the operation input.

When the mode switching motor 65 is driven in step S1, the microcontroller 201 detects the position of the mode of the driving mechanism by the position detection switch 81. When detecting the position of the mode based on the operation input, the microcontroller 201 stops driving the mode switching motor 65 and ends the mode switching process. The recording and / or reproducing apparatus 30 includes the microcontroller 20.
After the switching of the mode is completed, the drive motor 132 drives the drive motor 132 to start operations such as reproduction.

If the microcontroller 201 cannot detect the position of the mode within the predetermined time in step S2,
The retry control process from step S3 is started. In other words, the fact that the mode is not switched after the elapse of the predetermined time means that there is some problem in the mode switching mechanism, for example, a problem that the gears to be meshed cause tooth contact and the mode cannot be switched. It is. The microcontroller 201 starts retry control from step S3 to avoid this state. Here, the predetermined time until the retry control process is started is set in advance in consideration of the time required for the recording and / or reproducing device 30 to perform the mode switching process.

In step S3, the microcontroller 201 stops driving the mode switching motor 65.

When the driving of the mode switching motor 65 is stopped, in step S4, the microcontroller 201 is stopped.
Searches for the rotation direction of the drive motor 132. This rotation direction is a direction in which the magnetic tape 3 of the tape cassette 1 is wound around the tape reel 4 or 5 when the drive motor 132 is driven after this mode switching. That is, when the drive motor 132 is driven in step S5 described later, the microcontroller 201 searches for a direction in which the magnetic tape 3 does not slack even if the gears mesh.

When the search of the rotation direction is completed, step S5
, The microcontroller has a drive motor 132
Is driven in the rotation direction searched in step S4 for a predetermined time, for example, 100 msec. In this step S5,
By driving the drive motor 132, if, for example, a tooth contact occurs and the mode cannot be switched, the contact can be avoided.

After driving the drive motor 132 for a predetermined time, in step S6, the microcontroller 201
Stops the drive motor 132. Specifically, a brake signal is supplied to the brake driver 204 for a predetermined time.
This time is, for example, 250 ms.

When the supply of the brake signal to the brake driver 204 is completed, the microcontroller 201 drives the mode switching motor 65 again in step S7.

Then, in step S8, the microcontroller 201 detects the position of the drive mechanism mode by the position detection switch 81. When detecting the position of the mode based on the operation input, the microcontroller 201 stops driving the mode switching motor 65 and ends the mode switching process. Recording and / or playback device 3
In the case of 0, after the microcontroller 201 ends this mode switching process, the drive motor 132 is driven to start operations such as reproduction.

In this step S8, if the microcontroller 201 cannot detect the position of the mode within a predetermined time, it repeats the retry control processing from step S3.

The microcontroller 201 performs the processing from step S1 to step S8, and sends the control signal at the timing of the timing chart shown in FIG. 29 to the drive motor servo circuit 203 and the brake driver 20.
4, supply to the mode switching motor drive circuit 205 and the mode switching motor brake circuit 206.

In step S9, the microcontroller 201 determines whether this retry control process has been repeated three times. If the mode cannot be switched after repeating the retry control process three times, the process proceeds from step S9 to step S10, and in step S10, a process of giving up the mode switching is performed. This mode switching abandonment process, for example, sends a beep,
An indication that the mode cannot be switched is displayed on a liquid crystal display panel or the like, and the process is terminated.

Therefore, the microcontroller 201
In step S2, if the mode position cannot be detected within a predetermined time due to, for example, gear contact, a retry control process from step S3 is started. Then, by driving the drive motor 132 in step S5 and driving the mode switching motor 65 again in step S7, the tooth contact can be avoided.

As described above, the recording and / or reproducing apparatus 3
In the case of 0, the microcontroller 201 performs the above-described retry control processing, so that failure of mode switching due to gear contact at the time of mode switching can be avoided, and mode switching can be ensured. Therefore, in the recording and / or reproducing apparatus 30, operability can be improved. In addition, since the failure of the mode switching can be avoided, the gear is not held in the tooth contact state, and the mode switching motor 65 is not overloaded. Further, the control unit automatically performs the retry control process, so that the failure of the mode switching can be quickly avoided.

As described above, about a quarter of a normal tape cassette is used.
The recording and / or reproducing apparatus 30 for a tape cassette having the size of the tape cassette has been described in detail. However, the present invention is not limited to this. The present invention may be applied to a recording and / or reproducing device having the same. Also, a mode for switching the operation of a recording medium loading mechanism of a disk cartridge in which a disk-shaped recording medium such as an optical disk or a magneto-optical disk is rotatably stored and / or a plurality of driving mechanisms of a recording / reproducing apparatus. A device having a switching mechanism may be used.

[0123]

In the drive mechanism switching device according to the present invention, if the operation direction of the drive mechanism cannot be switched after a certain period of time after the operating position of the gears constituting the drive mechanism has been moved, the drive mechanism is switched. , The operating position of the gear is moved again to switch the operating direction of the drive mechanism. As a result, in the drive mechanism switching device, it is possible to avoid failure due to gear contact when switching the operation direction of the drive mechanism, and it is possible to reliably switch the operation direction of the drive mechanism. Therefore, in this drive mechanism switching device, operability can be improved. In addition, by being able to avoid the failure of switching the operation direction,
The gear is not held in contact with the teeth, and the mode switching motor is not overloaded.

Further, in the tape cassette recording and / or reproducing apparatus according to the present invention, the operating position of the gear constituting the drive mechanism for running the magnetic tape accommodated in the tape cassette is moved, and even if a certain time has elapsed. If the operation direction of the drive mechanism cannot be switched, after the drive mechanism is driven, the operation position of the gear is moved again to switch the operation direction of the drive mechanism. As a result, in this tape cassette recording and / or reproducing apparatus, it is possible to avoid a failure due to gear contact when switching the operation direction of the drive mechanism, and to ensure the switching of the operation direction of the drive mechanism. I can do it. Therefore, in the tape cassette recording and / or reproducing apparatus, operability can be improved. In addition, since the failure of switching the operation direction can be avoided, the gear is not held in the tooth contact state, and the mode switching motor is not overloaded.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a tape cassette.

FIG. 2 is an overall perspective view of a recording and / or reproducing apparatus described in an embodiment.

FIG. 3 is an overall perspective view of a mechanical chassis and a cassette holder.

FIG. 4 is a view for explaining states of a magnetic head and a pinch roller in four modes of the recording and / or reproducing apparatus.

FIG. 5 is a plan view for explaining a drive system provided in the mechanical chassis.

FIG. 6 is a plan view for explaining a first cam groove and a second cam groove provided in the cam gear.

FIG. 7 is a cross-sectional view for explaining a mounting state of a detection switch mounted on a cam gear.

FIG. 8 is a plan view for explaining a fixed contact portion provided on a base of the detection switch.

FIG. 9 is a perspective view for explaining terminals provided on a rotating body of the detection switch.

FIG. 10 is a plan view of a detection switch.

FIG. 11 is a plan view for explaining a mounting state of a magnetic head.

FIG. 12 is a side view for explaining a mounting state of the magnetic head.

FIG. 13 is a main part side view for describing a state in which the magnetic head support arm is supported by the mechanical chassis.

FIG. 14 is a plan view for explaining the relationship between the magnetic head and its drive system in mode 1.

FIG. 15 is a plan view for explaining the relationship between the magnetic head and its drive system in mode 2.

FIG. 16 is a plan view for explaining the relationship between the magnetic head and its drive system in mode 4.

FIG. 17 is a plan view for explaining the relationship between the magnetic head and its drive system in mode 3.

FIG. 18 is a plan view for explaining a support mechanism of a pinch roller.

FIG. 19 is a plan view for explaining a position of a pinch roller in a mode 2 state.

FIG. 20 is a plan view for explaining a position of a pinch roller in a mode 4 state.

FIG. 21 is a plan view for explaining an eject mechanism, an eject mechanism 160, and a link mechanism of a support arm for a magnetic head in a mode 1 state.

FIG. 22 is a plan view of an eject mechanism for explaining a state where the cassette holder is opened.

FIG. 23 is a plan view of an eject mechanism for explaining a state where the cassette holder is closed.

FIG. 24 is a plan view for explaining states of an eject mechanism and a link mechanism in a state of mode 2;

FIG. 25 is a plan view for explaining states of an eject mechanism and a link mechanism in a state of mode 3;

FIG. 26 is a view for explaining states of an eject mechanism and a link mechanism in a state of mode 3;

FIG. 27 is a block diagram of a control circuit of a recording and / or reproducing apparatus described in the embodiment.

FIG. 28 is a flowchart showing control contents of a microcontroller.

FIG. 29 is a timing chart of control signals supplied from the microcontroller to the mode switching motor and the drive motor.

FIG. 30 is an overall perspective view of a conventional recording and / or reproducing apparatus.

FIG. 31 is a plan view for explaining a conventional mode switching mechanism.

FIG. 32 is a plan view for explaining a conventional mode switching mechanism.

FIG. 33 is an enlarged view of a main part for explaining that gear teeth are in contact with the conventional mode switching mechanism.

[Explanation of symbols]

Reference Signs List 30 recording and / or reproducing device, 65 mode switching motor, 73 cam gear, 81 detection switch, 101
Mode switching slider, 107, 108 reel shaft rotating gear, 110 flywheel gear, 111 rotating base,
114 Drive gear, 115, 116 Drive gear, main gear 117, 132 Drive motor, 201 Microcontroller, 203 Drive motor servo circuit, 205
Mode switching motor drive circuit

Claims (2)

[Claims] 1. A drive mechanism switching device having a mode switching mechanism for switching an operation direction of a drive mechanism by moving an operation position of a gear constituting the drive mechanism, comprising: a drive motor for driving the drive mechanism; A mode switching motor that drives a mode switching mechanism that switches an operating direction of the driving mechanism by moving an operating position of a gear that constitutes the driving mechanism; and detects an operating position of a gear that constitutes the driving mechanism. A position detection switch for supplying a control signal to the drive motor to control the drive mechanism, and a control signal to the mode switching motor to control the operating position of a gear constituting the drive mechanism. The control unit supplies a control signal to the mode switching motor to move a gear constituting a driving mechanism to a predetermined operation position. After a certain period of time, the predetermined position of the gear is detected by the position detection switch. If the predetermined position of the gear cannot be detected, a control signal is supplied to the drive motor to drive the drive mechanism, and A drive mechanism switching device for supplying a control signal to a mode switching motor to move a gear constituting the drive mechanism to a predetermined operation position. 2. A recording and / or recording apparatus for a tape cassette having a mode switching mechanism for moving an operating position of a gear constituting a driving mechanism for running a magnetic tape stored in the tape cassette to switch the operating direction of the driving mechanism. In the playback device, a drive motor that drives a drive mechanism that runs a magnetic tape stored in the tape cassette, and an operating position of a gear that constitutes the drive mechanism is moved.
A mode switching motor that drives a mode switching mechanism that switches the operation direction of the driving mechanism; a position detection switch that detects an operating position of a gear that constitutes the driving mechanism; A control unit for controlling the running of the magnetic tape stored in the cassette, and for supplying a control signal to the mode switching motor to control the operating position of a gear constituting the drive mechanism; A control signal is supplied to the mode switching motor in order to move a gear constituting a drive mechanism to a predetermined operation position, and after a predetermined time has elapsed, a predetermined operation position of the gear is detected by the position detection switch. When the predetermined operating position of the gear cannot be detected, the control signal is supplied to the drive motor to drive the drive mechanism, and the control signal is again transmitted to the mode switching motor. Recording and / or reproducing apparatus for a tape cassette and moving the gear feeding to constitute a driving mechanism at a predetermined operation position.