JPH0334134B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a cartridge type tape recorder equipped with a fast forwarding device.

Conventional configuration and its problems Endless tape cartridges are extremely easy to operate, so they are widely used in karaoke and BGM performances. However, because of the functional drawback of not being able to rewind, fast-forward devices have been devised to quickly find the beginning of a song. A conventional example of a fast forwarding device for this cartridge type tape recorder is shown in FIGS. 1 and 2.

FIG. 1 shows an example in which a playback device and a fast-forward device are provided separately. In this case, more parts such as a motor and a board are required, and there are also two cartridge insertion slots, which occupies a large space on the panel surface. An operational problem is that when you insert a cartridge into the playback cartridge insertion slot A and press the play button, it is already in the middle of a song and you want to fast-forward. It is necessary to insert the cartridge into the insertion slot B, perform a cue search, and then insert the cartridge into the playback cartridge insertion slot A again, which requires troublesome loading and unloading of the cartridge.

Next, as shown in Fig. 2, fast forwarding and playback are performed in one insertion slot, but fast forwarding is performed by increasing the rotational speed of the motor using the same drive method used during playback. It is something.
In this case, the limit is that the fast-forwarding speed can be increased to about 2 to 4 times the reproduction speed, and there is a drawback that it takes time to find the beginning. In addition, since the tape is basically pulled at two to four times the speed while it is being played, the tape and head wear out quickly, and there is a fear that the tape and head may be damaged. In addition, the increased load caused by the head and sensing pole and the high speed rotation of the motor caused an increase in the current value. For this reason, an expensive motor with high torque and two speeds was required. In addition, conventional cartridge insertion involves pushing the guide hole of the cartridge until the pinch roller is pressed against the capstan fixed to the chassis, which tends to apply shock to the capstan and pinch roller, which are the most important parts of the drive system. Due to the support, side-to-side play is likely to occur, so the head touch tends to change easily.

Purpose of the Invention The present invention provides a cartridge-type tape recorder in which playback and fast forwarding can be performed through a single cartridge insertion slot, switching between playback and fast forwarding is easy, and priority can be given to the frequently used playback state. The purpose is to provide.

Structure of the Invention The present invention comprises a movable head board, a head and a reproducing capstan, and in a reproducing state, the head board is advanced to bring the reproducing capstan into contact with a pinch roller, and in a fast forwarding state, the head board is retracted. In place of the playback capstan, the fast-forward roller is brought into contact with the pinch roller, and the playback state and fast-forward state are detected, and playback priority is given at the end of the tape or when the power is turned on, corresponding to each state. This is a cartridge-type tape recorder equipped with a control unit that allows

DESCRIPTION OF EMBODIMENTS FIGS. 3 to 12 show embodiments of the present invention. FIGS. 3 and 4 are a plan view and a side view of essential parts showing the reproduction state of the embodiment. In FIG. 3, when the cartridge 1 is inserted on the surface of the chassis 2 along the guide roller 4 provided between the chassis 2 and the tape guide plate 3, the position of the cartridge 1 is regulated by the cartridge stopper 5, and the chassis 2 is inserted. The roller portion 7a of the lock lever 7, which is pulled clockwise by a spring 8 around the shaft 6 which is erected from the shaft 2, pushes the guide hole 1a provided on the side surface of the cartridge 1, thereby changing the position of the cartridge 1. be completely fixed.

In this embodiment, the drive system is constituted by a chassis 2 and a head board 9 provided under the chassis 2. The chassis 2 and the head board 9 are constructed so that the head board 9 can be rotated about a pivot point 10. The head 11 is installed on the head substrate 9 so that it can come into contact with the tape surface of the cartridge 1 from the hollowed out portion of the chassis 2. In addition, the reproduction capstan 12 is connected to the head board 9.
It is held so as to be freely rotatable by a metal boss 13 fixed to it. Between the outer periphery 14a of the flywheel 14 press-fitted into the regeneration capstan 12 and the motor pulley 16 of the motor 15 attached by the motor angle part 9a protruding from the head board 9, there is a A belt 17 is placed on it and given appropriate tension. A cam gear 20 is attached to a gear 18 press-fitted into the capstan 12 and a shaft 19 that is erected from the head board 9. cam gear 20
In the regenerated state, the gears 18 and 18 do not mesh with each other due to the toothless portion 20a of the cam gear 20.

Further, a plunger lever 22 is attached to a shaft 21 erected on the head board 9, and a movable core 36a of a plunger 36, which is also fixed to the head board 9, and one end 22b of the plunger lever 22 are rotatably attached. There is. The other end 22a of the plunger lever 22 comes into contact with a stopper 20b provided near the outer periphery of the cam gear 20, and the cam gear 20
It regulates the clockwise rotation of.

A cam lever 24 is attached to another shaft 23 that is set up on the head board 9, and one end 24b on the cam gear 20 side is attached to the inner cam portion 24 of the cam gear 20.
It abuts at a position slightly below the position closest to the axis of 0c. A roller is attached to the other end 24a of the cam lever 24, and a pressure lever 26 attached to a shaft 25 raised from the chassis 2 is in contact with the roller surface. The pressure lever 26 is pulled clockwise by a spring 27, and when the position of the cam lever 24 in contact with the pressure lever 26 is regulated in the above-described manner, the force of the spring 27 acting on the pressure lever 26 is equal to the force of the cam lever 24.
The force is used to push the head board 9 clockwise through the shaft 23 of the head.

A spring 28 is applied to the head board 9 to try to pull it in the counterclockwise direction, which is the opposite of the above, but the force exerted by the spring 27 is smaller than the force exerted by the spring 27.
The clockwise force of the head board 9 causes the reproducing capstan 19 attached to the head board 9 to abut the pinch roller 29 of the cartridge 1 with a force that provides tape driving force.

Contacts A30a and B30b, which are short-circuited by the sensing tape, are insulated from the respective contacts and the chassis 2, are rotatably attached to the chassis 2, and are lightly pressed against the tape surface by springs. The other end of each fixed spring is used as a terminal. In the reproducing state, the fast-forwarding roller 31 is separated from the drive system by a method described later and is placed at a position on the left side of the reproducing capstan near the head.

Next, FIGS. 5 and 6 show the fast forwarding state of this embodiment. The cartridge 1 inserted between the chassis 2 and the tape guide plate 3 is held in the same state as in the playback state. During playback, a fast forward roller 3 is placed on the left side of the playback capstan 12.
1 was in the position, but the spring 34 pulled the fast-forward capstan metal boss 33 clockwise, and the fast-forward roller 31 press-fitted into the upper part of the fast-forward capstan 34 held by the fast-forward capstan metal boss 33 It comes into contact with the pinch roller 29 of the cartridge 1.

A fast-forward idler 35 is press-fitted into the lower part of the fast-forward capstan 34. Fast forward idler 35
The head board 9 is pulled by a spring 28 so that the outer periphery of the flywheel comes into contact with the inner peripheral surface 14b of the flywheel. The force with which the head board 9 is pulled in the counterclockwise direction by the spring 28 is weaker than the force with which the spring 43 presses the fast-forward roller 31 against the pinch roller 29 via the fast-forward capstan metal boss 33, but each transmits a force. The spring force is set to the required spring force to obtain .

A cam gear 20 attached to a shaft 19 erected on the head board 9 is stopped at a cam gear stopper 20d by one end 22a of a plunger lever 22 attached to a shaft 21 erected on the same head board 9. . Another end 24a of a cam lever 24 attached to a shaft 23 erected on the head board 9 connects to a pressure lever 26 attached to a shaft 25 erected on the chassis 2 and the head board 9.
It is pushed counterclockwise by the spring 28 which pulls it counterclockwise. However, the other end of this cam lever comes into contact with the inner cam portion 20c of the cam gear 20 at a portion slightly before it reaches the farthest point from the axis.

In the fast-forwarding state, the head 11 rotates counterclockwise together with the head board 9 about the pivot point 10 and is separated from the tape surface of the cartridge 1.
Similarly, the reproduction capstan 12 is separated from the tape and the pinch roller. Contact A30a,
The contact B30b is kept in stable contact with the tape by a spring that tends to be pushed back counterclockwise to a greater extent than during playback due to the resistance of the tape being fed at high speed. The motor 15 rotates at the same rotation speed as during playback, and the speed during playback is determined by the difference between the diameter of the capstan 12 and the inner diameter of the flywheel inner surface 14b, and the difference between the idler 35 press-fitted into the fast-forward capstan and the fast-forward roller 31. This results in a speed difference during fast forwarding.

The following explains how to switch between next playback and fast-forward operations. FIG. 7 shows the position of each part of the head board 9 in the reproduced state, and FIG. 8 shows the fast forward state. In FIG. 7, the movable iron core 36a of the plunger that energizes the plunger 36 for a short time is pulled in the direction of the arrow 38, and one end 22b of the plunger lever 22, which is rotatably attached to the movable iron core 36a, is rotated about the shaft 21. Move clockwise. The other end 22a of the plunger lever also moves counterclockwise around the shaft 21, disengaging from the stopper 20b of the cam gear 20, and causing the cam gear 20 to disengage.
Since the cam lever 24 is rotated in the direction of the arrow 41 in the manner described above, the cam end 24b pushes the inner cam portion 20c in the centrifugal direction. Since the contact part of the inner cam part 20c is at the position where the cam starts to descend, the cam gear 20 is in the position indicated by the arrow 40.
is rotated in the direction of Slightly before the cam comes down completely, a stopper of 20d is placed at one end of the plunger lever 2.
2a, the rotation of the cam gear 20 is prevented. During this operation, the cam gear 20 does not mesh with the gear 18 because it is located at the toothless portion 20a of the intermittent gear. Therefore, as the cam lever 24 rotates in the direction of the arrow 41, the entire head base plate 9 is rotated counterclockwise about the pivot point 10 by the spring 28 applied to the spring hook 9b of the head base plate.

FIG. 8 shows a state where the above operations have been completed, and is in a fast forward state. Next, switching from fast forwarding to playback will be explained with reference to FIG. When the plunger 36 is energized again for a short time, the movable iron core 36a is pulled in the direction of the arrow 38 and the plunger lever 22 is turned in the direction of the arrow 39. The contact portion between the inner cam portion 20c of the cam gear 20 and the cam lever 24b is in the downward stroke of the cam surface, and the cam lever 2
4 is rotated counterclockwise due to the regulation of the spring 28 applied to the spring 9b of the head board and the pressure lever 26 attached to the chassis 2, and the plunger lever 22a is rotated against the stopper of the cam gear. 20d, the cam gear 20 is slightly rotated in the direction of arrow 40. When the cam gear 20 is turned a little, the real teeth of the gear 18 and the cam gear 20 begin to engage, and the gear 18 rotates counterclockwise and the cam gear 20 rotates in the direction of the arrow 40. The cam gear 24 that comes into contact with the inner cam of the cam gear 20 as it goes up stroke.
is turned in the direction of arrow 42 by a force greater than the aforementioned reaction force. The cam gear 2 is moved until the plunger lever 22a and the cam gear stopper 20b come into contact.
When 0 rotates, the rotation stops and the reproducing state shown in FIG. 7 is resumed.

Next, a method for replacing the reproduction capstan 12 and the fast-forwarding roller 31 will be explained with reference to FIGS. 9 to 12. FIGS. 9 and 10 show the states of the reproduction capstan 12 and the fast-forwarding roller 31 during reproduction. The fast-forward capstan metal boss 33, which is rotatably attached to a shaft 32 set up on the chassis 2, receives a clockwise force from its spring-loaded portion 33b, but its hook portion 33a Since they are regulated by the chassis portion 9c, the fast-forward capstan 34, fast-forward roller 31, and idler 35 are completely separated from the drive system during playback. Therefore, during regeneration, the motor 15 - belt 17 - flywheel 1
4-Reproduction capstan 12-Pinch roller 29
The driving force is transmitted to.

From this state, when the head board 9 rotates counterclockwise about the pivot point 10, the reproduction capstan 12 moves away from the pinch roller 29. Also, the fast-forward capstan metal boss 33 is also chassis 9c.
The position does not change while the chassis 9d is sliding, and when the chassis 9d starts to make contact at the sliding position, it is pulled clockwise around the shaft 32 by the force of the spring 43. Then, the fast feed roller 31 is pressed against the pinch roller 29, and then the flywheel 14 is retreated by counterclockwise rotation of the head board 9, and the flywheel inner peripheral surface 1
4b and the idler 35 are brought into contact. Since the force of the spring 43 that pulls the fast feed capstan metal boss 33 is stronger than the force of the spring 28 that moves the flywheel 14 backward, the fast feed roller 31 and the capstan 29
Since the pressure between the idler 35 and the flywheel inner circumferential surface 14b is maintained at an appropriate level, the motor 15 - the belt 17 - the flywheel outer circumferential surface 14 during fast forwarding.
a - Flywheel inner peripheral surface 14b - Idler 35 -
The driving force is transmitted to the fast feed capstan 34, the fast feed roller 31, and the pinch roller 29.

This fast-forwarding state is shown in Figure 11 and Figure 1.
This is Figure 2. From this state, when the head board 9 rotates clockwise about the pivot point 10, the flywheel 14 also moves forward. As the flywheel 14 moves forward, the pressure between the flywheel inner peripheral surface 14b and the idler 35 is released, and then the fast-forward capstan metal boss 33 is pushed by the chassis 9d and rotates counterclockwise around the shaft 32. Therefore, the pressure between the fast feed roller 31 and the pinch roller 29 is also released. As the rotation of the head board 9 further progresses, the reproduction state shown in FIG. 9 is returned to. By the above method, the two drive shafts of the reproducing capstone 12 and the fast-forwarding roller 31 are replaced.

Furthermore, switching between fast forward operation and playback operation will be explained in detail. FIG. 13 is a block diagram of the main parts. The play button and fast forward button are on the main body panel, and the cartridge presence detection switch 44 is
Valid only when ON. When the cartridge is inserted, the respective operations can be performed by pressing the play button and fast forward button. Also, from the playback state, pressing the fast-forward button can change the playback state to fast-forward, but the reverse is not possible. When sensing is detected by the contact 30 while the tape is running in the playback state, the motor 15 is stopped.
If sensing is detected while the tape is running in the fast forward state, the plunger 36 is first pulled to advance the head board and return to the playback state, and when the head board position detection switch 45 detects the playback position, the motor 1
5 will be stopped and will stand by in the playback state.

Next, when the tape is removed during playback, the presence/absence detection switch 44 detects the presence of the cartridge and stops the motor. If the tape is removed during fast forwarding, the plunger is pulled to advance the head board in the same way as in the case of sensing detection, and when it is detected that the head board position has become playback, the motor is stopped.

Next, if the power is turned off during a fast forward operation or a switching operation, when the power is turned on again, the regeneration state is set, and then the motor is stopped and put on standby. In this case, make sure the cartridge is inserted when you turn on the power again.
The above operation is performed regardless of whether or not this happens.

Further, even after the fast-forward cueing is completed, that is, after sensing detection, the plunger is pulled to advance the head board and the playback position is detected, it is easily possible to perform playback without stopping the motor.

FIG. 14 shows the control circuit of this embodiment. In FIG. 14, 50 is a start switch, which is a switch for changing from a stopped state to a reproducing state. Reference numeral 51 denotes a fast-forward switch, which is a switch for changing from a stop state or a playback state to a fast-forward state. 52 is a sensing detection switch. 53 is a cartridge presence/absence detection switch. 54 is a head board position detection switch.
55, 57, 61, and 66 are OR gate circuits. 75 is a NOT gate circuit. 73 is NOR
It is a gate circuit. 56, 62, and 70 are flip-flop circuits. Reference numerals 63, 65, and 74 are monostable multivibrators, which output a pulse of time necessary to attract the plunger 67 in response to the rising edge of the input. 60 is a motor. 59
is a transistor. 67 is a plunger. 69 is a transistor.

The operation of the control circuit shown in FIG. 14 will be explained below.

By turning on the start switch 50,
The flip-flop circuit 56 is set, and the output of the flip-flop circuit 56 turns on the transistor 59 via the OR gate circuit 57 and the resistor 58, causing the motor 60 to run and enter the regeneration state. When sensing is detected during playback,
Sensing detection switch 52 is turned on and OR
The flip-flop circuit 56 is reset via the gate circuits 61 and 55, the transistor 59 is cut off, and the motor is stopped.

Also, when the cartridge tape is removed during playback, the cartridge presence detection switch 53 is activated.
OFF, the flip-flop circuit 56 is reset via the NOT gate circuit 75 and the OR gate circuits 61 and 55, the transistor 59 is cut off, and the motor is stopped.

If the fast forward switch 51 is pressed during stop or playback,
When turned ON, the flip-flop circuits 62 and 70
is set and during playback, the flip-flop circuit 56 is simultaneously connected via the OR gate circuit 55.
is reset. The output of the flip-flop circuit 62 is turned into a pulse by the monostable multivibrator 63, which makes the transistor 69 conductive through the OR gate circuit 66, operates the plunger 67, moves the head board 9, and enters a fast-forward state.

At the same time, the output of the flip-flop circuit 70 causes the OR gate circuit 57 and the transistor 59
The motor 60 enters the running state via the . When sensing is detected or the cartridge tape is removed during the fast-forward state, the flip-flop circuit 62 is reset by the output of the OR gate circuit 61, as in the playback state, and the flip-flop circuit 62 is reset.
The inverted output of the monostable multivibrator 65
This generates a pulse, which turns on the transistor 69 via the OR gate circuit 66, operating the plunger 67 and moving the head board from the fast-forward state to the playback state. When the head board has finished moving to the playback state, the head board position detection switch 54 is turned on, and the flip-flop circuit 70
is reset, the transistor 59 is cut off, and the motor 60 is stopped.

Furthermore, when the power is turned on, the input connected to the resistor 71 of the NOR gate circuit 73 is turned OFF due to the time constant of the resistor 71 and capacitor 72.
Further, the other input of the NOR gate circuit 73 turns OFF when the head board position detection switch 54 is OFF, that is, in the fast forward state, the output of the NOR gate circuit 73 turns ON, and the monostable multivibrator 74 generates a pulse. , the transistor 69 is made conductive through the OR gate circuit, causing the plunger 67 to move the head board from the fast-forward state to the playback state.

According to this embodiment, the following effects can be obtained. First, the motor 15 is attached to the head board 9 that performs rotation.
Since the flywheel 14 and the head 11 are mounted, even if the head board 9 moves, the flywheel 14
Since the position of the motor 15 and the motor 15 are always kept the same, stable belt running can be realized. Also head 11
Since the reproducing capstan 12 and the reproducing capstan 12 are also placed on the head board 9, the reproducing capstan 12 and the head 11 can be easily retracted simultaneously for fast forwarding.

In the playback state, the pinch roller pressure is obtained by pressing the playback capstan 12 against the pinch roller 29 of the cartridge 1 positioned by the stopper 5, so the pinch roller pressure is stable and has better followability than before. is obtained. Further, during reproduction, the fast-forward mechanism parts such as the fast-forward roller 31 and the idler 35 are separated from the drive system, so that they do not have an adverse effect on the reproduction. Furthermore, the head board 9 is easily rotated slightly counterclockwise during playback to release the press between the playback capstan 12 and the pinch roller 29, thereby providing a temporary stop function.

Furthermore, the stopper 5 provided on the chassis 2 to receive the front side of the cartridge enables accurate positioning of the cartridge with less left and right play compared to the case where the front side of the cartridge is supported by a conventional fixed capstan. When the cartridge is directly inserted into the head 11, the impact is less transmitted, and the mechanism can be protected even if it falls over when inserting the tape.

Further, in the fast-forwarding state, the head substrate 9 rotates so that the head 11 does not come into contact with the tape surface, thereby eliminating wear on the head and tape.
Since the fast feed is performed by a dedicated fast feed roller 31, a high tape driving force can be obtained even with a low pressing force due to the rubber roller, and there is little influence on the tape. In addition, since the driving force for fast forwarding is extracted from the inner peripheral surface of the flywheel 14, which rotates at the same number of rotations as during playback,
It is possible to easily obtain a circumferential speed of about 10 times in the same direction as the flywheel 14. Moreover, by adopting this configuration, the motor rotation speed can be kept unchanged and the current value can be kept low. In addition, the control unit prioritizes frequently used playback states when switching between playback and fast-forward, making it easy to operate and preventing problems even if the cartridge is pulled out or the power is turned off midway through operation. It is possible to prevent confusion during operation.

Although this embodiment shows an example in which two drive shafts are replaced by one motor, it goes without saying that similar effects can be obtained even if motors are used for each.

Effects of the Invention The present invention provides a movable head board with a head and a reproduction capstan. During reproduction, the head board is advanced and the reproduction capstan is brought into contact with a pinch roller. During fast forwarding, the head board is moved back and the reproduction capstan is moved. Instead, the fast-forwarding roller is configured to come into contact with the pinch roller, and the control unit operates to keep the head board in the playback state or standby at the playback position except during fast-forward operation, in other words, giving priority to the frequently used playback state. This allows for an easy-to-use configuration that eliminates the confusion of switching between fast-forward and playback, and even if the tape cartridge is removed or the power is turned off during fast-forward operation, the playback mode is automatically set when the next use starts. Therefore, it is possible to realize a cartridge type tape recorder with very good operability.

[Brief explanation of drawings]

1 and 2 are perspective views of a conventional karaoke apparatus, FIG. 3 is a plan view of a cartridge-type tape recorder according to an embodiment of the present invention in a playing state, FIG. 4 is a side view thereof, and FIG. 5 is a perspective view of a conventional karaoke apparatus. A plan view of the fast forward state of this embodiment, FIG. 6 is a side view thereof, FIGS. 7 and 8 are plan views of the head board portion during playback and fast forward, and FIG. 9 is a plan view of the main parts in the playback state. Figure 10 is a side view, Figure 11 is a plan view of the main parts in the fast forward state, and Figure 1 is a side view.
2 is a side view thereof, FIG. 13 is a block diagram of the main part, and FIG. 14 is a circuit diagram of the control circuit. 1... Cartridge, 2... Seat, 9...
Head board, 10... Rotation support, 11... Head, 12... Capstan for reproduction, 14... Flywheel, 15... Motor, 17... Belt, 1
8... Gear, 20... Cam gear, 22... Plunger lever, 24... Cam lever, 26... Pressure lever, 29... Pinch roller, 31...
Rapid feed roller, 33... Rapid feed capstan metal boss, 34... Rapid feed capstan, 35...
Idler, 36...Plunger, 42...Cartridge presence detection leaf switch, 43...Head board position detection switch, 50...Start switch, 51...Fast forward switch, 52...Sensing detection switch, 53...Cartridge presence detection Switch, 54... Head board position detection switch, 55... OR gate circuit, 56, 62, 70
...Flip-flop circuit, 60...Motor,
63, 65, 74...monostable multivibrator, 66...OR gate circuit, 67...plunger.

Claims (1)

[Scope of Claims] 1. A head board provided with a head and a playback capstan and configured to be movable between a playback position and a fast-forward position, a tape drive motor, and a drive force of the motor transmitted to the head board for movement. a head board moving means, a detection switch for both positions of the head board, a fast-forward roller that comes into contact with the pinch roller only when the head board moves to a fast-forward position, and a sensing tape that detects the end of the tape in the fast-forward state using a sensing tape. a detection contact; and a control means for controlling the playback state and stop state of the tape at the playback position by driving and stopping the motor, and controlling the moving position of the head board, and the control means controls the tape playback state at the fast forward position. 1. A cartridge type tape recorder characterized in that the head board is returned to the playback position by detecting the end, and then the motor is stopped to bring the tape recorder into a stopped state. 2. A head board provided with a head and a playback capstan and configured to be movable to a playback position and a fast-forward position, a tape drive motor, and a head board movement that transmits the driving force of the motor to the head board to make it movable. means, a detection switch for both positions of the head board, a fast-forwarding roller that comes into contact with the pinch roller only when the headboard moves to the fast-forwarding position, a power switch, a tape cartridge presence/absence detection switch, and driving and stopping of the motor. control means for controlling the playback state and stop state of the tape at the playback position as well as the moving position of the head board; 1. A cartridge-type tape recorder characterized in that when the power is turned on again after being turned off, the head board is set as the playback position and the motor is on standby with the motor stopped.