JPH10107462A - Positioning structure for cabinet and operating knob - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a positioning structure, which enables positioning of an operating knob at a predetermined position of a knob positioning hole, made in a cabinet by accurately positioning the cabinet and the operating knob disposed outside the cabinet. SOLUTION: The positioning structure includes a variable resistor element 6, having an operating shaft 8 and disposed within a device, an operating knob 10 supported on the operating shaft 8 of the element 6, a cabinet having a knob mounting hole 2 made therein for mounting of the knob 10 on the cabinet, and a mounting plate 3 provided inside of the cabinet and provided therein with a mounting hole 4 for mounting of the resistor element 6 at a position, associated with the knob mounting hole 2. The resistor element 6 is mounted to the mounting plate 3 in such a condition that the shaft 8 is inserted through the mounting hole 4 and knob mounting hole 3, from the inside of the device. The mounting hole 4 is provided at its peripheral edge with positioning projections 5, 5 and 5, and the positioning projections and knob mounting hole are engaged for their positionings.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a positioning structure for a cabinet and an operation knob. More specifically, the present invention relates to a technique for accurately positioning a cabinet and an operation knob arranged on the outer surface side of the cabinet, and disposing the operation knob at a predetermined position of a knob arrangement hole formed in the cabinet. .

[0002]

2. Description of the Related Art Conventionally, operation knobs have been arranged as follows for equipment, for example, cabinets of audio equipment (see FIG. 6).

[0003] A cabinet a of an audio equipment is composed of a box-shaped front side b opened rearward and a box-shaped rear side c opened frontward, and a front wall of the front side b has a knob. An arrangement hole d is formed.

[0004] The mounting plate e disposed in the cabinet a has a U-shaped vertical cross-sectional shape with an open rearward, and the outer shape has a size corresponding to the inner shape of the front side b of the cabinet a. A mounting hole f is formed at a position corresponding to the knob arrangement hole d formed on the front side b. And the mounting plate e
Are arranged in the front side part b so as to be fitted from the rear side, and are separated from the front wall of the front side part b.

The variable resistance element g, for example, a rotary volume has a main part h and an operation shaft i extending forward from the main part h, and the operation axis i is attached to the mounting hole f of the mounting plate e and the cabinet a. The variable resistance element g is attached to the mounting plate e in a state in which the knob placement hole d is inserted from the rear side and its tip slightly protrudes from the knob placement hole d.

The operation knob j is formed in a columnar shape that is short in the axial direction, the outer diameter is slightly smaller than the inner diameter of the knob arrangement hole d, and a mounting recess k that opens rearward is formed on the rear surface. The operation knob j is arranged on the front side of the cabinet a with the operation shaft i of the variable resistance element g fitted in the mounting recess k and the rear end positioned in the knob arrangement hole d.

[0007]

As described above, in the conventional audio equipment, these positions are determined by the inner shape of the front side b of the cabinet a and the outer shape of the mounting plate e. Knob arrangement hole d of cabinet a
The positional relationship between the mounting plate e and the mounting hole f is determined by the shapes of the cabinet a and the mounting plate e.

However, the center of the knob arrangement hole d and that of the mounting hole f tend to shift due to dimensional tolerances of the cabinet a and the mounting plate e, and the operation axis i of the variable resistance element g mounted on the mounting plate e is moved to the cabinet a As shown in FIG. 7, the operation knob j externally fitted to the operation shaft i may not be located at the center of the knob arrangement hole d, and may be arranged eccentrically with respect to the knob arrangement hole d. Occur.

Therefore, the positioning structure of the cabinet and the operation knob of the present invention overcomes the above-mentioned problems, and accurately positions the cabinet and the operation knob disposed on the outer surface side of the cabinet to form the cabinet. It is an object of the present invention to arrange the operation knob at a predetermined position of the knob arrangement hole.

[0010]

In order to solve the above-mentioned problems, a cabinet and a positioning structure of an operation knob according to the present invention are provided with a variable resistance element having an operation shaft and arranged in a device,
An operation knob supported by the operation shaft of the variable resistance element, a cabinet having a knob arrangement hole in which the operation knob is arranged, and a knob arranged on the inner surface side of the cabinet and corresponding to the knob arrangement hole. A mounting plate in which a mounting hole for mounting the variable resistance element is formed at a position, and the variable resistance element is mounted on the mounting plate in a state where an operation shaft is inserted into the mounting hole and the knob arrangement hole from inside the device. The positioning projection is formed on the periphery of the mounting hole, and the positioning projection is engaged with the knob arrangement hole to perform positioning.

Therefore, according to the positioning structure of the cabinet and the operation knob of the present invention, the center of the knob arrangement hole of the cabinet coincides with that of the mounting hole of the mounting plate.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a cabinet and an operation knob according to an embodiment of the present invention;

In the illustrated embodiment, the present invention is applied to a cabinet for a stationary audio equipment such as an amplifier or a tuner and a positioning structure of an operation knob which is a rotary knob for changing a volume. .

The cabinet of the audio equipment comprises a box-shaped housing (not shown) opened forward and a decorative panel 1 covering the opening surface. The decorative panel 1 is formed by, for example, extrusion molding of aluminum and has a horizontally long shape. Is formed in a slightly thicker rectangular shape. And a knob arrangement hole 2 is formed in the decorative panel 1.

A mounting plate 3 made of a metal material such as iron is disposed on the rear side of the decorative panel 1, that is, in the cabinet. The mounting plate 3 has a rectangular shape and a small thickness. A mounting hole 4 is formed in the mounting plate 3 at a position corresponding to the knob arrangement hole 2, and positioning projections 5, 5, 5 protruding toward the decorative panel 1 are integrally formed around the mounting hole 4. It is provided in.

The positioning projections 5, 5, 5 are formed in a small columnar shape so that the distance between them is equal, that is, the line connecting these positioning projections 5, 5, 5 forms an equilateral triangle when viewed from the front. It is provided in. The positioning projections 5, 5, 5 are provided so that the distance from the center of the mounting hole 4 is equal, and the distance from the center of the mounting hole 4 to the outer edge is the knob arrangement hole 2 of the decorative panel 1. To match the radius.

The variable resistance element 6 is a rotary type volume, and is provided on the outer periphery of a main part 7, an operation shaft (rotation axis) 8 extending forward from the main part 7, and a base end of the operation shaft 8. A threaded portion 9 having a thread groove formed therein, and the operation shaft 8 is inserted through the threaded portion 9. The volume is changed by rotating the operation shaft 8. The outer diameter of the screw portion 9 is substantially the same as the inner diameter of the mounting hole 4 of the mounting plate 3.

The operation knob 10 has a cylindrical shape that is short in the axial direction, and has a mounting recess 11 that is opened rearward on the rear surface. The outer diameter of the operation knob 10 is the decorative panel 1 described above.
Is formed slightly smaller than the inner diameter of the knob arrangement hole 2.

The above members are attached as follows (see FIG. 2).

From the rear side of the decorative panel 1, the positioning projections 5, 5, 5 of the mounting plate 3 are engaged with the periphery of the knob arrangement hole 2 to position the decorative panel 1 and the mounting plate 3. The mounting plate 3 is fixed to the decorative panel 1 by means such as screws.

As described above, the positioning projections 5, 5, 5
Is set so that the distance from the center of the mounting hole 4 is equal, and the distance from the center of the mounting hole 4 to the outer edge coincides with the radius of the knob arrangement hole 2. The center of the mounting hole 4 coincides with the center of the knob arrangement hole 2.

In this state, the operating shaft 8 of the variable resistance element 6 is inserted from the rear of the mounting plate 3 into the mounting hole 4 and the knob arrangement hole 2, whereby the operation shaft 8 is moved substantially in the front half from the knob arrangement hole 2. It will be in a protruding state. The screw part 9 of the variable resistance element 6 has a substantially front half protruding from the mounting hole 4.
2 is screwed together to fix the variable resistance element 6 to the mounting plate 3.

The main part 7 of the variable resistance element 6 is connected to a circuit board (not shown) arranged in a cabinet.

The operation shaft 8 of the variable resistance element is fitted into the mounting recess 11 of the operation knob 10, whereby the operation knob 10 is externally mounted on the operation shaft 8. Then, the operation knob 10
Is disposed on the front side of the decorative panel 1 with its rear end positioned in the knob arrangement hole 2.

According to the positioning structure of the cabinet and the operation knob of the present invention, the positioning projections 5, 5, and 5 are provided around the mounting hole 4 of the mounting plate 3 as described above, and the mounting to the decorative panel 1 is performed. The plate 3 is positioned.

Therefore, the positioning of the knob arrangement hole 2 and the mounting hole 4 is accurately performed, the centers thereof coincide with each other, and the operation shaft 8 of the variable resistance element 6 inserted into the mounting hole 4 is The center of the operation knob 10 which is located at the center and which is externally fitted to the operation shaft 8 also coincides with the center of the knob arrangement hole 2, and the operation knob 10 is arranged at a predetermined position in the cabinet.

FIGS. 3 to 5 show modifications of the positioning projection.

FIG. 3 shows a first modification 5A of the positioning projection.

At the periphery of the mounting hole 4 of the mounting plate 3, a positioning projection 5A projecting toward the decorative panel 1 is integrally provided.

The positioning projection 5A is formed in an annular shape, and its center hole coincides with the mounting hole 4. The positioning projection 5A is configured such that the distance from the center of the mounting hole 4 to the outer peripheral edge matches the radius of the knob arrangement hole 2 of the decorative panel 1.

FIG. 4 shows a second modification 5B of the positioning projection.
5B,...

Positioning projections 5B, 5B,... Protruding toward the decorative panel 1 are integrally provided around the mounting hole 4 of the mounting plate 3.

The positioning projections 5B, 5B,... Are formed in an arc shape and are provided at four locations on the upper, lower, left and right sides of the mounting hole 4. The positioning projections 5B, 5B,... Are provided so that the distance from the center of the mounting hole 4 is equal, and the distance from the center of the mounting hole 4 to the outer edge is the knob arrangement hole 2 of the decorative panel 1. To match the radius.

FIG. 5 shows a third modification 5C of the positioning projection.
5C,...

Positioning projections 5C, 5C,... Protruding toward the decorative panel 1 are integrally provided around the mounting hole 4 of the mounting plate 3.

The positioning projections 5C, 5C,... Are formed in a small columnar shape and are provided at four locations on the upper, lower, left and right sides of the mounting hole 4. The positioning projections 5C, 5C,... Are provided so that the distance from the center of the mounting hole 4 is equal, and the distance from the center of the mounting hole 4 to the outer edge is the knob arrangement hole 2 of the decorative panel 1. To match the radius.

Thus, in each of the above-described modified examples of the positioning projection, similarly to the above-described embodiment, the positioning of the knob arrangement hole 2 and the mounting hole 4 is accurately performed, and their centers coincide with each other. The operation knob 10 is arranged at a predetermined position.

When a plurality of operation knobs are provided,
Positioning projections may be provided in the mounting holes corresponding to the plurality of operation knobs in the same manner as in the above-described embodiment or each modified example, and positioning may be performed, and positioning of each operation knob with respect to the cabinet may be performed.

When a plurality of operation knobs are provided as described above, each mounting hole corresponding to each knob arrangement hole in which the operation knob is disposed is formed in a separate mounting plate, and a plurality of mounting knobs are provided. A plate may be used.

[0040]

As is clear from the above description, the positioning structure of the cabinet and the operation knob of the present invention is as follows.
A variable resistance element having an operation shaft and arranged in the device, an operation knob supported by the operation shaft of the variable resistance element, and a cabinet having a knob arrangement hole in which the operation knob is arranged; A mounting plate provided on the inner surface side of the cabinet and having a mounting hole for mounting the variable resistance element at a position corresponding to the knob arrangement hole, wherein the operation axis of the variable resistance element is set from within the device. The positioning hole is attached to the mounting plate in a state of being inserted through the hole and the knob arrangement hole, and a positioning projection is formed on a peripheral portion of the mounting hole, and positioning is performed by engaging the positioning projection with the knob arrangement hole. So that the positioning of the knob placement hole and the mounting hole is made accurately, their centers coincide,
The operation axis of the variable resistance element inserted into the mounting hole is located at the center of the knob arrangement hole, and the center of the operation knob externally fitted to the operation shaft coincides with the center of the knob arrangement hole. The operation knob is arranged at.

It should be noted that the shapes and structures of the respective parts shown in the above-described embodiments are merely examples of the embodiments for carrying out the present invention, and these limit the technical scope of the present invention. It must not be interpreted in a confusing way.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a positioning structure for a cabinet and an operation knob according to the present invention together with FIG. 2, and FIG. 1 is an exploded perspective view.

FIG. 2 is an enlarged sectional view.

FIG. 3 shows a modification of the positioning projection together with FIGS. 4 and 5, and FIG. 3 is an enlarged perspective view showing a first modification.

FIG. 4 is an enlarged perspective view showing a second modification.

FIG. 5 is an enlarged perspective view showing a third modification.

FIG. 6 is a longitudinal sectional view showing a conventional cabinet and operation knob positioning structure.

FIG. 7 is a front view showing a conventional problem.

[Explanation of symbols]

1 ... decorative panel (cabinet), 2 ... knob arrangement hole, 3
... Mounting plate, 4 ... Mounting hole, 5 ... Positioning protrusion, 6 ... Variable resistance element, 8 ... Operation shaft, 10 ... Operation knob, 5A ... Positioning protrusion, 5B ... Positioning protrusion, 5C ... Positioning protrusion

Claims (1)

[Claims] 1. A variable resistance element having an operation shaft and arranged in a device, an operation knob supported by the operation shaft of the variable resistance element, and a knob arrangement hole in which the operation knob is arranged. A cabinet formed, and a mounting plate provided on the inner surface side of the cabinet and having a mounting hole for mounting the variable resistance element at a position corresponding to the knob arrangement hole, wherein the variable resistance element has an operation shaft. The positioning hole is attached to the mounting plate while being inserted into the mounting hole and the knob arrangement hole from inside the device. A positioning projection is formed on a peripheral portion of the mounting hole, and the positioning projection is engaged with the knob arrangement hole. A positioning structure for a cabinet and an operation knob, wherein the positioning is performed by performing the positioning.