Multi-board power-on test device and method based on FPC production

Abstract

The invention discloses a multi-board power-on test device and method based on FPC production, and relates to the technical field of FPC production detection equipment, the multi-board power-on test device comprises an aging furnace material rack arranged in an aging furnace and a plurality of material boards arranged on the aging furnace material rack, the material boards are provided with a plurality of circuit boards, the plurality of circuit boards are electrically connected with the aging furnace through electric signals, and the plurality of circuit boards are electrically connected with the aging furnace through electric signals. An elastic clamping mechanism is arranged between the material plate and the circuit board and is used for clamping the circuit board; the elastic clamping mechanism comprises a plurality of pairs of clamping rods, a plurality of pairs of clamping plates, a plurality of elastic telescopic air bags and a driving mechanism. By arranging the elastic clamping mechanism and controlling expansion and contraction of an elastic telescopic air bag, self-adaptive adjustment of elastic force is achieved, it is ensured that the FPC is stably clamped all the time in the high-temperature deformation process, and the problem caused by too large existing rigid clamping force is solved; and a plurality of FPCs can be clamped at the same time, that is, each pair of clamping rods corresponds to one FPC, the requirement for synchronous testing of multiple boards is met, and the testing efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of FPC production detection equipment, and particularly relates to a multi-board power-on testing device and method based on FPC production. BACKGROUND

[0002] In the high-temperature power-on test of FPC, i.e., flexible printed circuit board, in an aging oven, due to the material properties of FPC itself, the test environment, and the technical requirements of the power-on test, the multi-board power-on testing device for FPC production still has the following defects in the process of use: For example, the Chinese patent with the publication number CN114755566A discloses a three-dimensional transfer type circuit board aging test machine, which comprises a test box, the front end of the test box is hingedly connected with a box door made of transparent glass, the test box is provided with a heating device for heating the circuit board at a adjustable temperature and a cooling device for rapid cooling of the circuit board, the test box is provided with a clamping and overturning device and a strength testing device; the present application can perform aging test on circuit boards of different specifications, and the clamping unit can clamp and fix circuit boards of different specifications by moving and controlling the overturning disc through the spacing adjusting mechanism and the first hydraulic cylinder, and the present application can overturn multiple circuit boards in the test box at the same time to make the circuit boards evenly heated and improve the accuracy of the circuit board aging test.

[0003] When the circuit board is subjected to aging test, a clamp is usually used to fix the flexible printed circuit board to ensure stable connection. However, the above-mentioned circuit board aging test device adopts a rigid clamping mode, which is not suitable for FPC; since the substrate and copper foil of FPC are relatively thin, the material strength of FPC will significantly decrease under high-temperature conditions; if the clamping force is too large, it is easy to cause tearing of the edge of FPC or falling of the solder pad from the substrate; and if the clamping force is too small, it cannot effectively resist the impact of high-temperature air flow or the displacement caused by its own deformation. Therefore, the rigid clamping mode cannot effectively ensure the clamping stability of FPC in high-temperature aging test. SUMMARY

[0004] The present application aims to provide a multi-board power-on testing device and method based on FPC production, which can effectively solve the problems raised in the background art.

[0005] To achieve the above object, the present application provides the following technical scheme: a multi-board power-on testing device based on FPC production, comprising an aging furnace rack arranged in an aging furnace and a plurality of material plates arranged on the aging furnace rack, a plurality of circuit boards are arranged on the material plates, the plurality of circuit boards are electrically connected to the aging furnace through electrical signals, an elastic clamping mechanism is arranged between the material plate and the circuit board and is used for clamping the circuit board, the elastic clamping mechanism comprises a plurality of pairs of clamping rods, a plurality of pairs of clamping plates, a plurality of elastic expansion air bags and a driving mechanism, wherein a notch is formed in each pair of clamping rods, and the two sides of the circuit board are arranged in the clamping rod through the notch, a pair of clamping plates is slidably connected in the notch of each clamping rod and is used for clamping the circuit board, the elastic expansion air bag is arranged in the clamping rod and is used for driving the clamping plate to move to provide clamping force on the circuit board, and the driving mechanism is installed in the clamping rod and is used for driving the elastic expansion air bag to expand or compress to adjust the clamping force of the notch on the circuit board.

[0006] Preferably, the clamping rod is provided with a connecting pipe and an expansion bellows, one end of the connecting pipe is connected with the elastic expansion air bag, the other end of the connecting pipe is connected with the expansion bellows, the elastic expansion air bag is connected with the clamping plate through the connecting pipe and the expansion bellows, when the elastic expansion air bag is expanded under stress, the positive pressure in the elastic expansion air bag is transmitted to the expansion bellows through the connecting pipe, so that the expansion bellows is elongated under stress, and then drives the clamping plate to move to enhance the clamping force on the circuit board.

[0007] Preferably, the driving mechanism comprises a gear, a push block, a limiting mechanism and a pair of racks, the gear is rotatably connected to the clamping rod about its axis, a pair of the racks are slidably connected to the clamping rod along the expansion direction of the elastic expansion air bag, and a pair of the racks are respectively engaged on the two sides of the gear, the push block is slidably connected to the clamping rod, and the push block is fixedly arranged on one of the racks, and the limiting mechanism is arranged on the clamping rod and is used for limiting the expansion and compression state of the elastic expansion air bag.

[0008] Preferably, the limiting mechanism comprises a pawl and a second reset spring, the pawl is rotatably connected to the clamping rod through a rotating shaft, a ratchet groove matched with the pawl is formed in one of the racks, the first reset spring is arranged on the pawl, when the pawl loses the limitation, the first reset spring is used for driving the pawl to rotate, so that the pawl is restored to engage with the ratchet groove, and the second reset spring is arranged between the clamping rod and the push block.

[0009] Preferably, a floating three-dimensional platform is arranged between the material plate and the elastic clamping mechanism; the floating three-dimensional platform comprises an X-direction sliding layer, a Y-direction sliding layer and a Z-direction floating layer; the X-direction sliding layer is installed on the material plate and is used to provide micro-floating in the X direction when the circuit board deforms; the Y-direction sliding layer is installed on the X-direction sliding layer and is used to provide micro-floating in the Y direction when the circuit board deforms; the Z-direction floating layer is installed between the Y-direction sliding layer and the clamping rod and is used to provide micro-floating in the Z direction when the circuit board deforms.

[0010] Preferably, the X-direction sliding layer comprises a first base, a first sliding rail, a first sliding block and a third reset spring; the first sliding rail is arranged on the material plate; the first sliding block is fixedly arranged at the bottom of the first base; the first base is slidably connected to the first sliding rail through the first sliding block; the third reset spring is arranged between the first sliding block and the material plate; when the first base loses the restriction, the third reset spring is used to drive the first base to move and reset.

[0011] Preferably, the Y-direction sliding layer comprises a second base, a second sliding rail, a second sliding block and a fourth reset spring; the second sliding rail is arranged on the first base; the second sliding block is fixedly arranged at the bottom of the second base; the second base is slidably connected to the second sliding rail through the second sliding block; the fourth reset spring is arranged between the second sliding block and the second base; when the second base loses the restriction, the fourth reset spring is used to drive the second base to move and reset.

[0012] Preferably, the Z-direction floating layer comprises a spherical hinge and a plurality of limiting shafts; the spherical hinge is arranged between the second base and the clamping rod; the spherical hinge comprises a spherical head and a housing; the housing is fixedly arranged on the first base; one end of the spherical head is connected to the housing; the other end of the spherical head is fixedly arranged on the clamping rod; the plurality of limiting shafts are fixedly arranged on the housing; one end of the plurality of limiting shafts extends downward and is connected to the second base; the other end of the plurality of limiting shafts extends upward and forms a convex part; the spherical head and the housing are connected in a clearance fit.

[0013] Preferably, a fifth reset spring is arranged between the convex part and the clamping rod; when the clamping rod loses the restriction, the fifth reset spring is used to drive the clamping rod to move so that the clamping rod is kept in a horizontal reset state.

[0014] A multi-board power-on test method based on FPC production, which adopts the multi-board power-on test device based on FPC production; specifically comprising the following steps: Step one, elastic clamping: firstly, a pair of clamping plates on the clamping rods are used to preliminarily clamp the two sides of the circuit board, so as to preliminarily fix the circuit board in the spatial position; then, an elastic expansion air bag connected with the clamping plates is used to further realize elastic clamping of the circuit board; Step two, clamping adjustment: the expansion or contraction of the elastic expansion air bag is controlled by the driving mechanism; when the driving mechanism drives the elastic expansion air bag to expand, it will push the clamping plate connected thereto to move towards the circuit board; when the driving mechanism drives the elastic expansion air bag to contract, the clamping plate will move away from the circuit board, so as to adjust the clamping force of the clamping plate on the circuit board.

[0015] In summary, the technical effects and advantages of the present application are: The present application has reasonable structure, by setting the elastic clamping mechanism, by controlling the expansion and contraction of the elastic expansion air bag, realizing the self-adaptive adjustment of elastic force, ensuring that the FPC is always stably clamped during high temperature deformation, solving the problem caused by the excessive rigid clamping force; and multiple FPCs can be clamped at the same time, that is, each pair of clamping rods corresponds to one FPC, which meets the demand of multiple board synchronous testing and improves the testing efficiency. In the present application, by setting the floating three-dimensional platform, multi-degree-of-freedom motion is realized by layering and stacking: when the FPC generates X, Y and Z displacement or inclination due to high temperature, it can drive each layer to move independently and cooperatively, and fully compensate the three-dimensional thermal deformation of the FPC; the mechanical stress generated by thermal expansion and contraction of the FPC is released; in cooperation with the elastic clamping mechanism, a double compensation mechanism of clamping and floating is formed, further improving the stability of FPC testing. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiment or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creating laborious work.

[0017] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the aging furnace rack in the present application. Figure 2 It is a schematic diagram of the local three-dimensional enlarged structure of the material plate in the present application. Figure 3 It is a schematic diagram of the three-dimensional enlarged structure of the elastic clamping mechanism and the floating three-dimensional platform in the present application. Figure 4 It is a schematic diagram of the local sectional three-dimensional enlarged structure of the elastic clamping mechanism and the floating three-dimensional platform in the present application. Figure 5 It is a schematic diagram of the local sectional three-dimensional enlarged structure of the elastic clamping mechanism and the floating three-dimensional platform in the present application. Figure 4 Figure 6 It is a schematic diagram of the three-dimensional enlarged structure of the elastic clamping mechanism in the present application. Figure 7 It is a schematic diagram of the three-dimensional enlarged structure of the elastic clamping mechanism in the present application. Figure 6 It is a schematic diagram of the three-dimensional enlarged structure of the elastic clamping mechanism in the present application.​Figure 8 Figure 3 is a schematic view of the stereoscopic enlarged structure of the floating three-dimensional platform of the present application; Figure 9 Figure 4 is a schematic view of the partially cut stereoscopic enlarged structure of the floating three-dimensional platform of the present application; Figure 10 Figure 5 is a schematic view of the enlarged structure of the middle C area of the present application; Figure 9 Figure 11 Figure 6 is a flow chart of the method of the present application.

[0018] In the figure: 1, aging furnace rack; 2, material plate; 3, circuit board; 4, elastic clamping mechanism; 41, clamping rod; 42, notch; 43, clamping plate; 44, elastic telescopic air bag; 45, connecting pipe; 46, telescopic bellows; 47, driving mechanism; 471, gear; 472, rack; 473, push block; 474, limiting mechanism; 4741, pawl; 4742, ratchet groove; 4743, second reset spring; 5, floating three-dimensional platform; 51, X direction sliding layer; 511, first sliding rail; 512, first sliding block; 513, third reset spring; 52, Y direction sliding layer; 521, second sliding rail; 522, second sliding block; 523, fourth reset spring; 53, Z direction floating layer; 531, spherical hinge; 5311, ball head; 5312, housing; 532, limiting shaft; 533, fifth reset spring. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0020] Embodiment 1: Please refer to Figures 1-6 ​The application discloses a multi-board power-on testing device based on FPC production, which comprises an aging furnace rack 1 arranged in an aging furnace and a plurality of material plates 2 arranged on the aging furnace rack 1, a plurality of circuit boards 3 are arranged on the material plates 2, the plurality of circuit boards 3 are electrically connected with the aging furnace through electric signals, an elastic clamping mechanism 4 is arranged between the material plates 2 and the circuit boards 3 and used for clamping the circuit boards 3, the elastic clamping mechanism 4 comprises a plurality of pairs of clamping rods 41, a plurality of pairs of clamping plates 43, a plurality of elastic telescopic air bags 44 and a driving mechanism 47, wherein a notch 42 is formed in each pair of clamping rods 41, and the two sides of the circuit board 3 are arranged on the clamping rod 41 through the notch 42; a pair of clamping plates 43 are slidably connected in the notch 42 of each clamping rod 41 and used for clamping the circuit board 3; the elastic telescopic air bag 44 is arranged on the clamping rod 41 and used for driving the clamping plate 43 to move so as to provide clamping force for the circuit board 3; it can be understood that each clamping plate 43 corresponds to an elastic telescopic air bag 44, and the elastic telescopic air bag 44 is used for driving a pair of clamping plates 43 to move relatively or oppositely; and the driving mechanism 47 is installed on the clamping rod 41 and used for driving the elastic telescopic air bag 44 to expand or contract so as to adjust the clamping force of the notch 42 on the circuit board 3.

[0021] It should be noted that the elastic telescopic air bag 44 is made of silicone rubber material and is a prior art, which will not be described in detail, the elastic telescopic air bag 44 is fixed in an inner cavity of the clamping rod 41, the telescopic end of the elastic telescopic air bag 44 is connected with the clamping plate 43 through a connecting rod, the elastic telescopic air bag 44 pushes the clamping plate 43 to move close to the FPC when expanding, and drives the clamping plate 43 to move away when contracting. The elastic telescopic air bag 44 realizes self-adaptive clamping through conversion of air pressure and mechanical force: when the elastic telescopic air bag 44 expands, the internal air pressure increases, and the clamping plate 43 is pushed to apply clamping force to the FPC; when the FPC expands due to high temperature, the reaction force of the FPC on the clamping plate 43 slightly compresses the elastic telescopic air bag 44, the clamping force is self-adaptively reduced with the deformation of the FPC, and excessive extrusion is avoided; when the FPC contracts, the elastic telescopic air bag 44 keeps a certain expansion amount under the action of the driving mechanism 47, so that the clamping is not loose; the elastic buffering mechanism is different from the fixed force output of the traditional rigid clamping, and realizes dynamic matching of the clamping force and the deformation of the FPC. Through self-adaptive adjustment of elastic force, the FPC is always stably clamped in the high-temperature deformation process, the problems that the FPC is torn and the solder pad is separated due to excessive rigid clamping force and the displacement problem due to insufficient force are solved; and a plurality of FPCs can be clamped at the same time, that is, each pair of clamping rods 41 corresponds to one FPC, the synchronous testing demand of multiple boards is met, and the testing efficiency is improved.

[0022] Please refer to Figures 1-4The clamping rod 41 is provided with a connecting pipe 45 and a telescopic bellows 46; one end of the connecting pipe 45 is connected with the elastic telescopic air bag 44, the other end of the connecting pipe 45 is connected with the telescopic bellows 46, and the elastic telescopic air bag 44 is connected with the clamping plate 43 through the connecting pipe 45 and the telescopic bellows 46; when the elastic telescopic air bag 44 is forced to expand, the positive pressure in the elastic telescopic air bag 44 is transmitted to the telescopic bellows 46 through the connecting pipe 45, so that the telescopic bellows 46 is forced to elongate, and then drives the clamping plate 43 to move to enhance the clamping force on the circuit board 3.

[0023] It should be noted that when the elastic telescopic air bag 44 expands, the internal positive pressure is transmitted to the telescopic bellows 46 through the connecting pipe 45, so that the telescopic bellows 46 elongates due to the increase of internal gas pressure, and then pushes the clamping plate 43 to move towards the FPC; on the contrary, when the elastic telescopic air bag 44 is compressed, the gas pressure in the telescopic bellows 46 decreases, and the telescopic bellows 46 shrinks under the action of the FPC reaction force or the driving mechanism 47, driving the clamping plate 43 to reset. The connecting pipe 45 ensures that the gas pressure is transmitted without loss, and the telescopic bellows 46 compensates for the displacement of the clamping plate 43 through its own deformation, realizing efficient conversion of gas pressure and mechanical displacement. Through the flexible transmission of the bellows, the direct rigid connection of the elastic telescopic air bag 44 and the clamping plate 43 is avoided, the stress concentration when the elastic telescopic air bag 44 expands is reduced, and the service life of the air bag is prolonged; at the same time, it ensures that the clamping force is uniformly transmitted to the clamping plate 43, and avoids the local stress of the FPC caused by uneven force transmission.

[0024] Please refer to Figures 1-4 The driving mechanism 47 includes a gear 471, a push block 473, a limiting mechanism 474, and a pair of racks 472; the gear 471 is rotatably connected to the clamping rod 41 about its axis, the pair of racks 472 are slidably connected to the clamping rod 41 along the telescopic direction of the elastic telescopic air bag 44, and the pair of racks 472 are respectively engaged on both sides of the gear 471, the push block 473 is slidably connected to the clamping rod 41, and the push block 473 is fixedly arranged on one of the racks 472; the limiting mechanism 474 is arranged on the clamping rod 41 and is used to limit the expansion and compression state of the elastic telescopic air bag 44.

[0025] It should be noted that the driving mechanism 47 realizes the reverse transmission of force through the meshing of the gear 471 and the rack 472: when the push block 473 is pushed to move, the rack 472 connected thereto drives the gear 471 to rotate clockwise, and the other rack 472 moves in the opposite direction, extruding the elastic expansion air bag 44 to make it compress, at this time the clamping force decreases; when the push block 473 is pulled in the opposite direction, the gear 471 rotates counterclockwise, and the other rack 472 retreats, and the elastic expansion air bag 44 expands under the action of its own elasticity, at this time the clamping force increases. This structure converts one-way driving into bidirectional force output, realizes accurate adjustment of the clamping force; the clamping force is adjusted by mechanical transmission, compared with pure pneumatic or electric adjustment, the structure is more compact, which is suitable for the high-temperature narrow space in the aging furnace; and the transmission precision of the gear 471 and the rack 472 is high, which can realize fine adjustment of the clamping force and meet the clamping needs of FPCs with different thicknesses.

[0026] Please refer to Figures 1-4 The limiting mechanism 474 includes a pawl 4741 and a second reset spring 4743; the pawl 4741 is rotatably connected to the clamping rod 41 through a rotating shaft, and one of the racks 472 is provided with a ratchet groove 4742 matched with the pawl 4741; the pawl 4741 is provided with a first reset spring; when the pawl 4741 loses the limit, the first reset spring is used to drive the pawl 4741 to rotate, so that the pawl 4741 restores the engagement with the ratchet groove 4742; the second reset spring 4743 is arranged between the clamping rod 41 and the push block 473.

[0027] It should be noted that the limiting mechanism 474 realizes one-way locking through the pawl 4741 and the ratchet groove 4742, and realizes the retention of the clamping force: when the push block 473 is pushed to adjust the clamping force, the rack 472 moves, the pawl 4741 is lifted against the elastic force of the first reset spring under the action of the inclined surface of the ratchet groove 4742, and the movement of the rack 472 is allowed; when the push block 473 is released, the pawl 4741 is embedded in the ratchet groove 4742 under the action of the first reset spring, preventing the rack 472 from moving in the opposite direction, thereby locking the current clamping force; if it is necessary to adjust in the opposite direction, the pawl 4741 needs to be manually pulled out of the ratchet groove 4742 at this time, and the second reset spring 4743 pushes the push block 473 to reset, thereby reducing the clamping force; the limiting mechanism 474 is provided to prevent the clamping force from changing accidentally due to vibration or micro-leakage of the elastic expansion air bag 44 during the test process, thereby ensuring the clamping stability; the operation is convenient, and the clamping force can be maintained without continuously applying external force, thereby reducing the cost of manual or automatic control.

[0028] Embodiment 2: The technical scheme of this embodiment is different from that of embodiment 1: please refer to Figures 1-4, and a floating three-dimensional platform 5 is arranged between the material plate 2 and the elastic clamping mechanism 4; the floating three-dimensional platform 5 comprises an X-direction sliding layer 51, a Y-direction sliding layer 52 and a Z-direction floating layer 53; the X-direction sliding layer 51 is installed on the material plate 2 and is used to provide micro-floating in the X direction when the circuit board 3 deforms; the Y-direction sliding layer 52 is installed on the X-direction sliding layer 51 and is used to provide micro-floating in the Y direction when the circuit board 3 deforms; and the Z-direction floating layer 53 is installed between the Y-direction sliding layer 52 and the clamping rod 41 and is used to provide micro-floating in the Z direction when the circuit board 3 deforms.

[0029] It should be noted that the floating three-dimensional platform 5 realizes multi-degree-of-freedom movement through layered superposition: when the FPC elongates in the X direction due to high temperature, the elastic clamping mechanism 4 and the Z-direction floating layer 53 and the Y-direction sliding layer 52 slide along the X-axis with the X-direction sliding layer 51; when the FPC expands in the Y direction, the Z-direction floating layer 53 slides along the Y-axis with the Y-direction sliding layer 52; and when the FPC warps or angularly deforms in the Z direction, the Z-direction floating layer 53 realizes Z-direction displacement or inclination through its own structure. The movements of the layers are independent and can be coordinated, and the three-dimensional thermal deformation of the FPC is comprehensively compensated; the mechanical stress generated by thermal expansion and contraction of the FPC is released, and the copper foil circuit or the substrate is prevented from cracking, especially in the bending area; in cooperation with the elastic clamping mechanism 4, a clamping and floating double compensation mechanism is formed, and the stability of the FPC test is further improved.

[0030] Please refer to Figures 1-4 The X-direction sliding layer 51 comprises a first base, a first sliding rail 511, a first sliding block 512 and a third reset spring 513; the first sliding rail 511 is arranged on the material plate 2, the first sliding block 512 is fixedly arranged at the bottom of the first base, and the first base is slidably connected to the first sliding rail 511 through the first sliding block 512; and the third reset spring 513 is arranged between the first sliding block 512 and the material plate 2; when the first base loses the restriction, the third reset spring 513 is used to drive the first base to move and reset.

[0031] It should be noted that when the FPC generates X-direction thermal deformation, the pulling force of the FPC on the elastic clamping mechanism 4 is transmitted to the first base through the Z-direction sliding layer 53 and the Y-direction sliding layer 52, the first sliding block 512 is pushed to slide along the first sliding rail 511, the third reset spring 513 is compressed or stretched, and X-direction displacement compensation is realized; when the temperature decreases and the FPC contracts, the elastic force of the third reset spring 513 pulls the first sliding block 512 to reset, so that the first base returns to the initial position; the X-direction thermal deformation of the FPC is accurately compensated through the X-direction sliding layer 51, and the tensile stress generated by forced constraint is avoided; and the third reset spring 513 is automatically reset, so that the platform position is consistent after each test, and the consistency of multiple batches of tests is facilitated.

[0032] Please refer to Figures 1-4The Y-direction sliding layer 52 comprises a second base, a second sliding rail 521, a second sliding block 522, and a fourth reset spring 523. The second sliding rail 521 is arranged on the first base. The second sliding block 522 is fixedly arranged at the bottom of the second base. The second base is slidingly connected to the second sliding rail 521 through the second sliding block 522. The fourth reset spring 523 is arranged between the second sliding block 522 and the second base. When the second base loses the restriction, the fourth reset spring 523 is used to drive the second base to move and reset.

[0033] It should be noted that, the principle of the X-direction sliding layer 51 is the same. When the FPC generates the Y-direction thermal deformation, the second sliding block 522 is pushed to slide along the second sliding rail 521, and the fourth reset spring 523 is deformed to store energy. When the FPC shrinks, the elastic force of the fourth reset spring 523 drives the second base to reset. The Y-direction sliding layer 52 and the X-direction sliding layer 51 are vertically stacked, and together realize the deformation compensation of the FPC in any direction in the plane. The Y-direction thermal deformation compensation of the FPC is cooperated with the X-direction to form a full-direction stress release in the plane. The structure is symmetrical, the sliding resistance is small, and the smooth following of the platform when the FPC deforms is ensured.

[0034] Please refer to Figures 1-4 The Z-direction floating layer 53 comprises a spherical hinge 531 and a plurality of limiting shafts 532. The spherical hinge 531 is arranged between the second base and the clamping rod 41. The spherical hinge 531 comprises a spherical head 5311 and a housing 5312. The housing 5312 is fixedly arranged on the first base. One end of the spherical head 5311 is connected with the housing 5312. The other end of the spherical head 5311 is fixedly arranged on the clamping rod 41. The plurality of limiting shafts 532 are fixedly arranged on the housing 5312. One end of the plurality of limiting shafts 532 extends downward and is connected with the second base. The other end of the plurality of limiting shafts 532 extends upward and forms a protruding part. The spherical head 5311 and the housing 5312 are matched by a gap.

[0035] It should be noted that the spherical hinge 531 realizes multi-angle floating through the gap matching of the spherical head 5311 and the housing 5312. When the FPC generates the Z-direction warping, the spherical head 5311 rotates in the housing 5312, drives the clamping rod 41 to tilt, and compensates the angle deformation of the FPC. When the FPC generates a small change in the Z-direction, the spherical head 5311 can be slightly moved up and down along the housing 5312, and the displacement compensation in the Z-direction is realized. The limiting shaft 532 limits the maximum tilt angle of the spherical head 5311 through the contact with the clamping rod 41, avoids the excessive rotation to cause the FPC to fall off, and solves the deformation stress problem of the FPC in the Z-direction and the angle direction through the arrangement of the Z-direction floating layer 53, especially suitable for the FPC test of the bending area. The limiting shaft 532 ensures the controllable floating range and improves the safety of the device.

[0036] Please refer to Figures 1-4, the fifth reset spring 533 is arranged between the convex part and the clamping rod 41; when the clamping rod 41 loses the restriction, the fifth reset spring 533 is used to drive the clamping rod 41 to move, so that the clamping rod 41 keeps the horizontal reset state.

[0037] It should be noted that in the natural state, the fifth reset spring 533 is in a slightly compressed state, and the clamping rod 41 is subjected to an upward balanced spring force, so that the ball head 5311 is attached to the groove bottom of the shell 5312, and the clamping rod 41 is kept horizontal; when the FPC deformation drives the clamping rod 41 to tilt or sink, the spring at the corresponding position is further compressed or elongated, and the reset energy is stored; when the deformation disappears, the spring force drives the clamping rod 41 to reset to the horizontal state; the horizontal posture of the clamping rod 41 is ensured by the fifth reset spring 533 without external force, which is convenient for the clamping and positioning of the FPC; and the ball hinge 531 is reset, avoiding the platform deviation caused by gravity or slight vibration.

[0038] A multi-board power-on test method based on FPC production, adopting the above-mentioned multi-board power-on test device based on FPC production; specifically comprising the following steps: Step one, elastic clamping: first, a pair of clamping plates 43 on the clamping rod 41 are used to preliminarily clamp the two sides of the circuit board 3, so as to preliminarily fix the circuit board 3 in the spatial position; then the elastic expansion air bag 44 connected with the clamping plate 43 is used to further realize the elastic clamping of the circuit board 3; Step two, clamping adjustment: the expansion or contraction of the elastic expansion air bag 44 is controlled by the driving mechanism 47; when the driving mechanism 47 drives the elastic expansion air bag 44 to expand, it will push the clamping plate 43 connected therewith to move towards the circuit board 3; when the driving mechanism 47 drives the elastic expansion air bag 44 to contract, the clamping plate 43 will move away from the circuit board 3, so as to adjust the clamping force of the clamping plate 43 on the circuit board 3.

[0039] Finally, it should be noted that the above-mentioned is only the preferred embodiment of the present application, and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A multi-board power-on test device based on FPC production, comprising a plurality of material boards (2) arranged on an aging furnace material rack (1) in an aging furnace, wherein a plurality of circuit boards (3) are arranged on the material boards (2), and characterized in that: An elastic clamping mechanism (4) is provided between the material plate (2) and the circuit board (3); a floating three-dimensional platform (5) is provided between the material plate (2) and the elastic clamping mechanism (4); the elastic clamping mechanism (4) comprises a plurality of pairs of clamping rods (41) and a plurality of elastic telescopic airbags (44); each pair of the clamping rods (41) is provided with a notch (42), and both sides of the circuit board (3) are provided on the clamping rods (41) through the notch (42); the elastic telescopic airbags (44) are provided on the clamping rods (41) and are used to provide a clamping force for the circuit board (3); the floating The dynamic three-dimensional platform (5) includes an X-direction sliding layer (51), a Y-direction sliding layer (52), and a Z-direction floating layer (53); the X-direction sliding layer (51) is installed on the material plate (2) and is used to provide micro-floating in the X direction when the circuit board (3) is deformed; the Y-direction sliding layer (52) is installed on the X-direction sliding layer (51) and is used to provide micro-floating in the Y direction when the circuit board (3) is deformed; the Z-direction floating layer (53) is installed between the Y-direction sliding layer (52) and the clamping rod (41) and is used to provide micro-floating in the Z direction when the circuit board (3) is deformed.

2. The multi-board power-on test device based on FPC production according to claim 1, characterized in that: A connecting tube (45) and a telescopic bellows (46) are provided in the clamping rod (41); one end of the connecting tube (45) is connected to the elastic telescopic airbag (44), and the other end of the connecting tube (45) is connected to the telescopic bellows (46); the elastic telescopic airbag (44) is connected to the clamping plate (43) through the connecting tube (45) and the telescopic bellows (46); when the elastic telescopic airbag (44) is expanded under force, the positive pressure in the elastic telescopic airbag (44) is transmitted to the telescopic bellows (46) through the connecting tube (45), so that the telescopic bellows (46) is stretched under force, thereby driving the clamping plate (43) to move and enhance the clamping force on the circuit board (3).

3. The multi-board power-on test device based on FPC production according to claim 1, characterized in that: The elastic clamping mechanism (4) further comprises a plurality of pairs of clamping plates (43) and a driving mechanism (47); a pair of clamping plates (43) are slidably connected in the notch (42) of each clamping rod (41) and are used to clamp the circuit board (3); the driving mechanism (47) is mounted on the clamping rod (41) and is used to drive the elastic telescopic airbag (44) to expand or compress, so as to adjust the clamping force of the notch (42) on the circuit board (3).

4. The multi-board power-on test device based on FPC production according to claim 3, characterized in that: The driving mechanism (47) includes a gear (471), a push block (473), a limiting mechanism (474) and a pair of racks (472); the gear (471) is connected to the clamping rod (41) by rotating around its axis, the pair of racks (472) are connected to the clamping rod (41) by sliding along the expansion and contraction direction of the elastic telescopic airbag (44), and the pair of racks (472) are respectively engaged with both sides of the gear (471), the push block (473) is connected to the clamping rod (41) by sliding, and the push block (473) is fixed to one of the racks (472); the limiting mechanism (474) is arranged on the clamping rod (41) and is used to limit the expansion and compression states of the elastic telescopic airbag (44).

5. The multi-board power-on test device based on FPC production according to claim 4, characterized in that: The limiting mechanism (474) includes a pawl (4741) and a second return spring (4743); the pawl (4741) is rotatably connected to the clamping rod (41) via a rotating shaft, wherein a ratchet groove (4742) adapted to the pawl (4741) is provided on one of the racks (472); a first return spring is provided on the pawl (4741); when the pawl (4741) loses its restriction, the first return spring is used to drive the pawl (4741) to rotate so that the pawl (4741) resumes engagement with the ratchet groove (4742); the second return spring (4743) is provided between the clamping rod (41) and the push block (473).

6. The multi-board power-on test device based on FPC production according to claim 5, characterized in that: The X-direction sliding layer (51) includes a first base, a first slide rail (511), a first slider (512) and a third return spring (513); the first slide rail (511) is arranged on the material plate (2), the first slider (512) is fixed to the bottom of the first base, and the first base is slidably connected to the first slide rail (511) through the first slider (512); the third return spring (513) is arranged between the first slider (512) and the material plate (2); when the first base loses its restriction, the third return spring (513) is used to drive the first base to move and return to its original position.

7. The multi-board power-on test device based on FPC production according to claim 6, characterized in that: The Y-direction sliding layer (52) includes a second base, a second slide rail (521), a second slider (522) and a fourth return spring (523); the second slide rail (521) is arranged on the first base, the second slider (522) is fixed to the bottom of the second base, the second base is slidably connected to the second slide rail (521) through the second slider (522), and the fourth return spring (523) is arranged between the second slider (522) and the second base; when the second base loses its restriction, the fourth return spring (523) is used to drive the second base to move and return to its original position.

8. The multi-board power-on test device based on FPC production according to claim 7, characterized in that: The Z-direction floating layer (53) includes a ball joint (531) and a plurality of limiting shafts (532); the ball joint (531) is arranged between the second base and the clamping rod (41); the ball joint (531) includes a ball head (5311) and a shell (5312); the shell (5312) is fixed to the first base, one end of the ball head (5311) is connected to the shell (5312), and the other end of the ball head (5311) is fixed to the clamping rod (41); the plurality of limiting shafts (532) are fixed to the shell (5312); one end of the plurality of limiting shafts (532) extends downward to be connected to the second base, and the other end of the plurality of limiting shafts (532) extends upward to form a protrusion; A clearance fit is adopted between the ball head (5311) and the housing (5312).

9. The multi-board power-on test device based on FPC production according to claim 8, characterized in that: A fifth return spring (533) is provided between the protrusion and the clamping rod (41); when the clamping rod (41) loses its restraint, the fifth return spring (533) is used to drive the clamping rod (41) to move, so that the clamping rod (41) maintains a horizontal return state.

10. A multi-board power-on test method based on FPC production, characterized by: The multi-board power-on test device based on FPC production according to claim 3 specifically comprises the following steps: Step 1, elastic clamping: first, the two sides of the circuit board (3) are preliminarily clamped by the clamping plates (43) on a pair of clamping rods (41), so as to achieve a preliminary fixation of the circuit board (3) in a spatial position; then, the circuit board (3) is elastically clamped by using the elastic telescopic airbag (44) connected to the clamping plates (43); Step 2: Clamping adjustment: the expansion or contraction of the elastic telescopic airbag (44) is controlled by the driving mechanism (47); when the driving mechanism (47) drives the elastic telescopic airbag (44) to expand, it pushes the clamping plate (43) connected thereto to move toward the circuit board (3); when the driving mechanism (47) drives the elastic telescopic airbag (44) to contract, it moves the clamping plate (43) away from the circuit board (3), thereby adjusting the clamping force of the clamping plate (43) on the circuit board (3).

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