JP2606200B2 - Tape recorder - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape recorder that performs fast-forward / rewind according to the rotation direction of a motor.

2. Description of the Related Art In recent years, while tape recorders have been miniaturized, mechanisms using a solenoid or a motor to provide a light operating feeling have been increasing. Considering miniaturization and cost reduction, we want to operate with less solenoids and motors. Therefore, if the mechanism is stopped and fast-forwarding or rewinding is performed in response to normal rotation or reversal of the motor, and the motor is stopped to stop, the three modes can be performed only by the motor. This can be done by putting a simple friction mechanism in the idler for fast-forward and rewind, but the combination of the solenoid and the intermittent gear causes problems.

The reason is that when the rewinding operation is performed in the rotation direction of the motor on which the intermittent gear operates (hereinafter referred to as forward rotation direction) and in the opposite direction (hereinafter referred to as reverse direction), when the solenoid operates, the intermittent gear operates. Tries to bite from the missing tooth,
Since the motor is reversed, it does not engage and the rattling noise continues. Therefore, conventionally, a solenoid operation detection switch has been provided to detect this state, and when this switch is turned on, the motor is stopped or rotated forward to return to the initial state.

Problems to be Solved by the Invention In the above configuration, since the operating force of the solenoid is used as the operating force of the switch, the actual operating force of the solenoid is reduced. Further, the cost and space of the switch are disadvantageous for miniaturization.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide an electronically operated tape recorder which does not require a switch, minimizes abnormal noise of an intermittent gear, is low in cost, can save space, and has no trouble. It is.

Means for Solving the Problems In order to solve the above problems, the tape recorder of the present invention includes an idler for selecting fast-forward and rewind and transmitting the rotation thereof, and an idler plate rotatably supporting the idler. A motor for driving a rotation system including the idler, and a frictional force between the idler and the idler plate such that the idler plate moves to the fast-forward or rewind position in accordance with the rotation direction of the motor. A suction mechanism that has a structure in which a coil is wound around a magnet, an arm that supports a movable piece that adsorbs to the magnet of the solenoid, and is urged in the opposite direction to the suction direction. A rotating body having an intermittent gear and a cam for determining the operation mode of the tape recorder, the suction force of the solenoid being released, The idler plate is moved by the urging force of the arm only while the intermittent gear of the body is operating, and the rotation system for fast-forward and rewind is cut off.

Effect of the Invention According to the above configuration, even if the solenoid operates when the motor is reversed, the control arm cuts off the rotation system, so even if the operation mode is changed by the intermittent gear of the rotating body, fast forward or rewind even for a moment. It does not become a state. Therefore,
The reel base does not rotate. If the motor does not rotate, the motor stops in the same manner as at the end of the tape.

Example An example of the present invention will be described below.

FIG. 1 is a perspective plan view showing the overall outline of a tape recorder according to an embodiment of the present invention, and FIG. 1 is drawn with overlapping lines so that the entire engagement relationship can be understood. The relationships are consistent (all plan views below are perspective views). In the figure, reference numeral 1 denotes a tape cassette, which is almost completely contained in the projection plane by all mechanisms. Reference numeral 2 denotes a motor, and rotational force is transmitted by a belt 7 to the intermediate pulley 3, the main pulley 4, the forward flywheel 5, and the reverse flywheel 6. 5a and 6a are forward and reverse capstans, respectively.

FIG. 2 shows only the rotary system of the present embodiment, and this rotary system will be described next. The rotational force is transmitted from the small gear 4a of the main pulley 4 to the main gear 8. 9
Is an idler gear for fast-forwarding and rewinding, which is always meshed with the main gear 8 and can take a position including the illustrated state and the neutral position. In the illustrated position, rotation is transmitted to the right reel gear 11 via the relay gear 10. And it is in the fast forward state. On the other hand, at the position 9 'past the neutral position, the relay gear
The rotation is transmitted to the left reel gear 13 via 12 to be in a rewinding state. However, at this time, the motor 2 is in the reverse state, and in other cases (fast-forward and reproduction states), the motor 2 is in the normal rotation state (see the arrow in the figure).

Next, rotation transmission of the reproduction system will be described. The power is transmitted from the main gear 8 to a main small gear 14 provided concentrically therewith and via a friction mechanism (described later).
From 14, it is transmitted to the play gear 15. The play gear 15 is always engaged with the main small gear 14, and the state of the illustrated neutral position, the position engaged with the relay gear 10, and the relay gear
At a position where the play gear 15 meshes with the relay gear 10, the gear is transmitted to the right reel gear 11, and a forward rotation winding state is established. On the other hand, at the position where the play gear 15 meshes with the relay gear 16, the transmission is transmitted to the left reel gear 13 via the relay gear 12, and a reverse rewind winding state is set. In this reproducing state, the motor 2 is in the normal rotation state (shown) at any position.

Reference numeral 17 denotes a reduction gear, which has a two-stage shape having a gear and a small gear that always mesh with the main gear 8, and intermittent cam gear 18 that takes out missing teeth and takes out the power of the reproducing operation (described later).
To transmit the turning force to

Next, the vertical relationship of the above-described friction mechanism and the like will be described with reference to FIG. 3 showing a sectional view of the rotating system. It is transmitted from the belt 7 to the main pulley 4, from the small gear 4a to the main gear 8, from the main small gear 14 to the play gear 15, further from the relay gear 10 or 12 to the reel base gear 11 or 13, and to the coaxial reel base 19. You. Here, the play gear 15 and the idler gear 9
Are supported by shafts on a play plate 20 and an idler plate 21, respectively, and the other gears and pulleys are an upper substrate 22 and a lower substrate 23.
It is supported on the upper shaft. Further, as shown in FIG. 3, the friction mechanism of the main gear 8 has a main small gear.
The pulley 24 and the main gear 8 which are press-fitted into 14 and rotate integrally
Is provided between the main gear 8 and the main small gear 14 by holding the felt 25 with a spring 26.
And the torque is transmitted. With this mechanism, the rotating force is transmitted with a constant torque from the constant rotation of the motor 2 to the changing rotation speed of the reel base 19.
Further, the idler gear 9 creates a frictional force between the idler plate 21 and the idler plate 21 by a spring 27, and attempts to move the idler plate 21 in the rotation direction of the main gear 8.

Next, the relationship between the lever and the rods is shown in FIG.
A description will be given according to (b). The aforementioned idler plate 21 is guided by the shafts 28 and 29 on the lower substrate 23 and rotates about the center of the main gear 8, whereby the friction of the idler gear 9 causes the rotation direction of the main gear 8 to rotate. To rotate. The play plate 20 is also configured to rotate about the center of the main gear 8, and the play gear 15 on the play plate 20 meshes with the relay gear 10 or 16 described above.
The reproduction substrate 30 is guided by the axes 31 and 32 on the lower substrate 23,
It is urged rearward (downward in the figure) by a return spring 33. Further, the shaft 34 on the recycled substrate 30 is engaged with an inner cam (described later) of the cam gear 18, and the recycled substrate 30 is moved forward and backward according to the rotation angle of the gum gear 18. Numeral 35 denotes a normal / reverse rod, and engagement pieces 35d and 3 for guide holes 30a and 30b on the reproduction substrate 30 are provided.
The fitting of 5e moves in the left-right direction with respect to the reproduction substrate 30, but is regulated in the front-back direction. Reference numerals 36 and 37 denote pinch rollers for forward and reverse rotation, respectively.
The engagement pieces 35a and 35b formed at the ends of the rod 35 selectively engage with the right and left rods 35 in accordance with the left and right movement. That is, when the forward / reverse rod 35 moves to the right and the reproduction substrate 30 advances by the cam gear 18, the right forward pinch roller 36 moves to the right, and when the reproduction substrate advances to the left and the reproduction substrate moves forward, the left inversion pinch roller 37 moves,
Each of them is selected and moved forward to make pressure contact with the capstans 5a and 6a. The engagement piece 30c formed at one end of the reproduction substrate 30 is engaged with the hole 20a of the play board 20, and when the reproduction substrate 30 is retracted to the stop position, the engagement piece 30c is inclined with the hole 20a. The play plate 20 is held at the neutral position,
Does not engage with the relay gears 16 and 10. Numeral 38 denotes a solenoid arm, and numeral 39 denotes a solenoid plate, both of which use the shaft 29 on the lower substrate 23 as the same rotation axis. A shaft 38a provided at one end of the solenoid arm 38 is engaged with the cam surface of the cam gear 18 to determine the rotation angle of the cam gear 18. Reference numeral 40 denotes a solenoid, which operates as a pair with the movable piece 41. The movable piece 41 is attached to a shaft 38b at the other end of the solenoid arm. Further, the solenoid arm 38 and the solenoid plate 39 are connected by a spring 42, the urging force of the spring 42 is locked by a stopper 38c, and the solenoid arm 38 and the solenoid plate 39 move normally and are urged by a spring 43 in the opposite direction to the solenoid 40. I have. An engagement piece 39a formed at one end of the solenoid plate 39 is engaged with a hole 35c formed in the correct / return rod 35, and the rotation of the solenoid plate 39 causes the correct / return rod 35 to move right and left. Here, the relationship between the solenoid 40 and the movable piece 41 will be described. The solenoid 40 is a coil wound around a magnet, and in a non-energized state, the magnet and the movable piece 41 are attracted, and when the coil is energized, the magnetic force is cut off. It does not adsorb. Here, in the non-sucking state in which the coil is energized, the urging force of the spring 43 wins, and the solenoid arm 38 moves. 44 is referred to as a direction memory rod), and the DM rod 44 is a shaft 45 on the lower substrate 23.
Is guided by the engaging portion 46a of the DM arm 46, and the engaging piece 20b projecting from the play plate 20 is engaged between the bent engaging pieces 44a and 44b formed at one end thereof. Further, a switch movable piece engaging portion 44c is provided on the DM rod 44, and is always engaged with a movable piece of an electric switch Sm (not shown) so that the moving direction of the DM rod 44 can be electrically detected. I have to.
The DM arm 46 is rotatable about a shaft 47 on the lower substrate 23 as a fulcrum. A lock arm 48 having the shaft 47 as a rotation axis
The lock arm 48 is urged clockwise by a spring 49, and one end 48a of the lock arm 48 is
The other end 48b is capable of engaging with the end 21b of the idler plate 21 so as to engage with the end 30d of the zero.

 With the above configuration, the entire operation will be described below.

First, fast forward / rewind will be described. FIG. 5 shows a state of fast-forward (FF) and FIG. 6 shows a state of rewind (REW). The state is switched from the stop state of FIG. 4 according to the rotation direction of the motor 2 as shown in FIG. 5 or FIG. . That is, the idler plate 21 moves rightward by the friction mechanism of the idler gear 9 described in FIG. 5, and is transmitted to the right reel base gear 11 via the relay gear 10. Similarly, in FIG. 6, when the main gear 8 rotates to the left, the idler plate 21 moves to the left, and the rotation is transmitted to the left reel base gear 13 via the idler gear 9.

Next, as for the reproducing operation, FIG. 7 shows normal reproduction and FIG. 8 shows reverse reproduction. Although the operation of the cam gear 18 will be described later, when the reproduction substrate 30 moves forward by the cam of the cam gear 18, the reproduction state in which the forward / reverse rod 35 moves rightward while moving forward is the seventh state.
FIG. That is, the engagement piece 35a at one end of the forward / reverse rod 35 is engaged with the spring member 38a of the right pinch roller 36, and the right pinch roller 36 is pressed against the capstan 5a to feed the tape in the forward rotation direction. In addition, the front left end 35f of the positive / reverse rod 35 is the play board 2
The 0 engaging portion 20c is pushed up, and the play board 20 is rotated clockwise. Then, the aforementioned main gear 8 and main small gear 14
The rotation is transmitted from the friction mechanism to the play gear 15, the relay gear 10, and the right reel gear 11 to wind the tape. On the other hand, the engagement piece 20b of the play plate 20 raises the engagement piece 44b of the DM rod 44, and switches the switch Sm (not shown) by the engagement portion 44c to store the forward rotation state. In this state, the engaging piece 44a of the DM rod 44 and the play plate 2
Based on the relationship of the play size of 0b, the DM rod 44 and the switch Sm are kept held (no force is applied) and the previous reproduction state is stored in the normal rotation state or the reverse rotation state. That is, the switch Sm keeps the normal rotation unless it is reversed by the next inversion command. The use of the lock arm 48 will also be described in detail with a cam operation described later, but the lock arm 48 is rotated while one end 48a is in contact with the end 30d of the reproduction substrate 30 as shown in FIG. The other end 48b locks the end 21b of the idler plate 21. That is, in the playback state, the main gear 8 always rotates to the right.
The lock arm 48 also prevents the lock 21 from rotating to the right and fast-forwarding.

The same applies to the inverted state of FIG. 8, in which the forward / backward rod 35 moves to the left and the regenerating substrate 30 moves forward, the left pinch roller 37 moves forward, and the play plate 20 is engaged with the front right end 35g of the forward / reverse rod 35. Part 2
Pressing 0d rotates the play board 20 counterclockwise. Then, the rotation system is transmitted from the main gear 8 to the play gear 15, the relay gears 16 and 12, and the left reel base gear 13. Further, when the engagement piece 20b of the play plate 20 comes into contact with the engagement piece 44a,
The rod 44 is lowered, and the switch Sm stores the inverted state. Similarly, the DM arm 46 linked to the DM rod 44 also stores the playback state, so that the running direction can be mechanically displayed by the tip 46b. Lock arm 48
Is the same as in FIG.

As shown in FIG. 9, the cam gear 18 has a first cam 18a formed on one surface (referred to as surface A), a second surface (referred to as surface B), a second cam 18b, and a second cam 18b. 3 cam 18c and a first toothless portion 18d
And a second missing tooth portion 18e, and is a gear that operates intermittently. The first cam 18a has a first locking portion 18a-1 for holding a stopped state, a second locking portion 18a-2 for holding a reproduction state, The inclined surfaces 18a-3 and 18a-4, and the inclined surfaces 18a-5 and 18a-
6 and a cam surface 18a-7. The second cam 18b has an engaging portion 18b-1 with which the shaft 34 is engaged at the retreat position of the recycled substrate 30, an engaging portion 18b-2 with which the reciprocating substrate 30 is engaged at the forward position, and both engaging portions. A cam surface 18b-3 is formed between 18b-1 and 18b-2, the radius of rotation of which gradually decreases. Then, the third cam 18c forming the outer cam
Form a concave portion 18c-1, a large-diameter cam surface 18c-2, and a small-diameter cam surface 18c-3 following the large-diameter cam surface 18c-2.

Next, the cam gear 18 configured as described above and the operation related to the cam gear 18 will be described.

The operation will be described with reference to FIG. 10, but the operation is performed in the order of FIGS. (A) to (E). In FIGS. The relationship between the cam 18a on the A surface of the cam gear 18, the solenoid 40, the solenoid arm 38, the solenoid plate 39, and the positive / reverse rod 35 is shown on the right side, and the cams 18b and 18c on the B surface of the cam gear 18, the rod arm 48, 30 shows the relationship between the idler plates 21. FIG. 11 shows a cam diagram of the cams 18a, 18b, and 18c of the cam gear 18, and shows each engagement shaft 38a with respect to the rotation angle on the A-side and the B-th.
34 and the amount of movement of the idler plate 21. A to E in FIG.
10 corresponds to FIGS. 10A to 10E, the left side of FIG. 10 corresponds to the A side view of FIG. 11, and the right side of FIG. 10 corresponds to the B side view. Hereinafter, the operation will be sequentially described.

FIG. 10 (A) shows a state in which the shaft 38a provided at one end of the solenoid arm 38 engages with the first locking portion 18a-1 of the cam 18a on the left cam A surface, and the cam gear 18 has missing teeth. The portion 18d faces the relay gear 17 and the shaft 38b at the other end of the solenoid arm 38
The movable piece 41 is adsorbed and held by the solenoid 40.
Also, one end 39a of a solenoid arm 38 and a solenoid plate 39 which is integrally rotated by a spring 42 are provided with a hole 35c of the forward / reverse rod 35.
, And the forward / backward rod 35 is located on the left side in the figure. On the other hand, on the cam B surface on the right side of FIG. 7A, the shaft 34 on the reproduction substrate 30 is engaged with the second cam 18b, and the one end 21a of the idler plate 21 is in contact with the third cam 18c outside the shaft. ing. In the state shown in FIG. 3A, the idler gear 9 on the idler plate 21 is
Can rotate freely, and the above-described fast-forward or rewind state is possible by forward or reverse rotation of the motor 2.

(A) When the solenoid 40 is energized in the state shown in the figure, (B)
The state is as shown in the figure. That is, the attraction force of the solenoid 40 is lost, and the force of the spring 43 causes the solenoid arm 38 and the solenoid plate 39 to rotate counterclockwise. Then, the shaft 38a is disengaged from the locking portion 18a-1 and comes into contact with the inclined surface 18a-3, and the cam gear
18 is rotated to the state shown in FIG.
Reference numeral 18 meshes with the relay gear 17 and starts rotating clockwise by the rotational force of the motor 2. On the other hand, as shown in the right figure, the solenoid arm
At one end 38d of 38, the idler plate 21 is protruded in the direction of the arrow to prevent the fast forward state.

From the state shown in FIG. (B) to the rotation angle in the state shown in FIG.
The shaft 38a moves along the inclined surface 18a-5 of the cam 18a, and the solenoid arm 38 is returned to the position where the movable piece 41 can be attracted by the solenoid 40 (at that time, the attracted state in FIG. 7C).
The solenoid arm 38 takes two positions depending on whether the solenoid 40 is energized or not at the position shown in FIG. 3C (the state shown on the left side of FIG. 3C). In conjunction with this, the positive and reverse rods 35 also take two positions on the right side 35 'in the energized state and on the left side in the attracted state without energization (left figure). As can be seen from the right side of FIG. 3C, the reproduction substrate 30 hardly advances until the state of FIG. 3C, and the idler plate 21 is moved by the large-diameter cam surface 18c-2 of the third cam 18c. Rotate to the left, and in the figure (B), the solenoid arm
The third cam 18c takes over the role of rotating the idler plate 21 formed by 38.

The rotation angle further advances from the state shown in FIG.
The shaft 34 is moved in the direction of the center of the cam gear 18 by the cam surface 18b-3 of the cam 18b, and the reproduction substrate 30 is advanced. Here, as described in the description of the above-described reproduction state, normal reproduction is performed when the reproduction substrate 30 moves forward with the positive / reverse rod 35 shifted to the right, and reverse reproduction is performed when the reproduction substrate 30 moves forward with the left.
(C) If the power is supplied in the rotational position shown in the drawing, normal rotation reproduction is performed, and if no power is supplied, reverse reproduction is performed. The lower part of FIG. 11 shows the energization pattern.

(D) is a regeneration state, and (C) is a solenoid 40.
Even if the movable piece 41 is separated from the suction position due to
From the figure to the figure (D), it is further returned to the suction position by the cam surface 18a-7 of the cam 18a, and the movable piece 41 is suction-held by the solenoid 40. At this time, the shaft 38a is locked by the locking portion 18a-2 of the cam 18a.
8, the second missing tooth portion 18e faces the relay gear 17, and the transmission of the rotational force of the motor 2 to the cam gear 18 is cut off. Further, the lock arm 48 is rotated at its tip end 30d by the advance of the reproduction substrate 30, and the other end 48b is located closer to the one end 21b of the idler plate 21, and the one end 21a of the idler plate 21 is connected to the cam surface 18c of the cam 18c. Idler plate when changed from -2 to 18c-3
21 rotates slightly, and one end 21b is the other end 4 of the lock arm 48.
Locked to 8b. Even if the recycled substrate 30 is retracted from this state, the lock is held by the spring 49. That is,
Even if the state of FIG. 7D is changed from the reproduction state of FIG. 7D to the state of FIG. This is to solve the problem that the reel base is in the fast-forward state until the motor 2 stops when moving from the playback state to the stop state because the stop state is the same as the fast-forward state. (1), the idler plate 21 is locked, and does not enter the fast-forward state even when shifting from the reproduction state to the stop state.

(D) When the solenoid 40 is energized (stop command) in the state shown in the figure, the lock of the shaft 38a by the locking portion 18a-2 of the first cam 18a of the cam gear 18 is released, and the shaft 38a moves to the inclined surface 18a-4. The cam gear 18 is slightly rotated in contact with the relay gear 17 and the cam gear 18 from the toothless portion 18e to rotate again.
Then, the reproduction substrate 30 is retracted on the surface of the cam B, and the solenoid arm 38 is returned to the suction position by the inclined surface 18a-6 on the surface of the cam A, and the state shown in FIG. In order to return to the stop state (A) from the locked state shown in FIG. (E), that is, the state in which fast forward rewind is possible, the motor 2 is reversed momentarily, and the idler plate 21 moves leftward (counterclockwise) momentarily. The lock of the one end 21b by the lock arm 48 and the other end 48b is released by the urging force of the spring 49.

Regarding the impact resistance, the movable piece 41 is
However, there is a certain limit, since only is adsorbed. (D) In the reproduction state shown in the drawing, the forward / backward rod 35 is disengaged from the engagement piece 39a of the solenoid plate 39 through the hole 35c, so that the balance between the solenoid arm 38 and the solenoid plate 39 is substantially uniform. Has impact resistance. However, in the stop state or the fast forward rewind state (that is, (A), (E)
In the figure, since the positive and reverse rods 35 and the solenoid plates 39 are engaged with the holes 35c and the engagement pieces 39a, the weight of the positive and reverse rods 35 becomes unbalanced. Therefore, as shown in the left side of FIG. 8E, since the solenoid arm 38 and the solenoid plate 39 are connected by a spring 42 as a double structure composed of separate bodies, the forward / reverse rod 35 can be moved by an impact applied to the entire mechanism. Piece 41
Even if it moves to the right from 35 to 35 'in the drawing so as to remove the suction force of the spring, it is absorbed by the spring 42, and only the solenoid plate 39 rotates to the position 39'. Is applied, and since this urging force is smaller than the attraction force of the movable piece 41, the movable piece 41 does not come off.

If the suction is released, only the next operation mode is entered. However, the problem is that if the suction is released when the motor 2 is reversed in the rewinding state, the cam gear 18
Attempts to engage the relay gear 17 from 18d, but since the relay gear 17 is inverted, it does not engage and the rattling operation sound continues. Therefore, as will be described with reference to the right diagram of FIG. 10 (F), the one end 39b of the solenoid plate 39 can be engaged with the one end 21c of the idler plate 21.
Is moved to the left for rewinding, solenoid 40
The one end 39b of the solenoid plate 39 moves the idler plate 21 slightly to the right side by the force that the suction is released, and the idler gear 9 and the relay gear
12 are disconnected. That is, since the reel base does not rotate, the motor 2 stops as in the case of the end of the tape. Therefore, the rattle does not continue and stops in a few seconds.

Furthermore, if the rewind command is repeated while the movable piece 41 is not attracted, the rattling sound will continue for several seconds, so that when the rewind command is first entered, the motor 2 is rotated forward. After turning the cam gear 18 once, the motor 2
By reversing the operation order, this problem is solved. That is, when fast-forwarding and rewinding are organized, when the fast-forward command is issued, the motor 2 is reversely rewound for a moment and then fast-forwarded. Rewind.

As described above, the tape recorder of the present invention is configured to move the idler plate supporting the idler to the fast-forward or rewind position corresponding to the rotation direction of the motor, and determine the operation mode of the tape recorder. A solenoid provided to an arm for controlling a rotating body having a cam and an intermittent gear to suck or non-adsorb a movable piece.When the suction force of the solenoid is released, the idler plate is moved by the urging force of the arm, and fast-forwarding and Since the rotation system for rewinding is cut off, even if the motor is driven in the state where the holding state of the solenoid fluctuates due to external impact etc., even if the operation mode is changed by the intermittent gear of the rotating body, it will be momentary But it doesn't go into fast forward or rewind. Therefore, there is no rotation of the reel base, the motor is stopped as in the case of the end of the tape, and abnormal noise due to the rotating body or the like is immediately eliminated.

Moreover, it is possible to provide a low-cost, space-saving tape recorder without separately providing a switch or the like, which is very effective.

[Brief description of the drawings]

FIG. 1 is a perspective plan view schematically showing the entirety of the tape recorder of the present invention, FIG. 2 is a perspective plan view schematically showing a rotary system, and FIG.
Fig. 4 is a cross-sectional view of the rotary system, Fig. 4 (a) is a perspective plan view showing the entire lever and rods, Fig. 4 (b) is a plan view of the same part, and Fig. 5 is a rotation in the fast-forward state. Perspective plan view of the system,
FIG. 6 is a perspective plan view of the rewinding state, FIG. 7 is a perspective plan view of the same forward reproduction state, FIG. 8 is a perspective plan view of the same reverse reproduction state, FIG. 9 is an explanatory view of the cam gear, Fig. 10 (A)-
(F) is an exploded view of the operation of the cam gear rotating body, and FIG. 11 is a cam diagram. 2 ... motor, 9 ... idler gear, 18 ... cam gear (rotating body), 18a ... first cam, 18b ... second cam,
18c: third cam, 18d: first missing tooth, 18e: second missing tooth, 21: idler plate, 27: spring, 38: solenoid arm, 40: solenoid, 43 …… Spring.

Claims (1)

(57) [Claims] An idler for selecting fast-forward or rewind and transmitting the rotation thereof, an idler plate for rotatably supporting the idler, a motor for driving a rotation system including the idler, and a rotation of the motor. A friction mechanism that creates a frictional force between the idler and the idler plate so that the idler plate moves to the fast-forward or rewind position in accordance with the direction, and a suction solenoid having a structure in which a coil is wound around a magnet, An arm that supports a movable piece that attracts the magnet of the solenoid and is urged in the opposite direction to the attracting direction, and a cam that determines the operation mode of the tape recorder by controlling the connection of the rotational force from the motor by the arm; A rotating body having an intermittent gear, the suction force of the solenoid is released, and the idler plate is moved by the urging force of the arm only while the intermittent gear of the rotating body is operating. , Tape recorder, characterized in that it has to break the fast forward and rewind of the rotating system.