JPH0129582Y2 - - Google Patents

Description

[Detailed explanation of the invention] Conventionally, when measuring the voltage, resistance, frequency, etc. of each part of an electronic circuit, the tip of the measurement probe was brought into close contact with the point to be measured, and the input was transmitted to a separate main body via a lead and displayed. are doing. This requires alternately looking at the point to be measured and the display, which is extremely inconvenient as the measuring needle is likely to contact poorly, especially when measuring a minute point. The present invention improves this point.

In the figure, 1 is a measuring needle whose tip touches the point to be measured, 2 is a vertically mounted digital display for the higher digits, 3 is a digital display following the upper digits, and 4 is the circuit to be measured with a clip attached to the tip. 5 is a power supply/signal lead for operating this probe, 6 is an indicator light that shows the status of measurement results, polarity, overflow, compliance, etc., 7 is for switching the range of this probe or measurement items, etc. , or a control switch used for display commands, etc. 8 is a probe case that is easy to handle.

This operation connects 1 to the measurement point and 4 to its common or ground circuit, leading the input to the display drive circuit. Note that when this drive circuit is housed inside 8, 5 becomes a lead dedicated to the power supply, and it is also possible to attach a clip to the tip and connect it to the power supply of the circuit under test.Furthermore, if a battery is built-in, 5 is unnecessary. Become.
The output of the drive circuit is added to 2 and 3, and the input from 1 is always displayed.

As described above, according to the present invention, the probe can be made sufficiently thin, and the display device is placed close to the measuring needle, so it is easy to place the point to be measured and the display within the same field of view, and quick and accurate measurements can be performed. It becomes possible. In particular, in digital circuits, it is often sufficient to use only the upper digits, and there is no need for a zero blanking circuit, which is extremely useful. It should be noted that the difficulty in reading the display due to the vertical arrangement is not a problem compared to the advantages of ease of handling due to the elongated structure and use of a large display. In addition, it is possible to use 7 to expand the measurement range or measurement items. Furthermore, it can be applied to display symbols and codes, and in addition to measurement values such as voltage, current, resistance, and frequency, it is used to indicate measurement points such as part numbers, and 7 and 6 are used together to display the suitability of input and judgment. It can also be used as a probe for automatic measuring equipment, and its utility value is extremely high.

[Brief explanation of the drawing]

The figure is a perspective view of the probe body with an indicator of this invention. 1 is the measuring needle, 2 is the digital display of the upper digit, 3
is the digital display following the upper digits, 4 is the common lead, 5 is the power/signal lead, 6 is the indicator light, 7 is the switch, and 8 is the case.

Claims (1)

[Scope of utility model registration request] A probe with a display in which the upper digit of a digital display is placed near the measuring needle and its base, and then multiple displays are arranged vertically in the order of the digits.