JPH0544898Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a tape recorder, and particularly to a drive device that transmits the rotation of an electric motor to a reel shaft.

(b) Prior Art Cassette-type tape recorders that use cassette tapes, in which magnetic tape is stored in a container called a cassette, are in widespread use, but the driving operation of the reel shaft in such tape recorders is There is a constant speed drive operation for fast forwarding and fast rewinding. There are mechanisms that use belts, pulleys, and gears to transmit the rotation of the electric motor to the reel shaft, and techniques using such transmission means include, for example,
There is one disclosed in Publication No. 26537.

(c) Problems to be solved by the invention The above-mentioned publication describes a method in which a gear is formed on the reel shaft during driving operation, and is provided to rotate integrally with a pulley to which the rotation of the electric motor is transmitted by a belt. However, in such technology, the tension of the belt is constantly acting on the axis of the pulley, causing an inclination of the axis, and changes in the inclination of the axis This causes uneven rotation, and in ultra-compact tape recorders, there are problems with parts coming into contact with each other. The present invention aims to provide a drive device for a tape recorder that is improved in this respect.

(d) Means for solving the problem The present invention is fixed on a rotary lever which is rotatably mounted on a fixed base plate and which is moved from a non-operating position to an operating position by a switching operation. A pulley, through which the rotation of the electric motor is transmitted by a belt, and a transmission rotor, which rotates integrally with the pulley, are rotatably attached to the rotor support shaft, and the end of the rotor support shaft is brought into contact with a fixed substrate. It is something that I have come into contact with.

(e) Effect The present invention is based on the fact that the pulley and the transmission rotating body are rotatably mounted, and the other end of the rotating body support shaft, one end of which is fixed on the rotation lever, is brought into contact with the fixed base plate. Therefore, changes in the inclination of the rotating body support shaft are prevented.

(f) Examples The drawings all relate to the drive device of the present invention.
2 is a plan view showing the stopped state, FIG. 2 is a plan view showing the fast forward operation state, and FIG. 3 is a side view of the main parts. Reference numeral 1 denotes a take-up reel shaft rotatably attached to a fixed base plate 2, and a reel stand 3 is provided so as to rotate integrally therewith. Reference numeral 4 denotes an intermediate rotating body which is rotatably attached to the fixed base plate 2 by a shaft 5 and is in contact with the reel stand 3 of the take-up reel shaft 1. A rotating lever 6 is rotatably attached to the fixed base plate 2 by a shaft 7, and rotates from a non-operating position to an operating position during a fast-forward operation; 8 has one end 8a fixed to the rotating lever 6; The free end portion 8b, which is the rotating body support shaft and the other end portion, is brought into contact with the fixed base plate 2, and the contact relationship is determined by the rotational movement of the rotational lever 6. The structure is such that it does not cause any problems. 9 is the rotating body support shaft 8
A pulley 11 is rotatably attached to the rotating body support shaft 8 to rotate integrally with the pulley 9 and to which the rotation of an electric motor (not shown) is transmitted via a belt 10. a transmission rotary body mounted thereon, which is configured to come into contact with the intermediate rotary body 4 when the pivot lever 6 is in the operating position. Reference numeral 12 designates an operating lever on which is formed an operating part 13 that is operated during a fast-forward operation, and is moved from a stop position to an operating position during a fast-forward operation, and is inserted into a connecting hole 14 formed in the rotary lever 6. Connecting pin 1
5 is installed and fixed. Reference numeral 16 denotes a guide elongated hole formed in the operating lever 12, into which a first guide pin 17 provided on the fixed substrate 2 is inserted. Reference numeral 18 denotes an L-shaped guide hole formed in the operating lever 12, which is connected to a first hole 19 in the same direction as the guide hole elongated hole 16 and in a direction perpendicular to the first hole 19. A second guide pin 21 formed of a second hole 20 and provided on the fixed substrate 2 is inserted therein. 22 is a spring whose one end is fixed to the fixed base plate 2 and the other end is fixed to the operating lever 12, and the operating lever 12 is connected to the L
It has the effect of biasing toward the corner of the letter-shaped guide hole 18 , that is, in the direction of arrow A. In addition, in such a configuration, a biasing force in the direction of arrow B is constantly applied to the rotating body support shaft 8 fixedly mounted on the rotating lever 6 due to the tension of the belt 10. The drive device of the present invention is constructed as described above, and its operation will be explained next.

The state shown in FIG. 1 is a stopped state, and in such a state, the operating lever 12 is
It is in a state where it is displaced and maintained in the direction of arrow C, which is the stop position, by the component of the urging force No. 2 in the direction of arrow C.
When the operation lever 12 is in the stop position, the rotation lever 6, which is connected to the operation lever 12 by cooperation of the connection pin 15 and the connection hole 14, is in a non-operation position displaced in the counterclockwise direction, and the rotation lever 6 is in a non-operation position displaced counterclockwise. moving lever 6
A transmission rotating body 11 rotatably mounted on the
is located at a position spaced apart from the intermediate rotating body 4. Therefore, even if the electric motor starts rotating after performing a regeneration or rewinding operation from such a stopped state, the transmission rotating body 11
Since the rotation is not transmitted to the take-up reel shaft 1, the reproducing operation or the rewinding operation can be performed without any trouble.

Next, a case will be described in which a fast forward operation is performed while the tape recorder is in the stopped state shown in FIG. 1. For such fast forward operation, press operation lever 1.
This is carried out by pressing the operating portion 13 formed at 2 in the direction of arrow D. When the operating portion 13 is pressed in the direction of arrow D, the operating lever 1
2 is displaced in the direction of the arrow D against the biasing force of the spring 22 in the direction of the arrow C, but this displacement action is caused by the cooperation between the elongated guide hole 16 and the first guide pin 17 and the L-shape. This is carried out linearly by cooperation between the first hole portion 19 and the second guide pin 21 that constitute the shaped guide hole 18 . Due to this linear displacement operation, the operating lever 12 is brought to a predetermined position, that is, the second guide pin 21 is located at the first position where the second guide pin 21 forms the L-shaped guide hole 18 .
When the operating lever 12 is moved to the end of the hole 19, the operating lever 12 is rotated clockwise about the first guide pin 17 by a component of the biasing force of the spring 22 in the direction of the arrow E. As shown in FIG. 2 when the operating lever 12 is rotated clockwise, the second guide pin 21 is positioned within the second hole 20 forming the L-shaped guide hole 18. As shown in FIG. In this state, the operating lever 12 is moved to the first position by the component force of the spring 22 in the direction of the arrow E.
Since it is urged to rotate clockwise around the guide pin 17, it is locked and held in the operating position by the engagement between the second hole portion 20 forming the L-shaped guide hole 18 and the second guide pin 21. in a state. When the operation lever 12 is displaced to the operating position by such operation, the rotation lever 6 connected to the operation lever 12 by the cooperation of the connecting pin 15 and the connecting hole 14 moves clockwise around the shaft 7. Rotationally displaced to the operating position. When the rotary lever 6 is displaced to the operating position, the transmission rotary body 11 rotatably mounted on the rotary lever 6 transfers to the intermediate rotary body 4.
come into contact with. As a result of this operation, the rotational force of the electric motor transmitted to the pulley 9 by the belt 10 is transmitted to the reel stand 3 via the transmission rotary body 11 and the intermediate rotary body 4, and the take-up reel shaft 1 is rotated. Rotationally driven. As a result of such rotational driving of the take-up reel shaft 1, the tape recorder enters a fast forward operation state.

The switching operation of the tape recorder to the fast forward operating state is performed in this manner, and next, the switching operation from the fast forward operating state to the stop state will be explained. To switch to the stopped state, move the operating portion 13 of the operating lever 12 from the state shown in FIG. 2 in the direction of arrow C.
This is done by pressing in the direction. When the operating portion 13 is pressed in the direction of arrow C, the operating lever 1
2 receives a rotational displacement force in the counterclockwise direction about the first guide pin 17. When the operating lever 12 receives a rotational displacement force in the counterclockwise direction, the operating lever 12 is rotated counterclockwise against the rotational biasing force due to the component of the biasing force of the spring 22 in the direction of arrow E. I am forced to do it. Due to this rotational displacement operation, the operating lever 12 is placed in a predetermined position, that is, the second guide pin 21 is placed in the second hole portion 2 forming the L-shaped guide hole 18 .
When the operating lever 12 is displaced to the 0 end, a component of the biasing force of the spring 22 in the direction of arrow C
is displaced in the direction of arrow C, that is, in the same direction as the pressing force on the operating portion 13. When the operation lever 12 is displaced in the direction of arrow C, which is the stop position, by this operation, the rotating lever 6 connected to the operation lever 12 is rotated counterclockwise about the shaft 7 to the non-operation position. The displacement causes the tape recorder to come to a stopped state as shown in FIG.

As described above, switching from the stopped state to the fast-forward operating state and from the fast-forward operating state to the stopped state are performed, but when such operations are performed, the rotating lever 6 is in the non-operating position about the shaft 7. This results in rotational displacement between the operating position and the operating position. The rotational displacement operation of the rotational lever 6 is performed while the free end 8b of the rotating body support shaft 8 fixed on the rotational lever 6 remains in contact with the fixed base plate 2. It will be. That is, both ends of the rotating body support shaft 8 are supported by the rotating lever 6 and the fixed base plate 2. Further, since the rotation operation of the rotation lever 6 is performed by a switching operation force, the contact relationship between the rotation body support shaft 8 and the fixed base plate 2 is made strong enough to be unaffected by the belt 10. However, the rotation operation of the rotation lever 6 can be performed without any problem. Therefore, the tension of the belt 10, which is stretched to transmit the rotational force of the electric motor to the pulley 9 rotatably attached to the rotary body support shaft 8, is applied to the rotary body support shaft 8 via the pulley 9. Even if the rotating body support shaft 8 acts on the rotor, the problem of tilting of the rotating body support shaft 8 does not occur.

In this embodiment, a driving device for fast forwarding has been described, but it is of course possible to implement the driving device for rewinding. Furthermore, gears or rollers can be used as the rotating body or intermediate rotating body for transmitting the rotation of the electric motor through the belt and the rotation of the pulley to the reel shaft.

(g) Effects of the invention The drive device of the invention fixes one end of the rotating body support shaft, on which the pulley, to which the rotation of the electric motor is transmitted via a belt, is rotatably attached, to a rotating lever, and fixes the other end of the rotating body support shaft to a rotary lever. Since the free end part, which is the part, is supported by contacting the fixed base plate, even if the tension of the belt acts on the rotating body supporting shaft, the inclination of the rotating body supporting shaft can be changed. There isn't. Therefore, it is possible to solve the problems of uneven rotation and contact between parts caused by the inclination of the rotating body support shaft, and the practical value of the present invention is very high.

[Brief explanation of the drawing]

The drawings all relate to the drive device of the present invention; FIG. 1 is a plan view showing the stopped state, FIG. 2 is a plan view showing the fast forward operating state, and FIG. 3 is a side view of the main parts. Explanation of main drawing numbers, 1... Take-up reel shaft, 2...
...Fixed board, 6...Rotating lever, 8...Rotating body support shaft, 9...Pulley, 10...Belt, 11...
...transmission rotating body, 12...operation lever.

Claims (1)

[Scope of utility model registration request] It is rotatably attached to a fixed board and can be moved from a non-operating position to an operating position by switching operation force.
Additionally, there is a rotary lever that is rotatably displaced from an operating position to a non-operating position, a rotary body support shaft fixed on the rotary lever, and an electric motor rotatably attached to the rotary body support shaft. a pulley whose rotation is transmitted by a belt; and a pulley which is attached to the rotating body support shaft so as to rotate integrally with the pulley, and when the rotary lever is in the operating position, the rotation of the pulley is transmitted to the reel shaft. and a transmission rotating body that transmits a transmission to the rotating body, and by bringing the free end of the rotating body support shaft into contact with the fixed base plate, the rotary body supporting shaft is supported by the rotating lever and the fixed base plate. A drive device for a tape recorder, characterized in that a change in inclination of a rotating body support shaft is prevented.