CN105699879A

CN105699879A - Connection slide glass for testing high-frequency PCB

Info

Publication number: CN105699879A
Application number: CN201610130486.XA
Authority: CN
Inventors: 王立; 陈雨君; 吴文娟; 陆地
Original assignee: Anhui Sun Create Electronic Co Ltd
Current assignee: Anhui Sun Create Electronic Co Ltd
Priority date: 2016-03-08
Filing date: 2016-03-08
Publication date: 2016-06-22
Anticipated expiration: 2036-03-08
Also published as: CN105699879B

Abstract

The invention belongs to the field of the printed circuit board (PCB) testing and detecting technology and particularly relates to a connection slide glass for testing a high-frequency PCB. The connection slide glass comprises a plugboard. The end surface of one side of the plugboard, oriented towards a to-be-tested PCB, is fixedly provided with a microstrip board. The surface of the other side of the plugboard is oriented towards the to-be-tested PCB. The surface of the microstrip board, oriented towards the to-be-tested PCB, is in the form of a guide sheet fixing surface. The impedance of the microstrip board is equal to the impedance of the to-be-tested PCB. When a metal elastic sheet is flattened to be in a plane shape under the effect of a downward force and/or a raising force, the connection slide glass is in the working state. In the above working state, the surface of the metal elastic sheet, oriented towards the microstrip board, is attached onto the guide sheet fixing surface of the microstrip board. Meanwhile, the surface of the metal elastic sheet, oriented towards the to-be-tested PCB, is simultaneously attached to a test point of the to-be-tested PCB and a leading-out point of a signal lead-out board. The connection slide glass is high in test accuracy, good in standing-wave ratio, better in isolating degree, large in bearing power, and low in power consumption. Meanwhile, the connection slide glass is stable and reliable in performance.

Description

A kind of frequency PCB board test is with connecting slide glass

Technical field

The invention belongs to the test of pcb board and detection field, be specifically related to a kind of frequency PCB board test and connect slide glass。

Background technology

Pcb board, is the abbreviation of printed circuit board (PCB), is also card, is the critical piece of most of electronic products。At all electronic products before dispatching from the factory, in the use procedure after even dispatching from the factory, all along with a series of performance test, to find in advance and to fix a breakdown, and then ensureing product quality, pcb board is all the more so。In the test platform for pcb board especially frequency PCB plate, rf probe test mode is the most general；The patent of invention text that this is the patent name of " CN102221376A " at such as Chinese patent notification number is " a kind of pcb board test fixture ", and Chinese patent notification number be " CN102707182A " patent name be " a kind of pcb board measurement jig " patent of invention text in all have described by: include can be movable toward each other upper and lower mould, at least one place of the forward surface of upper and lower mould arranges needle plate, and needle plate is arranged with rf probe array and formed。During work, with the test point on the tip alignment of rf probe pcb board to be tested, thus play the signal extraction purpose of test instrunment to external world with rf probe body。But, along with developing rapidly of society's science and technology, the miniaturization of pcb board and integrated be trend of the times, the pcb board possessing huge intensive test point can be found everywhere。Traditional rf probe inherently possesses certain diameter, some arranges the fixed structures such as flange even at end, above-mentioned rf probe unitizes owing to cannot be carried out structure, how quickly to seek to the particular radio-frequency probe with pcb board impedance matching to be measured to become a difficult problem, when often causing because selecting reluctantly testing, standing-wave ratio is too low, and test accuracy is affected therewith。Similarly, since the densification of test point, when the test point spacing of adjacent two radio frequencies of pcb board to be measured is closer, the common ground between conventional rf probe and test fixture cannot meet test request, and this can cause that test data are unreliable；Or owing to adjacent test point distance too closely rf probe interference occurs, and then cause the situation occurring installing rf probe。In addition, conventional rf probe, due to self simple material-structure, also cannot be applicable to the occasion that the tested port power of frequency PCB plate is bigger at all。Finally, the technology of high-frequency radio frequency probe is usually external monopolization, and procurement cycle is long and expensive, it is clear that the requirement such as product development cycle and the cost control that also cannot meet current producer, the actual test of frequency PCB plate is also created certain impact by this。

Summary of the invention

The purpose of the present invention is for overcoming above-mentioned the deficiencies in the prior art, it is provided that a kind of rational in infrastructure and reliable frequency PCB board test connects slide glass。This connection slide glass is mountable in current conventionally test platform, and possess test accuracy height, the series of advantages such as standing-wave ratio is good, isolation is good, it is big to bear power, power attenuation is low, its stable performance and reliable。

For achieving the above object, present invention employs techniques below scheme:

A kind of frequency PCB board test is with connecting slide glass, it is characterised in that: the plate on upper mould that this connection slide glass at least includes being securable to PCB test platform and/or counterdie；A side end face towards pcb board to be measured of plate is fixed with the impedance connecting portion for drawing bridge at the catch cropping signal of pcb board to be measured with signal end tab；Described impedance connecting portion includes micro-strip plate, micro-strip plate one side surface be fixed on the above-mentioned end face of plate and opposite side surface towards pcb board place to be measured, the surface towards pcb board to be measured of micro-strip plate is guide card stationary plane, and the impedance of micro-strip plate is equal to pcb board impedance to be measured；Impedance connecting portion also includes the wavy metal clips being located between micro-strip plate and pcb board to be measured；Driving impedance connecting portion affixed with it jointly to produce down pressure and/or vertical motion with plate, metal clips is oppressed pcb board to be measured and is flattened in time plane with signal end tab pressurized, for the duty of this connection slide glass；Under above-mentioned duty, the face, surface towards micro-strip plate in plane metal clips that flattens fits in the guide card stationary plane of micro-strip plate, and the surface towards pcb board to be measured of the metal clips test point that fit on pcb board to be measured in face simultaneously draws the leading point of plate with signal。

Plate profile is rectangular-shaped, and on the slide rail being used as upper mould being plugged in PCB test platform of its length direction vertical；Micro-strip plate upper surface profile in plate lower surface profile coincide rectangle, micro-strip plate upper surface is provided with two installing holes along its length, installing hole vertical to from bottom to top run through micro-strip plate plate face and recessed plate lower surface place；Metal clips profile is that the inverted " V " shape stuck up is rolled over downwards at two ends, and the stage casing welding machine of metal clips is fixed in micro-strip plate lower surface place；Being filled with elastic insulated pad post in two installing holes, the prominent micro-strip plate lower surface of this elastic insulated pad post also bears against two the folding section of sticking up places in metal clips。

Described installing hole vertical to run through plate plate body；The installing hole profile being positioned at plate presents the sector hole footpath two-period form shoulder hole structure more than hypomere aperture, and elastic insulated pad post profile is in the ladder shaft-like adaptive with above-mentioned shoulder hole structure；The columned depression bar arranged for pushing against elastic insulated pad post is filled being positioned at the installing hole above elastic insulated pad post；The upper surface of plate is provided with the jacking block for pushing against depression bar, constitutes the affixed cooperation of screw thread between the two。

The bottom face that described installing hole continues along jacking block is recessed to form counter bore structure at jacking block place；The center vertical of the top end face of jacking block runs through and arranges screw mounting hole, trip bolt vertical to from top to bottom through screw mounting hole and with constitute between plate upper surface that screw thread is affixed to be coordinated。

The both sides place at the upper surface place of plate has been symmetrically extended fixing ear, two fixing ears are all provided through vertical to pilot hole, guide post from top to bottom through this pilot hole to be screwed on above-mentioned slide rail；The shaft place of guide post arranges that compression spring, the upper end of compression spring are resisted against the nut place, top of guide post and lower end is resisted against the upper surface place of fixing ear。

The impedance of described micro-strip plate is 50 Ω。

The beneficial effects of the present invention is:

1), it is different from the rf probe structure that tradition necessarily adopts, the present invention possesses plane and the metal clips of wavy two kinds of deformed state with unique, coordinate only when metal clips deforms upon and flattens can the micro-strip plate of face laminating with it, thus realizing being positioned at the pcb board to be measured being arranged side by side below metal clips and the signal conduction mated under impedance between signal end tab and test transmission purpose。Compared with such as using pcb board test operation that is loaded down with trivial details and that be not suitable under high-power situation with traditional probe in detecting mode is brought: the present invention, based on realizing without the high-accuracy PCB on-line testing demand under probe premise, takes full advantage of high deformation behavior and high resiliency that metal clips its own resilient brings。Under the corresponding mould of PCB test platform drives, metal clips or reply wavy thus separating pcb board to be measured and micro-strip plate, and separate signal end tab and micro-strip plate。Or be flatten shape because of corresponding upper and lower molding pressure, finally connect pcb board to be measured, micro-strip plate and signal end tab completely。The elastic buffer of of metal clips itself also ensure that under the protection for fragile pcb board。Its flexible movements, respond fast, and the accuracy of test is high, is more suitable for the testing requirement of high-frequency high-power pcb board。

It is worthy of note, just now just frequently as connection bridge beam when metal clips should be at complete flat, and connect the test point of pcb board to be measured and the leading point of signal end tab。On the one hand, only metal clips fit completely micro-strip plate in other words conj.or perhaps guide card thereon time, whole " bridge " is just under the state consistent with pcb board impedance to be measured；And under the state only having this impedance matching, follow-up test data are just meaningful。On the other hand, metal clips is completely spread out laminating micro-strip plate, and the implementation of this kind of premise can be tested than the laminating of " part " metal clips, it is clear that operates more convenient。During concrete operations, this only need to connect slide glass is maximized is tightly pressed against pcb board to be measured and signal end tab place, it may be achieved property is obviously higher, is also more suitable for industrialized design and production。

To sum up, the present invention can individually be fixed on pcb board test platform, have that cost is low, easy to process, assembly period is short, versatility is high, it is respond well to test, be easy to the series of advantages such as maintenance replacing, can effectively meet the test of current pcb board, especially be filled with the blank testing of current high-frequency high-power pcb board, its stable performance and reliable。

2), under the mould drive actions of pcb board test platform, the present invention, using plate as main body, arranges fixing ear on the one hand along plate both sides, thus what realize between the present invention and current PC B board test platform is effectively affixed；On the other hand, vertical in plate arrange installing hole, the metal clips of collocation inverted " V " shape, the precompression for this metal clips that achieves of optimization keeps effect, thus facilitating the elasticity under metal clips precompressed reset at nominal conditions and duty to flatten effect。By said structure, the present invention not only further meets the frequency PCB testing requirement under electric current high-power, big；Simultaneously, adopt fixing ear and installing hole the two resiliency in position, arrange in pairs or groups the Flexible Design of four points of two elastic insulated pad posts and two compression springs, thus that can pass through that pointwise freely adjust with each point elastic force is naturally supplementary, when avoiding metal clips to connect pcb board to be measured with signal end tab the pressure that may result in uneven with contact the problems such as insufficient, thus better meeting above-mentioned test request。

3), elastic insulated pad post, it is provided that metal clips precompression in normal state, it relies on depression bar against elastic insulated pad post on the one hand, thus ensure that this elastic insulated pad post elasticity pressure effect between metal clips and depression bar；On the other hand, elastic insulated pad post itself, as insulator, also ensure that the current signal sent by the test point of pcb board to be measured, is unlikely to directly to be dissipated into along elastic insulated pad post the plate place of metal, and then has influence on the accuracy of actual test data。During installation, relying on and be first placed into elastic insulated pad post along installing hole, place into depression bar and compress, compress the mode of depression bar again through jacking block, can complete above-mentioned installation operation, its operation is obviously extremely convenient, and functional reliability and stability also can be effectively ensured。

Accompanying drawing explanation

Fig. 1 is the perspective view of the present invention；

Fig. 2 is the Facad structure figure of the present invention；

Fig. 3 is the structure sectional view of Fig. 2；

Fig. 4 is that the present invention is in original state, namely operating diagram when metal clips is in normal condition；

Fig. 5 is the I part partial enlarged drawing of Fig. 4；

Fig. 6 is that the present invention is in contact Pre strained state namely operating diagram during metal clips generation compressive deformation process；

Fig. 7 is the II part partial enlarged drawing of Fig. 6；

Fig. 8 is that the present invention is in running order, namely operating diagram when the complete stress of metal clips flattens；

Fig. 9 is the III part partial enlarged drawing of Fig. 8。

In accompanying drawing, each label is as follows with each component names corresponding relation of the present invention:

A-pcb board to be measured b-signal end tab

A-slide rail B-testing base

10-plate 11-fixes ear 21-micro-strip plate 22-metal clips

30-elastic insulated pad post 40-depression bar

50-jacking block 60-trip bolt

70-guide post 80-compresses spring

Detailed description of the invention

For ease of understanding, here in connection with accompanying drawing, specific embodiment of the invention structure and workflow are described below:

The concrete structure of the present invention, as Figure 1-3, it includes two guide posts 70, two, 80, one, spring of compression, 40, two elastic insulated pad post 30, Block-matching of 10, jacking block of plate, 60, two depression bars of 50, trip bolt with symmetrical fixing ear 11 to rectangular metal clips 22 in " V " shape of the micro-strip plate 21, a piece of 50 Ω impedances。During assembling, based on plate 10, in installing hole first within it, insert elastic insulated pad post 30 and depression bar 40 successively, and by trip bolt 60, jacking block 50 is enclosed within the revealed section place, top of depression bar 40, to compress depression bar 40。Now due to the contention effect of jacking block 50 and depression bar 40, elastic insulated pad post 30 is extruded, and the bottom part of elastic insulated pad post 30 exposes the lower surface of micro-strip plate 21 simultaneously。Micro-strip plate 21 is welded on plate 10 lower surface, and at the lower surface place of micro-strip plate 21 solid welding metal clips 22 again, and the folding section of sticking up making the two ends of metal clips 22 downward bears against at the exposed junction place of above-mentioned elastic insulated pad post 30。The profile of metal clips 22 can be direct " V " word structure, also contemplate at the two ends of " V " word extension turnup structure reversely with each other or rounding off structure again, as shown in Figures 1 and 3, so that when touching the pcb board a to be measured and signal end tab b of lower section so that both contact actions are more smooth。Wearing guide post from top to bottom successively on the fixing ear of the two of plate 10, guide post is the bolt structure that there is nut on top。Sheathed compression spring 80 on guide post 70, and the two ends of compression spring 80 are born against the nut place of guide post 70 and the upper surface place of fixing ear 11, so that each forms integral spring construction。

Actual mechanical process of the present invention is as follows:

1), check pcb board test platform, and pcb board a to be measured and signal end tab b is arranged in parallel on the testing base B of pcb board test platform successively。

2), the guide post 70 of the present invention is screwed on the slide rail A place of pcb board test platform so that the hole that plate 10 is from top to bottom reserved on slide rail A。Slide rail A is fixed on the top of above-mentioned testing base B and is connected with the power drive portion of platform。Now metal clips 22 is located just at pcb board a to be measured and the surface of signal end tab b。Pre strained state shown in this state namely Fig. 4-5, now metal clips 22 only to be limited by the power that slightly compresses of elastic insulated pad post 30 and depression bar 40 such that it is able to keeps normal " V " shape structure。

3), when whole slide rail A is subject to the power in above-mentioned power drive portion and moves down, metal clips 22 stress gradually is descending, two folding sections of sticking up of metal clips 22 touch pcb board a to be measured and the upper surface of signal end tab b first respectively, and start to be subject to the two feedback force, and then produce deformation。Now, under optimized situation, being also only that metal clips 22 turns on pcb board a to be measured and signal end tab b, this state is contact Pre strained state, as shown in fig. 6-7。Under this state, owing to micro-strip plate 21 is not engaged in turn on process, therefore only do not mate the impedance of pcb board a to be measured completely with the impedance of metal clips 22, so there is no measuring and calculating meaning。

4), slide rail A continue descending, metal clips 22 continues stress, until in complete flat。Now, not only elastic insulated pad post 30 is via slight stress is to the forced compression shown in Fig. 8-9 to extreme position as shown in fig. 6-7, and meanwhile, the compression spring 80 on guide post 70 is also stretched to the default limit and replys position。Under the huge restoring force effect of compression spring 80 and elastic insulated pad post 30, the guide card stationary plane place that metal clips 22 is fitted on micro-strip plate 21 completely, this state reaches to meet the conducting state of requirement, is also the duty shown in Fig. 8-9。Under this state, 50 Ω impedances of micro-strip plate 21 self just match the 50 Ω impedances of pcb board a to be measured, circuit turn-on, and the transition transmission of radiofrequency signal is achieved, and possesses test meaning, it is possible to carry out follow-up a series of test。

In summary, present invention have an advantage that

1), the present invention be designed with spring-piece type overlap joint transmission structure, the frequency PCB testing requirement of electric current high-power, big can be met。

2), the present invention devise the micro-strip plate of 50 Ω impedance matchings, well ensure that transmission performance, reach good mating with test device and Meter Test system impedance；It is simultaneously achieved the test of the pcb board of Small Distance pad, is also that reliably continuous must the test of large batch of pcb board provides powerful guarantee simultaneously。

3), the present invention adopts compression spring to coordinate four point elasticity designs of elastic insulated pad post, can pass through adjust depression bar length or even adjust elastic insulated pad column length, what change that two folding sections of sticking up of the metal clips under original state are subject to compresses power, thus avoiding metal clips when connecting pcb board to be measured and signal end tab, the pressure that be may result in uneven with contact the problems such as insufficient, thus meeting test request preferably。

4), the initial designs thinking of the present invention, can individually be fixed on PCB test platform, thus having possessed, cost is low, easy to process, assembly period is short, versatility is higher, it is respond well to test, be easy to the advantages such as maintenance replacing, it is possible to meet most of pcb board testing requirement。Simultaneously as the uniqueness of present configuration, so as to be provided simultaneously with the advantages such as test accuracy is high, standing-wave ratio is good, isolation is good, it is big to bear power, power attenuation is low, its service behaviour is extremely reliable and stable。

Claims

1. a frequency PCB board test is with connecting slide glass, it is characterised in that: the plate (10) on upper mould that this connection slide glass at least includes being securable to PCB test platform and/or counterdie；A side end face towards pcb board to be measured of plate (10) is fixed with the impedance connecting portion for drawing bridge at the catch cropping signal of pcb board to be measured with signal end tab；Described impedance connecting portion includes micro-strip plate (21), micro-strip plate (21) one side surface is fixed on plate (10) above-mentioned end face and opposite side surface towards pcb board place to be measured, the surface towards pcb board to be measured of micro-strip plate (21) is guide card stationary plane, and the impedance of micro-strip plate (21) is equal to pcb board impedance to be measured；Impedance connecting portion also includes the wavy metal clips (22) being located between micro-strip plate (21) and pcb board to be measured；Driving impedance connecting portion affixed with it jointly to produce down pressure and/or vertical motion with plate (10), metal clips (22) is oppressed pcb board to be measured and is flattened in time plane with signal end tab pressurized, for the duty of this connection slide glass；Under above-mentioned duty, the face, surface towards micro-strip plate (21) in plane metal clips (22) that flattens fits in the guide card stationary plane of micro-strip plate (21), and the surface towards pcb board to be measured of metal clips (22) test point that fit on pcb board to be measured in face simultaneously draws the leading point of plate with signal。

2. a kind of frequency PCB board test according to claim 1 connects slide glass, it is characterised in that: plate (10) profile is rectangular-shaped, and on the slide rail being used as upper mould being plugged in PCB test platform of its length direction vertical；Micro-strip plate (21) upper surface profile is in the rectangle identical with plate (10) lower surface profile, micro-strip plate upper surface is provided with two installing holes along its length, installing hole vertical to from bottom to top run through micro-strip plate (21) plate face and recessed plate (10) lower surface place；Metal clips (22) profile is that the inverted " V " shape stuck up is rolled over downwards at two ends, and the stage casing welding machine of metal clips (22) is fixed in micro-strip plate (21) lower surface place；Being filled with elastic insulated pad post (30) in two installing holes, prominent micro-strip plate (21) lower surface of this elastic insulated pad post (30) also bears against two the folding section of sticking up places in metal clips (22)。

3. a kind of frequency PCB board test connection slide glass according to claim 2, it is characterised in that: described installing hole vertical to run through plate (10) plate body；The installing hole profile being positioned at plate (10) presents the sector hole footpath two-period form shoulder hole structure more than hypomere aperture, and elastic insulated pad post (30) profile is in the ladder shaft-like adaptive with above-mentioned shoulder hole structure；Installing hole in the top being positioned at elastic insulated pad post (30) is filled layout and is used for pushing against the columned depression bar (40) of elastic insulated pad post (30)；The upper surface of plate (10) is provided with the jacking block (50) for pushing against depression bar (40), constitutes the affixed cooperation of screw thread between the two。

4. a kind of frequency PCB board test according to claim 3 connects slide glass, it is characterised in that: the bottom face that described installing hole continues along jacking block (50) is recessed to form counter bore structure at jacking block (50) place；The center vertical of the top end face of jacking block (50) runs through and arranges screw mounting hole, trip bolt (60) vertical to from top to bottom through screw mounting hole and with constitute between plate (10) upper surface that screw thread is affixed to be coordinated。

5. a kind of frequency PCB board test according to Claims 2 or 3 or 4 connects slide glass, it is characterized in that: the both sides place at the upper surface place of plate (10) has been symmetrically extended fixing ear (11), two fixing ears (11) are all provided through vertical to pilot hole, guide post (70) from top to bottom through this pilot hole to be screwed on above-mentioned slide rail；The shaft place of guide post (70) arranges that compression spring (80), the upper end of compression spring (80) are resisted against the nut place, top of guide post (70) and lower end is resisted against the upper surface place of fixing ear (11)。

6. a kind of frequency PCB board test according to claim 1 or 2 or 3 or 4 connects slide glass, it is characterised in that: the impedance of described micro-strip plate (21) is 50 Ω。