LCD logic board detection device

Abstract

The present invention relates to the field of LCD logic boards, and discloses an LCD logic board detection device, comprising a power-on test component, a clamping mechanism, an upper camera and a lower camera. The clamping mechanism is used to adapt to the size of the logic board and clamp the logic board. The power-on test component is used to realize power-on detection of the logic board. The upper camera and the lower camera cooperate to realize appearance detection of the logic board. The clamping mechanism comprises a base and three linear modules for driving the base to move. A mounting seat is installed above the base through a support rod. The mounting seat is in the shape of a disk with a vertical axis. A clamping unit is installed on the mounting seat. Four groups of the clamping units are arranged in an array along the circumferential direction of the mounting seat. A driving component for adjusting the position of the clamping unit is arranged on the base.

Description

Technical Field

[0001] The invention relates to the field of LCD logic boards, and in particular to an LCD logic board detection device. Background Art

[0002] LCD logic board refers to the logic board of the liquid crystal display. The logic board is also called the screen driver board, central control board, etc. During the production process, it needs to be sampled to ensure the pass rate. The detection of the logic board includes appearance detection, power-on detection, panel pressure detection, etc. Among them, the appearance detection includes the appearance detection of the solder joints on the front and back of the logic board, the electronic components, etc. The power-on detection refers to plugging the logic board, and then powering on the logic board as if it were put into normal use. Regardless of which detection, the logic board needs to be clamped. Based on the search for the clamping of the logic board, some existing technologies have been found, which are now introduced one by one:

[0003] First, the Chinese utility model patent with authorization announcement number CN215067132U discloses a logic board test operation table, which clamps the logic board by cooperating with a clamping plate and a protective pad. Its essence is to clamp the logic board from both sides. Although there is a buffer protection of a spring or a protective pad, the logic board will still be squeezed and damaged to a certain extent if the clamping is too tight.

[0004] Second, the Chinese invention patent with application publication number CN117147313A discloses a panel pressure value detection device for an LCD logic board, which clamps and fixes the logic board placed on the fixing plate by a fixing block. However, the essence of this clamping method is to press the logic board from top to bottom. During the power-on test, the connector in the detection system needs to be inserted into the interface on the side of the logic board. During the insertion process, the logic board is prone to offset, resulting in improper insertion, thereby affecting the final power-on detection result;

[0005] In addition, both of the above-mentioned two clamping methods have the problem of being unable to adapt to the clamping of logic boards of different shapes and sizes.

[0006] Based on the above, the present invention proposes an LCD logic board detection device. Summary of the invention

[0007] In order to solve the problems mentioned in the above background, the present invention provides an LCD logic board detection device.

[0008] In order to achieve the above technical objectives, the technical solution adopted by the present invention is as follows.

[0009] An LCD logic board detection device includes a power-on test component, a clamping mechanism, an upper camera and a lower camera, wherein the clamping mechanism is used to adapt to the size of the logic board and clamp the logic board, the power-on test component is used to realize power-on detection of the logic board, and the upper camera and the lower camera cooperate to realize appearance detection of the logic board;

[0010] The clamping mechanism includes a base and a linear module three that drives the base to move. A mounting seat is installed on the top of the base through a support rod. The mounting seat is in the shape of a circular disc with a vertical axis. A clamping unit is installed on the mounting seat. The clamping unit is arranged in four groups in an array along the circumferential direction of the mounting seat. A driving component for adjusting the position of the clamping unit is arranged on the base.

[0011] Furthermore, the power-on test assembly includes a lifting bracket and a linear module 1 for driving the lifting bracket to move in a vertical direction. Two test seats and a linear module 2 for driving the two test seats to move closer to or away from each other are installed on the lifting bracket. A detachable connecting seat is respectively provided on one side facing each other of the two test seats, and a plurality of joints are respectively provided on one side facing each other of the two connecting seats.

[0012] Furthermore, the clamping unit includes a mounting hole arranged on the upper surface of the mounting seat, a connecting outer shaft in the shape of a hollow shaft is coaxially installed in the mounting hole, the upper and lower ends of the connecting outer shaft are respectively located on the upper and lower sides of the mounting seat, an upper bracket is arranged on the upper end of the connecting outer shaft, a connecting inner shaft is coaxially sleeved in the connecting outer shaft, and the upper and lower ends of the connecting inner shaft both extend out of the connecting outer shaft;

[0013] A guide rod and a screw rod are installed radially along the upper bracket connected to the outer shaft, and the two are parallel to each other, and a vertically arranged vertical rod is arranged between the ends of the two facing the axis of the mounting seat. The interior of the vertical rod is hollow and a clamp is installed on the upper end.

[0014] Furthermore, the driven bevel gear of the bevel gear set arranged between the screw rod and the upper end of the connecting inner shaft is threadedly mounted on the screw rod, and the driven bevel gear can only rotate.

[0015] Furthermore, the clamping member includes a clamping shaft coaxially arranged in the vertical pole and in the shape of a hollow shaft, the upper end surface of the clamping shaft is provided with a clamping claw extending upward, the clamping claw is made of elastic material and a plurality of the clamping claws are arranged in an array along the circumferential direction of the clamping shaft, the upper end of the clamping claw extends out of the vertical pole and is provided with a protrusion on one side of the axis of the vertical pole, and the protrusion is in an arc shape on the side of the axis of the vertical pole;

[0016] The clamping piece also includes a cone block located between the plurality of clamping claws. The horizontal cross-sectional area of ​​the cone block increases from bottom to top. The cone block is coaxial with the clamping axis, and the outer surface of the cone block fits with the convex arc surface.

[0017] Furthermore, a connecting rod extends from the bottom of the cone block, and the connecting rod is connected to an electromagnetic telescopic rod which is arranged in the vertical direction and is disposed in the vertical direction.

[0018] Furthermore, the driving assembly includes a threaded shaft coaxially located below the mounting seat and two first motors that form a power connection with the threaded shaft, a driven member of a power transmission member disposed between one of the first motors and the threaded shaft and the threaded shaft form a threaded connection, and a driven member of a power transmission member disposed between the other first motor and the threaded shaft and the threaded shaft form a sliding connection along the vertical direction;

[0019] The upper end of the threaded shaft is provided with a driving unit.

[0020] Furthermore, the driving unit includes a cantilever bracket arranged at the upper end of the threaded shaft, a driving outer shaft arranged vertically and in the shape of a hollow shaft is installed at the end of the cantilever bracket, the driving outer shaft is divided into a coaxial upper power section and a lower mounting section with unequal diameters along the axis direction, a driving inner shaft in the shape of a hollow shaft is coaxially sleeved in the lower mounting section, and two second motors are respectively connected to the driving outer shaft and the driving inner shaft by power;

[0021] The inner wall of the driving inner shaft is provided with spline 1 along the axis direction, and a plurality of spline 1s are arranged in an array along the circumferential direction of the driving inner shaft. The outer wall of the connecting inner shaft is provided with spline 2 along the axis direction, and a plurality of spline 2s are arranged in an array along the circumferential direction of the connecting inner shaft. When the driving inner shaft is coaxially located below the connecting inner shaft, the driving inner shaft moves upward, so that the connecting inner shaft can be inserted into the driving inner shaft and the two are dynamically connected through the cooperation of spline 1 and spline 2.

[0022] Furthermore, a damping component is provided between the connecting outer shaft and the mounting seat, the damping component comprises an outer cover shell provided on the mounting seat and coaxially surrounding the outer periphery of the connecting outer shaft, a guide groove is provided radially on the inner side of the outer cover shell, a friction block is slidably installed in the guide groove, the side of the friction block facing the connecting outer shaft is an arc surface shape coaxial with the outer circumferential surface of the connecting outer shaft and having the same diameter, a spring is provided between the friction block and the bottom of the guide groove, and initially, driven by the elastic force of the spring, the friction block fits the connecting outer shaft;

[0023] A ring hole is coaxially arranged at the bottom of the outer cover shell, a ring is sleeved in the ring hole, an upper convex ring is coaxially arranged on the upper end of the ring, the outer diameter of the upper convex ring decreases from bottom to top, and a lower convex block is arranged at the bottom of the friction block, the lower convex block is located on the side of the upper convex ring away from the external shaft and the two are in fit.

[0024] Furthermore, the upper camera is arranged on the lower surface of the lifting bracket and is located between the two test seats, and the lower camera is installed at the middle position of the upper surface of the mounting seat.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] This solution can adaptively clamp logic boards of different sizes and implement power-on test, interface plug-in test and appearance test of the logic board. On this basis:

[0027] 1. This solution is to clamp the logic board by the cooperation between the clamping piece and the screw hole. Specifically, the clamping piece is first inserted into the screw hole, and then the clamping claws are spread outward to achieve self-centering internal clamping of the screw hole. Compared with the two common clamping methods disclosed in the background technology, this clamping method is more stable and will not damage the logic board;

[0028] 2. In the present solution, the clamping member is driven to rotate around the connecting outer shaft and move radially along the connecting outer shaft, so that the clamping member moves in the plane coordinate system, thereby changing the positional relationship between the four clamping members according to the size of the logic board to be tested to match the four screw holes of the logic board. The advantage of this adjustment method is that the structure is simple and the driving structure is greatly simplified. It is easy for technical personnel in this field to think of using the existing 3D printer to drive the printing table to move in the three-dimensional coordinate system to drive the clamping member to move in the plane coordinate system, but this method means that each clamping member needs to have two motors, and four clamping members need eight motors. In contrast, in the present solution, only four motors are needed to achieve position adjustment, the driving structure is simplified, and the cost is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the structure of the present invention when clamping a logic board;

[0030] Figure 2 A schematic diagram of the structure of the present invention when testing a logic board;

[0031] Figure 3 is a schematic diagram of the energized test assembly and the clamping mechanism;

[0032] Figure 4 Schematic diagram of the clamping mechanism Figure 1 ;

[0033] Figure 5 Schematic diagram of the clamping mechanism Figure 2 ;

[0034] Figure 6 is a schematic diagram of a drive unit;

[0035] Figure 7 Schematic diagram of the clamping unit Figure 1 ;

[0036] Figure 8 Schematic diagram of the clamping unit Figure 2 ;

[0037] Fig. 9 is an exploded view of the clamping member;

[0038] Fig.10 A cross-sectional view of the damping component.

[0039] The reference numerals in the accompanying drawings are:

[0040] 100, outer shell; 200, power-on test assembly; 201, linear module 1; 202, lifting bracket; 203, linear module 2; 204, test seat; 205, connecting seat; 300, clamping mechanism; 301, linear module 3; 302, base; 303, first motor; 304, threaded shaft; 305, drive unit; 3051, second motor; 3052, drive inner shaft; 3053, drive outer shaft; 306, mounting seat; 307, clamping unit; 308, connecting outer Shaft; 309, connecting inner shaft; 310, upper bracket; 311, guide rod; 312, screw rod; 313, vertical rod; 314, clamping member; 3141, clamping shaft; 3142, clamping claw; 315, cone block; 3151, connecting rod; 316, electromagnetic telescopic rod; 317, damping component; 3171, outer cover shell; 3172, friction block; 3173, spring; 3174, collar; 3175, upper convex ring; 3176, lower convex block; 400, upper camera; 500, lower camera. DETAILED DESCRIPTION

[0041] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0042] In the attached figure of this scheme, a refers to the logic board to be tested. The logic board generally includes a video input signal interface, a power port, an LCD screen interface, etc. In this scheme, by inserting the connector into the corresponding interface and then powering on for use, it is determined whether the logic board can be used normally. Through the cooperation of the upper and lower cameras, the appearance inspection of the logic board is achieved.

[0043] Reference Figure 1-Figure 10 A LCD logic board detection device includes a power-on test component 200 and a clamping mechanism 300. The clamping mechanism 300 is used to self-center the logic board and can adapt to the size of the logic board. After clamping, the logic board is sent to the power-on test component 200 for maintenance through the clamping mechanism 300. The power-on test component 200 is used to perform power-on detection on the logic board. At the same time, the upper camera 400 and the lower camera 500 located on the upper and lower sides of the logic board are used to perform appearance detection on the front and back sides of the logic board.

[0044] Furthermore, the detection device further comprises an outer shell 100 , the power-on test assembly 200 is located inside the outer shell 100 , one side of the outer shell 100 is open, and the clamping mechanism 300 can enter and exit the outer shell 100 .

[0045] 1. Power on test assembly 200:

[0046] Reference Figure 3 The power-on test assembly 200 includes a lifting bracket 202 and a linear module 201 for driving the lifting bracket 202 to move in the vertical direction. Two test sockets 204 are installed on the lifting bracket 202 in a horizontal sliding direction. The two test sockets 204 are driven by the linear module 203 to move closer to or away from each other. A detachable connecting socket 205 is respectively provided on one side facing each other of the two test sockets 204. A plurality of connectors are respectively matched on one side facing each other of the two connecting sockets 205. The disassembly method can be realized by the existing technology and will not be elaborated. When the model of the logic board to be tested changes, the staff can replace the corresponding matching connecting socket 205.

[0047] The upper camera 400 is disposed on the lower surface of the lifting bracket 202 and is located between the two test seats 204 .

[0048] When the clamping mechanism 300 pulls the logic board between the two test sockets 204 and the interface of the logic board is aligned one by one with the connector of the power-on test component 200, when the two test sockets 204 are close to each other, the connector can be inserted into the interface of the logic board, otherwise, the connector can be unplugged. After the plugging is completed, the power-on test of the logic board can be realized by turning on the power. In addition, the plugging performance of the logic board can be tested by repeatedly plugging and unplugging.

[0049] 2. Clamping mechanism 300:

[0050] Reference Figure 3-Figure 10 The clamping mechanism 300 includes a base 302 and a linear module 301 for driving the base 302 to move. The base 302 can move in and out of the outer shell 100.

[0051] A mounting seat 306 is installed above the base 302 through a support rod. The mounting seat 306 is in the shape of a disk with a vertical axis. A clamping unit 307 is installed on the mounting seat 306. Four groups of clamping units 307 are arranged in an array along the circumferential direction of the mounting seat 306. The four groups of clamping units 307 cooperate to clamp the logic board. A driving assembly is provided on the base 302. The driving assembly is used to adjust the clamping unit 307 so that the clamping unit 307 can clamp logic boards of different sizes.

[0052] The lower camera 500 is mounted at a middle position of the upper surface of the mounting base 306 .

[0053] Reference Figure 7-10 The clamping unit 307 includes a mounting hole arranged on the upper surface of the mounting seat 306, and a connecting outer shaft 308 in the shape of a hollow shaft is coaxially installed in the mounting hole. The upper and lower ends of the connecting outer shaft 308 are respectively located on the upper and lower sides of the mounting seat 306. An upper bracket 310 is arranged on the upper end of the connecting outer shaft 308, and a connecting inner shaft 309 is coaxially sleeved in the connecting outer shaft 308, and the upper and lower ends of the connecting inner shaft 309 both extend out of the connecting outer shaft 308.

[0054] A guide rod 311 and a screw rod 312 are installed on the upper bracket 310 along the radial direction of the connecting outer shaft 308, and the two are parallel to each other, and a vertically arranged vertical rod 313 is arranged between the ends of the two facing the axial centerline of the mounting seat 306, and the driven bevel gear of the bevel gear set arranged between the screw rod 312 and the upper end of the connecting inner shaft 309 is threadedly installed on the screw rod 312, and the driven bevel gear can only rotate. Therefore, when the driving component drives the connecting inner shaft 309 to rotate, it can drive the guide rod 311 and the screw rod 312 to move along the axial centerline direction and move with the vertical rod 313. When the driving component drives the connecting outer shaft 308 to rotate, it will rotate the upper bracket 310 and the guide rod 311, screw rod 312 and vertical rod 313 installed on the upper bracket 310.

[0055] The interior of the vertical pole 313 is hollow and a clamping member 314 is installed on the upper end. Furthermore, the clamping member 314 includes a clamping shaft 3141 which is coaxially arranged in the vertical pole 313 and is in the shape of a hollow shaft. A clamping claw 3142 extends upward from the upper end surface of the clamping shaft 3141. The clamping claw 3142 is made of elastic material and is arranged in an array along the circumferential direction of the clamping shaft 3141. The upper end of the clamping claw 3142 extends out of the vertical pole 313 and is provided with a protrusion on the side facing the axis of the vertical pole 313. The protrusion is in the shape of an arc surface on the side facing the axis of the vertical pole 313.

[0056] The clamping member 314 also includes a cone block 315 located between a plurality of clamping claws 3142. The horizontal cross-sectional area of ​​the cone block 315 increases from bottom to top. The cone block 315 is coaxial with the clamping shaft 3141. The outer surface of the cone block 315 fits the convex curved surface. A connecting rod 3151 extends from the bottom of the cone block 315. The connecting rod 3151 is connected to an electromagnetic telescopic rod 316 disposed in the vertical rod 313. The electromagnetic telescopic rod 316 is used to pull the connecting rod 3151 and the cone block 315 to move in the vertical direction. This is a method that can be implemented in the prior art. When the cone block 315 moves downward, the clamping claw 3142 can be driven to open outward. Conversely, when the cone block 315 moves upward, the clamping claw 3142 is reset. In addition, the electromagnetic telescopic rod 316 is used because the principle of the electromagnetic telescopic rod 316 is to generate a magnetic field that interacts with the conductor by energizing the coil, thereby achieving the purpose of telescoping. Compared with the existing electric telescopic rod, its volume can be made very small. Therefore, it will not block the lower camera 500 and will not affect the appearance inspection of the lower surface of the logic board.

[0057] Reference Figure 5 and Figure 6 The driving assembly includes a threaded shaft 304 coaxially located below the mounting seat 306 and two first motors 303 that form a power connection with the threaded shaft 304, wherein a driven member of a power transmission member arranged between one first motor 303 and the threaded shaft 304 and the threaded shaft 304 form a threaded connection, and a driven member of a power transmission member arranged between another first motor 303 and the threaded shaft 304 and the threaded shaft 304 form a sliding connection along the vertical direction, for example, a slide groove is provided on the outer cylindrical surface of the threaded shaft 304 along the axial direction, a slider is provided on the inner wall of the driven member, and the slider slides in the slide groove.

[0058] The two first motors 303 are both based on existing servo motor technology. Through the cooperation of the two first motors 303 , the threaded shaft 304 can be driven to rotate only or move only or rotate and move at the same time.

[0059] A driving unit 305 is arranged at the upper end of the threaded shaft 304, and the driving unit 305 includes a cantilever bracket arranged at the upper end of the threaded shaft 304, and a driving outer shaft 3053 which is arranged vertically and is in the shape of a hollow shaft is installed at the end of the cantilever bracket. The driving outer shaft 3053 is divided into a coaxial upper power section and a lower mounting section with unequal diameters along the axis direction, and a driving inner shaft 3052 in the shape of a hollow shaft is coaxially sleeved in the lower mounting section, and two second motors 3051 which are respectively connected to the driving outer shaft 3053 and the driving inner shaft 3052 for power.

[0060] The inner wall of the driving inner shaft 3052 is provided with spline 1 along the axial direction, and a plurality of spline 1s are arranged in an array along the circumferential direction of the driving inner shaft 3052. The outer wall of the connecting inner shaft 309 is provided with spline 2 along the axial direction, and a plurality of spline 2s are arranged in an array along the circumferential direction of the connecting inner shaft 309. When the driving inner shaft 3052 is coaxially located below the connecting inner shaft 309, the driving inner shaft 3052 is driven upward, so that the connecting inner shaft 309 can be inserted into the driving inner shaft 3052 and the two are dynamically connected through the cooperation of spline 1 and spline 2. Similarly, the driving outer shaft 3053 and the connecting outer shaft 308 are also dynamically connected in the same way, which will not be elaborated herein.

[0061] The clamping process of the clamping mechanism 300 on the logic board is specifically as follows:

[0062] 1. Adjustment process of the clamping mechanism 300:

[0063] First, the first motor 303 drives the threaded shaft 304 to rotate, so that the driving inner shaft 3052 is coaxially located below the connecting inner shaft 309 of the clamping unit 307. Then, the first motor 303 drives the threaded shaft 304 to move upward, so that the connecting inner shaft 309 is inserted into the driving inner shaft 3052 to form a power connection, and the connecting outer shaft 308 is inserted into the driving outer shaft 3053 to form a power connection.

[0064] Then, the two second motors 3051 drive the inner drive shaft 3052 and the outer drive shaft 3053 to rotate respectively, and the inner drive shaft 3052 rotates with the connecting inner shaft 309, and the screw rod 312 can be driven to move along the axis centerline through the bevel gear set, thereby moving the clamping member 314 together, and the outer drive shaft 3053 rotates with the connecting outer shaft 308, and the connecting outer shaft 308 rotates with the upper bracket 310, thereby rotating the clamping member 314 around the axis centerline of the connecting outer shaft 308. The cooperation of the two can move the clamping member 314 to any coordinate point in a plane coordinate system, thereby enabling the clamping member 314 to be located at any position of the plane;

[0065] In the existing logic board technology, generally, a screw hole is provided at each of the four right angles for assembling the logic board. In this solution, the above operation is repeated four times, so that the positional relationship between the four clamping members 314 matches the positional relationship between the four screw holes of the logic board.

[0066] 2. Clamping process:

[0067] First, the four screw holes of the logic board are respectively sleeved on the outside of the four clamping members 314 by manual or existing robotic arm technology. Since the screw holes and the clamping members 314 initially form a clearance fit, it is easy to sleeve the screw holes on the outside of the clamping members 314, and support the logic board through the upper open end of the vertical rod 313;

[0068] Then, the electromagnetic telescopic rod 316 is activated to pull the cone block 315 downward, so that the clamping claws 3142 are stretched outward to implement self-centering internal clamping of the screw holes. Under the cooperation of the self-centering internal clamping of the four clamping members 314, the logic board is clamped.

[0069] Finally, the base 302 is driven into the outer shell 100 by the linear module three 301, so that the logic board is located directly below the area between the two test sockets 204, and the linear module one 201 drives the lifting bracket 202 to move downward, so that the interface of the logic board is aligned one by one with the connector of the power-on test component 200.

[0070] In a preferred embodiment, during the adjustment process of the clamping mechanism 300, the movement of the traction clamping member 314 is achieved by the cooperation between the screw rod 312 and the driven bevel gear. The threaded connection means that a certain force is required to drive the driven bevel gear to rotate. Therefore, after the adjustment is completed, when the inner shaft 3052 is driven to move downward and the power connection with the connecting inner shaft 309 is disconnected, the clamping member 314 is difficult to deviate. However, because the traction clamping member 314 needs to be rotated around the axis of the connecting outer shaft 308, the connecting outer shaft 308 and the mounting hole are rotationally connected, and the rotational resistance is very small, for example, by bearing installation. Therefore, after the adjustment is completed, when the outer shaft 3053 is driven to move downward and the power connection with the connecting outer shaft 308 is disconnected, it is easy to cause the connecting outer shaft 308 to rotate slightly, thereby causing the clamping member 314 to deflect slightly, which will affect the accuracy of the adjustment result. In order to solve this problem, refer to Figure 8 A damping component 317 is provided between the outer shaft 308 and the mounting seat 306 .

[0071] Specifically, refer to Fig.10 The damping component 317 includes an outer cover shell 3171 which is arranged on the mounting seat 306 and coaxially surrounds the outer periphery of the connecting outer shaft 308. A guide groove is radially arranged on the inner side of the outer cover shell 3171. A friction block 3172 is slidably installed in the guide groove. The side of the friction block 3172 facing the connecting outer shaft 308 is an arc surface shape which is coaxial and equal in diameter to the outer circular surface of the connecting outer shaft 308. A spring 3173 is arranged between the friction block 3172 and the bottom of the guide groove. Initially, driven by the elastic force of the spring 3173, the friction block 3172 fits with the connecting outer shaft 308. Under the action of the friction force between the two, a large force is required to drive the connecting outer shaft 308 to rotate.

[0072] A ring hole is coaxially arranged at the bottom of the outer cover shell 3171, and a ring 3174 is sleeved on the ring hole. An upper convex ring 3175 is coaxially arranged on the upper end of the ring 3174. The outer diameter of the upper convex ring 3175 decreases from bottom to top. A lower convex block 3176 is arranged at the bottom of the friction block 3172. The lower convex block 3176 is located on the side of the upper convex ring 3175 away from the outer shaft 308 and the two are in fit.

[0073] When the first motor 303 drives the threaded shaft 304 to move upward, the connecting inner shaft 309 is inserted into the driving inner shaft 3052 to form a power connection, and the connecting outer shaft 308 is inserted into the driving outer shaft 3053 to form a power connection, the driving outer shaft 3053 will contact the collar 3174, thereby pushing the collar 3174 to move upward, and the friction block 3172 retreats and breaks away from the contact with the connecting outer shaft 308 through the cooperation of the upper convex ring 3175 and the lower convex block 3176, and then the connecting outer shaft 308 can rotate normally;

[0074] After the adjustment of the clamping mechanism 300 is completed, the threaded shaft 304 moves downward. At the beginning of the downward movement process, since the connecting outer shaft 308 has not yet disengaged from the driving outer shaft 3053, it is difficult for the connecting outer shaft 308 to deflect, because the deflection mostly occurs at the moment of disengagement. At the same time, the spring 3173 gradually releases its elastic force, causing the damping component 317 to gradually reset. When the damping component 317 completes its reset and re-applies friction resistance to the rotation of the connecting outer shaft 308, the driving outer shaft 3053 is separated from the connecting outer shaft 308. Therefore, the problem that the connecting outer shaft 308 is easy to deflect and causes the adjusted position of the clamp 314 to change is solved.

[0075] From the above description, we can know that:

[0076] This solution can adaptively clamp logic boards of different sizes and implement power-on test, interface plug-in test and appearance test of the logic board. On this basis:

[0077] 1. This solution is to clamp the logic board by the cooperation between the clamping piece and the screw hole. Specifically, the clamping piece is first inserted into the screw hole, and then the clamping claws are spread outward to achieve self-centering internal clamping of the screw hole. Compared with the two common clamping methods disclosed in the background technology, this clamping method is more stable and will not damage the logic board;

[0078] 2. In the present solution, the clamping member is driven to rotate around the connecting outer shaft and move radially along the connecting outer shaft, so that the clamping member moves in the plane coordinate system, thereby changing the positional relationship between the four clamping members according to the size of the logic board to be tested to match the four screw holes of the logic board. The advantage of this adjustment method is that the structure is simple and the driving structure is greatly simplified. It is easy for technical personnel in this field to think of using the existing 3D printer to drive the printing table to move in the three-dimensional coordinate system to drive the clamping member to move in the plane coordinate system, but this method means that each clamping member needs to have two motors, and four clamping members need eight motors. In contrast, in the present solution, only four motors are needed to achieve position adjustment, the driving structure is simplified, and the cost is lower.

[0079] In this solution, linear module one and linear module three can adopt existing electric telescopic rod technology or existing screw linear motion technology, and linear module two can adopt a motor to drive the screw to rotate. The screw is divided into two screw segments with opposite thread rotation directions along the axis direction. The two screw segments are respectively connected to a component, and the components form a sliding connection with the surrounding brackets. Therefore, the rotation of the screw can drive the two components to move closer to or away from each other.

[0080] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An LCD logic board detection device, characterized in that: The device comprises a power-on test component (200), a clamping mechanism (300), an upper camera (400) and a lower camera (500); the clamping mechanism (300) is used to adapt to the size of a logic board and clamp the logic board; the power-on test component (200) is used to implement power-on detection of the logic board; and the upper camera (400) and the lower camera (500) cooperate to implement appearance detection of the logic board; The clamping mechanism (300) comprises a base (302) and a linear module three (301) for driving the base (302) to move; a mounting seat (306) is mounted above the base (302) via a support rod; the mounting seat (306) is in the shape of a disk with a vertical axis; a clamping unit (307) is mounted on the mounting seat (306); four groups of the clamping units (307) are arranged in an array along the circumferential direction of the mounting seat (306); and a driving component for adjusting the position of the clamping unit (307) is arranged on the base (302); The clamping unit (307) comprises a mounting hole arranged on the upper surface of the mounting seat (306), a connecting outer shaft (308) in the shape of a hollow shaft being coaxially mounted in the mounting hole, upper and lower ends of the connecting outer shaft (308) being respectively located on upper and lower sides of the mounting seat (306), an upper bracket (310) being arranged at the upper end of the connecting outer shaft (308), a connecting inner shaft (309) being coaxially sleeved in the connecting outer shaft (308), and upper and lower ends of the connecting inner shaft (309) both extending out of the connecting outer shaft (308); A guide rod (311) and a screw rod (312) are installed on the upper bracket (310) along the radial direction connected to the outer shaft (308), and the two are parallel to each other. A vertically arranged vertical rod (313) is provided between the ends of the two facing the axis of the mounting seat (306), and the interior of the vertical rod (313) is hollow and a clamping member (314) is installed on the upper end; The clamping member (314) comprises a clamping shaft (3141) coaxially arranged in the vertical rod (313) and in the shape of a hollow shaft. A clamping claw (3142) extends upward from the upper end surface of the clamping shaft (3141). The clamping claw (3142) is made of elastic material and is arranged in an array along the circumferential direction of the clamping shaft (3141). The upper end of the clamping claw (3142) extends out of the vertical rod (313) and is provided with a protrusion on the side facing the axis of the vertical rod (313). The protrusion is in the shape of an arc on the side facing the axis of the vertical rod (313). The clamping member (314) further comprises a cone block (315) located between the plurality of clamping claws (3142), the horizontal cross-sectional area of ​​the cone block (315) increasing from bottom to top, the cone block (315) being coaxial with the clamping shaft (3141), and the outer surface of the cone block (315) being in contact with the convex curved surface.

2. The LCD logic board detection device according to claim 1, characterized in that: The power-on test assembly (200) comprises a lifting bracket (202) and a linear module 1 (201) for driving the lifting bracket (202) to move in a vertical direction; two test seats (204) and a linear module 2 (203) for driving the two test seats (204) to move toward or away from each other are mounted on the lifting bracket (202); a detachable connecting seat (205) is respectively provided on one side of the two test seats (204) facing each other; and a plurality of joints are respectively provided on one side of the two connecting seats (205) facing each other.

3. The LCD logic board detection device according to claim 2, characterized in that: The driven bevel gear of the bevel gear set arranged between the screw rod (312) and the upper end of the connecting inner shaft (309) is threadedly mounted on the screw rod (312), and the driven bevel gear can only rotate.

4. The LCD logic board detection device according to claim 3, characterized in that: A connecting rod (3151) extends from the bottom of the cone block (315), and the connecting rod (3151) is connected to an electromagnetic telescopic rod (316) which is arranged in the vertical direction and is disposed in the vertical direction of the telescopic direction.

5. The LCD logic board detection device according to claim 3, characterized in that: The driving assembly comprises a threaded shaft (304) coaxially located below the mounting seat (306) and two first motors (303) that form a power connection with the threaded shaft (304); a driven member of a power transmission member disposed between one of the first motors (303) and the threaded shaft (304) and the threaded shaft (304) form a threaded connection with the threaded shaft (304); and a driven member of a power transmission member disposed between the other first motor (303) and the threaded shaft (304) and the threaded shaft (304) form a sliding connection along a vertical direction; A driving unit (305) is provided at the upper end of the threaded shaft (304).

6. The LCD logic board detection device according to claim 5, characterized in that: The driving unit (305) comprises a cantilever bracket arranged at the upper end of the threaded shaft (304); a driving outer shaft (3053) arranged vertically and in the shape of a hollow shaft is installed at the end of the cantilever bracket; the driving outer shaft (3053) is divided into a coaxial upper power section and a lower installation section with unequal diameters along the axis direction; a driving inner shaft (3052) in the shape of a hollow shaft is coaxially sleeved in the lower installation section; and two second motors (3051) are arranged on the cantilever bracket and are respectively connected to the driving outer shaft (3053) and the driving inner shaft (3052) in power; The inner wall of the driving inner shaft (3052) is provided with a spline 1 along the axis direction, and a plurality of splines 1 are arranged in an array along the circumferential direction of the driving inner shaft (3052). The outer wall of the connecting inner shaft (309) is provided with a spline 2 along the axis direction, and a plurality of splines 2 are arranged in an array along the circumferential direction of the connecting inner shaft (309). When the driving inner shaft (3052) is coaxially located below the connecting inner shaft (309), the driving inner shaft (3052) moves upward, so that the connecting inner shaft (309) can be inserted into the driving inner shaft (3052), and the two are dynamically connected through the cooperation of the spline 1 and the spline 2.

7. The LCD logic board detection device according to claim 6, characterized in that: A damping component (317) is provided between the connecting outer shaft (308) and the mounting seat (306), and the damping component (317) comprises an outer cover shell (3171) which is provided on the mounting seat (306) and coaxially surrounds the outer periphery of the connecting outer shaft (308), a guide groove is provided radially on the inner side of the outer cover shell (3171), a friction block (3172) is slidably installed in the guide groove, and the side of the friction block (3172) facing the connecting outer shaft (308) is in the shape of an arc surface which is coaxial and equal in diameter to the outer cylindrical surface of the connecting outer shaft (308), a spring (3173) is provided between the friction block (3172) and the bottom of the guide groove, and initially, driven by the elastic force of the spring (3173), the friction block (3172) fits with the connecting outer shaft (308); The bottom of the outer cover shell (3171) is coaxially provided with an annular hole, a sleeve ring (3174) is sleeved in the annular hole, an upper convex ring (3175) is coaxially provided at the upper end of the sleeve ring (3174), the outer diameter of the upper convex ring (3175) decreases from bottom to top, and a lower convex block (3176) is provided at the bottom of the friction block (3172), the lower convex block (3176) is located on the side of the upper convex ring (3175) away from the outer shaft (308), and the two are in close contact.

8. The LCD logic board detection device according to claim 1, characterized in that: The upper camera (400) is arranged on the lower surface of the lifting bracket (202) and is located between the two test seats (204), and the lower camera (500) is installed at the middle position of the upper surface of the mounting seat (306).

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