JPS5829162A - Operating switching mechanism for tape recorder - Google Patents

Abstract

PURPOSE:To simply switch each operation, by controlling a rotational angle through the changeover of each operation with one motor. CONSTITUTION:One pulse signal is generated and rotation of a cam drive motor 27 is stopped through a reflection plate 26b at a nonreflection section 24c. At the stop state, the position of the plate 24b to a detecting element 26 opposes to the nonreflection section with two light emitting elements. In inputting a signal of a fast feed or rewinding, the cam drive motor 27 is rotated and a position detecting plate 24 is turned. Through this rotation, the cam 24a depresses a roller 15 provided for a brake link 14. Further, through the rotation of the plate 24, the plate 24b corresponding to the detecting element 26 is also turned.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) The present invention relates to an operation mode switching mechanism of a tape recorder, particularly an electronic one. The present invention relates to an operation switching mechanism when used as a control method.

Conventionally, this type of device has been equipped with a large number of solenoids corresponding to each operation, and these solenoids are combined with link levers, etc. to turn the solenoids ON and OFF to fast-forward, zero-rewind, or rewind the tape recorder.

However, with this one, the solenoids corresponding to each operation mode must remain in the 01J state during operation, and for this reason Power is required to continue operation, resulting in high power consumption.

In particular, it had the disadvantage that it could not be used with any portable equipment such as battery-powered radio cassettes.

When the solenoid is suctioned, a large impact sound is generated, which is unpleasant to the senses, and it requires many parts, making the operation complicated and expensive.

This invention was developed to improve the drawbacks of the conventional one, and it is possible to easily switch each operation by using one motor to switch each operation and control the zero rotation angle (2) I was able to do it. The present invention is intended to provide an operation switching mechanism for a tape recorder that links this rotational angle change with the brake to perform the braking operation at a quick timing.

An embodiment of the tape recorder operation switching mechanism of the present invention will be described below with reference to the drawings.

In Figures 1 to 8, (1) is the base body, (21, (
Reference numeral 31 denotes a take-up reel stand and a supply reel stand which are rotatable by being inserted into a shaft implanted in the base body, and CIl+ is a motor holding plate, which is attached parallel to the back surface of the base body (1) at a constant interval. has been done. (4) is this motor holding plate (
The driving force of the capstan motor (2) is transmitted to the belt (2) via the flywheel (2), and the magnetic tape (not shown) is attached to the magnetic tape (not shown).
run at a constant speed. (The roller is a pinch roller, and is fitted onto a shaft (1g) implanted in the base body (1), allowing zero rotation.

(7) is the head board, recording/reproducing head (8), erasing head (
9) is mounted on the base body (11), and guide grooves (7a) and (7b) provided in a part of this head base plate guide the guide bins (3) (le) and (If) implanted in the base body (11). 1 is attached so as to be slidable on the base body 0) in the vertical direction as shown in the drawing.

(6) The pinch roller press spring constantly rotates the pinch roller (5) clockwise, that is, biases it toward the capstan shaft (4). (7c) is against this pinch roller pressure spring (6).

The stoppers, ae, and aυ that hold the pinch roller (5) in place are leaf springs for holding the head board.

The head substrate (1) is attached to the base (1) as shown in the figure.
7) are arranged on both sides of the head board (7) whole base +1
At the same time, the head substrate (7) is held on the base (1).
OQ3, which serves as a guide when moving in parallel on the base body (1), is a head board return spring, and tJ41 is a brake link, which can freely slide in the vertical direction in the drawing on the top surface of the base body (1), and one end of the brake link. and the above head board (
7) is tension-connected by the head substrate drive spring Ql and slides with the head substrate (7), and when it is in a stopped state, the brake rubber portion (14a) provided in a part thereof slides as the head substrate (7) slides.
, (14b) are in contact with the above-mentioned winding (4) take-up reel stand C2) and supply reel stand (3) to prevent rotation. The brocade is a roller that is integrated with the brake link. The shaft is fixed to the rotating shaft of the first motor attached to the motor holding plate (2). The fin is a take-up idler, which is freely rotatable in relation to the motor pulley described in Jc.
) and applies the rotational force of the reel motor (to) to the reel stand.As shown in Figure 2, the reel motor (
It is composed of a clutch mechanism that freely moves in the L direction and R direction depending on the rotation direction of 2). The brocade is a cassette holding lever, and the cassette holding part (l
A cassette (not shown) is stably held together with a), (lb), (lc), and (Id). 0. (2) is a spring that biases the cassette holding lever in a direction to press and hold the cassette. (Foundation) is a cam drive motor, which is attached to the motor holding plate (2).

A cam drive gear is formed on the rotating shaft.

(to), gear A and gear B are meshed with each other (5), and gear A is meshed with the cam drive gear ati of the cam drive motor. (Incorporated) is a position detection plate which is rotatable with the substrate (11), and forms a gear part (24, 1) on the outer periphery that engages with the gear B (to), and from this engagement K, the cam Drive gear an, gear A
(2) It is decelerated by gear B (to) and receives the rotational force of the cam drive motor. (24a) is a cam part provided on one side of this position detection plate @.
a) is in contact with the roller aS provided on the brake link a4 connected to the head board (7) [71 position detection plate receives the rotational force of the cam drive motor and rotates] In particular, due to the displacement of the cam part from the center of rotation,
The head substrate (7) and the brake 1) are slid in the vertical direction in the drawing. (241)) is a reflecting plate provided on the opposite surface of the position detection plate to the cam portion (241L). (2) The detection element is attached to the holding part (c) on the motor holding plate mentioned above, and the reflective plate and non-reflective part of the position detection plate mentioned above (6) as shown in Figure 8. (24b), (
240), and a plurality of them are provided facing each other.

The light from this detection element is irradiated onto the reflective plate (2411) and the non-reflective portion (24) of the position detection plate (241), and when the position detection plate (9) rotates, it A pulse is generated by the non-reflective part (240) to operate a control circuit (not shown).In this embodiment, when fast forwarding or rewinding from a stop, 1 is activated.
1 pulse generation, 2 pulse generation when paused,
During recording and playback, the gear drive motor fin is controlled to rotate until three pulses are generated.

Next, it was configured like this. The operation of the operation switching mechanism of the tape recorder of this invention will be explained.

Figure 1 shows the stopped state, but at this time the position detection plate is being applied as shown in Figure 8A.

The cam part (24a) is connected to the head board (7), and the roller a9 provided on the brake 1] link fi4 is in a free state, and the head board (7) is moved as shown in FIG.
) located at the lower end of the base (1); 2. The pinch roller (5) is far away from the capstan 141, and conversely, the brake rubber part (14b) is wound up by the spring pressure of the head board return spring a. , is in pressure contact with the supply reel stand (31) and is in a stopped state.At this time, the position of the reflection plate (24b) relative to the detection element (2) and the two fluorine elements (2b) are both in the non-reflective part ( 2C) is in a position opposite to 0. When inputting a signal for fast forwarding and rewinding by 2 years from this stopped state, the cam drive motor rotates.

The position detection plate rotates in the 8th tense direction via cam drive gear Qn#, gear AJ, and gear B (c).

This rotation causes the cam part (24a) to move towards the head board (
7), press the roller a9 provided on the brake link a-, and push it upward in Fig. 1 (1, earth-edge).

As shown in Fig. 2, wind up the brake I) link a4 and
) When it passes through the reflective plate (24b) and reaches the non-reflective part (24c) 7, a one-pulse signal is generated, the control circuit is activated, and the rotation of the cam drive motor (2) is stopped.

At this time, the position detection plate (goods) and roller α9. Detection element (
2) is as shown in FIG.

Separate from the supply reel stand (3), release the brake action, and use the control circuit to turn the reel motor (2) in the counterclockwise direction (see Figure 2) for fast forwarding, and the 1-reel idler (7) is activated. The winding reel stand (3) is crimped by the clutch mechanism as shown by the dotted line, and the rotation of the reel motor (2) is transferred via the reel motor pulley α.
+1- is transmitted to the roll table (3), and the magnetic tape is put into a fast forward state. Conversely, if the reel motor (to) is rotated clockwise in the rewinding direction (see Figure 2) by the control circuit, the 1st reel idler (7) is moved by the clutch mechanism.
As shown by the dotted chain line, it is crimped to the supply reel stand (21), controls the rotation of the reel monitor (to), and controls the reel motor pulley frame (21).
9) The magnetic tape is transmitted to the supply reel stand (2) through the reel, and the magnetic tape is put into the rewinding state.During this fast forwarding and rewinding, the rotational speed of the reel motor (to) is set higher than during recording and playback. .

Next, go from stopped state to paused state.

When a temporary stop signal is input, the cam drive motor ■ rotates, the cam drive gear is turned on, and the gear hcJ gear Ba1 is turned on.
The position detection plate (goods) rotates through the.

At the time of a pause, two pulses are set to be generated, so the multi-position detection plate rotates as in the case of fast forwarding and rewinding, and the state shown in Fig. 8 (q) is reached at this time. The cam part (
Due to the displacement of Z4a), the roller (2) moves by the dimension A, and the head board (7) also moves by the head board moving spring a.
The motor (2) is prevented from rotating by the control circuit. Also, if you want to automatically select songs, in this state (1
0) Next, to change from a stopped state to a recording or playback state, input a recording or playback signal.

Cam drive motor ■ rotates, and cam drive gear a.

Position detection plate (goods) via gear arm 4 and gear B (to)
rotates. Since it is set to generate 3 pulses during recording and playback, the above-mentioned pause ↓ is further rotated, resulting in the grasping state shown in Fig. 8. At this time, the displacement of the cam part (24a) causes the roller to rotate. Move the head board (
)) is moved by the head drive spring mouth and becomes the state shown in FIG. At this time, the moving distance of the head substrate (7) is the maximum, the recording/reproducing head (8) and the erasing head (9) are in a position where they press the magnetic tape into contact, and the pinch roller (
151 is in pressure contact with the capstan (4) and rotates to run the magnetic tape.Furthermore, with the rotation of the position detection plate, the reel motor (to) also rotates counterclockwise as shown in Fig. 4 and winds the magnetic tape. The take-up idler fin is pressed against the take-up reel table (2) by the clutch mechanism and rotated. At this time, the rotation speed of the glue motor (2) is fast forward.

Set lower than rewind.

(11) Next, to change from any of the above operating states (recording, playback, pause, fast forward, rewind) to a stop state, input a stop signal, the cam drive motor rotates, and the two position detection plates (Wealth) rotates.

Due to this rotation, the position detection plate (Incorporated) is in the state shown in FIG.

This restriction is released, the head substrate is returned, and the spring force of the spring and the head substrate drive spring 0 immediately brings the stopped state shown in FIG. This timing is the same as the rotation of the position detection plate @, so that the brake rubber part (14a) s (x4b) of the brake link a4 is pressed against the take-up reel stand (21-) and the supply reel stand (31) at an early timing. It has become.

Note that in the above embodiment, each operating state is from a stopped state.

Although we have explained the switching mechanism from each operating state to the stopped state, it is of course possible to switch between each operating state, and this can be easily done by configuring the control circuit with a memory such as a microcomputer. (12) As described above, the tape recorder operation switching mechanism of the present invention is provided with a position detection plate for the movement of the head board and the brake link, and this position detection plate is operated by one motor. C,
Compared to conventional mechanisms of this type, it has fewer parts and is cheaper, and power consumption is extremely low as it only needs to be driven by the motor. No solenoids are used, so impact noise is reduced, and drive noise is quiet because there is no link mechanism. It was elegant and sensually pleasing. Furthermore, since the roller that interlocks with the cam portion of the position detection plate is formed integrally with the brake link, when the machine stops from a high speed state, the timing of applying the brake is quick and tape slack can be minimized.

[Brief explanation of drawings]

Each drawing shows an embodiment of the invention. Fig. 1 is a plan view of the stopped state, Fig. 2 is a plan view of the fast forward/rewind state, Fig. 3 is a plan view of the paused state, Fig. 4 is a plan view of the recording/playback state, and Fig. 5 is a plan view of the stopped state. The figure is a back plan view showing the interlocking relationship of gears, Figure (13) 6 is a side view, and Figure 1 is a side view of the position detection plate. FIG. 8 is a plan view showing each operating state of the position detection plate. In the figure, 0) is the base, (21 is the take-up reel stand, (3) is the supply reel stand, (7) is the head board, (1st is the brake link, a!1 is the roller part, and the slope is the position detection plate. , (24a) is the cam part, (24b) is the reflection part, as
is the detection element, and (Incorporated) is the motor.In addition, the same symbols in each figure refer to the same parts.O Agent: Makoto Kuzuno - (14)

Claims (1)

[Claims] Operation switching of a tape recorder in which the head board is slid to switch the operation to each state such as stop, fast forward, rewind, bell sound, playback, pause, etc., and also to selectively control and hold each state. In the mechanism, a brake 11 link that is linked to the head board and a cam part that comes into contact with a part of this brake link are formed on one side, and a combination of one or more detection elements is formed on the other side. A position detection plate formed with a detection part for detection is provided, and by operating this position detection plate by a motor, the brake link head board is slid by the cam part formed on the negative side, and the detection part is detected. An operation switching mechanism for a tape recorder, characterized in that the device is held in a stopped state by a stop signal.