JP2001343398A - Magnet probe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a probe capable of eliminating an unreasable posture of a user, allowing latitude in safety feeling, and raising the efficiency of a measuring work, by enabling the frequently moving probe instantly to be attracted in the measuring work. SOLUTION: In this probe, a magnet 1 is installed on the head of a contact body 7, and a contact bar 2 penetrates its center hole. The probe is characterized by installing a connection ring 10 to which a lead wire 6 is connected inside a handle rod 5, installing also a pressing coil spring 4, and installing an internal thread 9 connecting to an external thread of the contact body 7 on the left head.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention connects a jumper wire or the tip of a measuring lead wire of an electric measuring instrument suitable for movement,
The present invention relates to a magnet probe that is attracted to an electric component terminal.

[0002]

2. Description of the Related Art A tester frequently used in a portable measuring instrument frequently moves a probe during operation and presses it against a component terminal to search for a failed component due to a measurement operation or a repair operation. The insulation resistance meter has a structure in which the grounding-side lead wire is inserted into the negative terminal of the live part or the ground terminal with a crocodile clip or the like. In these measuring instruments, the other probe sometimes did not reach the measuring point during use, or the crocodile clip came off, and it was sometimes difficult. At times, they had to connect separately provided extensions or work with the help of others.

[0003]

As a conventional measuring method, when a positive R phase and a negative S phase exist in the operation circuit, the S lead is always in contact with the black lead contact rod of the tester as the S line as a common line. However, it was necessary to find a positive existing part. At that time, the red lead contact rod often does not reach the component to be measured, and the S-phase black lead wire contact rod side must be removed again. Therefore, the present invention provides a near field S so that the black lead contact rod can be easily removed and the red lead contact rod can be moved anywhere again.
The phase is found and adsorbed instantaneously, and the red lead contact rod can be easily moved. In addition, the crocodile clip on the ground side of the insulation resistance meter also takes time because the wire is short in the control panel and the bolt is too large to fit. The present invention uses the black lead side (or the ground side) so that any bolt that is attracted to the magnet can be attracted near the terminal of the measuring component, eliminating the unreasonable posture and providing sufficient safety awareness for the measurement work. Can provide a probe that improves efficiency.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to improve the above-described difficult measuring operation by bolting a component terminal to be attracted to a magnet, or bolting a component, or coating an iron plate. The probe is adsorbed to the peeled portion to keep the electrical conduction. The contact rod of the present invention
A stop is provided on the handle bar side, which passes through the center hole of the magnet from inside to outside. A push coil spring is provided at the back of the stopper so as to maintain a force relationship with a magnet that does not fall off the probe during suction.

[0005]

The embodiments of the present invention will be described below. At the left end of the contact body 7, a cylindrical magnet 1 is provided with a hole at the center. Further, at the right end, a male screw 8 is cut as a connecting portion of the handle bar 5, and a hole having the same diameter as the magnet 1 is opened from the right end to the left end. The contact rod 2 has a bar-shaped stopper 3 at the left end and a ring-shaped stopper 3 at the right end, and the diameter thereof is a diameter that smoothly enters the female screw 9. The handle bar 5 is formed in a pipe shape, has a female screw 9 cut inside the left end, and has a space for accommodating the push coil spring 4 therein. A connection ring 10 is provided inside the right end of the handle bar 5 for receiving the pressing coil spring 4 and for electrical contact. The right side of the connection ring 10 has a diameter small enough to pass the lead wire 6. Both the contact body 7 and the handle bar 5 are made of vinyl made of an insulating material.

[0006]

Embodiments of the present invention will be described below. With the handle bar 5 of the present probe held in hand, the contact bar 2 is applied to the electric component terminal (or the one to which the magnet is attracted), and the handle bar 5 is pressed against the component as it is. The contact body 7 hits the component terminal, the probe is attracted by the force of the magnet 1, and the hand can be released as it is. Mainly for voltage and continuity measurement work, the user tended to hold the measuring instrument main body and one side probe with the left hand and hold the other probe with the right hand. In the present invention, one side probe can be sucked and released as shown in Fig. 3B, so that a wide range of components can be measured by holding the measuring instrument body in the left hand and holding the other probe in the right hand as shown in Fig. 3C. You can improve your measurement work abilities with a relaxed posture and sufficient safety awareness. For example, when measuring the operation of the various limit switches between the control panel and the various limit switches by the plant, this probe can be adsorbed for measurement and inspection without disconnecting the operation wire to the connection terminal of the limit, and emits other sounds or light. It can be connected to the device etc. as a single item (jumper wire etc.), and the measurement work becomes smooth. In the case of earth leakage measurement using an insulation resistance meter, as shown in Fig. 3A, the ground side probe is attached to the earth terminal bolt (part support bolt or the peeled portion of the paint), and the measurement part can be selected. Becomes possible.

[0007]

According to the present invention, FIG. As shown in part B,
Since the probe can be kept released, the work becomes easier physically, the safety consciousness can be afforded, and the measurement work can be more efficient. In addition, it is possible to quickly absorb the electric component terminal, which has a large exposed portion of the charging part, without having to tighten the tightening bolt, thereby achieving a wide variety of measurements.

[Brief description of the drawings]

FIG. 1 is a side sectional view of the present invention.

FIG. 2 is an exploded view of the present invention.

FIG. 3 is a diagram illustrating a measurement operation according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Magnet 2 Contact bar 3 Stopper 4 Push coil spring 5 Handle bar 6 Lead wire 7 Contact body 8 Male screw 9 Female screw 10 Connection ring

Claims (3)

[Claims] 1. An electric component terminal (or a magnet attracted)
Is provided, and a magnet which is further directly contacted by a pushing operation is provided. 2. The contact rod passes through the center hole of the cylindrical magnet and is prevented from protruding inside the main body, and a disc-shaped stopper is provided as a receiving body of the pressing coil spring. 3. The magnet maintains an appropriate force relationship with a pressing coil spring which does not fall off during adsorption. When the probe is detached from the terminal, the contact rod protrudes from the center hole of the magnet due to the force of the pressing coil spring, and returns to the normal measurement state.