JPH0433560Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a repeat mode in the recording operation of a tape recorder that automatically switches the continuous playback repeat mode of the reverse type tape recorder to the reciprocating recording/playback mode during the recording operation. Regarding automatic release mechanism.

[Purpose of invention]

Select and set multiple modes If a recording operation is executed in continuous playback repeat mode on a tape recorder, the recorded data will be erased and the recording will be repeated in the following order: A side → B side → A side → B side → A side → It is inconvenient to have to do so. Therefore, when recording in the continuous playback repeat mode, the recording operation state ends when the recording of side A → B side is completed, or the continuous playback repeat mode is switched to the reciprocal recording and playback mode when the recording operation starts. Therefore, the present invention proposes a mechanism for automatically canceling the repeat mode in the recording operation of a tape recorder, which has a simple structure and can automatically switch to the reciprocating recording/playback mode at the start of the recording operation.

[Structure of the idea]

The present invention includes a slidable mode switching arm that selects multiple modes, a recording operation lever that performs a recording operation, a slidable recording lever, a slidable recording switch lever, An assist cam gear that advances the head board, a change arm rotated by the assist cam gear, a recording switch pawl provided on the recording switch lever facing the sliding area of the recording lever, and the mode switching arm facing forward. When the recording operation lever is operated when the side is in the continuous playback repeat mode position, the recording lever is advanced and the recording switch pawl is rotated, and the change arm operates the recording switch via the recording switch pawl. When the lever is moved forward, the mode switching arm is moved to the reciprocating recording/reproducing mode position and the mode is automatically switched.

〔Example〕

Hereinafter, the present invention will be explained with reference to an illustrated embodiment. The automatic repeat mode release mechanism during the recording operation of a tape recorder is a mode switching arm 1 that selects and sets three modes, which are multiple modes, as shown in Figures 1 to 3.
There are a plurality of supports 1 at the left end between the chassis 10 and 11.
A is supported so as to be slidable back and forth, and a manual lever 1b is protruded from the side thereof, and a corrugated spring portion 1 is provided.
c is pressed against a pin 12 provided on the back side of the upper chassis 10. A recording lever 2 and a recording switch lever 3 are supported on the upper surface of the chassis 10 so as to be slidable back and forth, respectively, and biased toward the front side by springs 13 and 14. A recording switch (not shown) faces the front end of the recording switch lever 3, and a stepped portion 3a is provided on the side so that the recording switch lever 3 faces one support portion 1a of the mode switching arm 1.
When the mode switching arm 1 is moved forward, when it is in the first position shown in FIG. 3, which will be described later, it is moved forward to the second position shown in FIG. It is configured so that

On the front side of the recording switch lever 3, as shown in FIGS. 1 and 5, a recording switch pawl 4 is rotatably supported and biased clockwise by a spring 15. When the recording operation lever 5 is pushed down, the recording lever 2 is pushed up by the protrusion 5a, and at this time the recording lever 2
A protrusion 2a provided on the recording switch claw 4 pushes up the bent portion 4a of the recording switch claw 4 so as to rotate. A protrusion 16a at one end of the change arm 16 is arranged at the rotational position of the leg 4b of the recording switch pawl 4, so that the recording switch pawl 4 and the recording switch lever 3 are moved forward by rotation of an assist cam gear 17, which will be described later. has been done.

The mode switching arm 1 is selectively set to three mode positions as follows.

1 Manual lever 1b is in the first position as shown in Figure 3.
When the selected position is moved to the selected position, the "continuous playback repeat mode" is activated, and the release arm 6 is biased counterclockwise and toward the front by the spring 18 as shown by the two-dot chain line, and is tilted to activate the tape end detection mechanism described later. Even if the pin 7a provided on the sensor arm 7 of the sensor mechanism is moved back and forth, the pin 20 of the release lever 19 of the release mechanism is located in the vertical hole of the "shaped elongated hole 6a of the release arm 6, so that it will not be pulled up. It's getting old. The head switching mechanism is configured to be reversed when a pin 6b of the release arm 6 pushes up an arcuate surface 8a of a switching trigger 8 of the head switching mechanism, which will be described later.

2. Next, when the manual lever 1b is selectively moved to the second position in Fig. 4, the "reciprocating recording/reproducing mode" is entered, and the reverse type rotating magnetic head is brought into contact with the A side of the cassette tape (not shown), and the release arm is released at the end of the tape. Even if 6 is moved forward, pin 20
When the magnetic head is inside the vertical hole of the "shaped elongated hole 6a" and is not pulled up and is reversed so that the magnetic head corresponds to the B side by the head switching mechanism described later, the switching rotation piece 9 is moved by the switching slide plate 21. pulled to the right,
The projection 6c of the release arm 6 is pushed by the plane c of the trapezoidal part 9a of the switching rotation piece 9, and the release arm 6 is tilted clockwise, and at the end of the tape, the release arm 6 is moved forward by the pin 7a of the sensor arm 7. When the release lever 19 is released, the pin 20 enters the horizontal hole of the long hole 6a as shown by the solid line in FIG. 3, and pulls up the release lever 19 to stop its operation. At this time, even if the pin 6b pushes up the switching trigger 8 before the operation is stopped, the amount of pushing up at that time will not operate the head switching mechanism.

3. When the manual lever 1b is further selectively moved to the third position in Fig. 3, the "single-sided recording/playback mode" is entered, and the inclined surface 6d of the release arm 6 is pushed clockwise as shown by the solid line with the pin 1d of the mode switching arm 1. When the release arm 6 is moved forward by the pin 7a of the sensor arm 7 at the end of the tape on the A side or the B side, the release lever 19 is pulled up and the operation is stopped.

The pin 1d is formed on the lower side of the inner side of the mode switching arm 1, and a horizontal elongated hole 1e is formed on the side thereof. The pin 1d is connected to the side inclined surface 6 of the release arm 6.
d, and a downward pin 9b of the switching rotation piece 9 is inserted into the elongated hole 1e.

As shown in FIGS. 3, 6, and 7, the release arm 6 has an intermediate elongated hole 6e fitted into a fixed shaft 22 implanted in the chassis 11, and is supported so as to be freely movable back and forth and rotatably. A spring 18 biased counterclockwise and toward the front is hung between it and the chassis 11. An arc arm portion 6f is formed at one end of the release arm 6 on the front side of the inclined surface 6d, and the pin 6b is formed on the upper surface of the arc arm portion 6f. The projection 6c is formed on the upper surface of the inclined surface 6d and faces the trapezoidal portion 9a of the switching rotation piece 9.

The arm portion 9c of the switching rotary piece 9 is rotatably supported on the back side of the chassis 10 by a pin 23 of the switching slide plate 21 provided on the chassis 10 so as to be slidable laterally, as shown in FIG. Slope a, b on the other side
A trapezoidal portion 9a and a pin 9b having a flat surface c and a trapezoidal portion 9a are formed. Even if moved to the right side, the protrusion 6c
is not pressed.

The release lever 19 of the release mechanism is shown in FIGS.
As shown in the figure, a release plate 24 is connected to the other end, the release plate 24 is rotatably supported on a shaft 25 on the chassis 11, and the other end 24a is inserted into a hole in a locking plate 26.

In FIG. 1, a head switching plate 27 is provided on the upper surface of the chassis 10 so as to be able to swing freely by being fitted onto a shaft portion 28 installed in the chassis 10, and a head board 29 is provided so as to be slidable back and forth. is held slidably back and forth by a plurality of elongated holes, a shaft portion 28, and a plurality of support portions implanted in the chassis 10, and is prevented from coming off by a screw 30 screwed onto the shaft portion 28 and a spring plate. .

A long hole 27a is bored in the head switching plate 27.
The long pin 32 of the head switching cam gear 31 of the head switching mechanism is inserted into the elongated hole 27a, and the head switching plate 27 is reversely swung, and this reversal oscillation reverses the reverse type rotating magnetic head 33 on the head board 29. . Inverted L-shaped bent portion 27b of head switching plate 27
The other end of the switching slide plate 21 is inserted into the switching slide plate, and a long hole is bored in the switching slide plate, and the pin 27c of the head switching plate 27 is inserted into the long hole. When the switching slide plate 21 is reversed from the A side indicated by the two-dot chain line to the B side on the right side as indicated by the solid line, the switching slide plate 21 is moved to the right side and enters the above-mentioned operating state 2.

As shown in FIG. 2, the chassis 10 and 11 are held in parallel with each other at a distance by a support 34, and another chassis 35 is held below the chassis 11 in parallel and at a distance. A motor 36 is fixed to the lower side of the chassis 35, and as shown in FIG. transmitted through. On the front side of the capstan shafts 37 and 38, a supply reel stand 44 and a take-up reel stand 45 are fitted to shafts 42 and 43 fixed to the chassis 11, respectively, as shown in FIG. Gears 46, 47 and another gear 48 are fixed to the upper sides of the flywheels 39, 40, respectively, and intermediate gears (not shown) are interposed between the gears 46, 47 and the gears (not shown) of the supply reel stand 44 and the take-up reel stand 45, respectively. It is provided.

Next, a sensor 49 is supported on the sensor arm 7 by a shaft 50 as shown in FIGS. 6 and 7, and the long tongue piece 49a of the sensor 49 is pushed by a clutch actuating plate 51 for detecting the end of the tape of the tape end detection mechanism. One end 49b of the sensor 49 is urged by a spring 53 to face the cam of the stop gear 52. The sensor arm 7 has an arm 7b rotatably supported on a fixed shaft 54 of the chassis 11, and the pin 7a at the other end of the arm faces the inside of the arcuate arm 6f of the release arm 6. While the supply reel stand 44 and take-up reel stand 45 are rotating, the clutch actuating plate 51
is biased toward the left side against the spring 53, and when the rotation stops, one end 49b of the sensor 49 is connected to the stop gear 52.
When pulled to the right by the cam, the arc arm 6f is moved forward by the pin 7a, and as shown in FIGS. When the pin 6b is out of the surface 8a, the release lever 19 is pulled up and the operation is stopped, and when the pin 6b is facing the arcuate surface 8a, the pin 6b is removed.
The arcuate surface 8a of the switching trigger 8 is pushed up, the head switching cam gear 31 is reversed, and the magnetic head 33 is reversed.

Next, the head switching cam gear 31 of the head switching mechanism
As shown in FIG. 6, it is rotatably fitted to a fixed shaft 54' implanted in the chassis 11, and toothless parts 31a and 31b are formed at symmetrical positions on the outer periphery, and the long pin 32 is implanted on the upper surface. A cam surface 31d has a V-shaped recess 31c at a position 90° out of phase with the pin 32 position on the lower surface, and a sixth cam surface 31d on the outside of the recess 31c.
A V-shaped protrusion 31e is formed which is engaged with the pin 8b at one end of the switching trigger 8 shown in FIGS. and is rotated via the pulley gear 56, intermediate gear 57, and stop gear 52.

The pin 8b at one end of the switching trigger 8 is connected to the spring 5.
8 is pressed against the recess 31c, and the switching trigger 8
is rotatably supported in the middle by a fixed shaft 59 implanted in the chassis 11, and a bent portion 60 of the direction lever 60 is mounted on the other end side surface 8c of the switching trigger 8.
A is faced so that it is in contact with it. The direction lever 60 is held by the chassis 11 so as to be slidable back and forth, is biased toward the front side by a spring 61, and has a manual lever 60b formed on the side thereof and projects outward from the chassis 11.

The operation of the head switching mechanism is as shown in Fig. 1.
When the head switching plate 27 corresponding to 3 corresponds to the B side is a solid line, when the manual lever 60b of the direction lever 60 is pushed forward, the switching trigger 8 is rotated clockwise against the spring 58. As a result, the pin 8b comes off from the recess 31c of the head switching cam gear 31 and pushes the protrusion 31e, and the head switching cam gear 31 is rotated by 180° clockwise with the teeth on its outer periphery meshing with the stop gear 52. By this half rotation, the head switching plate 27 is reversely swung by the long pin 32 in the counterclockwise direction indicated by the two-dot chain line in FIG. 1, and the rotating magnetic head 33 is brought into correspondence with the A plane.

On the back side of the chassis 10, as shown in FIG. 5, an assist cam gear 17, an assist trigger 62, an assist lever 63, and a change arm 16 are rotatably supported. A toothless portion is provided on the outer periphery of the assist cam gear 17 and faces the gear 48 of the flywheel 40 so as to be able to mesh with the gear 48 of the flywheel 40.
Operating cams that engage with one end of the assist trigger 62 and the assist lever 63 are provided on the upper and lower surfaces, respectively.

The other end of the assist trigger 62 is pushed forward by the downwardly bent portion 2b of the recording lever 2. The other end 63 of the assist lever 63
A spring 64 is stretched between the bent portion 29a of the head board 29 in FIG.
3 and one end of the change arm 16 are connected by a pin and an elongated hole, and the protrusion 16a at the other end of the change arm 16 is arranged at the rotation position of the leg 4b of the recording switch pawl 4.

When the recording operation lever 5 configured as described above is pushed down, the motor 36 is rotated, the assist cam gear 17 is rotated, the head board 29 is advanced, and the protrusion 2 of the recording lever 2 is moved forward as shown in FIG.
Bent part 4a of recording switch pawl 4 facing the sliding area of a
is pushed up and the recording switch pawl 4 is rotated counterclockwise, and the leg portion 4b of the recording switch pawl 4 is pushed up so as to face the rotation range of the protrusion 16a of the change arm 16. With this operation, the recording switch lever 3
When the mode switching arm 1 is advanced and the mode switching arm 1 is in the first position of the "continuous reproduction repeat mode" indicated by the two-dot chain line in FIG. is moved to the second position of the "reciprocal recording/playback mode" and recorded on side A of the tape. At the end of the tape on the A side, the head switching plate 27 is reversely swung according to the setting state of the mode switching mechanism, the tape end detection mechanism, and the head switching mechanism, and the magnetic head 33 corresponds to the B side. Further, at the end of the tape on side B, the tape end detection mechanism, sensor mechanism, switching rotary piece 9, and release mechanism stop the operation.
Therefore, the inconvenience of erasing recorded material and repeating recording is automatically eliminated.

In the playback operation, even if the mode switching arm 1 is in the first position of the "continuous playback repeat mode", the recording switch pawl 4 is not rotated, so that the mode cannot be switched to the "reciprocating recording/playback mode". do not have.

[Effect of idea]

Since the present invention is configured as described above, even if the mode switching arm is in a state where the continuous playback repeat mode is selected, the recording switch lever is moved forward in conjunction with the advance of the recording lever, and the mode switching arm is always able to perform reciprocating recording and playback. This eliminates the inconvenience of repeating the operation of erasing and recording what was recorded after being automatically switched to the mode, and the mode switching arm can be reliably and stably switched even if the operation of pressing down the recording operation lever is done lightly with a small pressing torque. It is possible to provide an automatic repetition mode canceling mechanism in the recording operation of a tape recorder, which has a simple configuration, has a small number of components, can be made compact, and has excellent practical effects.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a plan view of a tape recorder, Fig. 2 is a front view of the tape recorder, Figs. 3 and 4 are plan views of the operation of the mode switching mechanism, and Fig. 5 is a plan view of the tape recorder. The figure is a plan view of the upper chassis, FIG. 6 is a plan view with the upper chassis and reel stand removed, and FIG. 7 is a plan view of essential parts of the release arm, release lever, and sensor mechanism. 1...Mode switching arm, 2...Recording lever,
3... Recording switch lever, 4... Recording switch pawl, 5... Recording operation lever, 16... Change arm, 17... Assist cam gear, 29... Head board,... Continuous playback repeat mode position,
...Reciprocating recording/playback mode position.

Claims (1)

[Scope of utility model registration request] A slidable mode switching arm that selects multiple modes, a recording operation lever that performs recording operations, a slidable recording lever, a slidable recording switch lever, and a head board that moves forward. a change arm rotated by the assist cam gear, a recording switch pawl provided on the recording switch lever facing the sliding area of the recording lever, and the mode switching arm continuously repeating reproduction on the near side. When in mode position,
When the recording operation lever is operated, the recording lever is advanced and the recording switch pawl is rotated, and the recording switch lever is advanced by the change arm via the recording switch pawl,
1. An automatic repeat mode canceling mechanism in a recording operation of a tape recorder, characterized in that the mode switching arm is moved to a reciprocating recording/playback mode position and automatically switched.