Computer display screen strength testing device

Abstract

The invention relates to the technical field of display screen detection equipment. The invention discloses a computer display screen strength testing device. A mounting plate is horizontally arranged at the bottom of a mounting seat; the device further comprises a sequential feeding device, the top of the mounting base is provided with the sequential feeding device used for feeding and discharging a plurality of display screens so as to facilitate detection work, the top of the mounting plate is provided with an impact testing device used for testing the strength of the display screens, and one side of the top of the mounting plate is provided with an intermittent transmission device. A locking device is arranged on one side of the transmission ratio adjusting device, and a linkage device is arranged on the transmission ratio adjusting device. According to the invention, two detection modes are realized, one mode is that the impact speed of the test piece is gradually increased under the condition that the size of the impact contact surface of the test piece and the display screen is not changed, and the other mode is that the impact contact area of the test piece and the display screen is gradually reduced under the condition that the impact speed of the test is not changed, so that how many times of impact can be borne by the display screen can be observed; therefore, the effect of rich and diversified detection results is presented.

Description

Technical Field

[0001] The invention relates to the technical field of display screen detection equipment, in particular to a computer display screen strength testing device. Background Art

[0002] The computer display screen strength test device is to damage the display screen through pressure, so as to record the pressure resistance of the display screen, and improve the display screen through data analysis to achieve the best pressure resistance, making the computer display screen more practical and strong; The traditional display screen strength detection method is to control a test piece to continuously impact the display surface of the display screen to observe how many times the display screen will break after being impacted. However, this detection method is relatively simple and cannot automatically switch the impact force of the test piece on the display screen, and cannot switch the size of the test piece to detect the impact of the different impact contact surfaces between the test piece and the display screen on the test results under the same impact force. There is a lack of a device with two detection modes, one is to gradually increase the impact speed of the test piece while keeping the size of the impact contact surface between the test piece and the display screen unchanged, and the other is to gradually reduce the impact contact area between the test piece and the display screen while keeping the impact speed unchanged, so as to observe how many impacts the display screen can withstand, thereby presenting a rich and diverse test results. Summary of the invention

[0003] The purpose of the present invention is to provide a computer display screen strength test device to solve the problems raised in the above background technology. To achieve the above purpose, the present invention provides the following technical solutions: a computer display screen strength test device, comprising: A mounting seat, the mounting seat is arranged on a horizontal plane, and a mounting plate is horizontally arranged at the bottom of the mounting seat; Also includes: A sequential loading device, the top of the mounting seat is provided with a sequential loading device for loading and unloading multiple display screens for facilitating testing work, the top of the mounting plate is provided with an impact testing device for performing strength testing on the display screen, one side of the top of the mounting plate is provided with an intermittent transmission device, one side of the intermittent transmission device cooperates with the intermittent transmission device and the impact testing device to realize a transmission ratio adjustment device for two different detection modes for the display screen, one side of the transmission ratio adjustment device is provided with a locking device for automatically locking and unlocking the transmission ratio adjustment device, and the impact testing device, the intermittent transmission device and the transmission ratio adjustment device are provided with a linkage device for facilitating sharing of a driving source.

[0004] Preferably, the sequential feeding device includes an electric push rod, which is horizontally arranged on the top of the mounting seat, and a movable plate is slidably connected to the top of the mounting seat, one side of the movable plate is connected to the output end of the electric push rod, and two limit frames are symmetrically arranged on both sides of the movable plate, one end of the two limit frames is fixedly connected to the top of the mounting seat, and the other ends of the two limit frames are located on the outside of the mounting seat, and two feeding racks are symmetrically arranged between the two limit frames, and the sides of the two feeding racks close to each other are provided with limit grooves for limiting the four corners of a plurality of display screens, and the ends of the two feeding racks away from each other respectively pass through the two limit grooves. The upper end of the inner side of the positioning frame is connected with it for transverse sliding, and the two loading frames are symmetrically provided with a first arc-shaped slide groove, and two supporting plates are symmetrically provided directly below the two loading frames, and the two supporting plates are respectively connected with the lower ends of the inner sides of the two limiting frames for transverse sliding, and the two supporting plates are symmetrically provided with a second arc-shaped slide groove, and two first pulleys are respectively rotatably provided at both ends of the upper part of one side of the moving plate, and the two first pulleys are respectively connected with the inner sides of the two first arc-shaped slide grooves for sliding, and two second pulleys are respectively connected with the inner sides of the two second arc-shaped slide grooves for sliding; Two clamping boxes are symmetrically arranged directly below the two limit frames, and the ends of the two clamping boxes away from each other are respectively connected to the ends of the two loading frames away from each other. The clamping box is arranged in an L shape, and a first toothed rod is provided at the lower end of one side of the clamping box, one end of the first toothed rod passes through the side end of the clamping box and is located inside the clamping box, and the other end of the first toothed rod is located outside the clamping box, and a first spring is provided between one side of the first toothed rod located inside the clamping box and the side end inside the clamping box, a second toothed rod is horizontally arranged directly above the first toothed rod, and the second toothed rod passes through the side end of the clamping box and is located inside the clamping box, a first gear is rotatably arranged inside the clamping box, and the first gear is respectively meshed with the top of the first toothed rod and the bottom of the second toothed rod.

[0005] Preferably, the intermittent transmission device includes a rotating seat, a toothed ring, a driving motor, an intermittent gear, a sliding rod, a matching gear, a transmission gear, a third toothed rod, a fourth toothed rod and a second gear, the rotating seat is arranged on one side of the top of the mounting plate, the toothed ring is arranged on the top of the rotating seat and the toothed ring is rotatably connected to the rotating seat, a plurality of teeth are arranged on the outer side of the toothed ring and a circle of teeth is arranged on the inner side of the toothed ring, the driving motor is arranged on the inner side of the toothed ring, the intermittent gear is arranged on the output end of the driving motor, a tooth is arranged on the outer side of the intermittent gear and the intermittent gear is pre-engaged with the inner side of the toothed ring, and a sliding rod is vertically and rotatably arranged on one side of the rotating seat The movable rod, the mating gear is arranged at the upper end of the sliding rod and is connected with the upper and lower damping sliding connection therewith, and the mating gear is pre-engaged with the teeth on the outer side of the toothed ring, the transmission gear is rotatably arranged at the top of the mounting plate and the transmission gear is meshed with the mating gear, the third toothed rod and the fourth toothed rod are spaced apart and arranged on one side of the top of the mounting plate, and the third toothed rod and the fourth toothed rod are slidably connected with the top of the mounting plate in the horizontal direction, the second gear is rotatably arranged at the top of the mounting plate and is located between the third toothed rod and the fourth toothed rod, and the second gear is respectively meshed with one side adjacent to the third toothed rod and the fourth toothed rod, and the side of the third toothed rod close to the transmission gear is meshed with the transmission gear.

[0006] Preferably, the transmission ratio adjustment device includes a first transmission assembly, a second transmission assembly and a transmission belt. The first transmission assembly and the second transmission assembly have the same structure and are respectively arranged at the side ends of the third toothed rod and the fourth toothed rod. The first transmission assembly includes a mounting frame, a trapezoidal block, a sliding wheel, a connecting column, a second spring, a rotating disk, a rotating sleeve, a first connecting rod, a second connecting rod, a connecting plate, a mounting plate, a connecting wheel and a rotating frame. The trapezoidal block is arranged at the side end of the third toothed rod, and the height of the trapezoidal block gradually decreases from one end close to the third toothed rod to the end away from the third toothed rod. The mounting frame is arranged directly above the trapezoidal block. The connecting column vertically passes through the top of the mounting frame and is slidably connected with it up and down. The sliding wheel is rotatably arranged at the bottom of the connecting column and the sliding wheel is located in the middle of the top of the trapezoidal block and contacts it. The second spring sleeve is arranged on the outside of the connecting column and the two ends of the second spring are respectively connected to the mounting frame and the sliding wheel. The rotating disk is rotatably arranged at the top of the mounting frame. The top of the connecting column passes through the center of the rotating disk and does not contact it. The rotating sleeve is rotatably arranged at the upper end of the connecting column. The connecting plate has four The four connecting plates are evenly distributed on the four sides of the top of the rotating disk, and the bottom of the connecting plate is slidably connected with the rotating disk along a straight line toward the center of the rotating disk. The first connecting rod and the second connecting rod are provided with four, and the four first connecting rods are evenly distributed on the four sides of the rotating sleeve, and one end of the first connecting rod is rotatably connected to the upper part of the side end of the rotating sleeve, and the other end of the first connecting rod is rotatably connected to the side end of the adjacent connecting plate. A second connecting rod is provided directly below each first connecting rod, and one end of the second connecting rod is rotatably connected to the lower part of the side end of the rotating sleeve, and the other end of the second connecting rod is rotatably connected to the adjacent connecting plate. The side end is rotatably connected, the rotating frame is arranged on the top of the mounting frame and on one side of the rotating disk, the mounting disk is horizontally arranged directly above the four connecting plates, and the mounting disk corresponds to the center position of the rotating disk, and one side of the mounting disk is rotatably connected to the top of the rotating frame, the connecting wheels are provided with four, the four connecting wheels are respectively arranged at the bottom of the mounting disk and correspond to the positions of the four connecting plates one by one, and the tops of the four connecting wheels are respectively connected to the mounting disk toward the center of the mounting disk along a straight line for sliding, and the bottom of each connecting wheel is respectively rotatably connected to the top of the connecting plate directly below; The transmission belt is sleeved on the outer sides of a plurality of connecting wheels located on both sides of the first transmission assembly and the second transmission assembly.

[0007] The locking device of claim 1, wherein the first spring is annularly fixed to the locking cam, the second spring is annularly fixed to the locking cam, the second spring is annularly fixed to the locking cam, and the third spring is anularly fixed to the locking cam. When the change rod reciprocates once, it drives the slide groove cylinder and the switching plate to rotate 180 degrees clockwise, and the end of the lock box away from the switching plate is provided with a sliding sleeve, and one end of the first connecting toothed rod is connected to the end of the pressing rod, and one end of the second connecting toothed rod passes through the sliding sleeve and is slidably connected to it, and the other end of the first connecting toothed rod and the second connecting toothed rod are located directly above the lock box. The third gear is rotatably arranged on the top of the lock box and both sides are respectively meshed with the toothed ends of the first connecting toothed rod and the second connecting toothed rod, and the first ratchet block is arranged on the side of the switching plate close to the transmission gear through a fourth spring, and the ratchet rod is horizontally arranged on the top of the mounting plate, and the first ratchet block is engaged with the ratchet teeth at one end of the ratchet rod, and the ratchet rod limits the first ratchet block to move only in the direction away from the transmission gear, and cannot move in the direction close to the transmission gear, and the stop plate is provided with two, and the two stop plates are respectively arranged at both ends of the third toothed rod, and one of the stop plates contacts the end of the second connecting toothed rod.

[0008] Preferably, the linkage device includes a first pulley, a first transmission belt, a second pulley, a second transmission belt and a connecting shaft, two first pulleys are provided, one of which is arranged at the center of the top of the mounting disk in the second transmission assembly, and the other first pulley is arranged on the output end of the driving motor, the first transmission belt is sleeved on the two first pulleys, and the connecting shaft is vertically and rotatably arranged on the top of the mounting plate, two second pulleys are provided, one of which is arranged at the center of the top of the mounting disk in the first transmission assembly, and the other second pulley is arranged at the upper end of the connecting shaft, and the second transmission belt is sleeved on the two second pulleys.

[0009] Preferably, the impact testing device includes a driving assembly and an impact head switching assembly, the driving assembly is arranged on the connecting shaft, the impact head switching assembly is arranged at the side end of the driving assembly, the driving assembly includes a driving frame, a first bevel gear, a second bevel gear, a third connecting rod, a fourth connecting rod, a fifth connecting rod and a limiting sleeve, the driving frame is arranged on one side of the connecting shaft, the first bevel gear is horizontally arranged on the connecting shaft, the second bevel gear is rotatably and vertically arranged on the upper end of the driving frame, and the first bevel gear is meshed with the second bevel gear, the limiting sleeve is arranged on one side of the driving frame, one end of the third connecting rod is coaxially connected to the second bevel gear, one end of the fourth connecting rod is rotatably connected to the other end of the third connecting rod, the fifth connecting rod vertically passes through the limiting sleeve and is slidably connected thereto up and down, and the bottom of the fifth connecting rod is rotatably connected to the other end of the fourth connecting rod.

[0010] Preferably, the impact head switching assembly includes a switching plate, a ratchet, a fifth spring, a second ratchet block, a switching member, a stop column, a stop member, a sixth spring, a fixed disk and an impact head, the switching plate is arranged on the top of the fifth connecting rod, the ratchet is rotatably arranged on the side end of the switching plate by a coil spring, the second ratchet block is rotatably arranged on the side end of the switching plate by a fifth spring and the second ratchet block is clamped in one of the ratchet grooves on the outside of the ratchet, and the ratchet is limited to rotate counterclockwise but not clockwise by the second ratchet block, the switching member is coaxially arranged with the ratchet, and the outer side of the switching member is circular and evenly provided with four protrusions, and each protrusion One end of each part is provided with a bevel, and one side of one of the horizontally arranged raised parts is provided with a stop column, the stop column is vertically arranged on the top of the mounting plate and is slidably connected thereto in a horizontal direction, the upper part of the stop column is horizontally slidably connected with a stop member through a sixth spring, and the bottom of the stop member is plane and the top is provided with a bevel, and the stop member is located above the raised part at the side end of the adjacent switching member, the fixed plate is coaxially arranged on one side of the switching member, and the outer side of the fixed plate is evenly and circularly provided with four impact heads, and the detection end area of ​​the four impact heads gradually decreases from the top one as a starting point to the remaining impact heads in a clockwise direction.

[0011] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, the device has two strength detection modes. When performing the first detection mode, through the cooperation of the intermittent transmission device, the transmission ratio adjustment device, the locking device and the linkage device, the moving speed of the impact head in the impact test device is controlled to increase by a certain amplitude at regular intervals, thereby achieving a segmented increase in the impact speed of the test piece while keeping the size of the impact contact surface between the impact head and the display screen unchanged, so as to obtain the effect of richer detection data.

[0012] In the present invention, when the second detection mode is required, the linkage device and the impact test device cooperate with each other, so that when the impact speed of the test remains unchanged, the impact contact area between the impact head and the display screen gradually decreases, so as to observe how many impacts the display screen can withstand, thereby presenting a rich and diverse detection result effect.

[0013] In the present invention, before the display screen needs to be tested for strength, a number of display screens to be tested are first stacked up and placed on the loading end of the loading device in sequence, and the movable plate is driven to move by controlling the electric push rod. With the cooperation of the loading rack, the first pulley, the first arc-shaped slide groove, the second pulley, the second arc-shaped slide groove, the supporting plate and the clamping box, the display screen is automatically loaded and automatically clamped to facilitate the strength test. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the mounting base and the sequential feeding device in the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the sequential feeding device in the present invention; Figure 4 for Figure 3 The enlarged view of point A in the middle; Figure 5 The partial structure of the sequential feeding device in the present invention is shown in FIG. Figure 1 ; Figure 6 The partial structure of the sequential feeding device in the present invention is shown in FIG. Figure 2 ; Figure 7 It is a three-dimensional structural schematic diagram of the intermittent transmission device, the transmission ratio adjustment device, the locking device, the linkage device and the impact test device in the present invention; Figure 8 It is a three-dimensional structural schematic diagram of the intermittent transmission device in the present invention; Fig. 9 It is a three-dimensional structural schematic diagram of the intermittent transmission device, the transmission ratio adjustment device and the linkage device in the present invention; Fig.10 The partial structure of the first transmission assembly in the present invention is shown in FIG. Figure 1 ; Fig.11 The partial structure of the first transmission assembly in the present invention is shown in FIG. Figure 2 ; Fig.12 It is a partial structural schematic diagram of the first transmission assembly and the transmission belt in the present invention; Fig.13 It is a schematic diagram of the three-dimensional structure of the locking device in the present invention; Fig.14 is a top view of the locking device in the present invention; Fig.15 for Fig.14 The enlarged view of point B in the middle; Fig.16 It is a partial structural schematic diagram of the locking device in the present invention; Fig.17 It is a partial structural cross-sectional view of the locking device in the present invention; Fig.18 It is a schematic diagram of the three-dimensional structure of the impact testing device in the present invention; Fig.19 It is a partial structural front view of the impact testing device of the present invention; Fig. 20 It is a partial structural cross-sectional view of the impact testing device in the present invention; Fig.21 It is a schematic diagram of the partial structure of the impact testing device in the present invention.

[0015] In the figure: 1, mounting seat; 2, mounting plate; 3, sequential feeding device; 31, electric push rod; 32, moving plate; 33, limit frame; 34, feeding frame; 35, first arc chute; 36, supporting plate; 37, second arc chute; 38, first pulley; 39, second pulley; 391, clamping box; 392, first toothed rod; 393, first spring; 394, second toothed rod; 395, first gear; 4, intermittent transmission device; 41, rotating seat; 42, toothed ring; 43, driving motor; 44, intermittent gear; 45. Sliding rod; 46. Matching gear; 47. Transmission gear; 48. Third toothed rod; 49. Fourth toothed rod; 491. Second gear; 5. Transmission ratio adjustment device; 51. First transmission assembly; 511. Mounting frame; 512. Trapezoidal block; 513. Sliding wheel; 514. Connecting column; 515. Second spring; 516. Rotating plate; 517. Rotating sleeve; 518. First connecting rod; 519. Second connecting rod; 520. Connecting plate; 521. Mounting plate; 522. Connecting wheel; 523. Rotating frame; 53. Second transmission assembly; 54, transmission belt; 6, locking device; 61, ratchet rod; 62, locking box; 63, slide groove cylinder; 64, pressing rod; 65, switching rod; 66, third spring; 67, switching plate; 68, first ratchet block; 69, fourth spring; 691, first connecting toothed rod; 692, second connecting toothed rod; 693, third gear; 694, sliding sleeve; 695, stop plate; 7, linkage device; 71, first pulley; 72, first transmission belt; 73, second pulley; 74, second transmission belt; 75. Connecting shaft; 8. Impact test device; 81. Driving assembly; 811. Driving frame; 812. First bevel gear; 813. Second bevel gear; 814. Third connecting rod; 815. Fourth connecting rod; 816. Fifth connecting rod; 817. Limit sleeve; 82. Impact head switching assembly; 820. Switching plate; 821. Ratchet; 822. Fifth spring; 823. Second ratchet block; 824. Switching member; 825. Stop column; 826. Stop member; 827. Sixth spring; 828. Fixed disk; 829. Impact head. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the present invention.

[0017] See also Figures 1 to 21 The present invention provides a technical solution: a computer display screen strength testing device, comprising: A mounting seat 1, wherein the mounting seat 1 is arranged on a horizontal plane, and a mounting plate 2 is horizontally arranged at the bottom of the mounting seat 1; Also includes: A sequential loading device 3 is provided on the top of the mounting seat 1 for loading and unloading multiple display screens for testing. An impact testing device 8 for strength testing the display screen is provided on the top of the mounting plate 2. An intermittent transmission device 4 is provided on one side of the top of the mounting plate 2. A transmission ratio adjustment device 5 is provided on one side of the intermittent transmission device 4 to cooperate with the intermittent transmission device 4 and the impact testing device 8 to realize two different detection modes for the display screen. A locking device 6 for automatically locking and unlocking the transmission ratio adjustment device 5 is provided on one side of the transmission ratio adjustment device 5. A linkage device 7 for sharing a driving source is provided on the impact testing device 8, the intermittent transmission device 4 and the transmission ratio adjustment device 5.

[0018] In this embodiment, Figures 2 to 6 As shown, the sequential loading device 3 includes an electric push rod 31, which is horizontally arranged on the top of the mounting seat 1, and a movable plate 32 is slidably connected to the top of the mounting seat 1. One side of the movable plate 32 is connected to the output end of the electric push rod 31, and two limit frames 33 are symmetrically arranged on both sides of the movable plate 32. One end of the two limit frames 33 is fixedly connected to the top of the mounting seat 1, and the other end of the two limit frames 33 is located on the outside of the mounting seat 1. Two loading racks 34 are symmetrically arranged between the two limit frames 33. The side of the two loading racks 34 close to each other is provided with limit grooves for limiting the four corners of a plurality of display screens, and the ends of the two loading racks 34 away from each other pass through the two limit frames respectively. The upper end of the inner side of 33 is connected with it for transverse sliding, the two loading racks 34 are symmetrically provided with first arc-shaped slide grooves 35, and two supporting plates 36 are symmetrically provided directly below the two loading racks 34, and the two supporting plates 36 are respectively connected with the lower end of the inner side of the two limiting racks 33 for transverse sliding, and the two supporting plates 36 are symmetrically provided with second arc-shaped slide grooves 37, and the two ends of the upper part of one side of the moving plate 32 are respectively rotatably provided with two first pulleys 38, and the two first pulleys 38 are respectively connected with the inner side of the two first arc-shaped slide grooves 35 for sliding, and the two ends of the lower part of one side of the moving plate 32 are respectively rotatably provided with two second pulleys 39, and the two second pulleys 39 are respectively connected with the inner side of the two second arc-shaped slide grooves 37 for sliding; Two clamping boxes 391 are symmetrically arranged directly below the two limit frames 33. The ends of the two clamping boxes 391 that are away from each other are respectively connected to the ends of the two loading frames 34 that are away from each other. The clamping boxes 391 are arranged in an L shape. The lower end of one side of the clamping boxes 391 is provided with a first toothed rod 392. One end of the first toothed rod 392 passes through the side end of the clamping box 391 and is located inside the clamping box 391. The other end of the first toothed rod 392 is located outside the clamping box 391. A first spring 393 is provided between one side of the slotted rod 392 located inside the clamping box 391 and the side end inside the clamping box 391. A second slotted rod 394 is horizontally provided just above the first slotted rod 392. The second slotted rod 394 passes through the side end of the clamping box 391 and is located inside the clamping box 391. A first gear 395 is rotatably provided inside the clamping box 391, and the first gear 395 is respectively meshed with the top of the first slotted rod 392 and the bottom of the second slotted rod 394. Before the display screen needs to be tested for strength, first stack several display screens to be tested up and down and place them between two loading racks 34. In the initial state, the two sides of the display screen at the bottom are respectively abutted against the tops of the two supporting plates 36, and the two sides of the display screen at the bottom are located below the two loading racks 34, and the two sides of the remaining display screens do not contact the side ends of the two loading racks 34. First, control the electric push rod 31 to drive the moving plate 32 to slide on the top of the mounting seat 1, and then drive the first pulley 38 to slide inside the first arc-shaped slide groove 35, and the second pulley 39 to slide inside the second arc-shaped slide groove 37, thereby driving the two loading racks 34 and the two clamping boxes 391 to slide synchronously in the direction close to the opposite side, and the two supporting plates 36 to slide synchronously in the direction away from the opposite side, so that the display screen at the bottom is separated from the two supporting plates 36 and falls into the two clamping boxes The two loading racks 34 clamp the outer sides of the remaining display screens to prevent them from falling down, and during the movement of the clamping box 391, as the display screen falls on the clamping box 391, the first toothed rod 392 is squeezed and slides into the clamping box 391, and the second toothed rod 394 is driven by the first gear 395 to slide from the inside of the clamping box 391 to the outside, so that the two clamping boxes 391 lock the two sides and the bottom of the display screen, and the second toothed rod 394 locks the two sides of the top of the display screen, thereby realizing the effect of automatically loading and clamping the display screen for strength testing; when the display screen detection is completed, the output end of the electric push rod 31 is controlled to reset and extend again, thereby realizing the effect of unloading the detected display screen and loading a new display screen to be detected for strength testing.

[0019] In this embodiment, Figures 7 to 21As shown, the intermittent transmission device 4 includes a rotating seat 41, a toothed ring 42, a driving motor 43, an intermittent gear 44, a sliding rod 45, a matching gear 46, a transmission gear 47, a third toothed rod 48, a fourth toothed rod 49 and a second gear 491, the rotating seat 41 is arranged on one side of the top of the mounting plate 2, the toothed ring 42 is arranged on the top of the rotating seat 41 and the toothed ring 42 is rotatably connected to the rotating seat 41, a plurality of teeth are arranged on the outer side of the toothed ring 42 and a circle of teeth are arranged on the inner side of the toothed ring 42, the driving motor 43 is arranged on the inner side of the toothed ring 42, the intermittent gear 44 is arranged on the output end of the driving motor 43, a tooth is arranged on the outer side of the intermittent gear 44 and the intermittent gear 44 is pre-engaged with the inner side of the toothed ring 42, and one side of the rotating seat 41 is vertically and rotatably arranged There is a sliding rod 45, the matching gear 46 is arranged at the upper end of the sliding rod 45 and is connected with the sliding rod 45 in an up-and-down damping sliding connection, and the matching gear 46 is pre-engaged with the teeth on the outer side of the toothed ring 42, the transmission gear 47 is rotatably arranged on the top of the mounting plate 2 and the transmission gear 47 is meshed with the matching gear 46, the third toothed rod 48 and the fourth toothed rod 49 are arranged at intervals on one side of the top of the mounting plate 2, and the third toothed rod 48 and the fourth toothed rod 49 are connected with the top of the mounting plate 2 in a horizontal sliding direction, the second gear 491 is rotatably arranged on the top of the mounting plate 2 and is located between the third toothed rod 48 and the fourth toothed rod 49, and the second gear 491 is respectively meshed with the side adjacent to the third toothed rod 48 and the fourth toothed rod 49, and the side of the third toothed rod 48 close to the transmission gear 47 is meshed with the transmission gear 47; The transmission ratio adjustment device 5 includes a first transmission assembly 51, a second transmission assembly 53 and a transmission belt 54. The first transmission assembly 51 and the second transmission assembly 53 have the same structure and are respectively arranged at the side ends of the third toothed rod 48 and the fourth toothed rod 49. The first transmission assembly 51 includes a mounting frame 511, a trapezoidal block 512, a sliding wheel 513, a connecting column 514, a second spring 515, a rotating disk 516, a rotating sleeve 517, a first connecting rod 518, a second connecting rod 519, a connecting plate 520, a mounting disk 521, a connecting wheel 522 and a rotating frame 523. The trapezoidal block 512 is arranged at the side end of the third toothed rod 48, and the trapezoidal block 512 is close to the end of the third toothed rod 48 and away from the third toothed rod 48. The height of one end of the mounting frame 511 gradually decreases, the mounting frame 511 is arranged directly above the trapezoidal block 512, the connecting column 514 vertically passes through the top of the mounting frame 511 and is slidably connected thereto up and down, the sliding wheel 513 is rotatably arranged at the bottom of the connecting column 514 and the sliding wheel 513 is located in the middle of the top of the trapezoidal block 512 and contacts it, the second spring 515 is sleeved on the outside of the connecting column 514 and the two ends of the second spring 515 are respectively connected to the mounting frame 511 and the sliding wheel 513, the rotating disk 516 is rotatably arranged on the top of the mounting frame 511, the top of the connecting column 514 passes through the center of the rotating disk 516 and does not contact it, the rotating sleeve 517 is rotatably arranged on the upper end of the connecting column 514, and the connecting plate There are four connecting plates 520, which are evenly distributed on the four sides of the top of the rotating disk 516, and the bottom of the connecting plate 520 is connected to the rotating disk 516 by sliding along a straight line toward the center of the rotating disk 516. There are four first connecting rods 518 and second connecting rods 519, which are evenly distributed on the four sides of the rotating sleeve 517, and one end of the first connecting rod 518 is rotatably connected to the upper part of the side end of the rotating sleeve 517, and the other end of the first connecting rod 518 is rotatably connected to the side end of the adjacent connecting plate 520. A second connecting rod 519 is provided directly below each first connecting rod 518, and one end of the second connecting rod 519 is rotatably connected to the lower part of the side end of the rotating sleeve 517, and the other end of the second connecting rod 519 is rotatably connected to the adjacent connecting plate 520. The side end of the plate 520 is rotatably connected, the rotating frame 523 is arranged on the top of the mounting frame 511 and is located on one side of the rotating disk 516, the mounting disk 521 is horizontally arranged directly above the four connecting plates 520, and the mounting disk 521 corresponds to the center position of the rotating disk 516, and one side of the mounting disk 521 is rotatably connected to the top of the rotating frame 523, the connecting wheels 522 are provided with four, the four connecting wheels 522 are respectively arranged at the bottom of the mounting disk 521 and correspond to the positions of the four connecting plates 520 one by one, and the tops of the four connecting wheels 522 are respectively connected to the mounting disk 521 along a straight line slidingly toward the center of the mounting disk 521, and the bottom of each connecting wheel 522 is respectively rotatably connected to the top of the connecting plate 520 located directly below; The transmission belt 54 is sleeved on the outer sides of a plurality of connecting wheels 522 located on both sides of the first transmission assembly 51 and the second transmission assembly 53; The locking device 6 includes a ratchet rod 61, a locking box 62, a slide groove cylinder 63, a pressing rod 64, a switching rod 65, a third spring 66, a switching disk 67, a first ratchet block 68, a fourth spring 69, a first connecting tooth groove rod 691, a second connecting tooth groove rod 692, a third gear 693, a sliding sleeve 694 and a stop plate 695. The locking box 62 is horizontally arranged on the top of one end of the third tooth groove rod 48 close to the transmission gear 47, the slide groove cylinder 63 is rotatably arranged at one end inside the locking box 62, and the switching disk 67 is arranged at one end of the locking box 62 and the switching disk 67 is connected to one end of the slide groove cylinder 63. The locking cam 63 is connected to the locking cam 62 by a third spring 66, and one end of the pressing rod 64 passes through the switching disk 67 and the center of the sliding groove cylinder 63 and is slidably connected thereto. The switching rod 65 is provided with a third spring 66 between one end of the switching rod 65 located inside the locking box 62 and the bottom of the inner side of the locking box 62. The switching rod 65 is arranged outside one side of the locking box 62 and the two ends of the switching rod 65 pass through the side ends of the locking box respectively. The side ends of the locking box 62 are provided with openings that facilitate the switching rod 65 to move up and down. One end of the switching rod 65 is connected to one end of the pressing rod 64 located inside the locking box 62, and the other end of the switching rod 65 is clamped in the sliding groove of the sliding groove cylinder 63. When the locking cam 63 is in the locking cam 62, the locking cam 63 is locked. When the locking cam 63 is locked ... When the switching rod 65 reciprocates once, it drives the slide groove cylinder 63 and the switching disk 67 to rotate 180 degrees clockwise. The end of the locking box 62 away from the switching disk 67 is provided with a sliding sleeve 694. One end of the first connecting toothed rod 691 is connected to the end of the pressing rod 64, and one end of the second connecting toothed rod 692 passes through the sliding sleeve 694 and is slidably connected thereto. The other ends of the first connecting toothed rod 691 and the second connecting toothed rod 692 are located directly above the locking box 62. The third gear 693 is rotatably arranged on the top of the locking box 62 and is respectively connected to the first connecting toothed rod 691 and the second connecting toothed rod 692 on both sides. The first ratchet block 68 is arranged on the side of the switching plate 67 close to the transmission gear 47 through the fourth spring 69, and the ratchet rod 61 is horizontally arranged on the top of the mounting plate 2. The first ratchet block 68 is engaged with the ratchet at one end of the ratchet rod 61, and the ratchet rod 61 limits the first ratchet block 68 to move only in the direction away from the transmission gear 47, and cannot move in the direction close to the transmission gear 47. There are two stop plates 695, which are respectively arranged at the two ends of the third toothed rod 48, and one of the stop plates 695 contacts the end of the second connecting toothed rod 692; The linkage device 7 includes a first pulley 71, a first transmission belt 72, a second pulley 73, a second transmission belt 74 and a connecting shaft 75. The first pulley 71 is provided with two, one of which is arranged at the center of the top of the mounting disk 521 in the second transmission assembly 53, and the other first pulley 71 is arranged on the output end of the driving motor 43. The first transmission belt 72 is sleeved on the two first pulleys 71. The connecting shaft 75 is vertically and rotatably arranged on the top of the mounting plate 2. The second pulley 73 is provided with two, one of which is arranged at the center of the top of the mounting disk 521 in the first transmission assembly 51, and the other second pulley 73 is arranged at the upper end of the connecting shaft 75. The second transmission belt 74 is sleeved on the two second pulleys 73. The impact test device 8 includes a driving component 81 and an impact head switching component 82, wherein the driving component 81 is arranged on the connecting shaft 75, and the impact head switching component 82 is arranged on the side end of the driving component 81, and the driving component 81 includes a driving frame 811, a first bevel gear 812, a second bevel gear 813, a third connecting rod 814, a fourth connecting rod 815, a fifth connecting rod 816 and a limiting sleeve 817, wherein the driving frame 811 is arranged on one side of the connecting shaft 75, and the first bevel gear 812 is horizontally arranged on the connecting shaft 75. The second bevel gear 813 is rotatable and vertically arranged at the upper end of the driving frame 811, and the first bevel gear 812 is meshed with the second bevel gear 813, the limiting sleeve 817 is arranged on one side of the driving frame 811, one end of the third connecting rod 814 is coaxially connected to the second bevel gear 813, one end of the fourth connecting rod 815 is rotatably connected to the other end of the third connecting rod 814, the fifth connecting rod 816 vertically passes through the limiting sleeve 817 and is slidably connected thereto up and down, and the bottom of the fifth connecting rod 816 is rotatably connected to the other end of the fourth connecting rod 815; The impact head switching assembly 82 includes a switching plate 820, a ratchet 821, a fifth spring 822, a second ratchet block 823, a switching member 824, a stop column 825, a stop member 826, a sixth spring 827, a fixed plate 828 and an impact head 829. The switching plate 820 is arranged on the top of the fifth connecting rod 816, and the ratchet 821 is rotatably arranged on the side end of the switching plate 820 through a coil spring. The second ratchet block 823 is rotatably arranged on the side end of the switching plate 820 through the fifth spring 822, and the second ratchet block 823 is clamped in one of the ratchet grooves on the outer side of the ratchet 821, and the ratchet 821 is limited to rotate counterclockwise and cannot rotate clockwise by the second ratchet block 823. The switching member 824 is coaxially arranged with the ratchet 821, and the outer side of the switching member 824 is circular and evenly arranged. There are four protrusions, and one end of each protrusion is provided with a bevel, and one side of one of the horizontally arranged protrusions is provided with a stop column 825, the stop column 825 is vertically arranged on the top of the mounting plate 2 and is slidably connected thereto in the horizontal direction, the upper part of the stop column 825 is slidably connected to a stop member 826 in the horizontal direction through a sixth spring 827, and the bottom of the stop member 826 is flat and the top is provided with a bevel, and the stop member 826 is located above the protrusion at the side end of the adjacent switching member 824, the fixed plate 828 is coaxially arranged on one side of the switching member 824, and the outer side of the fixed plate 828 is evenly and circularly provided with four impact heads 829, and the detection end area of ​​the four impact heads 829 gradually decreases from the one located at the top as the starting point to the remaining impact heads 829 in the clockwise direction; The device has two strength detection modes. When performing the first detection mode, first in the initial state, the stopper 826 is away from the protrusion at the side end of the switching member 824, and the matching gear 46 is pre-engaged with the teeth on the outer side of the toothed ring 42 at the upper part of the sliding rod 45, and the transmission belt 54 is in a state where both ends are flush. First, the drive motor 43 is controlled to work, and the mounting disk 521 in the second transmission assembly 53 is driven to rotate under the transmission of the first pulley 71 and the first transmission belt 72, and the mounting disk 521 in the first transmission assembly 51 is driven to rotate under the transmission of the transmission belt 54. Under the transmission of the second pulley 73 and the second transmission belt 74, the connecting shaft 75 is driven to rotate, thereby driving the first bevel gear 812 and the second bevel gear 814 to rotate. The wheel 813 rotates, and then under the transmission of the third connecting rod 814 and the fourth connecting rod 815, the fifth connecting rod 816 is driven to slide up and down along the limiting sleeve 817, thereby driving the impact head 829 on the top of the fixed plate 828 to reciprocate and impact the display surface of the display screen, thereby realizing the strength detection of the display screen through the impact action. As the driving motor 43 continues to work, the intermittent gear 44 is driven to perform circular motion. Every time the intermittent gear 44 rotates one circle, it drives the toothed ring 42 to rotate a certain angle. When the toothed ring 42 rotates a certain angle, it meshes with the matching gear 46 and drives it to rotate a certain angle and disengage, thereby driving the transmission gear 47 to rotate a certain angle, thereby driving the third toothed rod 48 to approach the mounting plate. 521, and then the fourth toothed rod 49 is driven by the second gear 491 to slide a certain distance in the direction away from the mounting plate 521 and then stop. With the sliding of the third toothed rod 48, the connecting column 514 in the first transmission assembly 51 rises, the second spring 515 extends, and then the rotating sleeve 517 is driven to rise. Under the transmission of the first connecting rod 518 and the second connecting rod 519, the four connecting plates 520 are driven to slide synchronously in the direction close to the center of the rotating disk 516, and then the four connecting wheels 522 are driven to slide synchronously. The running direction of the second transmission assembly 53 is opposite to that of the first transmission assembly 51. The four connecting wheels 522 in the second transmission assembly 53 are synchronously moved away from the mounting plate 521. The transmission belt 54 slides in the direction of the center of the circle, thereby driving the diameter of the end of the transmission belt 54 close to the first transmission component 51 to gradually decrease, while the diameter of the end of the transmission belt 54 close to the second transmission component 53 to gradually increase, thereby achieving the situation where the rotation speed of the mounting disk 521 in the second transmission component 53 remains unchanged, and the rotation speed of the mounting disk 521 in the first transmission component 51 is accelerated, thereby increasing the speed of the up and down reciprocating movement of the impact head 829, and with the continuous rotation of the intermittent gear 44, the movement speed of the impact head 829 will increase by a certain degree at regular intervals, thereby achieving the situation where the size of the impact contact surface between the impact head 829 and the display screen remains unchanged. The impact speed of the test piece is increased in stages, so as to obtain a richer detection data effect.

[0020] As the third toothed rod 48 moves, in order to avoid the instability of the third toothed rod 48 during the operation of each component, which may cause the transmission ratio of the transmission belt 54 to fail, a first ratchet block 68 is set on the top of the third toothed rod 48. As the third toothed rod 48 moves, the first ratchet block 68 moves synchronously along the ratchet rod 61 and is embedded in the ratchet teeth of the ratchet rod 61. It can only move in the direction close to the first transmission component 51 and cannot move in the opposite direction, thereby ensuring the stability of the third toothed rod 48 during movement. When the third toothed rod 48 moves to the maximum moving distance, it means that the strength test of the display screen is completed. At this time, the first connecting toothed rod 691 at the end of the locking box 62 contacts the adjacent stop plate 695, driving the pressing rod 64 to slide into the locking box 62 and quickly reset under the action of the third spring 66, thereby Under the action of the outer groove of the groove cylinder 63, the switching disk 67 is driven to rotate 180 degrees clockwise, thereby driving the first ratchet block 68 to disengage from the ratchet rod 61, thereby releasing the locking effect of the third toothed rod 48, and then under the action of the second spring 515 in the first transmission assembly 51 and the second transmission assembly 53, the third toothed rod 48 and the fourth toothed rod 49 are driven to quickly reset, thereby restoring the shape of the transmission belt 54 to its initial state for subsequent detection work, and at this time, the second connecting toothed rod 692 at the other end of the locking box 62 contacts with another stop plate 695, and under the action of the third gear 693, the pressing rod 64 is driven to slide back and forth again, thereby driving the first ratchet block 68 to rotate 180 degrees clockwise again to reset to its initial position and engage with the ratchet rod 61 again for subsequent detection work.

[0021] When the second detection mode is required, first slide the matching gear 46 downward to keep it away from the toothed ring 42 and the transmission gear 47, then push the stop column 825 close to the switching member 824, so that the stop member 826 is located just above a protrusion adjacent to the switching member 824, then control the drive motor 43 to work, control the fifth connecting rod 816 to perform a uniform up and down reciprocating motion, when the fifth connecting rod 816 drives the fixed plate 828 to rise, first the protrusion at the side end of the switching member 824 contacts the stop member 826, and the stop member 82 6 does not move, and the switching member 824 is driven to rotate counterclockwise under the action of the stop member 826, and the switching member 824 is driven to rotate 90 degrees under the action of the ratchet 821 and the second ratchet block 823. As the switching member 824 drives the fixed plate 828 to rotate together, the impact head 829 located at the top is the one with the largest area. After hitting the display screen once, the fixed plate 828 descends. During the descent, the bottom of the raised part at the side end of the switching member 824 contacts the top inclined surface of the stop member 826, pushing the stop member 826 toward the stop column 825 is squeezed inside, and the sixth spring 827 contracts, thereby ensuring that the fixed disk 828 does not rotate and smoothly descends, and then the fixed disk 828 rises again. At this time, the stopper 826 has been reset under the action of the sixth spring 827, and then the fixed disk 828 is controlled to rotate 90 degrees counterclockwise again, so that the impact head 829 at the top at this time is switched to a smaller one, and the display screen is impacted for the second time, and the cycle is repeated. With each reciprocating movement of the fixed disk 828, the area of ​​the impact head 829 that impacts the display screen will be reduced accordingly, thereby achieving that when the impact speed of the test remains unchanged, the impact contact area between the impact head 829 and the display screen is gradually reduced, so as to observe how many times the display screen can withstand impacts, thereby presenting a rich and diverse detection result effect; when the detection is completed, the second ratchet block 823 is disengaged from the ratchet 821, and the ratchet 821 is automatically reset to the initial state under the action of the coil spring, thereby driving the plurality of impact heads 829 on the fixed disk 828 to reset to the initial position, so as to facilitate subsequent detection work.

[0022] The above shows and describes the basic principles, main features and advantages of the present invention. Technical personnel in this industry should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A computer display screen strength testing device, comprising: A mounting seat (1), the mounting seat (1) being arranged on a horizontal plane, and a mounting plate (2) being arranged horizontally at the bottom of the mounting seat (1); It is characterized by further comprising: A sequential loading device (3), the top of the mounting seat (1) is provided with a sequential loading device (3) for loading and unloading multiple display screens for testing, the top of the mounting plate (2) is provided with an impact test device (8) for performing strength testing on the display screen, one side of the top of the mounting plate (2) is provided with an intermittent transmission device (4), one side of the intermittent transmission device (4) is provided with a transmission ratio adjustment device (5) for cooperating with the intermittent transmission device (4) and the impact test device (8) to realize two different detection modes for the display screen, one side of the transmission ratio adjustment device (5) is provided with a locking device (6) for automatically locking and unlocking the transmission ratio adjustment device (5), and the impact test device (8), the intermittent transmission device (4) and the transmission ratio adjustment device (5) are provided with a linkage device (7) for facilitating sharing of a driving source.

2. A computer display screen strength testing device according to claim 1, characterized in that: The sequential loading device (3) comprises an electric push rod (31), the electric push rod (31) being horizontally arranged on the top of the mounting seat (1), the top of the mounting seat (1) being slidably connected to a moving plate (32), one side of the moving plate (32) being connected to the output end of the electric push rod (31), two limiting frames (33) being symmetrically arranged on both sides of the moving plate (32), one end of the two limiting frames (33) being fixedly connected to the top of the mounting seat (1), the other ends of the two limiting frames (33) being located outside the mounting seat (1), two loading frames (34) being symmetrically arranged between the two limiting frames (33), the sides of the two loading frames (34) being close to each other being provided with limiting grooves for limiting the four corners of the plurality of display screens, and the ends of the two loading frames (34) being far away from each other respectively passing through the two limiting frames ( The upper end of the inner side of the movable plate (32) is connected to the movable plate (33) in a transverse sliding manner, the two loading racks (34) are symmetrically provided with first arc-shaped slide grooves (35), two supporting plates (36) are symmetrically provided directly below the two loading racks (34), and the two supporting plates (36) are respectively connected to the lower end of the inner side of the two limiting racks (33) in a transverse sliding manner, and the two supporting plates (36) are symmetrically provided with second arc-shaped slide grooves (37), two first pulleys (38) are respectively rotatably provided at both ends of the upper part of one side of the movable plate (32), and the two first pulleys (38) are respectively connected to the inner side of the two first arc-shaped slide grooves (35) in a sliding manner, and two second pulleys (39) are respectively connected to the inner side of the two second arc-shaped slide grooves (37) in a sliding manner; Two clamping boxes (391) are symmetrically arranged directly below the two limit frames (33), and the ends of the two clamping boxes (391) that are away from each other are respectively connected to the ends of the two loading frames (34) that are away from each other, and the clamping boxes (391) are arranged in an L shape. A first toothed rod (392) is arranged at the lower end of one side of the clamping box (391), and one end of the first toothed rod (392) passes through the side end of the clamping box (391) and is located inside the clamping box (391), and the other end of the first toothed rod (392) is located outside the clamping box (391). The first toothed rod A first spring (393) is provided between one side of (392) located inside the clamping box (391) and the side end inside the clamping box (391); a second toothed rod (394) is horizontally provided directly above the first toothed rod (392); the second toothed rod (394) passes through the side end of the clamping box (391) and is located inside the clamping box (391); a first gear (395) is rotatably provided inside the clamping box (391), and the first gear (395) is respectively engaged with the top of the first toothed rod (392) and the bottom of the second toothed rod (394).

3. A computer display screen strength testing device according to claim 2, characterized in that: The intermittent transmission device (4) comprises a rotating seat (41), a toothed ring (42), a driving motor (43), an intermittent gear (44), a sliding rod (45), a matching gear (46), a transmission gear (47), a third toothed rod (48), a fourth toothed rod (49) and a second gear (491); the rotating seat (41) is arranged on one side of the top of the mounting plate (2); the toothed ring (42) is arranged on the top of the rotating seat (41) and the toothed ring (42) is rotatably connected to the rotating seat (41); a plurality of teeth are arranged on the outer side of the toothed ring (42) and a circle of teeth are arranged on the inner side of the toothed ring (42); the driving motor (43) is arranged on the inner side of the toothed ring (42); the intermittent gear (44) is arranged on the output end of the driving motor (43); a tooth is arranged on the outer side of the intermittent gear (44) and the intermittent gear (44) is pre-engaged with the inner side of the toothed ring (42); one side of the rotating seat (41) is vertically and rotatably arranged A sliding rod (45) is provided, the mating gear (46) is arranged at the upper end of the sliding rod (45) and is connected to the sliding rod in a damping sliding manner, and the mating gear (46) is pre-engaged with the teeth on the outer side of the toothed ring (42), the transmission gear (47) is rotatably arranged on the top of the mounting plate (2) and the transmission gear (47) is meshed with the mating gear (46), the third toothed rod (48) and the fourth toothed rod (49) are arranged at intervals on one side of the top of the mounting plate (2), and the third toothed rod The third toothed rod (48) and the fourth toothed rod (49) are connected to the top of the mounting plate (2) in a sliding manner in the horizontal direction. The second gear (491) is rotatably arranged on the top of the mounting plate (2) and is located between the third toothed rod (48) and the fourth toothed rod (49). The second gear (491) is respectively meshed with one side adjacent to the third toothed rod (48) and the fourth toothed rod (49). The side of the third toothed rod (48) close to the transmission gear (47) is meshed with the transmission gear (47).

4. A computer display screen strength testing device according to claim 3, characterized in that: The transmission ratio adjustment device (5) comprises a first transmission assembly (51), a second transmission assembly (53) and a transmission belt (54); the first transmission assembly (51) and the second transmission assembly (53) have the same structure and are respectively arranged at the side ends of the third toothed rod (48) and the fourth toothed rod (49); the first transmission assembly (51) comprises a mounting frame (511), a trapezoidal block (512), a sliding wheel (513), a connecting column (514), a second spring (515), a rotating disk (516), a rotating sleeve (517), a first connecting rod (518), a second connecting rod (519), a connecting plate (520), a mounting disk (521), a connecting wheel (522) and a rotating frame (523); the trapezoidal block (512) is arranged on the side ends of the third toothed rod (48) and the fourth toothed rod (49); The side end of the third toothed rod (48), and the height of the trapezoidal block (512) gradually decreases from one end close to the third toothed rod (48) to one end away from the third toothed rod (48), the mounting frame (511) is arranged directly above the trapezoidal block (512), the connecting column (514) vertically passes through the top of the mounting frame (511) and is slidably connected thereto up and down, the sliding wheel (513) is rotatably arranged at the bottom of the connecting column (514), and the sliding wheel (513) is located in the middle of the top of the trapezoidal block (512) and contacts therewith, the second spring (515) is sleeved on the outside of the connecting column (514), and the two ends of the second spring (515) are respectively connected to the mounting frame (511) and the sliding wheel (513), and the rotating disk (516) is rotatably arranged The connecting rod (514) is disposed on the top of the mounting frame (511), the top of the connecting rod (514) passes through the center of the rotating disk (516) without contacting it, the rotating sleeve (517) is rotatably disposed on the upper end of the connecting rod (514), four connecting plates (520) are provided, the four connecting plates (520) are evenly distributed on the four sides of the top of the rotating disk (516), and the bottom of the connecting plate (520) is slidably connected to the rotating disk (516) along a straight line toward the center of the rotating disk (516), the first connecting rod (518) and the second connecting rod (519) are provided in four pieces, the four first connecting rods (518) are evenly distributed on the four sides of the rotating sleeve (517), one end of the first connecting rod (518) is rotatably connected to the upper part of the side end of the rotating sleeve (517), and the first connecting rod (519) is provided in four pieces. The other end of a connecting rod (518) is rotatably connected to the side end of an adjacent connecting plate (520); a second connecting rod (519) is provided directly below each first connecting rod (518); one end of the second connecting rod (519) is rotatably connected to the lower part of the side end of the rotating sleeve (517); and the other end of the second connecting rod (519) is rotatably connected to the side end of an adjacent connecting plate (520); the rotating frame (523) is arranged on the top of the mounting frame (511) and is located on one side of the rotating disk (516); the mounting disk (521) is horizontally arranged directly above the four connecting plates (520); the mounting disk (521) corresponds to the center position of the rotating disk (516); and one side of the mounting disk (521) is rotatably connected to the top of the rotating frame (523);There are four connecting wheels (522), which are respectively arranged at the bottom of the mounting plate (521) and correspond to the positions of the four connecting plates (520) one by one, and the tops of the four connecting wheels (522) are respectively connected to the mounting plate (521) in a sliding manner along a straight line toward the center of the mounting plate (521), and the bottom of each connecting wheel (522) is respectively connected to the top of the connecting plate (520) located directly below in a rotatable manner; The transmission belt (54) is sleeved on the outside of a plurality of connecting wheels (522) located on both sides of the first transmission assembly (51) and the second transmission assembly (53).

5. A computer display screen strength testing device according to claim 4, characterized in that: The locking device (6) comprises a ratchet rod (61), a locking box (62), a slide groove cylinder (63), a pressing rod (64), a switching rod (65), a third spring (66), a switching disk (67), a first ratchet block (68), a fourth spring (69), a first connecting toothed rod (691), a second connecting toothed rod (692), a third gear (693), a sliding sleeve (694) and a stop plate (695), wherein the locking box (62) is horizontally arranged at the top of one end of the third toothed rod (48) close to the transmission gear (47), the slide groove cylinder (63) is rotatably arranged at one end inside the locking box (62), the switching disk (67) is arranged at one end of the locking box (62) and the switching disk (67) The switch rod (65) is connected to one end of the slide groove cylinder (63), one end of the pressing rod (64) passes through the switching disk (67) and the center of the slide groove cylinder (63) and is slidably connected thereto, a third spring (66) is provided between one end of the switch rod (65) located inside the locking box (62) and the bottom of the inner side of the locking box (62), the switch rod (65) is arranged outside one side of the locking box (62) and the two ends of the switch rod (65) respectively pass through the side ends of the locking box, and the side end of the locking box (62) is provided with an opening for facilitating the upward and downward movement of the switch rod (65), one end of the switch rod (65) is connected to one end of the pressing rod (64) located inside the locking box (62), and the other end of the switch rod (65) is clamped with the slide groove cylinder (63) ), when the switching rod (65) reciprocates once, the sliding groove cylinder (63) and the switching disk (67) are driven to rotate 180 degrees clockwise, and the end of the locking box (62) away from the switching disk (67) is provided with a sliding sleeve (694), one end of the first connecting toothed rod (691) is connected to the end of the pressing rod (64), and one end of the second connecting toothed rod (692) passes through the sliding sleeve (694) and is slidably connected thereto, and the other ends of the first connecting toothed rod (691) and the second connecting toothed rod (692) are located directly above the locking box (62), and the third gear (693) is rotatably arranged at the top of the locking box (62) and is respectively connected to the first connecting toothed rod (691) and the second connecting toothed rod on both sides. The first ratchet block (68) is arranged on a side of the switching disk (67) close to the transmission gear (47) through a fourth spring (69), the ratchet rod (61) is horizontally arranged on the top of the mounting plate (2), the first ratchet block (68) is engaged with the ratchet at one end of the ratchet rod (61), and the ratchet rod (61) limits the first ratchet block (68) to move only in a direction away from the transmission gear (47) and cannot move in a direction close to the transmission gear (47), and two stop plates (695) are provided, and the two stop plates (695) are respectively arranged at two ends of the third toothed rod (48), and one of the stop plates (695) contacts the end of the second connecting toothed rod (692).

6. A computer display screen strength testing device according to claim 5, characterized in that: The linkage device (7) comprises a first pulley (71), a first transmission belt (72), a second pulley (73), a second transmission belt (74) and a connecting shaft (75); two first pulleys (71) are provided, one of which is arranged at the center of a top of a mounting disk (521) in the second transmission assembly (53); the other first pulley (71) is arranged on the output end of the drive motor (43); the first transmission belt (72) is sleeved on the two first pulleys (71); the connecting shaft (75) is vertically and rotatably arranged on the top of the mounting plate (2); two second pulleys (73) are provided, one of which is arranged at the center of a top of a mounting disk (521) in the first transmission assembly (51); the other second pulley (73) is arranged at the upper end of the connecting shaft (75); and the second transmission belt (74) is sleeved on the two second pulleys (73).

7. A computer display screen strength testing device according to claim 6, characterized in that: The impact test device (8) comprises a driving assembly (81) and an impact head switching assembly (82), wherein the driving assembly (81) is arranged on a connecting shaft (75), and the impact head switching assembly (82) is arranged at a side end of the driving assembly (81), and the driving assembly (81) comprises a driving frame (811), a first bevel gear (812), a second bevel gear (813), a third connecting rod (814), a fourth connecting rod (815), a fifth connecting rod (816) and a limiting sleeve (817), wherein the driving frame (811) is arranged on one side of the connecting shaft (75), and the first bevel gear (812) is arranged horizontally on the connecting shaft (7 5), the second bevel gear (813) is rotatably and vertically arranged at the upper end of the driving frame (811), and the first bevel gear (812) is meshed with the second bevel gear (813), the limiting sleeve (817) is arranged on one side of the driving frame (811), one end of the third connecting rod (814) is coaxially connected to the second bevel gear (813), one end of the fourth connecting rod (815) is rotatably connected to the other end of the third connecting rod (814), the fifth connecting rod (816) vertically passes through the limiting sleeve (817) and is slidably connected thereto up and down, and the bottom of the fifth connecting rod (816) is rotatably connected to the other end of the fourth connecting rod (815).

8. A computer display screen strength testing device according to claim 7, characterized in that: The impact head switching assembly (82) comprises a switching plate (820), a ratchet (821), a fifth spring (822), a second ratchet block (823), a switching member (824), a stop column (825), a stop member (826), a sixth spring (827), a fixed disk (828) and an impact head (829), wherein the switching plate (820) is arranged on the top of the fifth connecting rod (816), the ratchet (821) is rotatably arranged on the side end of the switching plate (820) by means of a coil spring, the second ratchet block (823) is rotatably arranged on the side end of the switching plate (820) by means of the fifth spring (822) and the second ratchet block (823) is clamped in one of the ratchet grooves on the outside of the ratchet (821), and the ratchet (821) is restricted by the second ratchet block (823) to be able to rotate counterclockwise but not clockwise, the switching member (824) is coaxially arranged with the ratchet (821), and the switching member (824) is ) is evenly arranged on the outer side of the switching member (824) in a circular shape, and one end of each of the protrusions is provided with a bevel, and one side of one of the horizontally arranged protrusions is provided with a stop column (825), the stop column (825) is vertically arranged on the top of the mounting plate (2) and is slidably connected thereto in a horizontal direction, the upper part of the stop column (825) is slidably connected to a stop member (826) in a horizontal direction via a sixth spring (827), and the bottom of the stop member (826) is arranged in a plane and the top is provided with a bevel, and the stop member (826) is located above the protrusion at the side end of the adjacent switching member (824), the fixed plate (828) is coaxially arranged on one side of the switching member (824), and the outer side of the fixed plate (828) is evenly arranged in a circular shape, and the detection end area of ​​the four impact heads (829) gradually decreases from the one located at the top as a starting point to the remaining impact heads (829) in a clockwise direction.

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