JPS5839586Y2 - Switch device for audio equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a switch device for audio equipment, such as for ending a record play, which opens and closes a start switch in conjunction with the movement of a tone arm.

The start switch of such audio equipment may be opened and closed independently of the movement of the tone arm, but in recent years it has been strongly desired that the operation be as simple as possible if the sound quality is to be the same. In recent years, switch devices have been widely adopted in which a starter switch is opened and closed in conjunction with the movement of a tone arm.

However, all conventional switch devices have disadvantages in that they have complicated structures, are prone to failure, and are expensive to manufacture.

The purpose of this invention is to solve the above-mentioned drawbacks of the prior art and to provide a switch device with a relatively simple structure and low manufacturing cost.

This invention will be explained in detail below based on the embodiment shown in the drawings. In FIGS. 1 to 3, 1 is a starting switch and 2 is its switch lever.

This switch lever 2 has an actuating portion 2a. first passive part 2b,
The second passive part 2c is provided approximately radially, and a helical spring 4 is provided between the first passive part 2b and the fixed support shaft 3 protruding from the board.
By movably extending the switch lever 2,
When the rotational position of the switch lever 2 changes, the switch lever 2 is biased in the forward and reverse directions.

Reference numeral 5 denotes a first actuating plate attached to the tone arm shaft 7 of the tone arm 6, and a second actuating plate 8 is overlapped with the first actuating plate 5.

This second actuating plate 8 is loosely inserted into the tone arm shaft T, and the second operating plate 8 is loosely inserted into the tone arm shaft T.
A tension coil spring 9 is tensioned between the actuation plate 5 and the tension coil spring 9, and the direction in which the tension coil spring 9 is energized is brought into contact with a protrusion 5a installed on the first actuation plate 5.

Further, a slide lever 10 is pivotally attached to the end of the second actuating plate 8 extending toward the tone arm 6, and a pressure receiving protrusion 11 is further provided at an approximately intermediate position between this pivotally attached position and the tone arm shaft 7. It is erected.

The slide lever 10 extends toward the large gear side, which will be described later.
A tongue piece 10a is provided protruding near the tip thereof, and a stopper pin 10b is provided upright approximately at the center.

Reference numeral 12 denotes an actuation lever rotatably attached to the return plate 13, and this actuation lever 12 operates to open the starting switch 1 by acting on the second passive portion 2c of the switch lever 2. belongs to.

The return plate 13 has elongated holes 13 carved on both sides thereof.
The at13b is loosely inserted into the support shaft 15 of the large gear 14 and the support arm 16, and the pin 13c provided at the end is fitted into a substantially bar-shaped cam groove 14a carved in the large gear.
A tension coil spring 18 is stretched between a protruding piece 13d provided on the elongated hole 13b side and a fixed stopper 17 protruding from a substrate (not shown).

On the large gear 14, a well-known 7-traction lever 19 and an engagement lever 20 are overlaid and pivoted, and the protruding piece 19a of the friction lever 19 is connected to a sector-shaped hole 1 provided in the large gear 14.
4b to the lower surface of the thick gear 14, and the engagement lever 2
0 is provided with an engaging protrusion 20a.

21 is a small gear with a locking protrusion 21a fixed to the turntable shaft 23 of the turntable 22, 24 is a drive motor, and 25 is a boo! of this drive motor 24. This is a drive belt stretched between the turntable 24a and the turntable 7'' wheel 22.

Therefore, before the performance starts and the tone arm 6 is operated, the actuating part 2a of the switch lever 2 is away from the starting switch 1, as shown in FIG. It is kept stable by being energized, and the tip of the first passive part 2b is in slight contact with the tip of the first actuating plate 5. To start playing the record now, move the tone arm 6 to the armrest 26. When the switch lever 2 is moved toward the turntable 22 from above, in a so-called lead-in operation, both the second actuating plate 8 and the first actuating plate 5 rotate clockwise, and the switch lever 2 is moved so that its first passive part 2b is 1. By being pushed by one end of the actuating plate 5, the actuating plate 5 rotates counterclockwise (ie, in the positive direction in this specification) against the bias of the helical spring 4.

When the switch lever 2 rotates to a certain extent, the helical spring 4 moves together and the biasing direction changes, and this time the switch lever 2 is biased counterclockwise (positive direction), so the switch lever 2 automatically moves. The operating part 2a rotates.
Close the start switch 1 and maintain this state.

The closing operation for this start switch 1 is performed by the tone arm 6.
It is designed to be completed by the time the player moves to the top of turntable 22.

Furthermore, the tone arm 6 may be returned to its original position immediately before the start of playing a record or during the playing of a record.

In that case, the first actuating plate 5 and the second actuating plate 8, which rotate counterclockwise together with the tone arm 6, immediately return to their original positions, and then are pulled to the right by the second actuating plate 8. The stopper pin 10b provided on the slide lever 10 locks the locking protrusion 12a of the operating lever 12 and rotates it counterclockwise.
pushes the second passive part 2c of the switch lever 2 to rotate it clockwise against the bias of the helical spring 4, opening the starting switch 1.

Note that when the switch lever 2 rotates to a certain extent, the biasing direction of the helical spring 4 that moves together with it changes, so it automatically reverses and returns to its original position, and its first passive part 2b comes into contact with the first actuating plate 5. maintain the condition.

Next, after the first record performance was completed, the tone arm 6
When the lever moves rapidly toward the turntable shaft 23 as shown in FIG. , since this is rotated counterclockwise together with the engagement lever 20, the retaining protrusion 20a moves toward the rotating small gear 21 and comes into contact with the retaining protrusion 21a,
This will push it.

Then, the small gear 21 that was not engaged with the notch 14e of the large gear 14 engages with the large gear 14 and rotates it counterclockwise, so that the return plate 13 is activated by the tension coil spring by the action of the cam groove 14a. The tip of the tone arm 6 is moved to the right against the pulling force of the tone arm 18, and the tip of the tone arm 6 is slightly raised by operating an arm lifter (not shown) at the bent portion 13e provided on the negative side.
Press the pressure receiving protrusion 11 provided on the second actuating plate 8 to return the tone arm 6 to the position above the armrest 26.

At this time, the first actuating plate 5 also returns to its original position.
The actuating lever 12 is rotated counterclockwise when the protruding portion 12b comes into contact with the fixed stopper 17, and becomes approximately parallel to the return plate 13.

As the large gear 14 continues to rotate, the return plate 13 is guided by the cam groove 14a and moves to the left to return to its original position.
c to press the second passive part 2c of the switch lever 2 and rotate it clockwise (in this specification, in the opposite direction) to open the starting switch 1.

The operating lever 12 that presses the second second passive part 2c of the switch lever tries to rotate clockwise, but the stopper pin 10b provided on the slide lever 10 abuts one side of the lever, preventing the rotation. This prevents the operating lever 12, which rotates the switch lever 2 against the elasticity of the helical spring 40, from escaping, and prevents the helical spring 40 from escaping.
is for stably maintaining the posture of the switch lever 2 rotated clockwise.

The tone arm 6 is lowered and placed on the arm rest 26 when an arm lifter (not shown) is released from the influence of the bent portion 13a of the return plate 13.

4 to 6 show another embodiment, and according to the drawings, an interlocking lever 34 is provided between the passive portion 32b of the switch lever 32 and the first actuating plate 33.

Therefore, the switch lever 32 is configured to open and close the starting switch 31 by a rotational action opposite to that of the switch lever 2 mentioned above. The means for rotating the switch lever 36 are a fixed spring stopper 37 and a fixed stopper 38, both of which are provided on a board (not shown). Therefore, before the record starts playing, the actuating section of the switch lever 32 is rotated as shown in FIG. 32a is the starting switch 31
The end of the interlocking lever 34 is in contact with the first actuating plate 3.
When the tone arm 39 is moved in the direction of the turntable 40 in a so-called lead-in operation to start playing, the first actuating plate moves as shown in FIG. 33
rotates together with the second actuating plate 41 and pushes the interlocking lever 34, so that the interlocking lever 34 rotates counterclockwise and rotates the switch lever 32 clockwise (ie, forward).

Then, the actuating portion 32a moves away from the starting switch 31, thereby closing it.

Next, when the first record playing is completed, the return plate 35 is
moves to the right.

Then, the head 36a of the operating lever 36 switches to F-L.
/bar 3217) contacts the driven part 32b, but rotates counterclockwise and escapes while moving to the right, and just before the limit of movement, the tail part 36b contacts the fixed stopper 38, causing the head part 36a to move clockwise. Rotate it and raise it again.

Then, when the return plate 35 moves to the left, the head 36a moves to the passive part 32b of the switch lever 32.
However, at the same time, the tail portion 36b abuts the fixed spring stopper 37, causing the operating lever 36 to push the passive portion 32b of the switch lever 32 with its head 36a. , rotate it counterclockwise (ie, in the opposite direction).

Then, the switch lever 32 is automatically reversed by the helical spring 43, and the actuating portion 32a contacts the starting switch 31, thereby opening the starting switch 31.

At that time, the head 36a of the actuating lever 36 is separated from the driven part 32b of the switch lever 32, so the driven part 32b
Even if the lever 340 rotates clockwise again due to the action of the interlocking lever 340, this will not be prevented.

Further, in this embodiment, even if the tone arm 39 is returned to the armrest 42 halfway, the start switch 31 cannot be opened.

In that case, the reject lever 44 is rotated in the direction of arrow A by a means not shown, the friction lever 47 is rotated, and the slide lever is released when the record playing is finished, as explained in the previous embodiment. 46 is moved leftward by the tone arm 39 and its tongue piece 46a
This has the same effect as rotating the 7-reaction lever 47, prompting the return plate 35 to operate, and opening the start switch 31.

As explained in detail above, this invention has the advantage that it is possible to reliably open and close the starting switch by moving the tone arm, and that the structure is simple, so there are fewer failures and it can be manufactured at low cost.

[Brief explanation of the drawing]

FIG. 1 is a plan view before the tone arm starts moving, FIG. 2 is a plan view with the tone arm moved, and FIG. 3 is a plan view with the tone arm returned to its original position. 4 to 6 show other embodiments, of which the fourth
5 is a plan view of the tone arm before it starts moving, FIG. 5 is a plan view of the tone arm in a moved state, and FIG. 6 is a plan view of the tone arm returned to its original position. 1.31... Start switch, 2,32...
...Switch lever, 4,43... String spring,
5, 33...first actuating plate, 6,39...
・Tone arm, 8°41...Second operating plate, 1
0,46...Slide lever 12,36...
...-Operating lever 10b...-Stopper pin, 17,3B...Stopper pin, 13.3
5...Return plate, 37...Fixed spring stopper 22,40...Turntable〇

Claims (1)

[Scope of utility model registration request] A starting switch, a switch lever rotatably provided near the starting switch, a string spring energized in the forward and reverse directions depending on the rotational position of the switch lever, and a first actuator that rotates together with the tone arm. It consists of a return plate that moves back and forth to return the tone arm to its original position when the record is finished playing, and an operating lever that is pivotally attached to the return plate. By controlling a slide lever that is moved to the left and right in the longitudinal direction via the second operating plate, the switch lever is rotated in the forward direction via the first operating plate in conjunction with the lead-in operation of the tone arm, and the return plate is rotated in the forward direction. When the tone arm is returned to its original position at the end of one reciprocating operation or during a performance, the switch lever is rotated in the opposite direction via the operating lever, thereby opening and closing the starting switch. A switch device for audio equipment, characterized by: