JP2002181062A - Rotating knob - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotating knob sortable for every material and easy to be recycled in the rotating knob formed by a plurality of materials. SOLUTION: This rotating knob held by a shaft provided rotatably on a volume is provided with a fitting part press-fitted with the shaft, a knob cap part for inserting the fitting part and a coupling part for coupling the fitting part and the knob cap part. The fitting part has a collar part, a projecting part which projects on a center shaft of the collar part and is provided with a press-fitting hole for press-fitting the shaft, and a groove part for coupling and a rotation preventing part on an outer periphery of the projecting part. The knob cap part has a recessed part fitted into the collar part and a rotation preventing hole fitted into the rotation preventing part provided on a bottom surface of the recessed part. The coupling part is made to have a through-hole for inserting the projecting part and a projecting part fitted into the groove part for coupling on an inner wall of the through-hole.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary knob held on a shaft rotatably provided on a volume.

[0002]

2. Description of the Related Art FIG. 3 is a schematic diagram showing the assembly of a conventional rotary knob and a volume. Volume part 4
Is fixed, for example, to the panel 2 on the front surface of the amplifier. The volume portion 4 includes a rotatable shaft 1 having a D-shaped cross section. The rotation of the shaft 1 changes the resistance value of a variable resistor inside the volume portion 4 and is input to a device (not shown). Signal or the level of the signal output from the device increases or decreases. Shaft 1 is panel 2
At the surface of the panel 5 from the hole 21 provided in the panel 5.

The rotary knob 3 includes a cylindrical knob cap 31 made of aluminum and a fitting portion 32 formed of a synthetic resin such as ABS inserted into the knob cap 31 and adhered with an adhesive.

[0004] The fitting portion 32 has a D-shaped press-fit hole 33 for press-fitting the shaft 1 at the center thereof, and the rotary knob 3 is held by the shaft 1 by press-fitting the shaft 1 of the volume portion 4. State.

Therefore, the shaft 1 is turned by turning the turning knob 3. By this rotation, for example, the level of a signal input to a device (not shown) or a signal output from the device can be increased or decreased.

[0006]

In the above-mentioned rotary knob, the fitting portion is adhered to the knob cap with an adhesive at the time of assembling, so that it is difficult to disassemble each material when discarding. For this reason, there is a problem that it becomes an industrial waste made of aluminum and a synthetic resin, it takes time and effort to recycle, and the cost for recycling increases.

The present invention makes it possible to assemble the rotary knob without using an adhesive, and when the rotary knob is discarded, the knob cap and the fitting portion can be easily separated to separate each material. The purpose is to facilitate recycling and prevent industrial waste.

[0008]

According to a first aspect of the present invention, there is provided a rotary knob held by a shaft rotatably provided on a volume. A fitting portion for press-fitting the shaft, a knob cap portion for inserting the fitting portion, and a joining portion for joining the fitting portion and the knob cap portion, wherein the fitting portion has a flange portion and the flange A protrusion having a press-fitting hole protruding above the central axis of the portion and having a press-fitting hole for press-fitting the shaft, and a coupling groove and a rotation preventing portion provided on the outer periphery of the protrusion; and the knob cap is fitted to the flange. A concave portion and a rotation preventing hole fitted to the rotation preventing portion provided on the bottom surface of the concave portion, wherein the connecting portion is fitted with the through groove for inserting the protruding portion and the connecting groove portion on an inner wall of the through hole. It is characterized in that it has a convex portion.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a rotary knob according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a schematic configuration of the rotary knob of the present embodiment, and FIG. 2 is a cross-sectional view showing a cross section when the rotary knob of the present embodiment is assembled.

In FIG. 1, the front panel 2 has a hole 61 fixed to the amplifying device 6. The volume part 4 includes a rotatable shaft 1 having a D-shaped cross section.
The rotation of the shaft 1 changes the resistance value of the variable resistor inside the volume unit 4, and the level of a signal input to the amplifier 6 or a signal output from the device increases or decreases. The volume portion 4 is fixed to the back surface of the panel 2 so that the shaft 1 projects from the hole 61 to the surface of the panel 2.

In FIG. 2, the rotary knob 5 is
1, a knob cap 52 and a connecting portion 53.

The fitting portion 51 has a disc-shaped flange portion 51e at the end.
And a cylindrical protruding portion 51b protruding on the central axis of the flange portion 51e. The protruding portion 51b has a press-fitting hole 51a having a D-shaped cross section for press-fitting the shaft 1 therein.
The outer circumference of 1b has a coupling groove 51c. Further, a quadrilateral rotation preventing portion 51d is provided near the flange portion 51e on the outer periphery of the protruding portion 51b. The fitting portion 51 is molded with a synthetic resin such as an ABS resin.

The knob cap 52 is made of aluminum having a cylindrical shape.
e, a concave portion 52b that fits with the rotation preventing portion 51d is provided at the center of the bottom surface of the concave portion 52b. The knob cap 52 is inserted and fitted from behind the fitting portion 51.

The connecting portion 53 has an annular shape having a through hole 53a inserted into the projecting portion 51b. The inner peripheral surface of the through hole 53a is provided with a convex portion 53b that fits into the coupling groove portion 51c provided on the outer periphery of the protruding portion 51b. Through hole 5
3a is inserted into the protruding portion 51b, and when the convex portion 53b is fitted into the coupling groove portion 51c, the end face 53c of the coupling portion 53 is
The knob cap 52 is brought into contact with the back surface 52c of 2b, and is clamped between the end surface 53c of the connecting portion 53 and the flange 51e. Coupling part 53
Is molded of the same synthetic resin as the fitting portion 51 such as ABS resin.

According to this embodiment, since the fitting knob 51, the knob cap 52 and the connecting portion 53 are assembled to form the rotary knob 5, it is not necessary to fix the rotary knob 5 with an adhesive as in the prior art. .

Further, since the fitting portion 51 and the knob cap 52 can be separated by removing the connecting portion 53, it is easy to separate the material and recycle it. In addition, the fitting portion 51 and the coupling portion 53 can be made of a synthetic resin that is difficult to adhere with an adhesive.

Since the knob cap 52 is made of aluminum, it can be recycled.

[0018]

According to the present invention, since the knob cap and the fitting portion can be separated by removing the connecting portion, it is possible to provide a rotary knob which can be separated for each material to facilitate recycling. .

[Brief description of the drawings]

FIG. 1 is a perspective view showing a schematic configuration of a rotary knob according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the assembly of the rotary knob according to the embodiment.

FIG. 3 is a schematic configuration diagram of a rotary knob showing a conventional example.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 shaft 2 panel 21 hole 3 rotating knob 31 knob cap 32 fitting portion 33 press-in hole 4 volume portion 5 rotating knob 51 fitting portion 51a press-in hole 51b protrusion 51c coupling groove 51d rotation preventing portion 51e flange 52 knob Cap 52a Anti-rotation hole 52b Concave portion 53 Coupling portion 53a Through hole 53b Convex portion 6 Amplifier 61 hole

Claims (1)

[Claims] 1. A rotating knob held on a shaft rotatably provided on a volume, wherein the rotating knob comprises: a fitting portion for press-fitting the shaft;
A knob cap portion for inserting the fitting portion; and a coupling portion for coupling the fitting portion and the knob cap portion, wherein the fitting portion projects the flange and a shaft protruding on a central axis of the flange portion. A protrusion provided with a press-fitting hole for press-fitting, and a coupling groove and a rotation preventing portion provided on an outer periphery of the protrusion; and the knob cap is provided on a bottom surface of the recess and a recess fitted to the flange. It has a rotation prevention hole which fits with the rotation prevention part, and the coupling part has a through-hole for inserting the protruding part and a convex part which fits with the groove for coupling on the inner wall of the through-hole. Rotating knob.