JP3008612U - Measuring probe - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a measurement probe that is easy to operate and has few measurement errors and measurement errors. [Constitution] In a measurement probe for performing measurement by bringing a measurement terminal 2 protruding from a tip of a case 1 into contact with a measurement point,
The measuring terminal 2 is movably supported in the case 1, and is urged in a projecting direction by an ammunition machine 4 provided in the case 1. The measuring terminal 2 comes into contact with the case 1 when the measuring terminal 2 is retracted. Since the contact spring 5 that forms the contact point is provided and can be operated with one hand, the operation is easy and the measurement can be performed while the operation terminal 2 is pressed against the measurement point, so that measurement error and measurement error can be reduced.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a measurement probe that facilitates measurement work.

[0002]

[Prior art]

 Conventional measuring instruments are equipped with measuring probes that come into contact with measuring points such as electrical equipment and electronic circuits to be measured. This measuring probe has a structure in which a measuring terminal made of a conductive material is provided at the tip of an insulating case that is formed in a cylindrical shape so that it can be easily gripped, and a measuring instrument is provided by a lead wire extending from the base end side of the case. It is designed to connect with.

When the measurement probe as described above is used for measurement, the measurement terminal is normally brought into contact with the measurement point so that the measurement point and the measurement terminal are electrically connected. The measurement may be performed by forming a circuit after bringing the measurement terminal into contact with the measurement point without electrically connecting the terminal and the measurement point. In such a case, conventionally, the slide switch or pushbutton switch built into the measurement probe was turned off in advance and the measurement terminal was connected to the measurement point, and then the slide switch or pushbutton switch was turned on to perform the measurement. ing.

[0004]

[Problems to be solved by the device]

 However, with this method, it is necessary to turn on the slide switch or push-button switch while the measurement terminal of the measurement probe is in contact with the measurement point, which may cause measurement errors or errors due to poor contact. There is. Further, since the switch operation is performed while the measurement probe is held, there are problems that both hands are required for the operation and the operation is complicated. The present invention has been made in order to improve such a conventional problem, and an object thereof is to provide a measurement probe which is easy to operate and which is less likely to cause measurement error or measurement error.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a measuring probe, in which a measuring terminal protruding from the tip of a case is brought into contact with a measuring point for measurement, and the measuring terminal is movably supported in and out of the case. In addition to being urged in the protruding direction by the provided ammunition, a contact spring is provided in the above-mentioned case, which comes into contact with the measurement terminal when it is retracted to form a conduction circuit.

[0006]

[Action]

 With the above configuration, when the measurement terminal is brought into contact with the measurement point and the case is pressed, the measurement terminal is retracted into the case, the measurement terminal and the contact spring come into contact, and a conduction circuit is formed. In addition, since it is possible to perform measurement with the measurement terminal pressed against the measurement point, measurement errors and measurement errors can be reduced.

[0007]

【Example】

 An embodiment of the present invention will be described in detail with reference to the drawings shown in FIGS. FIG. 1 is a side view of the measurement probe, and FIG. 2 is a sectional view of the same. In these figures, reference numeral 1 denotes a cylindrical case made of an insulating material, a measuring terminal 2 made of a conductor is projected on the tip end side, and a lead wire 3 is extended from the base end side.

The measuring terminal 2 has a rod-like shape, and a spring seat 2a is provided in a protruding manner at a position slightly closer to the tip end side than the middle part, and from the spring seat 2a to the base end side is inside the case 1. While being housed, the base end side is slidably supported in a small hole 1b of a partition wall 1a formed in the case 1. A bullet 4 made of a coil spring is interposed between the spring seat 2a and the partition wall 1a, and the measuring terminal 2 is biased in the projecting direction by the bullet 4.

On the other hand, inside the case 1, a contact spring 5 made of a leaf spring is provided. The contact spring 5 has a contact portion 5a which is curved in an arc shape at one end side, and an intermediate portion is fixed to a case by a fixture 6 so that the contact portion 5a is separated from the base end portion of the measuring terminal 2. 1 is fixed to the inner surface of the measuring terminal 2, and when the measuring terminal 2 is immersed against the ammunition 4 at the time of measurement, the base end portion of the measuring terminal 2 and the contact portion 5a come into contact with each other to make contact with the measuring terminal 2. The gap 5 is electrically connected. The lead wire 3 is soldered to the other end of the contact spring 5.

Next, the operation of the measurement probe will be described. In the measurement, the measuring probe is connected to a measuring device (not shown) via the lead wire 3, and in this state, the case 1 is gripped and the tip of the measuring terminal 2 is brought into contact with the measuring point. In this state, since the base end portion of the measuring terminal 2 and the contact portion 5a of the contact spring 5 are separated from each other as shown in FIG. 2, there is no conduction between the measuring terminal 2 and the contact spring 5.

Next, when the measurement is started, the case 1 is pressed toward the measurement point side. As a result, the measuring terminal 2 is retracted into the case 1 against the ammunition 4, so that the base end portion of the measuring terminal 2 and the contact portion 5a of the contact spring 5 come into contact with each other so that the distance between the measuring terminal 2 and the contact spring 5 is increased. Is conducted to form a conduction circuit, and measurement can be performed. Further, when the measurement is completed and the measurement terminal 2 is separated from the measurement point, the measurement terminal 2 is projected to the original position shown in FIGS. 1 and 2 by the action of the bullet 4.

Although a coil spring is used for the bullet 4 in the above embodiment, the same effect can be obtained by using an elastic body such as sponge or rubber as shown in FIG.

FIG. 4 shows another embodiment in which a coil spring is used as the contact spring 5, and a contact portion 5a 'is provided on one end side of the contact spring 5 composed of a coil spring, and this contact portion 5a' is provided. The other end side of the contact spring 5 is fixed to a partition wall 1c provided in the case 1 so that the measurement terminal 2 is separated from the base end of the measurement terminal 2. Are in contact with the contact portion 5a '.

[0014]

Effect of the Invention As described in detail above, the present invention enables a conduction circuit to be formed by pressing the case against the ammunition while the measurement terminal is in contact with the measurement point during measurement. As a result, it is no longer necessary to operate the slide switch or push button switch as in the past. This allows the measurement work to be performed with one hand, greatly improving the operability and forming a conductive circuit with the measurement terminals pressed against the measurement point, which enables highly accurate measurement without measurement errors or measurement errors. It will be possible.

[Brief description of drawings]

FIG. 1 is a side view of a measuring probe according to an embodiment of the present invention.

FIG. 2 is a sectional view of a measurement probe according to an embodiment of the present invention.

FIG. 3 is a sectional view of a measuring probe according to another embodiment of the present invention.

FIG. 4 is a sectional view of a measurement probe according to another embodiment of the present invention.

[Explanation of symbols]

 1 case 2 measuring terminal 4 bullet 5 contact spring

Claims (3)

[Scope of utility model registration request] 1. A measuring probe for measuring by contacting a measuring terminal 2 protruding from the tip of a case 1 with a measuring point, and the measuring terminal 2 is movably supported in the case 1 and provided in the case 1. And a contact spring 5 which is urged by the ammunition machine 4 in the projecting direction and which contacts with the measurement terminal 2 when the measurement terminal 2 is retracted to form a conduction circuit. 2. The measuring probe according to claim 1, wherein the bullet 4 is formed of a coil spring or an elastic body. 3. The measuring probe according to claim 1, wherein the contact spring 5 is formed of a leaf spring or a coil spring.