WO2016078279A1 - 测试治具 - Google Patents

测试治具 Download PDF

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Publication number
WO2016078279A1
WO2016078279A1 PCT/CN2015/075013 CN2015075013W WO2016078279A1 WO 2016078279 A1 WO2016078279 A1 WO 2016078279A1 CN 2015075013 W CN2015075013 W CN 2015075013W WO 2016078279 A1 WO2016078279 A1 WO 2016078279A1
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WO
WIPO (PCT)
Prior art keywords
plate
test fixture
signal source
test
backlight module
Prior art date
Application number
PCT/CN2015/075013
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English (en)
French (fr)
Inventor
薛李伟
李剑
王德超
Original Assignee
京东方科技集团股份有限公司
京东方（河北）移动显示技术有限公司
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Application filed by 京东方科技集团股份有限公司, 京东方（河北）移动显示技术有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US14/767,956 priority Critical patent/US9880407B2/en
Publication of WO2016078279A1 publication Critical patent/WO2016078279A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/1306—Details
    • G02F1/1309—Repairing; Testing
    • 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
    • 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 present invention relates to the field of display technologies, and in particular, to a test fixture, and more particularly to a test fixture having a better inspection angle of view and convenient installation and maintenance.
  • LCD Chinese name is Liquid Crystal Display
  • auxiliary tool can provide a signal connection between the LCD and the test signal, and connect the test point of the signal source to the test point corresponding to the product to be tested, and complete the dam inspection of the product to be tested in the lighting state.
  • test fixtures have many defects in application: First, the fixture itself and the signal source are separated, and the two must be connected by an external cable when in use. In this way, the whole equipment will be disorderly placed on the operation site, which is not conducive to the operation and unified management of the workshop. Moreover, in general, the fixture only operates on the horizontal surface during the signal test, and does not provide a good inspection angle. Conducive to rapid production; secondly, the polarizer on the fixture is generally attached directly to the surface of the stage by using an acrylic plate, which not only causes the transmittance of the polarizer to be low, but also easily causes serious scratches, greatly increasing the replacement.
  • the fixture stage and the backlight module are usually integrated, that is, the backlight module is directly fixed in the backlight module slot behind the stage, which is not convenient for cleaning and maintenance of the backlight module;
  • the probe mounting end on the indenter does not evade. When the indenter reciprocates, it will cause damage at the non-test point, causing unnecessary damage.
  • test fixture that can effectively perform a lighting test on a product to be tested, is convenient for integrated operation, has a better inspection angle of view, and is convenient for installation and maintenance.
  • the technical problem to be solved by the invention is to provide a test fixture, which can effectively perform the lighting test on the product to be tested, facilitates the integrated operation, has a better detection angle, and is convenient for installation and maintenance.
  • the present invention provides a test fixture comprising a base, a signal source, a work stage and a crimping mechanism; the base is provided with an inclined surface carrying the working stage and the crimping mechanism; The signal source is located on the base; the crimping mechanism is configured to apply a test signal sent by the signal source to the product to be tested; and the working stage performs a light test on the product to be tested. test.
  • a turning unit is disposed above the working stage, one side of the turning unit is rotatably connected to the working stage; and a backlight module mounting board is disposed under the working stage.
  • the backlight module mounting board is detachably connected to the working stage; the product to be tested is disposed on the working stage and located between the flipping unit and the backlight module mounting board; the first polarizer is fixed on the flipping unit; A backlight is fixed on the backlight module mounting plate, and a second polarizer is fixed on the backlight.
  • the inverting unit includes a rotating frame, a hinge and a fixing plate, one side of the rotating frame is mounted on the working stage by a hinge; the fixing plate passes the first polarizer through the double layer The glass plate is clamped to the rotating frame.
  • the backlight module mounting plate is provided with a first positioning post
  • the working loading platform is provided with a mounting hole
  • the first positioning post is located in the mounting hole
  • the work stage and the backlight module mounting board are connected by a magnetic member.
  • the working stage is provided with a fourth positioning post for limiting the product to be tested.
  • a lateral adjustment plate, a longitudinal adjustment plate, and a bottom plate are sequentially disposed from the top to the bottom of the backlight module mounting plate; the lateral adjustment plate is provided with a circuit board for driving the backlight a mounting groove; the bottom plate is fixed on the inclined surface, the longitudinal adjustment plate moves in the Y direction, and the lateral adjustment plate moves in the X direction.
  • the lateral adjustment plate is provided with a transverse groove
  • the longitudinal adjustment plate is provided with a second positioning post
  • the second positioning post is located in the transverse groove
  • the bottom plate is provided with a third positioning post
  • the third positioning post is located in the longitudinal slot
  • the crimping mechanism includes a driving unit and a pressing head; the driving unit drives the pressing head to move in a Z direction; and one end of the pressing head is provided with a protrusion and is disposed on the protrusion There are a plurality of probes; one end of the probe is electrically connected to the signal source, and the other end is in contact with the test point of the product to be tested.
  • the driving unit includes a frame, a rotating handle, an eccentric block, a supporting plate and an elastic member; the frame is located on an inclined surface, and a guiding shaft is disposed in the frame; the elastic member and the supporting plate are both Nested on the guide shaft, and the elastic member is located below the support plate; the indenter is fixedly connected to one side of the support plate; the eccentric block is located above the support plate; The turning handle drives the eccentric block to be pressed against the support plate; the support plate moves in the axial direction of the guide shaft by the eccentric block.
  • a control button is connected to the signal source, and the control button is used to switch a test signal sent by the signal source.
  • the signal source is fixed to the inside of the base by a signal source mounting plate; the control button is located on a side plate of the base.
  • the angle between the inclined surface and the horizontal plane is 40° to 50°.
  • the test fixture provided by the invention can effectively complete the lighting test of the product to be tested, and the integrated design of the base, the signal source, the work stage and the crimping mechanism facilitates management and Maintenance; Moreover, an inclined surface carrying the working stage and the crimping mechanism is further disposed on the base to have a better detection angle of view, thereby facilitating operation and production.
  • FIG. 1 is a perspective view of a test fixture according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural view of an indenter according to an embodiment of the present invention.
  • Figure 3 is a side elevational view of the indenter of the embodiment of the present invention.
  • FIG. 4 is a schematic structural view of a working stage according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a backlight module mounting board according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural view of a lateral adjustment plate according to an embodiment of the present invention.
  • Figure 7 is a schematic structural view of a longitudinal adjustment plate according to an embodiment of the present invention.
  • Figure 8 is a schematic view of the backplane of the embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a flip unit according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural view of a base according to an embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of a signal source mounting board according to an embodiment of the present invention.
  • Figure 12 is a side elevational view of the base of the embodiment of the present invention.
  • Figure 13 is a schematic view showing the structure of a crimping mechanism according to an embodiment of the present invention.
  • 1 base; 2: signal source; 3: working stage; 4: crimping mechanism; 5: flip unit; 6: backlight module mounting board; 7: lateral adjustment board; 8: longitudinal adjustment board; ; 11: first positioning column; 12: second positioning column; 13: third positioning column; 14: fourth positioning column; 21: control button; 22: signal source mounting plate; 31: mounting hole; 32: magnetic component ; 33: positioning groove; 41: indenter; 42: frame; 43: rotating handle; 44: eccentric block; 45: support plate; 46: elastic member; 47: guide shaft; 51: rotating frame; 52: hinge; 53: fixed plate; 71: Transverse groove; 72: drive circuit board mounting groove; 81: longitudinal groove; 411: protrusion; 412: probe.
  • the terms “installation”, “connected”, and “connected” are to be understood broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; It can also be an electrical connection; it can be directly connected or indirectly connected via an intermediate medium.
  • the specific meaning of the above terms in the present invention can be understood in a specific case by those skilled in the art.
  • the test fixture provided in this embodiment includes a base 1, a signal source 2, a work stage 3 and a crimping mechanism 4; and the base 1 is provided with a tilt carrying the working stage 3 and the crimping mechanism 4.
  • the angle between the inclined surface and the horizontal surface can be flexibly adjusted according to requirements.
  • the angle can be 40°-50°, and the optimum angle is 45°.
  • the purpose is to provide the best inspection angle for the staff.
  • the test signal for detecting the product to be tested can be directly formed through the signal source 2, thereby facilitating integrated operation and management; in addition, the side of the crimping mechanism 4 and the working stage 3
  • the corresponding setting is used to apply the test signal sent by the signal source 2 to the product to be tested; at the same time, the working stage 3 can be used to perform the lighting test after the signal of the product to be tested is connected.
  • the test fixture realizes the integrated operation of the whole device, has a better detection angle, and is convenient for installation and maintenance.
  • a reversing unit 5 is provided above the working stage 3, and one side of the reversing unit 5 is rotatably connected to the working stage 3;
  • a backlight module mounting board 6 is disposed under the table 3, and a detachable connection between the backlight module mounting board 6 and the working stage 3 is provided;
  • the product to be tested is disposed on the working stage 3 and located at the flip unit 5 and the backlight module mounting board 6
  • a first polarizer (upper polarizer) is fixed on the flip unit 5, and the first polarizer is located above the product to be tested;
  • the backlight module mounting board 6 is fixed with a backlight, and the back
  • a second polarizer (lower polarizer) is fixed on the light source, and the second polarizer is located below the product to be tested.
  • the backlight is used to form a stable light source, and the light source is irradiated onto the product to be tested through a hollow groove on the working stage 3.
  • the inverting unit 5 includes a rotating frame 51, a hinge 52 and a fixing plate 53.
  • One side of the rotating frame 51 is mounted on the working stage 3 through the hinge 52, and the flipping function is realized by the hinge 52 to achieve quick installation and For the purpose of maintenance; further, a card slot for accommodating the first polarizer is disposed on the inner side of the rotating frame 51, and the fixing plate 53 clamps the first polarizer to the rotating frame 51 through the double-layer glass plate, that is, the first After being sandwiched by the double-layer transparent glass plate, the polarizer is attached to the card slot on the rotating frame 51 through the fixing plate 53.
  • This method of sandwiching a polarizer between two layers of white glass completely avoids the risk of scratching the polarizer.
  • the backlight module mounting board 6 and the working stage 3 are detachably connected, and the two are matched in a split mode, which not only facilitates the cleaning of the backlight module, but also keeps the upper surface of the backlight module and the product to be tested at the closest distance, thereby achieving The best detection results.
  • the detachable connection can be provided in various manners.
  • the backlight module mounting plate 6 is provided with a first positioning post 11
  • the working loading platform 3 is provided with a mounting hole 31 .
  • the first positioning post 11 is located at the mounting hole 31 .
  • the working stage 3 and the backlight module mounting board 6 are connected by a magnetic member 32, and are mutually positioned by the magnetic force of the magnet.
  • it can be further optimized to use the positioning post together with the magnetic component 32 for more precise positioning and installation.
  • the work stage 3 A plurality of fourth positioning posts 14 are disposed on the plurality of fourth positioning posts 14 to complete the limiting function of the product to be tested.
  • the fourth positioning post 14 may preferably be a resin material based on the protection of the product to be tested.
  • a lateral adjustment plate 7, a longitudinal adjustment plate 8, and a bottom plate 9 are provided in this order from the top to the bottom of the backlight module mounting plate 6.
  • the work stage 3 is adjusted in the X direction by the lateral adjustment plate 7, and the work stage 3 is adjusted in the Y direction by the longitudinal adjustment plate 8. The adjustment is convenient and the detection efficiency is improved.
  • the lateral adjustment plate 7 is provided with a mounting groove 72 for driving the circuit board, and the circuit board for driving the backlight can be installed in the groove.
  • the backlight module mounting plate 6 and the lateral adjustment plate 7 may also be connected by a positioning post and a magnetic member.
  • the lateral adjustment plate 7 is movable in the X direction, that is, in the lateral direction (left and right direction) of the inclined surface;
  • the longitudinal adjustment plate 8 is located below the lateral adjustment plate 7, and is movable in the Y direction, that is, in the longitudinal direction of the inclined surface (front and rear direction) movement; bottom
  • the plate 9 is fixed on an inclined surface.
  • the lateral adjustment plate 7 is provided with a transverse groove 71 (parallel to the X direction), and the longitudinal adjustment plate 8 is provided with a second positioning post 12, and the second positioning post 12 can be assembled in the transverse groove 71, and only needs to be used when The transverse groove 71 is slidable along the second positioning post 12; correspondingly, the longitudinal adjustment plate 8 is provided with a longitudinal groove 81 (parallel to the Y direction), and the bottom plate 9 is provided with a third positioning post 13 , and the third positioning post 13 can be It is assembled in the longitudinal groove 81, and it is only necessary to slide the longitudinal groove 81 along the third positioning post 13 in use.
  • the adjustment of the alignment movement between the lateral adjustment plate 7 and the longitudinal adjustment plate 8 is not limited to a specific form, and the corresponding movement mode can be designed according to actual needs.
  • the alignment adjustment can also be carried out by means of a slider or a slide rail; or a pulley or a slide rail can be used.
  • the crimping mechanism 4 includes a driving unit and a ram 41; the driving unit drives the ram 41 to move in the Z direction, that is, perpendicular to the inclined surface. The direction is moved; one end of the indenter 41 is provided with a protrusion 411, and a plurality of probes 412 are bored on the protrusion 411.
  • the indenter 41 adopts a partial convex design of the probe 412.
  • the probe 412 is electrically connected to the signal source 2, that is, the probe mounting board is mated with the corresponding circuit board of the test signal; meanwhile, the other end of the probe 412 is in contact with the test point connected to the product to be tested during testing.
  • the probe 412 is preferably a double-ended retractable type, and the double-ended retractable probe 412 is matched with a spring sleeve to achieve a contraction effect at both ends of the needle body, so as to have a certain cushioning effect when it comes into contact with the product. The product will not be damaged due to excessive pressure.
  • the drive unit can be manual or electric.
  • the drive unit includes a frame 42, a rotating handle 43, an eccentric block 44, a support plate 45, and an elastic member 46.
  • the frame 42 is located on an inclined surface, and a guide shaft 47 is provided in the frame 42, and the guide shaft 47 is provided.
  • the elastic member 46 and the support plate 45 are sleeved on the guide shaft 47, and the elastic member 46 is located below the support plate 45.
  • the elastic member 46 may be a spring for the purpose of cost control.
  • the plate 45 is restored; the ram 41 is fixedly coupled to one side of the support plate 45 and reciprocates along with the support plate 45; the eccentric block 44 is located above the support plate 45; and the rotary handle 43 is used to drive the eccentric block 44 to be pressed
  • the support plate 45 is moved; thus the support plate 45 is moved in the axial direction of the guide shaft 47 by the eccentric block 44.
  • a control button is also connected to the signal source 2. 21, the control button 21 is used to control the test signal sent by the switching signal source.
  • the signal source 2 is fixed to the inside of the base 1 through the signal source mounting plate 22; the control button 21 is located on the side plate of the base 1 for the purpose of convenient operation.
  • the indenter 41 and the signal source 2 are connected by a multi-needle cable (for example, a 16-pin cable structure), and the test signal is transmitted to the respective probes 412 on the indenter 41; the backlight is given to be tested.
  • the product provides a stable light source, and upper and lower polarizers are respectively disposed on the flip unit 5 and the backlight for detecting different colors of the product; the signal source 2 and the control button 21 are passed through another cable structure (for example, 2 The needle cable is connected, and the contact of the probe 412 with the product to be tested is completed by pressing the rotary handle 43 to illuminate the product for detection.
  • test fixture provided by the invention can effectively complete the lighting test of the product to be tested, and integrates the base, the signal source, the work stage and the crimping mechanism to facilitate management and maintenance;
  • An inclined surface carrying the working stage and the crimping mechanism is further provided to have a better detection angle of view, thereby facilitating operation and production.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Nonlinear Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • General Engineering & Computer Science (AREA)
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  • Liquid Crystal (AREA)

Abstract

一种测试治具，包括底座（1）、信号源（2）、工作载台（3）和压接机构（4）；所述底座（1）上设有承载工作载台（3）、压接机构（4）的倾斜面，所述信号源（2）位于底座（1）上，所述压接机构（4）用于将测试信号施加在待测产品上以对其进行点灯测试。该测试治具通过一体化设计方便管理和维护，且其倾斜面设计具有较佳检测视角，有利于操作与生产。

Description

测试治具 技术领域
本发明涉及显示技术领域，尤其涉及一种测试治具，更加具体的是一种具有较佳的检测视角，且方便安装与维修的测试治具。
背景技术
目前，LCD(英文名称为Liquid Crystal Display，中文名称为液晶显示器)由于其技术的优势，已经广泛应用于生产生活中。在LCD的生产工艺中，常常需要使用一种辅助工具配合测试信号机完成LCD的测试。该辅助工具可为LCD与测试信号机之间提供信号连接，并将信号源的测试点连接在待测产品对应的测试点上，在点灯状态下完成对待测产品的检坝。
现有测试治具在应用时存在诸多缺陷：首先，治具本身与信号源为分体设置，使用时两者必须通过外接排线进行连接。这样在操作现场就会导致整体设备摆放杂乱，不利于车间操作与统一管理；而且，一般情况下，治具在进行信号测试时只在水平面上进行操作，不能提供较好的检测视角，不利于快速生产；其次，治具上的偏光片一般采用亚克力板直接贴附在载台的表面，这样不仅导致偏光片的透光率较低，而且还容易造成严重的划伤，大大增加了更换频率及漏检率；同时，治具载台与背光模块通常集成于一体，即，背光模块直接固定在载台后面的背光模块槽中，这样不便于背光模块的清洁与维修；此外，治具压头上的探针安装端无避让，在压头做往复运动时会导致非测试点处出现破损现象，造成不必要的损害。
因此，针对以上不足，需要一种可有效对待测产品进行点灯测试，便于一体化操作，具有较佳的检测视角，且方便安装与维修的测试治具。
发明内容
本发明要解决的技术问题是提供了一种测试治具，可有效对待测产品进行点灯测试，便于一体化操作，具有较佳的检测视角，且方便安装与维修。
为了解决上述技术问题，本发明提供一种测试治具，其包括底座、信号源、工作载台和压接机构；所述底座上设有承载所述工作载台、压接机构的倾斜面；所述信号源位于底座上；所述压接机构用于将信号源发出的测试信号施加于待测产品上；所述工作载台对所述待测产品进行点灯测 试。
根据本发明的一个方面，在所述工作载台的上方设有翻转单元，所述翻转单元的一侧与工作载台转动连接；在所述工作载台的下方设有背光模块安装板，所述背光模块安装板与工作载台可拆卸连接；所述待测产品设置在工作载台上且位于翻转单元与背光模块安装板之间；所述翻转单元上固定有第一偏光片；所述背光模块安装板上固定有背光源，所述背光源上固定有第二偏光片。
根据本发明的一个方面，所述翻转单元包括转动框、合页和固定板，所述转动框的一侧通过合页安装于工作载台上；所述固定板将第一偏光片通过双层玻璃板夹固在转动框上。
根据本发明的一个方面，所述背光模块安装板上设有第一定位柱，所述工作载台上设有安装孔，所述第一定位柱位于安装孔内。
根据本发明的一个方面，所述工作载台与背光模块安装板之间通过磁性部件连接。
根据本发明的一个方面，所述工作载台上设有用于限位所述待测产品的第四定位柱。
根据本发明的一个方面，在所述背光模块安装板的下方自上而下依次设有横向调节板、纵向调节板和底板；所述横向调节板上设有用于驱动所述背光源的电路板的安装槽；所述底板固定在所述倾斜面上，所述纵向调节板沿Y方向移动，所述横向调节板沿X方向移动。
根据本发明的一个方面，所述横向调节板上设有横向槽，所述纵向调节板上设有第二定位柱，所述第二定位柱位于横向槽中；所述纵向调节板上设有纵向槽，所述底板上设有第三定位柱，所述第三定位柱位于纵向槽中。
根据本发明的一个方面，所述压接机构包括驱动单元和压头；所述驱动单元驱动所述压头沿Z方向移动；所述压头的一端设有凸起，在凸起上穿设有多个探针；所述探针的一端与信号源电连接，另一端与所述待测产品的测试点接触连接。
根据本发明的一个方面，所述驱动单元包括框架、旋转把手、偏心块、支承板和弹性部件；所述框架位于倾斜面上，在框架内设有导向轴；所述弹性部件、支承板均套设于导向轴上，且弹性部件位于支承板的下方；所述压头固定连接于支承板的一侧；所述偏心块位于支承板的上方；所述旋 转把手驱动所述偏心块压合在所述支承板上；所述支承板在偏心块的作用下沿所述导向轴的轴向移动。
根据本发明的一个方面，所述信号源上连接有控制按键，所述控制按键用于切换所述信号源发出的测试信号。
根据本发明的一个方面，所述信号源通过信号源安装板固定于所述底座的内部；所述控制按键位于底座的侧板上。
根据本发明的一个方面，所述倾斜面与水平面之间的夹角为40°-50°。
本发明的上述技术方案具有以下有益效果：本发明提供的测试治具可有效地完成对待测产品的点灯测试，通过将底座、信号源、工作载台和压接机构一体化设计，方便管理与维护；而且，在底座上还设有承载所述工作载台、压接机构的倾斜面，使其具有较佳的检测视角，从而利于操作与生产。
附图说明
图1为本发明实施例测试治具的立体示意图；
图2为本发明实施例压头的结构示意图；
图3为本发明实施例压头的侧视图；
图4为本发明实施例工作载台的结构示意图；
图5为本发明实施例背光模块安装板的结构示意图；
图6为本发明实施例横向调节板的结构示意图；
图7为本发明实施例纵向调节板的结构示意图；
图8为本发明实施例底板装配后的示意图；
图9为本发明实施例翻转单元的结构示意图；
图10为本发明实施例底座的结构示意图；
图11为本发明实施例信号源安装板的结构示意图；
图12为本发明实施例底座的侧视图；
图13为本发明实施例压接机构的结构示意图。
其中，1：底座；2：信号源；3：工作载台；4：压接机构；5：翻转单元；6：背光模块安装板；7：横向调节板；8：纵向调节板；9：底板；11：第一定位柱；12：第二定位柱；13：第三定位柱；14：第四定位柱；21：控制按键；22：信号源安装板；31：安装孔；32：磁性部件；33：定位槽；41：压头；42：框架；43：旋转把手；44：偏心块；45：支承板；46：弹性部件；47：导向轴；51：转动框；52：合页；53：固定板；71： 横向槽；72：驱动电路板安装槽；81：纵向槽；411：凸起；412：探针。
具体实施方式
下面结合附图和实施例对本发明的实施方式作进一步详细描述。以下实施例用于说明本发明，但不能用来限制本发明的范围。
在本发明的描述中，除非另有说明，“多个”的含义是两个或两个以上；术语“上”、“下”、“左”、“右”、“内”、“外”、“前端”、“后端”、“头部”、“尾部”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“第一”、“第二”、“第三”等仅用于描述目的，而不能理解为指示或暗示相对重要性。
此外，在本发明的描述中，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明中的具体含义。
如图1所示，本实施例提供的测试治具包括底座1、信号源2、工作载台3和压接机构4；在底座1上设有承载工作载台3、压接机构4的倾斜面，该倾斜面与水平的夹角可根据需要灵活调整，例如：夹角可以为40°-50°，以45°为最优选择，其目的是为工作人员提供最佳的检测视角。而且，通过将信号源2设置在底座1上，通过信号源2就可直接形成检测待测产品的测试信号，方便一体化操作与管理；此外，压接机构4与工作载台3的一侧对应设置，用于将信号源2发出的测试信号施加于待测产品上；同时，利用工作载台3可在待测产品连接信号后对其进行点灯测试。该测试治具实现整体设备的一体化操作，具有较佳的检测视角，方便安装与维修。
为了模拟点灯状态，结合图1、图4、图5及图9所示，在工作载台3的上方设有翻转单元5，翻转单元5的一侧与工作载台3转动连接；在工作载台3的下方设有背光模块安装板6，背光模块安装板6与工作载台3之间为可拆卸连接；待测产品设置在工作载台3上且位于翻转单元5与背光模块安装板6之间，翻转单元5上固定有第一偏光片(上偏光片)，第一偏光片位于待测产品的上方；背光模块安装板6上固定有背光源，背 光源上固定有第二偏光片(下偏光片)，第二偏光片位于待测产品的下方。通过背光源以形成稳定的光源，光源通过工作载台3上的中空槽照射在待测产品上。
具体的，翻转单元5包括转动框51、合页52和固定板53，转动框51的一侧通过合页52安装于工作载台3上，利用合页52实现了翻转作用，达到快速安装与维修的目的；而且，在转动框51的内侧还设有用于容纳第一偏光片的卡槽，固定板53将第一偏光片通过双层玻璃板夹固在转动框51上，即：第一偏光片在被双层透明的玻璃板夹住后，通过固定板53安装于转动框51上的卡槽中。这种采用两层白玻璃中间夹设偏光片的方式，可完全避免偏光片出现划伤的风险。
背光模块安装板6与工作载台3之间为可拆卸连接，两者采用分体模式进行配合，不仅方便背光模块清洁，而且还可使背光模块上表面与待测产品保持最近距离，从而达到最佳的检测效果。当然，这种可拆卸连接的方式可以有多种，例如：背光模块安装板6上设有第一定位柱11，工作载台3上设有安装孔31，第一定位柱11位于安装孔31内；或者，工作载台3与背光模块安装板6之间通过磁性部件32连接，利用磁铁的磁力作用相互定位。当然也可以进一步优化，将定位柱与磁性部件32一起配合使用，从而达到更精准地定位与安装。
由于待测产品在点灯测试时是位于工作载台3上的，因此，在工作载台3上还需要有对待测产品进行准确定位的器件，以其中一种优选方式进行说明：工作载台3上设有多个第四定位柱14，多个第四定位柱14之间配合，完成对待测产品的限位作用。基于对待测产品的保护，第四定位柱14可以优选为树脂材料。
结合图1、图6、图7及图8所示，在背光模块安装板6的下方自上而下还依次设有横向调节板7、纵向调节板8和底板9。通过横向调节板7实现工作载台3在X方向对位调节，通过纵向调节板8实现工作载台3在Y方向对位调节。其调节方便、利于提高检测效率。
其中，在横向调节板7上设有驱动电路板的安装槽72，可将驱动背光源的电路板安装在槽内。而且，背光模块安装板6与横向调节板7之间也可通过定位柱、磁性部件连接。同时，横向调节板7可沿X方向移动，即，沿倾斜面的横向(左右方向)移动；纵向调节板8位于横向调节板7的下方，可沿Y方向移动，即，沿倾斜面的纵向(前后方向)移动；底 板9则固定在倾斜面上。
其中，横向调节板7上设有横向槽71(平行于X方向)，纵向调节板8上设有第二定位柱12，第二定位柱12可装配于横向槽71中，使用时只需将横向槽71沿第二定位柱12滑动即可；相应地，纵向调节板8上设有纵向槽81(平行于Y方向)，底板9上设有第三定位柱13，第三定位柱13可装配于纵向槽81中，使用时只需将纵向槽81沿第三定位柱13滑动即可。
值得说明的是，横向调节板7与纵向调节板8之间的对位移动调节并不局限于某种特定的形式，其可以根据实际需要设计相应地移动方式。对位调节时除了上述这种滑槽、定位柱的方式之外；也可以通过滑块、滑轨的方式；还可以采用滑轮、滑道的方式。
对于压接机构4而言，结合图2、图3及图13所示，压接机构4包括驱动单元和压头41；驱动单元驱动压头41沿Z方向移动，即，垂直于倾斜面的方向移动；压头41的一端设有凸起411，在凸起411上穿设有多个探针412。压头41采用探针412部分凸出设计，检测产品时只有探针412与测试点的直接接触，压头41其它部分不会接触的产品表面，从根本上避免了待测产品出现破损、压裂的现象。
探针412的一端与信号源2电连接，即，探针安装板和测试信号对应的电路板配合连接；同时，探针412的另一端在测试时接触连接于待测产品的测试点。探针412优选为双头可收缩式，双头可收缩式探针412利用中间套筒和弹簧配合，使针体两头实现可收缩作用，使其在与产品接触时，具有一定的缓冲作用，不会因压力过大导致产品破损。
而且，驱动单元可以为手动式，也可以为电动式。以其中一种方式进行说明：驱动单元包括框架42、旋转把手43、偏心块44、支承板45和弹性部件46；框架42位于倾斜面上，在框架42内设有导向轴47，导向轴47垂直于倾斜面；弹性部件46、支承板45均套设于导向轴47上，且弹性部件46位于支承板45的下方，基于成本的考虑，弹性部件46可以为弹簧，其作用是为了使支承板45进行复原作用；压头41固定连接于支承板45的一侧，可随支承板45一起往复运动；偏心块44位于支承板45的上方；旋转把手43用于驱动偏心块44压合在支承板45上；从而支承板45在偏心块44的作用下沿导向轴47的轴向移动。
此外，结合图10、图11、图12所示，信号源2上还连接有控制按键 21，控制按键21用于控制切换信号源发出的测试信号。信号源2通过信号源安装板22固定于底座1的内部；控制按键21位于底座1的侧板上，达到方便操作的目的。
具体的，将压头41与信号源2通过多针排线(例如16针排线结构)进行连接，并将测试信号传递给压头41上的各个探针412上面；通过背光源给待测产品提供稳定的光源，而且在翻转单元5与背光源上分别设有上下偏光片，用于检测产品不同颜色的画面；将信号源2与控制按键21之间通过另一排线结构(例如2针排线)进行连接，通过下压旋转把手43完成探针412与待测产品的接触，点亮产品进行检测。
综上所述，本发明提供的测试治具可有效地完成对待测产品的点灯测试，通过将底座、信号源、工作载台和压接机构一体化设计，方便管理与维护；而且，在底座上还设有承载所述工作载台、压接机构的倾斜面，使其具有较佳的检测视角，从而利于操作与生产。
本发明的实施例是为了示例和描述起见而给出的，而并不是群举式的或者将本发明限于所发明的形式。很多修改和变化对于本领域的普通技术人员而言是显而易见的。选择和描述实施例是为了更好说明本发明的原理和实际应用，并且使本领域的普通技术人员能够理解本发明从而设计适于特定用途的带有各种修改的各种实施例。

Claims (13)

  1. 一种测试治具，其特征在于，包括底座、信号源、工作载台和压接机构；所述底座上设有承载所述工作载台、压接机构的倾斜面；所述信号源位于底座上；所述压接机构用于将信号源发出的测试信号施加于待测产品上；所述工作载台对所述待测产品进行点灯测试。
  2. 根据权利要求1所述的测试治具，其特征在于，在所述工作载台的上方设有翻转单元，所述翻转单元的一侧与工作载台转动连接；在所述工作载台的下方设有背光模块安装板，所述背光模块安装板与工作载台可拆卸连接；所述待测产品设置在工作载台上且位于翻转单元与背光模块安装板之间；所述翻转单元上固定有第一偏光片；所述背光模块安装板上固定有背光源，所述背光源上固定有第二偏光片。
  3. 根据权利要求2所述的测试治具，其特征在于，所述翻转单元包括转动框、合页和固定板，所述转动框的一侧通过合页安装于工作载台上；所述固定板将第一偏光片通过双层玻璃板夹固在转动框上。
  4. 根据权利要求2所述的测试治具，其特征在于，所述背光模块安装板上设有第一定位柱，所述工作载台上设有安装孔，所述第一定位柱位于安装孔内。
  5. 根据权利要求2所述的测试治具，其特征在于，所述工作载台与背光模块安装板之间通过磁性部件连接。
  6. 根据权利要求2所述的测试治具，其特征在于，所述工作载台上设有用于限位所述待测产品的第四定位柱。
  7. 根据权利要求2所述的测试治具，其特征在于，在所述背光模块安装板的下方自上而下依次设有横向调节板、纵向调节板和底板；所述横向调节板上设有用于驱动所述背光源的电路板的安装槽；所述底板固定在所述倾斜面上，所述纵向调节板沿Y方向移动，所述横向调节板沿X方向移动。
  8. 根据权利要求7所述的测试治具，其特征在于，所述横向调节板上设有横向槽，所述纵向调节板上设有第二定位柱，所述第二定位柱位于横向槽中；所述纵向调节板上设有纵向槽，所述底板上设有第三定位柱，所述第三定位柱位于纵向槽中。
  9. 根据权利要求1所述的测试治具，其特征在于，所述压接机构包 括驱动单元和压头；所述驱动单元驱动所述压头沿Z方向移动；所述压头的一端设有凸起，在凸起上穿设有多个探针；所述探针的一端与信号源电连接，另一端与所述待测产品的测试点接触连接。
  10. 根据权利要求9所述的测试治具，其特征在于，所述驱动单元包括框架、旋转把手、偏心块、支承板和弹性部件；所述框架位于倾斜面上，在框架内设有导向轴；所述弹性部件、支承板均套设于导向轴上，且弹性部件位于支承板的下方；所述压头固定连接于支承板的一侧；所述偏心块位于支承板的上方；所述旋转把手驱动所述偏心块压合在所述支承板上；所述支承板在偏心块的作用下沿所述导向轴的轴向移动。
  11. 根据权利要求1所述的测试治具，其特征在于，所述信号源上连接有控制按键，所述控制按键用于切换所述信号源发出的测试信号。
  12. 根据权利要求11所述的测试治具，其特征在于，所述信号源通过信号源安装板固定于所述底座的内部；所述控制按键位于底座的侧板上。
  13. 根据权利要求1所述的测试治具，其特征在于，所述倾斜面与水平面之间的夹角为40°-50°。
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