CN209542780U - A kind of accurate four lines test device - Google Patents
A kind of accurate four lines test device Download PDFInfo
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- CN209542780U CN209542780U CN201822116265.4U CN201822116265U CN209542780U CN 209542780 U CN209542780 U CN 209542780U CN 201822116265 U CN201822116265 U CN 201822116265U CN 209542780 U CN209542780 U CN 209542780U
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- workbench
- jig
- test
- accurate
- test device
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Abstract
The utility model relates to a kind of accurate four lines test devices, including workbench, support plate is provided on workbench, test suite and conveying assembly, the test suite includes fixing seat and four line wire test machines, jig and lower jig are provided in fixing seat, upper jig and lower jig are located in the two sides of circuit board respectively, four pads to be tested on the circuit board are corresponded with four testing needles on the upper jig and lower jig respectively, four testing needles are respectively connected to jig ox horn, the jig ox horn is connected to four line wire test machines and is tested, fixing seat is movably connected by driving assembly and workbench, fixing seat and the matching design of driving assembly can be very good to adjust the use position of test suite, it is tested so as to the circuit board to different location.
Description
Technical field
The utility model relates to circuit board testing technical field of processing equipment, in particular to a kind of accurate four lines test dresses
It sets.
Background technique
With the complication of electronic product and the miniaturization of electronic product, the contact distance of integrated circuit elements contracts therewith
Small, the encapsulation of mobile electron motherboard is increasingly intensive, and the requirement to carrier HDI (high density interconnection) circuit board is higher and higher, circuit
The line space density of plate is closer and closer, also has higher requirement to the wiring technique of circuit board, in PCB test or FPC test,
The project that must test when high-voltage isulation test is the production of PCB factory, it can be effectively detected out between the line of PCB there are copper ashes or
Foreign matter generates micro- short unfavorable condition.According to test experience: whether test result is credible, having with the stability of test signal very big
Relationship, therefore, the optimal path for improving test result confidence level is exactly the stability for improving test signal, number of patent application
201520956573.1 disclose a kind of PCB and FPCB precision four-wire type test macro, mainly pass through some controls of setting
Circuit for test process provides a stable Hi-pot test signal, in addition, by improving to press, so that whole knot
Structure is more reasonable and compact, and still, the testing needle of the prior art during the test, is easy to stay in printed circuit plate surface
Under very serious bundle trace, influence the quality of printed circuit board, can only judge it is common open short circuit, be unable to micrometer resistance, in addition, for
Testing unacceptable circuit board cannot be reminded and be collected well, need manually constantly to be observed, this mode of operation
A large amount of manual labors can be expended, the utility model proposes a kind of new solution according to problem above.
Utility model content
It is to be solved in the utility model be in the prior art circuit board testing device have a single function, test result it is inaccurate
And expend a large amount of manual labors the problems such as, the utility model proposes a solution in view of the above problems, solved more than
Problem.
The technical solution that the utility model solves above-mentioned technical problem is as follows: a kind of accurate four lines test device, including work
Make platform, support plate, test suite and conveying assembly are provided on workbench, support plate is connected with workbench, the survey
Try component installation on the supporting plate, the test suite includes fixing seat and four line wire test machines, is provided in fixing seat
Jig and lower jig, upper jig and lower jig are located in the two sides of circuit board, four test welds to be measured on the circuit board respectively
Disk is corresponded with four testing needles on the upper jig and lower jig respectively, and four testing needles are respectively connected to jig
Ox horn, the jig ox horn are connected to four line wire test machines and are tested, and fixing seat is living by driving assembly and workbench
Dynamic to be connected, workbench is internally provided with accommodating chamber, and four line wire test machines are mounted in the accommodating chamber inside workbench, work
Make to be provided with multiple string holes on platform, the conducting wire for testing connection can pass through string holes and connect each equipment, workbench
It is provided with heat release hole on side wall, is provided with radiator on the inside of heat release hole, which is connected with the inner wall of workbench, work
Make platform both ends and be respectively arranged with test passes region and test failure region, workbench upper surface, which is provided with, to be extended downwardly
Strip groove, the penetrating connection of accommodating chamber inside the strip groove and workbench, the conveying assembly respectively with strip groove and
Accommodating chamber is equipped with.
Fixing seat and the matching design of driving assembly can be very good to adjust the use position of test suite, so as to right
The circuit board of different location is tested, and the design of test suite can quickly test circuit board, use cost
It is lower, greatly reduce for estimated cost, the design of heat release hole and radiator can be very good to accommodating chamber carry out
Heat dissipation, prevents it from influencing the normal use of equipment, the design in test passes region and test failure region due to overheat
It can be very good to distinguish the detection case of circuit board, reduce the sorting work amount in staff's later period.
Based on the above technical solution, the utility model can also do following improvement.
In any of the above-described scheme preferably, the conveying assembly includes master gear, pinion, conveyor chain and conveying
Motor, conveyor chain are connected with master gear and pinion respectively, and master gear, pinion and feeder motor are separately mounted to accommodating chamber
In, feeder motor is connected with master gear, and fixed block is equipped on conveyor chain, and fixed block upper surface is equipped with circuit board clamping group
Part, fixed block a part are mounted in strip groove, the external AC power source of feeder motor.
In any of the above-described scheme preferably, the circuit board clamp assemblies include bearing plate, the bearing plate and fixation
Block is adjustable to link together, and one end of bearing plate is provided with the fixing groove extended inwardly, and bearing plate upper surface is provided with
With fixing groove mutually penetrating the first threaded hole, fastener is connected on the first threaded hole.
In any of the above-described scheme preferably, the fastener includes the first bolt, and the first bolt bottom end is connected with rubber
Rubber mat.
In any of the above-described scheme preferably, it is additionally provided with adjustment hole on the bearing plate, has been provided on fixed block
The second threaded hole corresponding with adjustment hole, bearing plate and fixed block are connected with each other by the second bolt.
In any of the above-described scheme preferably, the driving component includes driving motor and ball-screw, ball-screw
Across fixing seat and both ends pass through bearing respectively and are connected with support plate, and ball-screw is to be threadedly coupled with fixing seat, driving motor
It is connected with ball-screw, the external AC power source of driving motor.
In any of the above-described scheme preferably, the radiator includes mounting rack, and multiple dissipate is provided on mounting rack
Heat fan, multiple heat emission fans pass through the external AC power source of power supply line respectively.
In any of the above-described scheme preferably, the side of workbench is provided with electric control box, the electrical control
Case includes cabinet, and touch screen, encoder, controller and motor driver are provided on cabinet, and touch screen, encoder and motor drive
Dynamic device is electrically connected with controller respectively, and feeder motor and driving motor are electrically connected with motor driver respectively.
In any of the above-described scheme preferably, the controller is PLC controller.
In any of the above-described scheme preferably, the heat release hole is provided with multiple, is provided on each heat release hole
Air Filter.
In any of the above-described scheme preferably, the test passes region and test failure region are respectively arranged with
Circuit board collecting frame.
In any of the above-described scheme preferably, the feeder motor and driving motor are respectively servo motor.
The beneficial effects of the utility model are: fixing seat and the matching design of driving assembly can be fine in the utility model
Adjusting test suite use position, tested so as to the circuit board to different location, the design of test suite can
Quickly to test circuit board, use cost is lower, greatly reduce for estimated cost, heat release hole and dissipate
The design of thermal can be very good to radiate to accommodating chamber, prevent it from influencing the normal use of equipment due to overheat, survey
The design for trying qualified region and test failure region can be very good to distinguish the detection case of circuit board, reduce
The sorting work amount in staff's later period.
Detailed description of the invention
Fig. 1 is the overall structure diagram according to a preferred embodiment of the four line test device of precision of the utility model；
Fig. 2 is the fit structure schematic diagram of fixed block and bearing plate in Fig. 1；
Fig. 3 is the attachment structure schematic diagram in Fig. 1 inside control electronic box between each electrical component；
Fig. 4 is the structural schematic diagram of fastener in Fig. 1；
Fig. 5 is the attachment structure schematic diagram of cabinet and workbench in Fig. 1；
In attached drawing, parts list represented by the reference numerals are as follows:
1, workbench, 2, support plate, 3, fixing seat, 4, four line wire test machines, 5, upper jig, 6, lower jig, 7, electricity
Road plate, 8, testing needle, 9, jig ox horn, 10, accommodating chamber, 11, heat release hole, 12, test passes region, 13, test failure area
Domain, 14, strip groove, 15, master gear, 16, pinion, 17, conveyor chain, 18, feeder motor, 19, fixed block, 20, bearing plate,
21, fixing groove, the 22, first threaded hole, the 23, first bolt, 24, adjustment hole, the 25, second threaded hole, 26, driving motor, 27, rolling
Ballscrew, 28, mounting rack, 29, heat emission fan, 30, cabinet, 31, touch screen, 32, encoder, 33, controller, 34, motor driven
Device, 35, rubber pad.
Specific embodiment
The principles of the present invention and feature are described below in conjunction with attached drawing, example is served only for explaining that this is practical
It is novel, it is not intended to limit the scope of the utility model.
Embodiment 1: as shown in Figures 1 to 5, a kind of accurate four lines test device, including workbench 1, on workbench 1
It is provided with support plate 2, test suite and conveying assembly, support plate 2 is connected with workbench 1, and the test suite is mounted on branch
On fagging 2, the test suite includes fixing seat 3 and four line wire test machines 4, and jig 5 is provided in fixing seat 3 and is controlled under
Tool 6, upper jig 5 and lower jig 6 are located in the two sides of circuit board 7 respectively, the pad difference to be tested of four on the circuit board 7
It is corresponded with four testing needles 8 on the upper jig 5 and lower jig 6, four testing needles 8 are respectively connected to jig
Ox horn 9, the jig ox horn 9 are connected to four line wire test machines 4 and are tested, and fixing seat passes through driving assembly and workbench
1 is movably connected, and workbench 1 is internally provided with accommodating chamber 10, and four line wire test machines 4 are mounted on the appearance inside workbench 1
It receives in chamber 10, multiple string holes is provided on workbench 1, the conducting wire for testing connection can pass through string holes and connect each equipment
Come, heat release hole 11 is provided on the side wall of workbench 1, is provided with radiator on the inside of heat release hole 11, the radiator and work
The inner wall for making platform 1 is connected, and 1 both ends of workbench are respectively arranged with test passes region 12 and test failure region 13, work
Make 1 upper surface of platform and be provided with the strip groove 14 extended downwardly, the strip groove 14 and the accommodating chamber 10 inside workbench 1 are penetrating
Connection, the conveying assembly are equipped with strip groove 14 and accommodating chamber 10 respectively, and fixing seat 3 and the cooperation of driving assembly are set
Meter can be very good to adjust the use position of test suite, test so as to the circuit board 7 to different location, test group
The design of part can quickly test circuit board 7, and use cost is lower, greatly reduce for estimated cost,
The design of heat release hole 11 and radiator can be very good to radiate to accommodating chamber 10, prevent it from influencing due to overheat
The design in the normal use of equipment, test passes region 12 and test failure region 13 can be very good to circuit board 7
Detection case distinguishes, and reduces the sorting work amount in staff's later period.
In order to using conveying assembly, can preferably be conveyed to circuit board by conveying assembly, reduction manual labor,
In further specific embodiment, the conveying assembly includes master gear 15, pinion 16, conveyor chain 17 and conveying electricity
Machine 18, conveyor chain 17 are connected with master gear 15 and pinion 16 respectively, and master gear 15, pinion 16 and feeder motor 18 divide
It is not mounted in accommodating chamber 10, feeder motor 18 is connected with master gear 15, and fixed block 19, fixed block are equipped on conveyor chain 17
19 upper surfaces are equipped with circuit board clamp assemblies, and 19 a part of fixed block is mounted in strip groove 14, the external friendship of feeder motor 18
Galvanic electricity source.
In order to preferably be fixed and test to circuit board, in further specific embodiment, the circuit board folder
Holding component includes bearing plate 20, the bearing plate 20 with fixed block 19 is adjustable links together, one end setting of bearing plate 20
There is the fixing groove 21 extended inwardly, 20 upper surface of bearing plate is provided with first threaded hole 22 mutually penetrating with fixing groove 21,
It is connected with fastener on first threaded hole 22, ensure that the stabilization in circuit board purple test process by circuit board clamp assemblies
Property, it will not shake.
In order to which preferably board circuit plate is fixed, prevent from wearing it, in further specific embodiment party
In formula, the fastener includes the first bolt 23, and 23 bottom end of the first bolt is connected with rubber pad 35.
In order to preferably use bearing plate and fixed block, and it is attached, in further specific embodiment,
It is additionally provided with adjustment hole 24 on the bearing plate 20, second threaded hole corresponding with adjustment hole 24 is provided on fixed block 19
25, bearing plate 20 and fixed block 19 are connected with each other by the second bolt.
In order to preferably use driving assembly, in further specific embodiment, the driving component includes driving electricity
Machine 26 and ball-screw 27, ball-screw 27 passes through fixing seat 3 and both ends pass through bearing respectively and are connected with support plate 2, ball wire
Thick stick 27 is to be threadedly coupled with fixing seat 3, and driving motor 26 is connected with ball-screw 27, the external AC power source of driving motor 26.
In order to preferably use radiator, in further specific embodiment, the radiator includes mounting rack
28, multiple heat emission fans 29 are provided on mounting rack 28, multiple heat emission fans 29 pass through the external AC power source of power supply line respectively.
In order to preferably control feeder motor and driving motor, in further specific embodiment, work is flat
The side of platform 1 is provided with electric control box, and the electric control box includes cabinet 30, and touch screen 31 is provided on cabinet 30, is compiled
Code device 32, controller 33 and motor driver 34, touch screen 31, encoder 32 and motor driver 34 respectively with controller 33
It is electrically connected, feeder motor 18 and driving motor 26 are electrically connected with motor driver 34 respectively, this practical described controller 33
It is preferable to use programmable PLC controller, it is preferable to use Mitsubishi PLC FX3U-64MR-ES-A, the types of motor driver 34 for model
Number it is preferable to use Killmorgen AKDTMSeries, specially AKD-x00306, the preferred model RE1103-EC1 of encoder 32, touching
31 preferred model MT6070iH of screen are touched, it is the prior art, herein not that the above preferred equipment can be bought on the market
Its circuit connection structure is described.
In order to preferably use heat release hole, prevent dust from entering inside workbench, in further specific embodiment
In, the heat release hole 11 is provided with multiple, is provided with Air Filter on each heat release hole 11.
In order to preferably be distinguished to circuit board, in further specific embodiment, the test passes region 12
And test failure region 13 is respectively arranged with circuit board collecting frame.
In order to preferably using feeder motor and driving motor, improve its stability, in further specific embodiment,
The feeder motor 18 and driving motor 26 are respectively servo motor.
Embodiment 2:
Integrated automation operating process is:
1, man-machine communication is completed by touch screen 31, it will be in the parameter recording program of needs；
2, encoder 32 is used to acquire and monitor 26 operating condition of feeder motor 18 and driving motor；
3, controller 33 is used to store main program and acquisition or prefabricated each parameter is carried out operation；
4, operation result is sent to motor driver 34, and motor driver 34 will accurately control conveying electricity according to operation result
The all numbers and angle that machine 18 and driving motor 26 operate；
Embodiment 3:
As shown in Figs. 1-5, when in use, every control parameter is inputted by touch screen 31, passes through driving motor 26 first
Ball-screw 27 is driven, adjust fixing seat 3 uses position, can flexibly use, and is then inserted into one end of circuit board 7 solid
Determine in slot 21, rotates the first bolt 23, until rubber pad 35 clamps the circuit board 7 protruded into fixing groove 21, the utility model
It is preferred that workbench 1 is close to the starting point that the one end in test failure region 13 is that circuit board 7 conveys, then feeder motor 18 is right
Master gear 15 drives, and conveyor chain 17 drives fixed block 19 mobile, and fixed block 19 drives circuit board 7 mobile, until circuit board 7 into
Enter the set distance to program, at this point, circuit board 7 is between upper jig 5 and lower jig 6, four testing needles 8 respectively with circuit
Four pads to be tested on plate 7 correspond, and four testing needles 8 are respectively connected to jig ox horn 9, the connection of jig ox horn 9 four
Line wire test machine 4 is tested by four line wire test machines 4, the type of four lines wire test machine 4 described in the utility model
Number it is preferable to use for DY-360, in addition, adjustable its of bearing plate described in the utility model 20 uses position, after the completion of adjusting
It passes through adjustment hole 24 and the second threaded hole 25 by the second bolt bearing plate 20 and fixed block 19 are fixed together.
In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " suitable
The orientation or positional relationship of the instructions such as hour hands ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " is orientation based on the figure
Or positional relationship, be merely for convenience of describing the present invention and simplifying the description, rather than the device of indication or suggestion meaning or
Element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as the limit to the utility model
System.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.The meaning of " plurality " is at least two, such as two in the description of the present invention,
It is a, three etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be
Mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary
The interaction relationship of connection or two elements inside element, unless otherwise restricted clearly.For the common skill of this field
For art personnel, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the present invention unless specifically defined or limited otherwise, fisrt feature is in the second feature " on " or " down "
It can be that the first and second features directly contact or the first and second features are by intermediary mediate contact.Moreover, first is special
Sign can be fisrt feature above the second feature " above ", " above " and " above " and be directly above or diagonally above the second feature, or only
Indicate that first feature horizontal height is higher than second feature.Fisrt feature under the second feature " below ", " below " and " below " can be with
It is that fisrt feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term
It states and is necessarily directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be with
It can be combined in any suitable manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this field
Technical staff can by the feature of different embodiments or examples described in this specification and different embodiments or examples into
Row combination and combination.
Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it should not be understood as limiting the present invention, those skilled in the art are in the scope of the utility model
Inside it can make changes, modifications, alterations, and variations to the above described embodiments.
Claims (10)
1. a kind of accurate four lines test device, including workbench (1), which is characterized in that workbench is provided with support on (1)
Plate (2), test suite and conveying assembly, support plate (2) are connected with workbench (1), and the test suite is mounted on support plate
(2) on, the test suite includes fixing seat (3) and four line wire test machines (4), is provided with jig (5) in fixing seat (3)
With lower jig (6), upper jig (5) and lower jig (6) are located in the two sides of circuit board (7) respectively, and four on the circuit board (7)
A pad to be tested is corresponded with four testing needles (8) on the upper jig (5) and lower jig (6) respectively, and described four
Testing needle (8) is respectively connected to jig ox horn (9), and the jig ox horn (9) is connected to four line wire test machines (4), fixing seat
It is movably connected by driving assembly and workbench (1), workbench (1) is internally provided with accommodating chamber (10), and four line wire rods are surveyed
Test-run a machine (4) is mounted in the internal accommodating chamber (10) of workbench (1), and multiple string holes are provided on workbench (1), and work is flat
It is provided on the side wall of platform (1) heat release hole (11), is provided with radiator on the inside of heat release hole (11), the radiator and work are flat
The inner wall of platform (1) is connected, and workbench (1) both ends are respectively arranged with test passes region (12) and test failure region
(13), workbench (1) upper surface is provided with the strip groove (14) extended downwardly, in the strip groove (14) and workbench (1)
Accommodating chamber (10) the penetrating connection in portion, the conveying assembly are equipped with strip groove (14) and accommodating chamber (10) respectively.
2. accurate four lines test device according to claim 1, which is characterized in that the conveying assembly includes master gear
(15), pinion (16), conveyor chain (17) and feeder motor (18), conveyor chain (17) respectively with master gear (15) and secondary tooth
It takes turns (16) to be connected, master gear (15), pinion (16) and feeder motor (18) are separately mounted in accommodating chamber (10), feeder motor
(18) it is connected with master gear (15), is equipped on conveyor chain (17) fixed block (19), fixed block (19) upper surface is equipped with electricity
Road plate clamp assemblies, fixed block (19) a part are mounted in strip groove (14), feeder motor (18) external AC power source.
3. accurate four lines test device according to claim 2, which is characterized in that the circuit board clamp assemblies include holding
Fishplate bar (20), the bearing plate (20) with fixed block (19) is adjustable links together, one end of bearing plate (20) be provided with to
The fixing groove (21) that inside extends, bearing plate (20) upper surface are provided with first threaded hole mutually penetrating with fixing groove (21)
(22), fastener is connected on the first threaded hole (22).
4. accurate four lines test device according to claim 3, which is characterized in that the fastener includes the first bolt
(23), the first bolt (23) bottom end is connected with rubber pad (35).
5. accurate four lines test device according to claim 4, which is characterized in that be additionally provided on the bearing plate (20)
Adjustment hole (24), is provided with the second threaded hole (25) corresponding with adjustment hole (24) on fixed block (19), bearing plate (20) and
Fixed block (19) is connected with each other by the second bolt.
6. accurate four lines test device according to claim 5, which is characterized in that the driving component includes driving motor
(26) and ball-screw (27), ball-screw (27) passes through fixing seat (3) and both ends pass through bearing and support plate (2) phase respectively
Even, ball-screw (27) is to be threadedly coupled with fixing seat (3), and driving motor (26) is connected with ball-screw (27), driving motor
(26) external AC power source.
7. accurate four lines test device according to claim 1, which is characterized in that the radiator includes mounting rack
(28), it is provided with multiple heat emission fans (29) on mounting rack (28), multiple heat emission fans (29) pass through the external alternating current of power supply line respectively
Source.
8. accurate four lines test device according to claim 6, which is characterized in that the side of workbench (1) is provided with
Electric control box, the electric control box include cabinet (30), be provided on cabinet (30) touch screen (31), encoder (32),
Controller (33) and motor driver (34), touch screen (31), encoder (32) and motor driver (34) respectively with controller
(33) it is electrically connected, feeder motor (18) and driving motor (26) are electrically connected with motor driver (34) respectively.
9. accurate four lines test device according to claim 1, which is characterized in that the heat release hole (11) is provided with more
It is a, Air Filter is provided on each heat release hole (11).
10. accurate four lines test device according to claim 6, which is characterized in that the feeder motor (18) and driving
Motor (26) is respectively servo motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822116265.4U CN209542780U (en) | 2018-12-17 | 2018-12-17 | A kind of accurate four lines test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822116265.4U CN209542780U (en) | 2018-12-17 | 2018-12-17 | A kind of accurate four lines test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209542780U true CN209542780U (en) | 2019-10-25 |
Family
ID=68264870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822116265.4U Expired - Fee Related CN209542780U (en) | 2018-12-17 | 2018-12-17 | A kind of accurate four lines test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209542780U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115616331A (en) * | 2022-12-19 | 2023-01-17 | 深圳市高麦电子有限公司 | Precise four-wire type testing machine |
| CN116298771A (en) * | 2022-12-12 | 2023-06-23 | 东莞市众浩轩电子科技有限公司 | Single-channel testing machine capable of preventing offset detection |
-
2018
- 2018-12-17 CN CN201822116265.4U patent/CN209542780U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116298771A (en) * | 2022-12-12 | 2023-06-23 | 东莞市众浩轩电子科技有限公司 | Single-channel testing machine capable of preventing offset detection |
| CN115616331A (en) * | 2022-12-19 | 2023-01-17 | 深圳市高麦电子有限公司 | Precise four-wire type testing machine |
| CN115616331B (en) * | 2022-12-19 | 2023-12-01 | 深圳市高麦电子有限公司 | Precise four-wire type testing machine |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191025 Termination date: 20211217 |
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| CF01 | Termination of patent right due to non-payment of annual fee |