JPH0334629B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a tape recorder capable of reciprocating recording and playback.

Conventional configurations and their problems In recent years, tape recorders have become smaller and more multi-functional, and some that are small but capable of reciprocating recording and playback are now available. Conventionally, in the winding mechanism of a reel stand, four operating modes are created according to a predetermined operation: forward playback, reverse playback, normal fast forward (reverse rewind), and forward rewind (reverse fast forward). , it requires many speed reduction mechanisms and direction switching mechanisms, and the mechanism occupies a large space.
The number of parts increased, which became a major obstacle to miniaturization and weight reduction, and also led to higher costs.

Purpose of the Invention The present invention solves the above-mentioned problems of the conventional art, and by simplifying the structure and reducing the number of parts, it is possible to carry out the above-mentioned four operation modes while realizing miniaturization, weight reduction, and cost reduction. The purpose is to provide a tape recorder that can perform

Structure of the Invention The present invention includes first and second capstans that rotate in different directions in order to run the tape in both directions, and first and second flywheels that are coaxial with the first and second capstans. A flywheel pulley that rotates integrally with the first flywheel, a right reel base that winds the tape during forward rotation, a right reel base gear that rotates integrally with this right reel base, and this right reel base gear. A relay gear that always meshes and is rotatably attached to the mechanical chassis, a left reel stand that winds the tape when it is reversed, a left reel stand gear that rotates integrally with this left reel stand, and a play that is rotatably attached to the mechanical chassis. An idler plate, a play gear rotatably attached to a shaft mounted on the play idler plate, a play pulley that rotates coaxially with the play gear via a friction mechanism that sets the winding torque, and a mechanical chassis that rotates. A fast-feeding idler plate freely attached, a fast-feeding gear rotatably attached to a shaft planted on the fast-feeding idler plate, a fast-feeding pulley that rotates integrally with the fast-feeding gear, this fast-feeding pulley and the play pulley. The tape recorder is equipped with a belt connecting to the flywheel pulley, and when the play idler plate is selectively rotated to mesh with the relay gear of the play gear, the reel base winding of normal rotation play occurs. When the play gear is engaged with the left reel stand, the reel stand winding of the reverse play is performed, and the fast-forward gear is engaged with the relay gear by selectively rotating the fast-forward idler plate. When the reel head is in the forward direction, the reel head winds up in the forward direction, and when the fast forward gear is engaged with the left reel head, the reel head winds up in the forward direction, and the reel head winds up in the forward direction. It is possible to drive the reel stand in four modes: playback, fast forward, and rewind, and realizes a tape recorder with a simplified configuration and reduced size.

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 Fig. 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, 5 is a second flywheel for reverse rotation, and 6 is a belt stretched between the motor 2, the intermediate pulley 3, and the first and second flywheels 4 and 5; 7 is a right reel stand for take-up during normal rotation; 8 is rotatable integrally with the right reel stand 7; The right reel stand gear 9 is the left reel stand on the take-up side during reversal (the supply side during normal rotation), 10 is the left reel stand gear that can freely rotate together with the left reel stand 9, and 11 is installed on the mechanical chassis. This relay gear is rotatably attached to the shaft 12 and is always in mesh with the right reel stand gear 8.

13 is a play pulley, 14 is a play gear, and rotational force is transmitted between the play gears 14 of the play pulley 13 via a friction mechanism (not shown) that sets the winding torque. Further, the play pulley 13 and the play gear 14 are rotatably attached to a shaft mounted on a play idler plate 17, which will be described later. Reference numeral 15 denotes a rapid-forwarding pulley, and 16 a rapid-forwarding gear. Although these may be integrally rotatable, a friction mechanism for setting rapid-forwarding torque may be provided between them. Further, the rapid feed pulley 15 and the rapid feed gear 16 are rotatably attached to a shaft mounted on a rapid feed idler plate 24, which will be described later. The play pulley 13 and the rapid feed pulley 15 are the pulley portion 4a of the first flywheel 4.
The rotational force is transmitted from the belt 36 to the belt 36.

FIG. 2 is a plan view of the parts 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 a shaft 18 that is installed on the mechanical chassis 1.
It is rotatably mounted around the center. 19 is a play drive spring, which is fixed on the play idler plate 17. Note that one end thereof faces a forward/reverse switching rod 20 indicated by a broken line. Although this forward/reverse switching rod 20 is not shown, it is biased to the left during forward rotation and to the right during reversal by a forward/reverse switching mechanism. In FIG. 2, it is shifted to the left in normal rotation. A head board 21 fixes the head 22 and is pushed in by a play button 23 fixed to one end. In addition, the protrusion 21 of the head board 21
a and 21b contact the left and right sides of the play idler plate 17 to prevent the play idler plate 17 from rotating.

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. 5 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 stop state. In FIG. 6, reference numeral 24 denotes a fast-feeding idler plate that supports the rotating shaft of the fast-feeding pulley 15.
It is rotatably mounted around the center. A recessed portion 24a is formed in this fast-forward idler plate 24. Reference numeral 26 denotes a fast-forwarding auxiliary arm, which is rotatably attached to a shaft 27 mounted on the mechanical chassis 1, and the fast-forwarding auxiliary arm 26 and Interlocks with the fast-forward idler plate. Further, a drive spring 28 is attached to the fast-forwarding auxiliary arm 26.

29 is an FF rod for fast forwarding during forward rotation (rewinding when reversing), and 30 is a REW rod for rewinding during forward rotation (fast forwarding when reversing).
A button 31 and a REW button 32 are press-fitted. 33 is a lock rod, and protrusions 33a, 33 are provided integrally.
b is the claw part 2 of the FF rod 29, REW rod 30, etc. when the FF button 31, REW button 32, etc. are pressed, respectively.
By engaging with 9a and 30a, the FF button 31,
It is possible to lock the pressed state of the REW button 32 and the like.
37 is a stop rod into which a stop button 34 is press-fitted. The stop rod 37 and the lock rod 33 are biased by a single bias spring 35. Note that when the stop rod 37 is pushed, its sloped portion 37a comes into contact with the protrusion 33c of the lock rod 33, causing the lock rod 33 to release the biasing spring 3.
It is configured to move to the left against 5. Note that the protrusions 21a and 21b of the head board are adapted to come into contact with the fast-forward idler plate 24.

Figure 7 is a plan view with the FF button 31 pushed in;
Figure 8 is a plan view of the forward rotation fast forward (FF) rotation system.
FIG. 9 is a plan view of the rotation system for reverse rapid forwarding (REW).

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.
1 is neutralized by the protrusions 21a and 21b and is not connected to the gears 10 and 11, so even if the motor 2 rotates, the first and second flywheels 4 and 5, the play pulley 13, and the fast-forward pulley 15 The rotational force is not transmitted to the reel stands 7 and 9.

Next, in the forward play state, as shown in Figure 3,
From FIG. 2 in the stopped state, when the play button 23 is pressed, the play pulley 13 rotates to the right (in the direction of the solid arrow) so that the protrusion 21b of the head board 21 and the play idler plate 17 maintain a contact state. . This rotating force is 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, where the play gear 14 is the relay gear 1.
1 and the power of the motor is the play gear 14,
Relay gear 11, right reel stand gear 8, right reel stand 7
transmitted to. As described above, since the friction mechanism is provided between the play pulley 13 and the play gear 14, the winding torque for normal rotation can be set constant.

Next, in the reverse play state, the forward/reverse switching rod 20 is biased to the right as shown in FIG. do. In FIG. 3, this is indicated by a dashed arrow. Figure 5 shows only the rotation system at this time, and the play gear 14
is engaged with the left reel stand gear 10, and the power of the motor is transmitted to the left reel stand 9 via the play gear 14 and the left reel stand gear 10. Since the friction mechanism is provided between the play pulley 13 and the play gear 14 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.
The interlocking fast-forward auxiliary arm 26 is urged to rotate counterclockwise due to the tension of The meshing between gear 16 and relay gear 11 is prevented. When the FF button 31 is pushed in from this state as shown in Fig. 7, the fast-forward auxiliary arm 26 follows the protrusion 29b of the FF rod 29 and rotates counterclockwise, and the interlocking idler plate 24 rotates clockwise. The fast forward gear 16 and the relay gear 11 mesh with each other.

FIG. 8 shows only the rotation system in this state, and the rotational force of the fast-forward gear 16 is
1, right reel stand gear 8, right reel stand gear 7
transmitted to. Note that, as described above, a friction mechanism may be installed between the fast-forward pulley 15 and the fast-forward gear 16 to set the torque during fast-forward.
On the other hand, they may be fixed integrally. If they are fixed together, if the winding angle of the fast feed pulley 15 and the belt 36 is set appropriately, slips will occur there.
Rapid traverse torque can be obtained.

Next, the normal rotation unwinding (reverse fast forwarding) state is the 6th
From the state shown in the figure, the REW button 32 is in a depressed state and is operated as shown by the broken line arrow in FIG. When the REW rod 30 is pushed in, its protrusion 30b engages with the drive spring 28, and the belt 36
The fast-feed auxiliary arm 26 rotates clockwise by a force that overcomes the urging force of , and the fast-feed idler plate 24 rotates counterclockwise. As a result, the fast-forwarding gear 16 moves to the left (in the direction of the dashed arrow) and engages with the left reel gear 10 as shown in FIG. 9, so that the rotational force of the motor is transmitted to the left reel stand 9.

Note that when the FF button 31 and the REW button 32 are pushed in at the same time, the drive spring 28 is stronger, so this normal rotation unwinding operation takes priority.

As described above, according to this embodiment, since the rotation of the first flywheel 4 is transmitted to the play pulley 13 and the fast feed pulley 15 by the belt 36, the rotation system is installed near the reel stand. It can be stored and arranged, which is advantageous in terms of space and can realize miniaturization. Furthermore, by rotating the shaft of the play gear 13 and the shaft of the fast-forwarding gear 16, four modes of reel table rotation can be obtained, which simplifies the configuration. In addition, by configuring a friction mechanism between the play gear 14 and the play pulley 13, the winding torque setting mechanism for normal rotation playback and reverse playback can be shared, which leads to a reduction in the number of parts and the effect of cost reduction. There is.

Effects of the Invention According to the configuration of the present invention, driving force is transmitted from the flywheel pulley that rotates integrally with the first flywheel to the play pulley and the fast-forward pulley using one belt, and the driving force is transmitted to the play pulley and the fast-forward pulley by a single belt. By making each of them movable, the entire drive system can be configured in a small space, and it is also possible to drive four reel stands: forward playback, reverse playback, fast forwarding, and rewinding. This makes it possible to achieve significant downsizing. Furthermore, in the above configuration, the friction mechanism that determines the torque for forward and reverse regeneration can be shared, making it possible to further reduce the number of parts in addition to the simple configuration, which has a significant effect on weight reduction and cost reduction. It can provide tape recorders.

[Brief explanation of drawings]

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, FIG. 3 is a plan view of the play drive system in a play state, and FIG. Figure 4 is a plan view of the rotating system in the forward play state, Figure 5 is a plan view of the rotating system in the reverse play state, Figure 6 is a plan view of the fast-forwarding drive system in the stop state, and Figure 7 is the fast-forwarding in the fast-forwarding state. A plan view of the drive system, Figure 8 is a plan view of the rotation system in forward rotation and fast forwarding state,
FIG. 9 is a plan view of the rotating system in the normal rotation and unwinding state. 1... Mechanical chassis, 2... Motor, 4... First flywheel, 5... 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, 15... Rapid feed pulley, 16... Rapid feed gear, 17... Play idler plate, 20... Forward/reverse switching rod, 21... Head board, 22 ...Head, 23...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.

Claims (1)

[Scope of Claims] 1. First and second capstans having different rotational directions for running the tape in both directions, and first and second flywheels coaxial with the first and second capstans; A flywheel pulley that rotates integrally with the first flywheel, a right reel base that winds the tape during forward rotation, a right reel base gear that rotates integrally with this right reel base, and this right reel base gear. A relay gear that always meshes and is rotatably attached to the mechanical chassis, a left reel stand that winds the tape when reversing, a left reel stand gear that rotates integrally with this left reel stand, and a play idler plate that is rotatably attached to the mechanical chassis. The play gear is rotatably attached to a shaft installed on the play idler plate, the play pulley rotates coaxially with the play gear, and the mechanical chassis rotates through a friction mechanism that sets the winding torque. A fast-feeding idler plate that is freely attached, a fast-feeding gear that is rotatably attached to a shaft that is planted on this fast-feeding idler plate,
A fast-forward pulley that rotates integrally with the fast-forward gear, and a belt that connects the fast-forward pulley, the play pulley, and the flywheel pulley, and by selectively rotating the play idler plate, the play gear When the gear is engaged with the relay gear, when the reel table winding is performed for forward play, and when the play gear is engaged with the left reel table,
Perform reel stand winding of reversal play, and
By selectively rotating the fast-feeding idler plate, when the fast-feeding gear is engaged with the relay gear, normal fast-forwarding reel board winding is performed, and when the fast-forwarding gear is engaged with the left reel base, forward rotation winding is performed. A tape recorder characterized in that the reel base can be driven in four modes: normal playback, reverse playback, fast forwarding, and unwinding by winding the reel base. 2. The tape recorder according to claim 1, further comprising a friction mechanism for setting the fast-forward torque between the fast-forward pulley and the fast-forward gear.