JPS6022756A - Tape recorder - Google Patents

Abstract

PURPOSE:To obtain a compact and light weight tape recorder with a simple constitution where no fault is produced even with a simultaneous operation of plural operation buttons, by giving the priority to the reproduction in case both reproduction and rapid traverse buttons are operated simultaneously. CONSTITUTION:In case an FF button 31 or an REW button 32 and a play button 23 are pushed simultaneously, a head substrate 21 moves forward. Then projected parts 21a and 21b of the substrate 21 have a horizontal touch to each other, and therefore a rapid traverse idle plate 24 is kept at a neutral position. A rapid traverse gear 16 has no engagement with a relay gear 11 together with a left reel driving disk 10. While a play idler plate engages the gear 11 or the disk 10 regardless of the buttons 31 and 32 to secure a play mode. In other words, the priority is given to the button 23 in case the button 31 or 32 and the button 23 are pushed simultaneously.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a tape recorder configured to prevent abnormal operations from occurring when operation buttons are operated simultaneously.

Conventional Structures and Their Problems In recent years, the structure of tape recorders has been simplified, and attempts have even been made to reduce costs by omitting functions. However, since there must be no inconvenience in terms of quality, the operation system must be configured so that there is no logical contradiction when simultaneous operations are performed, for example.

Conventionally, in playback and fast-forward operations, various measures have been taken to prevent the two rotation systems from overlapping because the playback rotation system and the fast-forward rotation system are different when both are operated at the same time.

One method is to provide a blocking member in the operating system so that the operating buttons cannot be pressed at the same time.

However, this method requires a large number of parts for the blocking member itself, and there is also a limit to the strength with which it can be blocked.

Another configuration is that when the operation buttons are pressed simultaneously, the head board is moved by the cue review button and the fast forward button to bring the head and tape into contact.
In addition, in the rotation system, priority is given to fast forwarding. However, even with this configuration, it is necessary to have a double structure so that the head board can be moved both during resetting and fast forwarding, and there is also a need to remove the head board to move it, making the configuration complex and increasing the weight. was there.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional problems, and provides a simple, compact and lightweight tape recorder that is configured to give priority to playback when playback and fast-forwarding are operated at the same time.

Structure of the Invention The present invention provides a play gear that transmits rotation in a reproducing state to a reel stand, a rotation center shaft of the play gear, and a play idler plate having a rotation center on a base plate, and a play gear that transmits rotation in the reel stand in a reel stand. A fast-forwarding gear for transmitting rotation in the fast-forwarding state, a rotation center axis of the fast-forwarding gear, and a fast-forwarding idler plate having a rotation center on a substrate, a magnetic head, and this magnetic head. The tape recorder is provided with a head board that is fixed and moves by a recording/playback operation, the play idler plate and the fast-forward idler plate being able to come into contact with each other at an end of the head board, and the head board is configured to be able to come into contact with the fast-forward idler plate at an end of the head board. When the head board is in the play position, the play idler plate is biased by the head board to interrupt rotation transmission from the play gear to the reel stand, and when the head board is in the play position, the fast-forward idler plate is biased by the head board to transmit rotation from the fast-forward gear to the reel stand. By interrupting the operation, when fast forwarding and playback are operated at the same time, the playback state is given priority, and the tape recorder 2 can be constructed with a simple structure and high safety.

DESCRIPTION OF THE EMBODIMENTS FIG. 1 is a plan view showing a rotating system of a tape recorder in an embodiment of the present invention.

In Figure 1, C is a cassette tape, 1 is a mechanical chassis, 2 is a motor fixed to the mechanical chassis, 3 is an intermediate pulley, 4 is a first flywheel for forward rotation, and 5 is a second flywheel for reverse rotation. , 6 are the motor 2, intermediate pulley 3.
, the 11th second fly hole l, the belt stretched over 5, 7 the take-up side cloth reel stand during forward rotation, 8 the right reel stand 7
9 is the left reel stand on the take-up side during reversal (on the supply side during forward rotation), 10 is the left reel stand 9
A left reel stand gear 11 that is rotatable integrally with the reel stand gear 11 is a relay gear that is rotatably attached to a shaft 12 mounted on the mechanical chassis and is always engaged with the right reel stand gear 8.

13 is a play pulley, and 14 is a play gear, and rotational force is transmitted between the play pulley 13 and the play gear 14 via a friction mechanism (not shown) that sets the winding torque. The play pulley 13 and the play gear 14 are still rotatably attached to a shaft mounted on a play idler plate 17, which will be described later. Numeral 16 is a rapid feed pulley, and 16 is a rapid feed gear, which may be integrally rotatable, but a frixigine mechanism may be provided between them for setting the rapid feed torque. Further, the rapid feed pulley 16 and the rapid feed gear 16 are rotatably attached to a shaft mounted on a rapid feed shear idler plate 24, which will be described later. Rotational force is transmitted to the play pulley 13 and the rapid feed pulley 15 from the groove portion 4a of the first fly hole 4 by a belt 36.

FIG. 2 is a plan view of the portion related to the play state in the stopped state. In FIG. 2, reference numeral 17 denotes a play idler plate that supports the rotating shaft of the play pulley 13, and is rotatably attached to the mechanical chassis 1 about a shaft 18. 19 is a play drive spring, which is fixed on the play idler plate 17. Note that one end thereof faces the forward/reverse switching rod 20 indicated by a broken line. This forward/reverse switching Lorado 20. ij: Although not shown, the rotation is biased to the left during normal rotation and to the right during reverse rotation by a forward/reverse switching mechanism. In FIG. 2, it is shifted to the left in normal rotation.

Reference numeral 21 denotes a head substrate, which fixes the head 22 and is pushed into a play button 23 fixed to one end. Further, the protrusion 21a of the head substrate 21.

21b is in contact with the left and right sides of the play idler plate 17,
Rotation of the play idler plate 17 is prevented.

FIG. 3 is a plan view of the playing state.

FIG. 4 is a plan view of the rotating system in the normal rotation state, and FIG. 6 is a plan view of the rotating system in the reversed state.

FIG. 6 is a plan view of the portion related to the fast forward state in the stopped state. In FIG. 6, reference numeral 24 denotes a fast-feeding idler plate that supports the rotating shaft of the fast-feeding pulley 15, and is rotatably attached to the mechanical chassis 1 around a shaft 25. This rapid feed idler plate 24 has a recess 24.
a is formed. Reference numeral 26 denotes a fast-forwarding auxiliary arm, which is rotatably attached to a shaft 27 mounted on the mechanical chassis 1, and is connected to the recess 24a of the fast-forwarding idler plate 24 and the fast-forwarding 9
By engaging the protrusion 26a of the auxiliary arm, the auxiliary fast-forward arm 26 and the fast-forward idler plate are interlocked. Further, a drive spring 28 is attached to the fast-forwarding auxiliary arm 26.

29 is an FF for fast forwarding during forward rotation (rewinding during reverse rotation)
The rod 3o is a REW rod for rewinding during normal rotation and fast forwarding during reverse rotation, and the FF button 31 and REVv are respectively
The button 32 is press-fitted.

33 is a lock rod, and a protrusion 33a provided integrally therewith.

33b are the FF buttons 31. When the REW button 32 etc. is pressed, the FF rod 29. Claw part 29 of REW rod 30 etc.
a, 30a, the FF button 31. REW
It is possible to check the pressed state of 32 etc. 37 is a stop rod into which a stop button 34 is press-fitted. The stop rod 37 and the lock rod 33 are one biasing spring 3
It is energized at 6. Note that when the stop rod 37 is pushed, the slope portion 37a of the stop rod 37 becomes the protrusion 33c of the lock rod 33.
By coming into contact with the lock rod 33, the biasing spring 36
It is configured to move to the left against the Note that the protrusions 21a and 21b of the head substrate are adapted to come into contact with the rapid feed shear idler plate 24.

Figure 7 shows the plane when the FF button 31 is pushed in, Figure 8 is the plane of the rotation system for forward rotation fast forward (F F), and Figure 9 is the plane of the rotation system for reverse fast forward p (REW, ). It is a diagram. Also the first
FIG. 0 is a plan view with the FF operation button 31 and play button 23 pressed in at the same time.

The operation of the tape recorder of this embodiment configured as described above will be explained below.

First, in the stopped state, as shown in the rotation system of FIG.
21b and is not connected to the gear 10.11, even if the motor 2 rotates, the first. Only the second flywheels 4, 5, play pulley 13, and fast feed pulley 15 rotate, and no rotational force is transmitted to the reel stands 7, 9.

Next, in the forward play state, as shown in FIG. 3, when the play button 23 is pressed from the stop state in FIG. 2, the projection 21b of the head board 21 and the play idler plate 17 maintain a contact state , the play pulley 13 rotates to the right (in the direction of the solid arrow). This rotational force is largely generated by the pulling force of the belt 36 applied to the play pulley 13. FIG. 4 shows only the rotation system during normal rotation play, in which the play gear 14 meshes with the relay gear 11, and the power of the motor is transferred to the gray gear 14 and the relay gear 1.
1 is transmitted to the right reel stand gear 8 and the right reel stand 7. As described above, since the friction mechanism is provided between the play pulley 13 and the play gear 14, the normal winding torque can be set constant.

Next, in the reverse play state, as shown in Fig. 2, the forward/reverse switching rod 20
is biased to the right, and the play pulley 13 is rotated by the play idler plate 17 via the drive spring 19.
moves to the left. In FIG. 3, this is indicated by a dashed arrow.

FIG. 5 shows only the rotation system at this time. The gray gear 14 meshes with the left reel stand gear 10, and the power of the motor is transmitted via the play gear 14, left, and reel stand gear 10 to the left reel stand 9. transmitted to. Since the friction mechanism is provided between the play pulley 13 and the play gear 14 as described above, the winding torque during this reverse play can also be set by the same friction mechanism.

Next, to explain the normal rotation fast-forwarding state, first, in the stop state shown in FIG. Rapid feed auxiliary arm 26
receives a biasing force to rotate counterclockwise, but FF
o Since it is locked to the protrusion 29b of the rad 29, engagement between the fast forward gear 16 and the relay gear 11 is prevented. From this state, when the FF button 31 is pushed in as shown in Fig. 7, the fast forward 9 auxiliary arm 26 follows the projection 29b of the FFo sodorado and rotates counterclockwise, and the interlocking idler plate 24 moves clockwise. Rotate to fast forward gear 16 and relay gear 1
1 meshes.

Figure 8 shows only the rotating system in this state.
The rotational force of the fast-forwarding gear 16 is transmitted via the relay gear 11.
It is transmitted to the right reel stand gear 8 and the right reel stand 7. Note that, as described above, a friction mechanism for setting the fast-forward torque may be installed between the fast-forward shift pulley 18- and the fast-forward shift gear 16, or alternatively, they may be fixed integrally. When they are fixed together, if the winding angle of the rapid traverse pulley 15 and the belt 36 is appropriately set, slip will occur there and a rapid traverse torque can be obtained.

Next, the normal winding restore (reverse fast forwarding) state is a state in which the REW button 32 is pressed in from the state shown in FIG. 6, and is operated as shown by the broken arrow in FIG. 7. REW rod 30
When pushed in, the protrusion 30b engages with the drive spring 28, and the force that overcomes the biasing force of the belt 36 causes the fast-forward auxiliary arm 26 to rotate clockwise, and the fast-forward idler plate 24 to move counterclockwise. Rotate. As a result, the fast forward gear 16 is moved to the left (
(in the direction of the broken line arrow) and engages with the left reel gear 10 as shown in FIG.
transmitted to.

Note that when the FF button 31 and the RE'W button 32 are pushed in at the same time, since the drive spring 28 is stronger, the normal unwinding operation takes priority.

On the other hand, as shown in FIG.
2 and the play button 23 are pushed in at the same time, the head board 21 moves forward and the protrusion 21a,
21b come into contact with each other from the left and right sides, the fast-feed idler plate 24 is kept at a neutral position, and the fast-feed gear 16 is brought into a state where it does not mesh with either the left reel stand 1o or the relay gear 11. On the other hand, the play idler plate is connected to the FF as shown in Figure 3.
Regardless of the button 31 and the REvv button 32, it engages with either the relay gear 11 or the left reel stand 10 and enters the play state. This mechanism is such that if you operate the knob, FF, or REW and play at the same time, play always takes priority.

As described above, according to this embodiment, a special member such as a blocking member is not provided, and by pressing the play button, the fast-forward idler plate, which is unrelated to the play operation, is kept in a neutral state, and the fast-forward gear can be set to either the left or right. The reel stand is also not driven, so when the FF button (or REW button) and play button are pressed at the same time, the play state is realized with priority. That is, it is possible to protect the mechanism during simultaneous operations with a simple configuration without adding any additional members.

Effects of the Invention The present invention is designed to control the rotation of the play idler plate that pivotally supports the play gear and the fast forward shear idler plate that pivotally supports the fast forward shear gear at the end of the head board that moves during recording and playback operations. If playback and fast-forwarding are completed at the same time, the head board prevents the rotation of the fast-forwarding idler plate and interrupts the transmission of rotation from the fast-forwarding gear to the reel stand. It is possible to give priority to the regenerated state without providing any member.

That is, it is possible to prevent abnormalities from occurring during simultaneous operations with a simple configuration, and to realize a highly safe, small and lightweight tape recorder.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a rotating system according to an embodiment of the present invention, FIG. 2 is a plan view of the play drive system in a stopped state, and FIG. 3 is a plan view of the play drive system in a play state. Fig. 4 is a plan view of the rotation system in the normal play state, Fig. 6 is a plan view of the rotation system in the reverse play state, Fig. 6 is a plan view of the fast forward drive system in the stop state, and Fig. 7 is a plan view of the fast forward drive system. Fig. 8 is a plan view of the rotating system in forward rotation, fast forwarding state, Fig. 9 is a plan view of the rotating system in normal rotation and winding failure state, Fig. 10 is the fast forward button and play. FIG. 3 is a plan view of the drive system in a state where the buttons are pressed at the same time. 1...Mechanical chassis, 2...Motor,
4...First flywheel, 6...Second flywheel, 7...Right reel stand, 8...
...Right reel stand gear, 9...Left reel stand,
10... Left reel stand gear, 11... Relay gear, 13... Play pulley, 14...
・Play gear, 16... Rapid feed pulley, 16・
...Rapid gear, 17...Play idler plate, 2o...-Direct/reverse switching rod, 21...
-Head board, 22...Head, R...
Play button, 24...Fast forward idler plate, 26.
...Fast forward auxiliary arm, 29...FF rod, 30...REW rod, 31...
・FF button, 32...REW button, 34...
・Stop button, 36...Belt. Name of agent: Patent attorney Toshio Nakao and 1 other person/6
15 Figure 5 6m Figure 7/6 15

Claims (1)

[Claims] A play gear that transmits the rotation in the playback state to the reel stand, a play idler plate that has the rotation center axis of the play gear set up on the board, and a play gear that transmits the rotation in the fast forward state to the reel stand. A fast-forwarding gear and a rotation center axis of the fast-forwarding gear are installed, a fast-forwarding shear idler plate with a rotational center on a substrate, a magnetic head, and this magnetic head are fixed and moved during recording and playback operations. the play idler plate and the fast-forward idler plate are configured to be able to come into contact with each other at an end of the head substrate, and when the head substrate is at the stop position, the play idler plate is biased by the head substrate to play. Transmission of rotation from the gear to the reel stand is interrupted, and when the head board is in the play position, the head board biases the fast-forward idler plate to interrupt the transmission of rotation from the fast-forward gear to the reel stand, allowing fast-forwarding and playback to occur at the same time. A tape recorder characterized in that it is configured to preferentially enter a playback state when operated.