JPH039036Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Industrial application field) This invention is an optimal one for use in oscilloscopes, etc.
This invention relates to a knob display device for a two-shaft function type rotary switch.

(Prior art) Conventionally, the sweep time of the A channel and B channel of a two-phenomenon oscilloscope has been set using a coaxial rotary switch, but for example, the range of the A channel is about 20 times that of the B channel. If the settings are such that the sweep times of both channels are switched in parallel, it is necessary to rotate the two knobs so that they do not deviate, and after the preceding knob reaches its maximum range. Only the trailing knob must be rotated, making the operation complicated.

Therefore, in the above-mentioned oscilloscope, it is possible to perform the above-mentioned switching using a 1-axis 2-function rotary switch, but in general, the knob display of the 1-axis 2-function rotary switch is extremely troublesome, and especially the above-mentioned When used in a two-phenomenon oscilloscope such as the above, it is difficult to properly and accurately display the knobs.

(Purpose of the invention) Therefore, the object of the invention is to provide a knob display device for a one-axis two-function rotary switch that is most suitable for use in a two-phenomenon oscilloscope or the like.

(Structure of the invention) The knob display device of the invention is a knob display of a 1-axis, 2-function rotary switch. An index and a first blindfold part are provided, and a fixed display part on the panel surface is provided with a numerical display part, a fixed index, and a second blindfold part, and as the movable knob is rotated, the second blindfold part The first indicator is made invisible by the second blind part in the fixed display part, and the fixed indicator is made to appear, and the second indicator and the fixed indicator are used to display a predetermined value on the numerical display part. It is configured to give instructions.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

The drawing shows an example in which the sweep time setting knob of a two-phenomenal oscilloscope is applied. 1 is a movable knob, and 2 is a transparent indicator display plate fixed to the bottom of the movable knob 1. The first indicator 2a and the second indicator 2b are displayed,
Further, blind portions 2c are formed by coloring the indicator display plate 2, and these are arranged at predetermined frequency division positions.

3 is a fixed display part of the panel board of the device, and is provided with a numerical value display part 3a;
A second blind portion 3b is provided in a frequency-divided portion. This second blind part 3b is for making the first indicator 2a invisible when it comes to this position as the movable knob 1 rotates, and in the embodiment, the first indicator 2a is not visible. Although the parts are painted in the same color, for example, a concealing plate may be provided only in this part. 3c is a fixed indicator provided at the end of the numerical display section 3a, and the second indicator 2b
are arranged so that they overlap.

The second indicator 2b is designed to indicate the range of the B channel, but the numerical value on the numerical display section 3a is 25 times the indicator 2b (in some places) in the embodiment described later (Fig. 3 A, B). 20 times).

An example of the use of the knob display device configured as described above will be explained based on FIGS. When the hidden part 3b and the fixed index 3c are completely hidden, the index 2a and the fixed index 3 are separated as shown in B.
The indicators 2a and 2b indicate a numerical value at a predetermined magnification until C is polymerized, and when further rotated from there, C
As shown, the indicator 2a overlaps with the second blind part 3b and becomes assimilated and becomes invisible, and at the same time, the fixed indicator 3c appears, and in subsequent rotations, the indicator 2b approaches the fixed indicator 3c. After this, numerical values are displayed so that the values shown by the two become closer to each other. Finally, as shown in D, the indicator 2b is superposed with the fixed indicator 3c, and the values shown by both become the same. Of course, if the rotary knob 1 is rotated in the opposite direction, the display operation will be reversed.

Note that a rotary switch for the A channel and a rotary switch for the B channel are connected to the single shaft 4, and their values (for example, resistance values) are set so as to obtain the predetermined offset amount (25 times). has been done. However, in the B channel rotary switch, after the leading indicator 2a reaches the maximum range, the resistance value etc. do not change even if the shaft 4 rotates further.

(Effect of the invention) According to the knob display device according to the invention, the following function is operated following the leading side function after the leading side function reaches the maximum range, such as a one-axis two-function type such as an oscilloscope. When used as a rotary switch knob display, the relative positions of each instruction will not shift until the specified position is reached, and the display is highly reliable.It is also suitable when ultimately setting both functions to the same setting. The numerical value etc. can be displayed accurately.

[Brief explanation of the drawing]

The drawings show an embodiment of the knob display device according to the present invention, in which FIG. 1 is an exploded perspective view, FIG. 2 is an exploded plan view, and FIG. 3 is an explanatory view for use. 1; Movable knob, 2; Index display board, 2a; 1st
Indicator, 2b; Second indicator, 2c; Blindfold part, 3;
Fixed display section, 3a; numerical display section, 3b; second blindfold section, 3c; fixed index.

Claims (1)

[Scope of utility model registration request] A knob display of a 1-shaft, 2-function type rotary switch, in which a transparent indicator display plate fixed to the bottom of a movable knob is provided with two indicators, a first and a second indicator, and a first blind part, A fixed display section of a panel board of the device is provided with a numerical display section, a fixed index, and a second blind section, and as the movable knob is rotated, the first index can be visually recognized by the second blind section. The knob display device is configured such that the fixed index disappears and the fixed index appears, and the second index and the fixed index indicate a predetermined numerical value on the numerical display section. .