JP2805437B2 - Changeover switch knob mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a knob mounting structure of, for example, a rotary changeover switch used in a portable radio telephone or the like.

[0002]

2. Description of the Related Art Conventionally, a rotary changeover switch 21 used in a portable radio telephone or the like is fixed to a device housing 22 provided with a shaft hole as shown in FIG. Thereafter, a knob is attached to the knob shaft of the changeover switch 21.

In recent years, electronic devices such as portable radio telephones have been increasingly miniaturized. In order to cope with this, some of switch components mounted on a printed circuit board have been provided with surface soldering type switch components. Has begun to be widely adopted.

[0004]

However, in the case of a changeover switch having a knob shaft as shown in FIG. 6, since the switch itself is fixed to a device housing using a nut or the like,
Wiring between the printed circuit board and the changeover switch may be required, and when the changeover switch is directly mounted on a printed circuit board or the like, the space occupied by the changeover switch becomes larger than other components. There was a problem that the space inside the device could not be used effectively. Further, there is a disadvantage that a space for a fixture such as a nut is required.

On the other hand, in the case of a small changeover switch component which is surface-soldered to a printed circuit board or the like, for example, in a rotary changeover switch having a groove for switching adjustment, a driver for rotating the groove for adjusting the component is used. Since such tools are required and it is difficult to operate easily without the tools, there is a problem that it is impossible to use them as external operation parts.

The present invention has been made in view of the above problems, and provides a knob mounting structure capable of mounting a knob that can be used as an external operation component even with a small surface soldering type changeover switch having an adjusting groove. The purpose is to:

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a knob mounting structure for a selector switch for attaching a knob to a selector switch having no knob mounting shaft. A knob mounting hole provided in the body, a knob fixing plate provided by aligning the position of the knob mounting hole with the hole, and a slit formed in an arc shape along the outer periphery of the hole of the knob fixing plate. And a knob having at least one stopper retaining portion and a knob having at least one retaining protrusion engaged with the knob retaining portion, and the knob retaining protrusion is provided when the knob is inserted into a hole of the knob fixing plate. Pushes the knob holding part in the direction of the slit while passing through it, and the knob retaining projection is locked to the knob holding part and fixed rotatably, provided at the tip of the knob The projecting end is a structure in which to fit in the groove for adjustment of the switch.

Further, in the knob mounting structure of the changeover switch according to the present invention, the knob has an O-ring in contact with the inner peripheral surface of the knob mounting hole.

[0009]

According to the present invention, a knob mounting hole for inserting the knob and a knob fixing plate for rotatably fixing the knob are provided on the surface of the outer casing, and the knob has a knob insertion mechanism, a retaining mechanism and a tip projection. Insert the knob into the knob mounting hole via the knob fixing plate. As a result, it is possible to easily attach a knob that can be used as an external operation component to a small-sized changeover switch of, for example, a surface soldering type that does not have a rotation axis for the knob.

Further, an O-ring is provided on the knob in contact with the inner peripheral surface of the knob mounting hole. As a result, the knob can be fixed, and the knob portion can be waterproofed within the thickness of the outer housing of the electronic device, so that the electronic device can be downsized.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will now be described with reference to FIGS.
This will be described in detail with reference to FIG. In FIG. 1, a surface soldering type rotary changeover switch 4 is fixed on a printed board 5 which is fixed to the outer casing 1 with screws 17 or the like by soldering or the like. The changeover switch 4 is provided with a concave groove (minus groove or plus groove) 14 for adjustment.
Are fitted, and the changeover switch 4 is adjusted by turning the knob 2.

A knob 2 is provided on the surface of the outer casing 1 of the wireless device.
Is provided, and a knob fixing plate 15 for rotatably fixing the knob 2 is fixed to the surface of the outer housing 1 with, for example, an adhesive. Outer housing 1
A positioning rib 6 for positioning the changeover switch 4 so that the concave groove 14 and the mounting hole 7 are aligned with each other is provided integrally with the outer housing 1.

First, the structure of the knob fixing plate 15 made of, for example, a synthetic resin material will be described. 1 to 4, the knob fixing plate 15 has at least one arc-shaped slit 9 (2 in FIG. 1) along the outer circumference of the mounting hole 7.
) Are provided, and between the slit 9 and the mounting hole 7, at least one knob release holding portion 8 (two in the figure) for preventing the knob 2 from coming off is provided. In addition, the notch 16 is for ensuring the flexibility of the pinch-off presser 8.

On the other hand, the structure of the knob 2 is shown in FIG. 1, FIG. 2 and FIG. 5. For example, the knob 2 is inserted into the mounting hole 7 immediately below the portion of the integrally formed knob 2 which is gripped by the finger. A step 10 is provided to prevent the unnecessary insertion when it is performed. Further, the retaining projections 11 are provided at at least one location (two locations in the figure) below the projection. Further, this retaining projection 11
Sliding slopes 12 are provided below each of them.

Next, the operation when the knob is inserted will be described. When the knob 2 is inserted into the mounting hole 7 via the knob fixing plate 15, the sliding slope 12 of the knob 2 slides on the slip-off holding portion 8, and the slip-off holding portion 8 having elasticity by the slit 9 as shown in FIG. It is pushed in the outer peripheral direction by the retaining projection 11, and the retaining portion 8 bends to the position shown in FIG. As a result, the knob 2 is inserted to the insertion completed position as shown in FIG. At this position, the deflection of the retaining portion 8 returns to its original position, and the retaining projection 11 comes into contact with the lower surface of the retaining portion 8, so that the knob 2 is rotatably locked and the tip projection 13 of the knob 2 is set to the changeover switch. 4 and fit correctly with the groove 14.

As shown in FIG. 1, by providing an O-ring on the knob 2 in contact with the inner peripheral surface of the mounting hole 7, a waterproof function can be obtained, and a gap between the outer housing 1 and the knob 2 is supplemented. The rattling of the knob 2 can be prevented.

When the knob 2 is completely inserted into the mounting hole 7, the base of the knob 2 is slightly widened, so that the slit 9 provided in the knob fixing plate 15 is covered by the base. A suitable appearance is maintained without being seen.

[0018]

As described above, the knob mounting structure of the changeover switch according to the present invention is used as an external operation component for, for example, a small surface-mount type changeover switch having no knob rotation shaft. There is an effect that a possible knob can be easily attached.

Further, by providing an O-ring on the knob in contact with the inner peripheral surface of the knob mounting hole, the knob can be fixed, and the waterproofing of the knob within the thickness of the outer casing of the electronic device can be achieved. Is achieved, and the size of the electronic device can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a knob mounting structure according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a configuration of a knob and a knob fixing plate in the embodiment.

FIG. 3 is a plan view showing a configuration of a knob mounting plate in the embodiment.

FIG. 4 is a plan view of the knob mounting plate for explaining the bending of the retaining portion when the knob is inserted into the knob mounting plate in the embodiment.

FIG. 5 is a bottom view showing the bottom surface of the knob in the embodiment.

FIG. 6 is a perspective view showing a method for mounting a conventional changeover switch.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer housing 2 Knob 3 O-ring 4 Changeover switch 5 Printed circuit board 6 Locating rib 7 Mounting hole 8 Knob retaining part 9 Slit 10 Step part 11 Retaining projection 12 Slip slope 13 Tip projection 14 Depressed groove 15 Knob fixing plate 16 Notch Part 17 Screw

Claims (2)

(57) [Claims] 1. A knob mounting structure for mounting a knob to a changeover switch having no knob mounting shaft, comprising: a knob mounting hole provided in an outer housing of an electronic device; and a knob mounting hole and a hole position. A knob fixing plate provided in alignment, and an arc shape along the outer periphery of the hole of the knob fixing plate ;
At least one knob missing pressing portion is formed by providing a slit, small locking the press portion the knob omission
And a knob having at least one retaining projection, when the knob is inserted into a hole of the knob fixing plate,
The knob retainer projection holds the knob holding section to the slide.
Push in the direction of the lit while passing through to prevent the knob from slipping out.
A protrusion is engaged with the knob holding portion and is rotatably fixed, and a tip protrusion provided at the tip of the knob is fitted into the adjusting groove of the changeover switch. Knob mounting structure for changeover switch. 2. The knob mounting structure for a changeover switch according to claim 1, wherein said knob has an O-ring that contacts an inner peripheral surface of said knob mounting hole.