JPH0418219Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention has a method in which the hook-shaped portion at the tip of the probe is locked when measuring voltage using the measurement probe on the surface of a printed wiring board on which surface-mounted devices are mounted. This invention relates to a jumper chip that is easy to measure.

[Conventional technology]

As shown in FIG. 5, the conventional jumper chip 4 consists of legs 14, 14 extending downward from both ends of a flat bridge section 13.

On the other hand, two conductive bands 6, 6 arranged in parallel are formed on the wiring board 5, and these conductive bands 6, 6
The legs 14, 14 of the jumper chip 4 are respectively soldered and electrically connected.

Further, a conductive band 7 is formed between both conductive bands 6, 6 of the wiring board 5, and the bridge portion 13 of the jumper chip 4 jumps over this conductive band 7. (Utility Model Application No. 49-70459) Since the jumper chip 4 is entirely a conductor and is exposed on the wiring board, it can be When checking whether proper voltage and current values are obtained during failure analysis, or when adjusting other circuit constants while checking the output voltage, etc., use the measurement probe 9 to touch the side of the jumper chip 4. Often used.

Using the above jumper chip 4, the voltage value,
When measuring the current value, a measuring probe 9 as shown in FIG. 4 is used. This probe 9 is provided with a hook-shaped portion 12 on the lower side, and the hook-shaped portion 12 is biased upward, and the hook-shaped portion 12 is moved up and down by a collar portion 10 provided on the probe 9. . When no force is applied to the flange 10, the hooked portion 12 is housed within the holder 11 and the flange 10 is closed.
When 0 is pushed down, the hooked portion 12 is designed to protrude. When measuring voltage and current values, push the collar 10 downward to make the hook 12 protrude and hook it to the part to be measured (jumper chip 4), and then release the force from the collar 10. The hook-shaped part 12 is pulled upward, and the object to be measured is held in the holder part 1.
1 and the hooked portion 12,
Measurement is performed in this state.

[Problem that the invention attempts to solve]

When measuring the jumper tip 4 in this way, the width direction of the jumper tip 4 is larger than the horizontal width of the hooked portion 12, as shown in FIG. When hooked, there is a drawback that only one point of the tip of the hook-shaped portion 12 makes contact, and the contact tends to become unstable. Also, depending on the height of the foot of the jumper chip 4, the hooked portion 12 may be attached to the jumper chip 4.
There was also a drawback that the signal came into contact with the conductive band 7 below which it had jumped over and discarded a signal that was not intended for purpose. Further, the shape of the jumper chip 4 must be the same as the standard dimensions of a normal chip resistor in order to be automatically mounted, so even if it is attempted to make the width of the jumper chip 4 thin enough to fit within the hook-shaped portion 12, it is not possible. The object of the present invention is to provide a jumper chip which eliminates the above-mentioned drawbacks and allows accurate measurements while maintaining stable contact.

[Means for solving problems]

In order to solve the above problem, when using a measuring probe having a hook-like portion at the tip, a jumper tip is arranged so that the hook-like portion 12 of the measuring probe comes into contact with both ends. A recess is provided in which the hook-shaped portion is positioned.

[Effect]

The above technical means works as follows.

Since the measurement probe is positioned and stabilized and can sufficiently grip the jumper chip, the hook-shaped part 12 does not come into contact with the conductive band 7, and stable and correct current and voltage values can be measured.

〔Example〕

Examples of the present invention are shown below in Figures 1, 2, and 3.
This will be explained using figures.

As shown in FIG. 1, the jumper chip 1 is made by cutting a band-shaped metal plate into a beveled shape.
It consists of legs 15, 15 extending downward from both ends of the board, and the legs 15, 15 are electrically connected to conductive bands 6, 6 on the wiring board 5 by a method such as soldering. and jumps over the conductive band 7 between the conductive bands 6, 6. Bridge part 19 of jumper chip 1
Arc-shaped recesses 8, 8 are provided on both sides. The present invention is constructed as described above, and its operation will now be explained.

The bridge portion 19 of the jumper chip 1 is held between the hook portion 12 and the holder 11 so that the hook portion 12 of the measuring probe 9 is attracted to the bridge portion 19 of the jumper chip 1. At this time, since the hooked part 12 is expanding on the holder 11 side, the two contact positions between the hooked part 12 and the bridge part 19 are at the narrowest part formed in the bridge part 19 by both the recesses 8, 8. It will be moved and positioned. Therefore, the hooked portion 12 does not wobble, and the concentrated contact resistance between the hooked portion 12 and the jumper chip 1 is reduced, allowing stable and accurate measurement.

To explain another embodiment of the present invention, as shown in FIG. 2, a jumper chip 2, which is formed by cutting a band-shaped metal plate and performing a bending process, extends downward from both ends of a flat bridge section 20, and is rounded and squeezed. It consists of two legs 16, 16. In this case as well, as in the case of FIG.
6 and 16 are electrically connected to the conductive bands 6 and 6 on the wiring board by soldering or the like, and the conductive band 7 between the conductive bands 6 and 6 is skipped. Arc-shaped recesses 8, 8 are provided on the sides of the jumper chip 2. The present invention is constructed as described above, and its operation will now be explained.

The hook-shaped portion 12 of the measurement probe 9 is pulled onto the bridge portion 20 of the jumper chip 2, and the bridge portion 20 is held between the hook-shaped portion 12 and the holder 11. At this time, since the hook-shaped part 12 is expanded on the holder 11 side, the two contact positions between the hook-shaped part 12 and the bridge part 20 are determined by the two recesses 8, 8.
It will be moved and positioned at the narrowest part formed in the area. Therefore, the hooked portion 12 does not wobble, and the hooked portion 12 and the jumper tip 2
The contact resistance between the two is small, allowing for stable and accurate measurements.

To explain yet another embodiment of the present invention, as shown in FIG. 3, a jumper chip 3 made by cutting a band-shaped metal plate into a beveled shape has leg portions 17 extending downward from both ends of a flat bridge portion 21. , 17, the leg portions 17, 17 are electrically connected to the conductive bands 6, 6 on the wiring board 5 by soldering or the like, and the conductive band 7 between the conductive bands 6, 6 is jumping over. A triangular recess 18 is provided on one side of the jumper chip 3. The operation of the present invention constructed as described above will now be explained.

The hook-shaped portion 12 of the measurement probe 9 is pulled onto the bridge portion 21 of the jumper chip 3, and the bridge portion 21 is held between the hook-shaped portion 12 and the holder 11. At this time, since the hooked part 12 is expanding on the holder 11 side, the two contact positions between the hooked part 12 and the bridge part 21 are moved to the narrowest part formed in the bridge part 21 by the recessed part 18. The position will be determined by Therefore, the hooked portion 12 does not wobble, the concentrated contact resistance between the hooked portion 12 and the jumper chip 3 is reduced, and stable and correct measurements can be made.

In each of the above embodiments, the jumper chips 1,
Although circular arcs and triangles are used as the recesses 8 and 18 on the sides of 2 and 3, the recesses 8 and 18 may have any shape as long as the desired purpose can be achieved, and any number of recesses can be used as long as the desired purpose can be achieved. It may be one piece. Further, the structure of the jumper chip may be of any structure as long as the purpose can be achieved.

[Effect of idea]

As explained above, when using a measurement probe having a hook-shaped portion at the tip, in a jumper chip in which the hook-shaped portion of the measurement probe is brought into contact with both sides, the hook is attached to at least one of the ends. Since the side view probe is positioned by the recess, the probe does not wobble and the concentrated contact resistance between the measurement probe and the jumper chip is reduced, allowing stable and accurate measurements. Moreover, since the dimensions are the same as standard chips, it has the advantage of being compatible with automatic mounting.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of an embodiment of the present invention; Fig. 2;
FIG. 3 is a perspective view of another embodiment of the present invention, FIG. 4 is a perspective view of a measuring probe, and FIG. 5 is an explanatory diagram of a conventional example. 1, 2, 3... Jumper chip, 5... Printed wiring board, 6, 7... Conductive band, 8, 18...
Recessed portion, 9...Measurement probe, 12...Hooked portion,
15, 16, 17...foot.

Claims (1)

[Scope of utility model registration request] When using a measurement probe having a hooked portion at the tip, the jumper chip is configured such that the hooked portion of the measurement probe comes into contact with both ends, and a recessed portion for positioning the hooked portion is provided at at least one of the ends. A jumper chip that is characterized by: