JPS59818Y2 - Push button tuner - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a push button tuner, in which the power transmission part from the manual tuning shaft of the member to be memorized is guided by a roller to improve the efficiency of power transmission and to allow the member to be memorized to slide smoothly. The present invention aims to provide a push-button tuner that can improve tuning accuracy.

In conventional push-button tuners, the rotational force of the manual tuning shaft is transmitted through gears in the clutch unit to a rack formed on the memorized member, and the tuner is generally selected by sliding the memorized member. However, there was no one that transmitted the rotational force (power) through rolling friction.

The push button tuner of the present invention not only transmits the power by rolling friction, but also presses a roller supported on a frame at a position slightly offset from the power transmission part of the member to be memorized, so that the power transmission part is slightly Elastic deformation eliminates slippage during power transmission, improves the efficiency of power transmission, improves the sliding of the memorized member, and improves the accuracy of channel selection. One example will be explained.

1A and 1B are respectively a plan view and a side view of one embodiment of the push-button tuner according to the present invention, and FIGS. 2 and 3 are respectively a perspective view of the main part of the push-button tuner and a vertical cross-section of 7 parts thereof. A partial view, FIG. 4 is an exploded perspective view of the operating rod of the push button tuner.

In FIGS. 1A and 1B, the frame lower plate 2 of the push button tuner 1 is
The bottom plate 2a is formed by bending the front and rear side plates 2b and 2C, and as shown in FIG. )
is provided.

Also, l pairs of pin portions 2e are provided on the bottom plate 2a corresponding to each guide groove 2d.
, a square hole 2f and a screw hole 2g are provided, and the front plate 2b is provided with a long hole 2h, and the bottom plate 2a also has a pin portion 2i,
2j, a convex portion 2k is provided.

Also, in FIGS. 2 and 3, a cam plate 21 (described later) of the frame 2
1 provided corresponding to the bent convex portion 21C (cap 22) of
A roller 23 is rotatably supported on the pair of raised portions 21 .

3 is a plurality of operating rods, each of which has a main body 4.3 as shown in FIG. Specifier 5. Push button 6. It consists of upper and lower cover plates 7 and 8.

The operating rod main body 4 is made up of a substantially metal strip plate with a stepped portion 4a, a tip rod portion 4b, a fork-shaped front side, a fixed portion 4C, an elastic rod portion 4d, and a pair of holes 4e and 4d. 4f, a notch 4g, a pivot hole 4h, and a spring holder is a convex portion 41. long hole 4j,
It has a cam protrusion 4k.

The regulator 5 has a disk shape and has a pair of abutting portions 5 a and 5 b on the convex portion on the lower side of the upper surface, and is loosely fitted into the pivot hole 4 h of the operating rod 3 .

The push button 6 is made of resin and includes a recess 6a, a cam portion 6b, and a through hole 6C.
The concave portion 6a is connected to the operating rod main body 4, and the side rod portion 4C,
4d, and the pin 9 is inserted into the hole 6C and the elongated hole 4j in common.

The cover plate 7 has a pair of holes 7a, 7b, semicircular holes 7c, 1
The cover plate 8 has a pair of pins B.
The pins 8b a and - are implanted and fixed.

The cover plates 7 and 8 are brought into contact with the upper and lower sides of the operating rod main body 4,
Furthermore, a stopper piece 10 (having a pair of holes 10a) is brought into contact with the upper tip of the cover plate 7, and a pair of pins 8a are attached to the operating rod body 4. Cover plate 8. Each hole 4e of the stopper piece 10
, 7a, and 10a in order and are tightened to make the whole into one piece.

At this time, the regulator 5 is held by the cover plates 7 and 8 so as not to be displaced in the vertical direction, and the contact portions 5 a and 5 b protrude upward from the semicircular hole 7C, and the pair of single-shaped portions 7 d are connected to the operating rod. 4 along the step portion 4a of the side rod portion 4C, 4d and its vicinity.

Further, the pin portion 8b of the lower cover plate 8 has holes 4f and 7b.
are sequentially inserted into the holes 4f and 7b, and the roller 11 fitted into the holes 4f and 7b is rotatably fitted into the pin portion 8b.
The upper part of the cover plate 7 protrudes from the upper surface of the cover plate 7.

After that, the operating rod 3 is completed.

As will be described later, when the roller 11 comes into sliding contact with the curved cam portion 27a-2 of the clutch plate 27, the roller 11 rotates and rolls and the frictional force becomes small, so that the operating lever 3. The clutch plate 27 slides smoothly, improving operational feel and tuning accuracy.

12 is a spring holder and a plurality of pieces for guiding the operating rod;
In the figure, the through hole 12a, the positioning square convex part 12b on the lower surface, and the spring receiver protruding toward the front have a convex part 12C, and the square convex part 12b is square in front of each guide groove 2d of the bottom plate 2a of the frame lower plate 2, respectively. The spring receiver is fitted into the hole 2f and the convex portion 1
2 C is installed by inserting it through the elongated hole 2h and projecting it forward,
As will be described later, the screw 13 connects the screw hole 2 through the hole 12a.
It is screwed to g.

The convex portion 12C of the spring receiver is opposed to the convex portion 41 of the operating rod 4 at a distance, and the coil spring 14 is interposed therebetween.

The coil spring 14 has a flat rectangular shape in which the height dimension of the winding cross section is smaller than the horizontal width dimension, and the height is set to be smaller than the height of the push button 6, contributing to the overall thinning.

The coil spring 14 is disposed between the fixed rod portion 4C and the elastic rod portion 4d in the width direction, and due to the flat winding cross-sectional shape described above, when the spring contracts, undulation deformation occurs in the height direction, but there is no undulation in the width direction. Since almost no deformation occurs, the coil spring 14 deforms and comes into contact with the side rod parts 4C and 4d, and the operation rod 3
It does not cause any inconvenience such as sliding resistance.

Above operation lever 3. Piece 12. The actual procedure for assembling the coil spring 14 is to first insert the front end of the side rod portions 4C, 4d of the operating rod 3, on which the push button has not yet been assembled, into the elongated hole 2n from inside the front side plate 2b, and then Part 4b and side rod part 4C
, 4d in the guide groove portions 2d-1 and 2d of the guide groove 2d, respectively.
d-2 and connect both ends of the bottom of the stopper piece 10 to the bottom plate 2.
a Assemble it by touching it to the top surface.

Subsequently, the piece 12 is assembled to the bottom plate 2a with the side bars 4C, 4d in the open position, and the push button 6 is assembled to the front ends of the side bars 4C, 4d.

Finally, the coil spring 14 is assembled by fitting both ends of the coil spring 14 between the convex portion 41 of the operating rod body 4 in the push button 6 and the convex portion 12C of the bridge 12.

The present invention is not limited to this, but the coil spring 14 is placed first, and the spring holder is provided with the convex portion 4i,
The rear push button 6 assembled between 12C and 12C may be installed, but in any case, the coil spring 14 can be installed after the operating rod 3 is assembled to the frame lower plate 2, so the conventional operating rod 3. Compared to the case where the coil spring 14 was assembled at the same time, the operating rod 3
And the coil spring 14 can be easily assembled.

By assembling the coil spring 14, the operating rod 3 is urged in the direction of arrow A, and the stopper piece 10 comes into contact with the l pair of pin portions 2e and stops.

Here, since the operating rod 3 has a structure in which the elastic rod portion 4d is elastically displaced in a plan view, the tip end portion 4b of the operating rod 3 has the guide groove portion 2d.
-1, and the fixed rod part 4C has its upper and lower surfaces guided by the upper and lower surfaces of the elongated hole 2h, and its both sides are guided by the elongated hole 2h.
By being guided between one inner surface of h and one outer surface of the piece 12, it slides smoothly in the directions of arrows A and B without play.

Further, the regularizer 5 is normally in a neutral rotational position where the abutting portions 5a and 5b are aligned in the directions of arrows C and D.

As shown in FIG. 5B, the thickness of the operating rod 3 is approximately the same as or slightly smaller than the depth of the guide groove 2d, and is accommodated within the depth of the guide groove 2d.

Therefore, the operating rod 3 in this part no longer has its own thickness, and the thickness can be reduced by that amount. Conventionally, the limit for reducing the overall thickness was about 5.5 mm, but with this configuration, the thickness can be reduced to about 3 mm. Conversely, the thickness of the frame lower plate 2 can be made relatively large, approximately the same as the thickness required for the operating rod 3, and the strength of the frame can be improved.

The slide limit position of the operating rod 3 in the direction of arrow A is determined by the stopper piece 10. The contact is not limited to the contact of the pin portion 2e, but may be performed by bringing the step portion 4a of the operating rod main body 4 into contact with the front end of the guide groove 2d.

In addition, the upper end piece 12 has a coil spring holder that, other than its function, only guides the fixed rod part 4C of the operating rod 3, but the piece 1 is limited to this.
A predetermined protrusion or the like may be further integrally formed on the cam plate 2, so that the operating rod 3 comes into contact with the slide limit in the arrow A direction, or one edge side guide of the cam plate 21 as it slides in the arrow C and D directions, which will be described later. You may also have them do this.

Reference numeral 21 denotes a cam plate, which has a plurality of V-shaped cam parts 21a (cam right side 21 al, cam left side 21 a-2) at equal pitches at the front end, as shown in FIGS. 1A and B and FIG. There is a long hole 21b at the right end in Figure A (left end in Figure 2) and a bent convex part 21 as a power transmission rod-like part extending in the directions of arrows C and D in the figure.
A long resin cap 22 having a U-shaped cross section is fitted and fixed to the bent convex portion 21C.

The cam plate 21 is placed in contact with the upper surface of the bottom plate 2a of the lower frame plate 2, and is slidable in the directions of arrows C and D by the guidance of the pin part 21, but normally the V-shaped trough of the V-shaped cam part 21a is located at a neutral sliding position corresponding to the center of each operating rod 3, and is spaced apart from and faces the abutting portions 5a and 5b of the regulator 5.

Reference numeral 24 denotes a rotating lever, which is pivotally supported by a pin 25 on the bottom plate 2a, with one end of the pin 24a engaged with a long hole 21b of the cam plate 21, and a bent protrusion 24b and a rotating roller 26 provided at the other end. In between, the core holding plate 3 of the μ tuning unit 29, which will be described later.
5 is inserted and secured.

27 is a clutch plate, as shown in FIGS. 1A and B and FIG.
7a-1. It has curved cam portions 27a-2) at equal pitches, and a convex portion 27b at the right end in FIG. 1A (left end in FIG. 2),
and a pressing rod portion 27C extending in a stepped manner.

Like the cam plate 21, the clutch plate 27 is placed in contact with the upper surface of the bottom plate 2a, and is slidable in the directions of arrows C and D by the guidance of the pin portion 2j, but is usually stretched between the convex portions 27b and 2. The coil spring 28 is biased in the direction of arrow C and stops when it comes into contact with a predetermined portion of the lower frame plate 2. At this time, as shown in FIG. are close to or in contact with each other.

Here, the cam plate 21. The clutch plate 27 also prevents the operating rod 3 from floating by coming into contact with the upper surface of the bottom plate 2a.

29 is a μ tuning unit, which has a frame 30 (lower end notch 3
0 a) in the case 31 fixed to the case 31, each having three A
A Coco Coil 32 for M, a Fuco Coil 33 for FM, and a two-core holding plate 35 are assembled by a guide 36 so as to be slidable in the directions of arrows A and B, and are screwed to the right end of the upper surface of the bottom plate 2a in FIG. 1A.

At this time, the other end of the rotating lever 24 enters into the frame 30 through the notch 30a, and the lower end of the core holding plate 35 is fitted between the protrusion 24b and the roller 26 and secured.

Since the μ tuning unit 29 has the core 34 (core holding plate 35) and coils 32 and 33 assembled into a unit in advance, it is easy to assemble it to the frame lower plate 2, and the μ tuning unit 29 can be easily attached to other manual tuners. It can also be used for a wide range of applications.

Reference numeral 40 designates a clutch unit, in which an intermediate shaft 42 is supported on a plate-shaped clutch unit main body 41 in FIG. The other end of the roller 46 supported on one end 44a of the rotating arm 44 is connected to the intermediate shaft 42 in a universal joint shape, and the main body 41 and the support plate 47
It has a structure in which a drum 48 whose outer circumferential surface is knurled is supported between them, and is screwed to the front side plate 2b of the frame lower plate 2.

At this time, the roller 46 is in pressure contact with the outer knurled surface of the drum 48 due to the bias of the spring 45, and is in a state of power transmission to each other.
The arm 44 is in frictional pressure contact with the upper surface of the cap 22 of No. 1, and the other end 44b of the arm 44 is closely opposed to the pressing rod portion 27C of the clutch plate 27.

The center line of the drum 48 in the vertical direction in FIG. 2 is located at a position slightly deviated in the direction of arrow C by the roller 23 supported on the lower frame plate 2, and the cam plate 21 has its bent convex portion 21C (cap 22) The lower roller 23 rolls and frictionally guides the slide in the directions of arrows C and D, which improves the sliding of the slide.
Since the distal end side of the drum 48 can be elastically deformed from the support point by the lower roller 23, the press contact of the drum 48 to the cap 22 is made more effective.

Therefore, since there is no slippage between the drum 48 and the cap 22, when the drum 48 rotates, the cam plate 21
8's power is transmitted efficiently and slides smoothly without any play.

Note that the intermediate shaft 42 is connected to a manual tuning shaft (not shown) via a transmission gear.

In FIG. 5B, a frame upper plate 49 is closed on the upper surface of the frame lower plate 2 and fixed with screws 13.

In the above embodiment, the cam plate 21. If the lower surface of the clutch plate 27 and the upper surface of the bottom plate 2a are plated with Cu or the like to make them smooth, the cam plate 21. The slip resistance of the clutch plate 27 is reduced, and the clutch plate 27 can slide smoothly and its performance can be improved.

Further, in the above embodiment, the main body 4 of the operating rod 3 is provided with a step 4a, but the step is not provided and the guide groove 2d of the bottom plate 2a of the frame lower plate 2 is connected to the lower part of the front side plate 2b. It may be configured such that a cutout is formed by extending the guide groove 2d, and the front portion of the operating rod 3 fitted in the guide groove 2d projects forward from the cutout.

Next, the operation of the push button tuner 1 having the above configuration is shown in FIG.
This will be explained using FIGS. 6 and 7.

As shown in FIG. 5A, the regulator 5 and the cam plate 21 are at positions slightly displaced from the neutral rotation position and the neutral slide position, respectively, and the desired station is selected in accordance with the position of the cam plate 21. do.

Therefore, when the middle rubbing rod 3 in FIG. In order to contact the cam right side 21a-1 of the portion 21a, the regulator 5 starts rotating clockwise, and then the left contact portion 5b comes into contact with the cam left side 21a-2, and the contact is made as shown in FIG. The parts 5a and 5b are the cam right side 21a-1 and the cam left side 21a, respectively.
-Abuts in common on 2.

When the push button 6 is pushed further, only the push button 6 starts to slide relative to the operating rod body 4 in the direction of arrow B and reaches the position shown in FIG. 6, so the pin 9 moves from the front end of the long hole 4j to the rear end. As the cam convex portion 4k of the elastic rod portion 4d rides up on the cam portion 6b, the elastic rod portion 4d is elastically deformed in the direction of the fixed rod portion 4C, the diameter of the pivot hole 4h is reduced, and the regulator 5 is moved around its outer periphery. It is restrained and cannot be rotated.

Here, when the pushing force is released, the operating rod 3 is moved by the coil spring 14.
As a result, the stopper piece 10 slides back in the direction of the arrow A and returns to the position where the stopper piece 10 contacts the bottle portion 2e as shown in FIG.

During this time, the roller 11 of the operating rod 3 presses the curved cam portion 27a-2 of the clutch plate 27 and slides the clutch plate 27 in the direction of the arrow, so the connection between the manual tuning shaft and the cam plate 21 is interrupted. The sliding load on the cam plate 21 is much larger than the rotational load on the regulator 5, and there is no slight error.

Furthermore, when the operating rod 3 returns to sliding in the direction of arrow A, the clutch plate 27 also returns to the direction of arrow C, so that the roller 11 is moved again.
is in contact with the curved cam portion 27a-2.

Next, when the manual tuning shaft is rotated, the intermediate shaft 4 in Fig. 2 is rotated.
2 rotates and the roller 46. Since the drum 48 rotates sequentially and applies a displacing force to the cap 22 that is in pressure contact with the drum 48, the cam plate 21 is slightly slid from the position shown in FIG. 7, for example, in the direction of arrow C.

Therefore, since the rotating lever 24 in FIGS. 1A and 2 rotates counterclockwise, the core holding plate 35 slides in the direction of arrow B, and the core 34 enters the coil 32, 33 and is displaced.
Or select another desired station in the FM band.

Here, when reading out and selecting the first desired station, the seventh
Push the rubbing rod 3 in the figure again in the direction of arrow B and slide it.

Then, first, the roller 11 presses the curved cam part 27a-2 and slides the clutch plate 27 in the direction of the arrow against the coil spring 28, so that the pressing rod part 27C touches the other end 44 of the rotating arm 44. Press b.

Therefore, the rotating arm 44 in FIG. 2 rotates counterclockwise against the spring 45, and one end 44a moves upward, so that the roller 4
The cam plate 6 rotates upward about the joint with the intermediate shaft 42 and separates from the drum 48, and the cam plate 21 is disconnected from the manual tuning shaft and is in a state where it can slide under a low load.

Subsequently, when the operating rod 3 is pushed in, the left abutting portion 5b of the restrictor 5 that is being inhibited will contact the cam left side 2 of the V-shaped cam portion 21a of the cam plate 21.
The cam plate 21 is in contact with 1a-2 to apply a displacement force.
starts to slide easily in the direction of the arrow in the above-mentioned low-load slidable state, and finally the right contact portion 5a touches the cam right side 21.
a-1 and the state shown in FIG. 6 is reproduced.

Therefore, the cam plate 21 has returned to the initial position, and during this time, the rotation lever 24 returns to rotation in the clockwise direction, and the core holding plate 3
5 is in the direction of arrow A - the slide returns and the core 34 is connected to the coil 3
2 and 33, the first desired layer is read out and tuned.

Subsequently, upon release of the pushing force, the operating rod 3 slides back in the direction of arrow A and returns to the position shown in FIG. 7.

As described above, according to the push button tuner of the present invention, the member to be memorized has a power transmission rod-like portion near the clutch unit that floats above the bottom surface of the frame and extends in the sliding direction of the clutch unit. The body rolls and comes into frictional pressure contact with the upper surface of the rod-like part, and the roller supported on the frame rolls and frictionally contacts the lower surface of the rod-like part at a position offset from the above-mentioned pressure contact position, and the memorized member Since the rod-shaped portion is configured to slide while being slightly elastically deformed between the two press-contact positions, the pressure contact between the rotating body and the rod-shaped portion is maintained well due to the elastic deformation of the rod-shaped portion, and its power is maintained. Features include no slipping during transmission, improved power transmission efficiency, and improved tuning accuracy; and the memorized member itself is guided by the rollers and slides well, further improving tuning accuracy. has.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIGS. 1A and 1B are a plan view and a side view of an embodiment of the push-button tuner according to the present invention, and FIGS. 2 and 3 are perspective views of essential parts of the push-button tuner, respectively. 4 is an exploded perspective view of the operating rod of the push button tuner, and FIGS. 5 A and B are a partial plan view and longitudinal sectional view of the push button tuner in a state before the operating rod is pushed in, respectively. , FIG. 6, and FIG. 7 are partial plan views of the push button tuner when the operating rod is pushed in and when it is returned, respectively. 1... Push button tuner, 2... Frame lower plate, 2a... Bottom plate, 2d... Guide groove, 3... Operation rod, 4... Operation rod body,
4ce... Fixed rod portion, 4d... Elastic rod portion, 4h... Pivot hole, 4i, 12C...
・The spring holder has a convex portion, 5...regulator, 5a, 5b.
...Contact part, 6...Push button, 7, 8...
... Cover plate, 10 ... Stopper piece, 11
．． 23...roller, 12...piece, 14
......Coil spring, 21...Cam plate, 2
1 a... V-shaped cam part, 21a-1...
・V-shaped cam right side, 21 a-2... V-shaped cam left side, 22... Cap, 24... Rotating lever, 27... Clutch plate , 27 a...
...Cam part, 27a-2...Curved cam part,
29...μ tuning unit, 32, 33...
...Coil, 34...Core, 35...
Core holding plate, 40...Clutch unit, 42
...Intermediate shaft, 44...Rotating arm, 4
6...Roller, 48...Drum, 49
・・・・・・Frame top plate.

Claims (1)

[Scope of utility model registration request] The operating member supported on the frame is pushed and slid, and its regulator is brought into contact with the memorized member that can be slid in a direction perpendicular to the pushing direction to select a station. In a push-button tuner that performs tuning by sliding the memorized member through the rotation of a rotating body of a clutch unit supported by the clutch unit, the memorized member floats from the bottom surface of the frame near the clutch unit and extends in the orthogonal direction. The rotary body rolls and frictionally presses against the upper surface of the rod-like portion, and the roller supported on the frame is placed at a position offset from the pressure-contact position. A push button tuner configured to roll and frictionally press against the lower surface of a rod-like part, and the memorized member performs the sliding while the rod-like part is slightly elastically deformed between the surface pressure contact positions.