JPS6110355Y2 - - Google Patents

Description

[Detailed explanation of the idea] This invention relates to an arm mechanism for a push-button tuner.

In a push-button tuner, channel selection is performed by activating a plurality of arm mechanisms equipped with push-buttons. The arm mechanism is provided with a fan-shaped regulation plate, and the rotation frame is locked to this regulation plate, and the rotation frame is rotated by the pushing motion of the arm, thereby rotating the core connected to the rotation frame. Tuning is achieved by advancing and retracting the coil. The amount of rotation of this rotary frame is determined by the inclination state of the fan-shaped regulating plate, and by making the regulating plate rotatable and fixing it as appropriate, it is possible to make each push button correspond to a desired frequency. It is configured so that it can be done.

Further, a clutch mechanism is provided between the rotary frame and the tuning knob, and a linking lever is connected to the clutch mechanism, so that when selecting a channel by pressing a button, the linking lever is tilted at the same time by the button operation, and the clutch is engaged. Configured to cut.

In such arm arm mechanisms, conventionally, the arm arm member is provided with a slide plate made of sheet metal or die-casting, and the presser spring is lifted up by this slide plate to fix the fan-shaped regulating plate. Further, when operating the push-button channel selection operation, the slide plate was used to push a link rod connected to the clutch mechanism to disengage the clutch.

However, in order to attach such a slide plate to the arm arm member, a process and other attachment parts are required, which complicates the overall structure of the arm arm, and the slide plate itself is relatively expensive. There were many disadvantages in terms of cost, etc.

The present invention aims to improve this point, and the push button is slidably provided on the armrest member, and the protrusion that lifts the presser spring and the connecting rod connected to the clutch mechanism are tilted. By integrally forming a projection piece on the push button, it is possible to provide a arm arm with a simple structure without the conventional slide plate.

An embodiment of the wrist arm mechanism according to the present invention will be described below with reference to the drawings. FIG. 1 is a plan view, and FIG. 2 is a side view. 1 is a cross arm member, 2 is a fan-shaped regulation plate, 3
4 is a presser spring, 4 is a push button, and 5 is an indirect plate. Further, A and B are the machine frames of the tuner, C is the crankshaft of the rotating frame connected to the core, and D is the link connected to the clutch mechanism.

The regulation plate 2 is rotatably attached to a protrusion 20 provided at approximately the center of the armrest member 2. A pair of left and right convex portions 30, 30 are formed at one end of the presser spring 3 to press against and fix the regulating plate 2. The presser spring 3 is a bolt/nut 31
The bolt/nut 31 is used as a fulcrum to tilt and press the convex portion 30 toward the regulating plate 2. The other end of the presser spring 3 extends in the direction of the push button 4, and that end forms a bent end 32 that is bent upward in FIG.

The indirect plate 5 has one end formed in a U-shape,
The end plate 50 is provided with a through hole, and one end of the cross arm member 1 is passed through the through hole to be attached to the member 1. The upper surface of the indirect plate 5 is
It is arranged so as to cover the protrusion 20 and the regulation plate 2, and prevents the regulation plate 2 from falling off from the protrusion 20. Further, the tip end portion 51 is bent upward in FIG. It gives a force in the direction.

The push button 4 is slidably attached to the other end of the armrest member 1. That is, by forming a rectangular hole 10 extending in the longitudinal direction in the armrest member 1 and passing the shaft 40 provided on the push button 4 through the hole 10, the push button 4 is prevented from falling off from the arm arm member 1. , its sliding range is limited. A protrusion 41 is integrally formed on the push button 4 in close contact with the armrest member 1 and extends in the direction of the presser spring 3. Projection 4
The distal end portion 410 of 1 is formed in a tapered shape, and the intermediate portion 411 following it is also formed in an inclined shape,
It is configured to be easily inserted under the bent end 32 of the presser spring 3. The push button 4 is further provided with a protrusion 42 that operates the clutch mechanism by pushing the link D.
are integrally formed. The projecting piece 42 is formed on the opposite side of the protrusion 41 with the armrest member 1 in between, and is formed so as not to come into contact with the member 1.

Next, the operation of this arm mechanism will be explained.

When fixing the fan-shaped regulating plate 2 at a position corresponding to a desired frequency, turn a tuning knob (not shown) of a tuner to set the crankshaft C at a position corresponding to the frequency. Next, when the push button 4 is pulled, the push button 4 slides against the armrest member 1, and the protrusion 41 is pulled out from under the presser spring 3. As a result, the tip of the presser spring 3 is lifted by the indirect plate 5, and the restriction of the regulating plate 2 by the convex portions 30, 30 is released, and the regulating plate 2 becomes rotatable. next,
When the push button 4 is pushed in, the arm bar member 1 is also pushed forward, and the regulating plate 2 is inclined in accordance with the position of the crankshaft C, thereby preventing the arm arm member 1 from being pushed forward. When the push button 4 is further pressed after the pushing of the member 1 has stopped, the push button 4 begins to slide against the member 1, and the protrusion 41 enters the lower side of the bent portion 32, lifting one end of the presser spring 3. . The presser spring 3 uses the bolt/nut 31 as a fulcrum to lower its convex portion 30 toward the regulation plate 2, and presses and fixes the regulation plate 2. In addition, during normal push button selection, when the push button 4 is pressed, the entire arm arm mechanism is pushed forward, and the protrusion 42 is also pushed forward, and the connecting rod D is pressed and tilted to operate the clutch mechanism. , disconnect crankshaft C from the tuning knob.

As explained above, according to the arm arm mechanism of this invention, the push button is made slidable relative to the arm arm member, and the protrusion that lifts the presser spring and the protrusion that operates the connecting rod are integrally attached to the push button. Because of this structure, it is possible to remove the slide plate that was conventionally necessary. Therefore, there is no need for parts for attaching the slide plate to the arm member, and there is no need for the attachment process, so the arm arm mechanism can be manufactured easily and inexpensively, and the weight can also be reduced by reducing the number of parts. In addition, the mechanism is simplified and the arm mechanism can be shortened in depth, making it ideal for short-depth type tuners.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the wrist arm mechanism according to the present invention, and FIG. 2 is a sectional view. DESCRIPTION OF SYMBOLS 1... Bracelet member, 2... Fan-shaped regulation plate, 3... Presser spring, 4... Push button, 5... Indirect plate, 20... Protrusion, 30... Convex part, 31... Bolt/nut,
32...Bent end, 40...Shaft, 41...Protrusion, 410...Tip part, 411...Middle part, 4
2... Projection piece, 50... End plate, 51... Tip.

Claims (1)

[Scope of utility model registration request] an arm metal member, a fan-shaped regulating plate rotatably provided on the arm arm member, a presser spring for crimping and fixing the fan-shaped regulating plate at one end thereof, and a presser spring slidably provided on one end of the arm arm member, A push button arm mechanism for a push button tuner, characterized in that it has a push button formed by integrally molding a protrusion for lifting the other end of the presser spring and a protrusion for actuating a connecting rod of a clutch mechanism.