JPS5820165B2 - push button tuner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a push-button tuner, and more particularly to a push-button tuner in which the insertion position of a core in a tuning coil is changed by a memory plate that slides as each push button is suppressed. This is related.

One type of push-button tuner is a thin push-button tuner in which the wall thickness of the push-button tuning portion is less than ICIfL.

This thin push-button tuner is attached to the core slide by moving the memory plate a predetermined amount in the width direction of the push-button tuner using the push button for channel selection, and moving the core slide connected to this memory plate back and forth. Tuning is performed by inserting and removing a tuning core into the coil.

In addition to the above-mentioned tuning using the push button, this push button tuner is provided with a tuning knob for manual tuning, and by rotating this tuning knob, the core slide is moved back and forth to tune the tune tuned by the push button. It allows you to select other channels and make fine adjustments when tuning.

When operating a push button, the tuning knob and core slide must remain connected (and the memory plate means that even the tuning knob must be rotated, which increases the load (and makes it difficult to press the button smoothly). There is an inconvenience that the operation becomes impossible.

Therefore, a clutch mechanism is provided between the tuning knob and the core slide, and the clutch is disengaged when the button is pressed to lighten the load.

In this way, a push-button tuner includes a push-button tuner equipped with an arm for each push button and a memory plate, a tuning section consisting of a tuning coil, a core slide, etc., a tuning knob for manual tuning, and a clutch mechanism attached to it. Offering.

Among these, it is impossible to reduce the size of the tuning section beyond a certain size depending on the size of each tuning coil, the size of the core inserted into it, or the insertion stroke of the core, so these push button tuners are made smaller. In order to reduce the size and thickness of the device, it is necessary to downsize other parts, such as the push button operation section, the tuning knob, and its clutch mechanism.

Moreover, in miniaturizing each of these mechanisms, the operating force from the memory plate and tuning knob is reliably transmitted to the core, and the core moves smoothly within the tuning coil, and the stopping position within the tuning coil is precisely controlled. need to be positioned.

However, the various push button tuners that have been proposed so far have the disadvantage that they have a large number of component parts (it is extremely difficult to make the entire device smaller and thinner, and it is also difficult to assemble them). was there.

Furthermore, conventional push-button tuners often have a large loss in the transmission of operating force between the memory plate and the core slide, or between the tuning knob and the core slide (and the movement position of the core with respect to the tuning coil). There was also the problem that it became unstable and caused frequency shifts during tuning operations.

The present invention was proposed in view of the actual situation in such a thin push button tuner, and its purpose is to replace the memory plate of the push button operation section, the core slide of the tuning section, and the idler plate on the tuning knob side. By connecting them by a single trident-shaped link and further interposing a clutch mechanism between the tuning knob and the idler plate, the number of parts can be reduced and the entire tuner can be made smaller and thinner. Another object of the present invention is to provide a new push button tuner in which operating force is reliably transmitted through one link without variation in the interlocking state of each member.

Hereinafter, the present invention will be specifically explained based on illustrated embodiments.

In the figure, reference numeral 1 indicates the bottom plate of the push-button tuner, and 2 indicates a tuning shaft mounted vertically on the front end of the bottom plate 1.

It is a board.

A tuning shaft 3 is rotatably fitted into the plate 2, and a tuning knob 4 is fixed to the front end of the tuning shaft 3.

On the other hand, the rear end of the tuning knob 4 projects toward the back side of the mounting plate 2, and a friction wheel 5 is fixed to this projecting portion.

An idler plate 1 drive gear 6 is rotatably attached below the tuning shaft 3 on the mounting plate 2.

A friction wheel 7 is fixed to the rear end of the idler plate drive gear 6 so as to face the friction wheel 5 of the synchronizing shaft 3.

An idler roller 8 is disposed between the two friction wheels 5 and 70 so as to be able to move toward and away from both friction wheels.

This idler roller 8 is rotatably attached to a clutch lever 9, as shown in the third city view.

This clutch lever 9 has its upper end pivotally mounted using a support shaft 10 provided on the plate 2,
A torsion spring 11 provided at this pivot joint is always biased toward the synchronizing shaft 3, and this clutch lever
An idler roller 8 provided at 9 is pressed against friction wheels 5 and 7.

The lower end of the clutch lever 9 extends close to the bottom plate 1 of the tuner, and a kick arm 12 is engaged with this lower end.

This kick arm 12 is moved to the bottom plate 1 by pressing the push button.
When the push button is pressed, the clutch lever 9 is moved against the force of the torsion spring 110,
It is pressed in a direction away from the tuning shaft 3.

An idler plate 13 is disposed behind the tuning shaft mounting plate 2 on the bottom plate 1.

The idler plate 13 has a guide hole 14 extending in the lateral direction, and a pin 15 inserted into the guide hole 14.
It reciprocates in the width direction of the tuner while being guided by.

A rack gear 16 is formed upward on the front edge of the idler plate 13, and this rack gear 16 meshes with the idler plate drive gear 6.

Further, a guide hole 17 extending in the vertical direction is bored in the idler plate 13, and a guide roller 19 provided at the tip of the first arm 18a of the three-pronged link 18 is fitted into the guide hole 17 so as to be freely removable. .

The three-pronged link 18 is rotatably attached to a support shaft 20 fixed on the bottom plate 1.
Three arms project from the push button □ in the front-rear and side directions of the control device.

As described above, the first arm 18a projects toward the front of the push-button tuner, and the kite roller 19 provided at the tip thereof is fitted into the guide hole 17 of the idler plate 13.

The second arm 18b of the three-pronged ring 18 protrudes toward the side of the push button tuner, and has a core slide 21 at its tip.
is engaged.

That is, a connecting plate 22 is provided horizontally at the lower end of the core slide 21, a kite hole 23 extending in the width direction of the push button tuner is bored in the connecting plate 22, and a second arm is inserted into the guide hole 23. A guide roller 24 provided at the tip of 18b is fitted in such a way that it can be moved freely.

The third arm 18c of the three-pronged link 18 projects to the rear of the push-button tuner, and a memory plate 25 is connected to the tip thereof.

That is, a guide hole 26 extending in the vertical direction is bored in the memory plate 25, and a guide roller 27 provided at the tip of the third arm 18e is fitted into the guide hole 26 so as to be freely removable.

Note that this memory plate 25, like the memory plate in a conventional thin tuner, moves in the left-right direction of the push-button tuner by an amount corresponding to the position of the setting plate provided for each push-button when a push button is depressed. It is.

By the way, the core slide 21 is arranged vertically on the push button tuner, and this core slide 21
As an example, there are six cores 28 horizontally on the back of the
is installed.

The core slide 21 is slidably attached to two upper and lower guide shafts 29a and 29b disposed in the front and back direction of the push button tuner.

These guide shafts 29a and 29b are connected to the core slide 2.
A hook is attached so as to pass between a guide shaft mounting plate 30 disposed in front of the core slide 1 and a coil mounting plate 31 disposed in the rear of the core slide 21.

As shown in FIG. 4, a recess 32 is formed in the center of the upper part of the core slide 21, and the upper guide shaft 29 is slidably fitted into the recess 32.

On the other hand, a guide pipe 33 is fixed below the core slide 21 along the front-rear direction of the push button tuner, and a lower kite shaft 29b is slidably fitted into the guide pipe 33.

Regarding the coil attachment, tuning coils 34 are fixed horizontally on the back surface of the plate 31 in correspondence with the cores 28, and the cores 28 are inserted into each of the tuning coils 34 so as to be movable back and forth.

The rear end of this tuning coil 34 is in contact with a terminal board 35 for connecting the coil leads of each tuning coil, and is held between the coil mounting plate 31 and the terminal board 35 from the front and back.

The push button tuner of the present invention has the above-mentioned configuration, and its operation will be explained next.

First, when manually selecting a channel using the tuning knob, the tuning knob 4 is rotated, and the friction wheel 5 provided at the tip of the tuning shaft 3 is rotated.

Then, since the idler roller 8 is in pressure contact between the friction wheel 5 and the friction wheel 7 of the idler plate drive gear 6, the 50 rotations of the friction wheel are transferred to the friction wheel 7 via the idler roller 8.
, and the idler plate drive gear 6 rotates.

When this drive gear 6 rotates, the idler plate 13 meshed with it via the rank gear 16 moves laterally,
The first arm 18a of the link 18 is pressed laterally.

Then, since this link 18 rotates about the support shaft 20, the tip of the second arm 18b of the link 18 moves in the front-back direction of the push button tuner.

A core slide 21 is connected to the tip of this second arm 18b via a guide hole 23 and a guide roller 24, so that the core slide 21 is connected to the guide shafts 29a, 29.
Move back and forth guided by b.

As a result, the core 28 attached to the back side of the core slide 21 also moves back and forth, changing its insertion position into the tuning coil 34, and accordingly, the inductance of the tuning coil 34 changes to perform tuning.

At the same time, the third arm 18c of the three-pronged link 18 also moves in the opposite direction to the idler plate 13, so that the memory plate 25 connected to the tip of the third arm 18c moves in the opposite direction to the idler plate 13.
The core also moves laterally and stops at a position corresponding to the insertion position of the core.

On the other hand, when selecting a channel using a push button, when the push button is pressed, the kick arm 12 linked thereto moves and pushes the clutch lever 9 in the opposite direction to the tuning shaft 5 against the force of the torsion spring 11.

As a result, the idler roller 8 attached to this clutch lever 9 separates from the friction wheels 5 and 7, and as a result, the idler rank drive gear 6 and the friction wheel 7 rotate freely without being restricted by the synchronized shaft 3. become able to do so.

In this state, when the memory plate 25 is pressed by the setting pin provided on the push button, the memory plate 25
5 moves laterally.

Then, the third arm 18c of the three-pronged link, which is connected to the memory plate 25 through the kite hole 26 and kite roller 27, is pressed in the lateral direction, and the three-pronged link 18 rotates around its spindle 20. move.

As a result, the tip of the second arm 18b of the link 18 moves back and forth, and the core slide 21 connected thereto also moves back and forth, changing the insertion position of the core 28 into the tuning coil 34.
Synchronization takes place.

In this case, since the first arm 18a of the link 18 is connected to the idler plate 13, the idler plate 1
3 also moves in the opposite direction to the memory plate 25.

However, in this case, the idler plate 13 only rotates the idler plate drive gear 6 and does not rotate the idler roller 8 or the synchronizing shaft 3, so the idler plate 13 moves smoothly, and the link 18 that interlocks with the idler plate 13 moves smoothly.
Also, the movement of the core slide 21 and the memory plate 25 is performed smoothly.

As shown in the above embodiments, the push button tuner of the present invention has a memory plate, a core slide, and an idler plate of a clutch mechanism that are interlocked with each other, and are connected to each other by one three-pronged link, and are moved simultaneously. Therefore, the number of parts for interlocking these parts is significantly reduced compared to the conventional push-button tuner, and as a result, the configuration of the tuner is simplified, making it smaller and thinner. Become.

In addition, since the memory plate, core slide, and idler plate, which move in different directions, are connected by a single three-pronged link, each member can move smoothly, and even if pressing force is applied from the memory plate side. However, even when a pressing force is applied from the idler plate side, the amount of movement of the core slide is equalized, so there is no fear of frequency deviation, and stable tuning operations can be performed.

Note that the present invention is not limited to the illustrated embodiments (
For example, as a clutch mechanism disposed between a synchronizing shaft and an idler plate, in addition to a clutch mechanism using a friction wheel and an idler roller, a clutch mechanism using an idler gear, or a clutch mechanism using the side surface of a disc-shaped clutch plate as a rotational force transmission surface. A latch mechanism can also be used.

Further, as for the guide mechanism of the idler plate, core slide, and even memory plate, it is possible to appropriately adopt the guide mechanism of the memory plate and core slide that has been conventionally employed in push button tuners.

Furthermore, the means for connecting each of these members to the tip of the three-pronged link is not limited to the combination of a guide hole and a guide roller (a combination of a simple pin and a guide hole, or a combination of a roller and a groove, etc.) is also possible. Can be adopted as appropriate.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the tuning shaft portion and core slide portion of the push button tuner according to the present invention, FIG. 2 is a plan view of the same, and FIG.
The figure is a front view of the clutch mechanism portion same as above, and FIG. 4 is a front view of the core slide portion. 1... Bottom plate, 2... Tuning shaft mounting plate, 3
... Tuning axis, 4... Tuning knob, 5.
... Friction wheel, 6 ... Idler plate drive gear, 7 ... Friction wheel, 8 ... Eye troller, 9 ... Clutch lever 110 °°゛・
°. Support shaft, 11...Torsion spring, 12...
...Kick arm, 13...Idler plate, 14...Guide hole, 15...Pin,
16... Rack gear, 17... Guide hole, 18... Trifurcated link, 18a...
First arm, 18b...Second arm, 18c...
...Third arm, 19...Guide roller, 20
......Spindle, 21...Core slide, 2
2... Connecting plate, 23... Guide hole, 2
4... Guide roller, 25... Memory plate, 26... Guide hole, 27...
... Guide roller, 28 ... Core, 29a,
29b...Guide shaft, 30...
Mounting plate, 31... Coil mounting plate, 32...
・・Concave part, 33・・・・Guy: Papipe, 34・・・・
...Tuned coil, 35...Terminal board.

Claims (1)

[Claims] 1. An idler plate is connected to the tuning shaft of the push-button tuner via a clutch mechanism, and the idler plate is arranged to be movable in the width direction of the push-button tuner,
A first arm of a three-pronged link extending toward the front of the push-button tuner is connected to the idler plate, and a second arm of the three-pronged link extends toward the side of the push-button tuner. The second arm is connected to a core slide that is movable back and forth relative to the push button tuner, and the third arm of the three-pronged link extends toward the rear of the push button tuner. A push-button tuner characterized by a connected memory plate that is movable in the width direction of the tuner. 2. Provide a rack gear on the idler plate, mesh the idler plate drive gear with this rack gear, and
An idler roller attached to a clutch lever is disposed between the synchronizing shaft and the idler plate driving gear, and the rotation of the synchronizing shaft side is transmitted to the idler plate driving gear via the idler roller. A push button tuner according to claim 1, which uses a mechanism.