JPS60109045A - Cartridge type tape recorder - Google Patents

Abstract

PURPOSE:To easily switch reproducing operation and fast-forward operation to each other by mounting a capstan for reproduction and a head on the same substrate, and moving back the head substrate in the fast-forward operation and releasing a tape from being run by the reproducing capstan. CONSTITUTION:A head substrate 9 provided with a head 11 and a capstan 12 for reproduction rotate over a chassis 2 around a fulcrum 10 of rotation, and the capstan 12 for reproduction is pressed against a pinch roller 29 during the reproducing operation to transmit the driving force of a motor. In this state, a fast- forward capstan 34, fast-forward roller 31, and idler 35 are disconnected from a driving system. When the head substrate 9 in this state is rotated counterclockwise around the fulcrum 10 of rotation, the head 11 leaves the tape surface of a cartridge 1 and the capstan 12 for reproduction also separates the tape and pinch roller 29 to press a fast-forward roller 31 against the pinch roller 29 instead.

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 Structure and Problems Since the entresive tape cartridge is extremely easy to operate, it is widely used in karaoke, BGM performances, and the like. However, due to 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. One operational problem is that when you insert the cartridge into the playback cartridge insertion slot and press the playback button, the song is already in the middle and you want to fast-forward.If you want to fast-forward the song, pull out the cartridge and insert the fast-forward cartridge again. It is necessary to insert the cartridge into the insertion slot B, locate the beginning of the cartridge, and then insert it again into the reproduction cartridge insertion slot A, which requires troublesome loading and unloading of the cartridge.

Next, Fig. 2 shows that fast-forwarding and playback are performed using two insertion slots, and the drive method during playback is shown in Figure 2.
,''=1 to perform fast forwarding 9 by increasing the motor rotation speed.In this case, the fast forwarding speed can only be raised to about 2 to 4 times the playback speed, and the This method has the drawback that it takes a long time to complete the process. Also, since the tape is basically pulled at 2 to 4 times the speed while it is being played, the tape and head wear out quickly, and there is a risk of damaging the tape and head. The increased load caused by the head and sensing pole and the high-speed rotation of the motor caused an increase in the stain flow value.This required an expensive motor with high torque and two-speed variable speed. Cartridge insertion involves pushing the guide hole of the cartridge until the pinch roller is pressed against the capstan fixed to the chassis, which is easy to apply shock to the capstan and pinch roller, which are the most important parts of the drive system. Because of this, there was a drawback that side-to-side wobbling was likely to occur, and the rough contact was likely to change.

OBJECTS OF THE INVENTION The present invention provides a system in which playback and fast forwarding can be performed in one cartridge insertion slot, switching between playback and fast forwarding can be easily performed, and driving force for playback or fast forwarding can be obtained with a low current value. The purpose of the present invention is to provide a cartridge type tape recorder that can be used.

Structure of the Invention In the present invention, a reproduction capstan and a head are placed on the same substrate, and the head substrate is retracted at the time of fast forwarding at 9. At the same time as the reproduction capstan releases the tape running, the tape surface is removed. By separating them, the shimotor current value is reduced and wear of the head and tape is reduced.

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 this embodiment. In FIG. 3, when the cartridge 1 is inserted on the chassis 20 surface along the guide roller 4 provided between the chassis 2 and the tape guide plate 3, the position of the IJ edge 1 is regulated by the cartridge stopper 5. The roller portion 7a of the lock lever 70, which is pulled clockwise by a spring 8 around a shaft 6 that is erected on the chassis 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 substrate 9 provided under the chassis 2. The chassis 2 and the head substrate 9 are configured such that the head substrate 9 can rotate around a rotation fulcrum 10. A 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 cutout portion of the chassis 2.

Further, the reproduction capstan 12 is held by a metal boss 13 fixed to the head substrate 9 so as to be freely rotatable. Between the outer circumferential surface 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 2o is attached to a gear 18 that is press-fitted into the capstan 12 and a shaft 19 that is erected on the head board 9. The cam gear 2° and the gear 18 do not mesh with each other due to the toothless portion 20 & of the cam gear 20 in the regenerated state.

Further, a plunger lever 22 is attached to a shaft 21 erected on the head substrate 9, and a movable core 36a of the plunger 36, which is also fixed to the head substrate 9, and one end 22b of the plunger lever 22 are rotatably attached. There is. Plunger Reno; -22 other end 22a is cam gear 20
The clockwise rotation of the cam gear 20 is regulated by contacting with a stopper 2Qb provided near the outer periphery of the cam gear 20.

A cam lever 24 is attached to another shaft 23 set up on the head board 9, and one end 2 on the cam gear 2o side
4b is in contact with the inner cam portion 20C of the cam gear 20 at a position slightly lower than the position closest to the axis. Cam lever 2
A roller is attached to the other end 24a of the chassis 2, and the roller surface is in contact with a pressure lever 26 attached to a shaft 25 upright on the chassis 2. The pressure lever 26 is pulled clockwise by the spring 27, and when the position of the cam lever 24 is adjusted in the above-described manner, the force of the spring 27 acts on the shaft of the cam lever 24. 23 is used as a force to push the head board 9 clockwise.

A spring 28 is applied to the head board 9 that tries to pull it counterclockwise, which is the opposite of the above, but this force is smaller than the force exerted by the spring 27. The pinch roller 29 of the cartridge 1 is removed by the recycling capstan 19 attached to the head board 9.
are brought into contact with each other using the force obtained from the tape drive force.

Contact A30a is also short-circuited by the sensing tape.
The l contact B50b is insulated from each contact and the chassis 2, and is movably attached to the chassis 2, and is lightly pressed against the tape surface by a spring, and the other end of each fixed spring is It 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 the head position on the left side of the reproducing capstan.

Next, FIGS. 5 and 6 show the fast forward reverse 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, the fast-forward roller 31 was positioned on the left side of the playback capstan 12, but the spring 34 pulled the fast-forward capstan metal boss 33 clockwise.
Fast forwarding 9 held by fast forwarding Shikabuzu tan metal boss 33
Rapid forwarding roller 31 press-fitted into the upper part of the capstan 34
is brought into contact with the pinch roller 29 of the cartridge 1.

At the bottom of the fast-forward capstan 34 there is a fast-forward capstan 35.
is press-fitted. The base plate 9 is constantly pulled by the spring 28 so that the outer circumference of the rapid shear idler 35 and the inner circumferential surface 14b of the flywheel come into contact. The force by which the head board 9 is pulled counterclockwise by the spring 28 is weaker than the force by which the spring 43 presses the fast-forward roller 31 against the pinch roller 29 via the fast-forward shifter tongue metal boss 33, but the force is transmitted. The spring force is set to the amount required to obtain the force.

Cam gear 2 attached to a shaft 19 erected on the head board 9
0 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 set up on the head board 9 is connected to a pressure lever 26 attached to a shaft 25 set up on the chassis 2, and a spring 28 that pulls the head board 9 counterclockwise. will be pushed counterclockwise. However, the other end of this cam lever comes into contact with the inner cam portion 2oc of the cam gear 20 at a portion just before it reaches the farthest point from the axis.

In the fast-forward reverse state, the head 11 rotates counterclockwise together with the head substrate 9 about the rotational fulcrum 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 person 30a.

Contact B50b tends to be pushed back counterclockwise to a greater degree than during playback due to the resistance of the tape being fed at high speed, but stable contact with the tape is maintained by the spring. Note that the motor 15 rotates at the same number of rotations as during playback.
The difference in speed between playback and fast-forward 9 is caused 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 9 capsun and the fast-forward roller 31. A method of switching the fast forward operation will be explained. FIG. 7 shows the position of each component of the head board 9 in the reproduction state, and FIG. 8 shows the fast-forwarded reverse state. In FIG. 7, when the plunger 36 is energized for a short time, the movable core 36a of the plunger 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 core 36a, is centered around the shaft 21. The hour hand moves counterclockwise. The other end 22,a of the plunger lever also moves counterclockwise around the shaft 21, and the cam gear 20 is no longer engaged with the stopper 20b, and the cam lever 24 is turned in the direction of the arrow 41 in the manner described above. Because of the force acting on the inner cam portion 20, one end 24b on the cam side
c f It will push in the centrifugal direction. Since the contact part of the inner cam part 20Q is at the position where the cam starts to descend, the cam gear 2o
is turned in the direction of arrow 4o. Slightly before the cam comes down completely, the 2Qd stop collar is connected to one end of the plunger lever 22a.
Since the cam gear 2o comes into contact with the cam gear 2o, rotation of the cam gear 2o is prevented.

During this operation, the cam gear 2o is an intermittent gear with missing teeth 2Q
a The L gear 18 with the I/C is not engaged. Therefore, as the cam lever 24 rotates in the direction of the arrow 41, the entire head board 9 is rotated around the rotation fulcrum 10 by the spring 28 applied to the spring-loaded portion 9b of the head board. is turned counterclockwise.

When the above operations are completed, the state shown in FIG. 8 is a fast forward state. Next, the switching from fast forwarding to playback will be explained with reference to FIG. Ru. Inner cam portion 20C of cam gear 2o and cam lever 24
The contact part b is located on the downward stroke of the cam surface.
4 is the spring 2 applied to the spring 9b of the head board mentioned above.
8 and the pressure lever 26 attached to the chassis 2, a counterclockwise rotation force is exerted.
By disengaging the plunger lever 22a from the cam gear stopper 20d, the cam gear 20 is slightly rotated in the direction of the arrow 4o.

When the cam gear 20 is turned a little, the gear 18 and the cam gear 20 begin to mesh with each other, and the gear 18 rotates counterclockwise and the cam gear 2o rotates in the direction of the arrow 40. Since the inner cam of the cam gear 20 is in the upward stroke, the cam gear 24 that comes into contact with it is moved by the arrow 4 due to a force greater than the above-mentioned reaction force.
It is turned in two directions. When the cam gear 20 rotates to a position where the plunger lever 22a and the cam gear stopper 2ob abut, the rotation stops and the regeneration state shown in FIG. 7 is resumed.

Next, as shown in FIGS. 9 to 12, the reproduction capstan 12 is
A method of exchanging the fast forward 90-ra 31 will be explained. Figures 9 and 10 show the reproduction capstan 12 during reproduction.
and the state of the fast forward 90-ra 31.

The fast-forwarding capstan metal boss 33, which is rotatably attached to a shaft 32 erected on the chassis 2, receives a clockwise force from its spring-loaded portion 33b.
Since the hook portion 33a is regulated by the chassis portion 9C, the fast-forward capstan 34 and the fast-forward crawler 31. The idler 35 is completely disconnected from the drive system during regeneration. Therefore, during regeneration, the motor 16 - belt 17 - flywheel 14 - regeneration capstan 12
- one driving force is transmitted to the pinch roller 29;

In this state, when the head board 9 rotates counterclockwise about the rotation fulcrum 10i, the reproduction capstan 12 moves away from the pinch roller 29. The twisted fast-forward capstan metal boss 33 also remains in position while sliding on the chassis 9C, and when it starts to come into contact with the chassis 9di at the sliding position, the shaft 3
2 in the clockwise direction by the force of the spring 43.

After setting, the fast forwarding 90-ra 31 is pressed against the pinch roller 29, and then the flywheel 14 is retreated by counterclockwise rotation of the head base plate 9, and the flywheel inner circumferential surface 14b and the idler 35 are brought into contact with each other. . Since the force of the spring 43 that pulls the fast-forward 9 capsun metal post 33 is stronger than the force of the spring 28 that moves the flywheel 14 backward, the fast-forward 90-ra 31, the capstan 29, the idler 35, and the flywheel inner circumferential surface 14b Since the compressive force of
Five driving forces are transmitted to the flywheel inner peripheral surface 14b, idler 35, rapid traverse 9, capstan 34, rapid traverse 90, roller 31, and pinch roller 29.

This fast forward state is shown in FIGS. 11 and 12. In this state, f) When the head base plate 9 rotates clockwise about the rotation fulcrum 10, the flywheel 14 also moves forward. As the flywheel 14 moves forward, the flywheel inner circumferential surface 14b and the idler 35 are released from the press, and then the fast-forwarding engine is pushed counterclockwise around the shaft 32 by pushing the fast-forwarding engine cab screw tongue metal boss 33 against the chassis 9d. Due to the rotation, the pressure between the fast feed roller 31 and the pinch roller 29 is also released. As the rotation of the head substrate 9 further progresses, the reproduction state shown in FIG. 9 is returned to. By the above method, the capstan 12 for reproduction is
Then, the two drive shafts of the fast feed roller 31 are replaced.

According to this embodiment, the following effects can be obtained.

Since the motor 15 and the flywheel 14-head 11 are mounted on the head board 9 which rotates, the positions of the flywheel 14 and the motor 16 are always kept the same even if the head board 9 moves. Stable belt running can be achieved. -i: Since the head 11 and the reproduction capstan 12 are also placed on the head substrate 9, the configuration is such that the reproduction capstan 12 and the head 11 can be easily retreated at the same time for fast forwarding.

In the reproducing state, the pinch roller pressing force is obtained by pressing the reproducing capstan 12 against the pinch roller 29 of the cartridge 1 which is positioned by the stopper 5, so the pinch roller pressing force 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 adversely affect the reproduction. In addition, when the head board 9 is rotated slightly counterclockwise during playback, the playback capstan 1 is
2 and the pinch roller 29 is easily released to provide a temporary stop function.

Furthermore, the stopper 5 provided on the chassis 2 to receive the front of the cartridge enables accurate positioning of the cart A) with less left and right play than when using a conventional fixed capstan to receive the cartridge from the front. 12 or the head 11, the impact is less transmitted, and the mechanism can be protected even if the tape falls over when inserting the tape.

Further, in the fast-forward 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.

Fast forward! Since this is carried out by a dedicated rapid-feeding 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 of the fast forwarding 9 is extracted from the inner circumferential surface of the flywheel 14 which is rotating at the same rotation speed as during playback, it is easy to obtain a circumferential speed of about 10 times that of the flywheel 14 in the same direction. be able to. Furthermore, by adopting this configuration, the current value can be kept low without changing the motor rotation speed.

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.

Effect of the invention.

According to the present invention, the tape load is reduced by moving the head backward from the tape surface during fast forwarding, and the current value of the motor can be reduced. When fast forwarding is performed with the head in contact with the tape, the degree of wear on the tape and head increases as the fast forwarding speed increases, shortening the life of the tape and head, but in the present invention, the head does not contact the tape surface. That worry will be resolved.

Furthermore, by placing the head and the reproducing capstan on the same movable substrate and moving them, it is possible to move both forward and backward at the same time. Also, if the head is touching during fast forwarding, it is necessary to install a muting circuit in the amplifier section to prevent sound from being produced.
This has excellent effects such as eliminating the need for that circuit.

[Brief explanation of the drawing]

1 and 2 are perspective views of a conventional karaoke machine, 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, and FIG.
FIG. 8 is a plan view of the head substrate section during playback and fast forwarding, FIG. 9 is a plan view of the main parts in the playback state, and FIG.
The figure is a side view, FIG. 11 is a plan view of the main part in a fast forward reverse state, and FIG. 12 is a side view. 1...Cartridge, 2...Chassis,
9...Head plate, 10...Rotation fulcrum, 11...Head, 12...Capstan for playback, 14... Fly foil, 15...
...Motor, 17...Bell) -18...
...Gear, 20...Cam gear, 22...
...Plunger lever, 24...Cam lever,
26...Pressure lever, 29...Pinch roller, 31...Fast feed roller, 33...
...Fast forward Shikabu's Tan Metal Boss, 34...
...Fast forward 9 cab ° stun, 35... idler, 36... plunger. Name of agent: Patent attorney Toshio Nakao and 1 other person, licensed attorney Kyosuke Norichika (and others) Figure 1 Figure 2 Figure 4 Figure 6 Figure 7, 98 Figure 8

Claims (2)

[Claims] (1) A cartridge-type tape recorder characterized in that the head is configured to move backward in response to a fast-forward operation, and the head does not come into contact with the tape in the cartridge. (2) A reproduction capstan and a head are configured on the same substrate, and the substrate is moved backward in response to a fast forward operation, so that both the reproduction capstan and the head are separated from the tape. A cartridge type tape recorder according to claim 1.