CN2491845Y

CN2491845Y - Probe board structure of detecting tool

Info

Publication number: CN2491845Y
Application number: CN 01226643
Authority: CN
Inventors: 吴志成; 杨昌国
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-06-12
Filing date: 2001-06-12
Publication date: 2002-05-15
Anticipated expiration: 2011-06-12

Abstract

Disclosed is a needle plate structure of a testing tool, a lower needle plate is provided with a plurality of corresponding lower pinholes, a middle needle plate is densely provided with waffle-like middle pinholes which are arranged in length and breadth, the diameter of the middle pinhole is bigger than the diameter of the lower pinhole, a plurality of flexible members connected with wires are penetrated through the middle pinhole and the lower pinhole, thereby the flexible members are blocked by the lower pinhole and positioned in the middle pinhole, a second punch hole of the upper needle plate corresponding to the middle needle plate is provided with a third punch hole, the diameter of the third punch hole is smaller than the diameter of the flexible members to confine the movement of the flexible members, thereby simplifying the structure, reducing the cost, and increasing the detecting density.

Description

The needle plate structure of testing tool

The utility model relates to testing tool, refers to a kind of needle plate structure that can significantly reduce testing cost and improve the testing tool of measuring accuracy especially.

Press, general printed circuit board (PCB) after finishing configuration, but for determining all normallies of every circuit, must be tested usually, the printed circuit board (PCB) that electronic circuit is intact is chosen, and each electronic component is fixed on the printed circuit board (PCB) again.

Referring to Fig. 1, be the testing tool of known a kind of printed circuit board (PCB), comprise a needle plate 10, plurality of probes 12 and clamping plate 14: be preset with the pin hole 16 of pin 13 positions of corresponding determinand 11 (present embodiment is a printed circuit board (PCB)) on this needle plate 10, plurality of probes 12 is made up of probe sleeve 18, syringe 20, spring 22 and needle body 24.Probe sleeve 18 is plugged 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 the test machine (not shown); Spring 22 is placed in the syringe 20, and needle body 24 is inserted in the syringe 20, by the contractility of spring 22, make needle body 24 have the restoring force of elastic telescopic in syringe 20, and syringe 20 is fixed in the probe sleeve 18, so 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 passes the folder hole 26 of clamping plate 14, and protrude from clamping plate 14, and pass the default perforation 17 of top board 15.

At this moment, printed circuit board (PCB) is arranged at clamping plate 14 tops, contact with the needle body 24 of probe 12 by the pin 13 of test machine printed circuit board (PCB), electric signal is passed to spring 22, probe sleeve 18 in regular turn, and the lead 19 that is connected with probe sleeve 18 bottoms is passed on the test machine, judge whether conducting of pin 13 by test machine, to finish the test jobs of printed circuit board (PCB).

As mentioned above, known testing tool has following shortcoming:

When 1, contacting with the pin 13 of determinand 11 owing to probe 12, the contractility that must have elastic recovery, to prevent to damage the electrical of pin 13, therefore needle body 24 must be located in the syringe 20 with spring 22, can move certainly after needle body 24 is compressed and stretch answer, so contexture, 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 again, so that causes the raising of testing cost and can't improve 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 also can't improve, and will cause the circuit board that can't test high density pin 13.

3, the electric signal of the pin 13 of printed circuit board (PCB) (being determinand 11) is by the transmission that electrically contacts of element combinations with one another such as needle body 24, spring 22, syringe 20, probe sleeve 18, after transmitting through the contact of multiple tracks, to cause signal to transmit bad phenomenon, so that influence the test mass of printed circuit board (PCB), especially when the highdensity pin of test, its effect is more undesirable.

4, probe 12 is fixed on the needle plate 10 and can't dismantles, and therefore, after the printed circuit board test of item number finishes by the gross, needle plate 10 and most probes 12 can't re-use, and cause the raising of testing cost and the waste of resource.

The purpose of this utility model is: provide a kind of easily manufactured, can effectively reduce production costs, can test more highdensity determinand, and testing cost quite cheap, have and improve the test conduction effect, reach needle plate structure better test effect, reusable testing tool.

The utility model purpose is achieved in that a kind of needle plate structure of testing tool, mainly comprise probe and the determinand with a plurality of pins and the upper, middle and lower needle plate that are conducted with probe, it is characterized in that: this needle plate includes: be preset with the corresponding lower pinhole of a plurality of pins with determinand on the following needle plate, be densely covered with the middle pin hole of latticed criss-cross arrangement on the middle needle plate, lower pinhole diameter of the following needle plate of pinhole diameter is big in this; A plurality of flexible members that are connected with lead, the middle pin hole of needle plate and down in the lower pinhole of needle plate in being arranged in respectively makes this flexible member be propped up by lower pinhole and is arranged in the pin hole of needle plate.

The utility model also can be realized by following technical measures: above-mentioned upward needle plate is densely covered with the last pin hole of latticed criss-cross arrangement, this time needle plate is densely covered with the lower pinhole of latticed criss-cross arrangement, upward pin hole and lower pinhole diameter are little than flexible member, to limit this flexible member; Above-mentioned second punch position of going up middle relatively needle plate on the needle plate is preset with the 3rd perforation, and the 3rd penetration hole diameter is little than this flexible member, to limit this flexible member; Above-mentioned determinand is printed circuit board (PCB), semiconductor encapsulated element or wafer; Above-mentioned flexible member one end is provided with probe and contacts, but and the dragging of the crooked probe of correcting to portion; The middle pin hole spacing of needle plate is 1.27mm or below the 1.27mm in above-mentioned; The length of above-mentioned probe is 36-50mm; Above-mentioned upward needle plate is densely covered with the last pin hole of latticed criss-cross arrangement, and this time needle plate is densely covered with the lower pinhole of latticed criss-cross arrangement, and pin hole and lower pinhole diameter are little than flexible member on this, to limit this flexible member; Above-mentioned needle plate down bottom is provided with support column in the position that is not provided with flexible member.

Now the utility model is described in further detail by the following drawings and embodiment:

Fig. 1, be the three-dimensional exploded view of known testing tool.

Fig. 2, be three-dimensional exploded view of the present utility model.

Fig. 3, be the assembled sectional view of Fig. 2.

Fig. 4, be that the utility model implements illustration.

Referring to the needle plate structure of Fig. 2-4, a kind of testing tool, test determinand 28 by probe 62 with a plurality of pins 29, this determinand can be printed circuit board (PCB), semiconductor encapsulated element or wafer; Needle plate structure on it includes: be preset with a plurality of pins 29 corresponding lower pinholes 42 with determinand 28 on the following needle plate 30; Be densely covered with the middle pin hole 44 of latticed criss-cross arrangement on the middle needle plate 32, lower pinhole 42 diameters of the following needle plate 30 of pin hole 44 diameters are big in this; A plurality of flexible members 36 that are connected with lead 38, the middle pin hole 44 of needle plate 32 and down in the lower pinhole 42 of needle plate 30 in being arranged in respectively makes this flexible member 36 be propped up by lower pinhole 42 and is arranged in the pin hole 44 of this needle plate 32; And to be preset with the 3rd perforation 46, the three perforation 46 diameters be little than this flexible member 36 second perforation, 44 positions of needle plate 32 in relatively on the needle plate 34 on one, to limit the displacement of this flexible member 36.

Following needle plate 30 is preset with a plurality of lower pinholes 42 corresponding to pin 29, and each lower pinhole 42 spacing can be 1.27mm or below the 1.27mm, tests to be suitable for more highdensity pin 29.

In needle plate 32 be stacked and placed on down needle plate 30 tops, be densely covered with latticed crisscross middle pin hole 44 on it, its slightly larger in diameter what lower pinhole 42, pin hole 44 spacings can be 1.27mm or below the 1.27mm, to be applicable to the more test of high density pin 29 in each.

The top of needle plate 32 during last needle plate 34 is stacked and placed on is densely covered with the last pin hole 46 of latticed criss-cross arrangement on it, pin hole 44 in its slightly larger in diameter what, and spacing can be 1.27mm or below the 1.27mm, to be applicable to the more test of high density pin 29.

Be provided with first end points 48 that contacts with probe 62 referring to Fig. 3, a plurality of flexible member 36 upper ends and reach dragging of linking to each other with first end points 48 to portion 52, flexible member 36 lower end electricity connect a lead 38, the middle needle plate 32 that the lead 38 that is connected with flexible member 36 is worn corresponding to pin 29 reaches middle pin hole 44, lower pinhole 42 positions of needle plate 30 down, the lower end of flexible member 36 is just propped up by lower pinhole 42, and be arranged in pin hole 44, and can in middle pin hole 44, move as elastic recovery.

To go up needle plate 34 and be covered on middle needle plate 32 tops, with the displacement of restriction flexible member 36.

A plurality of support columns 40 are arranged on down the position that needle plate 30 is not provided with flexible member 36, and needle plate 32 reaches the intensity that goes up needle plate 34 in then can improving, and makes each needle plate when carrying out the test of determinand 28, unlikely breakage under the gravity situation.

Referring to Fig. 4, be that the utility model implements illustration, when carrying out the test of determinand 28, one clamping plate 58 at first are set above last needle plate 34, also be preset with pin 29 corresponding folder holes 60 on these clamping plate 58 with determinand 28, plurality of probes 62 is arranged in respectively on the folder hole 60, and the last pin hole 46 that passes needle plate 34 contacts with dragging to portion 52 of flexible member 36, and makes probe 62 have elastic-restoring force and can be automatically with 62 correctings of crooked probe.In addition, appropriate position, clamping plate 58 top is provided with a top board 64, pin 29 positions with respect to determinand 28 on this top board 64 are provided with perforation 66, make probe 62 tops pass perforation 66 and protrude top board 64 and contact with the pin 29 of determinand 28, to reach the detection to each pin 29.

The length of above-mentioned probe is 36-50mm.

By above-mentioned structure combination, the utlity model has following advantage:

1, flexible member is inserted in the lower pinhole of lower needle plate, directly contact with flexible member with probe again Conducting, and probe structure is simple can be made into quite tinyly, and its manufacturing cost is quite cheap, can have Effect reduces testing cost.

2, flexible member directly is connected with lead, therefore, connects the signal transmission of pin only by probe and elasticity The conduction of element, and can obtain better signal transmission effect.

3, the middle pin hole of the default criss-cross arrangement of middle needle plate can be put flexible member according to the position that connects pin In corresponding middle pin hole, again probe is placed on the position that is provided with flexible member, and form test The needle plate of instrument, visible needle plate can cooperate the determinand of different types to re-assembly use, so can reduce Testing cost.

Therefore 4,, can improve the test density of pin and reduce cost because probe can be made into quite tiny technically and cost is quite cheap.

5, middle needle plate has the middle pin hole of latticed criss-cross arrangement, thus optionally insert flexible member and probe, therefore, in the perforated bottom that is not provided with flexible member support column can be set, so, can improve pin hole intensity and density, with the higher determinand of test density.

Claims

1, a kind of needle plate of testing tool structure, mainly comprise probe and the determinand with a plurality of pins and the upper, middle and lower needle plate that are conducted with probe, it is characterized in that: this needle plate includes: be preset with the corresponding lower pinhole of a plurality of pins with determinand on the following needle plate, be densely covered with the middle pin hole of latticed criss-cross arrangement on the middle needle plate, lower pinhole diameter of the following needle plate of pinhole diameter is big in this; A plurality of flexible members that are connected with lead, the middle pin hole of needle plate and down in the lower pinhole of needle plate in being arranged in respectively makes this flexible member be propped up by lower pinhole and is arranged in the pin hole of needle plate.

2, construct according to the needle plate of the described testing tool of claim 1, it is characterized in that: above-mentioned upward needle plate is densely covered with the last pin hole of latticed criss-cross arrangement, this time needle plate is densely covered with the lower pinhole of latticed criss-cross arrangement, upward pin hole and lower pinhole diameter are little than flexible member, to limit this flexible member.

3, according to the needle plate structure of claim 1 or 2 described testing tools, it is characterized in that: above-mentioned second punch position of going up middle relatively needle plate on the needle plate is preset with the 3rd perforation, and the 3rd penetration hole diameter is little than this flexible member, to limit this flexible member.

4, according to the needle plate structure of the described testing tool of claim 1, it is characterized in that: above-mentioned determinand is printed circuit board (PCB), semiconductor encapsulated element or wafer.

5, according to the needle plate of the described testing tool of claim 1 structure, it is characterized in that: above-mentioned flexible member one end is provided with probe and contacts, but and the dragging of the crooked probe of correcting to portion.

6, according to the needle plate of the described testing tool of claim 1 structure, it is characterized in that: the middle pin hole spacing of needle plate is 1.27mm or below the 1.27mm in above-mentioned.

7, according to the needle plate structure of the described testing tool of claim 1, it is characterized in that: the length of above-mentioned probe is 36-50mm.

8, according to the needle plate structure of the described testing tool of claim 1, it is characterized in that: above-mentioned needle plate bottom down is provided with support column in the position that is not provided with flexible member.