JPS5839587Y2 - 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 of the Various switching devices for opening and closing have been proposed.

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. Because of this structure, the operation tends to become unstable, and if this opening/closing operation is not stabilized, the device becomes complicated. It is an object of the present invention to provide a switch device having a simple structure and capable of stably opening and closing the switch in conjunction with a gear type auto-return mechanism of an audio device.

One embodiment of this invention will be described in detail below based on the drawings. In FIGS. 1 to 4, the gear type auto return mechanism of the tone arm is fixed to the arm shaft 2a of the tone arm 2 together with the tone arm 2. A slide lever 1 that moves in the left and right longitudinal direction via an actuating plate 3, and two 7-action levers 5 and 6 that are rotated by a tongue piece 1a provided on this slide lever 1 are superimposed on the upper surface and are pivotably supported. A bar-shaped cam groove 4a is carved in the lower surface, and a notch 4b is carved in the outer periphery of the drive gear 4, which is rotatably supported. A main drive gear 11 is fixed to a turntable shaft 10 having a locking protrusion 11a on the upper edge of the outer periphery, which is idling at the top of the turntable. At the same time, the return lever 12 has a protrusion 12c on the left end fitted into the cam groove 4a of the first drive gear 4.
It is composed of.

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. The starting switch 15 is housed in a switch box 16 that is rotatably supported, and the switch opening/closing means 1b is connected to the starting switch 1.
It consists of an eccentric stopper 20 fixed with an adhesive or the like to the substrate 21 on the opposite side of the position where it contacts the contact point 15a of No. 5,
By turning this stopper 20 in either the left or right direction during assembly, the distance between the switch opening/closing means 1b and the contact 15a can be adjusted.

Before the record starts playing, the protrusion 12b provided on the return lever 12 pushes the beak-shaped end 16a of the switch box 16 clockwise against the bias of the spring 17, as shown in FIG. The posture is controlled, 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, and only the stopper 20 is in a fixed position.
The switch opening/closing means 1b of the slide lever 1 is the contact 15
Contact the opposite side that contacts a and L.

Note that 14 is a reject lever, and 15b is a locking protrusion for locking the spring 18.

FIG. 5 shows another embodiment of the stopper, and according to the drawing, the stopper 22 has a protrusion 23a protruding from the base plate 23.
The switch opening/closing means 1b can be moved in the direction of the contact 15a of the starting switch 15 by turning the frame in either direction.

FIG. 6 shows another embodiment, and according to the drawing, the stopper 25 is fastened to a long groove 26a provided in the base plate 26 with a screw 2T, and by loosening the screw 2T, the switch opening/closing means 1b is activated. 15 in the direction of the contact 15a.

Now, in order to start playing a record, when the tone arm 2 is lifted from the armrest 19 and its tip is swiveled toward the turntable 9, the slide lever 1, which is interlocked with the tone arm 2 through the actuating plate 3, Since it moves to the left, the switch opening/closing means 1b is connected to the starting switch 1.
5, 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.
Since the return lever 12 remains stopped, the switch opening/closing means 1b of the slide lever 1, which returns to its original position, returns to the contact point 15a.
and the stoppers 20, 22, 25 and press them, the start switch 15 is turned off at any time, and the drive motor 7 is stopped.

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.
As shown in FIG. 2, since the tongue 1a pushes the 7-traction lever 5, this friction lever 5 and the other 7-action lever 6, which is superimposed on and supported by the friction lever 5, rotate. The locking protrusion 6a is the locking protrusion 1 of the main drive gear 11.
1a and is pushed, causing the drive gear 4 to rotate slightly.

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 protrusion 12c at one end is fitted into the cam groove 4a, moves rightward. Start.

Then, the start switch 15 turns counterclockwise and escapes by the bias of the spring 17 in the switch box 16 until it comes into contact with the shift bar 18, and the return lever 12
After raising the elevation device (not shown) of the tone arm 2 using the step-shaped bent portion 12d provided at the right end thereof, the actuating plate 3 is pushed to the right using the locking protrusion 12a to raise the tone arm 2. Return to original position.

The tone arm 2 is connected to the armrest 1 as shown in FIG.
9, the switch opening/closing means 1b of the slide lever moves rightward and returns to the starting switch 1.
However, at this time, as mentioned above, the starting switch 15 is rotated and is away from the switch opening/closing means 1b, so it will not be turned off at all.

At this point, even if the starting switch 15 is not biased by the spring in the direction away from the switch opening/closing means 1b, the starting switch will be lightly pushed by the switch opening/closing means 1b provided on the slide lever 1 that returns with the tone arm. Although the same effect can be achieved, it is possible to prevent malfunction of the start switch even if the start switch does not swing smoothly due to some reason such as dust. There are advantages.

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 is pushed against the bias of the spring 17 to rotate the start switch 15 clockwise and push it toward the switch opening/closing means 1b, so that the contact 15a comes into contact with the switch opening/closing means 1b, and the starting switch 15 is turned clockwise. Turn 15 off completely.

The stoppers 20, 22, and 25 remain in the fixed position at this time as well, and serve to prevent the slide lever 1 from flexing and escaping, thereby stabilizing the switch opening/closing operation.

At this time, the contact 15a of the starting switch 15 is
The switch opening/closing means 1b provided on the slide lever 1 is pushed toward the stopper 20 side, and since it does not operate to pull it to the left, the tone arm, which once returned to the top of the armless (armless) 19, is moved back toward the record due to the impact at this time. There is no need to worry about being forced to turn and falling off the armrest.

Therefore, as can be easily understood from the above explanation,
A switch opening/closing means 1b configured to be movable with respect to the stopper 20°22.25 which always occupies a fixed position;
The starting switch 15 is turned off only when the starting switch 15 and the projection 12b of the return lever occupy a predetermined positional relationship.

When the return lever 12 returns to its original position, the main gear 1
1 just falls into the notch 4b of the drive gear 4, and by the time it reaches this point, it pushes the end of the 7 traction lever 5 with its outer periphery, causing it to escape inward along with the other 7 traction lever 6. Even if the tone arm 2 is moved again and the start switch 15 is turned ON, the auto-return mechanism will not operate. Although the raised portion is shown as being more integrated, the same effect can be achieved by providing only this raised portion independently and pivoting the slide lever so that it can swing freely.

Further, the protrusion 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. The starting switch is pivotably supported between the switch opening/closing means provided on the lever and the return lever and the locus of movement of the protrusion, so that it can swing freely, and a stopper is provided protrudingly on one side of the switch opening/closing means. By configuring the contact point of the starting switch to be turned off only when the switch opening/closing means, the protrusion, and the starting switch occupy a predetermined positional relationship with respect to the stopper, a simple structure is achieved. Even if the slide lever is made of a light material so as not to obstruct the movement of the tone arm over the record, it is possible to perform an extremely stable switch opening/closing operation without malfunction, and once it is returned to the tone arm. This also provides the effect that the tone arm does not become unstable when the starting switch is turned off.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention, and the substrates are omitted from FIGS. 1 to 3 for ease of understanding. Fig. 1 is a plan view with the tone arm in its normal position, Fig. 2 is a plan view with the tone arm moved, and Fig. 3 is a plan view with the return lever moved to top dead center. FIG. 4 is a side sectional view of the stopper mounting position, FIG. 5 is a side sectional view showing another embodiment of the stopper, and FIG. 6 is a side sectional view showing another embodiment of the stopper. . 1...Slide lever, 1a...tongue, 1b...switch opening/closing means, 2...
Tone arm, 4... Drive gear, 11...
...Main gear, 12...Return lever 12
b...Protrusion, 15...Start switch,
15a...Contact, 16...Switch box, 16a...Beak-shaped end, 17...
・Spring, 20°22, 25...stopper, 21, 23, 26...substrate.

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 the audio equipment, a switch opening/closing means provided on the abdomen of the slide lever, a protrusion also protruding from the abdomen of the return lever, and a rotation in one direction between the protrusion and the movement locus of the switch opening/closing means. It consists of a starting switch that is pivoted so that it can swing freely when the switch is opened and closed, and a stopper that is provided on the opposite side of the switch opening/closing means from the starting switch side. When the position is in the specified position, the protrusion provided on the return lever controls the swing of the starting switch, and the switch opening/closing means provided on the slide lever fits between the contacts of the starting switch and the stopper to open the starting switch. is turned off, but is turned on when the positional relationship between the slide lever and the return lever is disrupted, and the stopper is configured to be able to adjust the suppressing position with respect to the switch opening/closing means. A switch device for audio equipment, characterized by: