JPH04194761A - Auxiliary measuring implement for input-output level - Google Patents

Abstract

PURPOSE:To eliminate false recognition of an arbitrary light-emitting body and to prevent occurrence of short circuit even at a specific potential input- output level by providing test pins connecting with a measuring unit, light- emitting bodies for checking up input-output levels of electronic components, and a switching element for switching the light-emitting bodies ON and OFF. CONSTITUTION:A main body 1 is provided with connecting parts 2, light-emitting bodies 5 and selector switches 6, and when an input-output level of a terminal of aimed IC is to be measured at the time of inspection, therefore, only a corresponding light-emitting body 5 is lighted by turning ON the switch 6 of this light-emitting body 5, on condition that the level is a prescribed one. Accordingly, it can be prevented that the light-emitting bodies 5 other than the aimed one are determined falsely. Even when a specified terminal of the IC contains a specific potential, the light-emitting bodies 5 are prevented from short- circuiting, since the switches 7 are turned OFF beforehand, and thereby breakdown of the IC and a short circuit of a power source are prevented. Since the main body 1 is provided with test pins 3, moreover, the input-output level of the IC can be measured by a measuring unit correctly even with the main body 1 left mounted to a clip.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention provides a human output level device equipped with a test pin that can measure the logical values of input and output levels of electronic components and connectors by connecting it to a measuring device. It relates to measurement aids.

[Prior Art] Conventionally, when measuring the logical value of the input/output level of an IC mounted on a printed circuit board, a first conventional technique uses a clip for the IC. That is, I on the printed circuit board
C is held in place by a clip, and at the time of being held in place, connection terminals at the bottom of the clip are connected to each terminal of the IC. In this state, after connecting the probes of the measuring device to each pin on the top of the clip, it is possible to measure the logic value at each terminal of the IC terminal.

If the terminals of the IC are soldered onto the printed circuit board, it will be difficult for the probe of the measuring device to connect to each terminal, and there is a risk that the clip will touch the adjacent terminals, making it impossible to make accurate measurements. Therefore, it is used to solve this problem.

In addition, in the second prior art, JP-A-62-2.8.977
There is one shown in Publication No. 4. According to the technique disclosed in the same publication, a plurality of light emitting bodies are provided on a clip configured almost similarly to the first conventional technique, and each terminal of the IC and the clip are connected by sandwiching an IC on a printed circuit board with the clip. When the power is turned on after connecting the terminals, each light emitting body is turned on and off according to the logical value of each terminal. For example, if the input/output signal of the IC terminal is "0", current flows through the circuit in the IC clip, causing the corresponding light emitting body to light up, and the input/output signal of the IC terminal.

If is "1", the corresponding light emitter remains off due to no current flowing through the circuit in the IC clip, and therefore, depending on whether the light emitter lights up or not, it can be determined without using a measuring device. Logical values can be easily checked.

[Problems to be Solved by the Invention] By the way, the first and second prior art techniques shown above do not take into consideration the ninth point.

In other words, both the first conventional clip and the second conventional clip are specialized components designed for electronic components as ICs, and are used to measure connectors with terminal pitches different from those of electronic components. There is a problem where it cannot be applied.

In addition, in the second conventional technology, although the clip is provided with light emitters, those light emitters are always turned on (or turned off) if each terminal is at an appropriate input/output level.
Therefore, when inspecting the IC, all terminals other than the target terminal are turned on (or turned off), so if the terminal other than the target terminal is erroneously checked and an inspection error occurs. There is a possibility that it will be said.

Furthermore, if a special potential is included in the input/output level of a specific terminal of an IC, the power must be turned on for inspection, even if the inspector knows in advance which specific terminal it is. As a result, an excessive current flows between the special potential terminal on the IC side and the power supply for displaying the logical value, resulting in a short circuit, which causes a disconnection between the specific person output level terminal and the corresponding light emitting body. In addition, there is a risk that the IC may be destroyed or the power supply may be short-circuited.

The object of the present invention is to solve the problems of the prior art described above.

An object of the present invention is to provide an input/output level measurement auxiliary device that does not misidentify any light emitter and can prevent short circuits even at input/output levels of special potential.
Another object is to provide a versatile input/output level measurement aid that can also be used to inspect connectors.

[! p! ! Means for Solving the Problem] In order to achieve the above object, the input/output level measurement auxiliary device of the present invention includes a clip having a connection terminal connected to each terminal of an electronic component and a plurality of pins connected to a measuring device. A connection part that is used over the clip and is formed to be connectable to the pin of the clip, a test pin that connects the measuring device, and a light emitting body that confirms the input and output level of each terminal of the electronic component, respectively; It is characterized in that it includes a switching section that switches each light emitting body on and off.

Moreover, in the input/output level measurement auxiliary device of the present invention,
It is characterized in that it has a shape that can be inserted into a connector, and that the connecting part is configured to connect with a pin of the connector.

[Operations] As described above, the present invention includes a connection portion formed to be connectable to a pin of a clip, a test pin connected to a measuring device,
Since it is configured with a light emitting body that checks the input/output level of each electronic component and a switching section that switches each light emitter on/off, it is possible to measure the input/output level of the terminal of the target electronic component. At this time, you can check the input/output level of the target terminal by turning on the switching section of the corresponding light emitter. Therefore, since it is only necessary to check whether the light emitter corresponding to the target terminal is turned on or off, it is possible to eliminate inspection errors such as erroneously identifying a light emitter other than the target terminal.

Also, if a specific terminal of an electronic component contains a special potential,
By turning the selector switch off in advance, there will be no excess current flowing between the special potential input/output terminals on the electronic component side and the power supply, which is the case with conventional technology, and this will prevent short circuits in the light emitter. Not only can this be prevented, but it can also eliminate damage to electronic components and short circuits in the power supply.

Furthermore, in the present invention, the input/output level measuring auxiliary device has a shape that can be inserted into the connector, and the connecting part connects to the pins of the connector, so that by inserting it into the connector, the input/output level of the connector can also be tested in the same way. can. Therefore, versatility can be increased accordingly.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

As shown in FIG. 4(b), the input/output level measurement auxiliary device of the embodiment is constructed by placing the main body 1 over a clip 11 connected to an IC (not shown) on a printed circuit board, thereby measuring each terminal of the IC. The input/output level is checked, and the input/output level of each terminal of the connector 17 is checked by inserting the main body 1 into the connector 17 on the printed circuit board as shown in FIG. 5(b). .

Here, the clip 11 handled in this example has two side plates 12, 13 and a pair of side plates 12, 13, as shown in FIG.
A coil spring 14 urges the tips of the two sides to face each other with spring force, and an IC is attached to the tips of the side plates 12 and 13.
A connection part (not shown) that can be connected to each terminal of the side plate 12
, 13 and have respective rows of pins 15 and 16 to which probes of measuring instruments (not shown) can be connected. When this clip 11 clips each terminal of the IC on the printed circuit board at the leading end side of both side plates 12 and 13, each of the connecting portions is connected to each terminal of the IC. In addition, the connector 17 handled in this example is a general one,
As shown in FIG. 5, it has pins 18 having substantially the same shape as the pins 15 and 16 in the respective rows on the top of the clip 11.

To describe specifically the input/output level measurement auxiliary device used by attaching it to the clip 1 and the connector 17, the first
As shown in the drawings and FIG. 2, a main body 1 has a substantially rectangular shape, and a connecting part 2 is provided at the lower part of the main body 1, and a test pin 3 is provided at the upper part.

The connecting portion 2 is disposed in an insertion groove (not shown) formed in the lower part of the main body 1, and each pin 15 and 16 of one row of the clip 11, which will be described later, is inserted into the insertion groove. Alternatively, when each pin 18 of the connector 17 is inserted, it can be connected to each of the pins 15 and 16° 18, respectively. Therefore, each of the connecting portions 2 is arranged at a position corresponding to each pin 15 and 16 of the clip and each pin 18 of the connector.

The test pins 3 are provided on the upper end surface of the main body 1 in a number corresponding to the number of connecting portions 2 and protrude upward, and are connected in series with each of the connecting portions 2 as shown in FIG.

Therefore, when inspecting an IC, the input/output level measurement auxiliary instrument is used by inserting the main body 1 into the pins 15 and 16 of either row of the clip 11 holding the IC.

Further, as shown in FIGS. 1 and 2, a protrusion 4 is formed on the side surface of the main body 1 along its width direction.
A light emitting body 5 is provided on the top of each of the projecting portions 4, and a changeover switch 6 is provided on the side surface of the convex portion 4.

Each of the light emitting bodies 5 is composed of a light emitting diode, etc., as shown in FIG. The resistors R are connected between the intermediate positions between the connecting parts 2 and the respective resistors R connected to the power supply side. During inspection, the light will turn on when the input/output level of the IC terminal is, for example, ``0'', and will turn off when the level is ``1'', so that the input/output level of each terminal of the IC can be confirmed by turning the light on and off. ing. As shown in FIG. 3, the changeover switch 6 is connected between the corresponding light emitting body 2 and the test pin 3 side (connection part 2 side),
By switching, the light emitting body can be selectively switched to either the lighting position or the lighting off position. That is, each changeover switch 6 turns on or off the corresponding light emitting body 5.

Next, the handling of the input/output level measurement auxiliary instrument of the embodiment will be described.

When inspecting the input/output level of the IC on the printed circuit board, first, all the changeover switches 6 of the input/output level measurement auxiliary instrument main body 1 are turned off in advance.

Then, the IC is held between the clips 11 and the pins 16 of one row of the clips 11 to be inspected are shown in FIG. 4 (a).
) and (b), by covering the main body 1 of the input/output level measurement auxiliary instrument, the connecting portion 2 of the main body 1 and the pin 16 are respectively connected. As a result, the pin 16 and the corresponding terminal of the IC are connected via the clip 11.

Thereafter, a measurement inspection is performed by turning on the power for measurement. That is, when trying to measure the input/output level of a target terminal of an IC, turning on the corresponding changeover switch 6 changes the input/output level of the target terminal to the desired level (
For example, if the level is O level), the light emitter 5 will be turned on, and if the input/output level of the target terminal is not at the desired value (Level), the light emitter 5 will remain off.

Additionally, if a specific terminal of the IC is at a special potential, the inspector recognizes the specific potential of the specific terminal, so the inspector can check whether excessive current is flowing between the specific terminal on the IC side and the power supply. To prevent this, the light emitter 5 corresponding to the specific terminal on the IC side is kept in the off state.

Furthermore, when measuring the input/output level of the IC with a measuring device, the measurement is performed with the main body 1 attached to the clip 11 as described above. That is, the main body 1 attached to the clip 11
When the probe of the measuring device is connected to the desired test pin 3 of the IC, the probe and the desired terminal of the IC are connected, so that accurate measurement can be performed by the measuring device.

Therefore, in the embodiment, one main body 1 has a connecting part 2, a light emitter 5. Since each switch 6 is provided, when measuring the input/output level of the terminal of the target IC during inspection, simply turn on the switch 6 of the corresponding light emitter 5, and the predetermined level will be set. As long as the luminous body 5
Since only the light emitters 5 are lit, unlike the prior art in which all the light emitters are lit when the power is turned on, it is possible to prevent erroneously determining a light emitter 5 other than the intended one.

Furthermore, even if a specific terminal of the IC contains a special potential, as described above, since the selector switch 6 is turned off in advance, there is an excessive This not only prevents current from flowing and prevents the light emitter 5 from shorting out, but also
It is possible to eliminate problems such as damage to the IC or power supply short circuit.

Furthermore, since the test pin 3 is provided on the main body 1,
Even when the main body 1 is attached to the clip 11, the input/output level of the IC can be accurately measured using a measuring device.

Furthermore, the lower part of the main body 1 has a shape that can be inserted into the connector 17, and the connecting part 2 at the lower part can also be connected to the pin 18 of the connector 17 as shown in FIG. Therefore, it is possible to have more versatility.

[Effect of the invention] As described above, according to claim 1 of the present invention.

A connection part that can be connected to the pin of the clip, a test pin that connects to a measuring device, a light emitting element that confirms the output level of each electronic component, and a switching part that switches each light emitting element on and off. When measuring the input/output level of the terminal of the target electronic component, you can check the input/output level of the target terminal by turning on the changeover switch of the corresponding light emitter. This eliminates inspection errors such as erroneously identifying a light emitter other than the intended one.Also, even if a specific terminal of an electronic component contains a special potential, by turning the selector switch off in advance, As a result of being able to eliminate damage to electronic parts such as short-circuiting of light emitters and power supplies, it is easy to use and has the effect of improving inspection efficiency.

Further, according to claim 2, since it can be inserted into a connector and connected to the pins of the connector, the input/output level of the connector can also be inspected in the same way, resulting in the effect of providing versatility. be.

[Brief explanation of the drawing]

Fig. 1 is an overall perspective view showing one embodiment of the input/output level measurement auxiliary device according to the present invention, Fig. 2 is a partially cutaway side view taken from the ■ arrow direction in Fig. 1, and Fig. 3 is an input/output level measurement auxiliary device. FIG. 4(a) is a circuit diagram showing the inside of the auxiliary device main body, and FIG.
b) is a perspective view showing the input/output level measurement auxiliary device attached to the clip, Figure 5(,) is an explanatory diagram showing the relationship between the input/output level measurement auxiliary device and the connector, and figure (b) is the input/output level measurement auxiliary device. FIG. 3 is a perspective view showing a state in which the output level measurement auxiliary device is attached to the connector. 1...Main body, 2...Connection part, 3...Test pin, 5
...Light emitter, 6...Selector switch, 11...Clip, 15.16...Clip pin, 17...Connector, 18...Connector pin.

Claims (1)

[Scope of Claims] 1. An input/output level measuring auxiliary device to be used by placing it over a clip having a connection terminal connected to each terminal of an electronic component and a plurality of pins connected to a measuring device, the device comprising: connection parts that can be connected to each other; and a plurality of test pins that can be connected to the respective connection parts and to which the measuring device can be connected;
An input/output level measuring auxiliary instrument characterized by comprising a light emitting body for checking the input/output level of each terminal of an electronic component, and a switching section for switching each light emitting body on and off. 2. The input/output level measurement auxiliary instrument according to claim 1, wherein the input/output level measurement auxiliary instrument is shaped to be inserted into a connector, and the connecting portion is configured to connect to a pin having substantially the same shape as a pin of a clip in the connector.