CN2493943Y

CN2493943Y - Tester structure for printed circuit board

Info

Publication number: CN2493943Y
Application number: CN 01231690
Authority: CN
Inventors: 吴志成; 杨昌国
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-07-23
Filing date: 2001-07-23
Publication date: 2002-05-29
Anticipated expiration: 2011-07-23

Abstract

The construction of a functional tester for printed circuit board comprises a pin plate, a plurality of probes, a plurality of wires and a switchboard; the pin plate is provided with pinholes; each probe comprises a cylinder, an elastic cell and a pin, the elastic cell is provided inside the cylinder, the pin inserts in the cylinder and contacts with the elastic cell, the cylinder inserts in the pinholes of the pin plate to make the pin contact with the under-test point of the printed circuit board; a plurality of wires link to the cylinder of the probe; a switchboard is arranged above the pinboard on which the holes are provided, each hole is provided that an end of the pin contacts with the probe corresponding with the pinboard, the other end contacts with the under-test point of the printed circuit board. The pin of the switchboard transmits the under-test point signal of the printed circuit board to the probe of the pin board and to the test machine by the wire. The utility model has the efficacy of reducing the testing cost enormously and increasing the density.

Description

The structure of the measurement jig of printed circuit board (PCB)

Technical field

The utility model is a kind of structure of measurement jig of printed circuit board (PCB), is meant a kind of structure of measurement jig that can significantly reduce testing cost and improve the innovation printed circuit board (PCB) of test density especially.

Background technology

As everyone knows, general printed circuit board (PCB) finish circuit cloth platform or with the electronic component assembling after, but for determining all normallies of every circuit, usually must be tested, the printed circuit board (PCB) that electronic circuit is intact is chosen, or after each electronic component is fixed in printed circuit board (PCB), also need be through the telecommunication test.

Shown in Figure 1, be a kind of structure of measurement jig of traditional printed circuit board (PCB), it includes a needle plate 10, most probes 12 and clamping plate 14; Be preset with the pin hole 16 of tested point 13 positions of corresponding determinand 11 (present embodiment is a printed circuit board (PCB)) on the needle plate 10, most probes 14 are made up of probe sleeve 18, syringe 20, spring 22 and needle body 24.Probe sleeve 18 is inserted in the default pin hole 16 of needle plate 10, and the one end is provided with lead 19, in order to signal is passed to test machine (figure does not show); Spring 22 is to be placed in the syringe 20, needle body 24 is to be inserted in the syringe 20, by the contractility of spring 22, makes needle body 24 have the restoring force of elastic telescopic in syringe 20, syringe 20 is to be fixed in the probe sleeve 18, and whole probe 12 is fixed on the needle plate 10.Also be preset with the pin hole 16 corresponding folder holes 26 with needle plate 10 on the clamping plate 14, and needle body 24 is the folder holes 26 that pass clamping plate 14, and protrudes from clamping plate 14, and pass the default perforation 17 of top board 15.

During use, determinand 11 is arranged at clamping plate 14 tops, contact with the needle body 24 of probe 12 by the sensing point 13 of Measurer determinand 11, and electric signal is passed to spring 22 and probe sleeve 18 in regular turn, and the lead 19 that is connected by probe sleeve 18 bottoms is passed on the test machine, judge whether conducting of tested point 13 by test machine, to finish the test jobs of determinand 11.Its major defect is:

When 1, contacting with the tested point 13 of determinand 11 owing to probe 12, the contractility that must have elastic recovery, to prevent to damage the electrical of tested point 13, therefore needle body 24 must be located in the syringe 20 with spring 22, needle body 24 is compressed can moves certainly and stretch answer, therefore, the volume of whole probe 12 can't be made quite tiny, or be made into when quite tiny, its relative cost is very high, so that causes the raising of testing cost and can't promote test density;

2, because probe sleeve 18 needs to cooperate the size design of probes 12, so its size also relatively is restricted, so that the global density of the pin hole 16 of needle plate 10 can't improve, and causes the determinand 11 that can't test high density tested point 13;

3, the electric signal of the tested point 13 of determinand 11 is the transmission that electrically contact by element combinations with one another such as needle body 24, flexible member 22, sleeve 20, probe sleeves 18, after transmitting through the contact of multiple tracks, cause signal to transmit bad phenomenon, so that influence the test quality of determinand 11, especially when the highdensity tested point of test, its effect is more not good;

4, probe 12 is to be fixed on the needle plate 10, can't dismantle, and therefore, after the determinand test of item number finishes by the gross, needle plate 10 and most probes 12 can't be exercised usefulness again, cause the raising of testing cost and the waste of resource.

Summary of the invention

Fundamental purpose of the present utility model provides a kind of structure of measurement jig of printed circuit board (PCB), by designing a kind of structure that includes a needle plate, most probes, plurality of wires and card extenders, reach the purpose of making facility and effectively reducing production costs.

Second purpose of the present utility model provides a kind of structure of measurement jig of printed circuit board (PCB), reaches to test more highdensity tested point and the quite cheap purpose of testing cost.

The 3rd purpose of the present utility model provides a kind of structure of measurement jig of printed circuit board (PCB), reaches heavily to cover the purpose of using tool and reducing production costs.

The purpose of this utility model is achieved in that a kind of structure of measurement jig of printed circuit board (PCB), include a needle plate, most probes, plurality of wires and card extenders, it is characterized in that: this needle plate is provided with pin hole corresponding to most tested point positions of printed circuit board (PCB); Each probe of this majority probe includes syringe, flexible member and needle body, this flexible member is to be arranged in the syringe, this needle body is to be inserted in this syringe, and contacts with this flexible member, and this syringe is to be inserted in the pin hole of needle plate of this special measuring point that contacts this printed circuit board (PCB); This plurality of wires is provided with first end points and second end points, and this first end points is the syringe that is connected in this probe, and another end points is in order to be passed to test machine with signal; Card extender is to be arranged at this needle plate top, which is provided with most the perforation corresponding to this tested point; Most needle bodies are to be arranged in the corresponding perforation of this card extender, contact with respect to the needle body of corresponding probe on needle body one end of this tested point position and this needle plate, and the other end contacts with the tested point of printed circuit board (PCB).

This needle plate has the pin hole of latticed criss-cross arrangement, and this probe is planted in the pin hole corresponding to most tested points of printed circuit board (PCB).First end points of this plurality of wires is to be wound on the syringe of probe.Second end points of this plurality of wires is to be connected on the winding displacement of test machine, and signal is passed to test machine.This card extender is densely covered with the perforation of latticed criss-cross arrangement, and this majority needle body is to be arranged in this perforation, contacts with the needle body that this needle plate is provided with probe with respect to needle body one end of this tested point position, and the other end contacts with the tested point of printed circuit board (PCB).

Further specify as follows below in conjunction with preferred embodiment and accompanying drawing:

Description of drawings

Fig. 1 is the decomposing schematic representation of traditional test tool.

Fig. 2 is a decomposing schematic representation of the present utility model.

Fig. 3 is the amplification cross-sectional schematic of the probe of Fig. 2.

Fig. 4 is the combination cross-sectional schematic of Fig. 2.

Fig. 5 is the combination cross-sectional schematic of embodiment 2 of the present utility model.

Fig. 6 is the combination cross-sectional schematic of embodiment 3 of the present utility model.

Embodiment

Embodiment 1

Consult Fig. 2-Fig. 4, the structure of the measurement jig of printed circuit board (PCB) of the present utility model includes a needle plate 30, most probes 32, plurality of wires 34 and card extenders 36;

Needle plate 30 is provided with pin hole 42 corresponding to most tested point 40 positions of printed circuit board (PCB) 38;

Each probe 32 includes syringe 44, flexible member 46 and needle body 48, flexible member 46 is to be arranged in the syringe 44, needle body 48 is to be inserted in the syringe 44, and contact with flexible member 46, and has elastic-restoring force, syringe 44 is to plug in the pin hole 42 that is fixed in needle plate 30, and needle body 48 is in order to the tested point 40 of contact print circuit board 38;

Plurality of wires 34, it is provided with first end points 52 and second end points, 54, the first end points 52 are to reel to be connected in the syringe 44 of probe 32, and another end points 54 is in order on the winding displacement (figure does not show) that signal is passed to test machine.

Card extender 36 is arranged at needle plate 30 tops, which is provided with most the perforation 56 corresponding to the tested point 40 of printed circuit board (PCB) 38, and card extender 36 is for being densely covered with the perforation 56 of latticed criss-cross arrangement in the present embodiment.

A most needle body 58 are to be arranged in respectively in the perforation 56 of card extender 36 corresponding to tested point 40, its needle body 48 with respect to corresponding probe 32 on needle body 58 1 ends of tested point 40 positions and the needle plate 30 contacts, the other end contacts with the tested point 38 of printed circuit board (PCB) 38, makes the tested point signal of printed circuit board (PCB) 38 be passed to the needle body 48 of probe 32 by needle body 58.

When card extender 36 is densely covered with the perforation 56 of latticed criss-cross arrangement, needle body 58 is the perforation 56 that are covered with card extender 36, the tested point 40 of printed circuit board (PCB) 38 will contact with corresponding needle body 58, and corresponding needle body 58 then contacts the probe 32 on the corresponding needle plate 30.

Consult Fig. 4, when carrying out the test of printed circuit board (PCB) 38, on the card extender 36 corresponding to the needle body 58 of tested point 40 with the tested point on the contact print circuit board 38 40, make signal be passed to needle body 58, the needle body 58 of not corresponding tested point 40 then forms not conducting state, in this way, will contact with probe 32, the signal of testing printed circuit board 38 will be passed to test machine (figure shows) by lead 34 through the needle body 58 of conducting.

Embodiment 2

Consult Fig. 5, when 40 position changes of the tested point on the printed circuit board (PCB) 38, pin hole on the needle plate 30 42 position changes are become corresponding with tested point 40, again probe 32 is inserted in the pin hole 42 of needle plate 30, at this moment, needle body 58 corresponding with the tested point 40 of printed circuit board (PCB) 38 on the card extender 36 is contact measured point 40, is passed to probe 32 on the needle plate 30 and will test signal.

Embodiment 3

Consult Fig. 6, when the density of most tested points 40 of printed circuit board (PCB) 30 too high, when making pin hole 42 on the needle plate 30 relatively improve its density, can be by the slope of the needle body 58 on the card extender 36, needle body 58 is obliquely installed, makes the signal of the tested point 40 on the printed circuit board (PCB) 38, conduct to probe 32 on the needle plate 30 by needle body 58, in this way, can improve test density.

By tectonic association as above, as seen the utlity model has following advantage:

1, lead 34 is connected on the probe 32 with winding mode, when wherein a probe 32 is damaged, probe 32 directly can be substituted from needle plate 30, and the lead 34 that is connected on the probe 32 will come off voluntarily, in this way, can reach the effect of being convenient to change probe 32.

2, the pin hole 42 of needle plate 30 default criss-cross arrangements, therefore, can be according to the position plant probe 32 of the tested point on the printed circuit board (PCB) 38 40, in this way, needle plate 30 can cooperate the determinand 38 of different item numbers heavily to cover use, to reduce testing cost.

3, because probe 32 and needle body 58 conductings conduction signal, and can be by the slope by needle body 58, to improve test density, therefore, probe need not made suitable tiny, also can improve test density, therefore, can reduce the manufacturing cost of probe.

Take a broad view of above explanation, the structure of the measurement jig of printed circuit board (PCB) of the present utility model really can reach its purpose and effect, and have novelty and creativeness.

Claims

1, a kind of structure of measurement jig of printed circuit board (PCB) includes a needle plate, most probes, plurality of wires and card extenders, it is characterized in that: this needle plate is provided with pin hole corresponding to most tested point positions of printed circuit board (PCB); Each probe of this majority probe includes syringe, flexible member and needle body, this flexible member is to be arranged in the syringe, this needle body is to be inserted in this syringe, and contacts with this flexible member, and this syringe is to be inserted in the pin hole of needle plate of this special measuring point that contacts this printed circuit board (PCB); This plurality of wires is provided with first end points and second end points, and this first end points is the syringe that is connected in this probe, and another end points is in order to be passed to test machine with signal; Card extender is to be arranged at this needle plate top, which is provided with most the perforation corresponding to this tested point; Most needle bodies are to be arranged in the corresponding perforation of this card extender, contact with respect to the needle body of corresponding probe on needle body one end of this tested point position and this needle plate, and the other end contacts with the tested point of printed circuit board (PCB).

2, the structure of the measurement jig of printed circuit board (PCB) according to claim 1 is characterized in that: this needle plate has the pin hole of latticed criss-cross arrangement, and this probe is planted in the pin hole corresponding to most tested points of printed circuit board (PCB).

3, the structure of the measurement jig of printed circuit board (PCB) according to claim 1 is characterized in that: first end points of this plurality of wires is to be wound on the syringe of probe.

4, the structure of the measurement jig of printed circuit board (PCB) according to claim 1 is characterized in that: second end points of this plurality of wires is to be connected on the winding displacement of test machine, and signal is passed to test machine.

5, the structure of the measurement jig of printed circuit board (PCB) according to claim 1, it is characterized in that: this card extender is densely covered with the perforation of latticed criss-cross arrangement, this majority needle body is to be arranged in this perforation, needle body one end with respect to this tested point position contacts with the needle body that this needle plate is provided with probe, and the other end contacts with the tested point of printed circuit board (PCB).