JPH0630190B2 - Tape recorder rapid winding mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a tape recorder fast-forward mechanism used in, for example, a small headphone stereo.

<Prior Art> Recently, as seen in a headphone stereo, a tape recorder has been increasingly miniaturized by playing for a long time at a low voltage and computerization. At this time, in order to miniaturize the tape recorder, it is first necessary to simplify the mechanical structure.

Conventionally, as one of the simplification of the mechanical structure, there is a tape recorder quick winding mechanism. That is, this tape recorder fast winding mechanism is a reel table fast-forward for transmitting the rotation of the both rotation motors to the supply reel table or the take-up reel table between the both rotation motors and the supply reel table or the take-up reel table. A mechanism is provided, and when the both rotary motors rotate in one direction, the reel base fast-forward mechanism moves in a direction corresponding to the rotation direction of the both rotary motors, and the rotations of the both rotary motors are supplied to the supply reel base or It is a mechanism that transmits to the take-up reel stand.

At this time, the reel base rapid feed mechanism is provided with, for example, a rapid feed gear that meshes with a transmission gear to which the rotations from the rotary motors are transmitted, and rotational resistance is added to the rapid feed gear. Therefore, when both of the rotary modes rotate and the transmission gear rotates in one direction, the fast-forward gear meshed with the transmission gear cannot rotate due to the rotation resistance, and the transmission gear is transmitted in the state of being meshed with the transmission gear. Move in the direction of rotation of the gear. As a result, the reel base rapid feed mechanism is integrated with the rapid feed gear and moves to a position where the rotation of the transmission gear can be transmitted to the supply reel base or the take-up reel base. Then, the rotations of the both rotary motors are transmitted to the supply reel base or the take-up reel base.

<Problems to be Solved by the Invention> However, the conventional tape recorder rapid winding mechanism described above is
Since the rotation resistance is always added to the fast-forward gear that meshes with the transmission gear, the rotation resistance acts on the fast-forward gear even during the reproduction with the rotation of the transmission gear during the reproduction.
There is a problem that the current consumption of both rotary motors increases and the battery life is shortened.

Therefore, an object of the present invention is to provide a tape recorder fast-winding mechanism capable of preventing an increase in current consumption at the time of reproduction by not operating the fast-forwarding mechanism at the time of reproduction.

<Means for Solving the Problems> In order to achieve the above object, the present invention provides a supply reel base side transmission gear that transmits a rotation torque to a supply reel base and a take-up reel that transmits a rotation torque to a take-up reel base. A base side transmission gear, a switching transmission member that is switched to the supply reel base side transmission gear side or the take-up reel base side transmission gear side by being guided by a guide pin, and mounted on the switching transmission member so as to mesh with the drive gear. It has a rotating gear to which a frictional force is added, and at the time of fast winding, with the rotation of the drive gear,
The switching transmission member integrated with the rotation gear by the frictional force applied to the rotation gear is switched to the supply reel base side transmission gear side or the take-up reel base side transmission gear side to change the rotation torque of the drive gear to the rotation gear. In the tape recorder fast-winding mechanism configured to transmit to the supply reel base side transmission gear or the take-up reel base side transmission gear via the above, the rotary gear is moved in one direction by an external reproduction operation during reproduction. It is characterized in that a switching lever for moving the switching transmission member via the guide pin in a direction of separating from the drive gear is provided.

<Operation> When the drive gear rotates in one direction during fast winding, the switching transmission member integrated with the rotation gear is transmitted to the supply reel base side by the frictional force applied to the rotation gear on the switching transmission member. Guide pin is switched to the gear side or the take-up reel stand side transmission gear side, and the rotation torque of the drive gear is transmitted to the supply reel stand side transmission gear or the take-up reel stand side transmission gear through the rotary gear. To be done.

On the other hand, at the time of reproduction, when the switching lever is moved to one side by the reproduction operation from the outside, the switching transmission member accordingly moves the rotation gear in the direction of separating from the drive gear. Therefore, even when the drive gear is externally driven during reproduction, the rotary gear is not driven.

<Example> Hereinafter, the present invention will be described in detail with reference to illustrated examples.

FIG. 1 is a view showing a rewinding state in a tape recorder fast-winding mechanism of the present invention, FIG. 2 is a sectional view taken along the line AA of FIG. 1, and FIG. 3 is a view showing a fast-forwarding state. Yes, FIG. 4 is a diagram showing a reproduction state.

The structure of the tape recorder rapid winding mechanism of the present invention will be described with reference to FIGS. 1 and 2.

The cassette half 1 is held on the main chassis 2 by a mechanism (not shown). The main chassis 2 is the first
It is not shown in FIGS. 3, 3 and 4. The main chassis 2 includes a supply reel base shaft 3, a take-up reel base shaft 4, an idler gear shaft 7, an idler gear shaft 8, a guide pin 9, a transmission gear shaft 10, a guide pin 12 and a spring hook 13. Are respectively fitted and holes 11 are drilled.

The supply reel stand 5 is rotatably inserted into the supply reel stand shaft 3 and is prevented from coming off by a stopper 3a.
Further, the supply reel base bubbling 5 provided on the supply reel base 5.
a is capable of meshing with a reel hub (not shown) of the cassette half 1. Therefore, the reel of the cassette half 1 can be rotated by the rotation of the supply reel base 5 to wind the tape. The supply reel base gear 5b provided under the supply reel base 5 is always meshed with the idler gear 15, and the idler gear 15 is rotatably inserted into the idler gear shaft 8 and prevented from coming off by the stopper 8a. There is. The idler gear 15 has a role of changing the rotation direction. The idler gear 15 and the supply reel base gear 5b constitute a supply reel base side transmission gear.

The take-up reel stand 6 is rotatably inserted into the take-up reel stand shaft 4 and is prevented from coming off by a stopper 4a.
Further, the take-up reel stand hub 6 provided on the take-up reel stand 6
The tape a is meshed with the reel hub of the cassette half 1, and the tape can be wound by the rotation of the take-up reel stand 6. The take-up reel base gear 6b provided under the take-up reel base 6 is always meshed with the idler gear 14, and the idler gear 14 is rotatably inserted in the idler gear shaft 7 to prevent the idler gear 14 from coming off by the stopper 7a. Has been done. The idler gear 14 has a role of changing the rotation direction. The idler gear 14 and the take-up reel base gear 6b constitute a take-up reel base side transmission gear.

The guide pin 16 fitted to the main chassis 2 is slidably inserted into the guide hole 16c of the fast-forwarding lever 16 and is prevented from coming off by the stopper 9a. A guide pin 22a provided on the fulcrum lever 22 is slidably inserted into the guide hole 16b of the fast-forwarding lever 16 so that the stopper pin 22b prevents the guide pin 22a from coming off. The guide hole 16b and the guide hole c form an arc centered on the transmission gear shaft 10, and the fulcrum lever 22 has a first position.
When in the position shown in the figure, the rapid feed lever 16 is configured to be rotatable about the transmission gear shaft 10.

The rapid feed lever 16 penetrates the hole 11 of the main chassis 2 and projects to the lower part of the main chassis 2 with a metal portion 16a.
The shaft 17 is rotatably inserted in the metal portion 16a. The fast-forward gear 1 is attached to the upper portion of the shaft 17 protruding from the fast-feed lever 16.
8 is fixed. A compression spring 20 is inserted between the rapid feed gear 18 and the rapid feed lever 16,
When the rapid feed gear 18 rotates, a frictional force is applied to the rapid feed gear 18. Further, a fast-forward gear 19 is fixed to a portion of the shaft 17 protruding below the metal portion 16a, so that the fast-forward gear 18, the shaft 17, and the fast-forward gear 19 rotate together. The fast-forwarding lever 16, the metal portion 16a, the fast-forwarding gear 19, the shaft 17, and the fast-forwarding gear 18 constitute a switching transmission member.

The transmission gear 21 is rotatably inserted into the transmission gear shaft 10 and is prevented from coming off by a stopper 10a.
The transmission gear 21 is rotated in a clockwise direction and a counterclockwise direction by being transmitted with rotations from both rotary motors by a driving device (not shown).

Here, since the fast-forward gear 18 is axially pressed by the compression spring 20 as described above, when the fast-forward gear 18 tries to rotate, a frictional force is generated between the fast-forward gear 18 and the compression spring 20 and the transmission gear 21 is rotated. Rapid feed gear 1 by rotation
When the frictional force is larger than the rotational force of 8, the fast-forward gear 18 cannot rotate with respect to the fast-forward lever 16, and the transmission gear 21 and the fast-forward gear meshed with the transmission gear 21 follow the rotation of the transmission gear 21. Gear 19, Shaft 17, Rapid feed gear 1
8, the metal portion 16a and the fast-forwarding lever 16 are integrated and rotate about the transmission gear shaft 10 with the guide holes 16b and 16c as guides.

Therefore, when the transmission gear 21 rotates counterclockwise,
Similarly, the fast-forward lever 16 also rotates counterclockwise around the transmission gear shaft 10, and the fast-forward gear 18 meshes with the idler gear 15 as shown in FIG. Then, since the fast-forwarding lever 16 is fixed, the rotational force of the fast-forwarding gear 18 becomes larger than the frictional force, and the fast-forwarding gear 18 becomes rotatable. Then, the rotation of the transmission gear 21 is controlled by the fast-forward gear 1
It is transmitted to the supply reel base gear 5b through the shaft 9, the shaft 17, the rapid feed gear 18, and the idler gear 15, and is supplied to the supply reel base 5
Rotates and the tape is wound up. On the other hand, the transmission gear 21
When is rotated clockwise, the fast-forward lever 16 and the transmission gear 21 are integrated with the transmission gear shaft 10 in the same manner as described above.
Is rotated in the clockwise direction, and the fast-forward gear 18 meshes with the idler gear 14 as shown in FIG. Then, the rotation of the transmission gear 21 is transmitted to the idler gear 14 via the rapid feed gear 19, the shaft 17 and the rapid feed gear 18, and further to the supply reel base gear 6b to rotate the take-up reel base 6 counterclockwise. Wind the tape.

Two guide holes 2 provided at both ends of the fulcrum lever 22
Guide pins 12 and 12 fitted in the main chassis 2 are slidably inserted into 2c and 22c, and are constantly urged in the direction of arrow B by a spring 23. Fulcrum lever 2
The guide pin 22a provided on the No. 2 is a guide pin for rotating the rapid feed lever 16 about the transmission gear shaft 10 as described above. Therefore, when the fulcrum lever 22 is slid in the direction of the arrow C to move the position of the guide pin 22a to the anti-transmission gear 21 speed, the center of the arc of the guide holes 16b and 16c of the fast-forward lever 16 (that is, the rotation of the fast-forward lever 16). The center is on the outside of the transmission gear shaft 10. That is, as the fulcrum lever 22 moves in the direction of arrow C, the fast-forward gear 19 and the transmission gear 21 separate from each other.

The tape recorder quick-winding mechanism having the above-described configuration operates as follows.

In the rewinding state, as shown in FIG. 1, the fast-forward gear 18 meshes with the idler gear 15 and the transmission gear 2
When 1 is rotated counterclockwise as indicated by the arrow, the rotation of the transmission gear 2 is transmitted to the supply reel base gear 5b via the rapid feed gear 19, the shaft 17, the rapid feed gear 18 and the idler gear 15, and the supply reel is rotated. The table 5 is rotated. Therefore,
The magnetic tape (not shown) of the cassette half 1 is rewound.

In this state, when the rotation direction of the transmission gear 21 is switched to the clockwise direction, as described above, the fast-forwarding lever 16 is initially moved.
Is movable, the frictional force of the rapid feed gear 18 by the compression spring 20 is larger than the rotational force of the rapid feed gear 18.
Therefore, the rapid feed gear 18, the shaft 17, and the rapid feed gear 19 do not rotate with respect to the rapid feed lever 16, and the transmission gear 21, the rapid feed gear 19, the shaft 17, the metal portion 16a, the rapid feed lever 16 and the rapid feed gear 18 are integrated. And rotates clockwise about the transmission gear shaft 10. Eventually, the rapid feed gear 18 meshes with the idler gear 14, and the rapid feed state shown in FIG. 3 is established.

In the fast-forward state, as shown in FIG. 3, the fast-forward gear 18 meshes with the idler gear 14 and the transmission gear 2
When 1 is rotated clockwise as indicated by the arrow, the transmission gear 2
The rotation of No. 1 is transmitted to the take-up reel base gear 6b via the rapid feed gear 19, the shaft 17, the rapid feed gear 18, and the idler gear 14, and the take-up reel base 6 is rotated. Therefore,
The magnetic tape (not shown) of the cassette half 1 is fast-forwarded.

During reproduction, as shown in FIG. 4, the fulcrum lever 22 moves in the direction of arrow C in association with the operation of a reproduction operation mechanism (not shown). Then, the position of the guide pin 22a also moves in the direction of the anti-transmission gear 21, and the fast-forward lever 16 also moves in the direction of the anti-transmission gear 21 accordingly.
The meshing between 9 and the transmission gear 21 is separated. Then, the rotation of the transmission gear 21 is transmitted to the take-up reel base gear 6b by a low-speed rotation transmission means (not shown), the take-up reel base 6 rotates, and the tape is wound up for reproduction.

In the conventional tape recorder fast winding mechanism, the fast-forward gear 18 is separated from the idler gear 14 and the idler gear 15, but the fast-forward gear 19 is not separated from the transmission gear 21. Therefore, at the time of reproduction, the fast-forward gear 18 meshed with the transmission gear 21 starts to rotate unnecessarily, and an unnecessary friction force due to the compression spring 20 is generated in the fast-forward gear 18, causing an increase in current consumption. It was However, in the tape recorder fast-winding mechanism of the present invention, at the time of reproduction, the fast-forward gear 19 and the transmission gear 21 are separated from each other as described above. Therefore, during reproduction, the fast-forward gear 18 does not rotate, frictional force is not generated in the fast-forward gear 18, and it is possible to prevent unnecessary increase in consumed current and prolong battery life.

<Effects of the Invention> As is clear from the above, the tape recorder fast-winding mechanism of the present invention moves the switching lever in one direction by the reproducing operation from the outside to reproduce the rotational torque from the drive gear during reproduction. A switching transmission member for switching and transmitting the transmission gear to the supply reel base side transmission gear or the take-up reel base side transmission gear, so that the rotation gear mounted on the switching transmission member by meshing with the drive gear is separated from the drive gear. Since the drive gear is moved, the rotary gear does not rotate even when the drive gear is externally rotated during the reproduction, and a frictional force is not generated in the rotary gear, so that energy loss can be reduced. Therefore, the current consumption during reproduction can be reduced and the battery life can be extended.

[Brief description of drawings]

FIG. 1 is a view showing a rewinding state of a tape recorder fast-winding mechanism of the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG.
The figure shows the fast-forwarding state, and FIG. 4 shows the reproducing state. 1 ... Cassette half, 2 ... Main chassis, 3 ... Supply reel base shaft, 4 ... Take-up reel base shaft, 5 ... Supply reel base, 5b ... Supply reel base gear, 6 ... Winding Take-up reel base, 6b ... Take-up reel base gear, 7, 8 ... Idler gear shaft, 9, 22a ... Guide pin, 10 ... Transmission gear shaft, 12 ... Guide pin, 14, 15 ... Idler gears, 16 ... Rapid feed levers, 16b, 16c ... Guide holes, 17 ... Shafts, 18, 19 ... Rapid feed gears, 20 ... Compression springs, 21 ... Transmission gears, 22 ... Support levers, 22c ... … Guide hole, 23… Spring.

Claims (1)

[Claims] 1. A supply reel base side transmission gear for transmitting a rotation torque to a supply reel base, a winding reel base side transmission gear for transmitting a rotation torque to a winding reel base, the supply reel base side transmission gear side, or The take-up reel base side has a switching transmission member that is switched by being guided by a guide pin on the transmission gear side, and a rotary gear that is mounted on the switching transmission member so as to mesh with the drive gear and to which frictional force is applied. During fast winding, the switching transmission member integrated with the rotating gear due to the frictional force applied to the rotating gear along with the rotation of the driving gear is provided on the supply reel base side transmission gear side or the winding reel base side transmission gear side. In the tape recorder fast winding mechanism configured to transmit the rotational torque of the drive gear to the supply reel base side transmission gear or the take up reel base side transmission gear via the rotary gear. A switching lever is provided which moves in one direction by a reproduction operation from the outside at the time of reproduction and moves the switching transmission member via the guide pin in a direction of separating the rotary gear from the drive gear. Tape recorder fast winding mechanism.