CN201269888Y - Tool for printed circuit board assembling test - Google Patents
Tool for printed circuit board assembling test Download PDFInfo
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- CN201269888Y CN201269888Y CNU200820134852XU CN200820134852U CN201269888Y CN 201269888 Y CN201269888 Y CN 201269888Y CN U200820134852X U CNU200820134852X U CN U200820134852XU CN 200820134852 U CN200820134852 U CN 200820134852U CN 201269888 Y CN201269888 Y CN 201269888Y
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Abstract
The utility model discloses a tool for testing PCBA assembled in a printed circuit board; the tool comprises a testing-board box, a connecting plate, a testing clamp positioning device and a flat-board compressing device; wherein, the testing-board box is provided with a terminal connector; the connecting plate is vertically arranged at one side of the testing-board box; the flat-board compressing device is positioned at the upper end of the connecting plate; a compressing board with a cylindrical pressing block is arranged at the bottom of the flat-board compressing device which is used for controlling the compressing board with the cylindrical pressing block to move up and down along the connecting plate; the testing clamp positioning device is located between the flat-board compressing device and the testing-board box and is positioned on the testing-board box; the bottom of the testing clamp positioning device is fixed with a probe sheath which is connected with the terminal connected by a signal wire; and when force is imposed downwards on the flat-board compressing device, the compressing board with the cylindrical pressing block controls the PCBA arranged in the testing clamp positioning device to move downwards so that a testing contact on the PCBA is in contact with the probe. With the adoption of the tool, the testing reliability and testing speed of the PCBA can be improved.
Description
Technical field
The utility model relates to testing apparatus, the instrument of particularly a kind of testing printed circuit board assembling (PCBA, Printed Circuit Board Assembly).
Background technology
Along with the development of mobile communication technology and the universal use of digital product, the output of all kinds of PCBA also increases sharply, with the vehicle-mounted digital television is example, because its mobility that has, can provide a large amount of information for the people of trip, obtained widely using, made the output of vehicle-mounted digital television sharply rise, made the output of PCBA of vehicle-mounted digital television also sharply rise thereupon.
In the prior art, PCBA functional test for vehicle-mounted digital television, the general manual test method that adopts, promptly manually the contact element signal wire is tested in loading and unloading, by the terminal connector that adopts to have test board, this terminal connector comprises terminal connectors such as S terminal, power supply terminal, serial ports terminal and sound signal terminal, and each the corresponding test contact on the PCBA of this terminal connector and vehicle-mounted digital television to be measured manually is connected by signal wire, tests then.
By the PCBA method of above-mentioned existing manual test vehicle-mounted digital television as seen, the manual test contact element signal wire of pegging graft, grafting efficient is low, and test speed is slow; On manual connection PCB A in the process of test contact and terminal connector connecting line, fragile test connecting line, it is bigger to make test result influenced by human factor, can not truly reflect the PCBA testing reliability of vehicle-mounted digital television, and testing reliability is relatively poor.Therefore, be difficult to satisfy the demand of the PCBA functional test of the vehicle-mounted digital television of producing in enormous quantities on the production line.
The utility model content
In view of this, fundamental purpose of the present utility model is to provide a kind of instrument of testing printed circuit board assembling, improves testing reliability and the test speed of PCBA.
For achieving the above object, the utility model provides a kind of instrument of testing printed circuit board assembling, comprising: test board box, web joint, test fixture locating device and dull and stereotyped press fit device, wherein,
In the test board box terminal connector is set;
Web joint stands up in test board box one side;
Dull and stereotyped press fit device is positioned the web joint upper end, and dull and stereotyped press fit device bottom is provided with the pressing plate that has the cylinder briquetting, and dull and stereotyped press fit device is used to control the pressing plate that has the cylinder briquetting and moves up and down along web joint;
The test fixture locating device, be positioned in the middle of dull and stereotyped press fit device and the test board box, be positioned on the test board box, the bottom is fixed with the probe set that is connected by signal wire with terminal connector, when the downward application of force of dull and stereotyped press fit device, have the PCBA that the pressing plate control of cylinder briquetting is placed in the test fixture locating device and move down, the test contact on the PCBA is contacted with probe.
As seen from the above technical solutions, the instrument of a kind of testing printed circuit board assembling that the utility model provides, by in the test board box, terminal connector being set, web joint stands up in test board box one side, dull and stereotyped press fit device is positioned the web joint upper end, dull and stereotyped press fit device bottom is provided with the pressing plate that has the cylinder briquetting, being used to control the pressing plate that has the cylinder briquetting moves up and down along web joint, the test fixture locating device, be positioned in the middle of dull and stereotyped press fit device and the test board box, be positioned on the test board box, the bottom is fixed with the probe set that is connected by signal wire with terminal connector, when the downward application of force of dull and stereotyped press fit device, have the PCBA that the pressing plate control of cylinder briquetting is placed in the test fixture locating device and move down, the test contact on the PCBA is contacted with probe.The demand of the PCBA functional test of the vehicle-mounted digital television of producing in enormous quantities on the production line is satisfied in the PCBA functional test that have simple in structure, easy to adjust, accurate positioning, testing reliability height, mounting or dismounting are convenient, test speed is fast, can be applicable to plurality of specifications.
Description of drawings
Fig. 1 is the instrument perspective view of a kind of testing printed circuit board assembling of the utility model;
Fig. 2 is the instrument spatial structure decomposing schematic representation of a kind of testing printed circuit board assembling of the utility model;
Fig. 3 is the instrument Facad structure synoptic diagram of a kind of testing printed circuit board assembling of the utility model;
Fig. 4 is the instrument side structural representation of a kind of testing printed circuit board assembling of the utility model.
Label declaration in the accompanying drawing
01, test fixture locating device 02, dull and stereotyped press fit device
1, test board box 2, web joint
3, base plate 4, activity orientation flat board
5, pressing plate 6, link iron plate
7, countershaft is led in cylinder briquetting 8, slip
9, movable axis 10, axle bed
11, monkey wrench 12, handle
13, bearing pin 14, screw
15, probe aperture 16, ladder locating slot
17, finger position recess
19, switch 20, connecting rod
21, monkey wrench fixed head 22, compression spring
23, adjust screw 24, monkey wrench fixed support
25, USB interface 26, serial ports terminal
27, S terminal 28, audio frequency terminal
29, DC terminal 30, signal wire
31, antennal interface 32, detent
33, probe set pilot hole 34, adjustment screw hole
35, chained block 36, chained block screw hole
37, screw hole 38, monkey wrench fixed head axle bed
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the utility model is described in further detail.
The instrument of a kind of testing printed circuit board assembling that the utility model proposes, by printed circuit board (PCB) being assembled the method for exerting pressure in Embedded contraposition and upper end, to have complete manual grafting test contact element signal wire and test contact connecting line now and be improved to the anchor clamps assignment test, novelty simple in structure, easy to adjust, accurate positioning, dependable performance can be applicable to the PCBA test industry of PCBA test and debugging.
Below be that example describes with the PCBA functional test of vehicle-mounted digital television.
Fig. 1 is the instrument perspective view of a kind of testing printed circuit board assembling of the utility model, among the figure, vertical direction is an above-below direction of the present utility model, and horizontal direction is a left and right directions of the present utility model, towards paper and dorsad the direction of paper be fore-and-aft direction of the present utility model.
Referring to Fig. 1, the instrument of this a kind of testing printed circuit board assembling comprises: test board box 1, web joint 2, test fixture locating device 01 and dull and stereotyped press fit device 02, wherein,
Be provided with terminal connector in the test board box 1;
Dull and stereotyped press fit device 02 is positioned web joint 2 upper ends, and dull and stereotyped press fit device 02 bottom is provided with the pressing plate that has the cylinder briquetting, and dull and stereotyped press fit device 02 is used to control pressing plate and moves up and down along web joint 2;
It is middle with test board box 1 that test fixture locating device 01 is positioned at dull and stereotyped press fit device 02, be positioned on the test board box 1, the bottom is fixed with the probe set that is connected by signal wire with terminal connector, when the downward application of force of dull and stereotyped press fit device 02, have the printed circuit board (PCB) assembling that the pressing plate control of cylinder briquetting is placed in the test fixture locating device 01 and move down, the test contact of printed circuit board (PCB) fit on is contacted with probe.
Fig. 2 is the instrument spatial structure decomposing schematic representation of a kind of testing printed circuit board assembling of the utility model, Fig. 3 is the instrument Facad structure synoptic diagram of a kind of testing printed circuit board assembling of the utility model, and Fig. 4 is the instrument side structural representation of a kind of testing printed circuit board assembling of the utility model.Referring to Fig. 2, in conjunction with referring to Fig. 3 and Fig. 4, wherein,
Switch 19 is arranged on test board box right side, and startup or disconnection are to the test of the PCBA of vehicle-mounted digital television;
When the downward application of force of dull and stereotyped press fit device 02, the test contact on the PCBA is with after probe contacts, and switch connection starts test, and after test was finished, switch disconnected.
Antennal interface 31 is arranged on test board box left side, and radiofrequency signal transfers to PCBA by the antennal interface of offering and goes up corresponding antenna contacts;
USB interface 25, serial ports terminal 26, S terminal 27, audio frequency terminal 28 and DC terminal 29 are arranged on test board box rear side, form terminal connector, link to each other with the probe that is fixed on test fixture locating device 01 bottom by signal wire 30, probe is gone up corresponding test contact with the PCBA that moves down again and is contacted, and PCBA is carried out functional test.
In the practical application, place the position of switch, terminal connector and antennal interface at the test board box and also can select according to actual needs.
Test fixture locating device 01 comprises: base plate 3 and activity orientation flat board 4,
Base plate 3, be positioned over test board box 1 upper end, have the detent 32 of placing activity orientation flat board 4 on the base plate 3, detent 32 is a clearance fit with activity orientation dull and stereotyped 4, in detent 32 bottoms, offer the probe set pilot hole 33 of ccontaining probe, by the probe in signal wire 30 splicing ear connectors and the probe set pilot hole 33.
Also offer the adjustment screw hole 34 of ccontaining adjustment screw 23 on the base plate 3, compression spring 22 is socketed on to be adjusted outside the screw 23, and an end of compression spring 22 contacts with dull and stereotyped 4 bottoms of activity orientation, and the other end contacts with test board box 01 by adjusting screw hole 34;
In the practical application, place in the adjustment screw hole of offering on base plate 3 34 and adjust screw 23, adjust screw 23 outer socket compression springs 22, an end of compression spring 22 contacts with dull and stereotyped 4 bottoms of activity orientation, and the other end contacts with the base plate 3 of adjusting screw hole 34 bottoms.
Preferably, the quantity of the adjustment screw hole of offering on base plate 3 34 is four, be distributed in base plate 3 around.
Activity orientation flat board 4 is provided with the ladder locating slot 16 of placing PCBA, offer the probe aperture 15 of placing probe in ladder locating slot 16 bottoms, probe aperture 15 is corresponding with probe set pilot hole 33, the position of offering is corresponding with the test contact position on the PCBA, when the downward application of force of dull and stereotyped press fit device, probe contacts with test contact on the PCBA by probe aperture 15;
The probe aperture 15 that is opened on the activity orientation flat board 4 is corresponding about in the of 33 with probe set pilot hole on being opened in base plate 3.
Preferably, on activity orientation flat board 4, also offer finger position recess 17, be used for after end of test (EOT), take out PCBA from finger position recess 17.
Preferably, the ladder locating slot 16 of the placement PCBA that establishes in the activity orientation flat board 4 can be for a plurality of, in order to be applicable to the PCBA functional test of plurality of specifications, for example, be applicable to the PCBA functional test of national standard and European standard, the PCBA size of each step trough size and corresponding specification adapts.
In the practical application, the test fixture locating device also can include only the activity orientation flat board, on the activity orientation flat board, offer the ladder locating slot of placing PCBA, offer the probe aperture of placing probe in ladder locating slot bottom, the position that probe aperture is offered is corresponding with the test contact position on the PCBA, adjusts screw retention on the test board box, and compression spring is socketed on to be adjusted outside the screw, one end of compression spring contacts with the dull and stereotyped bottom of activity orientation, and the other end contacts with the test board box; When the downward application of force of dull and stereotyped press fit device, cylinder briquetting control PCBA on the pressing plate of dull and stereotyped press fit device bottom and the activity orientation flat board of placement PCBA overcome compression spring and move down, and the test contact probe interior with being placed in probe aperture on the PCBA contacted.
In the practical application,, make probe aperture 15 positions corresponding, just the utility model can be applied to other PCBA functional test with corresponding PCBA test contact position by changing probe aperture 15 positions that ladder locating slot 16 bottoms are offered.
Dull and stereotyped press fit device 02 comprises: link iron plate 6, movable axis 9, connecting rod 20, monkey wrench fixed head 21, monkey wrench 11 and pressing plate 5,
Link iron plate 6 is fixed on the web joint 2, and the part of link iron plate 6 extends to form monkey wrench fixed head axle bed 38 along the place ahead, offer the through hole of vertical perforation on the monkey wrench fixed head axle bed 38, is used for ccontaining movable axis 9;
Preferably, link iron plate 6 also can be connected with web joint 2 by chained block 35, chained block 35 is fixed on the web joint 2, chained block 35 offers chained block screw hole 36, link offers screw hole 37 on the iron plate 6, is placed in that screw hole 37 and chained block screw hole 36 interior screws 14 will link iron plate 6 and chained block 35 is spirally connected fixing.
Preferably, monkey wrench fixed head axle bed 38 quantity that link iron plate 6 extends to form along the place ahead are two, are used for further improving the stability that movable axis 9 moves up and down.
Movable axis 9 bottoms are by being spirally connected or welding fixation clip 5, pressing plate 5 bottoms are fixed with cylinder briquetting 7, the quantity of cylinder briquetting 7 can be determined according to actual needs, cylinder briquetting 7 is used for moving down in company with pressing plate 5 when movable axis 9 moves down, and contacts and press down PCBA with PCBA upper surface in being placed on the activity orientation flat board.
Movable axis 9 tops offer groove, ccontaining connecting rod 20 bottoms in the groove, and by bearing pin 13 and connecting rod 20 bottom pin joints;
Connecting rod 20 tops and handle 12 1 ends are placed in the groove that monkey wrench fixed head 21 offers, connecting rod 20 tops are by bearing pin 13 and monkey wrench fixed head 21 middle part pin joints, and the handle 12 that is placed in the monkey wrench 11 passes through bearing pin 13 and monkey wrench fixed head 21 top pin joints;
Monkey wrench fixed head 21 bottoms are placed in the groove that monkey wrench fixed support 24 offers, by bearing pin 13 and monkey wrench fixed support 24 pin joints that are fixed on the web joint 2.
Preferably, this flat board press fit device also comprises: slide and lead countershaft 8 and axle bed 10;
Offer the through hole of vertical perforation on pressing plate 5, and boring is led countershaft 8 with ccontaining slip on base plate 3, leads the part that countershaft 8 stretches out pressing plate 5 upper ends in slip, socket is used for the axle bed 10 of stop bit.
Pressing plate 5 is led countershaft 8 along sliding and is moved up and down, can further increase the stability that pressing plate 5 moves down, and uniform force application when cylinder briquetting 7 on the pressing plate 5 is contacted with PCBA, assurance is applied to PCBA, and upward each test contact contact pressure is even, the inconsistent test result error that causes of each test contact contact pressure when avoiding manual test has improved the reliability of test.
Preferably, the cylinder briquetting is a Teflon cylinder briquetting, and pressing plate, activity orientation flat board, test board box, web joint all are made by organic glass.
It is as follows below brief description to be carried out in the operation of the instrument of a kind of testing printed circuit board of the utility model assembling:
The probe set pilot hole of at first offering on probe aperture of offering by activity orientation flat board 4 15 and the pressing plate 3 33 is placed probes, in probe set pilot hole 33 bottoms, connects the terminal connector that needs test by signal wire 30.
Then, tested PCB A is put into the ladder locating slot 16 of activity orientation flat board 4, PCBA has master chip and test contact one faces down.
Then, manually press down monkey wrench 11, monkey wrench 11 drives handles 12, with the monkey wrench fixed head 21 of handle 12 pin joints, with the connecting rod 20 of monkey wrench fixed head 21 pin joints, with the movable axis 9 of connecting rod 20 pin joints, move down with the fixing pressing plate 5 in movable axis 9 bottoms, wherein, movable axis 9 leads by monkey wrench fixed head axle bed 38, pressing plate 5 is led countershaft 8 by slip and is led, and has increased the stability that pressing plate 5 moves down.On the pressing plate 5 fixing cylinder briquetting 7 move down be placed on the step trough 16 that the activity orientation flat board offers in the PCBA upper surface contact, and under the effect of the monkey wrench 11 downward application of forces, the elastic force that the activity orientation flat board 4 of driving PCB A and placement PCBA overcomes compression spring 22 moves down, test contact on PCBA contacts and applies certain contact pressure with corresponding probe, and the big I of the contact pressure that specifically applies is with reference to the dependence test standard.
Then, connect switch 19 and test, the process of concrete test is a prior art, does not repeat them here.
After test finished, cut-off switch 19 was manually gone up and is pressed monkey wrench 11, moves to initial position on the pressing plate 5, and PCBA and the activity orientation flat board 4 of placing PCBA are in the restoring force effect of compression spring 22 rejuvenate beginning position next time.
Then, take out PCBA by the finger position recess 17 that is opened on the activity orientation flat board 4.
In the present embodiment, by in the test board box, terminal connector being set, base plate is provided with the probe set pilot hole, on the activity orientation flat board probe aperture is set, probe is positioned in probe aperture and the probe set pilot hole, and by signal wire linking probe cover pilot hole bottom and terminal connector, all needs splicing ear connector and probe when having avoided each test, improved the efficient of test, reduced the influence of human factor test result.
By between activity orientation flat board and base plate, compression spring being set, and the step trough and the PCBA clearance fit of placing PCBA, the activity orientation flat board is moved along the vertical direction, the distance of regulating test contact and probe is convenient, avoided between test contact and probe, being connected lead, improved testing efficiency, and can guarantee test contact and probe locating accuracy on the PCBA can be applicable to the PCBA functional test of plurality of specifications.
Pressing plate 5 is in the process that moves down, leading countershaft by monkey wrench fixed head axle bed and slip leads, increased the stability that pressing plate moves down, the cylinder briquetting is steadily contacted with the PCBA surface, thereby make the contact pressure that is applied on the last test contact of PCBA even, avoid each test contact because of the different test result errors that cause of contact pressure, improved testing reliability.
By pressing down monkey wrench 11 application of forces, force application structure is simple, easy to adjust, and it is reliable to make probe and PCBA go up test contact clamping contact, and further, the utility model each several part structure is separate, and loading and unloading, replacing are conveniently.
By as seen above-mentioned, the instrument of a kind of testing printed circuit board assembling of the present utility model, the demand of the PCBA functional test of the vehicle-mounted digital television of producing in enormous quantities on the production line is satisfied in the PCBA functional test that have simple in structure, easy to adjust, accurate positioning, contact is reliable, mounting or dismounting are convenient, testing efficiency is high, can be applicable to plurality of specifications.
More than lift preferred embodiment; the purpose of this utility model, technical scheme and advantage are further described; institute is understood that; the above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all within spirit of the present utility model and principle; any modification of being done, be equal to replacement, improvement etc.; all should be included within the protection domain of the present utility model; the interest field that the utility model is advocated should be as the criterion so that the utility model application scope is described, but not only limits to the foregoing description.
Claims (10)
1, the instrument of a kind of testing printed circuit board assembling PCBA is characterized in that this instrument comprises: test board box, web joint, test fixture locating device and dull and stereotyped press fit device, wherein,
In the test board box terminal connector is set;
Web joint stands up in test board box one side;
Dull and stereotyped press fit device is positioned the web joint upper end, and dull and stereotyped press fit device bottom is provided with the pressing plate that has the cylinder briquetting, and dull and stereotyped press fit device is used to control the pressing plate that has the cylinder briquetting and moves up and down along web joint;
The test fixture locating device, be positioned in the middle of dull and stereotyped press fit device and the test board box, be positioned on the test board box, the bottom is fixed with the probe set that is connected by signal wire with terminal connector, when the downward application of force of dull and stereotyped press fit device, have the PCBA that the pressing plate control of cylinder briquetting is placed in the test fixture locating device and move down, the test contact on the PCBA is contacted with probe.
2, instrument as claimed in claim 1 is characterized in that, described test board box comprises: switch, general-purpose serial bus USB interface, serial ports terminal, S terminal, audio frequency terminal, DC terminal and antennal interface, wherein,
Switch is arranged on test board box right side, and startup or disconnection are to the test of PCBA;
Antennal interface is arranged on test board box left side, and radiofrequency signal transfers to PCBA by the antennal interface of offering and goes up corresponding antenna contacts;
USB interface, serial ports terminal, S terminal, audio frequency terminal and DC terminal are arranged on test board box rear side, form terminal connector, link to each other with the probe set that is fixed on test fixture locating device bottom by signal wire.
3, instrument as claimed in claim 1 is characterized in that, described test fixture locating device comprises the activity orientation flat board,
Offer the ladder locating slot of placing PCBA on the activity orientation flat board, offer the probe aperture of placing probe in ladder locating slot bottom, adjust screw retention on the test board box, compression spring is socketed on to be adjusted outside the screw, one end of compression spring contacts with the dull and stereotyped bottom of activity orientation, and the other end contacts with the test board box.
4, instrument as claimed in claim 3 is characterized in that, described test fixture locating device further comprises: base plate,
Base plate is positioned over test board box upper end, has the detent of placing the activity orientation flat board on the base plate, in the detent bottom, offers the probe set pilot hole of ccontaining probe, by sub-connector of signal wire connecting end and probe set bottom;
Also offer the adjustment screw hole of ccontaining adjustment screw on the base plate.
5, instrument as claimed in claim 4 is characterized in that, described ladder locating slot and PCBA and described detent and activity orientation flat board are clearance fit.
6, instrument as claimed in claim 3 is characterized in that, described activity orientation flat board, test board box, web joint are made of organic glass.
As claim 3 or 4 described instruments, it is characterized in that 7, described activity orientation flat board further offers the finger position recess that is used to take out PCBA.
As each described instrument of claim 1 to 6, it is characterized in that 8, described dull and stereotyped press fit device further comprises link iron plate, movable axis, connecting rod, monkey wrench fixed head and monkey wrench, wherein,
Link iron plate is fixed on the web joint, and the part of link iron plate extends to form monkey wrench fixed head axle bed along the place ahead, offer the through hole of the ccontaining movable axis of vertical perforation on the monkey wrench fixed head axle bed;
Movable axis bottom fixation clip, pressing plate bottom are fixed with and are used for when movable axis moves down, and contact and press down the cylinder briquetting of PCBA with PCBA upper surface in being placed on the activity orientation flat board;
The movable axis top offers groove, ccontaining connecting rod bottom in the groove, and by bearing pin and connecting rod bottom pin joint;
Connecting rod top and handle one end are placed in the groove that the monkey wrench fixed head offers, and the connecting rod top is by bearing pin and monkey wrench fixed head middle part pin joint, are placed in handle in the monkey wrench by bearing pin and monkey wrench fixed head top pin joint;
Monkey wrench fixed head bottom is placed in the groove that the monkey wrench fixed support offers, by bearing pin and the monkey wrench fixed support pin joint that is fixed on the web joint.
9, instrument as claimed in claim 8 is characterized in that, described dull and stereotyped press fit device further comprises chained block,
Chained block is fixed on the web joint, and chained block offers the chained block screw hole, and link offers screw hole on the iron plate, is placed in that the interior screw of screw hole and chained block screw hole will link iron plate and chained block is spirally connected fixing.
10, instrument as claimed in claim 9 is characterized in that, described dull and stereotyped press fit device further comprises sliding leads countershaft and axle bed,
Offer the through hole of vertical perforation on pressing plate, and boring is led countershaft with ccontaining slip on base plate, lead the part that countershaft stretches out the pressing plate upper end in slip, socket is used for the axle bed of stop bit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820134852XU CN201269888Y (en) | 2008-09-22 | 2008-09-22 | Tool for printed circuit board assembling test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820134852XU CN201269888Y (en) | 2008-09-22 | 2008-09-22 | Tool for printed circuit board assembling test |
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| CN201269888Y true CN201269888Y (en) | 2009-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU200820134852XU Expired - Fee Related CN201269888Y (en) | 2008-09-22 | 2008-09-22 | Tool for printed circuit board assembling test |
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-
2008
- 2008-09-22 CN CNU200820134852XU patent/CN201269888Y/en not_active Expired - Fee Related
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