CN101576571A - Density conversion method and density conversion device for PCB test machine - Google Patents
Density conversion method and density conversion device for PCB test machine Download PDFInfo
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- CN101576571A CN101576571A CN 200810096145 CN200810096145A CN101576571A CN 101576571 A CN101576571 A CN 101576571A CN 200810096145 CN200810096145 CN 200810096145 CN 200810096145 A CN200810096145 A CN 200810096145A CN 101576571 A CN101576571 A CN 101576571A
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Abstract
The invention relates to a density conversion method and a density conversion device for a PCB test machine. The invention is characterized in that a set of conversion device is additionally arranged between a test fixture and a test machine needle bed; the conversion device comprises a conversion dial arranged at the upper layer and a winding wire arranged at the lower layer, wherein the conversion dial is provided with a reset connection mechanism to ensure good electrical connection between a contact point and a probe of the test fixture, and thus, the gap between the contact point and the probe of the test fixture caused by mutual extrusion or relative position change can be eliminated in time by the self-reset function of the reset connection mechanism; and one end of the winding wire arranged at the lower layer of the conversion device is connected with a lead wire of the conversion dial, and the other end is in contact with a probe of the test machine needle bed to enable a spring below the probe to be in a compressing state so as to ensure good electrical contact between the probe of the test machine needle bed and the lead wire. The conversion device greatly improves the reliability of test after density conversion by the cooperation of the conversion dial and the winding wire, therefore, the test for a high-density PCB without changing the original configuration of the test machine is feasible.
Description
[technical field]
The present invention relates to a kind of printed circuit board (PCB) (Printed Circuit Board; PCB) field tests refers in particular to a kind of PCB test machine density conversion method and device thereof.
[background technology]
In PCB test industry, the test point standard that a kind of standard universal is arranged---four density (promptly arranging 400 test contact points equably) at 1 square inch, and each test point must be connected with waiting test circuit, and existing P CB board test apparatus all is by line the test circuit pin directly to be soldered to the test contact point to carry out test job, yet now the integrated level of circuit board is more and more higher, solder joint is more and more littler, density is close more, and the development of pcb board test machine often has certain hysteresis by contrast, the price of pcb board test machine is very high in addition, use enterprise often can't bear the update to corresponding test machine, but this means that also enterprise is missing a chance, even causes enterprise to be defeated in the spring tide of the market of cut-throat competition.How by original test machine is done its adaptation or part are adapted to increase fast in more the testing requirement of high density solder joint PCB become and be badly in need of the matter of utmost importance that solves in the industry.
[summary of the invention]
The objective of the invention is to overcome above-mentioned defective, a kind of density conversion method and corresponding device for carrying out said thereof that directly applies on original test machine is provided, realized the purpose of on the test machine of original low test density, the higher density pcb board being tested by this method and device.
The object of the present invention is achieved like this: a kind of PCB test machine density conversion method, and its improvements are: be provided with conversion equipment between test fixture and the test machine needle-bar, this conversion equipment comprises double-layer structure, and the upper strata is the conversion dials, and lower floor is row's pin; Described conversion dials upper end is provided with the netted contact corresponding with the test fixture probe, terminal contacts is provided with lead-in wire on the correspondence of lower end, contact and lead-in wire are electrically connected, lead-in wire and lower floor row's pin links to each other, and the contact has the bindiny mechanism that resets that is used to guarantee that good electrical is connected between contact and test fixture probe; Row's pin of described lower floor is used for lead-in wire and test machine needle-bar probe are electrically connected.
A kind of conversion equipment that is applicable to above-mentioned PCB test machine with density conversion method, its improvements are: it is two-layer about comprising, and the upper strata is the conversion dials, and lower floor is row's pin, and levels is folded mutually and is set up on the test machine needle-bar by seat leg; The corresponding netted open-end hole that is provided with the test fixture probe of described conversion dials upper surface is provided with spring reset mechanism in the through hole, the spring reset mechanism body is a spring, and its upper end is used to contact the test fixture probe, and the lower end links to each other with row's pin by lead; Described row's pin is made up of substrate and the connection pin fixed on it.Connect the pin two ends and stretch out in outside the substrate upper and lower surface, its upper end links to each other with conversion dials lead-in wire, and the lower end is used for linking to each other with test machine needle-bar probe;
Described row's pin connects the extension length of pin lower end greater than the distance of row's pin base lower surface to test machine needle-bar probe;
Be provided with the snap ring that is used for clamping spring reset mechanism in the netted open-end hole of described conversion dials;
Described spring reset mechanism comprises a spring, and the needle holder that is formed with corresponding test fixture probe is shunk in its upper end, and lower end and lead-in wire are electrically connected.
Beneficial effect of the present invention is to provide a kind of PCB test machine density conversion method, this method is the extra cover conversion equipment that adds between test fixture and test machine needle-bar, conversion equipment is made up of conversion dials and lower floor's row's pin on upper strata, the conversion dials is provided with the bindiny mechanism that resets, can be when can or relative position take place in mutual extrusion therebetween changes to guarantee good being electrically connected between contact and test fixture probe, to make by the elimination gap in time that resets certainly of the bindiny mechanism that resets.Winding displacement one end of conversion equipment lower floor links to each other with conversion dials lead-in wire, and the other end contacts on test machine needle-bar probe and guarantees good being electrically connected therebetween.
Another one beneficial effect of the present invention is also to provide a kind of density conversion equipment that is applicable to said method, this device comprises two-layer up and down, the upper strata is the conversion dials, lower floor is row's pin, not only play effective elimination upper end needle holder and test fixture probe gap by the spring in the conversion dials spring reset mechanism, guarantee the effect of good electrical connection therebetween, also make the upper end needle holder be electrically connected by this spring and lower end lead-in wire, thereby the test fixture probe that density is changeless is converted to the lead-in wire mode of variable density, has realized the density conversion.And be arranged at the row pin of conversion under the dials, it stretches out the outer connection pin upper end of substrate and links to each other with conversion dials lead-in wire, long the extending in the test machine needle-bar in lower end links to each other with its internal probe, and vertically probe is carried out roof pressure, make the spring under the probe be in a state that compresses, with good electric contact the between guaranteeing test machine needle-bar probe and going between.This shows that this device has improved the reliability that is used to test after the density conversion greatly by this two-part cooperation, make to become feasible not changing on the basis that test machine disposes originally the high density pcb board tested.
[description of drawings]
The present invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is an one-piece construction synoptic diagram of the present invention.
Fig. 2 is an a-a cross-sectional schematic shown in Figure 1.
Fig. 3 is a b-b cross-sectional schematic shown in Fig. 1.
Fig. 4 is the inner structure synoptic diagram of the present invention's first specific embodiment conversion dials.
Fig. 5 is the inner structure synoptic diagram of the present invention's second specific embodiment conversion dials.
Fig. 6 is the structural representation of the present invention's the 3rd specific embodiment conversion dials.
[embodiment]
A kind of PCB test machine density conversion method, by a conversion equipment is set between test fixture and test machine needle-bar, this device comprises double-layer structure, and the upper strata is the conversion dials, and lower floor is row's pin; The corresponding test fixture probe in conversion dials upper end is provided with netted contact, terminal contacts is provided with lead-in wire on the correspondence of lower end, be electrically connected between contact and lead-in wire, and the contact has the bindiny mechanism that resets that is used to guarantee that good electrical is connected between contact and test fixture probe, and the lead-in wire other end is connected to the row of lower floor pin, and row's pin of this lower floor is used for lead-in wire being linked to each other with test machine needle-bar probe and guaranteeing that good electrical is connected therebetween.
A kind of conversion equipment that is applicable to above-mentioned PCB test machine with density conversion method, it is arranged at 3 of test machine needle-bar 1 and test fixtures, be used for the test fixture that the script probe density is higher 3 conversions and be used for the lower test machine needle-bar 1 of original probe density, thereby realize purpose the test of high density pcb board.
Referring to Fig. 1, this conversion equipment comprises two-layer up and down, its lower floor is row's pin substrate 7 that is arranged on the test machine needle-bar 1, four density that test machine needle-bar probe is 101 one-tenth lower are arranged, see the a-a cut-open view of Fig. 2, the connection pin 702 of row's pin substrate 7 is that corresponding test machine needle-bar probe 101 is provided with, connect in pin 702 row's of being fixedly set in pin substrates 7, its two ends are all outside the row's of stretching out in pin substrate 7 upper and lower surfaces, and the extension elongation that connects pin 702 lower ends slightly is longer than the distance c of housing lower surface to 101 of test machine needle-bar probes, row's pin substrate 7 by 701 of socles after on the test machine needle-bar 1, inserting the test machine needle-bar by the extension, syringe needle lower end of the row's pin in it touches mutually with its internal probe, and give the roof pressure power of a vertical direction of needle-bar probe, make the spring under the probe be in an impaction state, eliminate gap assurance good electrical purpose of connecting thereby reach.
The upper strata of described conversion equipment is the conversion dials; It comprises frame 2; Frame 2 levels are provided with dials 201; 202 on dials 201 column by four limits is on row's pin substrate 7; Dials 201 surfaces have netted open-end hole 203; The corresponding setting with the test fixture probe of through hole 203; Its density is usually above the arranging density of test machine needle-bar probe; Be depicted as eight density such as b-b cutaway view among Fig. 3 and arrange (if needs; The corresponding density of test fixture can further improve to 16 density or higher); Be provided with spring reset mechanism in the dials through hole 203
Referring to Fig. 4 first kind of specific embodiment of conversion dials for density conversion equipment of the present invention,
The spring reset mechanism that is provided with in the conversion dials netted open-end hole 203 among the embodiment is a spring line 4, the lower end of through hole 203 is provided with the boss 204 that is used for the clamping spring, above-mentioned spring line 4 is the universal standard parts that can buy in a kind of industry, its main body is a spring 401, spring 401 upper ends are shunk and are formed with needle holder 402, needle holder 402 cross sections are tapered to be used to carry corresponding test fixture probe, spring 401 lower ends are connected with lead-in wire 403,403 other ends that go between directly in the row's of being wound in pin substrate 7 on the corresponding syringe needle 702, are connected to test machine needle-bar probe by this connection pin 702 by specific purpose tool again.
Referring to Fig. 5 then for second kind of specific embodiment of conversion dials of density conversion equipment of the present invention,
Conversion dials in the present embodiment links to each other with test fixture 3 orlops, be provided with the snap ring 505 that is used to fix spring reset mechanism in the netted open-end hole 203 of dials, spring reset mechanism in the present embodiment has adopted application specific probe 5, it also is the universal standard part that can buy in a kind of industry, this application specific probe 5 is by the spring 502 of housing 501 and interior fixing thereof and pop one's head in and 503 form, and spring 502 lower ends also are connected with lead-in wire 504.Directly the common probe in the test fixture 301 is replaced during use and be this kind application specific probe 5, and by being arranged at the conversion dials clamping of test fixture lower end, with the lead-in wire 403 of dedicated probe 5 by specific purpose tool directly on the row's of being wound in pin substrate 7 corresponding syringe needles 702, connecting pin 702 by this again links to each other with test machine needle-bar probe, make this probe be used for circuit board testing flexibly connecting of a band reset function also is provided simultaneously, thereby guarantee good electric contact the between test fixture probe and lower end needle holder, realize test density conversion purpose.
In sum; the invention provides a kind of practical; and the simple and effective PCB test machine of implementation method density conversion method and corresponding several device for carrying out said thereof; it is to be noted; the invention is not restricted to above-mentioned embodiment; for example can also be by one deck vertical conduction rubber being set to realize the function of density conversion at test machine needle-bar 1 and 3 of test fixtures; as shown in Figure 6; these vertical conduction layer two ends are support 603; be used on the solid and test machine needle-bar 1 of frame; the probe of corresponding test fixture is provided with upper contact 601 in its horizontal ends upper surface; the upper contact 601 of the inner corresponding upper surface of the lower surface of vertical conduction rubber is provided with lower contact 602; lower contact 602 lower ends also now connect with lead-in wire 604; 604 other ends that go between are wound in 7 corresponding connections on the pins 702 of row's pin substrate; connecting pin 702 by this again links to each other with test machine needle-bar probe roof pressure; and because the conductive rubber that adopts is a vertical conduction rubber herein; just meeting energy conducting is squeezed under the situation that upper and lower contact in the conductive rubber layer only is in vertical position; add that rubber itself has certain elasticity; under the external carbuncle subtle change, also can realize reset function; not only guaranteed the electrical isolation problem between the water-level contact; also make upper and lower contact under certain deformation, keep excellent contact; thereby reach the reliability requirement of actual density conversion equipment; also can realize the translation function of test machine test density; so any simple modification that any those skilled in the art do the foregoing description in based on the technical scheme of the inventive method or device; equivalent variations and modification all belong in protection scope of the present invention.
Claims (5)
1, a kind of PCB test machine density conversion method, it is characterized in that: be provided with conversion equipment between test fixture and the test machine needle-bar, this conversion equipment comprises double-layer structure, and the upper strata is the conversion dials, and lower floor is row's pin; Described conversion dials upper end is provided with the netted contact corresponding with the test fixture probe, terminal contacts is provided with lead-in wire on the correspondence of lower end, contact and lead-in wire are electrically connected, lead-in wire and lower floor row's pin links to each other, and the contact has the bindiny mechanism that resets that is used to guarantee that good electrical is connected between contact and test fixture probe; Row's pin of described lower floor is used for lead-in wire and test machine needle-bar probe are electrically connected.
2, a kind of conversion equipment that is applicable to the described PCB test machine of claim 1 with density conversion method, it is characterized in that: it is two-layer about comprising, and the upper strata is the conversion dials, and lower floor is row's pin, and levels is folded mutually and is set up on the test machine needle-bar by seat leg; The corresponding netted open-end hole that is provided with the test fixture probe of described conversion dials upper surface is provided with spring reset mechanism in the through hole, the spring reset mechanism body is a spring, and its upper end is used to contact the test fixture probe, and the lower end links to each other with row's pin by lead; Described row's pin is made up of substrate and the connection pin fixed on it, connects the pin two ends and stretches out in outside the substrate upper and lower surface, and its upper end links to each other with conversion dials lead-in wire, and the lower end is used for linking to each other with test machine needle-bar probe.
3, conversion equipment as claimed in claim 2 is characterized in that: described row's pin connects the extension length of pin lower end greater than the distance of row's pin base lower surface to test machine needle-bar probe.
4, conversion equipment as claimed in claim 2 is characterized in that: be provided with the snap ring that is used for clamping spring reset mechanism in the netted open-end hole of described conversion dials.
5, conversion equipment as claimed in claim 4 is characterized in that: described spring reset mechanism comprises a spring, and the needle holder that is formed with corresponding test fixture probe is shunk in its upper end, and lower end and lead-in wire are electrically connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810096145 CN101576571B (en) | 2008-05-06 | 2008-05-06 | Density conversion method and density conversion device for PCB test machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810096145 CN101576571B (en) | 2008-05-06 | 2008-05-06 | Density conversion method and density conversion device for PCB test machine |
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| Publication Number | Publication Date |
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| CN101576571A true CN101576571A (en) | 2009-11-11 |
| CN101576571B CN101576571B (en) | 2013-04-10 |
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| CN 200810096145 Active CN101576571B (en) | 2008-05-06 | 2008-05-06 | Density conversion method and density conversion device for PCB test machine |
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Cited By (8)
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| CN102495301A (en) * | 2011-11-14 | 2012-06-13 | 福建联迪商用设备有限公司 | Testing device and testing method of narrow interval pin headers on PCB (printed circuit board) |
| CN103048576A (en) * | 2013-01-24 | 2013-04-17 | 昆山尼赛拉电子器材有限公司 | Terminal detection fixture |
| CN104111358A (en) * | 2014-07-11 | 2014-10-22 | 浙江开化建科电子科技有限公司 | Dedicated PCB test frame |
| CN105891608A (en) * | 2016-06-28 | 2016-08-24 | 深圳市深联电路有限公司 | Circuit board inductance test device and method |
| CN107741558A (en) * | 2017-11-09 | 2018-02-27 | 江苏稳润光电科技有限公司 | A kind of the semi-finished product test device and method of short PIN charactrons |
| CN108008161A (en) * | 2017-10-26 | 2018-05-08 | 惠州市金百泽电路科技有限公司 | The quick determination method of metallized semi-pore photovoltaic electrical property |
| CN108982932A (en) * | 2018-08-07 | 2018-12-11 | 深圳市芽庄电子有限公司 | Concealed printed circuit board test fixture |
| CN110058148A (en) * | 2019-05-29 | 2019-07-26 | 深圳市凯码时代科技有限公司 | Switching circuit board, switching fixture framework and corresponding circuit switch method |
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| CN1685240A (en) * | 2002-08-27 | 2005-10-19 | Jsr株式会社 | Anisotropic conductive sheet and probe for measuring impedances |
| CN2660540Y (en) * | 2003-11-07 | 2004-12-01 | 王云阶 | Conducting structure of probe assembly and wire in electronic and detecting implement |
| CN100394190C (en) * | 2003-12-03 | 2008-06-11 | 联能科技（深圳）有限公司 | Testing device for density variable printed circuit board |
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| CN201004081Y (en) * | 2007-01-18 | 2008-01-09 | 王云阶 | Electron and circuit plate detection device |
| CN201199247Y (en) * | 2008-05-06 | 2009-02-25 | 深圳麦逊电子有限公司 | Density changeover mechanism for PCB tester |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102495301A (en) * | 2011-11-14 | 2012-06-13 | 福建联迪商用设备有限公司 | Testing device and testing method of narrow interval pin headers on PCB (printed circuit board) |
| CN102495301B (en) * | 2011-11-14 | 2014-07-09 | 福建联迪商用设备有限公司 | Testing device and testing method of narrow interval pin headers on PCB (printed circuit board) |
| CN103048576A (en) * | 2013-01-24 | 2013-04-17 | 昆山尼赛拉电子器材有限公司 | Terminal detection fixture |
| CN104111358A (en) * | 2014-07-11 | 2014-10-22 | 浙江开化建科电子科技有限公司 | Dedicated PCB test frame |
| CN105891608A (en) * | 2016-06-28 | 2016-08-24 | 深圳市深联电路有限公司 | Circuit board inductance test device and method |
| CN108008161A (en) * | 2017-10-26 | 2018-05-08 | 惠州市金百泽电路科技有限公司 | The quick determination method of metallized semi-pore photovoltaic electrical property |
| CN107741558A (en) * | 2017-11-09 | 2018-02-27 | 江苏稳润光电科技有限公司 | A kind of the semi-finished product test device and method of short PIN charactrons |
| CN108982932A (en) * | 2018-08-07 | 2018-12-11 | 深圳市芽庄电子有限公司 | Concealed printed circuit board test fixture |
| CN110058148A (en) * | 2019-05-29 | 2019-07-26 | 深圳市凯码时代科技有限公司 | Switching circuit board, switching fixture framework and corresponding circuit switch method |
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| CN101576571B (en) | 2013-04-10 |
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