JPH0633426Y2 - Measuring probe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a measurement probe.

[Technical background of the invention] As a suitable method for measuring the resistance value of a resistor to be measured with high accuracy, a four-terminal method in which a current terminal and a voltage terminal are separately provided is well known.

The measuring probe used in the four-terminal method includes a clip structure type as well as a pin structure type. The clip structure type measuring probe is shown in FIG. 1 as an embodiment of the present invention. Similar to the above, many are formed by fitting a pair of casings to each other.

By the way, in the case of a structure in which a pair of casings are fitted to each other in this way, it is necessary to take measures to prevent the fitting parts from coming off and then disassembling each other after fitting. . For this reason, conventionally, the casing after fitting is covered with an insulating elastic member such as rubber, and the contraction force is used to prevent the fitting part from coming off, as well as a pair of casing support shafts. By placing a spacer made of synthetic resin or the like in the internal space located at the mating location, the movement in the disengagement direction is restricted and the disengagement is prevented, or a substantially V-shape is formed. There is one in which a bent leaf spring is fitted into the internal space located at the fitting position to restrict the movement in the detaching direction to prevent the detachment.

[Problems to be Solved by the Invention] Among the conventional measurement probes having the above-described structure, the one having a pair of casings covered with an insulating elastic member such as rubber has an insulating elastic member. Since it also functions as a spring, even if it is possible to apply a biting force to each other, the cost of the clip is inevitably high because the clip is entirely made of metal. Also, in the case of a structure in which a spacer is interposed or a leaf spring is mounted, it is necessary to apply a biting force between the clip parts, so a coil spring must also be used together, and the number of parts However, the cost was high and the workability was poor. In addition, the intervening parts such as the spacers and the leaf springs have a problem that the wiring work of the cords in the pair of casings having a relatively small space is complicated.

[Object of the Invention] The present invention has been made in view of the above points, and an object thereof is to prevent a pair of casings formed by fitting from being disengaged from each other, and prevent the fitting portions from coming off. An object of the present invention is to provide a measuring probe that can reduce the number of parts and improve workability during assembly by simultaneously activating the biting force.

[Means for Solving the Problems] In order to achieve the above object, the present invention has the following configuration.

That is, this invention has a clip portion and a grip portion,
It consists of a pair of casings with a convex part on one side and a concave part on the other side. The convex part of one casing is the concave part of the other casing, and the concave part of one casing is the convex part of the other casing. Each of them is simultaneously fitted from one side direction, and by interposing an intervening piece between the fitting portions, the casings are opposed to each other and pivotally attached, and a clamping force is applied between the clip portions. In the measuring probe, the intervening piece is a pair of winding parts arranged between the fitting parts and a pair of ends extending from the start end and the end of the winding part in a substantially V-shape. It is characterized in that it is integrally formed with the supporting arm portion and the pair of supporting arm portions are expanded so that the tip end portions thereof are wider than the width of the winding portion.

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

FIG. 1 shows an example of the overall configuration of the present invention. A pair of casings 1 and 1 each have a clip portion 2 and a grip portion 3, and they are mutually connected by using an electrical insulator such as plastic. Are integrally formed to have the same shape. These casings 1 are provided with a convex portion 6 on one side wall 4 and a concave portion 7 on the other side wall 5, and the convex portion 6 of one casing 1 is provided with the other casing 1
The concave portion 7 and the concave portion 7 of the one casing 1 are formed so as to be pivotally attached in a mutually facing positional relationship by simultaneously fitting with the convex portion 6 of the other casing 1 from one side direction. There is. In this case, the convex portion 6 and the concave portion 7 may have a shape such that they do not rattle with each other and can be slidably fitted to each other.
May be formed as a circular protrusion and the concave portion 7 is formed as a circular hole, or the concave portion 7 may be formed as a round hole opened inward.

Each of the convex portion 6 and the concave portion 7 thus formed is pivotally attached as a fitting portion 8 as shown in FIG.
The pair of casings 1 and 1 includes a winding portion 10 and a pair of supporting arm portions 11 and 1 extending from a start end and an end of the winding portion 10, respectively.
An intervening piece 9 having 1 and 1 is attached. Of these, the winding part 10 is an internal space formed between the fitting parts 8.
By arranging it in 13, it has a function as a movement restricting piece for restricting the movement of the casings 1 after pivotal attachment in the disassembly direction. In addition, one of the pair of supporting arms 11, 11 supports the holding portion 3 of the casing 1 and the other supporting arm 11 extends the holding portion 3 of the other casing 1, respectively. Each of the supporting arms 11 has a substantially V-shape from the starting end and the terminating end of the winding part 10 so that the biting force can be applied between the clip parts 2 by pressing the It is formed by stretching in the presenting direction. in this case,
When each of the support arms 11 is provided with a bent portion 12 bent inward at each of its tip ends, the support arm 11 can be more easily mounted in the casing 1. . Further, the supporting arms 11 are formed such that the tip ends of the supporting arms 11 are widened to be wider than the width of the winding portion 10. Can press the respective casings 1 in mutually opposite directions, and the casing 1 and the winding portion 10
It is possible to more reliably prevent mutual movement in the disassembly direction. Therefore, the internal space formed between the fitting portions 8
The interval of 13 is a, the width of the winding part 10 in the interposition piece 9 is b, and the supporting arm part is
11 Let c be the maximum width of each other, and
They are formed to have a relationship of a <c.

In each of the casings 1 thus formed, the terminal fittings 14 are arranged on the inner surface side of the clip portion 2, and the cords 15 in which the core wires 16 are connected to the metal terminals 14 are arranged along the guide ribs 17 in the casing 1. Are arranged respectively.

Reference numeral 18 in the drawing denotes a cord fixing member, and 19 denotes a connector for connecting to an ohmmeter main body (not shown).

Next, the assembly of the measuring probe of the present invention will be described.

That is, the pair of casings 1, 1 are arranged so as to face each other, and the convex portion 6 of one casing 1 is arranged from one side direction thereof.
Is the recess 7 of the other casing 1 and the one casing 1
The concave portion 7 of the other casing and the convex portion 6 of the other casing 1 are assembled so as to be fitted to each other. After combining in this way, the interposition piece 9 is mounted via the internal space 13 formed between the fitting portions 8 of the casing 1. In this case, the interval of the internal space 13 formed between the fitting portions 8 is a, and the interposition piece 9 is
The width of the winding portion 10 in b is the maximum width between the supporting arm portions 11 is c
Since each of them is formed so as to have a relationship of b <a <c, even if the casings 1 try to move in the disassembling direction, the winding portion 10 restricts the movement thereof. It is possible to prevent disassembly. Further, since the supporting arm portions 11 can also press the casings 1 in the opposite directions, the disassembly can be prevented more reliably. Furthermore, since the supporting arm portions 11 of the interposition piece 9 are formed in a substantially V-shape, the grip portions 3 of the casing 1 can be pressed in the directions of expanding each other. A biting force can be applied between the clip portions 2 having the fitting portion 8 as a spindle. Therefore, the measuring probe can be formed by reducing the number of parts in the casing 1.

[Effects of the Invention] As described above, according to the present invention, by mounting the interposition piece in the pair of pivotally mounted casings, it is possible to prevent the disassembly of the interposition piece and to provide a sufficient gripping force to the clip portion. Since it can be urged, not only can the number of parts be reduced to reduce costs, but also workability at the time of assembly such as wiring of cords can be improved, which is an excellent practical It is possible to exert an effect.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the embodiment shown in FIG. 1, and FIG. 3 is A in FIG.
FIG. 4 is a front view showing a structural example of an intervening piece attached to the measuring probe of the present invention, taken along the line A. 1 ... Casing, 2 ... Clip part, 3 ... Gripping part, 4,5 ... Side wall, 6 ... Convex part, 7 ... Recessed part, 8 ... Fitting part, 9 ... Interposed piece, 10 ... … Winding part, 11 …… Support arm part, 12 …… Bend part, 13 …… Internal space, 14 …… Terminal fitting, 15 …… Cord, 16 …… Core wire, 17 …… Guide rib, 18 …… Cord Fixed member, 19 ... Connector

Claims (1)

[Scope of utility model registration request] 1. A pair of casings having a clip portion and a grip portion, one side of which is provided with a convex portion and the other side of which is provided with a concave portion. The concave portion and the concave portion of one casing are simultaneously fitted with the convex portions of the other casing from one side direction respectively, and by interposing an intervening piece between the fitting portions, the casings are opposed to each other and pivotally attached. In the measurement probe that applies a biting force between the clip portions, the intervening piece is
A winding part disposed between the fitting parts and a winding end extending from a starting end and a terminating end of the winding part in a substantially V-shape.
A probe for measurement, characterized in that it is integrally formed with a pair of supporting arm portions, and that the pair of supporting arm portions are expanded so that their tip portions are wider than the width of the winding portion.