JPS6211056Y2 - - Google Patents

Description

[Detailed description of the invention] The invention relates to a push button tuner, in which when the operating rod is pushed in, the cam slider can slide by abutting against the cam slider via a pair of arms that can rotate arbitrarily. It is an object of the present invention to provide a push-button tuner that can increase the amount of power, improve the positioning accuracy of a cam slider, and improve the tuning accuracy.

In a conventional push button tuner, an operating rod having a regulator rotatable in a horizontal plane is pushed and slid in the pushing direction, and the regulator is placed on the V-shaped cam surface of a cam slider that is slidable in a direction perpendicular to the pushing direction. There is a device that performs tuning by displacing either the cam slider or the specifier by bringing their tips into contact with each other, but according to this, one of the V-shaped cam surfaces of the cam slider
If the pitch (the distance from peak to peak or valley to valley of the V-shape, which corresponds to the pitch of the adjacent operating lever) is P, the maximum sliding amount of the cam slider is half of that, P/2, which is a relatively small amount. It is limited,
If all stations were made to correspond to P/2, there was a drawback that the tuning accuracy of each individual station would be reduced.

Another conventional example is ``Tuner Apparatus'' disclosed in Japanese Patent Application Laid-Open No. 54-91101 which solves the above-mentioned drawbacks. According to this, the spring forked parts at the tips of a plurality of arms pivotally supported on the frame bottom plate fit into the plurality of cam holes of the cam slider in a spring-deformed manner, and when the operating rod is pushed in, the There is something that comes into contact with the arm and restricts the sliding position of the cam slider through this.Theoretically, there is no limit to the amount that the cam slider can slide and it can be made large, but on the other hand, the forked portions of the multiple arms are always in contact with each other. Because it is fitted into multiple cam holes in a spring-deformed manner, when the cam slider slides, the forked portions rotate at multiple locations with elastic friction relative to the cam holes, reducing the sliding load on the slider as a whole. is relatively large, which is a drawback in terms of operation.Also, since the position of the cam slider is regulated by the mere springiness of the fork, the cam slider may be displaced erroneously when an external impact is applied. There was a drawback that it was possible.

Therefore, the applicant proposed in the previous Utility Model Application No. 56-27000 "Push Button Tuner" that a pair of pivot arms are coaxially supported on the bottom plate of the frame for one of the positioners of one operating rod, and the positioner abuts on one end of each of the pair of arms to rotate the arms in opposite directions, and the other ends of the arms are pressed against both sides of a cam recess of the cam slider to obtain the position of the positioner or the cam slider, thereby eliminating the drawbacks associated with the springiness of the arms. However, this proposed a device in which the three members, the pair of arms and the operating rod, are stacked, making the device thicker, and the distance between the other ends of the pair of arms is relatively small, making the positioning accuracy of the cam slider unstable.

The present invention eliminates the above-mentioned problems, and each embodiment thereof will be described below with reference to the drawings.

FIG. 1 is a partial plan view of one embodiment of the push button tuner according to the present invention. In the figure, a frame 2 of a push button tuner 1 has front and rear side plates 2a, 2b, and a bottom plate 2c, and a plurality of pins 3 are arranged equally in the left-right direction in the figure at each position between a plurality of operating rods 7, which will be described later, in the center of the upper surface of the bottom plate 2c. Planted with Pituchi P. Also, 4 is a support plate, and the bottom plate 2c
It is erected and fixed on the upper rear surface of the holder, extending in the left-right direction in the figure.

Reference numeral 5 denotes a band-shaped cam slider, which has a plurality of cam recesses 5a at equal pitch P positions on its front surface, and has a bottom plate 2.
c It is supported on the upper surface so as to be slidable in the directions of arrows C and D under the guidance of a guide (not shown). The cam slider 5 is connected on the one hand to a manual operating shaft via a clutch mechanism, and on the other hand to a tuning mechanism.

6 (6 ₁ , 6 ₂ , ...) are a plurality of arms, each having a pivot hole 6 a and a pair of upwardly bent convex portions 6 on both sides thereof.
b, 6c, and one engaging convex portion 6d, the pin 3 is fitted into the pivot hole 6a of the bottom plate 2c, and the engaging convex portion 6d is loosely fitted into the corresponding cam recess 5a. It is attached to the pin 3 and is rotatable about the pin 3 as a fulcrum.

Reference numeral 7 denotes an operating rod, which is composed of an approximately sliding plate 8 and a push button plate 9. The sliding plate 8 has a pin 10 and an approximately semicircular regulating plate 11.
(having a pair of abutting portions 11a and 11b) is pivoted so as to be rotatable in a plane parallel to the lower surface of the sliding plate 8, and the restraining lever 12 is slidably mounted on the lower cut-and-raised portion 8a. It is pivotably supported in a plane perpendicular to the lower surface of the plate 8, and has a long hole 8b. Normally, one end 12a of the lower end 12a of the restraining lever 12 in FIG. The other end 12b which is in contact with and is located at the upper side in the figure is located below the lower surface of the regulating plate 11 and faces away from it.

The push button plate 9 has a pressing convex portion 9a, a pin 13, and a first
It has an integral push button 14 fitted to the lower end in the figure, and is attached to the lower surface of the sliding plate 8 by inserting the pin 13 into the long hole 8b.
It becomes relatively slidable in the directions of arrows A and B within the range in which it can move b.

As shown in FIG. 1, the operating rod 7 is slidable in the directions of arrows A and B by fitting a sliding plate 8 between the front plate 2a and the support plate 4 of the frame 2, and is supported by a spring 15 in the direction of arrow A. A predetermined stopper portion (not shown) is brought into contact with the front plate 2a and positioned. At this time, the pair of abutting portions 11a and 11b of the regulating plate 11 are spaced apart from and facing the convex portion 6c of the arm ₆₁ and the convex portion 6b of the arm ₆₂ in the directions of arrows A and B, respectively, and the other operating rods are also in the first position. As shown by the two-dot chain lines in the figure, they are attached to each other at equal pitches P.

Next, the operation of the push button tuner 1 having the above structure will be explained. First, the manual operation shaft is rotated to slide the cam slider 5 from the neutral position shown in FIG. 1 by an appropriate dimension in the direction of arrow D through the clutch mechanism to reach the position shown in FIG. Select. At this time, arm 6 (6 ₁ , 6
₂ ,...) are the respective cam recesses 5a of the cam slider 5.
It is pressed by the left side in the figure and rotates clockwise.

Here, press the operating rod 7 located at the position shown in Figure 1 and press the button 1.
4 is pushed and slid in the direction of arrow B against the spring 15, the push button plate 9 and the sliding plate 8 slide together as the convex portion 9a abuts against the one end 12a of the restraining lever 12. First, the left contact portion 11b of the regulation plate 11 contacts the convex portion 6b of the left arm ₆₂ . At this time, since the arm ₆₂ is stopped with its engaging convex portion 6d in contact with the left side of the corresponding cam recess 5a, the regulation plate 11 starts to rotate relatively counterclockwise, and the right abutting portion 11a is stopped. approaches the convex portion 6c of the right arm ₆₁ and presses it, causing the right arm ₆₁ to rotate slightly clockwise. Accordingly, the right arm ₆₁ changes from a state in which its engaging protrusion 6d abuts the left side of the corresponding cam recess 5a to a state in which it abuts and presses the right side of the corresponding cam recess 5a, and the regulation plate 12 also stops rotating at this position.

Therefore, when the push button 14 is pressed in succession, the sliding plate 8 cannot slide due to the contact of the regulation plate 11, the arms 6 ₁ and 6 ₂ and the cam slider 5 in succession, and the push button plate 9
The chisel slides, and the pressing protrusion 9 a is wedged between one end 12 a of the restraining lever 12 and the lower surface of the sliding plate 8 .
As a result, the restraining lever 12 rotates and the other end 12b presses the setting plate 11 against the underside of the sliding plate 8, preventing it from rotating. During this time, the pin 13 slides to the other end of the long hole 8b. Thus, the desired station has been stored, and the operating rod 7 is slid back in the direction of the arrow A.

Next, by operating the manual operation shaft, the cam slider 5
For example, if you slide the arm in the direction of arrow C to select another desired station, the arms 6 (6 ₁ , 6 ₂ ,
) are rotated counterclockwise as appropriate. When the operating rod 7 is pushed in again, the contact portion 11a of the regulation plate 12, which is being restrained in the state shown in _FIG.
The engaging protrusion 6d presses the right side of the corresponding cam recess _5a , causing the cam slider 5 to slide back in the direction of arrow D, and then rotates the arm 61 clockwise. The contact portion 11b comes into contact with the convex portion 6b of the left arm ₆₁ , and the engagement convex portion 6
d is brought into contact with the left side of the corresponding cam recess 5a, and as a result, the state shown in FIG. 2 is restored, and the first desired station is read out and selected.

According to the above operation, the dimensions of the cam recess 5a of the cam slider 5 and the pair of arms 6 ₁ , 6 ₂ and their relative positional dimensions are compared except for the corresponding parts of the cam recess 5 a and the engagement projection 6 d. Since this can be done freely and without restrictions, the sliding amount of the cam slider 5 can be theoretically set to a large amount without any limit, and the accuracy of channel selection can be improved. Further, when the operating rod 7 is finally pushed in, the engaging protrusions 6d of the pair of arms 6 ₁ and 6 ₂ are brought into contact with the right and left sides of the corresponding cam recesses 5a, which are opposite to each other, so that the cam slider 5 is moved by the arrow. Since two forces are applied in the D direction and the C direction, and the cam slider 5 is positioned at a position where the two forces balance each other, the repeatability of positioning the cam slider 5 is extremely high.

Also, since the pair of arms 6 ₁ and 6 ₂ are set on both sides of the operating rod 7 with a relatively large distance from each other, the cam slider 5 can be positioned on the right and left sides of the right cam recess 5a in FIG. The positioning accuracy can be further improved by regulating the positioning at two points spaced relatively apart from each other on the left side of the cam recess 5a.

Also, when positioning the cam slider 5, the regulation plate 12, the arm 6, and the cam recess 5a of the cam slider 5 are
The positioning accuracy of the cam slider 5 can be further improved because the cam sliders 5 and 5 contact each other in a rigid manner without using any elastic intermediate material. Further, since the arms 6 other than the arms 6 ₁ and 6 ₂ that are in operation are in an idle state, the sliding load on the cam slider 5 is small, and operability can be improved. Also, since the pair of arms 6 ₁ and 6 ₂ are respectively pivoted at different positions apart from the operating rod 7 of the bottom plate 2c, for example, the arms 6 ₁ and 6 ₂ may be pivoted in a stacked manner on the same pin. The thickness of the device can be made much thinner compared to a case where the arms 6 ₁ , 6 ₂ and the operating rod 7 are stacked in the thickness direction of the device to make the device thicker.

FIG. 3 shows another embodiment of the push button tuner of the present invention, in which the same parts as in FIG. 1 are given the same reference numerals and their explanation will be omitted. In the diagram, push button tuner 21
The operating rod 22 is composed of a sliding plate 23 and a push button plate 24, and the sliding plate 23 has a restraining spring 25 (a ring-shaped portion 25a, a pair of leg portions 25b, and each convex portion 25c) on its upper surface. ) is pivotally attached by a pin 26, and a regulation disk 27 is provided on the inner periphery of the ring-shaped portion 25a.
(having a pair of abutting pin parts 27a and 27b on the lower surface) are rotatably fitted, and the pair of pin parts 27
a and 27b protrude downward from the sliding plate 8 and face the convex portion 6c of the arm ₆₁ and the convex portion 6b of the arm ₆₂ in the directions of arrows A and B, respectively. The push button plate 24 has a restraining cam plate 28 (tapered surface 28a and recess 2) on its upper surface.
8b) is pivotally connected by a pin 29, and under normal conditions, each convex portion 25c of the restraining spring 25 is engaged with each concave portion 28b of the restraining cam plate 28, and at this time, the regulation disc 27 is rotatable. It is.

Therefore, the cam slider 5' in FIG. 3 slides from the neutral position in the direction of arrow C or D, and the arm 6
When ₁ , 6 and ₂ rotate from the neutral position, the operating rod 2
2, the regulation disc 27 itself finally rotates and its pair of pin parts 27a and 27b commonly abut on the convex part 6c of the arm ₆₁ and the convex part 6b of the arm ₆₂ , respectively. The arms 6 ₁ and 6 ₂ are rotated clockwise and counterclockwise, respectively, and pressed into contact with the right and left sides of the respective corresponding cam recesses 5a. Subsequently, when the push button plate 24, that is, the restraining cam plate 28 slides, each convex portion 25c of the restraining spring 25 is relatively aligned with the tapered surface 2.
8a and move toward the inner part of the tapered surface 28a while approaching each other. Accordingly, the pair of legs 25b also come close to each other, and the diameter of the ring-shaped portion 25a is reduced to tighten the regulation disk 27 and prevent it from rotating, completing the memorization of the desired station. The read operation may be performed in the same manner as in the above embodiment. This embodiment also has the same advantages as the above embodiment.

In each of the above embodiments, the hole 6a of the arm 6 is not limited to a circular hole, but may also be a triangular hole. Accordingly, when the operating rod is finally pushed in, the two sides of the triangle come into pressure contact with the pin 3, thereby improving the repeatability of positioning the arm 6. can be improved.

As described above, according to the push button tuner of the present invention, the regulator of the operating member has a pair of abutting portions, and the pair of arms are individually pivoted to different fulcrums of the frame, so that each arm is One end is arranged correspondingly to a different cam part of the cam slider,
The other ends of the pair of arms are brought into contact individually and simultaneously by the pair of contact parts of the regulation element, so that the arms rotate in opposite directions, and the one end of each arm presses against the different cam parts. Since the configuration is such that the cam slider is regulated and displaced in contact with each other, the three members, the pair of arms and the operating member, can be disposed at different positions on the plan view, and the thickness of the device can be reduced. Since the regulation is performed between two points with a relatively large distance corresponding to the dimension between the arms of The cam portions of the cam slider contact each other rigidly one after another without any intermediate spring-like material intervening, which improves positioning accuracy, and the cam slider is positioned by balancing two forces in opposite directions by a pair of arms. Therefore, it has features such as strong positioning force, improved positioning accuracy, and further improved channel selection accuracy.

[Brief explanation of the drawing]

1 and 2 are a partial plan view of one embodiment of the push-button tuner according to the present invention and a partial plan view of the essential parts of the push-button tuner in its operating state, and FIG. 3 is a partial plan view of another embodiment of the above-mentioned push-button tuner. It is a diagram. 1, 21...Push button tuner, 2...Frame,
5, 5'...Cam slider, 6 (6 ₁ , 6 ₂ ,
...)...Arm, 7, 22...Operation rod, 8, 23
...Sliding plate, 9, 24...Push button plate, 11...Regulation plate, 12...Suppression lever, 14...Push button, 25...
... Suppressing spring, 27... Regulation disk, 28... Suppressing cam plate.

Claims (1)

[Scope of utility model registration request] It has a rotatable regulator and a restraining member that restrains the rotatable regulator, and an operating member supported by a frame is pushed and slid, and the restraining regulator is brought into contact with an arm member pivotally supported by the frame and rotated. In a push-button tuner that can read and tune a desired station by restricting the sliding displacement of a cam slider that is slidable in a direction perpendicular to the pushing direction by rotational displacement of the arm member, the regulator has a pair of abutting portions. The arm member has a pair of arms individually pivoted on different fulcrums of the frame, and one end of each arm is respectively disposed corresponding to a different cam portion of the cam slider, The other ends of the cam sliders are individually and simultaneously abutted by the pair of abutting portions of the regulation element, so that they rotate in opposite directions, and the one ends of the cam sliders press against the different cam portions, thereby causing the cam slider to rotate. A push button tuner configured to perform regulated displacement.