JPH0261808B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a push button tuner, and in particular, improvements have been made in the clutch mechanism and the arrangement position of the tuning shaft portion for manual operation.

A push-button tuner uses a push button for tuning to rotate a crank by a predetermined angle, and a tuning core that is linked to the crank is inserted into and removed from a coil to perform tuning (tuning). In addition to tuning using the push button, this push button tuner is equipped with a tuning knob for manual operation, and by rotating this tuning knob, the crank is rotated to tune the station set using the push button. It is designed to perform tuning other than that, to make fine adjustments during tuning, and to set the tuning frequency for each push button. Furthermore, when operating the push button, if the rotating crank and the tuning knob are left connected, the load will increase and smooth button operation cannot be expected, so a clutch mechanism is provided between the crank and the tuning knob. When the push button is operated, this clutch is disengaged to rotate only the rotary crank without rotating the tuning knob, thereby lightening the load on the push button.

Incidentally, conventionally, such a clutch mechanism and a tuning knob interlocked with the clutch mechanism have been provided so as to protrude outside the frame side plate of the push-button tuner. That is, in a push-button tuner, a plurality of push buttons were arranged on the front part, and a clutch mechanism and a tuning knob were arranged on the sides thereof.
However, as push-button tuners have recently become smaller, proposals have been made to reduce the width of the entire tuner. In this case, it is impossible to reduce the width of the push-button tuner body beyond the limit determined by the number and diameter of the tuning coils or the width of the operating push-button, so the clutch mechanism is placed outside the frame. It is necessary to make the width of the tuning knob as narrow as possible. However, all conventional push-button tuners are constructed on the premise that a clutch mechanism and a tuning knob for manual operation are provided on the outside of the frame. However, the clutch mechanism and tuning knob still protruded, and there was a limit to how much the overall width of the tuner could be reduced.

The present invention has been proposed in view of the above-mentioned points, and its purpose is to dispose the clutch mechanism and the synchronizing knob part that interlocks with the clutch mechanism above the push button and the rotating crank. The object of the present invention is to provide a push-button tuner in which all mechanisms are arranged inside the frame and the width of the entire tuner is extremely small.

The present invention will now be explained in detail with reference to illustrated embodiments.

In the figure, reference numeral 1 designates the left and right side plates of the push-button tuner, and 2 designates the front panel. The front panel 2 is formed of a rectangular push button mounting portion 2a extending left and right, and a tuning shaft mounting portion 2b extending in an L-shape above the push button mounting portion 2a. Of the left and right side plates, the side plate on the tuning shaft mounting portion 2b side has the same height as from the lower part of the push button mounting portion 2a to the upper end of the tuning shaft mounting portion 2b.

A bearing 3 is fixed to the tuning shaft mounting portion 2b, and a tuning shaft 4 is fitted into the bearing 3 so as to be rotatable and slidable back and forth. The front end of this tuning shaft 4 projects to the front side of the front panel 2, and a tuning knob 5 is provided on this projecting portion. On the other hand, a slide gear 6 is integrally formed at the tip of the tuning shaft 4, and this slide gear 6 projects outward from a notch 7 formed in the bearing 3 of the tuning shaft 4.

A bearing 3 for the tuning shaft 4 is provided on the back side of the tuning shaft mounting part 2b.
A power switch 8 is fixed adjacent to.
The operating rod of the power switch 8 projects forward of the front panel 2, and the tip of the operating rod 9 is bent into a key shape and engages with the tip of the tuning shaft 4.

Furthermore, the bearing 3 of the tuning shaft 4 is attached to the tuning shaft mounting portion 2b.
A bearing 10 is provided parallel to this, and an idler gear 11 is rotatably mounted within this bearing 10. The idler gear 11 meshes with the slide gear 6 exposed in the notch 7 of the bearing 3. A universal joint 12 is provided on the back surface of the idler gear 11, and a base end portion of a pinion gear shaft 13 is fixed to this universal joint 12. This pinion gear shaft 13 is supported by a letter-shaped fork bracket 14 fixed to the inside of the frame side plate 1. That is, the pinion gear shaft 13 is positioned in the vertical direction by rotatably fitting a narrow diameter portion formed on the pinion gear shaft 13 into a groove on the fork bracket side. A pinion 15 is provided at the tip of this pinion gear shaft 13, and this pinion 15 meshes with a crown gear of a clutch mechanism as described below.

The clutch mechanism is disposed on the inner surface of the frame side plate 1, and is located above the armrest of the push button built into each frame. That is, a clutch shaft 16 is fixed to the upper rear portion of the frame side plate 1 so as to project toward the inside of the frame side plate 1. This clutch shaft 16
A clutch gear 17 is rotatably fitted into the tip. Further, a sleeve 18 is rotatably and slidably fitted into the side plate side of the clutch gear 17 on the clutch shaft 16.
A crown gear 19 and a disc-shaped spring plate 20 are attached to 8. The crown gear 19 is provided opposite to the side surface of the clutch gear 17,
A friction engagement member 21 such as synthetic rubber sandpaper is provided on the opposing surface. A pinion 15 provided at the tip of the pinion gear shaft 13 meshes with the crown gear 19 . The pinion 15 is urged toward the crown gear 19 by pressing its tip with a disc-shaped spring plate 20, and is configured to prevent collision between the pinion 15 and the crown gear 19. .

A clutch lever 22 is engaged with the side plate side of the sleeve 18 on the clutch shaft 16. This clutch lever 22 is movably attached to the rear frame of the push button tuner, and
It is designed to be able to swing left and right around the mounting part. And this clutch lever 22
The end (front end) extends close to the back of the front panel and is located just below the universal joint 12. The front end of the clutch lever 22 is provided with a roller 23 for engagement with a locking lever, which will be described later. Further, a coil spring 24 is compressed between the clutch lever 22 and the frame side plate 1. That is, the clutch lever 22 is biased toward the clutch gear 17 by the coil spring 24, and the crown gear 19 engaged with the clutch lever 22 is biased toward the clutch gear 17.
The clutch gear 17 is also urged toward the clutch gear 17 side.

A kick arm 25 is arranged on the back side of the front panel 2 in parallel with the front panel 2. This kick arm 25 has both ends rotatably supported on the left and right side plates 1 of the frame. A pressing piece 26 is integrally formed at the end of the kick arm 25 on the tuning knob side.
This pressing piece 26 is in contact with an engaging roller 23 formed at the front end of the clutch lever 22.

Further, arms 28 of each push button 27 are attached to the front panel 2 so as to be movable back and forth in a direction perpendicular to the front panel 2. The push button 27 is provided with a pressing piece 29 extending parallel to the arm 28, and the tip of the pressing piece 29 is brought into contact with the push arm 25. That is, when the push button 27 is pressed, the push piece 29 is configured to rotate the kick arm 25 toward the back of the push button tuner about its fulcrum. Further, a fan-shaped setting plate 30 is provided approximately at the center of the arm 28 of each push button so that its mounting angle can be adjusted. This setting plate 30 is attached to the kick arm 25.
It is constructed so that it can come into contact with a crank rod 32 of a rotating crank 31 provided on the back surface of the crank arm 25 in parallel with the crank arm 25. The rotating crank 31 also has both ends rotatably supported on the frame side plate 1 of the push button tuner. This rotating crank 31
consists of left and right side plates and two crank rods 32 that connect them.
A crank gear 33 is formed on the side plate on the side of the clutch gear 17 located at the side end of the clutch mechanism 1, and this crank gear 33 is meshed with the clutch gear 17 of the clutch mechanism. Incidentally, as the crank gear 33, a double gear biased by a spring is used to prevent collision with the clutch gear 17.

Above this rotary crank 31 is a core slide 3 that is movable along the front and back direction of the push button tuner.
4 will be placed. For example, this core slide 34 is slidably attached to a guide shaft 35 provided in the front-rear direction of the push button tuner, and the upper end of the side plate portion of the rotary crank 31 is engaged with this core slide 34. There is. This core slide 3
A plurality of cores 36 are fixed to the back of the push button tuner 4 toward the rear of the push button tuner. The plurality of cores 36 extend toward a coil mounting plate 37 provided parallel to the front panel at the rear of the frame of the push-button tuner. It can be inserted freely.

Above the core slide 34, a push button tuner pointer mechanism is further arranged. That is, a support plate 39 extends horizontally from the upper edge of the front panel 2 toward the rear of the push-button tuner, and a movable plate 40 is rotatably mounted on the support plate 39 about a support shaft. ing. This moving plate 40
has two arms extending approximately at right angles, and a pin 41 is provided at the tip of one of the arms to protrude downward, and this pin 41 engages the core slide 34 at right angles to the direction of movement thereof. It is inserted into a long hole 42 provided. On the other hand, a pointer plate 43 is rotatably attached to the tip of the other arm of the movable plate 40 via a support shaft. The tip of the pointer plate 43 extends above the front panel of the push-button tuner, and a pointer is attached to the tip of the pointer plate 43. On the other hand, the rear end of the pointer plate 43 extends to the rear of the push-button tuner, and a protruding piece 44 is integrally formed at the extended end to face downward. The projecting piece 44 is slidably fitted into a long hole 46 of a guide plate 45 provided at the upper edge of the coil mounting plate 37.

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

To turn on and off the power switch of this push button tuner, use the tuning knob 5 fixed to the tip of the tuning shaft 4.
Push it toward the frame. Then, this tuning shaft 4 is instructed to be able to move back and forth within the bearing 3, so it enters the frame side, and at that time, the operating rod 9 that is engaged with this tuning shaft 4 is pushed in, and the power switch 8 is turned on. It becomes ON. In this case, the slide gear 6 provided at the tip of the tuning shaft 4 moves to the rear of the tuner while remaining engaged with the idler gear 11. When the power switch 8 is turned on, the tuning shaft 4 returns to the front again.

Operate the push button tuner that is powered on in this way,
To select a station, do the following:

When manually selecting a station using the tuning knob 5, when the tuning knob 5 is used to rotate the tuning shaft 4, the slide gear 6 provided at the tip of the tuning shaft 4 engages with the idler gear 11, so the universal joint 12 is connected to the idler gear 11. The pinion gear shaft 13 connected thereto rotates, and the crown gear 19 meshing with the pinion at the tip of this pinion gear shaft also rotates. In this state, the sleeve 18 to which the crown gear 19 is attached is pressed toward the clutch gear 17 by the force of the coil spring 24, so that the crown gear 19 and the clutch gear 17 are crimped together via the friction engagement member 21. There is. Therefore, due to the rotation of the synchronized shaft, the crown gear 1
When the clutch gear 9 rotates, the clutch gear 17 also rotates.
When the clutch gear 17 rotates, the crank gear 33 meshing with it also rotates, and the rotating crank 31 integrated with this crank gear rotates. As the rotating crank 31 moves, the core slide 34 engaged with the rotating crank 31 moves back and forth within the frame of the push button tuner along the guide shaft 35, and is fixed to the core slide 34. The core 36 moves and the coil 38
The insertion position relative to the inside changes. As a result, the inductance of the coil changes and tuning occurs.

In this case, the pointer mechanism that displays the insertion position of the coil, that is, the tuned frequency, moves as follows. That is, when the core slide 34 moves back and forth with the rotation of the rotation crank 31, one arm of the movable plate 40 that is engaged with the elongated hole 42 of the core slide 34 is pressed, and the movable plate 40 moves toward its support. Rotate around an axis. Then, the pointer plate 43 connected to the other arm of the movable plate 40 swings left and right around its rear end, and as a result, the position of the tip of the pointer plate 43 moves left and right, corresponding to the coil insertion position. It will stop at the exact position. In this case, the protruding piece 44 provided at the rear end of the pointer plate 43 slides along the elongated hole 46 of the guide plate 45, so that the tip of the pointer plate 43 is placed in a relatively straight line along the front panel 2. This will show a trajectory.

When selecting a channel using the push button 27, the push button 27 is pressed and a fan-shaped setting plate 30 provided on the arm 28 rotates the rotary crank 31 by a predetermined angle. And this rotating crank 31
Due to the movement of the core slide 34 engaged with this
Tuning is achieved by moving the core and changing the insertion position of the core attached to it within the coil. By the way, when synchronizing using the push button 27, it is necessary to disengage the clutch in conjunction with the pressing and inserting of the push button. That is, the pressing piece 29 provided on the push button 27 moves forward, and the kick arm 25, which is in contact with the tip of the pressing piece 29, rotates about its fulcrum toward the rear of the tuner. Then, the pressing piece 26 provided on the kick arm 25 presses the front end of the clutch lever 22 toward the side of the frame side plate 1 (in the lateral direction). In this case, the pressing piece 26 and the clutch lever 22 are in contact with each other via the engagement roller 23, so that both slide smoothly. clutch lever 2
2 is pressed toward the frame side plate 1 side, the pressing force of the coil spring 24 applied via the clutch lever 22 is released, and the crown gear 1
9 and clutch gear 17 are released. As a result, the clutch gear 17 can freely rotate without being restricted by the movement of the crown gear, the pinion gear shaft, the synchronizing shaft, etc. that are engaged with the crown gear. Therefore, push button 27 is pressed as described above.
When the rotation crank 31 is rotated by pressing ,
Since this rotating crank 31 simply rotates only the clutch gear 17, it rotates extremely smoothly.

As shown in the above embodiments, the push-button tuner of the present invention has a tuning shaft and a clutch mechanism interlocked with the tuning shaft disposed inside the frame side plate, so that the width of the push-button tuner is equal to that of the operating push button. It has the advantage of being reduced to almost the same width as the installation space.

In particular, in push-button tuners, the upper part of the core slide that supports the coil bobbin and core, that is, the upper part of each push button, is a space for installing printed circuit boards and other electronic components, so the clutch mechanism installed above the push button is If a part occupies a large space, the installation space for other electronic components increases accordingly, making it impossible to install the necessary components, or requiring the components to be installed in a separate location that protrudes from the push button tuner body. , there is a possibility that it will be impossible to downsize the push button tuner as a whole.

On the other hand, in the push button tuner of the present invention, the clutch gear is disposed on the side of the crown gear to face each other via a frictional engagement member, and the crank gear of the rotary crank is directly engaged with the clutch gear. ,
The structure of the clutch mechanism itself is simplified, and there is no need for an extra gear between the clutch mechanism and the rotating crank, and the width of the clutch mechanism as a whole can be made narrower accordingly. Furthermore, the crown gear and clutch gear are rotatably fitted into a clutch shaft that protrudes inward from the frame side plate, with the crown gear facing the frame side plate and the clutch gear facing inside, and are arranged near the frame side plate. The pinion of the pinion shaft is meshed with the crown gear, and the crank gear of the rotating crank is arranged in the space on the side of the pinion shaft and behind the synchronized shaft, and directly meshes with the clutch gear. Therefore, the width of the entire mechanism for transmitting rotation to the rotary crank via the clutch mechanism can be made extremely narrow. As a result, it is easy to secure a space for installing electronic components and other components, and the entire push button tuner can be miniaturized.

Furthermore, in a push-button tuner, the knob attached to the front side of the tuning shaft needs to be of a certain size for operational purposes, but this knob cannot protrude from the side of the frame of the tuner. Therefore, the tuning shaft will be located inward by the radius of this knob, but if this tuning shaft is extended and meshed with the crown gear of the clutch mechanism,
The position of the crown gear is inevitably outside the tuning shaft, and it is impossible to locate it close to the frame side plate. And as you can see, the closer the crown gear is to the inside of the frame, the more
The width of the clutch mechanism protruding from the top of the push-button tuner becomes wider, making it impossible to downsize the tuner accordingly.

However, in the present invention, by not extending the tuning shaft 3 as it is but by providing a gear 11 in the middle, the pinion gear shaft 13 that meshes with the crown gear can be placed closest to the side frame. Therefore, the crown gear 19 also has the synchronized shaft 3.
Since it is located closer to the frame 1 than on the extension of , the width of the clutch portion can be made narrower, and the push button tuner can be made smaller.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the push button tuner according to the present invention, Fig. 2 is a front view of the same, Fig. 3 is a left side view of the same, Fig. 4 is a longitudinal sectional view of the same, and Fig. 5 is a main It is an enlarged sectional view of the clutch mechanism part in the invention. 1... Frame side plate, 2... Front panel, 3...
Bearing, 4... Tuning shaft, 5... Tuning knob, 6... Slide gear, 7... Notch, 8... Power switch, 9... Operating rod, 10... Bearing, 11... Idler gear, 12... Universal joint, 13... Pinion gear shaft,
14...Fork bracket, 15...Pinion, 1
6... Clutch shaft, 17... Clutch gear, 18... Sleeve, 19... Crown gear, 20... Disc top spring plate, 21... Frictional engagement member, 22... Clutch lever, 23... Engagement roller, 24... Coil spring, 25 ...Kick arm, 26...Press piece, 27...
Push button, 28... Bracelet, 29... Pressing piece, 30... Setting plate, 31... Rotating crank, 32... Crank rod, 33... Crank gear, 34... Core slide, 35... Guide shaft, 36... Core,
37... Coil mounting plate, 38... Coil, 39... Support plate, 40... Moving plate, 41... Pin, 42... Long hole, 4
3...Pointer plate, 44...Protrusion piece, 45...Guide plate, 46
...Long hole.

Claims (1)

[Claims] 1. In a push button tuner which disengages a clutch mechanism and rotates a rotating crank when a push button is pressed, and which moves a core in a tuning coil back and forth in conjunction with the rotating crank, the A manual tuning shaft is installed above the push button, and a pinion gear shaft whose one end meshes with the tuning shaft is arranged between the tuning shaft and the frame side plate, and further behind the tuning shaft and connected to the frame side plate. has a clutch shaft protruding inward, a crown gear and a clutch gear facing each other via a friction engagement member are rotatably fitted into the clutch shaft with the clutch gear inside, and the other end of the pinion gear shaft is fitted into the clutch shaft. A push button tuner characterized in that a provided pinion gear is meshed with the crown gear, and a crank gear provided on the rotating crank is directly meshed with the clutch gear.