JPS6121868Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to the invention of a arm arm mechanism for a push-button tuner, which has a small number of parts and is easy to manufacture and assemble.
An appropriate channel selection tuning effect can be obtained in an arm mechanism that is designed to reduce cost.

In a push-button tuner, it is essential to use a push-button arm in order to tune into the channel with one touch by pressing the button, and various types of push-button arm have been proposed in the past. However, these conventional devices have a disadvantage in that they have a large number of component parts and require a large number of man-hours to manufacture and assemble.
That is, the push button attached to each arm is fixed and restrained by the pressing piece of the frequency regulation plate, and in order to release it, it is necessary to slide the button with respect to the arm. A cam part is provided which is pushed into the base end of the press piece, and the base end side of the press piece whose middle part is fixed to the arm piece is pushed up by the above-described sliding operation on the arm piece. The frequency regulation plate is restrained and fixed on the tip side of the
It is necessary to release the restrained state by pulling out the cam part, and if the push button is not stably attached to the arm arm so that it will not separate at least when the push button is in the locked-out state, the above-mentioned It goes without saying that one-touch channel selection operations like this cannot be performed accurately;
Since the push button and the armrest must be mounted in a suitable relationship to enable the above-mentioned sliding operation, the structure for connecting and fixing the push button to the armrest is usually quite complicated. A bullet piece with high elasticity is attached to the cover arm, and the bullet piece and the base end of the arm are both inserted into the push button, one is fixed to the push button by bending, etc., and the other is compressed inside the push button. Because of this, a large number of parts are required, and a complicated engagement structure is required inside the push button.In assembly, it is necessary to use a strong member in the narrow cavity or opening of the push button. The disadvantages of this type of push button arm, in that the number of man-hours required is large and five or more pieces are required, are the cause of a large increase in the cost of the push button tuner as a whole. Therefore, the inventor of the present invention researched to eliminate the disadvantages of the conventional bag as described above, and added a push-up cam portion 21 for operating the push piece 3 to the arm arm 1 as shown in FIGS. 1 and 2. A guide hole 14 is integrally protruded and formed at the base end of the arm 1 for regulating the slide stroke of the push button 2 with respect to the arm 1, and the push-up cam portion 21
It was proposed that the connecting pin 6 inserted into the guide hole 14 be engaged with the connecting pin 6 inserted therein. (Utility Model Registration Application No. 80266 of 1982). That is, according to this prior application, the work of attaching the push button to the arm arm is greatly simplified compared to the conventional general method as described above, and the sliding operation of the push button with respect to the arm arm can be performed appropriately. It has been found that the above-mentioned connecting pin 14 is required, and that it is not necessarily easy to properly drive the connecting pin 14 adjacent to the stepped portion of the push button 2.

The present invention has been devised after further study in view of this point, and the embodiments thereof are explained as shown in the attached drawings. Figures 3 to 6 show the first embodiment of the present invention. In other words, a connector 7 is inserted into the middle part of the push button arm 1, and the tip side of the pressing piece 3 is inserted by the connector 7, and an engaging element 8 screwed into the connector 7 is inserted. A protrusion 3a formed at the center of the tip side of the pressing piece 3 is exposed to the lower surface of the pressing piece 3, and the pressing piece 3 has a bent step 32 in the middle and a receiving hole 2 for the push button 2 in the arm arm 1.
Another receiving hole 2b in the partition wall 2c of the push button 2 is inserted into the engagement hole 31 formed on the proximal end side to be inserted into the button a.
The engaging protrusion 20 formed toward the push button 2 is made to engage accurately at least when locking out by the operating stroke l as shown in FIG. The formed push-up cam portion 21 faces the bottom surface of the base end side of the push piece 3. In addition, treading parts are provided oppositely on both sides of the tip side of the protrusion 3a of the pressing piece 3, and these treading parts are separately provided on the protrusion of the stepped pivot 11 provided on the tip side of the arm arm 1. ,
The push-up cam portion 21 faces the circumferential side of the frequency regulating plate 4 which is rotatably supported, and when the push button 2 is pressed as described above, the push-up cam portion 21 is moved between the push piece 3 and the armrest 1 as shown in FIG. By being pushed in as shown in the figure, the frequency regulating plate 4 is pressed as shown in the figure. Insert the tip of
In the receiving hole formed in this premature tightening prevention bullet piece 5, the protrusion of the pivot 11 is received, and the proximal end thereof is folded back and engaged with the back surface of the cross arm 1 as a bent part. Insert armrest 1 into the formed through hole.
The distal end guide portion 17 is inserted therethrough.

Figures 7 and below show another embodiment of the invention, which is similar in general construction to that of Figures 3 to 6 above, but with a pressing piece as described above. A slanted guide portion 30 is formed at the base end of 3, and the engaging protrusion 20 has an slanted surface 20a parallel to the slanted guide portion 30.
is formed toward the opening of the receiving hole 2b.

According to the present invention as described above, the engaging protrusion 20 protrudes from the partition wall 2c of the push button 2 at a position close to the push-up cam part 21, and the engaging hole formed at the proximal end of the pressing piece 3. 31, the push button 2 and the pressing piece 3 are properly engaged in the locked out state, and the pressing piece 3 is fixed to the armrest 1 by the connecting piece 7, so that the whole can be properly assembled. Yes, but the assembly operation is simply using the pressing piece 3.
This can be easily achieved by simply inserting the proximal end of the push button into the receiving hole 2b, and there is no need for a strong elastic piece like in the past. It has the advantage that a preferable assembly can be obtained without bending, and since there is no need for driving operations such as connecting pins, manufacturing and assembling is extremely easy, and the number of parts can be reduced to provide a push button mechanism at low cost. This is a highly effective idea in terms of practical production.

According to the embodiments shown in FIGS. 7 to 11 of the accompanying drawings, the inclined guide portion 30 is
The engaging protrusion 20 and the engaging hole 31 can be easily engaged with each other by moving along the inclined surface 20a, and the assembly operation can be further facilitated.

[Brief explanation of the drawing]

The drawings show the technical contents of the present invention, in which Figure 1 is a partially cutaway side view of the prior art by the inventor, Figure 2 is a partially cutaway plan view thereof, and Figures 3-6.
The figures show one embodiment of the present invention, FIG. 3 is a side view of the lock-out state, FIG. 4 is a cross-sectional plan view thereof, and FIG. 5 is a side view of the lock-in state.
FIG. 6 is a cross-sectional plan view of the device, and FIG. 7 and subsequent figures show another embodiment of the present invention. FIG. 7 is a partially cutaway plan view of the locked-out state, and FIG. FIG. 9 is a partial cross-sectional plan view showing the assembly operation state, FIG. 10 is a partial cut-away side view of the locked-in state, and FIG. 11 is a cross-sectional plan view thereof. In these drawings, 1 is an arm arm, 2 is a push button, 2a and 2b are receiving holes thereof, 2c is a partition wall, 3 is a pressing piece, 4 is a frequency regulating member, 5 is a premature tightening prevention piece, and 7 is a piece for preventing premature tightening. In the connector, 20 is an engaging protrusion, 21 is a push-up cam portion, 30 is an inclined guide portion, 31 is an engagement hole, and 32 is a bent step.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A push button formed with a pressing cam portion for operating a pressing piece that restrains a frequency regulating member attached to the arm arm is inserted into the base end of the arm arm. The push button is characterized in that an engaging protrusion is formed in the receiving hole of the push button to engage with an engagement hole formed at the base end of the pressing piece to define the lockout stroke of the push button. arm mechanism in a push-button tuner. 2. The arm mechanism for a push button tuner according to claim 1, wherein an inclined guide portion is formed on the proximal end side of the engaging hole of the pressing piece, and an inclined surface is formed on the top end of the engaging portion.