JPS6131399Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape recorder with a simplified magnetic tape fast forwarding mechanism and rewinding mechanism.

Conventionally, in order to selectively drive reels for fast forwarding and rewinding of magnetic tape, one idler is brought into selective contact with the drive shafts of two reel drive shafts on the winding side and the supply side. Transmission mechanisms are now widely available and in practical use. However, in such a rotation transmission mechanism, at least two actuating levers are required to perform the above-mentioned selection operation;
Two springs are required to bias each actuating lever individually. For this reason, the magnetic tape fast-forwarding mechanism and rewinding mechanism become complicated, resulting in an increase in cost.

The present invention has been devised in view of the above problems, and in particular, the mechanism is constructed so as to selectively perform fast-forwarding and rewinding of the magnetic tape by associating the torsion spring of one operating lever. An object of the present invention is to provide a tape recorder that can simplify the process and achieve low cost.

Hereinafter, the present invention will be explained based on an embodiment shown in the drawings.

In the drawings showing one embodiment, the operational components other than the fast-forwarding mechanism and rewinding mechanism of the magnetic tape and the mechanical chassis are omitted, and only the main components are shown.
Further, FIGS. 1, 2, and 3 described below show the fast forwarding mechanism and the rewinding mechanism as viewed from the back side of the mechanical chassis.

In the figure, 1 is a push button lever for selecting the fast forward mode, and 2 is a push button lever for selecting the rewind mode.These push button levers 1 and 2 are related to a lock mechanism that temporarily maintains the pressed state, although not shown. I'm being forced to do it. At the tips of these push button levers 1 and 2, there are first and second push operation pins 3.
and 4 are respectively provided protrudingly. The left and right front edges in the figure of the substantially triangular interlocking lever 5 are abutted and locked by the pressing operation pins 3 and 4, respectively. A spring locking protrusion 6 is provided on the left front edge of the interlocking lever 5, and a movable pin that serves as a support point for the first torsion spring 12, which will be described later, is fitted on the rear end side. 7 is provided protrudingly. Further, a through hole 8 is bored in the center of the interlocking lever 5, and a support pin 9 erected on the mechanical chassis passes through the through hole 8 and projects therethrough. A second torsion spring 10 is fitted into this support pin 9 . One side 10a of this second torsion spring 10 is locked to the spring locking protrusion 6, and the other side 10a
is erected on the mechanical chassis and is locked to a second fixing pin 11, which will be described later. Therefore, the interlocking lever 5 is connected to each push button lever 1 in the front direction in FIG.
The front end edge is pressed against the first and second push operation pins 3 and 4 protruding from the push button levers 1 and 2.

Note that the spring that biases the interlock lever 5 toward the push button levers 1 and 2 is not limited to the torsion spring 10, but may be a coil as long as it can bias the interlock lever 5 toward the push button levers 1 and 2. Any resilient means such as a spring may be used.

In addition, 13 in the figure is an actuation lever formed in a substantially Y shape, and a long hole 14 is formed in the center of the actuation lever 13, and a slotted hole part 14 is installed in the mechanical chassis in the middle of this long hole part 14. The first one is fixed so that it stands upright.
A fixing pin 15 is inserted therethrough. A first arm portion 13, which is one end of the operating lever 13,
First and second locking protrusions 16 and 17 are provided at a predetermined distance apart. The first locking protrusion 16 is formed by cutting and bending the middle part of the rear edge side of the first arm part 13a, and the second locking protrusion 17 is formed at the tip of the upper first arm part 13a. It is set up so that it is planted in In addition, the operating lever 13
A third locking protrusion 18 is provided on the tip side of the second arm portion 13b, which is the other end. Further, at the tip of the third arm portion 13c, which is the other end of the operating lever 13, there is an idler 20 having an intermediate gear 19 on the back side in the figure.
is mounted rotatably around a support shaft 21.

The first torsion spring 12 is inserted into the movable pin 7 protruding from the interlocking lever 5.
The middle part of one side 12a is locked to the second fixing pin 11, and the other side 12b is locked to the third locking protrusion 18.
It is supported by being engaged with a third fixing pin 22 that extends near the mechanical chassis and is installed on the mechanical chassis. By supporting the first torsion spring 12 in this way, the intermediate gear 19 provided integrally with the idler 20 is connected to the take-up reel gear 23 on the take-up reel drive shaft 24 side, as shown in FIG. Forced in the direction of engagement. Note that the take-up reel drive shaft 24 is connected to the take-up reel gear 23.
It is attached to the back side in the drawing.

In addition, 25 in the figure is a fixed gear which is a rotating body rotatably attached around the first fixed pin 15, and this fixed gear 25 is a supply side reel drive shaft 26 for feeding out the tape. It is always meshed with the reel gear 27. Furthermore, 28 is a flywheel driven by a motor, and a capstan shaft 29 is attached to the center of this flywheel 28. In addition, the flywheel 28
The circumferential surface of the idler 20 faces the circumferential surface of the idler 20 at a constant distance.

Next, the operation of the above-mentioned mechanism will be explained.

First, to explain the case of selecting the fast-forward operation mode, the push-button lever 1 for selecting the fast-forward mode is pushed in the direction of arrow A as shown in FIG. By pressing the push button lever 1, the interlocking lever 5 is pressed by the first pressing operation pin 3. When pressed by this first press operation pin 3, the interlocking lever 5 comes into contact with a second press operation pin 4 protruding from the tip of the rewind mode selection push button lever 2 which is not pressed. It is pushed out so as to rotate in the direction of arrow B in FIG. 2 using the contact position as a fulcrum. As the interlocking lever 5 is pushed out, the movable pin 7 is also displaced in the same direction. Due to this displacement of the movable pin 7, the other side 12b of the first torsion coil spring 12 is separated from the third fixed pin 22 as shown in FIG.
b in the direction of the arrow C.
push in the direction. When this third locking protrusion 18 is pushed out in the direction of arrow C, the actuating lever 13 is moved to the second position.
It is rotated in the counterclockwise direction of arrow D in the figure, and the elongated hole portion 14 moves slightly along the first fixing pin 15. Furthermore, due to this movement, the intermediate gear 19
moves while meshing with the take-up reel gear 23, and the idler 20 is pressed against the flywheel 28 as shown in FIG. Here, the pressed state of the push button lever 1 for selecting the fast forward mode is held by a lock mechanism (not shown). That is, in such a state, the rotation of the flywheel 28 is controlled by the idler 20, the intermediate gear 19, and the winding gear 23.
is transmitted to the take-up reel drive shaft 24 through
The magnetic tape is fast forwarded.

Next, to explain the case of selecting the rewind operation mode, the push button lever 2 for rewind mode selection is pushed in the direction of arrow E as shown in FIG. By pressing the push button lever 2, the interlocking lever 5 is pressed by the second pressing operation pin 4. When pressed by this second press operation pin 4, the interlocking lever 5 comes into contact with the first press operation pin 3 protruding from the tip of the fast-forward mode selection push button lever 1 which is not pressed. It is pushed out so as to rotate in the direction of arrow F in FIG. 3 using the position as a fulcrum. As the interlocking lever 5 is pushed out, the movable pin 7 is also displaced in the same direction. Due to this displacement of the movable pin 7, one side 12b of the first torsion coil spring 12 comes into contact with the second fixed pin 11, and moves in the direction of arrow C in FIG. 3 using the second fixed pin 11 as a fulcrum. It is further deviated, and the second locking protrusion 17 provided on the first arm portion 13b of the operating lever 13 is pushed out in the direction of arrow G. When the second locking protrusion 17 is pushed out in the direction of arrow G, the operating lever 13 is pushed back in the direction of arrow G in FIG. Then, it rotates counterclockwise while being deviated to the front right in Fig. 3. Due to this operation of the operating lever 13, the intermediate gear 19 meshes with the fixed gear 25 as shown in FIG. 3, and at the same time, the idler 20 comes into contact with the outer peripheral surface of the flywheel 28. As a result, the rotation of the flywheel 28 causes the supply reel drive shaft 26 to rotate in the tape rewinding direction through the idler 20, intermediate gear 19, and fixed gear 25, respectively.

In this way, the operation of selecting the fast forward and rewind operation modes can be realized by configuring one operating lever 13 to be biased by one torsion coil spring 12, and this configuration is different from the conventional one. It has the advantage of being simpler. In particular, this configuration is characterized in that by moving the support point of the first torsion coil spring 12, the actuating lever 13 can take two actions, thereby simplifying the configuration and making it more economical. You can get a lot of profit.

As mentioned above, the present invention provides a tape recorder in which fast forward and rewind modes are obtained by moving the idler from an initial position to two different positions by fast forwarding and rewinding operations. It has first and second locking protrusions provided, a third locking protrusion protruding from the other end, and an idler rotatably attached to the remaining other end, and the elongated hole portion is a substantially Y-shaped operating lever supported by a first fixing pin;
and a torsion spring held by a fixing pin of the torsion spring, and a support point of the torsion spring is deflected in one direction by a fast-forwarding operation, and one side of the torsion spring pushes the third locking protrusion. The operating lever is rotated to transmit the rotation of the idler to the take-up reel drive shaft, and the unwinding operation causes the support point of the torsion spring to deviate in the other direction, and the second fixing pin Using the other side of the torsion spring as a fulcrum, the second locking protrusion is pulled in to deflect the operating lever, and the rotation of the idler is transmitted to a rotating body that is constantly meshed with the supply side reel drive shaft. Therefore, it is possible to simplify the mechanism for selecting fast-forward and rewind operation modes, and to provide a tape recorder that can be inexpensive.

[Brief explanation of the drawing]

Fig. 1 shows the main parts of the tape recorder according to the present invention, and is a plan view in an inactive state, Fig. 2 is a plan view in a fast forward operation mode, and Fig. 3 is a plan view in a rewind operation mode. FIG. 1...Push button lever for selecting fast forward mode, 2...
...Push button lever for rewind mode selection, 11...Second fixing pin, 13...Operation lever, 14...Elongated hole, 15...First fixing pin, 16...First locking protrusion , 17... second locking protrusion, 18... third locking protrusion, 20... idler, 22... third
Fixing pin, 24... Winding side reel drive shaft, 2
6... Supply side reel drive shaft.

Claims (1)

[Claim for Utility Model Registration] In a tape recorder which obtains fast forward and rewind modes by moving an idler from an initial position to two different positions through fast forward and rewind operations, 1st and 2nd
a locking protrusion, a third locking protrusion protruding from the other end, and an idler rotatably attached to the other end, and the elongated hole is connected to the first fixing pin. a substantially Y-shaped actuating lever supported by a torsion spring, and a torsion spring held on both sides by second and third fixing pins, and the supporting point of the torsion spring can be moved in one direction by rapid forward operation. The third locking protrusion is pushed in by one side of the torsion spring to rotate the operating lever, transmitting the rotation of the idler to the reel drive shaft on the winding side, and by the rewinding operation. and the support point of the torsion spring is deflected in the other direction, and the second locking protrusion is pulled in by the other side of the torsion spring using the second fixing pin as a fulcrum, and the actuation lever is deflected; A tape recorder in which the rotation of the idler is transmitted to a rotating body that is constantly meshed with the supply side reel drive shaft.