JPH0320799Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a dial display device for communication equipment, etc.

Configuration of Conventional Example and Its Problems As a conventional method for driving a dial device, in addition to a method using a rope, a structure in which a knob is directly attached to the rotating shaft of a variable capacitor is known.

FIG. 1 shows an example of a conventional dial display device, in which 1 is a tuning knob, and 2 is a dial display device.
3 is a variable capacitor, 4 is a transparent panel, and 5 is a printed wiring board. Here, the variable capacitor 3 is screwed to the printed wiring board 5, and the knob 1 is screwed to the rotating shaft of the variable capacitor 3. Further, the transparent panel 4 is attached to the cabinet 2 with adhesive or the like. A substantially semicircular index 6 as shown in FIG. 2 is formed on the surface of the knob 1. As shown in FIG. The rotation axis of variable capacitor 3 is usually 0°~
The knob 1 attached to this rotating shaft rotates up to 174.6 degrees, and as shown in Figure 2, knob 1 rotates gradually from position A when the rotation axis is 0 degrees to position B when the rotation axis is 174.6 degrees. do.

The operation of the conventional dial drive mechanism configured as described above will be explained below with reference to FIG. 3. First, in order to rotate the shaft of the variable capacitor 3 when selecting a channel, the tuning knob 1 is rotated. Then, the indicator 6 formed on the knob 1 appears to move left and right along the display window 7 provided in the cabinet 2, and the frequency marked on the cabinet 2 can be read depending on the position of the movement. The structure is such that it can be done.

However, in the above configuration, the knob 1
As shown in FIG. 3, the movement of the upper indicator 6 has a problem in that the slope is reversed near the center of the display window 6, making it very difficult to see.

Purpose of the invention The purpose of this invention is to solve the above-mentioned conventional problems.The purpose of this invention is to make the movement of the indicator formed on the knob as small as possible, and to provide a design that has a variety of changes. That is.

Structure of the invention The dial display device of the invention includes a cabinet having an L-shaped display window with two long and short sides on the front surface, and a cabinet that is disposed on the back side of the display window of the cabinet, and the outer peripheral part of the cabinet is exposed to the outside of the cabinet. The display board is provided with a display board that also serves as a knob, and the display board is installed such that its center of rotation is located inside each side of the L-shaped display window, and an indicator formed on the display board is provided. When the indicator is located at the end of the long side of the display window, a curve having a center of curvature in the direction of the corner of the display window is used, so that movement of the indicator with little change can be obtained.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 4 and 5. In the figure, 10 is a cabinet, on the surface of which is formed a dial display section 11 and an L-shaped display window 12 consisting of two long and short sides.
On the back side of this display window 12 is a display board 13 that also serves as a knob.
is installed, and the outer periphery of this display board 13 is exposed to the outside of the cabinet 10 so that it can be rotated.

Here, the center of rotation of the display board 13 is located inside each side of the L-shaped display window 12, which has two long and short sides. An indicator 14 is displayed on the surface of the display board 13, and the indicator 14 is a circular arc having a center of curvature in the direction of the L-shaped corner of the display window 12 when located at the long side end of the display window 12. It is formed by. The display plate 13 is connected at its center to a rotating shaft of a variable capacitor 16 attached to a printed wiring board 15, thereby enabling a predetermined tuning operation.

The operation of the above configuration will be explained with reference to FIG. 5. The operation for channel selection is the same as in the conventional example described above, when the display board 13 is rotated, the indicator 14 formed on the display board changes from the position A (when the variable condenser is at 0°) to the position B (when the variable capacitor is 0°) in the figure. When the variable capacitor is 174.6°). At this time, as shown in FIG. 5, by making the display window 12 formed on the cabinet 10 L-shaped, it is possible to obtain the movement of the index 14 with little change, and also to make it possible to have a change in design. It has a simple configuration and can be provided at low cost.

In this embodiment, an example in which the index 14 is a circular arc has been described, but the same effect can be obtained even if the index 14 is a parabola as shown in FIG.

Effects of the invention The present invention has an L-shaped display window with two long and short sides on the front of the cabinet, and a knob-cum-display plate that is placed on the back side of the display window and whose outer periphery is exposed outside the cabinet. , the rotation center of the display board is located inside each side of the L-shaped display window, and when the indicator formed on the display board is located at the end of the long side, an L-shaped corner is formed. This is a dial display device that has a curved line with the center of curvature in the direction.The relationship between the display window and the index allows for the movement of the index with little change, and also allows for a simple configuration that allows changes in design. It can be provided at low cost.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a conventional dial display device, Fig. 2 is a plan view showing the movement of a conventional display board, Fig. 3 is a view of the movement of a conventional dial drive as seen from the front of the cabinet, and Fig. 4 is a plan view showing the movement of a conventional dial display. A sectional view of a dial display device according to a first embodiment of the present invention, FIG. 5 is a diagram showing the movement of a dial drive according to the present invention as seen from the front of the cabinet, and FIG. 6 is a diagram showing a dial drive according to a second embodiment of the present invention. FIG. 10... Cabinet, 11... Dial display section, 12... Display window, 13... Knob/display board, 14... Index, 15... Printed wiring board, 16
...varicon.

Claims (1)

[Claims for Utility Model Registration] (1) A cabinet having an L-shaped display window with two long and short sides on the front surface, and a cabinet disposed on the back side of the display window of the cabinet, the outer periphery of which is exposed to the outside of the cabinet. The display board is provided with a display board that also serves as a knob, and the display board is installed such that its center of rotation is located inside each side of the L-shaped display window, and an indicator formed on the display board is provided. A dial display device having a curved line having a center of curvature in a direction of a corner of the display window when the dial is located at a long side end of the display window. (2) Claim No. 1 for utility model registration, which is characterized in that the indicator curve on the dial display board is arc-shaped.
Dial display device as described in section. (3) Claim No. 1 for utility model registration, which is characterized in that the index curve on the dial display board is a parabola.
Dial display device as described in section. (4) The dial display device according to claim 1, wherein the index curve on the dial display board is a straight line.