JPS6141303Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a dial display device that can be applied to dial devices for frequency tuning (tuning) in various receivers such as radio receivers and tuners, and various dial devices in various other devices. It is something.

Conventionally, the dial display devices of portable devices such as radio receivers and tuners that can be inserted into the breast pocket of clothes, etc., have to be smaller than those of larger devices. Especially in devices with two or more bands that display two or more types of dial scales (frequency scales) such as AM and FM on a single rotary plate, it is necessary to put a large number of numbers and letters in a small area. Therefore, the numbers and letters must be made small, making them extremely difficult for users to see.

The present invention was devised in view of the above-mentioned circumstances, and aims to provide a dial display device that can display a dial in a small area with large numbers, letters, etc. in an extremely easy-to-read manner. be.

An embodiment in which the present invention is applied to a dial device of a portable device such as a radio receiver or a tuner will be described below with reference to the drawings.

First of all, Figure 1 shows the entire pocketable device 1. On the top surface of the cabinet 2, which is made of ABS resin, there are a knob 3 for dial operation, a knob 4 for adjusting volume, and a jack for inserting an earphone plug. 5th grade is provided. Also, cabinet 2
A knob 6 for switching a power switch, knobs 7 and 8 for switching a band, etc. are provided on the front surface of the unit.

Next, a dial device and its dial display device will be explained with reference to FIGS. 2 to 4. A dial shaft 13 is rotatably attached to chassis 11 and 12 molded from ABS resin and provided inside the cabinet 2. It is pivoted on. A knob 3 is attached to the upper end of the dial shaft 13. In this case, the knob 3 is made of opaque resin and has a knurl 1 on the outer periphery.
4 and a transparent flat plate part 17 molded from transparent resin and having a cylindrical part 16 in the center are joined together by adhesive or the like. The knob 3 is fitted with its cylindrical portion 16 to the upper end of the dial shaft 13 in an oval-shaped structure, and is screwed by a set screw 18.

By the way, inside the knob 3, there are two upper and lower dial plates 19 and 20 molded from synthetic resin, which are attached to the dial shaft 1.
3 and is installed on the same axis. In this case, the upper scale plate (hereinafter referred to as the upper scale plate)
19 is provided with a through hole 21 in the center, and a cylindrical part 22 is provided in the lower part of the outer periphery, and is fixed on the chassis 11 by the cylindrical part 22 with an appropriate fitting structure, screwing, etc. There is. The lower scale plate (hereinafter referred to as the lower scale plate) 20 is provided with a through hole 23 in the center, and cylindrical parts 24 and 25 are provided above and below the outer peripheral part of the through hole 23. The lower cylindrical portion 25 is rotatably fitted to the outer periphery of a cylindrical portion 26 provided on the chassis 11. For example, an FM dial scale 27 is displayed on the upper scale plate 19, and for example, on the lower scale plate 20.
An AM dial scale 28 is displayed, and a window 29 consisting of a notch is provided in a part of the periphery of the through hole 21 of the upper scale plate 19 so that the AM dial scale 28 can be viewed directly. Also, lower scale plate 2
The upper cylindrical part 24 of 0 is the through hole 2 of the upper scale plate 19.
A pointer 3 for the FM dial scale 27 is inserted into the cylindrical portion 24 of the FM dial scale 27 and is fixed to the cylindrical portion 24 by adhesive or the like.
0 is placed on the upper scale plate 19.

On the other hand, a variable capacitor (frequency tuning element) 32 is attached to the chassis 12, and its rotating shaft 33 and dial shaft 13 are connected to pulleys 34, 35, for example.
They are interlocked with each other by a threading system (which may also be a gear mechanism) with a drive system 36 wound between them. Further, the rotating shaft 33 and the lower scale plate 20 are, for example, a gear 3 provided on the rotating shaft 33.
7 and a gear 38 provided on the outer periphery of the cylindrical portion 25 (this may be a threading type).

According to the dial device and its dial display device described above, when the knob 3 is rotated, the dial shaft 13 is first rotated, the rotary shaft 33 is rotated by the driving thread 36, and the frequency tuning operation by the variable condenser 32 is performed. channel selection operation) is performed. At the same time, the lower scale plate 20 is rotated by the rotary shaft 33 via the gears 37 and 38, and the window portion 2 of the fixed upper scale plate 19 is rotated.
AM dial scale 28 is sequentially displayed within 9.
At the same time, the pointer 30, which is rotated together with the lower scale plate 20, sequentially indicates the FM dial scale 27 on the fixed upper scale plate 19.

That is, with the reception band set in advance by the band switching knobs 7 and 8, by rotating the dial operating knob 3, the frequency tuning operation for the FM band or AM band is performed by the variable capacitor 32. be exposed. The tuning frequency is displayed within the knob 3 by dial scales 27 and 28 on the upper and lower scale plates 19 and 20, respectively. Note that the user directly looks and reads the FM dial scale 27 indicated by the pointer 30 or the AM dial scale 28 displayed on the window 29 through the transparent flat plate part 17 of the knob 3.

However, when levering the two types of dial scales, FM dial scale 27 and AM dial scale 28,
The two types of dial scales 27 and 28 are displayed together in a very small area within the dial, but the two types of dial scales 27 and 28 are configured to be displayed separately on the upper and lower two scale plates 19 and 20, respectively. The numbers, letters, etc. on the seed dial scales 27 and 28 can be displayed in a large size for easy viewing.

Although the embodiment of the present invention has been described above, the present invention is widely applicable to various receivers such as radios and various dial display devices other than receivers.

Further, in the embodiment, the upper scale plate 19 is fixed and the lower scale plate 20 is configured as a rotating plate, but the opposite configuration can also be adopted.

Further, in the embodiment, a notch was used for the window portion 29, but
It does not necessarily have to be a cutout or a through hole; for example, the upper scale plate 19 may be made of a transparent plate, and only the portion corresponding to the window portion 29 may be left transparent while the other portions may be printed opaque. can also be adopted.

In this invention, as mentioned above, two scale plates are arranged one above the other on the same axis, and a part of the upper scale plate is provided with a window so that the lower scale plate can be viewed directly.
A dial display device consisting of one of these two scale plates is fixed and the other is a rotating plate, and the lower scale plate is configured so that the lower scale plate can be viewed directly from the window of the upper scale plate. Therefore, the numbers, characters, etc. of the dial scales displayed on these two scale plates can be maximized without being restricted by each other. Therefore, the dial can be displayed in a small area with large numbers, letters, etc. in an extremely easy-to-read manner, making it possible to obtain an optimal dial display device especially for small-sized equipment.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is an overall perspective view, Fig. 2 is a sectional view of the main part, Fig. 3 is a plan view of the main part, and Fig. 4 is a main part. FIG. In addition, in the symbols used in the drawings, 3... Dial operation knob, 13... Dial shaft, 19,
20...Scale plate, 27...FM dial scale, 2
8...AM dial scale, 29...window, 30...
...Guidelines.

Claims (1)

[Scope of utility model registration request] Two scale plates are arranged one above the other on the same axis, and a window is provided in a part of the upper scale plate so that the lower scale plate can be viewed directly. A dial display device in which one part is fixed and the other part is a rotating plate.