JPH08138279A - Cassette tape recorder mode converter - Google Patents

Abstract

(57) [Abstract] [Purpose] A mode conversion device for a cassette tape recorder that can reduce power consumption by disengaging the selected gear from the main gear when selecting play, record, reverse play, or reverse record modes. To provide. According to the present invention, a reel gear and a main gear that are axially rotatably coupled to a main plate, a selection lever that selectively rotates in the rotation direction of the main gear, and one end of the selection lever are formed. By selectively meshing with the main gear, the selective gear that transmits the rotational force required for winding the tape reel to the reel gear, the cam gear that rotates a certain amount each time the recorder changes modes, and the main gear that selectively rotates the cam gear A pinch gear for transmitting the rotational force of the, a transmission lever rotatably provided on the same axis as the pinch gear, a solenoid bar for initially rotating the cam gear at the time of selecting play or record mode,
A selection lever sliding means for moving the selection lever of the selection gear downward to separate the engagement between the selection gear and the main gear;
Consists of

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mode converter for a cassette tape recorder, and more specifically, when selecting a play, record, reverse play or reverse record mode, the selected gear is disengaged from the main gear to reduce power consumption. It was made possible.

[0002]

2. Description of the Related Art Generally, a cassette tape recorder is a device for reproducing a sound recorded on a tape or recording an external sound on a tape. It has a mode converter for selectively reproducing the sound or the sound on the B side and selectively recording the external sound on the A side or the B side of the tape.

As shown in FIGS. 1 to 4, a conventional mode conversion device includes a main gear 2 rotatably provided on a main plate 1 and rotated by a driving force of a motor (not shown), and the main plate 1. A pinch gear 3 rotatably provided on the main plate 2 to rotate by receiving the rotational force of the main gear 2, a cam gear 4 rotatably provided on the main plate 1 to selectively receive the rotational force of the pinch gear 3 and rotate. A solenoid lever 7 is elastically provided on the plate 1 by a spring 5 and performs initial meshing so that the cam gear 4 receives the rotational force of the pinch gear 3 while rotating according to the operation of the solenoid 6 during mode conversion. , Rotatably provided on the main plate 1 and elastically provided by the first torsion spring 8 in accordance with the rotation of the cam gear 4. An actuating lever 9 selectively rotates,
A mode conversion switch (shown in the figure) is provided so as to be movable on the main plate 1 and move left and right in response to the rotation of the actuating lever 9 to enable stop, play, record, reverse play, and reverse record modes. Function plate 10 for operating
And a clutch means that is rotatably provided coaxially with the main gear 2 and transmits or cuts off power by the turning force of an operating lever; and a turning force of a solenoid lever 7 that is provided rotatably on the main plate 1. Is provided on the same axis as the main gear 2 so as to be rotatable, and selectively receives power so as to be in the FF / REW mode by receiving the turning power of the rotation lever 11. The transmitting means and the pinch gear 3 are rotatably provided coaxially with each other, and when the play, record, reverse play or reverse record mode is selected, the selecting means is restricted by the rotational force of the cam gear 4 and the FF is provided. When the mode of / REW is selected, the restriction means for releasing the restriction of the selection means, and the play, record, and / or the reversing means provided rotatably on the main plate 1. Spray, a reverse record, F
When the F / REW mode is selected, the clutch means and the power transmission means for selectively transmitting the power so as to drive the tape by receiving the rotational force of the main gear 2 by the selection means.

The cam gear 4 has an upper cam 12 on its upper surface.
And an inner lower cam 13 and an outer lower cam 14 are formed on the lower surface. The upper cam 12 has a first locking portion 12a, a second locking portion 12b, and a third locking portion 1.
2c, and one side of the outer lower cam 14 is provided with a first step portion 14a, a second step portion 14b, and a third step portion 14c.

The solenoid lever 7 has first, second and third locking portions 12a, 12 of the upper cam 12 when the cam gear rotates.
The first upper protruding pin 7 so as to selectively hang on b and 12c.
a is formed, and a first lower protruding pin 7b is formed so that the rotating lever 11 can be rotated when the solenoid lever 7 is rotated. The actuating lever 9 includes an inner lower cam of the cam gear 4. A second projecting pin 9a is formed so as to be guided by 13, and an upper concave groove 9b and a lower concave groove 9c are formed in the upper and lower ends thereof, respectively, and one side of the upper surface of the function plate 10 is formed. The third protruding pin 10a is formed so as to be inserted into the upper concave groove 9b formed in the operating lever 9.

On the other hand, the clutch means is integrally formed on the lower surface of the main gear 2, and is provided with a drive gear 15 that rotates together with the rotation of the main gear, and a rotational force of an operating lever 9 that is rotatably provided coaxially with the main gear 2. The clutch lever 16 which receives and rotates, and the clutch lever 16 which is coupled to the lower end of the clutch lever and is rotated by the rotational force of the drive gear 15, serves as a power transmission means only when a play, record, reverse play, or reverse record mode is selected. It is composed of a moving gear 17 for transmitting power. A fourth protruding pin 16a is formed at an upper end of the clutch lever 16 so as to be inserted into a lower groove 9c formed at a lower end of the operating lever 9, and the clutch lever 16 is rotated when the operating lever 9 is rotated. Also be rotated.

The selecting means is rotatably provided coaxially with the main gear 2 and has a locking piece 18a formed on an upper portion thereof and a protruding piece 18b formed on one side thereof.
8 and FF / REW, which is rotatably provided at the lower end of the selection lever and is rotated by the rotational force of the main gear 2.
The selection gear 19 selectively transmits power to the power transmission means only when the mode is selected.

The restricting means is rotatably provided on the same axis as the pinch gear 3 and is elastically installed by the second torsion spring 20, and a restricting lever 21 is integrally formed with the restricting lever and is used for play, record and reverse. When the play or reverse record mode is selected, the first, second and third step portions 14 of the outer lower cam 14 formed on the lower surface of the cam gear 4 are selected.
The contact protrusion 21a for rotating the regulating lever 21 by sequentially contacting the a, 14b, and 14c is integrally formed on the outer peripheral surface of the regulating lever 21, and formed on the selection lever 18 when the regulating lever is selected. A locking projection 21 that locks the selection lever 18 by being hooked on the locking piece 18a.
b and.

The power transmission means is rotatably provided on the main plate 1 and selectively receives the rotational force of the selection gear 19 to rotate when the FF / REW mode is selected. The first intermediate gear 22 and the second intermediate 22a. When the play, record, reverse play, and reverse record modes are selected, the movable gear 17 is rotatably provided on the main plate 1.
A driven gear 23 that rotates the first intermediate gear 22 by receiving the rotational force of the first intermediate gear 22 and a rotatably mounted main plate 1 that drives the tape in the forward direction while rotating by the rotational force of the first intermediate gear 22. 1 reel gear 24, and 2nd
The intermediate gear 22a is composed of a second reel gear 24a for driving the tape in the opposite direction by the rotational force.

In the apparatus constructed as described above, when the play, record, reverse play or reverse record mode is selected in the stop state, the main gear 2 rotates and therefore the pinch gear 3 also rotates. At this time, the solenoid 6 operates. Since the cam gear 4 meshes with the rotating pinch gear 3, the cam gear 4 also rotates. As a result, the solenoid lever 7 rotates along the cam path of the upper cam 12 formed in the cam gear, and the actuating lever 9 rotates along the cam path of the inner lower cam 13, so that the mode conversion switch operates. Conversion to the selected mode is performed.

That is, FIG. 1 shows a stop state, in which the FF / REW mode is possible. Figure 1
The operation of selecting the FF / REW mode will be described with reference to FIG. When the FF mode is selected, the main gear 2 and the drive gear 15, which are rotatably provided on the main plate 1, rotate counterclockwise under the drive force of a motor (not shown). Due to this rotation direction, the selection gear 19 rotatably provided at the lower end of the selection lever 18 and meshed with the main gear 2 also meshes with the first intermediate gear 22, so that the first reel gear 24 rotates clockwise, which causes Wrap the tape in the forward direction at high speed.

When the REW mode is selected, the F
Contrary to when the F mode is selected, as the main gear 2 and the drive gear 15 rotate clockwise, the selection lever also rotates clockwise around the hinge shaft, so that the selection gear 19 moves to the second position. By engaging with the intermediate gear 22a, the second reel gear 24a is rotated counterclockwise, and the tape is wound in the opposite direction at a high speed.

On the other hand, when the FF / REW mode is selected, the clutch lever 16 receives a force to rotate about the hinge shaft depending on the rotation directions of the main gears 2 and 2 and the drive gear 15, but at this time, the cam gear 4 Is not rotating, the operating lever 9 is not rotating, and the fourth protruding pin formed at the upper end of the clutch lever 16 is in the lower groove 9c formed at the lower end of the operating lever. Since 16a is inserted, the clutch lever 16 cannot be turned as a result.

Next, the operation state when the user play, record, reverse play, and reverse record modes are selected in the stop state where the FF / REW mode as shown in FIG. 1 is possible will be described.

First, when play or record is selected,
Since the main gear 2 and the drive gear 15 both rotate clockwise under the driving force of a motor (not shown), the pinch gear 3 meshed with the main gear 2 rotates counterclockwise. At this time, power is applied to the solenoid 6 provided on the main plate 1 and the magnetic force is lost, so that the spring 5 pulls the solenoid lever 7 closer, which causes the solenoid lever to rotate clockwise about the hinge shaft. Turn a little to.

Accordingly, the first upper projecting pin 7a formed on the upper end of the solenoid lever 7 is disengaged from the first locking portion 12a of the upper cam 12 formed on the upper surface of the cam gear 4 to push the inclined surface. Therefore, the cam gear 4 meshes with the pinch gear 3 while rotating slightly clockwise around the hinge shaft, and receives the rotational force of the pinch gear to rotate clockwise, and at the same time the solenoid lever 7 is rotated.
The first lower projecting piece 7b fixed to the lower end of the pushes one end of the turning lever 11 rotatably provided on the main plate 1 to slightly turn the turning lever clockwise. The state as described above is shown in FIG.

Next, when the cam gear 4 rotates, the contact protrusions 21a formed on the regulating lever 21 form the first, second and third ends 14a, 14b of the outer lower cam 14 formed on the lower surface of the cam gear 4. , 14c are continuously abutted, so that the restriction lever 21 rotates counterclockwise about the hinge shaft while receiving the elastic force of the second torsion spring 20. At this time, while the solenoid lever 7 is further rotated clockwise along the cam path of the upper cam 12 formed on the upper surface of the cam gear 4, the rotating lever 11 is continuously rotated clockwise, so that When the other side of the moving lever pushes the protruding piece 18b formed at one end of the selection lever 18 upward to rotate the selection lever 18 counterclockwise, the regulation lever 21 rotates counterclockwise when the regulation lever 21 rotates counterclockwise. The locking projection 21b formed on the lever moves without being interfered with by the locking piece 18a formed on the upper end of the selection lever 18, and then the locking piece engages with the locking projection 21b formed on the regulation lever 21. It will be.

On the other hand, in the actuating lever 9 rotatably provided on the main plate 1 and elastically provided by the first torsion spring 8, the second projecting piece 9a formed on one side is arranged in the clockwise direction of the cam gear 4. Since it is guided to the cam path of the inner lower portion 13 by the rotation, the clutch lever 16 is rotated counterclockwise while being rotated clockwise, and thereby the clutch lever 16 is rotatably provided at the lower end of the clutch lever and meshes with the drive gear. The moving gear 17 that is engaged also meshes with the driven gear 23. At this time, the mode switch can be played or recorded while the function plate 10 in which the third projecting piece 10a is inserted into the upper groove 9b formed in the upper portion of the operating lever 9 horizontally moves to the right. To work.

This state is as shown in FIG. 3, but the solenoid lever 7 at this time is engaged with the second engaging portion 12b of the upper cam 12 formed on the cam gear 4 by the first upper protruding pin 7a. ing.

Therefore, the rotational force of the drive gear 15 which rotates clockwise with the main gear 2 is transmitted to the moving gear 17 → the driven gear 23 → the first intermediate gear 22 → the first reel gear 24, so that the reel (not shown) is shown. ) Is driven clockwise while the tape is driven in the positive direction,
Play or record depending on the selected mode.

During the mode conversion to the play and record states, the main gear 2 and the drive gear 15 rotate clockwise, as described above, so that the selection lever 18 also rotates clockwise depending on the direction in which this rotational force acts. Although it receives the force to rotate, it cannot rotate because the restriction lever 21 restricts the rotation of the selection lever 18.

A brief description will be given of the case where the user selects the reverse play mode or the reverse record mode. The operating lever 9 is formed in the cam path of the inner lower cam 13 formed on the lower surface of the cam gear 4. The function plate 10 is horizontally moved to the left while rotating in the counterclockwise direction to operate the mode conversion switch so that reverse play and reverse record are possible. At this time, the clutch lever 16 is rotated clockwise. By moving, the moving gear 17, which is rotatably provided at the lower end of the clutch lever and meshes with the drive gear 15, also meshes with the first intermediate gear 22a, so that the rotational force of the drive gear 15 increases. The second intermediate gear 22a is transmitted to the second reel gear 24a, so that the reel does not rotate counterclockwise in the reverse direction. , Or reverse play by the selected mode, the reverse record.

This state is as shown in FIG. 4, but the solenoid lever 7 at this time is the third engaging portion 1 of the upper cam 12 formed on the cam gear 4 by the first upper protruding piece 7a.
Hanging on 2c.

The rotation of the selection lever 18 is restricted when the reverse play and reverse record modes are selected, similarly to when the play and record modes are selected. The reason for this is that the selection lever has the main gear 2 and the drive gear 15. Depending on the rotation direction of the
9 and the second intermediate gear 22a through the second reel gear 24a
By transmitting the rotational force to the tape, it prevents the force opposite to the tape drive direction from acting on the tape during play and record selection, and prevents excessive transfer of the tape that rotates in the opposite direction during reverse play and reverse record. This is because

The rotation restriction of the selection lever 18 continues until the stop is completed by further selecting the stop mode in the play and record mode states or the reverse play and robus record mode states. Even if the stop mode is selected, the motor does not stop immediately, but after it has been driven a fixed number of times and then stops, the tape is excessively transferred during the time from when the stop mode is selected until the motor is completely stopped. This is to prevent this.

[0026]

As described above, when the stop mode is further selected after the completion of the conversion of the play, record, reverse play, and reverse record modes, all the operations are as shown in FIG. Stop at. However, such a conventional mode conversion device is rotatably provided at the lower end of the selection lever when the play, record, reverse play, and reverse record modes are selected in the stop state, and the power is set to FF / REW. Since the selected gear that transmits is always rotated by receiving the rotational force of the main gear, the rotation of the rotating gear causes an overload on the motor to increase power consumption and shorten the life of the device. There was a problem.

The present invention is intended to solve the above-mentioned problems. In the stop state, the selection gear is in contact with the main gear, and the selection gear is disengaged from the main gear when the play, record, reverse play or reverse record mode is selected. As described above, by preventing the overload of the motor during the play, record, reverse play and reverse record, the power consumption is reduced and the life of the device is extended, and the selection of the mode is performed. Upon completion, the flow of the selection lever is prevented so that noise is reduced.

[0028]

According to an embodiment of the present invention for achieving the above object, a reel gear and a main gear that are rotatably axially coupled to a main plate, and a rotary gear that selectively rotates in the rotation direction of the main gear. A moving selection lever,
The selection gear is formed at one end of the selection lever and selectively meshes with the main gear to rotate the selection gear for rotating the tape reel to a reel gear and to rotate a certain amount each time the recorder is switched to a different mode. Cam gear,
A pinch gear that selectively transmits the turning power of the main gear to the cam gear, a transmission lever that is rotatably provided on the same axis as the pinch gear, and a solenoid lever that initially rotates the cam gear when the play or record mode is selected. And a selection lever sliding means for moving the selection lever downward to select it when the selection gear is idle, and a selection lever sliding means for separating the engagement between the selection gear and the main gear. .

[0029]

EXAMPLES Example 1 of the present invention will be described below with reference to FIGS. 5 to 8 and 9. 5 to 8 are plan views showing the mode conversion device of the cassette tape recorder of the present invention, and FIG. 9 is an enlarged view of the essential parts showing the position state of the selected gear when the stop mode is selected in the FF / REW mode. is there.
The same parts as those of the conventional structure are omitted, but the same reference numerals as those of the conventional structure are used in the drawings.

Explaining the main structure of the present invention, a transmission lever 31 is rotatably provided coaxially with the pinch gear 3 so that when the play, record, reverse play or reverse record mode is selected, the transmission lever is a solenoid lever. 7
In addition to being able to receive the turning power of
It receives the turning force of the cam gear 4 so that it can be rotated secondarily,
A selection lever 32 is provided on the hinge shaft of the main gear 2 so as to be movable up and down, and the selection lever is the transmission lever 31.
Next time the power is moved to move downward, the selection lever 32
The selection gear rotatably mounted on the main plate 1 is disengaged from the main gear 2, and the stopper 34 is attached to the main plate 1.
When the play, record, reverse play, and reverse record modes are selected, the selection lever 32 is brought into contact with the stopper 34 in a state in which the selection lever 32 is moved downward by the second power of the transmission lever 31. Do not rotate with.

In the above description, the transmission lever 31 is formed with the one side protruding piece 35 of the transmission lever, and the solenoid lever 7 is formed with the solenoid lever protruding piece 36 to select the play, record, reverse play or reverse record mode. In this case, when the solenoid lever 7 is rotated, the solenoid lever projecting piece 36 is the transmission lever one side projecting piece 35.
By pushing, the transmission lever 31 is primarily rotated.

When the contact lever 37 is formed on the transmission lever 31 and the concave groove 38 is formed on the outer lower cam 14 of the cam gear 4, when the play, record, reverse play or reverse record mode is selected, When the cam gear 4 rotates, the abutment protrusion 37 slips out of the concave groove 38 and is guided by the outer lower cam 14, so that the transmission lever 31
To be rotated secondarily.

Then, a projection 39 is provided at the end of the transmission lever 31.
And a long hole 41 is formed in the upper part of the selection lever 32 so that the projection 39 is inserted, and the hinge shaft of the main gear 2 is formed in the center of the selection lever 32. The guide elongated hole 42 is formed so that the selection lever 32 is moved downward while being guided by the guide elongated hole 42 when the transmission lever 31 is rotated in the primary and secondary directions.

On the other hand, the main plate 1 is formed with a guide cam 43 in the shape of a ladder having a wide upper and a lower narrow area, and the transmission lever 31 has a 1/2.
Next time when the selection lever 32 moves downward due to power,
The hinge shaft of the selection gear 33 rotatably provided on the selection lever is moved downward while being guided by the guide cam 43, and the selection gear 33 is completely moved downward when the selection lever 32 is completely moved. Prevents the first intermediate gear 22 and the second intermediate gear 22a from interfering with each other. A solenoid lever projecting piece 36, a projection 39,
The guide elongated hole 42 constitutes a selection lever sliding means.

In the description of the operation of the present invention having the above-described structure, the parts overlapping with the conventional operation will be omitted, and only the operation of the essential structure of the present invention will be described. In the stop state as shown in FIG. 5, since the solenoid 6 does not rotate the solenoid lever 7, the transmission lever 32 rotatably provided coaxially with the pinch gear 3 also does not rotate.
As a result, the selection lever 32, which is inserted into the hinge shaft of the main gear 2 so as to be movable up and down, is moved upward. At this time, the end portion of the contact protrusion 37 formed on the transmission lever 31 is It is inserted into a groove 37 formed in the outer lower cam 14 of the cam gear 4, and the selection lever 32
A selection gear 33 rotatably provided at the lower end of the gear meshes with the main gear 2.

When the user selects the FF / REW mode in such a state, the main gear 2 rotates in the forward and reverse directions according to the selected mode, and the selection lever 32 causes the hinge of the main gear 2 to move depending on the direction of the rotational force. Since the selection lever 32 rotates forward / reversely about the shaft, the selection gear 33, which is rotatably provided, meshes with the first intermediate gear 22 or meshes with the second intermediate gear 22a to perform the FF / REW mode. Be seen. Since the protrusion 39 at the terminal end of the other side protruding piece 40 of the transmission lever formed on the transmission lever 31 is inserted into the long hole 41 formed on the upper side of the selection lever 32, the selection lever 32 is properly moved. -When rotating in the reverse direction, the projection 39 guides it.

On the other hand, when the play, record, reverse play, or reverse record mode is selected in the stop state, the solenoid 6 provided on the main plate 1 is supplied with power and loses its magnetic force. Is rotated clockwise about the hinge axis by the restoring force of the spring 5. At this time, the solenoid lever protruding piece 36 formed on the solenoid lever 7 is connected to the one side protruding piece 3 of the transmission lever formed on the transmission lever 31.
In order to push 5, the transmission lever 31 moves counterclockwise 1
Next, the outer lower cam 14 formed by the cam gear 4 at the end of the contact protrusion 37 formed on the transmission lever
The projection 39, which is formed at the end of the other side protruding piece 40 of the transmission lever and is inserted into the long hole 41 at the upper end of the selection lever 32, pushes the selection lever slightly downward while slightly slipping out of the concave groove 38 of FIG. Therefore, the selection lever 32 moves downward by a distance proportional to the primary rotation amount of the transmission lever 31 while being guided by the hinge shaft, so that the selection gear 33 rotatably provided at the lower end of the selection lever 32 is moved. A little disengaged from the main gear 2.

This state is as shown in FIG. 8, but in this case, the solenoid 6 rotates the solenoid lever 7 clockwise to initially engage the cam gear 4 with the pinch gear 3.

Subsequently, since the rotational force of the main gear 2 is transmitted to the cam gear 4 through the pinch gear 3, the play mode, record mode, reverse play mode, and reverse record mode are performed according to the selected mode while the cam gear rotates clockwise. . At this time, the contact protrusion 37 formed on the transmission lever 31 is attached to the outer lower cam 14 of the cam gear 4.
Is completely guided out by the outer lower cam 14 from the inside of the concave groove 38 formed by, so that the transmission lever 31 which has been completed the primary rotation is secondary-rotated, whereby the other protruding piece 40 of the transmission lever on the other side is formed. Since the selection lever 32 is completely moved downward while being guided by the hinge shaft of the main gear 2 by the projection 39 formed at the end of the selection gear 3, the selection gear 3 rotatably provided at the lower end of the selection lever 32.
3 is completely disengaged from the main gear 2. As a result, the rotational force of the main gear is not transmitted to the selection gear 33.

In the above description, when the selection lever 32 moves downward, the guide shaft is guided by the hinge shaft of the main gear 2. That is, the guide elongated hole 42 is formed at the center of the selection lever 32 so that the selection lever 32 is inserted into the hinge shaft of the main gear 2. Is possible because it is

When the stop mode is selected in the FF mode as shown in FIG. 9A, the selection lever 3
A guide cam 4 having a ladder shape in which a hinge shaft of a selection gear 33 rotatably provided at the lower end of 2 is formed on the main plate 1.
3 and the selection gear 32
Is connected to the main gear 2 and the first intermediate gear 22, and when the stop mode is selected in the REW mode state as shown in FIG. 9B, a selection rotatably provided at the lower end of the selection lever 32. The hinge shaft of the gear 33 abuts on the left upper part of the ladder-shaped guide cam 43 formed on the main plate 1, and the selection gear 33 is connected to the main gear 2 and the second intermediate gear 22a. When the play, record, reverse play, or reverse record mode is selected in this state, the selection lever 32
Since the hinge shaft of the selection gear 33 is guided by the guide cam 43 having a trapezoidal shape when is moved downward, the selection lever 3
2 is completely moved downward, the selection gear 32
Of the guide cam 43 is abutted on the lower right side or the lower left side of the guide cam 43, and the upper side of one side surface of the selection lever 32 is formed on the main plate 1.
4 is abutted against 4, and when the play, record, reverse play, or reverse record mode is selected, when the device operates according to the selected mode, the selection lever 32 operates even if the user shakes the device violently. Since it does not flow, the selection gear 33 is not connected to the rotated first intermediate gear 22 or the second intermediate gear 22a, and the noise generated when the mode is selected is reduced.

The hinge shaft of the selection gear 33 is shown in FIG. 9 (a).
When the play, record, reverse play, or reverse record mode is performed in the state where the guide cam 43 is in contact with the lower right part as shown in FIG. It is formed on the main plate 1 that the selection gear 3 is not connected to the rotated first intermediate gear 22 or the second intermediate gear 22a even if the user violently shakes the device voluntarily or intentionally. This is possible because the guide cam 42 that guides the hinge shaft of the selection gear 33 when the lever 32 moves downward has a trapezoidal shape with a wide top and bottom.

On the other hand, FIG. 7 shows a state in which the mode is converted to the play and record when the play and record modes are selected, and FIG. 8 shows the case where the reverse play and reverse record modes are selected. The reverse play mode and the reverse record mode are shown, but a detailed description thereof will be omitted because it will be convincing when referring to the related art.

[0044]

Therefore, according to the present invention, in the stop state, the selection gear rotatably provided on the selection lever is connected to the main gear, and play, record, reverse play,
Since the selection gear is disengaged from the main gear when the reverse record mode is selected, the selection lever does not flow during the play, record, reverse play, and reverse record, so the selection gear does not rotate excessively, and this drives the main gear. There are various effects such as preventing the motor from being overloaded, saving power consumption, and reducing noise during mode selection.

[Brief description of drawings]

FIG. 1 is a plan view showing a mode conversion device of a conventional cassette tape recorder, and is a stop state diagram in which FF / REW mode can be selected.

FIG. 2 is a plan view showing a mode conversion device of a conventional cassette tape recorder, which is a state diagram in which a cam gear is initially meshed with a pinch gear when a play, record, reverse play, or reverse record mode is selected.

FIG. 3 is a plan view showing a mode conversion device of a conventional cassette tape recorder, showing a state in which a play or record mode is selected.

FIG. 4 is a plan view showing a conventional mode conversion device for a cassette tape recorder, showing a state in which a reverse play or reverse record mode is selected.

FIG. 5 is a plan view showing a mode conversion device of the cassette tape recorder of the present invention, and is a stop state diagram in which FF / REW mode can be selected.

FIG. 6 is a plan view showing the mode conversion device of the cassette tape recorder of the present invention, and is a state diagram in which the cam gear is initially meshed with the pinch gear when the play, record, reverse play, or reverse record mode is selected.

FIG. 7 is a plan view showing a mode conversion device of the cassette tape recorder of the present invention, and is a state diagram in which a play or record mode is selected.

FIG. 8 is a plan view showing a mode conversion device of the cassette tape recorder of the present invention, and is a state diagram in which a reverse play or reverse record mode is selected.

FIG. 9 (a) is an enlarged view of an essential part showing the position state of the selected gear when the stop mode is selected in the FF / REW state, when the stop mode is selected in the FF state. (B) An enlarged view of the essential parts showing the position state of the selected gear when the stop mode is selected in the FF / REW state.
It is when the stop mode is selected in the state.

[Explanation of symbols]

 1 Main Plate 2 Main Gear 3 Pinch Gear 4 Cam Gear 7 Solenoid Lever 22 First Intermediate Gear 22a Second Intermediate Gear 31 Transmission Lever 32 Selection Lever 33 Selection Gear 34 Stopper 35 One Side Projection Piece of Transmission Lever 36 Solenoid Lever Projection Piece 37 Abutment Protrusion 39 Protrusion 40 Outer protruding piece of transmission lever 41 Long hole 42 Guide long hole 43 Guide cam

Claims (6)

[Claims] 1. A reel gear and a main gear which are rotatably and axially coupled to a main plate, a selection lever which selectively rotates in a rotation direction of the main gear, and a selective lever which is formed at one end of the selection lever. , A selection gear that transmits the rotational power required to wind the tape reel to the reel gear by meshing with the main gear, a cam gear that rotates a fixed amount each time the recorder changes modes, and a rotation power of the main gear that selectively rotates the main gear. A pinch gear that transmits the power, a transmission lever that is rotatably provided on the same axis as the pinch gear, a solenoid lever that initially rotates the cam gear when the play or record mode is selected, and a selection lever when the selected gear is idle. And the selection lever sliding means for moving the selection gear downward to separate the engagement between the selection gear and the main gear. Mode conversion device of a cassette tape recorder, characterized in that it is made. 2. The selection lever sliding means includes a solenoid projecting piece for selectively rotating the transmission lever 31 primarily, and a projection formed on one end of the transmission lever for pushing the upper portion of the selection lever downward or pulling it upward. 2. The mode conversion device for a cassette tape recorder according to claim 1, further comprising: a guide elongated hole formed in the selection lever and slid by the guide of the main gear shaft. 3. A stopper further formed on the main plate for contacting an upper portion of one side of the selection lever moved downward by the selection lever sliding means to prevent the selection lever from flowing. A mode conversion device for a cassette tape recorder according to claim 1. 4. The mode converting device for a cassette tape record according to claim 2, wherein the transmission lever is provided with a cam gear and an abutment protrusion, and the transmission lever is secondarily rotated by rotation of the cam gear. 5. A guide cam is formed on the main plate,
The rotation shaft of a selection gear rotatably provided on the selection lever is guided by a guide cam when the selection lever moves downward by the next or next power of the transmission lever. The mode conversion device for the cassette tape recorder described in 2. 6. The guide cam is formed in a ladder shape having a wide upper side, a lower side, and a narrow side to prevent the selection gear from being interfered with other surrounding gears in a state where the selection lever has completed the downward movement. The mode conversion device of the cassette tape recorder according to claim 5.