WO2020051828A1 - 线路板测试装置 - Google Patents

线路板测试装置 Download PDF

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Publication number
WO2020051828A1
WO2020051828A1 PCT/CN2018/105451 CN2018105451W WO2020051828A1 WO 2020051828 A1 WO2020051828 A1 WO 2020051828A1 CN 2018105451 W CN2018105451 W CN 2018105451W WO 2020051828 A1 WO2020051828 A1 WO 2020051828A1
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WIPO (PCT)
Prior art keywords
circuit board
board
base
lifting
rod
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PCT/CN2018/105451
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English (en)
French (fr)
Inventor
倪晔波
Original Assignee
太仓德纳森机电工程有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 太仓德纳森机电工程有限公司 filed Critical 太仓德纳森机电工程有限公司
Priority to DE212018000034.4U priority Critical patent/DE212018000034U1/de
Priority to PCT/CN2018/105451 priority patent/WO2020051828A1/zh
Publication of WO2020051828A1 publication Critical patent/WO2020051828A1/zh

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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
    • G01R31/2801—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP]
    • G01R31/2805—Bare printed circuit boards
    • 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
    • G01R1/06—Measuring leads; Measuring probes
    • G01R1/067—Measuring probes
    • G01R1/06711—Probe needles; Cantilever beams; "Bump" contacts; Replaceable probe pins
    • G01R1/06716—Elastic
    • G01R1/06722—Spring-loaded
    • 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
    • G01R31/2801—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP]
    • G01R31/2806—Apparatus therefor, e.g. test stations, drivers, analysers, conveyors
    • G01R31/2808—Holding, conveying or contacting devices, e.g. test adapters, edge connectors, extender boards

Definitions

  • the utility model belongs to the technical field of detection equipment, and particularly relates to a circuit board testing device.
  • PCB also called printed wiring board
  • PCB is an important electronic component.
  • electrical defects such as short circuits, open circuits and leakage caused by external factors, coupled with the continuous evolution of circuit boards to high density, fine pitch and multiple levels, if the failure is not timely
  • the board is screened out and left to flow into the next process, which will definitely cause more cost waste. Therefore, in addition to the process control, it is necessary to improve the technology of circuit board testing to improve product yield.
  • the main purpose of the utility model is to provide a circuit board testing device, which not only improves the safety and efficiency of circuit board detection, ensures the quality of the circuit board, but also effectively prevents the circuit board from being damaged during the detection process.
  • a circuit board testing device includes a workbench, a feeding mechanism, and an electric measuring mechanism, and the feeding mechanism and the electric measuring mechanism are both located on the workbench. Above, the electrical measuring mechanism is located downstream of the feeding mechanism;
  • the feeding mechanism includes a carrier board, a limit rod, and a lifting drive mechanism that drives the carrier board to move up and down.
  • a plurality of the circuit boards are placed above the carrier board, and the lower end of the limit rod is fixed to the workbench.
  • An upper end of the limit rod passes through the carrier board and is in contact with an edge of the circuit board;
  • the electrical measuring mechanism includes a stylus, a base, and a fixed frame, the stylus is fixed to the base, and the base is detachably connected to the fixed frame;
  • the fixing frame includes a support rod and a mounting rod, the support rod is provided with two, the lower ends of the two support rods are fixed to the workbench, and the upper ends of the two support rods are respectively connected to both ends of the mounting rod,
  • the mounting rod has a mounting hole matching the base, a positioning protrusion is provided on a side wall of the base, and an inner surface of the mounting hole is provided with a positioning recess corresponding to the positioning protrusion.
  • the controller further includes a controller, and the lifting driving mechanism and the stylus are electrically connected to the controller.
  • the lifting driving mechanism includes a lifting board and a lifting driving motor for driving the board to move up and down, the lifting board is located between the carrier board and the workbench, and the limit rod passes through the carrier board.
  • the carrier plate and the lifting plate are connected by a connecting member, the lifting driving motor is fixed to the lifting plate, an output shaft of the lifting driving motor is connected to a screw rod, and the screw rod is connected to a table.
  • the connecting member is a support spring
  • the support spring is sleeved on the limit rod, and two ends of the support spring are in contact with the lifting plate and the carrier plate, respectively.
  • the positioning protrusion is a ball, and the ball is installed in a positioning hole of the base.
  • a positioning spring is provided between the ball and the bottom surface of the positioning hole to make the ball protrude from the outer surface of the base.
  • the stylus is fixed on the lower surface of the base, at least one bar is provided on the side wall of the mounting hole, and the base is located above the bar.
  • the inner wall of the positioning hole is provided with a circle of limiting protrusions to restrict the balls from sliding out of the positioning hole.
  • the utility model comprises a feeding mechanism and an electric measuring mechanism.
  • the carrier board of the feeding mechanism is provided with a lifting driving mechanism that drives the circuit board to move up and down, so that the circuit board can be tested after being lifted. The personnel need not directly contact the circuit board being tested. Adopting automatic control to free up labor and improve detection efficiency;
  • the lower end of the limit rod of the utility model is fixed to the workbench, and the upper end of the limit rod passes through the carrier board and interferes with the edge of the circuit board.
  • the lifting drive mechanism includes a lifting board and a lifting drive motor that drives the board to move up and down.
  • the carrier board and the lifting board are connected by a connector.
  • the lifting drive motor is fixed to the lifting board, and the output shaft of the lifting drive motor is connected to the wire.
  • Rod connection, the screw is connected to the workbench, so that the circuit boards to be tested can be raised to the same height for testing;
  • the connecting piece of the utility model is a support spring, the support spring is sleeved on the limit rod, and the two ends of the support spring are in contact with the lifting plate and the carrier plate, so that when the stylus contacts the circuit board, the support spring acts on the circuit board. Buffer function to prevent the stylus from damaging the circuit board;
  • the base of the utility model is detachably connected to a fixed frame.
  • the base is provided with a ball, and the inner surface of the mounting hole is provided with a positioning recess corresponding to the ball, so that the base is stably installed on the mounting rod, which is convenient for the probe. Replacement to ensure the quality of the test, and even better, when the contact force between the stylus and the circuit board is too large, the base can fall off the mounting hole of the mounting rod, effectively preventing the circuit board from being damaged.
  • FIG. 1 is a schematic structural diagram of the present invention
  • FIG. 2 is a sectional view of a mounting rod of the present invention
  • FIG. 3 is a sectional view of a base of the present invention.
  • Table 1 feeding mechanism 2, carrier plate 21, limit lever 22, lifting plate 23, lifting driving motor 24, connecting piece 25, screw rod 26, electrical measuring mechanism 3, stylus 31, base 32, positioning protrusion 321, positioning hole 322, limiting protruding ring 3221, positioning spring 323, support rod 33, mounting rod 34, mounting hole 341, positioning recess 3411, bar 3412, circuit board 4 and controller 5.
  • the feeding mechanism 2 and the electric measuring mechanism 3 are both located at the station.
  • Above the workbench 1, the electrical measuring mechanism 3 is located downstream of the feeding mechanism 2;
  • the feeding mechanism 2 includes a carrier board 21, a limit rod 22, and a lifting drive mechanism that drives the carrier board 21 to move up and down.
  • a plurality of the circuit boards 4 are placed above the carrier board 21. The lower end is fixed to the workbench 1, and the upper end of the limit rod 22 passes through the carrier board 21 and is in contact with the edge of the circuit board 4;
  • the electrical measuring mechanism 3 includes a stylus 31, a base 32, and a fixing frame, the stylus 31 is fixed to the base 32, and the base 32 is detachably connected to the fixing frame;
  • the fixing frame includes a support rod 33 and a mounting rod 34.
  • the support rod 33 is provided with two, the lower ends of the two support rods 33 are fixed to the workbench 1, and the upper ends of the two support rods 33 are respectively installed with the mounting rods.
  • the two ends of the rod 34 are connected.
  • the mounting rod 34 has a mounting hole 341 matching the base 32.
  • the side wall of the base 32 is provided with a positioning protrusion 321.
  • the inner surface of the mounting hole 341 is provided.
  • a positioning recess 3411 corresponding to the positioning protrusion 321;
  • a controller 5 is further included, and the lifting driving mechanism and the stylus 31 are all electrically connected to the controller 5.
  • the lifting driving mechanism includes a lifting plate 23 and a lifting driving motor 24 that drives the circuit board 4 to move up and down.
  • the lifting plate 23 is located between the carrier plate 21 and the workbench 1, and the limit rod 22 passes through the carrier. Plate 21, the carrier plate 21 and the lifting plate 23 are connected by a connecting member 25, the lifting driving motor 24 is fixed to the lifting plate 23, and the output shaft of the lifting driving motor 24 is connected to the screw rod 26, so The screw rod 26 is connected to the table 1.
  • the connecting member 25 is a support spring, the support spring is sleeved on the limit rod 22, and two ends of the support spring are in contact with the lifting plate 23 and the carrier plate 21, respectively.
  • the positioning protrusion 321 is a ball, and the ball is installed in a positioning hole 322 of the base 32.
  • a positioning spring 323 is provided between the ball and the bottom surface of the positioning hole 322 so that the ball protrudes out of the base 32. surface.
  • the lower surface of the base 32 is fixed with the stylus 31, and the side wall of the mounting hole 341 is provided with at least one bar 3412, and the base 32 is located above the bar 3412.
  • a circle of limiting protrusions 3221 is provided on the inner wall of the positioning hole 322 to restrict the balls from sliding out of the positioning hole 322.
  • the working principle of the utility model is as follows. Several circuit boards are manually placed on the carrier board.
  • the lifting drive mechanism lifts the circuit board to a certain height under the control of the controller to detect the circuit board in contact with the stylus.
  • the support spring plays a certain role.
  • the buffering effect prevents the stylus from damaging the circuit board.
  • the circuit board is lowered by the lifting drive mechanism.
  • the circuit board detected at the top layer is manually removed, and the circuit board detection at the lower layer is continued to improve the circuit board detection. Safety and detection efficiency to ensure the quality of the circuit board.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • General Engineering & Computer Science (AREA)
  • Tests Of Electronic Circuits (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

一种线路板测试装置，包括工作台(1)、送料机构(2)和电测机构(3)，所述送料机构(2)和所述电测机构(3)皆位于所述工作台(1)的上方，所述电测机构(3)位于所述送料机构(2)的下游；所述送料机构(2)包括载板(21)、限位杆(22)和驱动所述载板上下升降的升降驱动机构，若干块所述线路板放置于载板(21)的上方，所述限位杆(22)的下端固定于工作台(1)，所述限位杆(22)的上端穿过所述载板 (21)且与所述线路板(4)的边缘抵触。本装置不仅提高线路板检测的安全性和检测效率，保证线路板的品质，而且有效防止线路板(4)在检测过程中损坏。

Description

线路板测试装置 技术领域
本实用新型属于检测设备技术领域，特别是涉及一种线路板测试装置。
背景技术
PCB又称印制线路板，是重要的电子部件。线路板在生产过程中，难免因外在因素而造成短路、断路及漏电等电性上的瑕疵，再加上线路板不断朝高密度、细间距及多层次的演进，若未能及时将不良板筛选出来，而任其流入下道制程，势必会造成更多的成本浪费，因此除了制程的管控外，势必要提高线路板测试的技术以提升产品良率。
目前线路板多采用人工进行检测，以确认线路板各部分的电路是否存在异常，但是人工检测效率低下，需要消耗大量的人力，无法满足企业大规模生产的需要，而且某些电测为高电压测试，由于测试电压过高，测试人员存在极大的安全隐患。
实用新型内容
本实用新型主要目的在于提供一种线路板测试装置，不仅提高线路板检测的安全性和检测效率，保证线路板的品质，而且有效防止线路板在检测过程中损坏。
为解决上述技术问题，本实用新型采用如下的一个技术方案：一种线路板测试装置，包括工作台、送料机构和电测机构，所述送料机构和所述电测机构皆位于所述工作台的上方，所述电测机构位于所述送料机构的下游；
所述送料机构包括载板、限位杆和驱动所述载板上下升降的升降驱动机构，若干块所述线路板放置于载板的上方，所述限位杆的下端固定于工作台，所述限位杆的上端穿过所述载板且与所述线路板的边缘抵触；
所述电测机构包括测针、基座和固定架，所述测针固定于基座，所述基座可拆卸连接于所述固定架；
所述固定架包括支撑杆和安装杆，所述支撑杆设有两根，两根所述支撑 杆的下端固定于工作台，两根所述支撑杆的上端分别与安装杆的两端连接，所述安装杆具有与所述基座相匹配的安装孔，所述基座的侧壁设有定位凸起，所述安装孔的内表面设有与所述定位凸起相对应的定位凹点；
还包括控制器，所述升降驱动机构、所述测针皆与所述控制器电连接。
进一步地说，所述升降驱动机构包括升降板和驱动线路板上下升降的升降驱动电机，所述升降板位于载板和工作台之间，且所述限位杆穿过所述载板，所述载板和所述升降板之间通过连接件连接，所述升降驱动电机固定于升降板，所述升降驱动电机的输出轴与丝杆连接，所述丝杆与工作台连接。
进一步地说，所述连接件为支撑弹簧，所述支撑弹簧套于所述限位杆，且所述支撑弹簧的两端分别与升降板和载板抵触。
进一步地说，所述定位凸起为滚珠，所述滚珠安装于基座的定位孔内，所述滚珠和定位孔的底面之间设有定位弹簧以使滚珠凸出于基座的外表面。
进一步地说，所述基座的下表面固定有所述测针，所述安装孔的侧壁设有至少一条档条，所述基座位于所述档条的上方。
进一步地说，所述定位孔的内壁设有一圈限位凸圈以限制滚珠从定位孔滑出。
本实用新型的有益效果至少具有以下几点：
本实用新型包括送料机构和电测机构，送料机构的载板设有驱动线路板上下升降的升降驱动机构，以将线路板抬升后进行检测，人员无需直接接触在检测的线路板，整个检测过程采用自动化控制，解放劳动力，提高检测效率；
本实用新型的限位杆的下端固定于工作台，限位杆的上端穿过载板且与线路板的边缘抵触，此种机构设计，可同时放置多块线路板，避免操作人员反复安放，值得一提的是，升降驱动机构包括升降板和驱动线路板上下升降的升降驱动电机，载板和升降板之间通过连接件连接，升降驱动电机固定于升降板，升降驱动电机的输出轴与丝杆连接，丝杆与工作台连接，从而保证需要检测的线路板可以升至同一高度进行检测；
本实用新型的连接件为支撑弹簧，支撑弹簧套于限位杆，且支撑弹簧的 两端分别与升降板和载板抵触，从而在测针与线路板接触时，支撑弹簧对线路板起到缓冲的作用，防止测针损坏线路板；
本实用新型的基座可拆卸连接于固定架，基座设有滚珠，安装孔的内表面设有与滚珠相对应的定位凹点，使基座稳定的安装于安装杆，便于对测针进行更换，保证检测质量，更佳的是，当测针与线路板之间接触的力过大时，基座可从安装杆的安装孔脱落，有效防止线路板损坏。
附图说明
图1是本实用新型的结构示意图；
图2是本实用新型的安装杆的剖视图；
图3是本实用新型的基座的剖视图；
图4是本实用新型的剖视图；
附图中各部件的标记如下：
工作台1、送料机构2、载板21、限位杆22、升降板23、升降驱动电机24、连接件25、丝杆26、电测机构3、测针31、基座32、定位凸起321、定位孔322、限位凸圈3221、定位弹簧323、支撑杆33、安装杆34、安装孔341、定位凹点3411、档条3412、线路板4和控制器5。
具体实施方式
下面结合附图对本实用新型的较佳实施例进行详细阐述，以使本实用新型的优点和特征能更易于被本领域技术人员理解，从而对本实用新型的保护范围做出更为清楚明确的界定。
实施例：一种线路板测试装置，如图1-4所示，本实用新型包括工作台1、送料机构2和电测机构3，所述送料机构2和所述电测机构3皆位于所述工作台1的上方，所述电测机构3位于所述送料机构2的下游；
所述送料机构2包括载板21、限位杆22和驱动所述载板21上下升降的升降驱动机构，若干块所述线路板4放置于载板21的上方，所述限位杆22的下端固定于工作台1，所述限位杆22的上端穿过所述载板21且与所述线路板4的边缘抵触；
所述电测机构3包括测针31、基座32和固定架，所述测针31固定于基座32，所述基座32可拆卸连接于所述固定架；
所述固定架包括支撑杆33和安装杆34，所述支撑杆33设有两根，两根所述支撑杆33的下端固定于工作台1，两根所述支撑杆33的上端分别与安装杆34的两端连接，所述安装杆34具有与所述基座32相匹配的安装孔341，所述基座32的侧壁设有定位凸起321，所述安装孔341的内表面设有与所述定位凸起321相对应的定位凹点3411；
还包括控制器5，所述升降驱动机构、所述测针31皆与所述控制器5电连接。
所述升降驱动机构包括升降板23和驱动线路板4上下升降的升降驱动电机24，所述升降板23位于载板21和工作台1之间，且所述限位杆22穿过所述载板21，所述载板21和所述升降板23之间通过连接件25连接，所述升降驱动电机24固定于升降板23，所述升降驱动电机24的输出轴与丝杆26连接，所述丝杆26与工作台1连接。
所述连接件25为支撑弹簧，所述支撑弹簧套于所述限位杆22，且所述支撑弹簧的两端分别与升降板23和载板21抵触。
所述定位凸起321为滚珠，所述滚珠安装于基座32的定位孔322内，所述滚珠和定位孔322的底面之间设有定位弹簧323以使滚珠凸出于基座32的外表面。
所述基座32的下表面固定有所述测针31，所述安装孔341的侧壁设有至少一条档条3412，所述基座32位于所述档条3412的上方。
所述定位孔322的内壁设有一圈限位凸圈3221以限制滚珠从定位孔322滑出。
本实用新型的工作原理如下，人工将若干块线路板放置于载板，升降驱动机构在控制器的控制下将线路板抬升至一定高度与测针接触对线路板进行检测，支撑弹簧起到一定的缓冲作用，防止测针损坏线路板，检测结束，线路板在升降驱动机构的作用下下降，人工取走最上层检测过的线路板，对下层的线路板继续进行检测，从而提高线路板检测的安全性和检测效率，保证 线路板的品质。
以上所述仅为本实用新型的实施例，并非因此限制本实用新型的专利范围，凡是利用本实用新型说明书及附图内容所作的等效结构变换，或直接或间接运用在其他相关的技术领域，均同理包括在本实用新型的专利保护范围内。

Claims (6)

  1. 一种线路板测试装置，其特征在于：包括工作台(1)、送料机构(2)和电测机构(3)，所述送料机构和所述电测机构皆位于所述工作台的上方，所述电测机构位于所述送料机构的下游；
    所述送料机构包括载板(21)、限位杆(22)和驱动所述载板上下升降的升降驱动机构，若干块所述线路板(4)放置于载板的上方，所述限位杆的下端固定于工作台，所述限位杆的上端穿过所述载板且与所述线路板的边缘抵触；
    所述电测机构包括测针(31)、基座(32)和固定架，所述测针固定于基座，所述基座可拆卸连接于所述固定架；
    所述固定架包括支撑杆(33)和安装杆(34)，所述支撑杆设有两根，两根所述支撑杆的下端固定于工作台，两根所述支撑杆的上端分别与安装杆的两端连接，所述安装杆具有与所述基座相匹配的安装孔(341)，所述基座的侧壁设有定位凸起(321)，所述安装孔的内表面设有与所述定位凸起相对应的定位凹点(3411)；
    还包括控制器(5)，所述升降驱动机构、所述测针皆与所述控制器电连接。
  2. 根据权利要求1所述的线路板测试装置，其特征在于：所述升降驱动机构包括升降板(23)和驱动线路板上下升降的升降驱动电机(24)，所述升降板位于载板和工作台之间，且所述限位杆穿过所述载板，所述载板和所述升降板之间通过连接件(25)连接，所述升降驱动电机固定于升降板，所述升降驱动电机的输出轴与丝杆(26)连接，所述丝杆与工作台连接。
  3. 根据权利要求2所述的线路板测试装置，其特征在于：所述连接件为支撑弹簧，所述支撑弹簧套于所述限位杆，且所述支撑弹簧的两端分别与升降板和载板抵触。
  4. 根据权利要求1所述的线路板测试装置，其特征在于：所述定位凸起为滚珠，所述滚珠安装于基座的定位孔(322)内，所述滚珠和定位孔的底面之间设有定位弹簧(323)以使滚珠凸出于基座的外表面。
  5. 根据权利要求1所述的线路板测试装置，其特征在于：所述基座的下 表面固定有所述测针，所述安装孔的侧壁设有至少一条档条(3412)，所述基座位于所述档条的上方。
  6. 根据权利要求4所述的线路板测试装置，其特征在于：所述定位孔的内壁设有一圈限位凸圈(3221)以限制滚珠从定位孔滑出。
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