JPH0624079B2 - Micro cassette recorder - Google Patents

Description

The present invention relates to a microcassette recorder, and more particularly to a microcassette recorder capable of high speed erasing in a rewind mode.

[Conventional technology]

Conventionally, as a method of erasing audio information in a microcassette recorder, (1) a configuration is made such that the erasing head approaches and separates from a tape independently of a recording / playback head and a subchassis equipped with a pinch roller,
There are known a method of erasing only the erasing head adjacent to the tape in the rewind mode, and (2) a method of providing the erasing head on the sub-chassis and operating the erasing head and the pinch roller in the rewinding mode to perform the erasing. ing.

[Problems to be solved by the invention]

By the way, the erasing method of (1) above is a rewinding mode, and erasing is performed while rewinding the tape at high speed without bringing the pinch roller into contact with the tape. Since the head needs to be driven independently of the sub-chassis, two driving solenoids are required, which leads to complication of the mechanism and high cost, and also increases the current consumption.

On the other hand, in the erasing method (2), the tape is held between the pinch roller and the capstan to perform the erasing while feeding the tape in the rewinding direction. Is the same as when recording / reproducing and is relatively slow, so the erasing speed is slow. Therefore, it is conceivable to increase the speed of the erasing operation by increasing the rotation speed of the drive motor, but in this case as well, the limit is generally about three times the normal speed, and so much higher speed cannot be expected. Moreover, in order to eliminate the difference between the tape winding speed of the supply reel base used for winding the tape at the time of rewinding and the tape feed speed of the capstan, a slip mechanism must be provided on the supply reel base. This leads to complication and high cost.

[Means for solving problems]

In order to solve the above problems, the microcassette recorder according to the present invention is provided with the first and second rotational force transmitting means on the rotating lever having the same rotation center as the capstan arranged on the main chassis, When the capstan rotates in the rewinding direction, the first rotational force transmission means engages with the supply reel stand so that the rotational force of the capstan is transmitted to the supply reel stand via the first rotational force transmission means, while the capstan is rotated. When rotating in the recording / playback direction, the second rotational force transmitting means is engaged with the take-up reel stand so that the rotational force of the capstan is transmitted to the take-up reel stand via the second rotational force transmitting means. The movement lever is rotated, the pinch roller,
The sub-chassis with the recording / playback head and the erasing head, the pinch roller can hold the tape between the capstan, and the recording / playback head and the erasing head are adjacent to the tape at the first position, and the pinch roller, recording·
Second, where the reproducing head and the erasing head are separated from the tape
In the microcassette recorder that is movable with respect to the main chassis with respect to the position, the sub-chassis is provided during the rewinding operation, in which the rotation lever is oriented so that the first rotational force transmission means engages with the supply reel base. The rotation lever is provided with a blocking means for blocking the contact of the pinch roller with the tape at the first position.

[Action]

According to the above configuration, even when the sub-chassis is moved to the first position and the recording / reproducing head and the erasing head are adjacent to the tape during the rewinding operation in which the first rotational force transmitting means engages with the supply reel base, the pinch is performed. Since the roller does not contact the tape, the tape can be run at high speed in the rewind mode even when the erasing head is adjacent to the tape.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

As shown in FIG. 1, a substantially L-shaped sub-chassis 2 is placed on the main chassis 1 of the microcassette recorder, and the sub-chassis 2 has a guide pin 3a inserted into the long hole 2a and two other sub-chasses. It is supported by the guide members 3b and 3c so as to be movable in the arrow A direction or the reverse A direction.
The sub chassis 2 is constantly urged in the A direction by the coil spring 4, while the sub chassis 2 can be pulled in the reverse A direction against the urging force of the coil spring 4 by the solenoid 5 installed at one corner of the main chassis 1. It has become.

An erasing head 7 for erasing voice information on the tape 6 and a recording / reproducing head 8 for recording or reproducing on the tape 6 are mounted on the subchassis 2. Both heads 7 and 8 are tapes 6 when the subchassis 2 is at the first position shown, that is, at the moving end in the reverse A direction.
On the other hand, the sub chassis 2 is separated from the tape 6 when the sub chassis 2 is at the second position which is the moving end in the A direction.

On the sub-chassis 2 on the side of the recording / playback head 8, a pinch roller lever 9 is supported so as to be swingable about a swing shaft 10 within a predetermined angle range. An engagement portion 9a is formed on the lower surface side of the pinch roller lever 9, and a pinch roller 12 is rotatably attached by a shaft 11 near the free end of the pinch roller lever 9. The pinch roller lever 9 is moved in the B direction by a biasing means such as a spring (not shown).
That is, the pinch roller 12 causes the capstan 1 described later.
It is urged in the direction of approaching and abutting with No. 3.

A capstan 13, which is connected to a drive motor (not shown) and integrally formed with a gear 13a, is rotatably provided at a position facing the pinch roller 12 on the main chassis 1. Below the main chassis 1,
A rotation lever 14 having a substantially triangular shape is fitted to the capstan 13. At the two corners of the turning lever 14,
First and second as first and second rotational force transmitting means
The intermediate gears 15 and 16 are rotatably attached, and the intermediate gears 15 and 16 are the gears 1 of the capstan 13.
It meshes with 3a. As also shown in FIG. 2, a protrusion 14a as a blocking means is provided so as to project upward from the other corner portion of the rotary lever 14.

A viscous grease or the like is injected between the capstan 13 and the rotating lever 14, so that the rotating lever 14 rotates in the same direction as the rotating direction of the capstan 13 within a predetermined angle range. . As shown in FIG. 1, the projection 14a engages with the engaging portion 9a of the pinch roller lever 9 only when the first intermediate gear 15 described later meshes with the gear 17a of the supply reel base 17. . As a result, the third
As shown in the figure, the first intermediate gear 15 is connected to the supply reel stand 17
When the sub-chassis 2 is moved to the first position, that is, the positions where both heads 7 and 8 are adjacent to the tape 6, when the sub-chassis 2 is not meshed with the gear 17a, the pinch roller 12 comes into contact with the capstan 13 and the capstan 13 Tape to and from
However, as shown in FIG. 1, when the first intermediate gear 15 is meshed with the gear 17a of the supply reel stand 17, the pinch roller lever 9 reverses A due to the engagement between the protrusion 14a and the engaging portion 9a. Since the movement in the direction is blocked, even if the subchassis 2 is moved to the first position, both heads 7 and 8 will not move to the tape 6
However, the pinch roller 12 does not contact the tape 6. When the sub-chassis 2 is moved to the second position, that is, the position where both heads 7 and 8 are separated from the tape 6, the pinch roller 12 is always separated from the tape 6 regardless of the direction of the rotating lever 14. It is like this.

The main chassis 1 is rotatably provided with a supply reel stand 17 and a take-up reel stand 18 each having gears 17a and 18a. And the capstan 13 is C
In the rewinding mode in which the rotary lever 14 also rotates in the C direction, the first intermediate gear 15 meshes with the gear 17a of the supply reel stand 17 as shown in FIG. The rotational force is transmitted to the supply reel stand 17 via the first intermediate gear 15, and the supply reel stand 17 rotates in the D direction. On the other hand, as shown in FIG. 3, the second intermediate gear 16 meshes with the take-up reel stand 18 in the recording / playback mode in which the capstan 13 rotates in the E direction, and therefore the rotating lever 14 also rotates in the E direction. The torque of the capstan 13 is transmitted to the gear 18a of the take-up reel stand 18 via the second intermediate gear 16, and the take-up reel stand 18 rotates in the F direction.

In the above structure, when the audio information on the tape 6 is erased, the first intermediate gear 15 is supplied to the supply reel stand by rotating the capstan 13 in the direction C for about 100 msec by the drive motor in advance, for example. 17 gears 17
Be sure to mesh with a. After that, the sub chassis 2 is moved in the reverse A direction by the solenoid 5 and set to the first position. At this time, since the protrusion 14a of the rotating lever 14 engages with the engaging portion 9a of the pinch roller lever 9, the movement of the pinch roller lever 9 in the reverse A direction is blocked, so that the reverse A of the sub chassis 2 is prevented. As the pinch roller lever 9 moves in the direction B, the pinch roller lever 9 rotates in the reverse B direction around the swing shaft 10 as a fulcrum, and as a result, the pinch roller 12 does not contact the tape 6. Therefore, in the rewinding mode, the tape 6 is wound at high speed only by the rotational force of the supply reel stand 17. By supplying an erase current to the erase head 7 in this state,
High speed erasing can be done in rewind mode.

On the other hand, when recording or playing, the capstan 13
By rotating in the E direction, as shown in FIG.
The intermediate gear 16 is meshed with the gear 18a of the take-up reel stand 18, and the sub chassis 2 is set to the first position in this state. At this time, since the protrusion 14a of the rotating lever 14 does not engage with the engaging portion 9a of the pinch roller lever 9 due to the rotation of the rotating lever 14 in the E direction, the pinch roller 12
Makes contact with the capstan 13 and holds the tape 6 between the capstan 13 and the capstan 13. In this state, the recording / reproducing can be performed by driving the recording / reproducing head 8 while the tape 6 is moved to the take-up reel stand 18 side by the capstan 13.

In the above embodiment, the pinch roller 1 for the sub chassis 2
The relative movement of the pinch roller lever 9 with respect to the subchassis 2 is performed by swinging the pinch roller lever 9.
The relative movement of 2 may be performed by other methods. The present invention can be applied to a microcassette recorder incorporated in a telephone, particularly a microcassette recorder which can be controlled from the outside through a telephone line, and a microcassette recorder used for various purposes.

〔The invention's effect〕

As described above, in the microcassette recorder according to the present invention, the first and second rotational force transmitting means are provided on the rotating lever having the same rotation center as the capstan arranged on the main chassis, and the capstan is wound. When rotating in the return direction, the first rotational force transmitting means engages with the supply reel base and the rotational force of the capstan is transmitted to the supply reel base via the first rotational force transmission means, while the capstan is recorded. When rotating in the reproduction direction, the second lever for transmitting torque is engaged with the take-up reel stand so that the torque of the capstan is transmitted to the take-up reel stand via the second torque transmitter. The sub-chassis with the pinch roller, recording / playback head and erasing head, as the pin is rotated, allows the pinch roller to hold the tape between the capstan and the recording / playback head. A microcassette recorder that is movable with respect to a main chassis between a first position where a head and an erasing head are adjacent to a tape and a second position where a pinch roller, a recording / playback head and an erasing head are separated from the tape, When the revolving lever is oriented so that the first rotational force transmitting means engages with the supply reel base, the blocking means for blocking contact of the pinch roller with the tape at the first position of the sub chassis rotates. This is a structure provided on the moving lever.

As a result, even when the sub-chassis is moved to the first position and the recording / playback head and the erasing head are adjacent to the tape during the rewinding operation, the pinch roller does not come into contact with the tape, so only the rotational force of the supply reel base is used. By operating the erasing head while rewinding the tape at high speed, it is possible to perform high-speed erasing. in this case,
It is only necessary to provide a simple blocking means on the rotating lever to prevent the pinch roller from contacting the tape in the first position, and it is not necessary to drive the pinch roller separately from the sub-chassis. It also has the effect of achieving cost reduction.

[Brief description of drawings]

1 to 3 show an embodiment of the present invention. FIG. 1 is a schematic plan view of a microcassette recorder during a rewinding operation, and FIG. 2 is a microcassette recorder during a rewinding operation. Partial cross-sectional view and FIG. 3 are schematic plan views of the microcassette recorder during the recording / reproducing operation. 1 is a main chassis, 2 is a sub chassis, 6 is a tape,
7 is an erasing head, 8 is a recording / playback head, 12 is a pinch roller, 13 is a capstan, 14 is a turning lever, 14
a is a protrusion (blocking means), 15 is a first intermediate gear (first rotational force transmitting means), 16 is a second intermediate gear (second rotational force transmitting means), 17 is a supply reel stand, and 18 is a take-up reel stand. Is.

Claims (1)

[Claims] 1. A first and second rotational force transmitting means are provided on a rotary lever having the same center of rotation as a capstan arranged on a main chassis, and the first rotation is performed when the capstan rotates in a rewinding direction. The force transmission means engages with the supply reel base to transmit the rotational force of the capstan to the supply reel base via the first rotational force transmission means, while the second rotation force is applied when the capstan rotates in the recording / playback direction. The rotation lever is rotated so that the transmission means is engaged with the take-up reel stand and the rotational force of the capstan is transmitted to the take-up reel stand via the second rotational force transmission means, and the pinch roller and recording are performed.・
The subchassis with the playhead and erase head
The pinch roller allows the tape to be held between the capstan and the first position where the recording / playback head and the erasing head are adjacent to the tape, and the second position where the pinch roller, the recording / playback head and the erasing head are separated from the tape. In the microcassette recorder movable between the position and the main chassis, the sub-chassis during the rewinding operation in which the rotating lever is oriented so that the first rotational force transmitting means engages with the supply reel base. 2. A microcassette recorder characterized in that a rotation lever is provided with a blocking means for blocking contact of the pinch roller with the tape at the first position.