JPS6236133Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a ground adapter for an electric probe, and more particularly to a ground adapter for an electric probe in which the ground pin is elastically displaceable.

A so-called measurement probe is sometimes used in a measuring instrument such as an oscilloscope that measures electrical parameters such as voltage. In this case, there are various ways to connect the ground terminal, but some use a ground adapter 10 as shown in FIG.

This adapter 10 has a ground pin 13 supported in a case body 11 so as to be elastically displaceable by a coil spring 12. Also, in a part of the case body 11, there is a through hole 14 for inserting and fixing the probe 20 from the direction of arrow A, for example, as shown in FIG.
has. Here, one end 1 of the spring 12
5 extends into the through hole 14 and forms a contact that enables electrical contact with the ground side of the probe when the probe is inserted. Also, since this end 15 presses the probe in the direction of arrow B,
This ensures that the probe is held securely.

According to such a ground adapter 10, it is more suitable for high frequency measurements than when using a ground lead.
In addition, there is no inconvenience such as getting in the way of routing, and depending on the distance between the probe tip and the ground point,
Due to the action of the spring 12, appropriate contact is possible and desirable.

However, since the structure is complicated and the number of parts is large, it is not economical and lacks generality.

This invention was made in an attempt to eliminate the above-mentioned drawbacks of the conventional technology, and the purpose is to provide a ground adapter for electrical probes that is structurally simple, highly economical, and has excellent performance. shall be.

To achieve this purpose, according to this invention,
A ground pin that makes contact with the ground side of the object to be measured;
In this ground adapter for an electric probe, the ground adapter has a main body that supports the ground pin and has a through hole provided for inserting and fixing a probe for performing desired electrical measurements, wherein the main body is made of a conductive elastic material. do it like this.

Embodiments of this invention will be described below with reference to the accompanying drawings.

FIG. 3 shows an embodiment of this invention.
The adapter 30 has a metal ground pin 31 and a main body 3.
2. Tip 31A of earth pin 31
has a conical shape to enable contact with a predetermined ground location. This tip 31A has an extension portion 31B.
are connected. This extended portion 31B is the main body 32
It protrudes from the ground, and its length is usually preset according to the required distance to the grounding point in relation to the probe.

Wide brim portion 31 connected to this extended portion 31B
C is formed. This wide-brimmed portion 31C has a cylindrical shape concentric with the elongated portion 31B, and its radius is larger than that of the elongated portion 31B.

According to the embodiment of this invention, such a metallic earth pin 31 has a main body 32 made of a conductive elastic material such as conductive rubber, and a wide brim portion 31C and a part of an elongated portion 31B. It is buried and fixed. The main body 32 has a through hole 36 in the block 35 on the side where the earth pin 31 is not provided, in which a probe 20 for performing desired electrical measurements, as shown in FIG. 2, for example, is inserted and fixed.

The tip portion 21 of the probe 20 is pointed in the direction of arrow D in FIG.
The earth side conductive portion 22 connected to this portion 21 is held by the side surface 36A of the through hole 36, and since the main body 32 is made of a conductive material, the earth pin 31 and the probe 20 can be electrically connected at the same time. achieved.

Alternatively, as shown in FIG. 4, the earth pin 41 and the main body 42 may be integrally molded from a conductive elastic material.

According to each of the above embodiments, the earth pin 31 can be displaced within the limits of elastic deformation of the main body 32, and the earth pin 41 can be displaced within the limits of the elastic deformations of the main body 42 and the earth pin 41. In particular, it is extremely advantageous in that the ground pins 31, 41 can be displaced in a direction other than the direction in which they extend.

According to this invention, by configuring as described above, the number of parts can be reduced by eliminating the need for coil springs, etc., and the structure of the earth pin can be extremely simplified, thus making it possible to reduce the number of parts supporting the earth pin on the main body side. No particular configuration is required for this purpose. Therefore, overall economic efficiency is extremely high. In addition, since the earth pin has a large degree of freedom in elastic displacement, it is possible to easily and quickly respond to various measurements, making it possible to provide an extremely excellent electrical probe adapter.

Incidentally, in the conventional example shown in FIG. 1, the same effects as described above can be expected by using a conductive elastic material as the main body. However, it is slightly inferior to the above-mentioned method in terms of reducing the number of parts.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway sectional view of a conventional ground adapter, Fig. 2 is an explanatory diagram illustrating an electric probe that can be used with this invention, and Fig. 3 is a partially cutaway sectional view of an embodiment of this invention. FIG. 4 is a diagram illustrating a modification of the embodiment shown in FIG. 3. 10, 30...Earth adapter, 11...Body, 12...Spring, 13...Earth pin,
14...Through hole, 20...Probe, 31...Earth pin, 32, 35...Body, 36...Through hole, 41...Earth pin, 42...Body.

Claims (1)

[Claims for Utility Model Registration] (1) A main body having an earth pin that makes contact with the earth side of the object to be measured, and a through hole that supports this earth pin and is provided to insert and fix a probe for performing desired electrical measurements. 1. A ground adapter for an electrical probe, comprising: a main body made of a conductive elastic material; (2) Utility Model Registration The adapter according to claim 1, wherein the earth pin is a metal pin partially embedded in the main body. (3) Utility Model Registration The adapter according to claim 1, wherein the ground pin is made of a conductive elastic material protruding from the main body. (4) Utility Model Registration The adapter according to claim 1, wherein the ground pin is a metal pin supported so as to be elastically displaceable.