JPS6214740Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present application relates to a tuning member used in a push-button tuner aimed at reducing the thickness of the tuner.

Conventionally, as shown in FIGS. 1 to 3, a frequency regulating plate 4 having a protruding shaft 2 in the middle and rotatably supported at one end by a pivot shaft 3 is provided on the surface of a arm arm 1 formed in a channel shape; A restraining piece 6 which is supported by a support shaft 5 so as to be tiltable and whose tilting action restrains the free end of the regulation plate 4; and an actuating section which slides when a push button 7 is pressed and imparts a tilting action to the restraining piece 6. A tuning member comprising a piece 8 is known, and this tuning member is generally supported so as to be movable back and forth on a device frame equipped with a slide plate 9 that is movable laterally and that interlocks with a variable tuning element. When the station member is pressed, the regulation plate 4 is inserted into the V-shaped window hole 10 provided in the slide plate 9.
The projecting shaft 2 is actuated to move the slide plate 9 laterally corresponding to the rotation angle of the regulating plate 4, and the variable tuning element is varied by the lateral movement. 1 in the diagram
Reference numeral 1 denotes an indirect plate having one end fixed to the pivot 3 and the other end interposed between the regulating plate 4 and the restraining piece 6.

By the way, in conventional channel selection members of this type, the regulation plate 4 is made of a band-shaped plate, and the restraining piece 6 is supported by the support shaft 5 at one position in the center of the width direction, so that the regulation plate 4 is If the restriction plate 4 is located near the line connecting the rotation axis 3 and the support point of the restraint piece 6 and is restrained, this is not a problem, but if the regulation plate 4 is restrained near the rotation limit position. For example, as shown in FIG. 3, when the free end of the regulating plate 4 is far away from the support shaft 5 of the restraining piece 6, the following defects occur.

That is, as is clear from FIG. 3, when the regulating plate 4 is in the restrained state, the tip of the restraining piece 6 is inclined in the width direction, and the restraining point by the restraining piece 6 is aligned with the regulating plate 4.
Offset toward the side edge. Therefore, as shown in Fig. 4, a horizontal component P' of the deterrent force P always acts on the regulating plate 4, and when external vibration is applied to the channel selection member, the horizontal component P' acts on the regulating plate 4. 4 may be rotated to some extent and the accuracy of channel selection may be impaired. In addition, when the support shaft 5 and the restraining part of the regulation plate 4 separate, the side part of the arm arm 1 is deformed to some extent as shown by the imaginary line in FIG. It is necessary to use a thick metal plate as the metal 1, which has the disadvantage of increasing length and weight and increasing cost.

Therefore, the present application aims to improve the above-mentioned defects, improve the selection accuracy and reduce the weight.The gist of the present application is to move the tilting fulcrum of the restraining piece in the direction of the width of the arm in the tuning member having the above-mentioned configuration. They are arranged side by side in at least two places.

That is, in the figure, 2 in the width direction of the restraining piece 6
The case is shown in which it is tiltably supported by support shafts 51, 51 at certain points. Note that in FIGS. 5 and 6, the same reference numerals as in FIGS. 1 and 2 indicate the same members.

However, according to the present application, since the restraining piece is supported at multiple points in its width direction, even if the regulating plate is restrained in a largely rotated state, as shown in FIG. Since it does not incline as much as compared to the horizontal force, there is no risk of harming the selection accuracy, and since the restraining part does not move far away from the support axis of the restraining piece, the armrest is There is no risk of deformation, and therefore a relatively thin metal plate can be used as the arm arm, making it possible to provide a lightweight and inexpensive product.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a conventional channel selection member, Fig. 2 is a cutaway side view of the same part, Fig. 3 is an enlarged sectional view in the same width direction, Fig. 4 is an explanatory diagram of component forces, and Fig. 5 is a side view of the same section. A plan view showing an embodiment of the present application, and FIG. 6 is an enlarged sectional view in the same width direction. In the figure, 1 is a cross arm, 2 is a protruding shaft, 4 is a frequency regulation plate,
51, 51 is a support shaft, 6 is a restraining piece, 7 is a push button, and 8 is an operating piece.

Claims (1)

[Scope of utility model registration request] A frequency regulating plate having one end rotatably pivoted to the arm arm, a restraining piece for restraining the regulating plate by a tilting action, and a tilting member for imparting a tilting action to the restraining piece by pressing a push button. In the channel selection member, the tilting fulcrums of the restraining piece are arranged in at least two positions in parallel in the width direction of the arm arm.