JPS59139161A - Tape recorder - Google Patents

Abstract

PURPOSE:To simplfy the constitution of a positive/negative rotation switching means and to switch positive and negative rotation smoothly without shifting in changeover timing by allowing an idler lever itself for supporting an idler coupling a capstan with a reel board to execute also the selection of a pinch roller. CONSTITUTION:When a switching member 35 is rotated in the clockwise direction under the positive rotation and constant travelling of a tape, the 1st idler lever 28 rotates clockwise, so that the 1st idler gear 26 is separated from a position between the 1st driving gear 22 and the 1st reel board gear 24 and a part 28b of the idler lever 28 pushes a pin 16 of the 1st pinch roller arm 14 in the arrow B direction to separate the 1st pinch roller from the 1st capstan 2. In accordance with the rotation of the 1st idler lever 28, the 2nd idler lever 29 is also rotated clockwise by a tension spring 34 and the 2nd pinch roller 13 is pressed against the 2nd capstan 3 by the force of a returning spring 19. Thus, the tape is turned into the reverse rotation/constant travelling state.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a reciprocating tape recorder capable of running a tape in both forward and reverse directions.

Conventional configuration and its problems As a method for driving the reel stand in a conventional reciprocating tape recorder, a reel stand driving motor is provided separately from the capstan driving motor, and this motor and a pair of reel stands are connected. A method of selectively connecting a motor and a pair of reel stands by providing a swinging idler between them,
There is a method 3.-I in which the rotational force of a pair of capstans is used and this rotational force is selectively transmitted to a pair of reel stands via an idler. The former method has the advantage that the device can be configured flat and rotational unevenness is reduced, but has the disadvantage that the number of parts increases and the cost increases because a motor for driving the reel stand is used. In addition, in the latter method, a mechanism for selectively pressing a pair of pinch rollers against a pair of capstans was provided independently, resulting in a complicated configuration and two operations: reel stand selection and pinch roller selection. Sometimes the timing wasn't right.

The object of the invention is to solve all of these drawbacks, and to simplify the structure of the forward/reverse switching mechanism, reduce the number of actual parts, and make it inexpensive to assemble. The purpose of this is to allow the parts to be carried out smoothly without any timing lag.

A non-inventive feature of the invention is that the selection of the pinch roller is also performed by the idler lever itself for supporting the idler that connects the capstan and the reel stand.

DESCRIPTION OF THE EMBODIMENTS FIG. 1 shows a tape I/coder according to an embodiment of the present invention in which the tape is running in forward rotation at a constant speed, and FIG. 2 shows a state in which the tape is running in reverse at a constant speed. In the figure, 1 is a mechanism chassis, and on this chassis 1 there are 1. The second capstan 2, 3 and the first capstan. A second reel stand 4.5 is rotatably provided. Further, the head substrate 9 is provided to be slidable in the force direction of arrow AB by the shafts 6, 7.8 on the chassis 1, and the first. Second pinch roller 12.1
3' (z) First and second pinch roller arms 14.15 are rotatably supported. A pin is attached to the end of the first and second pinch roller arms 14.15. 16, 17 are provided, and a torsion spring 18, 19 is suspended between these pins 16, 17 and the head substrate 9, and the first and second pinch rollers 12 and 13 are The capstan 2.3 is biased in the direction of being pressed into contact with the capstan 2.3 of the second capstan.

5 \-1 Furthermore, since the lower ends of the pins 16 and 17 are inserted into the square holes 20 and 21 provided in the head board 9, the head board 9
When the device is in a stopped state in which the pins 16 and 17 are retracted from the position shown in the figure in the direction of arrow B, the pins 16 and 17 are
is pressed down and the pinch rollers 12 and 13 are pressed down and the capstan 2
．． It is held at a position spaced apart from 3.

On the other hand, the above 1. At the lower end of the second capstan 2.3 there is a first capstan. A second drive gear 22,23 is integrally provided. Also number 1. The second reel stand 4.5 also has the first one. Second
Reel platform gears 24 and 25 are provided. 1st. The second reel stand 4.5 and the first reel stand 4.5. Second reel platform gear 24.
25 is connected by a torque limiter (not shown) that is capable of slipping with the winding torque required to wind the tape, and normally rotates at a slip rate several times higher. 26°27
Fi above 1. The second drive gear 22, 23 and the first and second
The first reel is interposed between the reel gears 24 and 25 of the first reel. Second
The rotational force of the capstan is transferred to the first and second reel stands 4 and 6.
There are idler gears 26, 27 for transmitting data to the 1st and 2nd idler levers 28, 29, and these idler gears 26, 27 are rotatably mounted on the shafts 30, 31 of the 1st and 2nd idler levers 28, 29. Above 1. Second idler lever 28
．． 29 is rotatably mounted on a shaft 7.8 on the chassis 1. In addition, the rotation support shaft 30 of the idler gear 26.27
．． 31 is inserted into and engaged with arc-shaped elongated holes 32 and 33 provided in the chassis 1. Also, the above idler lever 28.29
A tension spring 34 is suspended from the ends 28a, 29a of the idler levers 28, 29'i, and urges the idler levers 28, 29'i to approach each other. A switching member 35 is supported between the idler levers 28 and 29 so as to be rotatable about a shaft 36 on the chassis 1. 37 and 38 are the head board 9, idler levers 28 and 29 (D stopper, and 39 is a tape cassette. The first and second capstans 2 and 3 are rotated differently due to the rotational force of a motor (not shown). It is designed to rotate in the direction shown.

Next, the entire operation of the above embodiment will be explained.

In the tape forward rotation constant speed running state shown in FIG. 1, the first 7, -
- The idler gear 26 is interposed between the first drive gear 22 and the first reel base gear 24, and the first reel base 4 is rotated by the rotational force of the first capstan 2. At the same time, the first pinch roller 12 returns to the first capstan 2 with the spring 1
It is pressed with a force of 8.

The tape fed out by the first pinch roller and capstan is wound onto the first reel stand 4 side.

In this case, the second idler gear 27 is the second drive gear 2
3 and the second reel base gear 25, the second reel base 5 is not driven to rotate and functions as a supply reel base for supplying tape. Further, the pin 17 of the second pinch roller arm 15 is pushed in the direction of arrow B by the part 29b of the second idler lever 29, and the second pinch roller 13 is held at a position away from the second capstan 3. ing.

In this state, when the switching member 36 is rotated clockwise, the first idler lever 28 is rotated clockwise, and the first idler gear 26 is moved between the first drive gear 22 and the first reel gear 24. The part 28b of the idler lever 28 touches the pin 16 of the first pinch roller arm 14.
in the direction of arrow B to move the first pinch roller 12 to the first position.
from capstan 2. Along with the rotation of the first idler lever 28, the second idler lever 29 is also rotated clockwise by being pulled by the tension spring 34, and the second idler gear 27 is rotated between the second drive gear 23 and the second idler lever 29. reel gear 2
5, the second reel stand 5 is rotated by the rotational force of the second capstan 3, and the part 29b of the idler lever 29 is connected to the second pinch roller lever 15.
The second pinch roller 13 is separated from the second pin 17.
It returns to the capstan 3 and is pressed by the force of the spring 19.

In this way, the tape is reversed and running at a constant speed as shown in FIG. 2, and the tape moves from the first reel stand 4 to the second reel stand 5
will be driven towards.

From this state, rotate the switching member 35 clockwise to
When the tape is returned to the position shown in the figure, the tape is transferred to the normal rotation constant speed running state described above.

In the above embodiment, power is transmitted between the capstan, the reel stand, and 9<-1 using gears, but this may be replaced by a friction transmission mechanism using a rubber idler or the like.

Effects of the Invention According to the uninvented tape recorder, the pressing and separating operations of the pinch roller with respect to the capstan are controlled by the idler lever for supporting the idler that connects the capstan and the reel stand. The cost can be reduced by simplifying the structure and reducing the number of parts.

The twisted idler lever transmits power between the capstan and reel stand and switches the tape running, so just by increasing the machining accuracy of the idler lever, forward rotation and rotation can be achieved.
Any timing deviation in the operation at the time of reverse switching can be easily eliminated.

[Brief explanation of drawings]

FIG. 1 is a plan view showing a tape recorder in an embodiment of the present invention when the tape is running in forward rotation at a constant speed, and FIG. 2 is a plan view showing the tape recorder in a state in which the tape is running at a constant speed in reverse. 1o <- 2,3°°°°° Capstan, 4.5...
Reel stand, 12.13-old pinch roller, 14.1
5. Old ゛・Pinch roller arm, 26.27...
- Idler gear, 28.29...Idler lever, 35...Switching member. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2

Claims (1)

[Claims] First tapes with different rotational directions are used to run the tape in either forward or reverse directions. a second capstan; The first capstan is selectively pressed against each of the second capstans to cause the tape to run. a second pinch roller; The first and second pinch roller arms rotatably support all of the second pinch rollers, and the first and second pinch roller arms are configured to supply or wind up the tape. a second reel stand; and the first reel stand. 2nd capstan and 2nd + 7-A
z and the first. The rotational force of the second capstan is changed to the rotational force of the second capstan. a first and second idler that transmits information to a second reel stand; The first idlers each rotatably support the second idlers. a second idler lever; and the first idler lever.
A switching member is provided for rotationally biasing the second idler, and by operating the switching member, the first idler is rotated. Selectively connect the second idler to the first idler. the second capstan and the first. The rotational force of the capstan is transmitted to one reel stand by interposing it between the second reel stands so that it rotates, and the corresponding pinch roller is separated from the capstan by an idler lever on the side of the reel stand that is not rotated. A tape recorder configured as follows.