CN108427019B - A tool for circuit board fault detection - Google Patents
A tool for circuit board fault detection Download PDFInfo
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- CN108427019B CN108427019B CN201810194204.1A CN201810194204A CN108427019B CN 108427019 B CN108427019 B CN 108427019B CN 201810194204 A CN201810194204 A CN 201810194204A CN 108427019 B CN108427019 B CN 108427019B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0425—Test clips, e.g. for IC's
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2832—Specific tests of electronic circuits not provided for elsewhere
- G01R31/2836—Fault-finding or characterising
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Abstract
The invention discloses a jig for detecting faults of a circuit board, which comprises a jig body, auxiliary detection equipment and an alligator clip, wherein the jig body is provided with a first detection device and a second detection device; the jig body comprises a first sliding groove, a first metal rod, a second sliding groove and a second metal rod, wherein two ends of the first metal rod are fixed on the first sliding groove, two ends of the second metal rod are fixed on the second sliding groove, two ends of the first metal rod are respectively provided with a first connecting terminal and a second connecting terminal, two ends of the second metal rod are respectively provided with a third connecting terminal and a fourth connecting terminal, and the first metal rod and the second metal rod are both provided with self-locking spring needles which are in contact with a test hole of a circuit board; the circuit board fixing device further comprises a board slot for the circuit board to enter and exit, and a buckle for fixing the circuit board is arranged on a notch of the board slot; the auxiliary detection equipment comprises a positioning light source and an industrial magnifier; one end of the crocodile clip is electrically connected with the connecting terminal, and the other end of the crocodile clip is electrically connected with the connecting terminal of the multimeter. The jig disclosed by the invention is simple in structure, convenient to operate, accurate in positioning of the test holes, capable of automatically feeding plates, labor-saving and high in efficiency.
Description
Technical Field
The invention relates to the technical field of circuit fault detection equipment, in particular to a jig for detecting circuit board faults.
Background
The integration level of electronic circuits is higher and higher, chip pins and miniature electronic components are also more and more dense, and after the existing circuit board breaks down, manual troubleshooting is needed, and the faults are maintained. The existing failure solving steps are as follows: and checking the devices on the whole circuit board one by one, finding out short circuit pins or short circuit devices, and re-welding the short circuit pins or the short circuit devices. The defect is that the efficiency is low, the gauge needle of the multimeter is thick and cannot be aligned to a test hole on a circuit board or a pin of a component, and a single person cannot fix a circuit board test point and the gauge needle of the multimeter, so that manual troubleshooting is complicated.
Chinese patent No. CN103760388A discloses a four-wire test fixture and a test method thereof, the fixture includes an upper fixture and a lower fixture, the upper fixture and the lower fixture are respectively clamped at two sides of a PCB board, four pads to be tested on the PCB board respectively correspond to four test needles on the upper fixture and the lower fixture one to one, the four test needles are respectively connected to a fixture ox horn, the fixture ox horn is connected to a four-wire tester for testing, by using a four-wire test principle, a two-wire fixture structure is adopted, the four-wire tester is collocated, and a function of the four-wire test is realized.
Although the four-wire test fixture can detect the line conduction condition and is low in cost, the four-wire test fixture is not strong in practicability and has the following problems:
the four-wire test fixture needs to be provided with equipment such as a power supply, a voltmeter, an ammeter and the like, four bonding pads need to be selected, four corresponding test needles are arranged corresponding to the four bonding pads, the four-wire test fixture is complex in operation and structure, and the power supply for testing is prone to causing secondary damage to a circuit board;
secondly, four testing needles of the four-wire testing jig need to be manually aligned and inserted into corresponding four bonding pads, the testing needles are difficult to be accurately inserted into the bonding pads, the testing needles cannot be fixed on the bonding pads by a single person, the testing needles lack a positioning mechanism, and the testing efficiency is low;
the four-wire test fixture cannot accurately position the test holes of the circuit board at night, and is difficult to operate at night due to the lack of a positioning light source and an industrial magnifier;
when the four-wire test fixture is used for troubleshooting of the circuit board, the circuit board is poor in stability, a circuit board fixing mechanism is lacked, and a board slot which is beneficial to the circuit board to enter and exit is not formed, so that the test effect of the circuit board is influenced;
fifthly, the four-wire test fixture is provided with four test needles, one test needle cannot be used, so that circuit board faults cannot be checked directly, and a spare test needle is lacked.
In order to overcome the defects, the technical personnel in the field actively innovate and research to create a jig for detecting the circuit board faults.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a jig for detecting the faults of a circuit board, after the jig is used, the circuit board is reliably fixed, an external power supply is not required for testing, the secondary damage of the circuit board is avoided, a testing needle positioning mechanism is added, a testing needle is accurately inserted into a testing hole, the two hands of a tester are released, and meanwhile, a positioning light source and an industrial magnifier are arranged, so that the night troubleshooting effect is improved.
In order to solve the technical problems, the invention adopts a technical scheme that:
the jig for detecting the circuit board faults comprises a jig body, auxiliary detection equipment and an alligator clip, wherein the auxiliary detection equipment and the alligator clip are fixed on the side wall of the jig body;
the jig body comprises a first sliding groove, a first metal rod, a second sliding groove and a second metal rod, wherein two ends of the first metal rod are fixed on the first sliding groove, two ends of the second metal rod are fixed on the second sliding groove, the first metal rod is in sliding connection with the first sliding groove, the second metal rod is in sliding connection with the second sliding groove, the first sliding groove is positioned above the second sliding groove, two ends of the first metal rod are respectively provided with a first connecting terminal and a second connecting terminal, two ends of the second metal rod are respectively provided with a third connecting terminal and a fourth connecting terminal, the first connecting terminal and the second connecting terminal are respectively in threaded connection with two ends of the first metal rod, the third connecting terminal and the fourth connecting terminal are respectively in threaded connection with the second metal rod, and the first metal rod and the second metal rod are both provided with a plurality of self-locking spring needles which are in contact with a test hole of a circuit board, the needle cap of each self-locking spring needle is positioned at the upper ends of the first metal rod and the second metal rod, and the needle body of each self-locking spring needle is positioned at the lower ends of the first metal rod and the second metal rod;
the fixture body is also provided with a plate groove for the circuit board to pass in and out, two sides of the plate groove are respectively provided with a fixing plate for fixing the circuit board, two ends of each fixing plate are provided with a through hole, the inner wall of each through hole is carved with a thread, and the through holes are in threaded connection with fixing screws;
the auxiliary detection equipment comprises a positioning light source and an industrial magnifier, the jig body is provided with an electric pan-tilt, the upper end of the electric pan-tilt is provided with an inverted L-shaped fixed rod, the positioning light source is vertically suspended on a transverse rod of the inverted L-shaped fixed rod, the industrial magnifier is fixed at the end part of the transverse rod, and the electric pan-tilt is electrically connected with a lithium battery;
the crocodile clip comprises a first main crocodile clip, a first auxiliary crocodile clip, a second main crocodile clip and a second auxiliary crocodile clip, the first main crocodile clip is electrically connected with the first connecting terminal, the first auxiliary crocodile clip is electrically connected with the second connecting terminal, the second main crocodile clip is electrically connected with the third connecting terminal, and the second auxiliary crocodile clip is electrically connected with the fourth connecting terminal.
Further, the test connection mode of the fixture is one of four types:
the first method comprises the following steps: the first main alligator clip is electrically connected with one connecting terminal of the multimeter, and the second auxiliary alligator clip is electrically connected with the other connecting terminal of the multimeter;
and the second method comprises the following steps: the first main alligator clip is electrically connected with one connecting terminal of the multimeter, and the second main alligator clip is electrically connected with the other connecting terminal of the multimeter;
and the third is that: the second auxiliary alligator clip is electrically connected with one connecting terminal of the multimeter, and the first auxiliary alligator clip is electrically connected with the other connecting terminal of the multimeter;
and fourthly: the second main alligator clip is electrically connected with a connecting terminal of the multimeter, and the first auxiliary alligator clip is electrically connected with another connecting terminal of the multimeter.
Further say, the tool includes a plurality of pulleys, the notch in board groove is equipped with and does benefit to the circuit board is gliding the pulley, the skid resistant course has been laid to the global of pulley, the pulley is rotatory by the driving motor drive, driving motor with the lithium cell electricity is connected, the radius of pulley with the thickness sum of circuit board is less than the height of notch, the height H of notch is 0.8cm, the radius R of pulley is 0.2 cm.
Further, both ends of the first metal rod and both ends of the second metal rod are provided with rolling grooves, the diameters of the rolling grooves are smaller than the diameters of the first metal rod and the second metal rod, the outer diameter of each connecting terminal is not smaller than the widths of the first sliding groove and the second sliding groove, the inner diameter of each connecting terminal is equal to the diameter of the rolling groove, the width W1 of the first sliding groove is 1.2cm, the width W2 of the second sliding groove is 1.2cm, the diameter D1 of the rolling groove is 1.1cm, the inner diameter D2 of each connecting terminal is 1.1cm, the outer diameter D3 of each connecting terminal is 1.3cm, the diameter D4 of the first metal rod is 1.3cm, and the diameter D5 of the second metal rod is 1.3 cm.
Furthermore, the left end and the right end of the notch of the plate groove are respectively provided with a buckle for fixing the circuit board, and the buckles are connected with the plate groove through hinges.
Furthermore, one of nitrile rubber, silicon rubber and fluororubber is laid at the bottom of the fixing screw.
Further, the L-shaped fixing rod comprises a longitudinal rod and a transverse rod, the longitudinal rod is fixedly connected with the transverse rod through a bent pipe, the longitudinal rod is provided with a first switch which longitudinally stretches out and draws back, the transverse rod is provided with a second switch which transversely stretches out and draws back, and the transverse rod is hinged to the end of the industrial magnifier.
Further, the jig body is provided with an arched handle capable of lifting the jig body, and two ends of the arched handle are respectively fixed to the left side surface and the right side surface of the jig body.
Furthermore, the positioning light source is one of a high-pressure sodium lamp, a metal halide lamp, an energy-saving lamp, a fluorescent lamp and an LED lamp, and the positioning light source is powered by the lithium battery.
Furthermore, the self-locking spring needle is in contact connection with the first metal rod and the second metal rod, and the first metal rod is not in contact with the second metal rod.
The jig further comprises a control panel, the control panel is provided with a holder button for driving the electric holder to rotate, a driving switch for driving the driving motor to rotate and a lighting button for driving the positioning light source to be switched on and off, and the control panel is electrically connected with the lithium battery.
The invention has the beneficial effects that:
in the process of carrying out fault detection and troubleshooting on the circuit board, the tool can realize fault troubleshooting only by using a universal meter and a plurality of leads, only two bonding pads and corresponding testing holes are needed to be selected, a testing power supply is not needed to be added, secondary damage of the circuit board is avoided, the operation is simple, and the structure is simplified;
the jig body comprises a first sliding groove, a first metal rod, a second sliding groove and a second metal rod, wherein two ends of the first metal rod are fixed on the first sliding groove, two ends of the second metal rod are fixed on the second sliding groove, the first metal rod is connected with the first sliding groove in a sliding mode, the second metal rod is connected with the second sliding groove in a sliding mode, the first sliding groove is located above the second sliding groove, two ends of the first metal rod are respectively provided with a first connecting terminal and a second connecting terminal, two ends of the second metal rod are respectively provided with a third connecting terminal and a fourth connecting terminal, the first connecting terminal and the second connecting terminal are respectively in threaded connection with two ends of the first metal rod, the third connecting terminal and the fourth connecting terminal are respectively in threaded connection with the second metal rod, the first metal rod and the second metal rod are both provided with a plurality of self-locking spring needles which are in contact with a test hole of a circuit board, the needle cap of each self-locking spring needle is positioned at the upper ends of the first metal rod and the second metal rod, the needle body of each self-locking spring needle is positioned at the lower ends of the first metal rod and the second metal rod, the positions of the first metal rod and the second metal rod are adjusted to be right above the test hole, the self-locking spring needle is pressed down, the needle body of the self-locking spring needle is reliably contacted with the test hole, meanwhile, the self-locking spring needle is self-locked, accurate positioning of the test hole is realized, the two hands of a detector are released, manpower is saved, and the fault detection efficiency is improved;
the jig is provided with auxiliary detection equipment, and comprises a positioning light source and an industrial magnifier, wherein an electric pan tilt is arranged on a jig body, an inverted L-shaped fixing rod is arranged at the upper end of the electric pan tilt, the inverted L-shaped fixing rod comprises a longitudinal rod and a transverse rod, the positioning light source is vertically suspended on the transverse rod of the inverted L-shaped fixing rod, the industrial magnifier is fixed at the end part of the transverse rod, the electric pan tilt is electrically connected with a lithium battery, the longitudinal rod is fixedly connected with the transverse rod through a bent pipe, the longitudinal rod is provided with a longitudinally telescopic first switch, the transverse rod is provided with a transversely telescopic second switch, the transverse rod is hinged with the end part of the industrial magnifier, the positioning light source is irradiated without dead angles, the industrial magnifier is free and flexible, a circuit board test hole is conveniently positioned, and the night circuit;
the jig body is provided with plate grooves for the circuit board to pass in and out, two fixing plates for fixing the circuit board are respectively arranged on two sides of each plate groove, a through hole is arranged at each of two ends of each fixing plate, threads are carved on the inner wall of each through hole, each through hole is in threaded connection with a fixing screw, a pulley which is beneficial to the circuit board to slide is arranged on a notch of each plate groove, an anti-skidding layer is laid on the peripheral surface of each pulley, each pulley is driven to rotate by a driving motor, each driving motor is electrically connected with a lithium battery, the sum of the radius of each pulley and the thickness of the, the height H of notch is 0.8cm, the radius R of pulley is 0.2cm, and both ends are equipped with the buckle that is used for fixed circuit board respectively about the notch of board groove, buckle and board groove hinged joint, and the reinforcing circuit board steadiness alleviates circuit board friction damage, advances the board automatically, and release personnel both hands improve fault detection efficiency.
Fifthly, the test connection mode of the jig is one of the following four modes:
the first method comprises the following steps: the first main alligator clip is electrically connected with one connecting terminal of the multimeter, and the second auxiliary alligator clip is electrically connected with the other connecting terminal of the multimeter;
and the second method comprises the following steps: the first main alligator clip is electrically connected with one wiring terminal of the multimeter, and the second main alligator clip is electrically connected with the other wiring terminal of the multimeter;
and the third is that: the second auxiliary alligator clip is electrically connected with one connecting terminal of the multimeter, and the first auxiliary alligator clip is electrically connected with the other connecting terminal of the multimeter;
and fourthly: the second main alligator clip is electrically connected with one connecting terminal of the multimeter, and the first auxiliary alligator clip is electrically connected with the other connecting terminal of the multimeter;
the test connection mode is diversified, and the test stability of the jig is improved.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a front view of the fixture of the present invention;
FIG. 3 is a left side view of the therapeutic device of the present invention;
FIG. 4 is a control schematic of the present invention;
the parts in the drawings are marked as follows:
the automatic detection device comprises a treatment body 1, a first sliding groove 2, a first metal rod 3, a second sliding groove 4, a second metal rod 5, a first connecting terminal 6, a circuit board 7, a test hole 7-1, a self-locking spring needle 8, a needle cap 8-1 of the self-locking spring needle, a needle body 8-2 of the self-locking spring needle, a plate groove 9, a notch 9-1 of the plate groove, a buckle 9-2, a fixing plate 10, a through hole 10-1, a fixing screw 11, a positioning light source 12, an industrial magnifier 13, an electric tripod head 14, an inverted L-shaped fixing rod 15, a transverse rod 15-1, a longitudinal rod 15-2, a bent pipe 15-3, a first switch 15-4, a second switch 15-5, a lithium battery 16, a first main crocodile clamp 17, a first auxiliary crocodile clamp 18, a second main crocodile clamp 19, a second auxiliary crocodile clamp 20, a universal meter 21, a pulley 22, a driving motor 23, a first connecting, The rolling groove 24, the arc-shaped handle 25, the control panel 26, the tripod head button 26-1, the driving switch 26-2, the lighting button 26-3, the second connecting terminal 27, the third connecting terminal 28, the fourth connecting terminal 29, the height H of the notch, the radius R of the pulley, the width W1 of the first sliding groove, the width W2 of the second sliding groove, the diameter D1 of the rolling groove, the inner diameter D2 of the connecting terminal, the outer diameter D3 of the connecting terminal, the diameter D4 of the first metal rod and the diameter D5 of the second metal rod.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and the present invention will be described in detail with reference to the accompanying drawings. The invention may be embodied in other different forms, i.e. it is capable of various modifications and changes without departing from the scope of the invention as disclosed.
Example (b): a jig for detecting circuit board faults is shown in figures 1 to 4 and comprises a jig body 1, auxiliary detection equipment and an alligator clip, wherein the auxiliary detection equipment is fixed on the side wall of the jig body;
the jig body comprises a first sliding groove 2, a first metal rod 3, a second sliding groove 4 and a second metal rod 5, wherein two ends of the first metal rod are fixed on the first sliding groove, two ends of the first metal rod are fixed on the second sliding groove, the first metal rod is in sliding connection with the first sliding groove, the second metal rod is in sliding connection with the second sliding groove, the first sliding groove is located above the second sliding groove, two ends of the first metal rod are respectively provided with a first connecting terminal 6 and a second connecting terminal 27, two ends of the second metal rod are respectively provided with a third connecting terminal 28 and a fourth connecting terminal 29, the first connecting terminal and the second connecting terminal are respectively in threaded connection with two ends of the first metal rod, the third connecting terminal and the fourth connecting terminal are respectively in threaded connection with the second metal rod, and the first metal rod and the second metal rod are respectively provided with a plurality of self-locking spring springs in contact with a testing hole 7-1 of a circuit board 7 The needle 8, the needle cap 8-1 of each self-locking spring needle is positioned at the upper ends of the first metal rod and the second metal rod, and the needle body 8-2 of each self-locking spring needle is positioned at the lower ends of the first metal rod and the second metal rod;
the fixture body is further provided with a plate groove 9 for the circuit board to enter and exit, two sides of the plate groove are respectively provided with a fixing plate 10 for fixing the circuit board, two ends of each fixing plate are provided with a through hole 10-1, the inner wall of each through hole is provided with a thread, and the through holes are in threaded connection with fixing screws 11;
the auxiliary detection equipment comprises a positioning light source 12 and an industrial magnifier 13, the jig body is provided with an electric pan-tilt 14, the upper end of the electric pan-tilt is provided with an inverted L-shaped fixed rod 15, the positioning light source is vertically suspended on a transverse rod 15-1 of the inverted L-shaped fixed rod, the industrial magnifier is fixed at the end part of the transverse rod, and the electric pan-tilt is electrically connected with a lithium battery 16;
crocodile clip includes that first owner crocodile clip 17, first supplementary crocodile clip 18, the crocodile clip 19 is owner to the second and the crocodile clip 20 is assisted to the second, first owner crocodile clip with first binding post electricity is connected, first supplementary crocodile clip with second binding post electricity is connected, second owner crocodile clip with third binding post electricity is connected, the second is assisted the crocodile clip with fourth binding post electricity is connected.
The test connection mode of the jig is one of four types:
the first method comprises the following steps: the first main alligator clip is electrically connected with one connecting terminal of a multimeter 21, and the second auxiliary alligator clip is electrically connected with the other connecting terminal of the multimeter;
and the second method comprises the following steps: the first main alligator clip is electrically connected with one connecting terminal of the multimeter, and the second main alligator clip is electrically connected with the other connecting terminal of the multimeter;
and the third is that: the second auxiliary alligator clip is electrically connected with one connecting terminal of the multimeter, and the first auxiliary alligator clip is electrically connected with the other connecting terminal of the multimeter;
and fourthly: the second main alligator clip is electrically connected with a connecting terminal of the multimeter, and the first auxiliary alligator clip is electrically connected with another connecting terminal of the multimeter.
The jig comprises a plurality of pulleys 22, the notch 9-1 of the plate groove is provided with a pulley beneficial to the circuit board to slide, an anti-skid layer is paved on the peripheral surface of the pulley, the pulley is driven to rotate by a driving motor 23, the driving motor is electrically connected with the lithium battery, the radius of the pulley and the sum of the thickness of the circuit board are smaller than the height of the notch, the height H of the notch is 0.8cm, and the radius R of the pulley is 0.2 cm.
The both ends of first metal rod with the both ends of second metal rod all are equipped with roll groove 24, the diameter of roll groove is less than first metal rod the diameter of second metal rod, each the external diameter of connecting terminal is not less than first sliding tray the width of second sliding tray, each the internal diameter of connecting terminal equals the diameter of roll groove, the width W1 of first sliding tray is 1.2cm, the width W2 of second sliding tray is 1.2cm, the diameter D1 of roll groove is 1.1cm, each the internal diameter D2 of connecting terminal is 1.1cm, each the external diameter D3 of connecting terminal is 1.3cm, the diameter D4 of first metal rod is 1.3cm, the diameter D5 of second metal rod is 1.3 cm.
The left end and the right end of the notch of the plate groove are respectively provided with a buckle 9-2 used for fixing the circuit board, and the buckles are connected with the plate groove through hinges.
One of nitrile rubber, silicon rubber and fluororubber is laid at the bottom of the fixing screw.
The inverted L-shaped fixing rod comprises a longitudinal rod 15-2 and a transverse rod, the longitudinal rod is fixedly connected with the transverse rod through an elbow 15-3, the longitudinal rod is provided with a first switch 15-4 which is longitudinally telescopic, the transverse rod is provided with a second switch 15-5 which is transversely telescopic, and the transverse rod is hinged with the end of the industrial magnifier.
The jig body is provided with an arched handle 25 capable of lifting the jig body, and two ends of the arched handle are respectively fixed on the left side surface and the right side surface of the jig body.
The positioning light source is one of a high-pressure sodium lamp, a metal halide lamp, an energy-saving lamp, a fluorescent lamp and an LED lamp, and is powered by the lithium battery.
The self-locking spring needle is in contact connection with the first metal rod and the second metal rod, and the first metal rod is not in contact with the second metal rod.
The jig further comprises a control panel 26, the control panel is provided with a cradle head button 26-1 for driving the electric cradle head to rotate, a driving switch 26-2 for driving the driving motor to rotate and an illumination button 26-3 for driving the positioning light source to be switched on and off, and the control panel is electrically connected with the lithium battery.
The working process and working principle of the invention are as follows:
the jig body comprises a first sliding groove, a first metal rod, a second sliding groove and a second metal rod, wherein two ends of the first metal rod are fixed on the first sliding groove, two ends of the second metal rod are fixed on the second sliding groove, the first metal rod is connected with the first sliding groove in a sliding mode, the second metal rod is connected with the second sliding groove in a sliding mode, the first sliding groove is located above the second sliding groove, two ends of the first metal rod are respectively provided with a first connecting terminal and a second connecting terminal, two ends of the second metal rod are respectively provided with a third connecting terminal and a fourth connecting terminal, the first connecting terminal and the second connecting terminal are respectively in threaded connection with two ends of the first metal rod, the third connecting terminal and the fourth connecting terminal are respectively in threaded connection with the second metal rod, the first metal rod and the second metal rod are respectively provided with a plurality of self-locking spring needles which are in contact with a test hole of a circuit board, and a needle cap of each self-locking spring needle is located on the first metal, The self-locking spring needle is pressed down, the needle body of the self-locking spring needle is reliably contacted with the test hole, and meanwhile, the self-locking spring needle is self-locked, so that the accurate positioning of the test hole is realized;
the jig is provided with auxiliary detection equipment, and comprises a positioning light source and an industrial magnifier, wherein the jig body is provided with an electric pan-tilt, the upper end of the electric pan-tilt is provided with an inverted L-shaped fixed rod, the inverted L-shaped fixed rod comprises a longitudinal rod and a transverse rod, the positioning light source is vertically suspended on the transverse rod of the inverted L-shaped fixed rod, the industrial magnifier is fixed at the end part of the transverse rod, the electric pan-tilt is electrically connected with a lithium battery, the longitudinal rod is fixedly connected with the transverse rod through a bent pipe, the longitudinal rod is provided with a longitudinally telescopic first switch, the transverse rod is provided with a transversely telescopic second switch, the transverse rod is hinged with the end part of the industrial magnifier, the positioning light source is irradiated without dead angle, the industrial magnifier is free and flexible;
the jig body is also provided with plate grooves for the circuit board to pass in and out, two sides of each plate groove are respectively provided with a fixing plate for fixing the circuit board, two ends of each fixing plate are provided with a through hole, the inner wall of each through hole is carved with threads, the through holes are in threaded connection with fixing screws, the notches of the plate grooves are provided with pulleys beneficial to the circuit board to slide, the peripheral surfaces of the pulleys are paved with anti-skidding layers, the pulleys are driven to rotate by a driving motor, the driving motor is electrically connected with a lithium battery, the sum of the radius of the pulleys and the thickness of the circuit board is smaller than the height of the notches, the height H of the notches is 0.8cm, the radius R of the pulleys is 0.2cm, the left end and the right end of the notches of the plate grooves are;
the jig of the invention can realize the fault detection of the circuit board by using any one of the following four test connection modes:
the first method comprises the following steps: the first main alligator clip is electrically connected with one connecting terminal of the multimeter, and the second auxiliary alligator clip is electrically connected with the other connecting terminal of the multimeter;
and the second method comprises the following steps: the first main alligator clip is electrically connected with one wiring terminal of the multimeter, and the second main alligator clip is electrically connected with the other wiring terminal of the multimeter;
and the third is that: the second auxiliary alligator clip is electrically connected with one connecting terminal of the multimeter, and the first auxiliary alligator clip is electrically connected with the other connecting terminal of the multimeter;
and fourthly: the second main alligator clip is electrically connected with one connecting terminal of the multimeter, and the first auxiliary alligator clip is electrically connected with the other connecting terminal of the multimeter;
the jig further comprises a control panel, the control panel is provided with a cradle head button for driving the electric cradle head to rotate, a driving switch for driving the driving motor to rotate and a lighting button for driving the positioning light source to be switched on and off, and the control panel is electrically connected with the lithium battery.
Starting a power supply, pressing a driving switch and an illumination button on a control panel, enabling a roller at a notch to rotate, enabling a circuit board to enter a board groove slowly when the circuit board is completely inserted into the board groove, closing the driving button, screwing a fixing screw and a fixing plate, simultaneously pressing the bottom of the fixing screw to press the upper surface of the circuit board, manually buckling buckles on two sides of the circuit board, and realizing the purpose of fixing the circuit board, wherein the bottom of the fixing screw is provided with buffering rubber, so that the circuit board is not scratched, pressing a pan-tilt button to drive an electric motor to rotate to an optimal test position, respectively moving a first metal bar and a second metal bar to be right above a target test hole, simultaneously adjusting a transverse rod and a longitudinal rod of an inverted L-shaped fixing rod, realizing that a positioning light source and an industry are positioned at the optimal test position, pressing the illumination button, and enabling naked eyes to penetrate through an industrial magnifier, and aligning the self-locking spring needle to a test hole on the circuit board, pressing the self-locking spring needle to the test hole to make the self-locking spring needle fully contact with the test hole, and executing fault detection of the circuit board by adopting any one of the four test connection modes.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures made by using the contents of the specification and the drawings, or other related technical fields, are encompassed by the present invention.
Claims (9)
1. The utility model provides a tool for circuit board fault detection which characterized in that: the crocodile detection device comprises a jig body (1), auxiliary detection equipment and crocodile clips, wherein the auxiliary detection equipment and the crocodile clips are fixed on the side wall of the jig body;
the jig body comprises a first sliding groove (2), a first metal rod (3) with two ends fixed on the first sliding groove, a second sliding groove (4), and a second metal rod (5) with two ends fixed on the second sliding groove, the first metal rod is connected with the first sliding groove in a sliding way, the second metal rod is connected with the second sliding groove in a sliding way, the first sliding groove is positioned above the second sliding groove, the two ends of the first metal rod are respectively provided with a first connecting terminal (6) and a second connecting terminal (27), the two ends of the second metal rod are respectively provided with a third connecting terminal (28) and a fourth connecting terminal (29), the first connecting terminal and the second connecting terminal are respectively in threaded connection with the two ends of the first metal rod, and the third connecting terminal and the fourth connecting terminal are respectively in threaded connection with the second metal rod, the first metal bar and the second metal bar are provided with a plurality of self-locking spring needles (8) which are in contact with a testing hole (7-1) of a circuit board (7), a needle cap (8-1) of each self-locking spring needle is positioned at the upper ends of the first metal bar and the second metal bar, and a needle body (8-2) of each self-locking spring needle is positioned at the lower ends of the first metal bar and the second metal bar;
the fixture body is also provided with a plate groove (9) for the circuit board to pass in and out, two sides of the plate groove are respectively provided with a fixing plate (10) for fixing the circuit board, two ends of each fixing plate are provided with a through hole (10-1), the inner wall of each through hole is carved with a thread, and the through holes are in threaded connection with fixing screws (11);
the auxiliary detection equipment comprises a positioning light source (12) and an industrial magnifier (13), the fixture body is provided with an electric pan-tilt (14), the upper end of the electric pan-tilt is provided with an inverted L-shaped fixing rod (15), the positioning light source is vertically suspended on a transverse rod (15-1) of the inverted L-shaped fixing rod, the industrial magnifier is fixed at the end part of the transverse rod, and the electric pan-tilt is electrically connected with a lithium battery (16);
the alligator clips comprise a first main alligator clip (17), a first auxiliary alligator clip (18), a second main alligator clip (19) and a second auxiliary alligator clip (20), the first main alligator clip is electrically connected with the first connecting terminal, the first auxiliary alligator clip is electrically connected with the second connecting terminal, the second main alligator clip is electrically connected with the third connecting terminal, and the second auxiliary alligator clip is electrically connected with the fourth connecting terminal;
the self-locking spring needle is in contact connection with the first metal rod and the second metal rod, and the first metal rod is not in contact with the second metal rod.
2. The jig for circuit board fault detection according to claim 1, characterized in that: the test connection mode of the jig is one of four types:
the first method comprises the following steps: the first main alligator clip is electrically connected with one connecting terminal of a multimeter (21), and the second auxiliary alligator clip is electrically connected with the other connecting terminal of the multimeter;
and the second method comprises the following steps: the first main alligator clip is electrically connected with one connecting terminal of the multimeter, and the second main alligator clip is electrically connected with the other connecting terminal of the multimeter;
and the third is that: the second auxiliary alligator clip is electrically connected with one connecting terminal of the multimeter, and the first auxiliary alligator clip is electrically connected with the other connecting terminal of the multimeter;
and fourthly: the second main alligator clip is electrically connected with a connecting terminal of the multimeter, and the first auxiliary alligator clip is electrically connected with another connecting terminal of the multimeter.
3. The jig for circuit board fault detection according to claim 1, characterized in that: including a plurality of pulleys (22), notch (9-1) in board groove is equipped with and does benefit to the circuit board is gliding the pulley, the skid resistant course has been laid to the global of pulley, the pulley is driven rotatoryly by driving motor (23), driving motor with the lithium cell electricity is connected, the radius of pulley with the thickness sum of circuit board is less than the height of notch, the height (H) of notch is 0.8cm, the radius (R) of pulley is 0.2 cm.
4. The jig for circuit board fault detection according to claim 1, characterized in that: the both ends of first metal bar with the both ends of second metal bar all are equipped with roll groove (24), the diameter of roll groove is less than first metal bar the diameter of second metal bar, each the external diameter of connecting terminal is not less than first sliding tray the width of second sliding tray, each the internal diameter of connecting terminal equals the diameter of roll groove, the width (W1) of first sliding tray is 1.2cm, the width (W2) of second sliding tray is 1.2cm, the diameter (D1) of roll groove is 1.1cm, each the internal diameter (D2) of connecting terminal is 1.1cm, each the external diameter (D3) of connecting terminal is 1.3cm, the diameter (D4) of first metal bar is 1.3cm, the diameter (D5) of second metal bar is 1.3 cm.
5. The jig for circuit board fault detection according to claim 1, characterized in that: the left end and the right end of the notch of the plate groove are respectively provided with a buckle (9-2) used for fixing the circuit board, and the buckles are connected with the plate groove through hinges.
6. The jig for circuit board fault detection according to claim 1, characterized in that: one of nitrile rubber, silicon rubber and fluororubber is laid at the bottom of the fixing screw.
7. The jig for circuit board fault detection according to claim 1, characterized in that: the inverted L-shaped fixing rod comprises a longitudinal rod (15-2) and a transverse rod, the longitudinal rod is fixedly connected with the transverse rod through a bent pipe (15-3), the longitudinal rod is provided with a first switch (15-4) which longitudinally stretches out and draws back, the transverse rod is provided with a second switch (15-5) which transversely stretches out and draws back, and the transverse rod is hinged to the end of the industrial magnifier.
8. The jig for circuit board fault detection according to claim 1, characterized in that: the jig body is provided with an arched handle (25) capable of lifting the jig body, and two ends of the arched handle are respectively fixed on the left side surface and the right side surface of the jig body.
9. The jig for circuit board fault detection according to claim 1, characterized in that: the positioning light source is one of a high-pressure sodium lamp, a metal halide lamp, an energy-saving lamp, a fluorescent lamp or an LED lamp, and is powered by the lithium battery.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810194204.1A CN108427019B (en) | 2018-03-09 | 2018-03-09 | A tool for circuit board fault detection |
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| CN201810194204.1A CN108427019B (en) | 2018-03-09 | 2018-03-09 | A tool for circuit board fault detection |
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| CN108427019B true CN108427019B (en) | 2020-06-09 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112379191A (en) * | 2020-10-13 | 2021-02-19 | 航天科工防御技术研究试验中心 | Burn-in test device |
| CN112453620B8 (en) * | 2021-01-13 | 2021-10-26 | 胡佳威 | Maintenance device capable of positioning and detecting faults of circuit board |
| CN112816857A (en) * | 2021-04-16 | 2021-05-18 | 国开启科量子技术(北京)有限公司 | Circuit board test system and manufacturing method thereof |
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| CN108427019A (en) | 2018-08-21 |
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Effective date of registration: 20200513 Address after: 514000 2 building, A plant, Heng Hui Electronics Co., Ltd., Xiyang Town Industrial Park, Meijiang District, Meizhou, Guangdong Applicant after: MEIZHOU ZHANZHI ELECTRONIC TECHNOLOGY Co.,Ltd. Address before: 215300, Jiangsu, Suzhou, Kunshan City, Pakistan Town East Village Applicant before: KUNSHAN HANHUI ELECTRONIC TECHNOLOGY Co.,Ltd. |
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