JPH044264Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mounting structure for a rotary knob used in audio equipment, VTRs, etc.

[Summary of the idea]

By providing a positioning structure for the rotary knob on the panel side, the present invention maintains a good appearance of the panel regardless of the misalignment between the center position of the rotary knob and the rotation axis of the variable resistor.

[Conventional technology]

Generally, the front panel of an audio device or the like is provided with various operation buttons, rotary knobs such as a variable resistor (VR), various displays, etc., and a design is applied to improve the appearance of the front panel.

The structure shown in FIG. 3 is known as a mounting structure for the rotary knob arranged on the front panel. This figure is a sectional view of a mounting structure for a rotary knob such as a VR, and the VR 30 is fixed to a board 31 such as a circuit. A rotation knob 32 is attached to the rotation shaft 30a of the VR. Also, panel 3
3 is provided with a hole having a diameter larger than the diameter of the rotary knob 32. The panel 33 is fixed to a chassis or the like, for example, after fixing the VR 30 to the substrate 31 and attaching the rotation knob 32 to the rotation shaft 30a.

Also, the center of the hole in the panel 33 and the VR
30 so as to coincide with the center of the rotation axis 30a,
The mounting position of the board 31 on the chassis etc., the above
The position of VR30 on the board 31, the panel 3
3, the mounting position to the chassis etc. is set.

[Problem that the invention attempts to solve]

In the conventional rotary knob mounting structure shown in FIG. 3, even though the center position of the panel 33 and the center position of the rotating shaft 30a of the VR 30 are designed to match, the tolerance of the parts and the accuracy during assembly , or deviations occur due to changes over time. Due to this misalignment, the hole in the panel 33 and the rotary knob 32
The gap between the two ends will be uneven, resulting in poor appearance.
Moreover, if the deviation becomes large and the rotary knob 32 comes into contact with the panel 33, it will cause operational problems.

Therefore, the present invention aims to solve the problems caused by such misalignment and realize a rotary knob mounting structure that maintains a good appearance.

[Means for solving problems]

In order to solve the above-mentioned problems and achieve the above object, the rotary knob mounting structure according to the present invention includes a rotary knob having a flange portion and a groove for fitting, and a rotary knob for protruding the rotary knob. A panel is provided on the board side around the hole with a position regulating part for regulating the position all around the outer periphery of the flange of the rotary knob in a direction perpendicular to the rotation axis, and the rotation of the parts fixed to the board. a fitting member having an arm portion that fits into the groove portion fixed to the shaft with a gap,
The position of the rotary knob is defined by the position regulating portion, and the rotation of the rotary knob is transmitted to the rotating shaft by fitting the fitting member and the groove portion with a gap.

[Effect]

The rotary knob attached according to the present invention is connected and supported to the rotation axis of the component with its position regulated by the position regulating portion provided on the panel. The gap between the fitting groove provided on the flange of the rotating knob and the arm provided on the fitting member fixed to the rotating shaft absorbs the deviation in the relative mounting position between the rotating knob and the rotating shaft. Ru.

Further, the rotational force of the rotary knob is transmitted to the rotary shaft through the relative fitting between a fitting groove provided on a flange of the rotary knob and an arm provided on a fitting member fixed to the rotary shaft.

〔Example〕

Hereinafter, the mounting structure of the rotary knob according to the present invention will be explained with reference to the drawings.

The rotary knob 2 constituting the present invention is disposed so that its tip side protrudes from a hole 1a for protruding the rotary knob bored in the panel 1, and the substrate 10, which is the inner surface of the panel 1, is disposed. The arrangement position with respect to the panel 1 is defined by the position regulating part 5 which is formed upright over the entire circumference of the hole 1a on the side where it is provided. That is, the position regulating portion 5 is provided so that the center of the hole 1a formed in the panel 1 and the center of the rotary knob 2 coincide with each other.

Further, the rotary knob 2 has a flange portion 11 on the base end side which has a larger diameter than the hole 1a bored in the panel 1, and this flange portion 11 and the position regulating portion 5
The rotary knob 2 is positioned by the inner surface of the panel 1, and the panel 1 is prevented from falling off to the outer side.

The rotary knob 2 is provided with a cavity 8, and a pair of grooves 7 are bored in the inner surface of the flange 11 in the radial direction. Furthermore, a VR 4 attached to a substrate 10 on which an electric circuit pattern and the like are formed is disposed inside the panel 1, which substantially coincides with the center of the rotary knob 2 supported by the panel 1. Therefore, the above VR4
The center of the rotating shaft 9 is substantially aligned with the center of the rotating knob 2.

A shaft fitting member 3 attached to the rotation shaft 9 is used to transmit rotational force between the rotation knob 2 and the rotation shaft 9 of the VR 4. A pair of arm portions 6 are provided on the outer circumferential side of the shaft fitting member 3 in a protruding manner. As shown in FIG. 2, the shaft fitting member 3 is fitted into the hollow part 8 of the rotary knob 5, and the pair of arm parts 6 are respectively engaged with the pair of groove parts 7 of the flange part 11. They are then attached to the rotating shaft 9.

When the rotary knob 2 is rotated in the direction of the arrow in FIG. 2 with the rotary knob 2 and the rotary shaft 9 of the VR 4 connected in this manner, this rotational force is applied to the groove 7 and the shaft fitting member. 3 is transmitted to the rotating shaft 9 by the relative engagement of the pair of arms 6, and the rotating operation of the VR 4 is performed.

By the way, the hollow part 8 and the groove part 7 of the rotary knob 2
The fitting member 5 and the arm portion 6 are formed to have a size such that a slight gap is created between them when they are fitted or engaged with each other. Therefore, depending on the tolerances of each part, the assembly accuracy during assembly, or changes over time, the mounting position of the VR 4 on the board 10 and the center of the hole 1a drilled in the panel 1,
That is, even if the center position of the rotary knob 2 is shifted, as long as this shift is within the range of the above-mentioned gap, it will not affect the transmission of rotational force, and the rotation operation by the rotary knob 2 will be performed normally. Moreover, regardless of the presence or absence of this deviation, the mounting position of the rotary knob 2 with respect to the panel 1 is defined by the position regulating portion 5, so that the deviation does not affect the appearance.

[Effect of idea]

As described above, in the present invention, the position of the rotary knob is determined by the position regulating part provided on the panel, and the position is fixed and supported with respect to the rotating shaft of the component, and the position of the rotary knob is fixed and supported by the position regulating part provided on the flange of the rotary knob. The gap between the fitting groove and the arm part of the fitting member fixed to the rotating shaft absorbs the deviation in the relative mounting position of the rotating knob and the rotating shaft, so the tolerance of each part and the gap during assembly are absorbed. Even if there is a deviation between the center position of the rotary knob and the center position of the rotation axis of the component due to assembly accuracy or aging, it will not affect the transmission of rotational force and will always maintain the position of the hole drilled in the panel. The center can be aligned with the center of the rotation knob. Therefore, the appearance of the panel can be maintained in good condition.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a rotary knob mounting structure according to the present invention, and FIG. 2 is a cross-sectional view thereof. FIG. 3 is a longitudinal sectional view of a conventional rotary knob mounting structure. DESCRIPTION OF SYMBOLS 1... Panel, 1a... Hole drilled in panel, 2... Rotating knob, 3... Shaft fitting member, 5...
...Position regulating part, 6...Arm part, 7...Groove part, 9...
Rotating shaft, 11...flange part.

Claims (1)

[Scope of Claim for Utility Model Registration] A rotary knob having a flange portion and a fitting groove, and a rotating shaft on the outer periphery of the flange portion of the rotary knob on the substrate side around the hole for protruding the rotary knob. It has a panel provided with a position regulating part that regulates the position all around the vertical direction, and an arm part that fits with a gap in the groove part fixed to the rotating shaft of the component fixed to the board. a fitting member, the position of the rotary knob is defined by the position regulating part, and the rotation of the rotary knob is transmitted to the rotating shaft by fitting the fitting member and the groove with a gap. A rotating knob mounting structure characterized by: