Jig for function test of circuit board

Abstract

The utility model discloses a jig for circuit board function test, which comprises a base, a plurality of test pins, at least two groups of circuit board fixing pieces and a plurality of support columns, the base is provided with a plurality of threaded holes, the test pins are fixed in the base in a penetrating manner, and the pin heads of the test pins extend out of the top of the base. At least one group of circuit board fixing pieces comprises two circuit board fixing pieces which are oppositely arranged, at least one group of circuit board fixing pieces comprises three circuit board fixing pieces which are arranged in a triangular shape, the circuit board fixing pieces are arranged on the base, the bottom of the supporting column is screwed in the threaded hole, the top of the supporting column is in a conical shape, and the bottom of the supporting column is fixedly connected with the base. And four threaded holes and two supporting columns are distributed in the test area of the enclosure wall of each group of circuit board fixing pieces. The tool provided by the utility model can be suitable for testing various types of circuit boards, can carry out function testing on a plurality of circuit boards at the same time, and improves the testing efficiency.

Description

Technical Field

[0001] The utility model relates to a jig for functional testing of a circuit board. Background Art

[0002] In the production process of circuit boards, in order to ensure that the functions of the circuit boards leaving the factory are consistent with the design, it is necessary to perform functional tests on the circuit boards before leaving the factory. Usually, a test fixture is used to test the circuit boards. The existing circuit board functional test fixtures have poor versatility. Basically, one fixture can only be used to test a specific model of circuit boards, and only one circuit board can be tested at the same time, so the test efficiency is low. In addition, the structure of the device used to fix the circuit board on the existing circuit board functional test fixture is relatively complicated, and it is not very convenient for operators to operate.

[0003] Therefore, it is necessary to develop a fixture with a simple structure, which can be applied to the testing of various types of circuit boards and improve the testing efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a jig for circuit board function testing to solve at least one of the above technical problems.

[0005] The utility model provides a fixture for circuit board function testing, comprising:

[0006] A base, wherein a plurality of threaded holes are provided on the base;

[0007] A plurality of test needles are inserted and fixed in the base and the needle tips of the test needles extend from the top of the base;

[0008] At least two groups of circuit board fixing members, at least one group of circuit board fixing members includes two circuit board fixing members arranged opposite to each other, at least one group of circuit board fixing members includes three circuit board fixing members arranged in a triangle, and the circuit board fixing members are arranged on a base; and

[0009] A plurality of support columns are provided, wherein the bottom of the support columns is screwed into the threaded holes, and the top of the support columns is cone-shaped. Four threaded holes and two support columns are distributed in the test area of ​​the wall surrounding each set of circuit board fixing parts.

[0010] The jig of the utility model, when it is necessary to test the function of the circuit board, the round hole on the circuit board is sleeved on the top of the support column, the support column supports the circuit board upward, and then the circuit board is installed on the base using the circuit board fixing piece, the test contact at the bottom of the circuit board contacts the test needle, and the function test of the circuit board can be completed through the test needle. The position of the round hole on some circuit boards may be different. Since the support column and the base are connected by threads, the support column can be screwed off the base, and then the support column can be screwed into the threaded hole matching the position of the round hole on the circuit board to be tested. Moreover, since the top of the support column is conical, it can be suitable for supporting round holes of various sizes on various circuit boards, and is suitable for positioning support of various circuit boards. In addition, the arrangement of the circuit board fixing pieces in at least two groups of circuit board fixing pieces is different, that is, some circuit board fixing pieces are arranged diagonally, and some are arranged in a triangle, so that it can be suitable for testing circuit boards of various sizes, and at least two circuit boards can be functionally tested at the same time, thereby improving the test efficiency. The jig of the utility model can be suitable for testing circuit boards of various models, and multiple circuit boards can be functionally tested at the same time, thereby improving the test efficiency.

[0011] Preferably, the circuit board fixing member comprises a seat body, a hinge seat, a clamping plate, a spring and a pressing member.

[0012] The seat body is arranged on the base, the bottom of the seat body is provided with a concave accommodating cavity, the hinge seat is accommodated in the accommodating cavity, and the side wall of the seat body is provided with a vertical groove communicating with the accommodating cavity.

[0013] A concave sliding cavity is provided on the side of the seat body, the sliding cavity is located above the accommodating cavity and is communicated with the accommodating cavity, and a bearing step is provided on the side of the seat body, the bearing step is located below the opening of the sliding cavity,

[0014] The clamping plate is accommodated in the sliding cavity, one end of the clamping plate can extend from the opening of the sliding cavity, one end of the spring is arranged on the other end of the clamping plate, the other end of the spring abuts against the inner wall of the sliding cavity, and a driving hole is arranged in the middle of the clamping plate.

[0015] One end of the pressing piece passes through the vertical slot and is hinged on the hinge seat. One end of the pressing piece is provided with a hook, which is hooked in the driving hole.

[0016] The clamping plate is then pressed against the support member to allow the clamping plate to retract into the sliding cavity, and the clamping plate is then released to allow the clamping plate to be moved back into the sliding cavity.

[0017] Preferably, the end surface of the end portion of the clamping plate that can extend from the opening of the sliding cavity is in an arc shape, and the area of ​​the upper end surface of the clamping plate is smaller than the area of ​​the lower end surface.

[0018] Therefore, when installing the circuit board, since the end of the clamping plate is in an arc shape, as long as the edge of the circuit board is pressed down, the edge of the circuit board can pass over the clamping plate along the end of the clamping plate, and then the end of the clamping plate is buckled on the edge of the top of the circuit board under the action of the spring to complete the fixation of the circuit board, thereby quickly completing the fixation of the circuit board.

[0019] Preferably, a pressing plate is provided at the other end of the pressing piece, and anti-slip stripes are provided on the pressing plate.

[0020] Therefore, after the circuit board test is completed, the tester only needs to press the pressing plate downward, and the snap-on plate will retract into the sliding cavity. At this time, the tested circuit board can be removed, and then the pressing plate is released. The end of the snap-on plate extends from the opening of the sliding cavity to wait for the next circuit test. The tester can remove the tested circuit board by pressing the pressing plate. The operation is very simple and convenient. In addition, the anti-slip stripes on the pressing plate can increase the friction when the tester presses the pressing plate to prevent the pressing plate from loosening when being pressed.

[0021] Preferably, the circuit board fixing member comprises a base, a hinged base, a connecting rod, a pressure rod and a swing rod.

[0022] The base is set on the pedestal.

[0023] The hinged base is arranged on the base, and a sliding arc surface is arranged on the hinged base.

[0024] One end of the connecting rod is hinged on the hinged base, and the other end is hinged on the first end of the pressure rod. The first end of the pressure rod abuts against the sliding arc surface.

[0025] The second end of the pressure rod is hinged to the first end of the swing rod, and the second end of the swing rod is hinged to the hinge base.

[0026] Therefore, when it is necessary to fix the circuit board, align the circular hole on the circuit board with the supporting column on the base, put down the circuit board, and the edge of the circuit board is held upward by the base and the supporting column. Then, the pressure rod is pressed down. Since the first end of the swing rod is hinged to the pressure rod and the second end is hinged to the hinged base, the free end of the swing rod will be pressed against the edge of the circuit board. At this time, the test contact at the bottom of the circuit board contacts the test needle, thereby completing the fixation of the circuit board. After the test is completed, lift the pressure rod upward. Since the first end of the swing rod is hinged to the pressure rod and the second end is hinged to the hinged base, the free end of the swing rod will be lifted, and the swing rod will be separated from the edge of the circuit board. At this time, the circuit board can be removed. The structure of the circuit board fixing is simple, and the tester can quickly complete the fixing and removal of the circuit board through the pressure rod. The operation is very convenient and fast.

[0027] Preferably, a pressing portion is provided on the swing rod, and the pressing portion is located above the base.

[0028] Therefore, the pressure rod is pressed down, and the pressing part on the swing rod presses against the edge of the circuit board, thereby completing the fixation of the circuit board. After the test is completed, the pressure rod is lifted upward, and the pressing part on the swing rod is separated from the edge of the circuit board. At this time, the circuit board can be removed. The swing rod can press and fix the circuit board with a smaller contact surface through the pressing part to avoid pressing on components on the circuit board.

[0029] Preferably, the pressing portion is made of rubber material.

[0030] Therefore, the pressing portion made of rubber can prevent the pressing portion from crushing the circuit board.

[0031] Preferably, the circuit board fixing member includes a mounting seat, a rotating portion, a swing rod and a limiting rod.

[0032] The mounting seat is arranged on the base, and an upwardly extending mounting wall is arranged on the mounting seat. The rotating part is arranged on the mounting wall and is rotatably connected with the mounting wall.

[0033] An arc-shaped hole is provided on the rotating part, the end of the limit rod is arranged on the mounting wall and the limit rod is inserted into the arc-shaped hole.

[0034] The end of the swing rod is arranged on the rotating part.

[0035] When the limiting rod is located at one end of the arc-shaped hole, the distance between the rotating part and the mounting seat is the smallest, and when the limiting rod is located at the other end of the arc-shaped hole, the distance between the rotating part and the mounting seat is the largest.

[0036] Therefore, when it is necessary to fix the circuit board, align the circular hole on the circuit board with the supporting column on the base, put down the circuit board, and the edge of the circuit board is held upward by the mounting seat and the supporting column. Then, the swing rod is pulled, and the swing rod drives the rotating part to rotate on the mounting wall. When the rotating part rotates to the point where the limit rod is located at one end of the arc hole, the distance between the rotating part and the mounting seat is the smallest. At this time, the rotating part is pressed against the edge of the circuit board, and the test contacts at the bottom of the circuit board contact the test pins, thereby completing the fixation of the circuit board. After the test is completed, the swing rod is pulled in the opposite direction, and the swing rod drives the rotating part to rotate on the mounting wall. When the rotating part rotates to the point where the limit rod is located at the other end of the arc hole, the distance between the rotating part and the mounting seat is the largest, and the rotating part is separated from the edge of the circuit board. At this time, the circuit board can be removed. The structure of the circuit board fixing is simple, and the tester can quickly fix and remove the circuit board through the swing rod. The operation is very convenient and fast.

[0037] Preferably, the rotating part is provided with a planar part.

[0038] When the distance between the rotating portion and the mounting seat is the smallest, the planar portion and the mounting seat are arranged in parallel.

[0039] Therefore, when the rotating part rotates to the minimum distance from the mounting seat, the planar part on the rotating part presses against the edge of the circuit board, and the planar part ensures that the rotating part can press against the edge of the circuit board smoothly to complete the fixation of the circuit board.

[0040] Preferably, it also includes a wiring terminal and a control switch, both of which are arranged on the base, and the wiring terminal is electrically connected to the test pin through the control switch.

[0041] Therefore, the wiring terminal is externally connected to a test device to perform a functional test on the circuit board on the base, and the control switch can control the opening and closing of the test circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a schematic structural diagram of a fixture for circuit board function testing according to an embodiment of the utility model;

[0043] Figure 2 for Figure 1 An enlarged schematic diagram of the structure at A in the fixture shown;

[0044] Figure 3 for Figure 2 A schematic structural diagram of a base body in a circuit board fixing member shown;

[0045] Figure 4 for Figure 2 A schematic diagram of the structure of the hinge seat in the circuit board fixing member shown;

[0046] Figure 5 for Figure 2A schematic diagram of the structure of a pressing member in a circuit board fixing member shown;

[0047] Figure 6 for Figure 2 A schematic diagram of the structure of the clamping plate and the spring in the circuit board fixing member shown;

[0048] Figure 7 for Figure 2 A schematic cross-sectional view of a circuit board fixing member shown;

[0049] Figure 8 This is a structural schematic diagram of a fixture for circuit board function testing according to another embodiment of the present invention;

[0050] Fig. 9 for Figure 8 An enlarged structural schematic diagram of location B in the fixture shown;

[0051] Fig.10 for Fig. 9 A side view of the circuit board fixture shown;

[0052] Fig.11 This is a structural schematic diagram of a fixture for circuit board function testing according to another embodiment of the present utility model;

[0053] Fig.12 for Fig.11 An enlarged schematic diagram of the structure at location C in the fixture is shown. DETAILED DESCRIPTION

[0054] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0055] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0056] Embodiment 1: |

[0057] Figures 1 to 7 The structure of a fixture for circuit board function testing according to an embodiment of the utility model is schematically shown.

[0058] See also Figures 1 to 7 The fixture for circuit board functional testing includes a base 1, a test needle 2, a circuit board fixing part, a support column 4, a wiring terminal 7 and a control switch 8.

[0059] See also Figures 2 to 7 In this embodiment, the circuit board fixing member includes a seat body 31, a hinge seat 32, a clamping plate 33, a spring 34 and a pressing member 35.

[0060] See also Figure 2 , both sides of the seat body 31 are fixed to the base 1 by screws; Figure 7 The bottom of the seat body 31 is formed with a concave receiving cavity 311; Figure 1 The side wall of the seat body 31 is formed with a vertical groove 312 connected to the accommodating cavity 311; Figure 3 A concave sliding cavity 313 is formed on the side of the seat body 31, and the sliding cavity 313 is located above the accommodating cavity 311 and communicated with the accommodating cavity 311. A bearing step 314 is formed on the side of the seat body 31, and the bearing step 314 is located below the opening of the sliding cavity 313.

[0061] See also Figure 4 and Figure 7 The hinge seat 32 is accommodated in the accommodation cavity 311, see Figure 4 Two longitudinally arranged side panels 321 are formed on the hinge seat 32 , a gap for accommodating the pressing member 35 is left between the two side panels 321 , and through grooves 322 are formed at the same position on the tops of the two side panels 321 .

[0062] See also Figure 2 , Figure 3 and Figure 7 The clamping plate 33 is accommodated in the sliding cavity 313, and one end of the clamping plate 33 ( Figure 7 The left end of the snap-in plate 33 shown in FIG. 31 can extend from the opening of the sliding cavity 313; see Figure 6 One end of the spring 34 is fixed to the other end of the clamping plate 33 ( Figure 7 The other end of the spring 34 abuts against the inner wall of the sliding cavity 313, and a driving hole 331 is formed in the middle of the clamping plate 33.

[0063] See also Figure 5 The pressing member 35 is curved as a whole, and one end of the pressing member 35 ( Figure 7The left end of the pressing member 35 shown in the figure is respectively formed with coaxial convex columns 353 on both sides, and the end of the pressing member 35 is formed with a hook portion 351 extending upward. After the end of the pressing member 35 passes through the vertical groove 312 on the seat body 31, the two convex columns 353 on both sides of the end of the pressing member 35 are respectively accommodated in the two through grooves 322 on the hinge seat 32, and the middle position of the pressing member 35 is located between the two side plates 321 on the hinge seat 32. The hook portion 351 on the pressing member 35 passes through the connecting portion between the accommodating cavity 311 and the sliding cavity 313 and is hooked in the driving hole 331 on the clamping plate 33 located in the sliding cavity 313 ( Figure 7 The pressing member 35 is hinged to the hinge seat 32 through two bosses 353 at the end. Figure 2 and Figure 7 , press the other end of the pressing piece 35 downward, the pressing piece 35 rotates on the hinge seat 32, and the hook 351 on the pressing piece 35 can drive the clamping plate 33 to retract into the sliding cavity 313 on the seat body 31. When the other end of the pressing piece 35 is released, under the action of the restoring force of the spring 34, the end of the clamping plate 33 can extend from the opening of the sliding cavity 313. After the clamping plate 33 extends from the opening of the sliding cavity 313, it is located above the bearing step 314.

[0064] See also Figure 6 and Figure 7 The end face of the end of the clamping plate 33 extending from the opening of the sliding cavity 313 is in the shape of an arc, and the area of ​​the upper end face 3301 of the clamping plate 33 is smaller than the area of ​​the lower end face 3302. In this way, when installing the circuit board, just press the edge of the circuit board downward, and the edge of the circuit board can pass over the clamping plate 33 along the end of the clamping plate 33, and then the end of the clamping plate 33 is buckled on the edge of the top of the circuit board under the action of the spring 34 to complete the fixation of the circuit board, so that the fixation of the circuit board can be completed quickly, and the end of the clamping plate 33 in the shape of an arc can guide the edge of the circuit board to pass over the end of the clamping plate 33, so that the edge of the circuit board can quickly pass over the end of the clamping plate 33 of the circuit board fixing part.

[0065] See also Figure 2 , Figure 5 and Figure 7 , the other end of the pressing member 35 ( Figure 7A pressing plate 352 is formed on the right end of the pressing piece 35 shown in the figure, and an anti-slip stripe 3521 is formed on the upper end surface of the pressing plate 352; since the pressing piece 35 is hinged on the hinge seat 32 through two protrusions 353 at the end, as long as the pressing plate 352 is pressed downward, the clamping plate 33 will retract into the sliding cavity 313, and the pressing plate 352 is released, and the end of the clamping plate 33 extends out from the opening of the sliding cavity 313. The operation of the circuit board fixing part is very simple and convenient. The anti-slip stripe 3521 on the pressing plate 352 can increase the friction force when the tester presses the pressing plate 352, thereby preventing the pressing plate 352 from loosening when being pressed.

[0066] There are at least two groups of circuit board fixing members, at least one group of circuit board fixing members includes two circuit board fixing members arranged opposite to each other, and at least one group of circuit board fixing members includes three circuit board fixing members arranged in a triangle, see Figure 1 In this embodiment, there are three groups of circuit board fixing members. One group of circuit board fixing members includes two circuit board fixing members arranged opposite to each other. Two groups of circuit board fixing members respectively include three circuit board fixing members arranged in a triangle. The two circuit board fixing members arranged opposite to each other can be used to install and fix circuit boards with smaller sizes. The three circuit board fixing members arranged in a triangle can be used to install and fix circuit boards with larger sizes. Thus, the circuit boards with various sizes can be tested. Figure 1 , three sets of circuit board fixtures can perform functional tests on three circuit boards at the same time, improving test efficiency.

[0067] See also Figure 1 There are multiple test needles 2, which are inserted and fixed in the base 1 and the needles of the test needles 2 extend from the top of the base 1. A corresponding number of test needles 2 and positions that are adapted to the test points on the tested circuit board are distributed in the area surrounding the wall of each group of circuit board fixings.

[0068] See also Figure 1 , the wiring terminal 7 is installed on the base 1, the control switch 8 is installed on the base 1, the number of the control switches 8 is three, a control switch 8 is installed next to each group of circuit board fixtures, the wiring terminal 7 is connected to the test pin 2 through a harness, the three control switches 8 are respectively installed on the circuits of the test pins 2 in the three groups of circuit board fixtures, the wiring terminal 7 is externally connected to the test equipment to perform functional tests on the circuit boards on the base 1, and the three control switches 8 can independently control the on and off of the circuits of the test pins 2 in the three groups of circuit board fixtures.

[0069] See also Figure 1 and Figure 2, a plurality of threaded holes 11 are formed on the base 1, and the bottom of the support column 4 is screwed into the threaded hole 11. In this embodiment, four threaded holes 11 arranged in a square are arranged in the area of ​​the wall surrounding each group of circuit board fixing parts, and two support columns 4 are distributed in the area of ​​the wall surrounding each group of circuit board fixing parts. There are usually two round holes at the corners of the circuit board to be tested. When the function of the circuit board needs to be tested, the two round holes on the circuit board are put on the top of the two support columns 4, and the support column 4 can support the circuit board upward. The position of the round hole on some circuit boards may be different. Since the support column 4 is connected to the base 1 by a thread, the support column 4 can be unscrewed from the base 1, and then the support column 4 can be screwed into the threaded hole 11 matching the position of the round hole on the circuit board to be tested. In this way, it can be suitable for positioning support of various circuit boards. In addition, according to the size of the round hole on the circuit board to be tested, the support column 4 can be screwed to adjust the height of the support column 4.

[0070] See also Figure 1 and Figure 2 The top of the support column 4 is conical, so that the support column 4 can be suitable for supporting circular holes of various sizes on various circuit boards, thereby being suitable for positioning support of various circuit boards.

[0071] See also Figure 1When the circuit board needs to be tested, the round hole on the circuit board is aligned with the two supporting columns 4 in the wall area of ​​a certain group of circuit board fixing parts on the base 1, and then the circuit board is pressed downward, and the edge of the circuit board will move downward along the end of the clamping plate 33 of the circuit board fixing part, and at the same time, the edge of the circuit board will drive the clamping plate 33 to retract into the sliding cavity 313. When the edge of the circuit board passes over the clamping plate 33, under the action of the restoring force of the spring 34, the end of the clamping plate 33 extends out from the opening of the sliding cavity 313 to buckle on the edge of the circuit board. At this time, the bottom of the circuit board is supported by the supporting step 314 and the two supporting columns 4, and the edge of the top of the circuit board is buckled by the clamping plate 33. The test contacts at the bottom of the circuit board contact with the test pin 2, thereby completing the fixing of the circuit board. The functional test of the circuit board can be completed through the test pin 2. After the test is completed, the pressing plates 352 of each pressing member 35 are pressed downward respectively, and the pressing member 35 rotates on the hinge seat 32. The hook 351 on 5 drives the clamping plate 33 to retract into the sliding cavity 313. At this time, the circuit board that has been tested can be removed, and then the pressing plate 352 is released. Under the action of the restoring force of the spring 34, the end of the clamping plate 33 extends out from the opening of the sliding cavity 313 to wait for the test of the next circuit. The structure of the circuit board fixing piece is simple, and the tester can quickly fix and remove the circuit board. The operation is very convenient and fast. Since the top of the support column 4 is conical and detachably connected to the base 1, the support column 4 can be used to support circular holes of various sizes on various circuit boards, and is suitable for positioning and supporting various circuit boards. In addition, the three sets of circuit board fixing pieces can be used to test circuit boards of various sizes, and can also perform functional tests on three circuit boards at the same time, thereby improving the test efficiency. The fixture of the utility model can be used to test circuit boards of various models, and can also perform functional tests on multiple circuit boards at the same time, thereby improving the test efficiency.

[0072] Embodiment 2:

[0073] Figures 8 to 10 The structure of a fixture for circuit board functional testing according to another embodiment of the utility model is schematically shown.

[0074] See also Figures 8 to 10 The fixture for circuit board functional testing includes a base 1, a test needle 2, a circuit board fixing part, a support column 4, a wiring terminal 7 and a control switch 8.

[0075] Compared with the first embodiment, only the structure of the circuit board fixing parts of this embodiment is different from that of the first embodiment. The number of groups and arrangement of the circuit board fixing parts, the test pins 2, the support columns 4, the wiring terminals 7, and the control switches 8 are the same as those of the first embodiment and will not be repeated here.

[0076] See also Fig. 9 and Fig.10The circuit board fixing member includes a base 51, a hinged base 52, a connecting rod 53, a pressure rod 54 and a swing rod 55.

[0077] See also Fig. 9 and Fig.10 The base 51 is fixed on the base 1, and the hinged base 52 is fixed on the base 51. The hinged base 52 is formed by two identical plates arranged in parallel and connected by bolts. A gap is left between the two plates. A sliding arc surface 521 is formed on the hinged base 52, that is, a sliding arc surface 524 is formed at the same position on the two plates. One end of the connecting rod 53 ( Fig.10 The lower end of the connecting rod 53 shown in FIG. 1 is inserted between the two plates of the hinged base 52, and the end of the connecting rod 53 is hinged between the two plates on the hinged base 52 through a rotating shaft, see FIG. Fig. 9 The right end of the pressure rod 54 is formed by two U-shaped card plates, see Fig.10 , the other end of the connecting rod 53 ( Fig.10 The upper end of the connecting rod 53 shown in the figure is inserted between the two clamping plates of the pressure rod 54 and is hinged to the first end 541 of the pressure rod 54 through a rotating shaft. The first end 541 of the pressure rod 54 is in the shape of an arc surface. The first end 541 of the pressure rod 54 abuts against the sliding arc surface 521 on the hinge base 52, that is, the edges of the two clamping plates of the pressure rod 54 respectively abut against the two sliding arc surfaces 524 on the two plate bodies of the hinge base 52. The first end 551 of the swing rod 55 is inserted between the two clamping plates of the pressure rod 54 and is hinged to the second end 542 of the pressure rod 54 through a rotating shaft. The second end 552 of the swing rod 55 is inserted between the two plate bodies of the hinge base 52 and is hinged to the hinge base 52 through a rotating shaft. A pressing portion 553 is installed on the swing rod 55, and the pressing portion 553 is located on the upper side of the base 51. The pressing portion 553 is made of rubber material. The swing rod 55 can press and fix the circuit board with a smaller contact surface through the pressing portion 553 to avoid pressing the components on the circuit board. The pressing portion 553 made of rubber can prevent the pressing portion 553 from damaging the circuit board. When the circuit board needs to be fixed, the round hole on the circuit board is aligned with the support column 4 on the base 1, and the circuit board is put down. The edge of the circuit board is supported upward by the base 51 and the support column 4, and then the pressure rod 54 is pressed down. Since the first end 551 of the swing rod 55 is hinged to the second end 542 of the pressure rod 54, the second end 552 of the swing rod 55 is hinged to the hinge base 52, and the first end 541 of the pressure rod 54 is hinged to the hinge base 52 through the connecting rod 53, the pressing portion 553 on the swing rod 55 will press on the edge of the circuit board ( Fig. 9 , Fig.10The circuit board fixing part is simple in structure. The test personnel can quickly fix and remove the circuit board through the pressure rod 54. The operation is very convenient and fast. When the pressure rod 54 is lifted and pressed down, the first end 541 of the pressure rod 54 slides along the sliding arc surface 521 on the hinged base 52, thereby ensuring that the pressure rod 54 can be lifted or pressed down smoothly.

[0078] See also Figure 8 When the circuit board needs to be tested, align the round hole on the circuit board with the two support columns 4 in the wall area of ​​a group of circuit board fixing parts on the base 1. At this time, the pressure rod 54 is in a raised state, and the circuit board is put down. The edge of the circuit board is supported upward by the base 51 and the support column 4, and then each pressure rod 54 is pressed down. The pressing part 553 on each swing rod 55 will press on the edge of the circuit board, and the test contact at the bottom of the circuit board will contact the test needle 2. At this time, the circuit board is fixed, and the functional test of the circuit board can be completed through the test needle 2. After the test is completed, each pressure rod 54 is lifted up, and the pressing part 553 on the swing rod 55 is separated from the edge of the circuit board. At this time, the circuit board can be removed and wait for the next For circuit testing, the circuit board fixing part has a simple structure, and the tester can quickly fix and remove the circuit board by operating the pressure rod 54. The operation is very convenient and fast. Since the top of the support column 4 is conical and detachably connected to the base 1, the support column 4 can be used to support circular holes of various sizes on various circuit boards, and is suitable for positioning support of various circuit boards. In addition, the three groups of circuit board fixing parts can be used to test circuit boards of various sizes, and can perform functional tests on three circuit boards at the same time, thereby improving the test efficiency. The fixture of the utility model can be used to test various types of circuit boards, and can perform functional tests on multiple circuit boards at the same time, thereby improving the test efficiency.

[0079] Embodiment three:

[0080] Fig.11 and Fig.12 The structure of a fixture for circuit board functional testing according to another embodiment of the present invention is schematically shown.

[0081] See also Fig.11 and Fig.12The fixture for circuit board functional testing includes a base 1, a test needle 2, a circuit board fixing part, a support column 4, a wiring terminal 7 and a control switch 8.

[0082] Compared with the first embodiment, only the structure of the circuit board fixing parts of this embodiment is different from that of the first embodiment. The number of groups and arrangement of the circuit board fixing parts, the test pins 2, the support columns 4, the wiring terminals 7, and the control switches 8 are the same as those of the first embodiment and will not be repeated here.

[0083] See also Fig.11 and Fig.12 The circuit board fixing member includes a mounting seat 61 , a rotating portion 62 , a swing rod 63 and a limiting rod 64 .

[0084] See also Fig.12 , the mounting seat 61 is fixed on the base 1, and an upwardly extending mounting wall 611 is formed on the mounting seat 61. The mounting seat 61 is L-shaped as a whole, and the longitudinal section of the rotating part 62 is approximately circular in shape as a whole. The rotating part 62 is mounted on the mounting wall 611 through a rotating shaft 623. The rotating part 62 can be mounted on the wall 611 through the rotating shaft 623. A limiting cap is installed at the end of the rotating shaft 623 to prevent the rotating part 62 from loosening. An arc-shaped hole 621 is formed on the rotating part 62, and the end of the limiting rod 64 is fixed on the mounting wall 611. The limiting rod 64 is inserted in the arc-shaped hole 621. The limiting rod 64 and the rotating shaft 623 are respectively located on both sides of the center position of the rotating part 62, and the end of the swing rod 63 is fixed on the rotating part 62. When the limiting rod 64 is located at the upper end of the arc-shaped hole 621, the distance between the bottom of the rotating part 62 and the mounting seat 61 is the smallest. When the limiting rod 64 is located at the lower end of the arc-shaped hole 621 ( Fig.12 When the circuit board needs to be fixed, align the circular hole on the circuit board with the support column 4 on the base 1, put down the circuit board, and the edge of the circuit board is supported upward by the mounting seat 61 and the support column 4. Then, pull the swing rod 63, and the swing rod 63 drives the rotating part 62 to rotate on the mounting wall 611. When the rotating part 62 rotates to the upper end of the limit rod 64 located at the arc hole 621, the distance between the rotating part 62 and the mounting seat 61 is the smallest. At this time, the rotating part 62 is pressed against the edge of the circuit board, and the test contacts at the bottom of the circuit board are in contact with the test pin 2, thereby completing the fixation of the circuit board. After the test is completed, pull the swing rod 63 in the opposite direction, and the swing rod 63 drives the rotating part 62 to rotate on the mounting wall 611. When the rotating part 62 rotates to the lower end of the limit rod 64 located at the arc hole 621 ( Fig.12 In the state shown in the figure, the distance between the rotating part 62 and the mounting seat 61 is the largest, and the rotating part 62 is separated from the edge of the circuit board. At this time, the circuit board can be removed. The structure of the circuit board fixing part is simple. The tester can quickly fix and remove the circuit board through the swing rod 63. The operation is very convenient and fast.

[0085] See also Fig.12 A plane portion 622 is formed on the peripheral wall of the rotating portion 62. When the distance between the bottom of the rotating portion 62 and the mounting seat 61 is the smallest, the plane portion 622 is arranged parallel to the mounting seat 61. When the rotating portion 62 rotates to the smallest distance between the rotating portion 62 and the mounting seat 61, the plane portion 622 on the rotating portion 62 presses against the edge of the circuit board. The plane portion 622 ensures that the rotating portion 62 can be stably pressed against the edge of the circuit board to complete the fixation of the circuit board.

[0086] See also Fig.11 When the circuit board needs to be tested, align the round hole on the circuit board with the two support columns 4 in the wall area of ​​a group of circuit board fixing parts on the base 1. At this time, the limit rod 64 is located at the lower end of the arc hole 621, and the circuit board is put down. The edge of the circuit board is supported upward by the mounting seat 61 and the support column 4, and then each swing rod 63 is pulled. The flat portion 622 on each rotating portion 62 is pressed against the edge of the circuit board, and the test contact at the bottom of the circuit board contacts the test needle 2. At this time, the circuit board is fixed, and the functional test of the circuit board can be completed through the test needle 2. After the test is completed, each swing rod 63 is pulled in the opposite direction, and the flat portion 622 on each rotating portion 62 is separated from the edge of the circuit board. At this time, the circuit board can be removed. , waiting for the next circuit test, the circuit board fixing part has a simple structure, and the tester can quickly fix and remove the circuit board by pulling the swing rod 63. The operation is very convenient and fast. Since the top of the support column 4 is conical and detachably connected to the base 1, the support column 4 can be used to support circular holes of various sizes on various circuit boards, and is suitable for positioning support of various circuit boards. In addition, the three sets of circuit board fixing parts can be used to test circuit boards of various sizes, and can perform functional tests on three circuit boards at the same time, thereby improving the test efficiency. The fixture of the utility model can be used to test circuit boards of various models, and can perform functional tests on multiple circuit boards at the same time, thereby improving the test efficiency.

[0087] The above are only some embodiments of the present invention, which are intended to illustrate the technical means of the present invention, but not to limit the technical scope of the present invention. Those skilled in the art can make obvious improvements to the present invention in combination with existing common knowledge, which all fall within the protection scope of the present invention.

Claims

1. A fixture for circuit board functional testing, characterized in that: include: A base, wherein a plurality of threaded holes are provided on the base; A plurality of test needles, wherein the test needles are inserted and fixed in the base and the needle tips of the test needles extend from the top of the base; At least two groups of circuit board fixing members, at least one group of circuit board fixing members includes two circuit board fixing members arranged opposite to each other, at least one group of circuit board fixing members includes three circuit board fixing members arranged in a triangle, and the circuit board fixing members are arranged on a base; and A plurality of support columns, the bottom of each support column is screwed into a threaded hole, the top of each support column is conical, and four threaded holes and two support columns are distributed in the test area of ​​the wall surrounding each set of circuit board fixing parts.

2. The fixture according to claim 1, characterized in that: The circuit board fixing member includes a seat body, a hinge seat, a clamping plate, a spring and a pressing member. The seat body is arranged on the base, the bottom of the seat body is provided with a concave accommodating cavity, the hinge seat is accommodated in the accommodating cavity, and the side wall of the seat body is provided with a vertical groove communicating with the accommodating cavity. The side of the seat body is provided with a concave sliding cavity, the sliding cavity is located above the accommodating cavity and is communicated with the accommodating cavity, and the side of the seat body is provided with a bearing step, the bearing step is located below the opening of the sliding cavity, The clamping plate is accommodated in the sliding cavity, one end of the clamping plate can extend from the opening of the sliding cavity, one end of the spring is arranged on the other end of the clamping plate, the other end of the spring abuts against the inner wall of the sliding cavity, and a driving hole is arranged in the middle of the clamping plate. One end of the pressing piece passes through the vertical slot and is hinged on the hinge seat. One end of the pressing piece is provided with a hook, which is hooked in the driving hole.

3. The fixture according to claim 2, characterized in that: The end surface of the end of the clamping plate that can extend from the opening of the sliding cavity is in an arc shape, and the area of ​​the upper end surface of the clamping plate is smaller than the area of ​​the lower end surface.

4. The fixture according to claim 2, characterized in that: A pressing plate is provided at the other end of the pressing piece, and anti-slip stripes are provided on the pressing plate.

5. The fixture according to claim 1, characterized in that: The circuit board fixing member includes a base, a hinged base, a connecting rod, a pressure rod and a swing rod. The base is arranged on the pedestal. The hinged base is arranged on the base, and a sliding arc surface is arranged on the hinged base. One end of the connecting rod is hinged on the hinge base, and the other end is hinged on the first end of the pressure rod, and the first end of the pressure rod is against the sliding arc surface. The second end of the pressure rod is hinged to the first end of the swing rod, and the second end of the swing rod is hinged to the hinge base.

6. The fixture according to claim 5, characterized in that: The swing rod is provided with a pressing portion, and the pressing portion is located above the base.

7. The fixture according to claim 6, characterized in that: The pressing part is made of rubber material.

8. The fixture according to claim 1, characterized in that: The circuit board fixing member includes a mounting seat, a rotating part, a swing rod and a limit rod. The mounting seat is arranged on the base, and an upwardly extending mounting wall is arranged on the mounting seat. The rotating part is arranged on the mounting wall and is rotatably connected with the mounting wall. The rotating part is provided with an arc-shaped hole, the end of the limiting rod is arranged on the mounting wall and the limiting rod is inserted into the arc-shaped hole. The end of the swing rod is arranged on the rotating part. When the limiting rod is located at one end of the arc-shaped hole, the distance between the rotating part and the mounting seat is the smallest, and when the limiting rod is located at the other end of the arc-shaped hole, the distance between the rotating part and the mounting seat is the largest.

9. The fixture according to claim 8, characterized in that: The rotating part is provided with a flat surface part. When the distance between the rotating portion and the mounting seat is the smallest, the planar portion and the mounting seat are arranged in parallel.

10. The jig according to any one of claims 1 to 9, characterized in that: It also includes a wiring terminal and a control switch, both of which are arranged on the base, and the wiring terminal is electrically connected to the test pin through the control switch.

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