JPS5822289Y2 - Switch device for audio equipment - Google Patents

Description

[Detailed description of the invention] This invention is used in audio equipment such as stereos and players that have a tone arm gear type auto return mechanism.
The present invention relates to a switch device for a drive motor.

Conventionally, a slide lever moves in the longitudinal direction in conjunction with the tone arm as it rotates, and the movement of this slide lever moves in the longitudinal direction in conjunction with the drive gear that motivates the rotation. In audio equipment that has a gear type auto-return mechanism, which is equipped with a return lever that returns the tone arm to its original position after raising the tone arm on the groove, the drive motor is started in accordance with the movement of the slide lever and the return lever. Various switches have been proposed to open and close the switch.

However, in all conventional switch devices of this type, the starting switch is fixed so that it does not move, and its contacts are opened and closed by a contact lever that operates in response to the movement of the slide lever or return lever described above. Therefore, the opening/closing operation tends to become unstable, and if the opening/closing operation is not stabilized, the device becomes complicated.

The purpose of this invention is to solve the above-mentioned drawbacks of the prior art and provide a switch device that has a simple structure and can stably open and close the switch in conjunction with the gear type auto-return mechanism of audio equipment. There is something to do.

An embodiment of this invention will be explained in detail below based on the drawings.The gear type auto return mechanism of the tone arm is
A slide lever 1 that moves in the left and right longitudinal direction together with the tone arm 2 via an actuating plate 3 fixed to the arm shaft of the tone arm 2, and a tongue piece 1 provided on the slide lever 1.
Two friction levers 5 rotated by a
. The main drive gear 11 is fixed to the turntable shaft 10 which is provided with a locking protrusion on the upper part of the outer periphery, which normally rotates idly within the notch 4b of the drive gear 4.
and a return lever 12 which is supported by a shaft so as to be movable in the left and right longitudinal directions while being pulled leftward by a spring 13, and whose left end part is fitted into the cam groove 4a of the drive gear 4. There is.

The switch device includes a switch opening/closing means 1b consisting of a protrusion integrally protruding from the abdomen of the slide lever 1 described above.
The protrusion 12b protruding from the intermediate lower surface of the return lever 12 described above and the spring 17 force the neck in the direction away from the switch opening/closing means 1b between the movement locus of the switch opening/closing means 1b and the protrusion 12b. It consists of a start switch 15 housed in a switch box 16 that is pivotally supported so that it can swing, and before the start of record play, a protrusion 12b provided on the return lever 12 closes the switch box 16 as shown in FIG. The beak-shaped end 16a is pushed clockwise against the bias of the spring 17 to control its posture, and the switch opening/closing means 1b provided on the slide lever 1 pushes the contact 15a of the starting switch 15 to turn it off. I'm letting you do it.

In addition, 20 is a stopper, and this stopper 20 is made of a light and weak material when the slide lever 1 is made of a light and weak material.
This is to prevent it from bending and escaping.

Now, to start playing a record, lift the tone arm 2 from above the armrest 19 and turn its tip toward the turntable 9.
Since the slide levers 1, which are interlocked together via the
away from the contact 15a and turn it on.

This ON operation will slightly change the tone arm 2 to the turntable 9.
Just turn it to the side and it will start working immediately.

Then, the rotating drive motor 7 starts rotating the turntable 9 via the belt 8, and the turntable 9 is ready to play.
When the switch is returned to the armrest 19, the switch opening/closing means 1b of the slide lever 1, which returns to its original position, returns to the contact point 1.
5a, the start switch 15 is OFF'F at any time.
Then, the drive motor 7 stops.

Next, when the record playing is finished and the tone arm 2 makes a large turn along the rough silent groove of the record, the slide lever 1 increases the amount of movement per unit time, and the second
As shown in the figure, the friction lever 5 is
, this friction lever 5 and another friction lever 6 that is overlapping and pivotally supported rotate, and the locking protrusion 6a engages with the locking protrusion 11a of the main drive gear 11.
The drive gear 4 is rotated slightly by contact with and being pushed.

Then, the main drive gear 11 comes out of the notch 4b and meshes with the drive gear 4, so the drive gear 4 rotates, and at the same time, the return lever 12, whose one end is fitted into the cam groove 4a, is guided by the cam groove 4a. Start moving to the right.

Then, the start switch 15 rotates counterclockwise in the groove that contacts the stopper 18 due to the bias of the spring 17 in the switch box 16 and escapes, and the return lever 12
After raising the elevation device (not shown) of the tone arm 2 using a step-like contact provided at the right end thereof, the actuating plate 3 is pushed to the right with the locking protrusion 12a to raise the tone arm 2.
return to its original position.

Note that this return operation of the tone arm 2 is performed by operating the reject lever 14 even during the performance.

The tone arm 2 is connected to the armrest 1 as shown in FIG.
When returning to the top of 9 at step 1, the switch opening/closing means 1b of the slide lever 1, which has both moved to the right and returned to its original position, comes to the position where the contact 15a of the starting switch 15 is turned OFF. Since the switch 15 is rotated and is separated from the switch opening/closing means 1b, it never turns off.

At this point, the start switch 15 is connected to the spring 17.
Even if the switch opening/closing means 1b is not energized in the direction away from the switch opening/closing means 1b, the start switch 15 is lightly flipped by the switch opening/closing means 1b provided on the slide lever 1 that returns with the tone arm 2, so the same effect can be achieved. However, the advantage of the embodiment is that even if the start switch 15 does not swing smoothly due to some reason such as dust, malfunction of the start switch 15 can be completely prevented.

Next, when the return lever 12 is guided by the cam groove 4a of the drive gear 4, which continues to rotate independently, and returns to the original position as shown in FIG. 16a to turn the start switch 15 clockwise, the contact 15a is connected to the switch opening/closing means 1.
b from a direction perpendicular to the direction of movement of the slide lever to completely turn off the start switch 15.

At this time as well, the stopper 20 serves to prevent the slide lever 1 from bending and escaping as much as possible when the slide lever 1 is made of a light and weak material.

Of course, at this point, if the slide lever 11 is strong enough, the stopper 20 may not be necessary.

Then, the main gear 11 just falls into the notch 4b of the drive gear 4, and when it reaches this point, it pushes the end of the friction lever 5 with its outer periphery, causing it to escape inward together with the other friction lever 6. , tone arm 2 again
Even if you turn on the start switch 15 by moving the , the auto return mechanism will not operate.

Note that the switch opening/closing means 1b provided on the slide lever 1 is shown as a raised part integrally protruded from the switch lever 1 in the embodiment, but this means that only the raised part is provided independently. The same effect can be achieved even if the slide lever 1 is pivoted so as to swing freely, and the projection 12b provided on the return lever 12 may be provided on the top surface of the return lever 12 depending on the mounting position of the start switch 15. .

Further, when the stopper 20 is an eccentric pin as shown in FIG. 4, there is an advantage that the distance between the switch opening/closing means 1b and the contact 15a of the starting switch 15 can be freely and finely adjusted.

As explained in detail above, this invention changes the concept of a switch device that previously works in conjunction with this type of gear type auto return mechanism, and replaces the starting switch, which was fixed with 1, with the slide lever of the gear type auto return mechanism. The switch opening/closing means provided on the return lever is swingable between the locus of movement of the protrusion, and the protrusion controls the attitude of the starter switch, and the switch opening/closing means turns the switch ON and OFF. As a result, with an extremely simple structure, it is possible to reliably turn on the start switch of the drive motor with the lead-in operation of the tone arm, and turn it off by the return operation of the tone arm, whether manual or automatic. Effects such as preventing the tone arm from becoming unstable when the tone arm returns to its original position can be achieved.

[Brief explanation of drawings]

The drawings show one embodiment of this invention, and for ease of understanding, the substrate is completely omitted from FIGS. 1 to 3. Figure 1 is a plan view with the tone arm in place, Figure 2 is a plan view with the tone arm moved, and Figure 3 is a plane view with the return lever moved to top dead center. FIG. 4 is a side sectional view of the slide lever movement adjustment device.

Claims (1)

[Scope of utility model registration request] Equipped with a gear type auto-return mechanism having a slide lever that moves longitudinally left and right in conjunction with the tone arm, and a return lever that moves longitudinally left and right in conjunction with a drive gear to return the tone arm to its original position. In accordance with the present invention, a switch opening/closing means is provided on the abdomen of the slide lever, a protrusion is protruded from the same abdomen of the return lever, and the head can be freely oscillated between the movement locus of the protrusion and the switch opening/closing means. The start switch of the drive motor is pivoted by rotationally energizing it in one direction, and the swing of the start switch is controlled by the protrusion of the return lever, and the switch opening/closing means provided on the slide lever is used to start the drive motor. By opening and closing the switch, the starting switch can be turned off when the slide lever and the return lever occupy a predetermined fixed position relationship, and either one of the slide repart return levers is in the fixed position. A switch device for an audio device, characterized in that the start switch can be turned on when the device is not in use.