A kind of needle-bar frock for detection of circuit board
Technical field
The utility model relates to the detection field of circuit board, in particular to a kind of needle-bar frock for circuit board detecting.
Background technology
Circuit board can not be installed to every circuit board on complete machine and test when producing in enormous quantities.Therefore in actual production, technique department can manufacture and design a kind of test fixture and simulate complete machine.The design concept of test fixture is to be connected with circuit board with a test needle-bar simulation complete machine.Power supply on electroplax, ground wire, input line and output line are received on the flexibility test pin of needle-bar on frock, then with input signal and power supply on some switches control frocks, exported with the corresponding output load on pilot lamp, hummer or motor simulation complete machine.When being pressed onto tested circuit board on test fixture, the input end on frock, output terminal, power end and terminate on circuit board, circuit board just can work.Pull the switch on frock or start test procedure, circuit board can be controlled the corresponding signal of fuction output to the output load on frock by it.Whether the tester just can normal according to the signal judging circuit plate work of output.But existing test fixture is not high to the bearing accuracy of circuit board, detachability is poor.
For example Granted publication number discloses the split type test fixture of a kind of air conditioner electric control plate for the patent of CN 200956047 Y, comprise press, test probe, positioning fixture, test needle-bar, functional test circuit and display, described positioning fixture is the air-conditioning location-plate, and test probe, air conditioner electric control plate reference column are arranged on same board-like or frame-type test needle-bar; The functional test circuit is arranged in the universal display box, and display is arranged on the panel of universal display box, and the test needle-bar is fixed on the base plate of press, and test needle-bar and the split of universal test display box arrange, and connect by stube cable.But this frock needs no test needle-bar for different electric-controlled plates, and testing cost is higher.
Granted publication number discloses a kind of pick-up unit for printed-wiring board (PWB) for the patent of CN 201382963 Y, include thimble, patrix printed panel compression leg, counterdie upper cover plate and counterdie panel, also include printing back up pad and thimble back up pad, the upper end face of printing back up pad is cambered surface, the upper end face of bottom surface and thimble back up pad is mating surface, arc-shaped PCB is positioned at below patrix printed panel compression leg, located by the needle-bar patrix, and be placed on the upper cambered surface of printed panel back up pad, the printed panel back up pad is connected across on the counterdie upper cover plate, the thimble back up pad is parallel with the printed panel back up pad, be connected across on the counterdie panel.But this device can only detect for the printed-wiring board (PWB) of arc, and the profile of wiring board is limited to some extent, and the product versatility is not strong.
The utility model content
In order to solve the above-mentioned technological deficiency that exists in prior art, the utility model provides a kind of needle-bar frock for detection of circuit board, this frock is carried out the detection of electric property to circuit board in conjunction with checkout equipment, whether bad welded condition (as bad phenomenon such as Short Item, wrong parts) and the circuit board line of concrete detecting element have short circuit, it is bad to open circuit, and explicitly point out bad position, greatly promoted defective products overhaul efficiency and product quality.
To achieve these goals, the technical solution of the utility model is:
A kind of needle-bar frock for detection of circuit board, comprise press plate, day plate, needle plate, support plate, probe and pedestal, it plate is arranged on the bottom of press plate, when the assembly of described sky plate and needle plate is descending, needle plate is depressed into support plate, the test point that probe on needle plate and pedestal touches circuit board detects, and detects complete day after tomorrow of plate and the assembly automatic homing of needle plate.
The course of work of this needle-bar frock is: at first the needle-bar frock is arranged on checkout equipment, next switch on power by needle-bar frock connecting groove, then access the program name that to produce, circuit board is placed in the Baltimore groove of support plate center, (planform according to circuit board is placed, and in pilot hole in positioning holes on circuit board insertion Baltimore groove, circuit board can not occur being uneven or the phenomenon of perk in put procedure), then both hands are pressed start key and are detected.At first at first needle plate presses down, and when being depressed into the support plate position, when namely probe touched circuit board test point, the program automatically generated data showed test results, test result out after, the needle plate automatic homing prepare to detect next circuit board.
Preferably, be provided with upper supporting column, connecting groove between described sky plate and needle plate.Because this frock is the electric control frock, be used for switching on power so be provided with connecting groove on needle plate.
Preferably, described needle plate bottom is provided with reference column, probe and vertical columns in above-mentioned arbitrary scheme.Reference column is positioned at the surrounding of needle plate, and when its plate was descending with the assembly of needle plate, pilot hole corresponding on reference column and support plate coordinated, and then has guaranteed that the assembly of sky plate and needle plate is vertically descending; When needle plate was depressed into the support plate position, vertical columns was by on the surface that is pressed in circuit board, and then the assurance circuit board does not depart from or perk in Baltimore groove.
Preferably, described vertical columns is perpendicular to the bottom surface of needle plate in above-mentioned arbitrary scheme.
Preferably, the center of described support plate is provided with Baltimore groove in above-mentioned arbitrary scheme.
Preferably, described Baltimore groove is used for placing circuit board in above-mentioned arbitrary scheme, and its shape approximation is in the shape of circuit board.The physical dimension of Baltimore groove is greater than the physical dimension of circuit board, and the circuit board that can conveniently detect after completing like this takes out in Baltimore groove.
Preferably, the bottom of described Baltimore groove is surface level in above-mentioned arbitrary scheme, and its edge is provided with U-lag.Circuit board after detection is completed is difficult to therefrom take out owing to being placed in Baltimore groove, therefore be provided with one or more U-lags at the edge of Baltimore groove, the staff can take out circuit board at the U-lag place.
Preferably, the bottom of described Baltimore groove has probe aperture in above-mentioned arbitrary scheme.
Preferably, described pedestal is provided with fixedly expansion link and connecting groove in above-mentioned arbitrary scheme.
Preferably, the upper plane of described pedestal is provided with pilot hole in above-mentioned arbitrary scheme, and this pilot hole is through support plate, and the reference column bottom needle plate is connected.
Preferably, described pedestal is the housing of hollow in above-mentioned arbitrary scheme, its bottom four jiaos have square groove.
Preferably, described expansion link is provided with spring in above-mentioned arbitrary scheme.
Preferably, described probe is vertically implanted on the upper surface plate of pedestal in above-mentioned arbitrary scheme.
Preferably, described needle plate and support plate all adopt organic glass or bakelite to make in above-mentioned arbitrary scheme.Because characteristics such as organic glass and bakelite all have insulation, do not produce static, wear-resisting and high temperature resistant, this frock adopts the mode of electric control, requires needle plate and support plate to have insulation, does not produce static, so needle plate and support plate employing organic glass or bakelite making.
Description of drawings
Fig. 1 is the structural representation according to a preferred embodiment of the needle-bar frock for detection of circuit board of the present utility model;
Fig. 2 is the front view according to needle-bar frock one preferred embodiment for detection of circuit board of the present utility model shown in Fig. 1;
Fig. 3 is the structural representation according to a preferred embodiment that separates for detection of needle plate in the needle-bar frock of circuit board and support plate of the present utility model shown in Fig. 1;
Fig. 4 be shown in Fig. 1 according to the structural representation for detection of a preferred embodiment of pedestal in the needle-bar frock of circuit board of the present utility model;
Fig. 5 be shown in Fig. 1 according to the structural representation for detection of a preferred embodiment of support plate in the needle-bar frock of circuit board of the present utility model;
Fig. 6 is the structural representation according to the preferred embodiment for detection of support plate bottom in the needle-bar frock of circuit board of the present utility model shown in Fig. 1.
Attached number in the figure:
It plate 10, upper supporting column 11, needle plate 20, reference column 21, vertical columns 22, support plate 30, Baltimore groove 31, pilot hole 32, fixedly expansion link 40, spring 41, probe 50, pedestal 60, connecting groove 61, square groove 62, circuit board 70.
Embodiment
Be further described below in conjunction with the embodiment of Figure of description to the needle-bar frock for detection of circuit board of the present utility model.
As shown in Figure 1-Figure 3, according to the needle-bar frock for detection of circuit board of the present utility model, comprise press plate (not shown), day plate 10, needle plate 20, support plate 30, probe 50 and pedestal 60, it plate 10 is arranged on the bottom of press plate (not shown), when it plate 10 is descending with the assembly of needle plate 20, needle plate 20 is depressed into support plate 30, and the test point that the probe 50 on pedestal 60 touches circuit board 70 detects, and detects complete day after tomorrow of plate and the assembly automatic homing of needle plate.
The course of work of this needle-bar frock is: at first access the program name that will produce, then circuit board 70 is placed on that in the Baltimore groove 31 of support plate 30 centers, (planform according to circuit board 70 is placed, circuit board 70 can not occur being uneven or the phenomenon of perk), next switch on power by connecting groove 61, after power connection, both hands are pressed start key and are detected.At first press down at the rear faller 20 that switches on power, and then drive vertical columns 22 presses down thereupon.Press circuit board 70 at vertical columns 22, this moment is compressed the shortening of spring 41 on expansion link 40 fixedly, when the test point on circuit board 70 contacts with the end of probe 50, it plate 10 stops downward operation with the assembly of needle plate 20, and then stoped pressing of 22 pairs of circuit boards 70 of vertical columns, the program automatically generated data shows test results.After detection was completed, day plate 10 was up with the assembly drive vertical columns 22 of needle plate 20, and then leaves circuit board 70, and this moment, support plate 30 recovered original position under the effect of spring 41, took out circuit board 70, prepared next circuit board of detection.
This frock is carried out the detection of electric property in conjunction with checkout equipment to circuit board 70, whether bad welded condition (as bad phenomenon such as Short Item, wrong parts) and the circuit board line of concrete detecting element have short circuit, it is bad to open circuit, and explicitly point out bad position, greatly promoted defective products overhaul efficiency and product quality.Be provided with upper supporting column 11, connecting groove 61 between it plate 10 and needle plate 20.Because this frock is the electric control frock, be used for switching on power so be provided with connecting groove 61 on needle plate 20.
Needle plate 20 bottoms are provided with reference column 21 and vertical columns 22.Reference column 21 is positioned at the surrounding of needle plate 20, and when day plate 10 was descending with the assembly of needle plate 20, pilot hole corresponding on reference column 21 and support plate 20 coordinated, and then has guaranteed that the assembly of sky plate 10 and needle plate 20 is vertically descending; When needle plate 20 was depressed into support plate 30 position, vertical columns 22 was by on the surface that is pressed in circuit board 70, and then assurance circuit board 70 does not depart from or perk in Baltimore groove 31.
Be not uneven in groove 31 or the phenomenon of perk in order to guarantee that circuit board 70 is placed on, use 22 pairs of circuit boards 70 of vertical columns to press, therefore vertical with circuit board 70 when only having vertical columns 22 can guarantee just that perpendicular to the bottom surface of needle plate 20 vertical columns 22 goes downwards to circuit board 70 surperficial, can not be uneven or the phenomenon of perk.
Expansion link 40 is provided with spring 41.On the upper surface plate of the vertical implantation pedestal 60 of probe 50.In order to prevent that probe 50 from wearing and tearing with probe aperture 33 Long Term Contacts, again because probe aperture 33 is attached to the bottom of support plate 30 middle concave grooves 31, so probe 50 leaves certain distance with the bottom of Baltimore groove 31, relies on spring 41 that support plate 30 is held up at this.When the same day, plate 10 was descending with the assembly of needle plate 20, at first needle plate 20 pressed down, and then drive vertical columns 22 presses down thereupon.Press circuit board 70 at vertical columns 22, this moment is compressed the shortening of spring 41 on expansion link 40 fixedly, when the test point on circuit board 70 contacted with the end of probe 50, day plate 10 stopped downward operation with the assembly of needle plate 20, and then has stoped pressing of 22 pairs of circuit boards 70 of vertical columns.After detection was completed, day plate 10 was up with the assembly drive vertical columns 22 of needle plate 20, and then leaves circuit board 70, and this moment, support plate 30 recovered original position under the effect of spring 41.
Needle plate 20 all adopts organic glass or bakelite to make with support plate 30.Because organic glass and bakelite all have insulation, do not produce static, the characteristic such as wear-resisting and high temperature resistant, this frock adopts the mode of electric control, require needle plate 20 and support plate 30 to have insulation, do not produce static, so needle plate 20 adopts organic glass or bakelite to make with support plate 30.
As shown in Figure 4, pedestal 60 is provided with fixedly expansion link 40 and connecting groove 61.
The upper plane of pedestal 60 is provided with pilot hole 32, and this pilot hole 32 is through support plate 30, and matches with the reference column 21 of needle plate 20 bottoms.For convenient in carrying is laborsaving, pedestal 60 is processed into the housing of hollow, and four jiaos of its bottoms have square groove 62, and the plane of pedestal 60 bottoms is surface level in addition, just the parts of doing like this assurance top vertically downward.
As shown in Fig. 5-6, the center of support plate 30 is provided with Baltimore groove 31.Baltimore groove 31 is used for placing circuit board 70, and its shape approximation is in the shape of circuit board 70.The physical dimension of Baltimore groove 31 is greater than the physical dimension of circuit board 70, can conveniently detect like this circuit board 70 after completing from the interior taking-up of Baltimore groove 31.
The bottom of Baltimore groove 31 is surface level, and its edge is provided with U-lag 34.Circuit board 70 after detection is completed is difficult to therefrom take out owing to being placed in Baltimore groove 31, therefore be provided with one or more U-lags 34 at the edge of Baltimore groove 31, the staff can take out circuit board 70 at U-lag 34 places.
The bottom of Baltimore groove 31 has probe aperture 33.The arrangement of its probe aperture 33 is arranged respectively according to test point on circuit board 70.When the same day, plate 10 was descending with the assembly of needle plate 20, at first needle plate 20 pressed down, and then drive vertical columns 22 presses down thereupon.Press circuit board 70 at vertical columns 22, this moment is compressed the shortening of spring 41 on expansion link 40 fixedly, passes probe aperture 33 when contacting with the end of probe 50 when the test point on circuit board 70, and the assembly of sky plate 10 and needle plate 20 stops downward operation.
It will be apparent to those skilled in the art that the combination in any that comprises each several part in this instructions for detection of the needle-bar frock of circuit board of the present utility model.As space is limited and in order to be to make instructions simple and clear, these combinations not to be introduced one by one in detail at this, but after having seen this instructions, the scope of the present utility model that the combination in any of the each several part that is made of this instructions consists of is self-evident.