JPS6232359Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mechanism in which a cassette tape recorder is provided with separate operating sections for fast forwarding and rewinding, and which is brought into a stopped state or a cassette ejection state by pressing both simultaneously.

For the above-mentioned mechanism, it is necessary to satisfy the following conditions.

1 Both levers for fast forwarding and rewinding can of course be pressed independently, and pressing either of these levers will cause the head and pinch roller to retreat, and from the high-speed rotating drive pulley to the reel stand for rotation transmission. To enable resilient pressure contact of an idler.

2. The actuation member connected to the stop or eject mechanism can be actuated by pressing both of the levers at the same time.

3. When pressing both of the above levers individually, there should be no harmful force exerted on other parts, including interaction between the two levers. This acting force also arises from the reaction of the spring for pressing the idler against the reel stand,
In order to reduce the influence, the biasing spring of each lever must be made stronger, which produces a result that does not meet the conditions described in the next section.

4. Fast-forward, rewind, and stop/eject operations can be performed easily and without requiring much force.

No mechanism has hitherto appeared that satisfies these conditions. The present invention provides a mechanism that can meet these requirements.

On the upper surface of a frame 1 which is additionally fixed to a tape recorder board (not shown), an ejector lever 3 is slidable in the directions of arrows A and B, using pins 2 and 2 on the same surface as guides. It has functions related to moving the head and pinch rollers forward and backward, and raising and lowering the cassette holder, but since this is a well-known technique, it will not be described in this specification.

There are T-shaped holes 4 on the surface of the frame 1 on the right side of the drawing.
A circular arc hole 5 and guide pins 6, 6 are provided.
On the lower surface of the frame 1 in this part, a rotating piece 8 rotatably supported by a shaft 7 has a fixed pin 9 at one end protruding from the circular arc hole 5 to the upper surface of the frame 1, and the other end. The fixing pin 10 is provided so as to protrude downward. This pin 10 is the sixth
As shown in the diagram, it is connected to the fast-forwarding and rewinding drive mechanism, and has a pair of reel stands 11 and 1.
The idler 13 rotating at high speed is connected to the idler 13 via a spring 14 and a link mechanism 15 in order to selectively bring it into elastic contact with the idler 13 rotating at high speed.

The actuating piece 16 has pins 17 and 18 fixed to it that protrude both upward and downward at one end, and a long hole 19 is provided near the other end along the center line, and both sides of this area are slightly swollen and have sloped sides. 20 and 21 are formed symmetrically. The actuating piece 16 is placed on the frame 1, with the pin 18 protruding downward into the T-shaped hole 4, and the elongated hole 19 protruding from the circular arc hole 5 of the frame 1 (the rotating piece 8
) are arranged so as to fit into the respective pins 9.

The fast-forwarding lever 23 and the rewinding lever 24 are superimposed further above the actuating piece 16, and are guided by the guide pins 2, 6, and 6 on the frame in the direction of arrows A and B.
It is possible to slide in the direction. Both levers are formed symmetrically to each other during polymerization. Slanted sides 25a, 26
A locking part 25 with a slight step difference between a and the innermost part
b, 26b, cove-shaped guides 25, 26
and a pin 2 protruding downward toward the center.
7 and 28 are fixed respectively, and furthermore, there are engagement holes 32 and 33 of the same shape and overlapped in the same position when both levers are overlapped on the left side of the drawing.
are elongated holes 32a and 33a into which the upwardly protruding pin 34 near the center of the ejector lever 3 is inserted, straight portions 32b and 33b branching from these portions into two on the right side of the drawing, and a bent portion 32c; 33c
It consists of

Both levers 23 and 24 are attached to the guide 2 during assembly.
5 and 26 are pins 1 protruding upward from the actuating piece 16.
7 is also arranged so that the inclined sides 20, 21 of the actuating piece 16 can abut against the pins 27, 28 of both levers. Additionally, both levers have functions such as retracting the head and pinch roller during fast forwarding and rewinding, locking the lever itself when pressed, and preventing both levers from being pressed at the same time, but these are well-known technologies, so these will not be described here. omitted. Springs 29, 30, and 31 are springs that bias the fast forward lever 23, rewind lever 24, and eject lever 3 in the direction of arrow B, respectively.

The pin 34 of the eject lever 3 protrudes further upward than the rewinding lever 24 after assembly, and a substantially hook-shaped control piece 35 is pivotally supported here, and a spring 37 is connected to one end of the hook shape between the pin 34 and the eject lever 3. A pin 36 is fixedly attached to the other end of the key shape so as to face downward, and both the levers 23, 24 are
The engaging holes 32 and 33 are inserted near the fork portions 32b and 33b of the frame 1, and then inserted into the L-shaped hole 3 of the frame 1.
Let's face the 8th.

The tape is currently in recording/playback mode, so fast forward,
When neither of the rewinding levers 23 and 24 is pressed, each lever including the eject lever 3 is biased in the direction of arrow B by the spring as described above, so the actuating piece 16 pushes the pin 17 in both directions. Due to the symmetrical guides 25, 26 of the levers 23, 24, they are brought in the direction B on the center line XX, so that the lower pin 18 is at the intersection 4a of the T-hole 4 of the frame 1, and , the pin 9 that engages with the elongated hole 19 of the operating piece 16 is connected to the rotating piece 8, the pin 10, and the link mechanism 1.
5. The idler 13 is biased by the neutral position holding mechanism 40 via the spring 14 so that it does not come into contact with either of the reel stands 11 and 12. 16 is eventually biased in the direction of arrow B with its own centerline coincident on the centerline. The pin 36 of the control piece 35, which is biased to rotate clockwise, engages the locking portion 32 of the overlapping engagement holes 32 and 33 of both levers.
d and 33d to restrict rotation.
In this state, the tip of the pin 36 is located at the bent portion 38a of the L-shaped hole 38 of the frame 1.

When the operating portion 23a of the fast-forwarding lever 23 is pressed in the direction of arrow A in order to perform fast forwarding in this state, the pin 17 above the actuating piece 16 first collides with the inclined side 25a of the guide 25 of the lever 23 and is pressed. On the other hand, since the rewinding lever 24 is urged in the direction of arrow B by the spring 30, the locking portion 26b of the guide 26 restricts the movement of the pin 17 in the direction of arrow A, and the pin 17 is eventually pushed downward in the drawing. As the actuating piece 16 moves slightly clockwise, the operating piece 16 rotates slightly in the clockwise direction, and as shown in FIG.
enters the end 4b of the T-shaped hole 4 and becomes engaged, and by further pressing the lever 23, the pin 27 abuts and presses against the inclined side 20 of the actuating piece 16, and the pin 18 The pin 9 is now rotated counterclockwise around , and is engaged with the elongated hole 19.
By rotating the rotating piece 8 in the counterclockwise direction (as viewed from the top of the drawing) and displacing the pin 10 in the direction of arrow C, the spring 14 moves the idler 13 to the reel stand 11 via the link mechanism 15. Let it come into contact with each other,
Fast forward. At this time, it goes without saying that the head and pinch roller are slightly retracted by a mechanism (not shown). In order to perform the above-mentioned operation without error, the upper pin 17 of the pin 18 that has entered the end 4b of the T-shaped hole 4 is connected to the parallel side 25d that is connected to the inclined side 25a of the fast forward lever 23 that has been pressed and moved.
The control piece 35 is locked and does not come off.
The pin 36 is locked to one side 33d of the engagement hole 33 of the lever that is not pressed, that is, the rewind lever 24, and its rotation is still restricted.

The pressed fast-forward lever 23 is locked by a mechanism (not shown) and the fast-forward operation is performed stably, but as mentioned above, the idler 13 is
A spring 14 is used to elastically press the actuating member 16, and a reaction force therefor is exerted on the actuating piece 16.
However, in the mechanism of the present invention, this reaction force is applied to the pin 27 of the fast-forwarding lever 23 that is in contact with the edge 20a of the bulging portion of the actuating piece 16, and to the frame 1 to which the pin 18 of the actuating piece 16 is locked. Since the end portion 4b of the T-shaped hole 4 is used as the force-receiving portion, there is no influence on other members at all.

The locked fast forward lever 23 is unlocked by pressing the operating portion 24a of the rewind lever 24. Like the locking mechanism, this is a known technique and will not be described here. When the actuating piece 16 returns to its original position, the pressure on the bulging portion 20a of the actuating piece 16 is released, and the pin 17
is guided by the inclined side 25c of the guide 25, so that it returns to its original state before being pressed and is positioned on the center line again.

Next, when performing rewinding, the operation section 24a is pressed, but the following operation is symmetrical or partially the same as the above-mentioned fast forwarding, so a description thereof will be omitted.

Stopping or ejecting the tape is performed by simultaneously pressing the operating portions 23a and 24a of both levers. That is, the inclined sides 25a and 2 of both levers
6a simultaneously presses the pin 17 of the actuating piece 16, so that the actuating piece 16 moves along the center line in the direction of arrow A. At this time, the pin 18 advances in the straight part 4d of the T-shaped hole 4, and the elongated hole 19 is displaced along the center line, so the pin 9 of the rotating plate 8 remains in its original state, and the fast forwarding and rewinding mechanisms operate. There's nothing to do. By pressing both levers 23 and 24, pin 3 of control piece 35
6 comes off from the sides 32d, 33d of the engagement holes 32, 33, enters the bent parts 32c, 33c, and the end edges 3
2e and 33e, the ejector lever 3 is pressed via the pin 36, and a mechanism (not shown) causes the head and pinch roller to stop, including retraction, or eject the cassette. Since the angles between the edges 32e, 33e of the bent portions 32c, 33c and the straight portions 32b, 33b are formed at a rather acute angle, if the pin 36 enters even slightly, it will be difficult to separate. lever 23,2
Even if the simultaneous pressing of the levers 4 and 4 is lost, the ejector lever 3 will be reliably pressed. or,
As mentioned above, the pin 3 of the control piece 35 is attached to the frame 1.
There is an L-shaped hole 38 into which the tip of the pin 36 engages, and when both levers are pressed simultaneously, the pin 36 moves from the bent portion 38a to the straight portion 38b, and then advances through this hole 38b. Therefore, in addition to the effects of the shapes of the engaging holes 32 and 33 described above, the pin 36 that has once entered the straight portion 38b is held and the eject lever 3
This is to ensure the reliability of the operation.

Execute lever 3 is set to both levers 2 after the operation is completed.
3 and 24, the force of the spring 31 causes the control piece 35 to return in the direction of the arrow B, and the control piece 35 also returns to the inclined side 32f of both levers, where the pin 36 returns.
It is pressed by 33f and rotates to return to its original position.

In the above-described embodiment, the displacement of the actuating piece 16 caused by pressing the fast-forwarding lever 23 or the rewinding lever 24 is transmitted to the link mechanism 15 via the rotating piece 8 to perform fast-forwarding and rewinding. A structure may be used in which the rotational displacement of the actuating piece 16-1 is directly transmitted to the link mechanism 15-1 as shown in FIG. In this case, the link mechanism can be directly driven by making the bulging portions 20-1, 21-1 of the actuating piece 16-1 slightly larger and setting a large amount of rotation.

As described above, according to the present invention, there is provided a tape recorder which is provided with pressing levers for fast forwarding and rewinding, and in which tape running is stopped by pressing both levers at the same time. Since the actuating piece is configured so that the reaction force of the idler spring that comes into elastic contact with the spring during return is applied only to the locking portion of the fixed base plate and the lever on the pressed side, there is no influence on other members. Therefore, there is no need to increase the spring pressure of the levers in order to counteract the influence, and the operating force for each lever is extremely light. It has great practical value when used in car stereos, etc.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is an exploded plan view of the main parts, Fig. 2 a is a top view of the recording/reproduction state, Fig. 2 b is a bottom view, and Fig. 2 c is a partially removed part. A top view of the same state, d is an enlarged view of the main part, Fig. 3 a is a top view of the fast forward operation process, Fig. 3 b is an enlarged view of the main part, Fig. 4 a is a top view when the fast forward operation is completed, and Fig. 4 b is the same. Figure 5 is a top view during stop/eject operation, Figure 6 is an explanatory diagram of the drive mechanism, Figure 7 is a perspective view of some parts, and Figure 8 is a bottom view. It is an explanatory diagram of another embodiment, and in the drawing, 1... Fixed board (frame), 3... Eject lever, 4b, 4c... Locking part of fixed board, 8
...Rotating piece, 13...Idler, 14...Spring,
15... Link mechanism, 16... Actuation piece, 17,1
8... pin, 23... fast forward lever, 24... rewind lever.

Claims (1)

[Scope of utility model registration request] In a tape recorder that is equipped with pressing levers for fast forwarding and rewinding, and in which tape running is stopped by pressing both levers simultaneously, one end is fixed to a fixed substrate when each pressing lever is pressed individually. An actuating piece that locks in the locking part of the lever and rotates the other end, and moves linearly when both levers are pressed at the same time, and an elastic drive between the rotating end of the actuating piece and an idler for fast forwarding and rewinding. It consists of a link mechanism connected to the mechanism and an ejector lever that moves with the linear movement of the actuating piece to stop the equipment, and the actuating piece presses the reaction force due to the elastic contact of the idler. A fast forward/rewind mechanism for a tape recorder, characterized in that transmission is transmitted only to a lever and a locking part of a fixed board.