JP2809894B2 - Measurement terminal unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measuring terminal unit used for measuring electric characteristics (resistance, voltage, current, etc.) of an electronic component such as a chip resistor.

[0002]

2. Description of the Related Art A conventional general measuring terminal unit is shown in FIG.
Shown in The unit 10 includes a base 11 having a square planar shape, and a pair of substrate holders 1 attached to the base 11.
2 and a substrate 13 fixed to the substrate holder 12.
A measuring terminal 14 is attached to one end of the substrate 13, and a lead 15 connected to the measuring terminal 14 and connected to a measuring instrument (not shown) is attached to the other end.

[0003] In order to measure the resistance value of a chip resistor, for example, as shown in FIG.
The measurement terminals 14 are used in contact with the 0 electrode 23, respectively. Note that the chip resistor 20 shown here is
1, a resistor film 22 provided on a substrate 21, and a resistor film 2
2, and a protective sheath 24 covering the resistor film 22.

[0004]

The unit 10 as described above is assembled by connecting the measuring terminals 14 and the lead wires 15 to the substrate 13 by soldering or the like. Therefore, a unit having a large number of measuring terminals 14 for measuring the electrical characteristics of a large number of electronic components at one time has a disadvantage that it takes time to assemble. In particular, since electronic components such as chip resistors are small in size, each pair of measuring terminals 14 is set so that all measuring terminals 14 correspond to the electrode width of the electronic component.
The adjustment work for aligning the tips of the dies at the same intervals requires a great deal of trouble and is a major factor in prolonging the assembly time.

In the unit 10, while the measurement terminal 14 is in contact with the electrodes of the electronic component many times, the tip of the measurement terminal 14 gradually wears and the tip becomes misaligned.
In this case, since the measurement terminal 14 contacts the electrode non-uniformly, the contact pressure is not uniform and an error occurs in the measured value. Further, in the conventional unit 10, the measurement terminal 14 is usually fixed to the substrate 13, so that the electrode and the measurement terminal 14 are fixed.
If a foreign substance is present between the tip and the tip, poor contact is likely to occur, which also hinders accurate measurement.

Accordingly, it is an object of the present invention to provide a measuring terminal unit which can be manufactured easily and inexpensively, and which can reduce a measuring error as much as possible.

[0007]

A measuring terminal unit according to the present invention for achieving the above object has a base plate, a plurality of rod-shaped measuring terminals for contacting tips of electrodes of an electronic component, and a movable terminal unit. And a pair of terminal holders having fixing means for fixing the plurality of rod-shaped measuring terminals to the base plate in an oblique direction, wherein the fixing means for the pair of terminal holders comprises the plurality of terminal holders. It is characterized in that the distance between the tips of the rod-shaped measurement terminals is individually adjustable and fixed.

In the unit of the present invention, the measuring terminal has a rod shape longer than the measuring terminal of the conventional unit, and the measuring terminal is attached to the terminal holder obliquely with respect to the base plate. When the tip of the measurement terminal is brought into contact with the measurement terminal, the measurement terminal bends in accordance with the applied force, and a contact pressure required for measurement is obtained. Even if the measuring terminal is worn and shortened, the necessary contact pressure can be secured by moving the terminal holder.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a measuring terminal unit according to the present invention will be described based on embodiments. FIG. 1 shows one embodiment. The unit 1 includes a base plate 2 having a square planar shape, a pair of terminal holders 3 and 4 movably attached to the base plate 2 in the direction of an arrow, and bolts and the like (not shown). ), And has long rod-shaped measurement terminals 5 and 6.
The measuring terminals 5 and 6 are fixed to the base plate 2 in an oblique direction, and the distance between the tips of the measuring terminals 5 and 6 can be adjusted by operating a bolt or the like according to the width of both electrodes of the electronic component. it can. Further, the measuring terminals 5 and 6 are connected to measuring cables 7 and 8, respectively. At the time of measurement, the measuring cables 7 and 8 are connected to a measuring instrument (not shown).

Such a unit 1 has measuring terminals 5 and 6
Are fixed to the terminal holders 3 and 4 with bolts or the like, so that even if there are a large number of measurement terminals, the adjustment work for aligning the measurement terminals is simple, and the assembling time is not as long as in the past. The following describes how to measure the resistance value of a chip resistor as an electronic component using the unit 1 as an example.
The unit 1 shown in FIG. 2 has nine pairs of measurement terminals 5 corresponding to a large number of resistors 31 (nine in FIG. 2) provided on a substrate 30.
6. Of course, the tips of the measuring terminals 5 and 6 of each pair are arranged at regular intervals. The unit 1 is lowered from above the substrate 30, and the measurement terminals 5 and 6 of each pair are brought into contact with the electrodes 32 and 33 of each resistor 31 (see FIG. 1).

At this time, in FIG. 3 showing a part of the contact state in an enlarged manner, the base plate 2 is moved downward by a certain force F.
If it presses, the measuring terminal 5 will bend and contact the electrode 32. Due to the contact form of the measuring terminal 5, a necessary contact pressure is obtained at the time of measurement, and a measurement error does not occur. Also, measuring terminal 5,
When the tip of 6 wears out and shortens with use,
By moving the terminal holders 3 and 4 in a direction approaching each other, the tips of the measuring terminals 5 and 6 may be aligned at predetermined intervals. At the same time, if the force for pressing the measuring terminals 5 and 6 against the electrodes 32 and 33 is increased, the contact pressure of the measuring terminals 5 and 6 before the abrasion can be ensured.

Further, the tips of the measuring terminals 5 and 6 and the electrodes 32,
Even if a small foreign substance is interposed between the measuring terminals 5 and 6, the measuring terminals 5 and 6 that have received the force F slightly bend while their tips are in contact with the electrodes 32 and 33, so that the small foreign substance can be easily removed. And a normal measurement can be performed.

[0013]

The measuring terminal unit of the present invention has the following effects because it is configured as described above. (1) Since the terminal holder itself to which the plurality of rod-shaped measurement terminals are fixed can be moved, the interval between the tips of the entire rod-shaped measurement terminals can be adjusted, and the adjustment time for aligning the ends of the measurement terminals can be adjusted. And assembly time can be reduced,
The assembly cost of the measuring terminal unit can be reduced. (2) Since the positions of the tips of the individual rod-shaped measurement terminals can be adjusted by the fixing means, variations in the interval between the tips due to wear of the tips of the measurement terminals fixed to the same terminal holder can be finely adjusted, and the measurement terminals due to wear can be finely adjusted. A constant contact pressure can always be obtained regardless of the length of the contact. Therefore, not only no measurement error occurs, but also the life of the measurement terminal is greatly extended. (3) Even if there is a foreign substance between the measuring terminal and the electrode, the measuring terminal bends and moves slightly in parallel, so that the foreign substance can be easily removed, so that measurement abnormality due to the foreign substance hardly occurs. .

[Brief description of the drawings]

FIG. 1 is a side view showing a measuring terminal unit of the present invention and an example of its use.

FIG. 2 is a partially transparent plan view of the unit shown in FIG. 1;

FIG. 3 is an enlarged view showing a part of a contact state between a rod-shaped measurement terminal and an electrode in the unit of FIG. 1;

FIG. 4 is a side view showing a conventional measurement terminal unit and an example of its use.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Measurement terminal unit 2 Base plate 3, 4 Terminal holder 5, 6 Rod-shaped measurement terminal 7, 8 Measurement cable

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-105079 (JP, A) JP-A-51-32181 (JP, A) JP-A-3-12172 (JP, U) JP-A-63 95187 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) G01R 1/073 G01R 31/26 H01L 21/66 G01R 27/02

Claims (1)

(57) [Claims] 1. A tip is brought into contact with a base plate and an electrode of an electronic component.
Multiple rod-shaped measurement terminals to be moved and movable to the base plate
Attached to the base plate
Pair of terminal holders having fixing means for fixing obliquely with respect to
And a means for fixing the pair of terminal holders, wherein the plurality of rod-shaped measurement
A measuring terminal unit characterized in that the distances between the terminal ends are individually adjustable and fixed .