JPS6276049A - Tape recorder device - Google Patents

Abstract

PURPOSE:To increase the tension of a belt selectively without increasing the power consumption of a drive source by providing the mechanism controlling the belt tension of a belt drive mechanism in interlocking with the automatic reverse mechanism. CONSTITUTION:In the constant tape speed running of the forward state, the 1st cam 23c drives the 2nd control member 21 clockwise in figure and drives the 1st control member 20 counter clockwise in figure. Then the 1st control member 20 moves its intermediate pulley 19 in the direction of a belt to increase the tension of the belt 17 thereby increasing the torque. Further, in the tape constant speed state, when a high speed running operation member is operated, a changeover lever 24 is moved in the arrow A. Thus, the 2nd control member 21 is driven clockwise against the spring force of the spring member 22 to drive the 1st control member 20 counter clockwise, and the intermediate pully 19 is moved in the direction of the belt similarly at the reversing thereby increasing the tension of the belt 17.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a tape recorder device particularly suitable for a cassette tape recorder intended for miniaturization.

[Technical background of the invention and its problems] As is well known, the cassette tape recorder is a small light bicycle, suitable for carrying, and can also be used with headphones.
Way stereo type devices are becoming popular, and there are devices that allow you to enjoy tape playback while walking, for example, by wearing headphones.

At present, such cassette tape recorders have already been miniaturized to the limit by using a single-motor belt drive mechanism, and the next step is to improve their usability, including their operability. Improvements are requested. For this reason, in recent years, devices have been developed that are equipped with an auto-reverse mechanism that automatically switches the tape running direction to improve operability.

[Problems with the Background Art] However, in the case of a cassette tape recorder equipped with an auto-reverse device +14 as described above, a large amount of force is required when changing the tape running direction due to the belt drive mechanism. An auto-reverse mechanism that uses a drive source to switch tape running has a problem in that slip occurs in the belt of the belt drive mechanism, resulting in lateral pressure loss.

For this reason, some models had 11 belt tensions in the belt drive mechanism to prevent the heald from slipping. However, when configured to increase the belt tension in this way, if a small motor is used, the bearing due to the belt side pressure will suffer loss etc., which will inevitably lead to an increase in current, so the motor and bearing will be This has had the problem of shortening the lifespan of parts such as.

[Object of the invention] The present invention was made in view of the above circumstances, and an object thereof is to provide a tape recorder device that has a simple configuration and can improve reliability as much as possible. do.

[Summary of the Invention] That is, the present invention provides a tape recorder device that uses a drive source provided by a belt drive mechanism to drive and control an auto-reverse mechanism that switches tape running. By providing a tension control mechanism for controlling belt tension, the belt tension can be selectively increased without increasing the power consumption of the drive source, thereby achieving the intended purpose.

Embodiments of the Invention Hereinafter, embodiments of the invention will be described in detail with reference to the drawings.

FIG. 1 shows a tape recorder device according to an embodiment of the present invention, in which reference numerals 10 and 11 indicate first and second capstans rotatably disposed on a chassis 12. As shown in FIG.

The first and second capstans 10.11 have first and second pinch rollers (not shown) selectively brought into and out of contact with each other via a tape, and each has a flywheel 13.14 and a gear at its base. 15.16 are fitted. One side of a ring-shaped belt 17 constituting a belt drive mechanism is wound around this flywheel 13, 14, and the other side of this belt 17 is wound around a pulley 18a fitted to the rotating shaft of a drive motor 18. It will be done. and,
An intermediate pulley 1 for tension control is provided at the intermediate portion of this belt 17.
9 is arranged.

The intermediate pulley 19 is rotatably supported at one end of a first control member 2° rotatably disposed on the chassis 12 via a shaft 12a, and the other end of the first control member 20 is The second control member 21 is engaged with the other end of a second control member 21 rotatably disposed on the chassis 12 via a shaft 12b. A spring member 22 is engaged with the second control member 21 so as to apply its spring force in the counterclockwise direction in the figure, and an engaging portion 21a is provided at the intermediate portion of the second control member 21 and corresponds to a reverse gear 23, which will be described later. It is formed by A protruding portion 21b such as an engaging portion is formed at the other end of the second control member 21. This protrusion 2
1b is engaged with a switching lever 24 that is disposed to be movable in the directions of arrows A and B with respect to the chassis 12. This switching lever 24 controls the tape recorder mechanism to a high speed running state in conjunction with the operation of a high speed operating member (not shown), and also urges the second control member 21 to rotate clockwise in the figure.

Further, the reverse gear 23 is rotatably disposed on the chassis 12 in correspondence with the gear 16 of the second capstan 11. This reverse gear 23 has a first
and second notches 23a and 23b are formed at a predetermined interval, and one side thereof has a first cam portion 23c or a second notch portion 23c corresponding to the engaging portion 21a of the second control member 21. It is formed. Further, the first cam portion 23c has a protrusion 23.
d is formed, and this protrusion 23d is inserted into an elongated hole 25a formed at one end of a reverse slider 25, which is disposed so as to be movable in the directions of arrows A and B with respect to the chassis 12.

The other end of the reverse slider 25 is engaged with one end of a first operating member 26 for switching the tape running direction, which is rotatably disposed on the chassis 12 via a shaft 12c. This first operating member 26 has a gear 2 at its intermediate portion.
7 is rotatably attached, and a chassis 12 is attached to the other end.
One end of a second operating member 28 for switching the tape running direction, which is rotatably disposed via the shaft 12d, is engaged. A gear 29 is rotatably attached to the other end of the second operating member 28 .

Further, a second cam portion 2 is provided on the other side of the reverse gear 23.
3e is formed. The second cam portion 23e has first and second locking portions 23f spaced apart from each other at a predetermined interval.

23g is the first and second notch portion 23a.

23b, and one end of the locking member 30 is engaged with the peripheral portion thereof. This locking member 30 is rotatably disposed on the chassis 12 at its middle portion on a shaft 12e, and a spring member 31 is engaged at the other end so as to apply its spring force clockwise in the figure. Then, the first and second locking portions 23f and 23g of the second cam portion 23e are selectively locked in accordance with the tape running direction, and the reverse gear 2
3 to the first and second positions.

Further, a first gear 32 for tape running drive, which is meshed with the gear 15 fitted to the first capstan 10, is rotatably disposed on the chassis 12. is meshed with the second gear 33 for winding. This second gear 33 has the first and second operating members 26
．． Gears 27 and 29 respectively supported by 28 are engaged with each other so as to be able to come into contact with and separate from them.

Furthermore, a pair of reel stands 34 and 35 are rotatably disposed approximately in the center of the chassis 12, and these reel stands 34 and 35 are rotatably arranged.
．． Driving gears 36 and 37 are fitted into the respective parts 35 and 35, respectively.

One of the reel stands 34 has the first operating member 2
A gear 27 supported by 6 is meshed to allow rotational force transmission. The drive gear 37 of the other reel stand 35 is connected to the second operating member 28 via an intermediate gear 38 for changing the rotation direction.
It is meshed with a gear 29 supported by.

That is, the tape recorder device has a gear 29 meshed with a gear 15 fitted to a first capstan via a first gear 32 and a second gear 33 as shown in FIG. In the forward state (forward running state) in which the drive gear 37 of the other reel stand 35 is meshed with the drive gear 37 of the other reel stand 35 via the intermediate gear 38, when the tape constant speed running operation member (not shown) is operated, the motor 18 is first activated. The tape recorder mechanism (not shown) is driven to rotate at a constant speed, and the first pinch roller (not shown) is pressed against the second capstan 11 via the tape, and the other reel stand 35
is rotated at a constant speed, and the tape runs at a constant speed in the forward direction.

When the tape reaches the end of the tape during constant speed running in the forward state and a tape end detection mechanism (not shown) detects this, the lock portion H30 first resists the spring force of the spring member 31 by a biasing means (not shown). The first locking portion 2 of the second cam portion 23e is then rotated counterclockwise in the figure.
Release the lock of 3f. Then, as shown in FIG. 2, the reverse gear 23 is urged to rotate in the counterclockwise direction in the figure by the spring force of the spring member 22 that is engaged with the second control member 21. The second capstan 11
It is meshed with a gear 16 that is fitted on the holder, and is rotated counterclockwise in the figure. At this time, the first cam portion 23c rotationally urges the second control member 21 clockwise in the figure, and rotates the first control member 20 counterclockwise in the figure. This allows the first
The control member 2θ moves its intermediate pulley 19 in the belt direction to increase the tension of the belt 17 and improve the driving force. Then, the gear 15 reaches the second notch 23b of the reverse gear 23, and the meshing with the gear 15 is released. It is locked by the locking part 23g. At the same time, the reverse gear urges the reverse slider in the direction of arrow A with its first cam portion. As a result, the reverse slider rotates the first operating member and the second operating member counterclockwise and clockwise in the figure, respectively, as shown in FIG. The gear, the second gear, and the first gear are meshed with each other so that rotational force can be transmitted to the gear, and a first pinch roller (not shown) is brought into pressure contact with the first capstan 10 via a tape. Thus, the tape recorder mechanism is controlled to be in a reverse state (negative direction running state), and the tape is caused to run at a constant speed in the negative direction.

In addition, in the tape constant speed running state, when a high speed running operation member (not shown) is operated, the switching lever 24 is moved to the arrow A by an operating mechanism (not shown) as shown in FIG.
direction. As a result, the second control member 21 is rotated clockwise in the figure against the spring force of the spring member 22, causing the first control member 20 to be rotated counterclockwise in the figure, thereby causing the above-mentioned reverse operation. Similarly, the tension of the belt 17 is increased by moving the intermediate pulley 19 toward the belt.

At the same time, the tape recorder mechanism is controlled to a high speed tape running state, and the motor 18 is driven to rotate at a higher speed than in the constant speed running state. In this case, during fast forwarding (F F), the rotational force of the motor 18 is applied to the gear 15, the first gear 32,
The signal is transmitted to the drive gear 37 of the other reel stand 35 via the second gear 33, the gear 29, and the intermediate gear 38, and the reel stand 35 is driven to rotate at high speed. Also, rewind Re
At the time of w), the rotational force of the motor 18 is transmitted to the reel stand 3 via the gear 15, the first gear 32, the second gear 33, and the gear 27.
The signal is transmitted to the drive gear 36 of No. 4, and the reel stand 34 is rotationally driven at high speed.

In this way, the tape recorder device is configured so that the tension of the belt 17 of the belt drive mechanism is increased by the tension control mechanism when the auto-reverse mechanism is in operation and when the tape is running at high speed, so highly accurate control is possible. Something,
Reliability is improved as much as possible.

Furthermore, in the tape recorder device, the auto-reverse mechanism is configured to share the starting means with the tension control mechanism, thereby simplifying and improving the configuration as much as possible.
It can also contribute to improvements in size and weight reduction.

In addition, although the above embodiment is applied to a small cassette tape recorder that is compact and lightweight for convenient portability, the present invention is not limited to this, and can be applied to various other tape recorders as well. It is possible. Therefore, it goes without saying that the present invention can be modified in various ways without departing from the spirit thereof.

[Effects of the Invention] As described in detail above, according to the present invention, it is possible to provide a tape recorder device that has a simple configuration and can improve reliability as much as possible.

[Brief explanation of drawings]

FIG. 1 shows a tape recorder device according to an embodiment of the present invention (1) A construction explanatory diagram, and FIGS. 2 to 4 are operation state diagrams shown to explain the operation of FIG. 1, respectively. 10.11...first and second capstans, 12.
... Chassis, 13.14 ... Flywheel, 15
．． 16...Gear, 17...Belt, 18...Motor, 19...Intermediate pulley, 20.21...First and second control member, 22...Spring member, 23... - Reverse gear, 24... Switching lever, 25... Reverse slider, 26... First operating member, 27... Gear, 28... Second operating member, 29... Gear, 30
... Lock member, 31 ... Spring member, 32.33.
...first and second gears, 34.35...reel stand,
36.37... Drive gear, 38... Intermediate gear.

Claims (1)

[Claims] A tape recorder device configured to drive and control an auto-reverse mechanism that switches tape running using a drive source from a belt drive mechanism, comprising a tension control mechanism that controls belt tension of the belt drive mechanism in conjunction with the auto-reverse mechanism. A tape recorder device characterized by: