JPH0311968Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to, for example, a case device for a radio receiver, and is particularly concerned with making electronic equipment such as a radio receiver thinner.

[Conventional technology]

In a conventional radio receiver, for example, as shown in FIG.
4, it was rotatably attached to the cabinet 55.

When attaching the rotary knob 52 using the E-ring 54, the E-ring 54 is fitted onto the rotation center shaft 53 from a direction perpendicular to the axial direction by an E-ring attaching device. Therefore, the cabinet 55
There must be at least a space in which the E-ring attachment device can be placed around the center of rotation of the E-ring.

[Problem that the invention attempts to solve]

A major problem is how to arrange rotary variable electric components that involve mechanical movement, such as rotary variable capacitors and rotary variable resistors. This is because, although electronic components such as resistors, capacitors, and diodes have been miniaturized due to the development of chip components, it is not easy to miniaturize components that involve mechanical movement.

Conventionally, for example, a rotary knob of a rotary variable capacitor has been attached using an E-ring. For this reason, it is necessary to secure a space for arranging the E-ring mounting device, and it is not possible to form irregularities around the area where the rotation center shaft of the cabinet is inserted. Therefore, the thickness of the conventional radio receiver cabinet is determined by the thickness of the variable capacitor, etc., and there is a limit to how thin the radio receiver can be made.

Although it is possible to reduce the thickness of the rotary knob to make it thinner, it is not preferable to make the rotary knob smaller or thinner because it leads to deterioration in operability.

Therefore, the purpose of this invention is to secure a space around the rotation center axis by attaching the rotary knob without using an E-ring, and to make it possible to use electronic equipment such as radio receivers without being limited by the size of the parts. An object of the present invention is to provide a case device that can be made thinner.

[Means for solving problems]

This device has rotary knobs 21, 41 each having a cavity with an opening at one end so that the rotational center shafts 22, 42 of the rotary knobs 21, 41 protrude toward the opening, and rotatably attaches the rotary knobs 21, 41 to the case 1. The case 1 is provided with a curved protrusion 4 in which a portion corresponding to the opening is curved and protruded into the cavity.
A rotary knob 21, 41 is provided with a shaft insertion hole 3 passing through the housing 1, and at least a part of the component is disposed in the space formed by the curved protrusion 4 inside the case 1. It is a housing device with

[Effect]

One end of the rotary knobs 21, 41 is an opening, and the case 1 is provided with a curved protrusion 4 at a portion corresponding to the opening. Components are disposed within the space formed by the curved protrusion 4.

〔Example〕

An embodiment of this invention will be described below with reference to the drawings. In FIG. 1, 1 and 2 are cabinets. The cabinets 1 and 2 are, for example, resin molded products. As shown in FIG. 2, a shaft insertion hole 3 is bored in the cabinet 1, and a circularly curved protrusion 4 is formed around the shaft insertion hole 3. This shaft insertion hole 3 is, for example, a variable capacitor 9.
The rotating shaft of a rotary knob 21 fixed to the rotating shaft 20 of the rotary knob 21 is inserted.

A rigid board 5 and a flexible board 6 on which components are arranged are attached to the cabinet 1.
The rigid board 5 has relatively large electronic components such as an electrolytic capacitor 7, a ceramic filter 8,
A variable capacitor 9 is arranged. Chip components 10, 11, 12 such as resistors, capacitors, diodes, etc. are arranged on the flexible substrate 6. A flexible substrate 6 is fixed to the rigid substrate 5 by, for example, soldering, and an electrical connection is made between the rigid substrate 5 and the flexible substrate 6.

The cabinet 1 is formed with a projection 15 having projections 13, 14 and a locking pawl 16. In order to form the locking pawl 16, the locking pawl 16 is attached to the cabinet 1 when the cabinet 1 is formed.
A metal core forming 6 is inserted, which creates a notch 17. However, the dial scale plate 18 is stuck to this notch 17 and it is closed.
It is not exposed to the outside.

The rigid board 5 on which the components are arranged has a protrusion 13,
14 and the locking claws 16 of the protrusion 15, and are fixed. A flexible substrate 6 on which chip parts 10, 11, and 12 are arranged is a cabinet 1.
A portion of the flexible substrate 6 is fixed inside the curved protrusion 4. The cabinet 1 and the cabinet 2, to which the rigid substrate 5 and the flexible substrate 6 are attached, are fixed with screws 19, for example.

By fixing the rigid substrate 5 to the cabinet 1, the rotating shaft 20 of the variable capacitor 9 and the shaft insertion hole 3 of the cabinet 1 are arranged coaxially.

A rotary knob 21 is attached to a rotatable shaft 20 of the variable capacitor 9.

The rotary knob 21 is made of aluminum, for example, and has a cylindrical shape with an opening at one end, as shown in FIG. Rotary knob 21
A rotation center axis 22 is formed at the center of the. A protrusion 23 is formed on the peripheral edge of the rotary knob 21 .
When the rotary knob 21 is attached to this protrusion 23,
It is brought into contact with the cabinet 1. In this way, protrusion 2
3 and by narrowing the area of the portion that contacts the cabinet 1, the rotation of the rotary knob 21 becomes smooth.

A groove 24 having a shape corresponding to the shape of the rotation shaft 20 of the variable capacitor 9 is formed at the tip of the rotation center shaft 22 of the rotary knob 21 . A groove 25 is formed at the peripheral edge of the rotation center shaft 22 .

The rotary knob 21 is rotatably attached to the cabinet 1 using a retaining ring 26, as shown in FIGS. 4 and 5.

The retaining ring 26 is made of, for example, steel, and has semicircular notches 27 and 28 formed therein. Projections 29 and 30 are formed on the inner peripheries of the notches 27 and 28, respectively, and the projections 29
and 30 are projected inward of the notches 27 and 28, respectively. Further, a protrusion 31 is formed on the outer periphery of the retaining ring 26.

The retaining ring 2 is inserted through the shaft insertion hole 3 of the cabinet 1.
6 and the rotation center shaft 22 of the rotary knob 21 are arranged to face each other, and the retaining ring 26 is press-fitted into the rotation center shaft 22, as shown in FIG.
is rotatably fixed to the cabinet 1.

That is, by press-fitting the retaining ring 26 into the rotation center shaft 22, the rotation center shaft 2 is inserted into the notches 27 and 28.
2 is inserted, and the protrusions 29 and 30 fit into the groove 2.
5 is inserted. The retaining ring 26 prevents the rotary knob 21 from coming off.

The rotating shaft 20 of the variable capacitor 9 is the rotating knob 21
The rotary knob 21 is fitted into a groove 24 formed in the rotation center shaft 22 of the variable capacitor 9, and the rotation of the rotary knob 21 is transmitted to the rotary shaft 20 of the variable capacitor 9. Note that the protrusion 31 is provided to prevent the variable capacitor 9 from over-rotating. Although not shown, a locking pin corresponding to this protrusion 31 is installed on the cabinet 1.

FIGS. 6 and 7 show another embodiment of this invention in which a rotary knob 41 made of resin molding, for example, is used as the rotary knob.

In FIG. 6, the rotation center axis 42 is the rotary knob 4.
It is integrally molded with 1. A groove 4 having a shape corresponding to the rotation shaft 20 of the variable capacitor 9 is formed on the rotation center shaft 42.
A slit 44 is formed on the wall surface of the groove 43.
and 45 form an elastic piece 46, and similarly, an elastic piece 47 is formed opposite to the elastic piece 46. A locking piece 48 is formed at the tip of the elastic piece 46, and similarly, a locking piece 49 is formed at the tip of the elastic piece 47.

The rotation center shaft 42 of the rotary knob 41 is press-fitted into the shaft insertion hole 3 of the cabinet 1. When the rotation center shaft 42 is press-fitted, as shown in FIG.
and 49, the rotary knob 41 is rotatably fixed to the cabinet 1.

The rotating shaft 20 of the variable capacitor 9 is the rotating knob 41
The rotary knob 41 is fitted into a groove 43 formed in the rotation center axis of the variable capacitor 9, and the rotation of the rotary knob 41 is transmitted to the rotation axis of the variable capacitor 9.

[Effect of idea]

According to this invention, one end of the rotary knobs 21, 41 is an opening, and the cabinet 1 is provided with a curved protrusion 4 at a portion corresponding to the opening. Therefore, the flexible substrate 6 and the variable capacitor 9 can be placed within the space formed by the curved protrusion 4. Therefore, the volume of the cabinet 1 is effectively utilized, making it possible to downsize portable electronic devices such as radio receivers, and since the thickness of the cabinet 1 is not easily determined by the size of the variable capacitor 9, The device can be made thinner without making the knobs 21 and 41 thinner.

[Brief explanation of drawings]

Fig. 1 is a partial sectional view of an embodiment of this invention, Fig. 2 is a partial top view of an embodiment of this invention, and Fig. 3 is a sectional view of an example of a rotary knob in an embodiment of this invention. Figures 4 and 5 are perspective views and cross-sectional views used to explain the installation of a rotary knob in one embodiment of this invention, and Figures 6 and 7 are diagrams in another embodiment of this invention. A perspective view and a cross-sectional view used to explain the attachment of the child, and FIG. 8 is a cross-sectional view of a conventional housing device. 1, 2: Cabinet, 3: Shaft insertion hole, 4: Curved protrusion, 5: Rigid board, 6: Flexible board, 9: Rotary variable capacitor, 21, 41:
Rotating knob, 26: retaining ring, 46, 47: elastic piece.

Claims (1)

[Scope of utility model registration request] The central axis of rotation of a rotary knob having a cavity with an opening at one end projects toward the opening side, and the rotary knob is rotatably attached to a casing, and a portion corresponding to the opening is attached to the casing. A curved protrusion is provided in the cavity, a shaft insertion hole is provided in the curved protrusion, and a rotary variable electrical component is disposed in the space formed by the curved protrusion inside the casing. None An enclosure device in which the rotation center shaft and the rotation shaft of the rotary variable electric component are connected through the shaft insertion hole.