JPS645379Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a rotary operation knob device in which the rotary operation knob is pressed with the pad of a finger to eliminate the rattling that is felt when rotating the knob.

Conventionally, a rotary operation knob is supported by fitting its rotation shaft into a bearing portion of a chassis (base body). Various efforts have been made to reduce play between the rotation shaft and the shaft hole.

However, in the case of a general rotary operation knob device, which is rotated by grasping the side of the rotary operation knob with your fingers, even if there is a slight wobble, you hardly feel it with your fingers during rotation operation, but the rotation operation knob In the case of a so-called belly-pat type rotary operation knob device, in which the side of the rotary operation knob is pressed with the pad of the finger and the force is transferred along the side of the rotation operation knob to perform rotation operation, even if there is a slight play, the press operation will not be performed. Sometimes it is easy to feel with your fingers and has poor operability. Therefore, it is desired to completely remove the play between the rotation shaft and the shaft hole, but completely removing the play requires high processing precision and becomes expensive.

This invention was made in view of the above points, and has a structure in which the rotating shaft is biased in the direction in which the rotational operation knob is biased when the rotational operation knob is pressed by the urging force of the driven body, and the rotational operation knob is pressed. To provide a rotary operation knob device in which rattling is not felt during rotation operation. This invention will be explained below based on the drawings.

FIGS. 1a and 1b are a partial front view and a sectional view taken along the line X--X of an embodiment in which this invention is applied to a tuning device, and the outer casing is omitted in FIG. 1a. In FIG. 1, 1 is a base made of, for example, synthetic resin;
A shaft hole 2 serving as a bearing portion and a stopper piece 3 are provided. Reference numeral 4 denotes a rotation shaft that fits into the shaft hole 2, and has a winding portion 5 serving as a biased portion at one end, a serration 6 at the other end, and a stopper piece 3.
They are facing each other with a gap between them. 7 is the rotation axis 4
8, 9, 10 are pulleys pivotally supported on the base 1; 11 is the winding portion 5; the pulleys 8, 9, 10;
and a string as a driven body, which is wound around a dial drum 12 fixed to a variable capacitor (not shown) and whose both ends are locked to the dial drum 12 with springs 13.
An indicator 14 is attached, and the beginning and end of the string 11 wound around the winding part 5 are lower than the position of the string 11 hooked around the pulleys 8 and 9 (see FIG. 1a). Reference numeral 15 denotes an outer casing, and a hole 16 through which a part of the rotation operation knob 7 protrudes outside the outer casing 15 is provided.

When the rotation operation knob device is configured as described above, even if there is play in the shaft hole 2 and the rotation shaft 4, the winding portion 5 is moved as shown by the arrow A in FIG. 1b due to the tension of the string 11. direction. As a result, the serration 6 side of the rotary shaft 4 is biased in the direction of arrow B using the point P of the shaft hole 2 as a fulcrum. Therefore, in this state, press the side surface of the rotary operation knob 7 protruding from the hole 16 of the outer casing 15 downward with the pad of your finger F as shown in Fig. When moved and rotated, the rotation operation knob 7 is originally biased in the direction of arrow B, that is, biased in the direction biased by the clearance of the bearing part, when the rotation operation knob 7 moves between the shaft hole 2 and the rotation shaft 4. Since there is no backlash, the rotary operation knob 7 can be operated without feeling any backlash. Further, since the winding portion 5 and the rotation operation knob 7 are disposed on opposite sides of the shaft hole 2 as a fulcrum, the shaft mounting mechanism is stable and rattling is further eliminated.

In addition, if there is too much play between the shaft hole 2 and the rotating shaft 4 and the rotation operation knob 7 is tilted more than necessary, a stopper piece 3 is provided so that the rotating shaft 4 comes into contact with the stopper piece 3 and the tilt is restricted. It is also possible to do so.

FIG. 2 is a partial front view similar to FIG. 1a showing another embodiment in which this invention is applied to a tuning device;
The difference from the embodiment shown in the figure is that the pulley 9 is omitted;
This is the point where the winding portion 5 is urged in the direction of arrow A by changing the position of the pulley 8 as shown.

FIGS. 3a and 3b are a partial front view and a sectional view taken along the line Y--Y of still another embodiment in which this invention is applied to a tuning device, and the outer casing is omitted in FIG. 3a.

What is different from the embodiment shown in FIGS. 1 and 2 is that a rotation control knob 7 is provided on the same side as the winding part 5, and a pulley 8, It is set higher than the string 11 hanging from 9.
Therefore, the winding part 5 and the rotation operation knob 7 are
Since it is biased in the direction of arrow C shown in Fig. a, any looseness between the shaft hole 2 and the rotation shaft 4 is removed as described above, and the rotation operation knob 7 rotates the bearing part using the shaft hole 2 as a fulcrum. Since it is biased in the biased direction by the clearance, no rattling will be felt when the rotary operation knob 7 is pressed.

FIGS. 4a and 4b are a cross-sectional view and a front view of a driven body showing still another embodiment adapted to the gear meshing mechanism of this invention.

In FIG. 4, reference numeral 17 denotes a rotation shaft that fits into the shaft hole 2. A gear 18 serving as a biased portion is formed at one end, a serration 19 is formed at the other end, and a rotation operation knob 7 is formed on the serration 19 side. Fitted. 21 is a driven body pivotally supported in the shaft hole 20 of the base body 1;
Gear 22 and elastic rib 23 that mesh with gear 18
It is integrally molded from synthetic resin or the like. The spacing between the shaft holes 2 and 20 is set so that the gear 22 always presses the gear 18 with the elasticity of the elastic ribs 23.

When the rotary operation knob device is configured as described above, both gears 18 and 22 are elastically engaged with each other, so that the gear 18 is urged in the direction of arrow D by the elastic force of the elastic rib 23. As a result, the rotary operation knob 7 is biased in the direction of the arrow E, and as described above, the rotary operation knob 7 can be pressed without feeling any rattling.

In the case of this embodiment, a winding portion is provided at the end of the driven body 21 on the side opposite to the side where the gear 22 is located,
When the gear 22 is meshed with another gear, it can also be applied to a tuning device or other rotational transmission mechanism.

As explained above, in the rotary operation knob device of this invention, the rotating shaft is biased by the biasing force of the driven body, and the rotary operation knob is biased by the clearance of the bearing with the bearing as a fulcrum. Since it is configured so that it is biased in the direction, the pivoting mechanism is stable and the rotary operation knob can be operated without feeling any discomfort with the pads of the fingers when the rotation operation knob is pressed. Also, since the configuration is easy,
It has advantages such as being inexpensive.

[Brief explanation of the drawing]

Figures 1a and 1b are a partial front view and a sectional view taken along line X-X of an embodiment in which this invention is applied to a tuning device;
Figure 2 is a partial front view of another embodiment in which this invention is applied to a tuning device, and Figures 3a and 3b are partial front views and Y-Y lines of still another embodiment in which this invention is applied to a tuning device. FIGS. 4A and 4B are a sectional view and a front view of a driven body showing still another embodiment in which this invention is applied to a gear meshing mechanism. In the figure, 1 is the base, 2 and 20 are shaft holes, 4 and 17 are rotating shafts, 5 is a winding part, 8 and 9 are pulleys, 7 is a rotation operation knob, 15 is an outer casing, 16 is a hole, 18,2
2 is a gear, and 23 is an elastic rib.

Claims (1)

[Scope of utility model registration request] In the rotary operation knob device, the portion of the rotary operation knob that partially protrudes from the outer casing is pressed from a direction substantially perpendicular to the rotation axis of the rotary operation knob, which rotates integrally with the rotary operation knob. A rotating shaft, a bearing portion that supports the rotating shaft,
A biased portion provided on the rotating shaft; a driven body coupled to the biased portion to transmit rotational force; and a biasing force applied by the driven body to the biased portion. A rotational operation knob device, characterized in that the rotational operation knob is applied with the bearing portion as a fulcrum, and the rotational operation knob is biased in a direction biased by a clearance of the bearing portion during rotational operation. .