CN101576572A - Density conversion method and density conversion mechanism for PCB test machine - Google Patents
Density conversion method and density conversion mechanism for PCB test machine Download PDFInfo
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- CN101576572A CN101576572A CNA2008100961465A CN200810096146A CN101576572A CN 101576572 A CN101576572 A CN 101576572A CN A2008100961465 A CNA2008100961465 A CN A2008100961465A CN 200810096146 A CN200810096146 A CN 200810096146A CN 101576572 A CN101576572 A CN 101576572A
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Abstract
The invention relates to a density conversion method and a density conversion mechanism for a PCB test machine. The invention is characterized in that a conversion mechanism is additionally arranged between a test fixture and a test machine needle bed; the conversion mechanism comprises a connection dial arranged at the upper layer and a conversion wire board arranged at the lower layer, wherein the upper end and the lower end of the conversion wire board are respectively provided with netted contact points corresponding to a probe of the test fixture and a probe of the test machine needle bed, and the contact points at the two ends are correspondingly connected through lead wires in the conversion wire board; and a reset connection mechanism corresponding to the probe of the test fixture is arranged on the connection dial, and the probe of the test fixture is electrically connected with the contact point of a conversion circuit board through the reset connection mechanism. When the density conversion mechanism is used, a reset device in a spring dial is in a compressing state, the probe of the test machine needle bed is retracted inwards by the extrusion of the conversion wire board, and a spring in the probe of the test machine needle bed is also in the compressing state. Thus, the favorable electrical connection among the spring dial, the probe of the test machine needle bed and the conversion wire board is effectively ensured by the self-reset action of the spring, and the reliability of the conversion mechanism for practical application is greatly increased.
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 throw-over gear 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, the mechanism of a kind of density conversion method and corresponding realization thereof conversion is provided, under the situation that has realized need not original test machine body is changed, the purpose that can test the high density pcb board.
The object of the present invention is achieved like this: a kind of PCB test machine density conversion method, its improvements are: a throw-over gear is set between test fixture and the test machine needle-bar, this throw-over gear comprises double-layer structure, and its upper strata is for connecting dials, and lower floor is the conversion line connection board; Corresponding respectively test fixture probe of described conversion line connection board upper and lower side and test machine needle-bar probe are provided with netted contact, and two terminal contacts are by corresponding linking to each other of conversion line connection board inside conductor; Described connection dials is provided with and the corresponding bindiny mechanism that resets of test fixture probe, by this bindiny mechanism that resets test fixture probe and change-over circuit plate contact is electrically connected.
A kind of throw-over gear that is applicable to above-mentioned PCB test machine with density conversion method, its improvements are: it comprises two-layer up and down, the upper strata is that spring connects dials, and lower floor is the change-over circuit plate, and the upper strata is set up on the lower circuit plate by seat leg and is stacked and placed on the test machine needle-bar; Described spring connects the corresponding test fixture probe of dials upper surface and is provided with netted open-end hole, the through hole internal fixation is provided with spring reverse motion, the main body of spring reverse motion is a spring that has better electric conductivity, the spring upper end is used to contact the test fixture probe, and the lower end overhead is on the corresponding contact on change-over circuit plate upper strata; Described change-over circuit plate comprises basic unit, upper strata and lower floor, the corresponding spring in circuit board upper strata connects the dials through hole and is provided with netted contact, lower floor then is provided with the netted contact of corresponding test machine needle-bar probe, netted contact is used for pressing to touch on test machine needle-bar probe being electrically connected, and is placed with in the change-over circuit plate basic unit to be used for the corresponding lead that links to each other in the contact of levels;
Described change-over circuit plate is a PCB change-over panel, and the contact of its levels protrudes from the surface of pcb board;
Be provided with the boss that is used for the clamping spring reverse motion in the described spring connection dials netted open-end hole;
The spring of described spring reverse motion, its upper end are a little less than conversion dials upper surface, and the spring lower end is shunk and formed the spring section of a diameter less than through hole boss section internal diameter, and this minor diameter spring section stretches out in outside the lower surface of conversion dials;
Described spring upper end is shunk and is formed with the needle holder that is used for bearing test anchor clamps probe.
Beneficial effect of the present invention is to have proposed a kind of PCB test machine density conversion method, this method is by throw-over gear of extra interpolation between test fixture and test machine needle-bar, mechanism connects dials by the upper strata and lower floor's conversion line connection board constitutes, connecting dials is provided with and the corresponding bindiny mechanism that resets of test fixture probe,, make therebetween in the time of or relative position taking place in mutual extrusion and change and in time to eliminate the gap by resetting certainly of the bindiny mechanism that resets test fixture probe and good being electrically connected of change-over circuit plate contact by this bindiny mechanism that resets.The conversion line connection board then will be distinguished the contact that corresponding test machine needle-bar probe and test fixture probe be provided with by the winding displacement in it and link to each other, and realize the purpose of density conversion.
Another beneficial effect of the present invention is also to provide a kind of density throw-over gear that is applicable to above-mentioned conversion method, this throw-over gear is two-layer up and down, the upper strata is that a spring connects dials, lower floor is the change-over circuit plate, the circuit board lower floor direct roof pressure in contact is on test machine needle-bar surface-probe, the contact, upper strata then links to each other with the test fixture probe by the spring reverse motion in the spring dials, during test not only the resetting means in the spring dials be in an impaction state, and the probe that the test machine needle-bar protrudes becomes the impaction state of inside indentation under the buffering of its lower spring, make the test fixture probe, can eliminate the gap that be produced by the effect that resets certainly of spring when the trace change takes place the vertical direction relative position between change-over circuit plate contact and test machine needle-bar probe, thereby still keep the good purpose that is electrically connected, the reliability when having increased this throw-over gear practical application greatly therebetween.
[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 a b-b cross-sectional schematic shown in Figure 1.
Fig. 3 is an a-a cross-sectional schematic shown in Fig. 1.
Fig. 4 is that the spring of the specific embodiment of the invention connects dials inner structure synoptic diagram.
[embodiment]
A kind of PCB test machine density conversion method, by a throw-over gear is set between test fixture and test machine needle-bar, this mechanism comprises double-layer structure, and its upper strata is for connecting dials, and lower floor is the conversion line connection board; The corresponding respectively test fixture probe of upper and lower side and the test machine needle-bar probe of conversion line connection board are provided with netted contact, and two terminal contacts are by corresponding linking to each other of conversion line connection board inside conductor; Described connection dials is provided with and the corresponding bindiny mechanism that resets of test fixture probe, by this bindiny mechanism that resets with test fixture probe and good being electrically connected of change-over circuit plate contact.
A kind of PCB test machine density throw-over gear, this density throw-over gear is arranged at 4 of test machine needle-bar 1 and test fixtures, referring to Fig. 1, it comprises two-layer up and down, the upper strata is that spring connects dials 3, lower floor is a change-over circuit plate 2, and spring connects on dials 3 and the lower circuit plate and is stacked and placed on the test machine needle-bar 1.
Described change-over circuit plate 2 comprises basic unit, upper strata and lower floor's three-decker, its upper strata higher test fixture probe 401 of corresponding density is provided with netted contact 201, referring to the b-b cut-open view among Fig. 2,202 of the netted contacts of lower floor are test machine needle-bar probe 101 corresponding are provided with lower with density, referring to the a-a cut-open view in the corresponding diagram 1, its change-over circuit plate 2 levels contacts 201,202 protrusions and circuit board surface and corresponding linking to each other of lead by arranging in the basic unit.
As shown in Figure 4, described spring connects the corresponding test fixture probe 401 of dials 3 upper surfaces and is provided with netted open-end hole 302, through hole 302 internal fixation are provided with spring reverse motion 301, the main body of spring reverse motion is a spring 5 that has better electric conductivity, spring 5 upper ends are formed with the needle holder that is used for bearing test anchor clamps probe 401 a little less than dials 3 upper surfaces and contraction, its lower end is shunk and is formed the spring section of a diameter less than 303 sections internal diameters of boss of through hole 302, and this minor diameter spring section stretches out in outside the lower surface of dials and overhead on the contact 201 on change-over circuit plate 2 upper stratas.
This throw-over gear when in use, spring in its spring line dials is under the compressive state, prevented the clearance issues that it in use may produce between test fixture probe and the terminal contacts on the change-over circuit plate is corresponding thus, this external test machine needle-bar probe 101 its inner spring under the pressure of change-over circuit plate 2 also is in the state of a compression, thereby having guaranteed that test machine needle-bar and change-over circuit plate two ends probe and contact are seen can be under the situation of vertical direction generation relative displacement still guarantee good being electrically connected therebetween.
In sum, the invention provides a kind of simple and effective PCB test machine density conversion method and throw-over gear thereof, this throw-over gear is by the firm and hard conversion purpose that has showed height density measurement point of change-over circuit, and guaranteed that for this change-over circuit plate has disposed spring connection dials the test fixture probe is connected with good electrical between the change-over circuit plate contact.Owing to be to adopt the firm and hard existing density conversion of change-over circuit herein, circuit board is positioned at the contact of test fixture one side except more high density is arranged, also can not be subject to the requirement of consistent in density, but can lay the test point in multiple different densities zone at the corresponding test fixture end in the upper strata of change-over circuit plate according to actual needs, be connected on the unified contact of lower floor's density corresponding by winding displacement conversion in the change-over circuit plate basic unit then, thereby realize the shared test of multi-density with test machine needle-bar probe.It is to be noted at last, because the change-over circuit plate in the throw-over gear involved in the present invention, the annexation of its levels terminal contacts can be adjusted decision by wiring in the basic unit, so throw-over gear circuit board set forth in the present invention can not only realize that the multiple density of corresponding test fixture is shared, can also be implemented under the situation that does not reduce test area by the multiplexing method in contact and highdensity test target changed and carry out corresponding test job.
Claims (6)
1, a kind of PCB test machine density conversion method is characterized in that: a throw-over gear is set between test fixture and the test machine needle-bar, and this throw-over gear comprises double-layer structure, and its upper strata is for connecting dials, and lower floor is the conversion line connection board; Corresponding respectively test fixture probe of described conversion line connection board upper and lower side and test machine needle-bar probe are provided with netted contact, and two terminal contacts are by corresponding linking to each other of conversion line connection board inside conductor; Described connection dials is provided with and the corresponding bindiny mechanism that resets of test fixture probe, by this bindiny mechanism that resets test fixture probe and change-over circuit plate contact is electrically connected.
2, a kind of throw-over gear that is applicable to the described PCB test machine of claim 1 with density conversion method, it is characterized in that: it comprises two-layer up and down, the upper strata is that spring connects dials, and lower floor is the change-over circuit plate, and the upper strata is set up on the lower circuit plate by seat leg and is stacked and placed on the test machine needle-bar; Described spring connects the corresponding test fixture probe of dials upper surface and is provided with netted open-end hole, the through hole internal fixation is provided with spring reverse motion, the main body of spring reverse motion is a spring that has better electric conductivity, the spring upper end is used to contact the test fixture probe, and the lower end overhead is on the corresponding contact on change-over circuit plate upper strata; Described change-over circuit plate comprises basic unit, upper strata and lower floor, the corresponding spring in circuit board upper strata connects the dials through hole and is provided with netted contact, lower floor then is provided with the netted contact of corresponding test machine needle-bar probe, netted contact is used for pressing to touch on test machine needle-bar probe being electrically connected, and is placed with in the change-over circuit plate basic unit to be used for the corresponding lead that links to each other in the contact of levels.
3, throw-over gear as claimed in claim 2 is characterized in that: described change-over circuit plate is a PCB change-over panel, and the contact of its levels protrudes from the surface of pcb board.
4, throw-over gear as claimed in claim 2 is characterized in that: be provided with the boss that is used for the clamping spring reverse motion in the described spring connection dials netted open-end hole.
5, throw-over gear as claimed in claim 4, it is characterized in that: the spring of described spring reverse motion, its upper end is a little less than conversion dials upper surface, the spring lower end is shunk and is formed the spring section of a diameter less than through hole boss section internal diameter, and this minor diameter spring section stretches out in outside the lower surface of conversion dials.
6, throw-over gear as claimed in claim 5 is characterized in that: described spring upper end is shunk and is formed with the needle holder that is used for bearing test anchor clamps probe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810096146A CN101576572B (en) | 2008-05-06 | 2008-05-06 | Density conversion method and density conversion mechanism for PCB test machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810096146A CN101576572B (en) | 2008-05-06 | 2008-05-06 | Density conversion method and density conversion mechanism for PCB test machine |
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| Publication Number | Publication Date |
|---|---|
| CN101576572A true CN101576572A (en) | 2009-11-11 |
| CN101576572B CN101576572B (en) | 2012-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200810096146A Active CN101576572B (en) | 2008-05-06 | 2008-05-06 | Density conversion method and density conversion mechanism for PCB test machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675645A (en) * | 2012-09-25 | 2014-03-26 | 达丰(上海)电脑有限公司 | Two-section type fixture used for circuit board testing |
| CN112605913A (en) * | 2020-12-03 | 2021-04-06 | 九江市海纳电讯技术有限公司 | Duplexer processing is with location frock of PCBA plate body |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19718637A1 (en) * | 1997-05-02 | 1998-11-05 | Atg Test Systems Gmbh | Device and method for testing printed circuit boards |
| CN2660540Y (en) * | 2003-11-07 | 2004-12-01 | 王云阶 | Conducting structure of probe assembly and wire in electronic and detecting implement |
| CN2842428Y (en) * | 2005-03-15 | 2006-11-29 | 深圳麦逊电子有限公司 | Winding beard-needling detachable PCB tester converting board |
| CN101109768A (en) * | 2006-07-17 | 2008-01-23 | 范伟芳 | Improved structure of modularized elastic probe |
| CN101109767A (en) * | 2006-07-17 | 2008-01-23 | 范伟芳 | Improved structure of two sheet type modularized elastic probe |
| CN2938109Y (en) * | 2006-08-16 | 2007-08-22 | 范伟芳 | Improved structure of integral formed conduction probe |
| CN201004081Y (en) * | 2007-01-18 | 2008-01-09 | 王云阶 | Electron and circuit plate detection device |
| CN201199246Y (en) * | 2008-05-06 | 2009-02-25 | 深圳麦逊电子有限公司 | Density changeover mechanism for PCB tester |
-
2008
- 2008-05-06 CN CN200810096146A patent/CN101576572B/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675645A (en) * | 2012-09-25 | 2014-03-26 | 达丰(上海)电脑有限公司 | Two-section type fixture used for circuit board testing |
| CN112605913A (en) * | 2020-12-03 | 2021-04-06 | 九江市海纳电讯技术有限公司 | Duplexer processing is with location frock of PCBA plate body |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101576572B (en) | 2012-08-29 |
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