Automatic test fixture

Abstract

The utility model discloses an automatic test fixture, which comprises an upper frame and a lower frame, an installation space is arranged between the upper frame and the lower frame, the upper frame can rotate relative to the lower frame so as to open the installation space, a test module is arranged on the upper frame, and a carrier plate module is arranged on the lower frame; the test module comprises a lifting cylinder arranged on the upper frame, the output end of the lifting cylinder is provided with a lifting plate, and the lifting plate is provided with a first test module, a second test module, a code scanner and a plurality of elastic pressing rods; the carrier plate module comprises a carrier plate capable of moving to the outside of the mounting space, and the carrier plate is provided with a plurality of positioning pins, a plurality of check blocks and a plurality of inductive switches. According to the application, a drawer-type structure carrier plate automatic in-out one-button starting mode is adopted, the operation is simple, rapid and safe, and the test efficiency and the test precision are greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit board test technical field, concretely is a kind of automated test fixture. BACKGROUND

[0002] Circuit board such as mainboard needs to be tested before factory, to ensure its product yield, traditional test generally adopts manual one by one docking mainboard corresponding port by artificial hand and running program on simple test fixture to carry out product test, and this operation mode is inefficient, and one worker can only test product to be tested one by one by simple tool manually.In addition, the method of testing by artificial and simple tool combination cannot guarantee the yield of product testing, thereby affecting the quality of mainboard product factory. UTILITY MODEL CONTENT

[0003] To solve the deficiency of prior art, the present application provides an automated test fixture, comprising an upper frame and a lower frame, the upper frame and the lower frame have a mounting space, and the upper frame is rotatably arranged relative to the lower frame to open the mounting space, a test module is arranged on the upper frame, and a carrier plate module is arranged on the lower frame.

[0004] The test module comprises a lifting cylinder arranged on the upper frame, and a lifting plate is arranged at the output end of the lifting cylinder, the lifting plate is provided with a first test module, a second test module, a code scanner and a plurality of elastic pressing rods.

[0005] The carrier plate module comprises a carrier plate movable to the outside of the mounting space, a plurality of positioning pins, a plurality of stop blocks and a plurality of inductive switches are arranged on the carrier plate.

[0006] Further, the first test module comprises a test cylinder, and the test cylinder is horizontally arranged and provided with a plurality of test plugs at the output end.

[0007] Further, the second test module comprises a fixed block, a rotating block is rotatably arranged at the lower end of the fixed block through a pin shaft, a clamping groove is arranged at the bottom of the rotating block, a plug-in test card is arranged in the clamping groove, a spring needle is arranged on the fixed block, and the spring needle abuts against the upper end surface of the rotating block.

[0008] Further, an adjusting screw is arranged on the fixed block, and the bottom end of the adjusting screw can abut against the rotating block.

[0009] Further, the test module further comprises a left plug-in module arranged on one side of the carrier plate, the left plug-in module comprises a left push cylinder, and a power connector and a plurality of probes are arranged at the output end of the left push cylinder.

[0010] Further, the test module further comprises a right-side plug-in module arranged on the other side of the carrier plate, the right-side plug-in module comprising a right-side push air cylinder, and an output end of the right-side push air cylinder being provided with a test network card and a USB conversion plate module.

[0011] Further, a plurality of guide columns and a plurality of positioning columns are arranged on the lifting plate, the plurality of guide columns penetrating through the upper frame, and the carrier plate being provided with a plurality of positioning sleeves corresponding to the positioning columns.

[0012] Further, a push-out air cylinder and a slide rail are arranged on the lower frame, the carrier plate being arranged on the slide rail and connected to an output end of the push-out air cylinder.

[0013] Further, two groups of mounting plates parallel to the slide rail are arranged below the carrier plate, and a plurality of eye-shaped bearings are arranged on the mounting plates at intervals for guiding the movement of the carrier plate.

[0014] Further, the upper frame and the lower frame are connected through nitrogen gas springs.

[0015] The automatic test fixture provided by the application has the following beneficial effects:

[0016] (1) The carrier plate is automatically in and out in a drawer type structure, which is simple and fast to operate, greatly improving the test efficiency and test precision;

[0017] (2) The carrier plate module part is an openable structure, which is convenient for repairing and maintaining the internal structure;

[0018] (3) The carrier plate is pre-pressed and positioned through the elastic pressing rod, the guide column and the positioning column, which is convenient for subsequent test actions. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is an embodiment structure schematic diagram of the automatic test fixture of the application;

[0020] Figure 2 It is a schematic diagram of the carrier plate module structure in the embodiment; Figure 1

[0021] It is a schematic diagram of the mounting plate and eye-shaped bearing structure in the embodiment; Figure 3 Figure 2 It is a schematic diagram of the test module structure in the embodiment;

[0022] Figure 4 Figure 1 It is another perspective structure schematic diagram in the embodiment;

[0023] Figure 5 It is another perspective structure schematic diagram in the embodiment; Figure 4

[0024] Figure 6 It is another perspective structure schematic diagram in the embodiment; Figure 5 ​​​The first test module structure schematic diagram;

[0025] Figure 7 For Figure 5 The second test module structure schematic diagram;

[0026] Figure 8 For Figure 7 Another perspective structure schematic diagram;

[0027] Figure 9 For Figure 2 The left side plug-in module structure schematic diagram;

[0028] Figure 10 For Figure 2 The right side plug-in module structure schematic diagram;

[0029] Figure 11 For Figure 1 The upper frame and lower frame structure schematic diagram;

[0030] Figure 12 For Figure 11 The upper frame structure schematic diagram;

[0031] Figure 13 For Figure 11 The upper frame and lower frame connection schematic diagram.

[0032] The figure is marked as: 10, the upper frame, 101, the hinge, 102, the hidden handle, 103, the wire slot, 104, the cooling fan, 105, the foolproof support rod, 106, the luggage buckle, 107, the rotating rod, 108, the maintenance handle, 11, the lower frame, 111, the cooling hole, 12, the nitrogen spring, 13, the support plate, 14, the fence plate, 15, the safety grating;

[0033] 20, the carrier plate module, 21, the push-out air cylinder, 22, the slide rail, 23, the carrier plate, 24, the positioning pin, 25, the stop block, 26, the inductive switch, 27, the positioning sleeve, 28, the mounting plate, 29, the bull's eye bearing;

[0034] 30, the test module, 31, the lifting air cylinder, 32, the lifting plate, 33, the first test module, 331, the test air cylinder, 332, the test plug, 34, the second test module, 341, the fixed block, 342, the pin shaft, 343, the rotating block, 344, the plug-in test card, 345, the spring needle, 346, the adjusting screw, 347, the limiting block, 35, the left side plug-in module, 351, the left side plug-in air cylinder, 352, the left side push plate, 353, the power connector, 354, the probe, 36, the right side plug-in module, 361, the right side plug-in air cylinder, 362, the right side push plate, 363, the accompanying test network card, 364, the USB conversion plate module, 37, the guide column, 38, the positioning column. DETAILED DESCRIPTION

[0035] In order to better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the present application.

[0036] It should be noted that the terms "first", "second", and the like in the specification of the present application, the claims, and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products, or devices.

[0037] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0038] In addition, in addition to indicating the orientation or positional relationship, the above-mentioned part of the terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the present application can be understood according to the specific circumstances.

[0039] In addition, the terms "mount", "set", "provided with", "connected", "connected", "sleeved" should be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally constructed; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0040] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0041] Referring to Figures 1-13 The present embodiment provides an automatic test fixture, which is divided into an upper, middle and lower three-layer structure, the upper layer structure includes an upper frame 10, the lower layer structure includes a lower frame 11, and the space between the upper frame 10 and the lower frame 11 is the middle layer structure, the middle layer structure is provided with a carrier plate module 20 and a test module 30, and the upper frame 10 and the lower frame 11 are connected by nitrogen springs 12 to realize opening the middle layer space for maintenance.

[0042] Referring to Figure 2 Specifically, the carrier plate module 20 includes a push-out air cylinder 21 and a sliding rail 22 arranged on the top wall of the lower frame 11, the sliding rail 22 is provided with a carrier plate 23 for placing the circuit board to be tested, the output end of the push-out air cylinder 21 is connected to the carrier plate 23 for pushing the carrier plate out of the fixture, two groups of mounting plates 28 parallel to the sliding rail are arranged below the carrier plate 23, a plurality of bullseye bearings 29 are arranged on the mounting plates 28 in intervals for guiding the movement of the carrier plate.

[0043] Preferably, a plurality of positioning pins 24 are arranged on the carrier plate 23, the number and position of the positioning pins 24 are determined according to the shape and structure of the board to be tested, a plurality of stop blocks 25 are arranged circumferentially along the edge position of the carrier plate 23 for limiting the board to be tested, and two groups of sensing switches 26 are further arranged on the carrier plate in order to detect whether the board to be tested is placed on the carrier plate and whether it is placed in place.

[0044] Specifically, the test module 30 includes a lifting air cylinder 31 arranged on the bottom wall of the upper frame 10, the output end of the lifting air cylinder 31 is provided with a lifting plate 32, the lifting plate 32 is provided with a first test module 33, a second test module 34, a code scanner 35 and a plurality of elastic pressing rods 36, the elastic pressing rods 36 are pre-pressed on the board to be tested by driving the lifting plate 32 to descend through the lifting air cylinder 31, and then the board to be tested is tested through the first test module 33 and the second test module 34, and then scanned and identified through the code scanner 35.

[0045] A plurality of guide columns 37 and a plurality of positioning columns 38 are arranged on the lifting plate 32, the plurality of guide columns 37 penetrate through the bottom wall of the upper frame, a plurality of positioning sleeves 27 corresponding to the positioning columns 38 are arranged on the carrier plate 23, and after the lifting plate descends, the positioning columns 38 can be inserted into the positioning sleeves 27.

[0046] Referring to Figure 6The first test module 33 comprises a test cylinder 331 horizontally arranged and provided with a plurality of test plugs 332 at the output end, the test plugs 332 being 4in1 interposer cards for plugging test of the interfaces on the test board.

[0047] Referring to Figures 7-8 The second test module 34 comprises a fixed block 341 fixedly connected with the lifting plate 32, the fixed block 341 being rotatably provided with a rotating block 343 at the lower end through a pin shaft 342, the rotating block 343 being provided with a clamping groove at the bottom, a plugging test card 344 being arranged in the clamping groove, the plugging test card 344 being a BSM card, and two groups of spring pincers 345 being arranged on the fixed block and abutting against the upper end face of the rotating block 343.

[0048] In order to adjust the rotating angle of the rotating block 343, two groups of adjusting screws 346 are arranged through the fixed block 341, the rotating block 343 is provided with a limiting block 347, the bottom end of the adjusting screw 346 can abut against the upper end face of the limiting block 347, and the rotating angle of the rotating block is adjusted through the limiting block 347 by adjusting the height of the adjusting screw 346.

[0049] After the lifting plate 32 is lowered, when the BSM card contacts the test interface, the force is transmitted to the spring pincers 345 through the rotating block, the spring pincers are extended to drive the rotating plate to rotate downward, the BSM card is inserted into the test interface in a downward inclined manner, the insertion action is completed, the pulling-out action is completed by the lifting plate, the spring pincers are reset, and the plugging test is realized.

[0050] Referring to Figures 9-10 The test module 30 further comprises a left-side plug-in module 35 and a right-side plug-in module 36 arranged at the left and right sides of the carrier plate, the left-side plug-in module 35 comprising a left-side push cylinder 351, the output end of the left-side push cylinder 351 being provided with a left-side push plate 352, the left-side push plate 352 being provided with a power connector 353 and a plurality of probes 354, and the right-side plug-in module 36 comprising a right-side push cylinder 361, the output end of the right-side push cylinder 361 being provided with a right-side push plate 362, the right-side push plate 362 being provided with a test network card 363 and a USB conversion plate module 364.

[0051] The main function of the left-side plug-in module 35 is to supply power and transmit the model of the to-be-tested board, and the main function of the right-side plug-in module 36 is to plug in the test network card and convert the USB interface of the to-be-tested board, the USB conversion plate module 364 being a flexible module with a certain self-adaptive tolerance, so that the USB conversion plate module 364 can be inserted into the interface of the to-be-tested board even if there is a position deviation, the USB conversion plate can improve the service life and reduce the use cost, and the USB conversion plate module is designed as a quick-release structure to facilitate subsequent replacement and maintenance.

[0052] Referring to Figures 11-13The upper frame 10 is a rectangular structure as a whole, which is composed of four side walls, a top wall and a bottom wall, so that the inside has a closed installation space, wherein the top wall is connected with the side walls through hinges 101, and a hidden handle 102 is arranged on the top wall to facilitate opening of the upper frame.

[0053] The electric control part for placing the whole test fixture is arranged in the upper frame 10, which is arranged above for maintenance, and mainly composed of some electric control elements such as PLC, IO expansion module and electromagnetic valve, so that a wire groove 103 is arranged circumferentially along the connection between the bottom wall and the side wall of the upper frame for fixing the wire harness of the elements, and two groups of cooling fans 104 are arranged on the opposite side walls respectively for cooling the inside of the upper frame.

[0054] Since the top wall of the upper frame is in an open state when the inside of the upper frame is maintained by personnel, a foolproof support rod 105 is further arranged between the top wall and the bottom wall of the upper frame for supporting the top wall after it is opened, so as to ensure the personal safety of the operator, and the box buckle 106 is arranged for locking after the top wall is closed.

[0055] The lower frame 11 has basically the same structure as the upper frame, and is slightly larger in size than the upper frame. The top wall of the lower frame can also be opened, and nitrogen springs and a box buckle are arranged between the top wall and the side wall of the lower frame to play a protection role. The inside of the lower frame is mainly used for placing the test board and power supply, and some switches, start buttons and emergency stop buttons are arranged on the side wall. Wire grooves are also arranged circumferentially along the connection between the bottom wall and the side wall of the lower frame, and a plurality of cooling holes 111 are formed in the two side walls of the lower frame.

[0056] A plurality of support plates 13 are arranged on the lower frame 11 in intervals. A rotating rod 107 is arranged on the bottom wall of the upper frame 10 along the length direction, and the rotating rod 107 is rotatably connected with the plurality of support plates 13. Nitrogen springs 12 are arranged between the top wall of the lower frame and the bottom wall of the upper frame. Maintenance handles 108 are also arranged on the side wall of the upper frame 10 for lifting or lowering the whole upper frame.

[0057] A surrounding plate 14 is arranged circumferentially between the top wall of the lower frame and the bottom wall of the upper frame for surrounding the middle layer structure. One side of the surrounding plate 14 is open for the test board to enter and exit. Safety gratings 15 are arranged on both sides of the opening of the surrounding plate 14 to prevent the operator from being pinched or other dangerous operations.

[0058] Before testing, the carrier plate is pushed out by the push-out cylinder, then the plate to be tested is placed, the start button is pressed, the carrier plate enters, the lifting cylinder drives the first test module and the second test module to descend, the left plug-in module and the right plug-in module are inserted into position, then the testing is started, after the testing is completed, the test module resets, the carrier plate is pushed out, the plate to be tested is taken out, and the cycle is repeated.

[0059] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An automated test fixture comprising an upper frame and a lower frame, said upper frame having a mounting space with said lower frame, and said upper frame being rotatably disposed relative to said lower frame such that said mounting space is opened, characterized by: The upper frame is provided with a test module, and the lower frame is provided with a carrier plate module; The test module comprises a lifting cylinder arranged on the upper frame, an output end of the lifting cylinder is provided with a lifting plate, the lifting plate is provided with a first test module, a second test module, a code scanner and a plurality of elastic pressing rods; The carrier plate module comprises a carrier plate which is movable to the outside of the installation space, the carrier plate is provided with a plurality of positioning pins, a plurality of stop blocks and a plurality of inductive switches.

2. The automated test fixture of claim 1, wherein: The first test module comprises a test cylinder, the test cylinder is horizontally arranged and provided with a plurality of test plugs at the output end.

3. The automated test fixture of claim 1, wherein: The second test module comprises a fixed block, a rotating block is rotatably arranged at the lower end of the fixed block through a pin shaft, a clamping groove is arranged at the bottom of the rotating block, a plug-in test card is arranged in the clamping groove, a spring needle is arranged on the fixed block, and the spring needle abuts against the upper end surface of the rotating block.

4. The automated test fixture of claim 3, wherein: An adjusting screw is arranged on the fixed block, and the bottom end of the adjusting screw can abut against the rotating block.

5. The automated test fixture of claim 1, wherein: The test module further comprises a left plug-in module arranged on one side of the carrier plate, the left plug-in module comprises a left push cylinder, and the output end of the left push cylinder is provided with a power connector and a plurality of probes.

6. The automated test fixture of claim 5, wherein: The test module further comprises a right plug-in module arranged on the other side of the carrier plate, the right plug-in module comprises a right push cylinder, and the output end of the right push cylinder is provided with a test network card and a USB conversion plate module.

7. The automated test fixture of claim 1, wherein: A plurality of guide columns and a plurality of positioning columns are arranged on the lifting plate, a plurality of guide columns penetrate through the upper frame, and a plurality of positioning sleeves corresponding to the positioning columns are arranged on the carrier plate.

8. The automated test fixture of claim 1, wherein: A push-out cylinder and a slide rail are arranged on the lower frame, the carrier plate is arranged on the slide rail and connected to the output end of the push-out cylinder.

9. The automated test fixture of claim 8, wherein: Two groups of installation plates parallel to the slide rail are arranged below the carrier plate, a plurality of bull's eye bearings are arranged on the installation plates at intervals.

10. The automated test fixture of claim 1, wherein: The upper frame and the lower frame are connected through nitrogen springs.

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