JPS6335439Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an operation display device that can be suitably implemented in connection with a rotary variable resistor used for volume adjustment in a radio receiver, for example.

In such a conventional operation display device, the outer surface of the panel from which the knob for operation protrudes is illuminated by a lamp provided on the outside of the panel. With such prior art, it is difficult to illuminate the entire panel surface with a uniform amount of light;
Brightness and darkness are likely to occur. In particular, the display area of the panel
The knob that protrudes from the panel is covered in shadow by the light from the lamp, making it impossible to provide any lighting effects.

As a means to solve this drawback, a technique has been proposed in Japanese Utility Model Application Publication No. 54-39062 in which the display area of the knob is illuminated from the rear of the panel through a light guide plate.

However, according to this known technology, it is necessary to guide the light guide plate to the back of the knob and to extend a part of the case behind the panel in order to attach a variable resistor, etc. This poses a new problem in that it becomes complicated and difficult to install.

In addition, this known technology is a technology for illuminating the entire panel using one light emitting element for illumination, and the light from the light emitting element for illumination is transmitted through a flat light guide plate provided along the panel. As mentioned above, the light emitting element for lighting is configured to lead to the vicinity of the variable resistor, etc., so that the light emitting element for lighting Illumination light from the element cannot be guided sufficiently. Therefore, the area of the display section that is illuminated by the illumination light near the knob of the panel is limited to the area closer to the illumination light than the operation rod, and the light emitting element for illumination is displayed in the area on the opposite side with respect to the operation rod. cannot form a section.

An object of the present invention is to provide an operation display device that has a simple configuration and is capable of clearly displaying a display section around a knob on a front panel over the entire circumference.

The present invention includes an electric signal generating element that has an operating rod and whose output electric signal changes when the operating rod is angularly displaced around its axis; and a knob that is fixed to the end of the operating rod. a light-emitting element; a panel having an insertion hole through which the knob is inserted so as to protrude outward; and a panel having a display section made of at least a translucent area around the outer periphery of the insertion hole; and a panel through which the operating rod is inserted. The electric signal generating element is fixed therein, and the light emitting element is fixed on a line substantially parallel to the axial direction of the display section, and the light from the light emitting element is directed to the display section of the panel. The operation display device is characterized by comprising: a support member made of a translucent material that leads to the display section from the rear of the display section.

FIG. 1 is an exploded perspective view of an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view thereof. A variable resistor 1 for adjusting the volume of a radio receiver or the like includes an operating rod 2, a main body 4 that outputs an electric signal to a lead wire 3 corresponding to the angular displacement of the operating rod 2 around its axis, and the main body 4. The mounting tube 5 is fixed to the main body 4 and partially surrounds the operating rod 2. The mounting tube 5 is provided with external threads. A serration is formed at the tip 6 of the operating rod 2. The knob 7 is basically a bottomed cylindrical body 8 made of a transparent material such as synthetic resin, and the outer surface of the bottom 8a of the bottomed cylindrical body 8 is coated with a transparent paint. A light-transmitting region 9 is formed for this purpose, and a light-shielding paint 10 is applied to the remaining surface of the bottomed cylinder 8. A protrusion 8b is formed extending inward in the axial direction from the bottom 8a of the bottomed cylinder 8. The tip portion 6 of the operating rod 2 is fitted into this protruding portion 8b.

The support member 11 is made of a translucent material, such as synthetic resin. This support member 11 has a generally truncated conical outer shape. A recess 12 having a circular cross section into which the knob 7 is partially fitted is formed in the support member 11 on its large-diameter end surface 11a side. A recess 13 having a circular cross section into which the main body 4 of the variable resistor 1 is fitted is formed on the small diameter end surface 11b side of the support member 11. The axis of the support member 11 coincides with the axis of the recesses 12 and 13. A mounting wall 14 is formed between the recesses 12 and 13, and an insertion hole 15 is bored in this mounting wall 14. A mounting cylinder 5 of the variable resistor 1 is inserted through the insertion hole 15, and the mounting cylinder 5 is screwed into a nut 16 on the side opposite to the main body 4 with respect to the mounting wall 14. In this way, the variable resistor 1 is fixed to the mounting wall 14. A plurality of light emitting diodes 17 are fixed to the small diameter end surface 11b of the support member 11 at intervals in the circumferential direction. Light from the light emitting diode 17 is provided within the support member 11 . A plurality of outward brackets 18 are formed on the large diameter end surface 11a of the support member 11 in the circumferential direction.

The panel 19 includes a light-transmitting area 21 for display, which has a plate 20 made of a light-transmitting material, such as a synthetic resin, coated with a light-transmitting paint on the outer surface thereof, and a light-blocking area 22, which has a light-blocking paint coated thereon. and has. The panel 19 is provided with an insertion hole 23 through which the knob 7 is inserted. The knob 7 partially projects outward from the panel 19. Support member 11 is fixed to panel 19 with screws 24. Insertion hole 23
The axis coincides with the axis of the support member 11. In order to prevent light from leaking outward from between the insertion hole 23 and the outer peripheral surface of the knob 7, a plate-shaped ring 25 made of a light-shielding material is provided to cover the outer periphery of the knob 7.

A translucent region 21 is arranged within the projection range of the large-diameter end surface 11a of the support member 11 in the axial direction. The support member 11 guides the light from the light emitting diode 17 over the range in which the transparent region 9 of the knob 7 is angularly displaced. In this way, when viewed from the outside of the panel 19, a display is performed in which the light-transmitting areas 9 and 21 appear bright due to the light from the light-emitting diode 17.

In order to allow the operating knob 7 to operate only a portion of the angular displacement range around the axis of the operating rod 2 of the variable resistor 1, a bottomed cylindrical body 8 of the knob 7 is provided. is the bottomed cylinder 8
A stopper 26 is formed which projects outward in the radial direction. A stopper 27 is formed in the recess 12 on the support member 11 and can protrude radially inward and abut against the stopper 26 . Due to the contact between the stoppers 26 and 27, the amount of angular displacement of the operating rod 2 around the axis due to the operation of the knob 7 is limited.

As another embodiment of the present invention, instead of the translucent area 9 or 21, a translucent paint having a different hue from that of the translucent areas 9 and 21 may be applied to form the translucent area. As yet another embodiment of the present invention, the light-shielding region 22 may be replaced with a light-transmitting region, and the light-transmitting regions 9 and 21 may be replaced with light-shielding regions. Instead of the variable resistor 1, an electric signal generating element having another configuration that derives an electric signal according to the amount of angular displacement of the operating rod 2 may be used.

As explained in detail above, according to the present invention, the function of the light guide plate for illuminating from the rear of the panel is performed by the support member that fixes the electric signal generating element, so that the front panel can be easily illuminated with a simple structure. The display area around the knob can be clearly displayed,
The number of parts and installation man-hours can be reduced, resulting in lower costs.

Moreover, in the present invention, the electrical signal generating element such as the variable resistor to which the knob is attached is first attached to the support member and then attached to the panel, thereby improving workability as described above. be.

Further, in the present invention, the light from the light emitting element is configured to be guided from the rear of the display part of the panel to the display part via the support member, and therefore the light from the light emitting element is guided to the display part through the support member. It will be guided almost parallel to the operating rod. As a result, even if the display part is formed around the entire circumference of the operating rod,
It is possible to guide light from the light emitting elements to the display section.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of one embodiment of the present invention;
The figure is a longitudinal cross-sectional view. DESCRIPTION OF SYMBOLS 1... Variable resistor, 2... Operating rod, 7... Knob, 9, 21... Light-transmitting area, 10, 22... Light-blocking area, 11... Supporting member, 15, 23... Insertion hole , 17... light emitting diode, 19... panel.

Claims (1)

[Claims for Utility Model Registration] An electric signal generating element that has an operating rod and whose output electric signal changes when the operating rod is angularly displaced around an axis; a panel having: a fixed knob; a light-emitting element; an insertion hole through which the knob is inserted so as to project outward; and a display portion comprising at least a translucent region around the outer periphery of the insertion hole; It has an insertion hole through which an operating rod is inserted, and the electric signal generating element is fixed therein, and the light emitting element is fixed on a line substantially parallel to the axial direction of the display section, and the light from the light emitting element is transmitted to the An operation display device comprising: a support member made of a translucent material that leads from the rear of a display section of a panel to the display section.