Compression resistance detection device for liquid crystal display screen production

Abstract

The invention discloses a pressure resistance detection device for liquid crystal display screen production, which comprises a bottom plate, a driving part is arranged on the bottom plate, a rotating part which is driven by the driving part to horizontally move and rotate is arranged on the driving part, and a pressing part which is used for pressing a display screen placed on the bottom plate is arranged on the rotating part; according to the device, through a mechanical linkage mechanism of the pressing piece and the resetting piece, accurate control over the pressing and resetting processes is achieved, during pressing, the arc face of the pressing block extrudes the limiting plate, the telescopic rod is triggered to stretch, and in combination with air pressure thrust of the closed cavity, the inserting rod rotates by 90 degrees and then moves downwards to press the display screen; the J-shaped reset plate forces the insertion rod to move upwards through the thrust of the inclined plane, the spiral groove reversely guides to restore the posture of the rectangular plate, the spring force of the telescopic rod is matched for relocking, extra power is not needed in the process, action switching is achieved through a pure mechanical structure, the detection force uniformity and the reset precision are guaranteed, and the reliability of the device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of display production equipment, and specifically to a compressive strength detection device for liquid crystal display production. Background Art

[0002] A liquid crystal display mainly consists of core components such as a liquid crystal panel and a backlight module. Its working principle is to stimulate liquid crystal molecules with an electric current, causing them to arrange and combine to form various dots, lines, and surfaces, and cooperate with the backlight tubes to present a clear image. In the production process of liquid crystal displays, compressive strength detection is an essential key process. It mainly targets the liquid crystal panel and its components, simulating the external pressures that may be encountered in various stages such as production, transportation, and use to test the reliability of the product structure and the stability of its performance. During specific detection, precise pressure equipment such as pneumatic cylinders and pressing heads is used to evenly apply pressure to the panel surface. The detection personnel will carefully observe whether the panel is cracked, whether there is liquid leakage in the liquid crystal layer, and whether there are abnormalities in the displayed image, etc., and then judge whether the product meets the standards. Passing the compressive strength detection can not only promptly identify potential defects in the production process but also highly restore the actual usage scenarios of users. By avoiding product damage caused by external forces in advance, it can effectively reduce after-sales maintenance costs and plays an irreplaceable role in improving the overall quality of liquid crystal displays and enhancing market competitiveness.

[0003] Existing compressive strength detection devices mostly use active driving methods such as electric push rods and cylinders to control the movement of the pressing member, and additional power systems such as motors and air pumps need to be configured, resulting in a complex overall structure, large space occupation, high energy consumption during operation, and increased long-term use costs. At the same time, in the power transmission link, components such as belts and couplings are prone to generating gaps due to wear, affecting the accuracy of the pressing position. Summary of the Invention

[0004] The purpose of the present invention is to provide a compressive strength detection device for liquid crystal display production to solve the problems that existing compressive strength detection devices mostly use active driving methods such as electric push rods and cylinders to control the movement of the pressing member, and additional power systems such as motors and air pumps need to be configured, resulting in a complex overall structure, large space occupation, high energy consumption during operation, increased long-term use costs, and at the same time, in the power transmission link, components such as belts and couplings are prone to generating gaps due to wear, affecting the accuracy of the pressing position.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A compressive strength detection device for liquid crystal display production, comprising: a bottom plate, a driving member is arranged on the bottom plate, a rotating member is arranged on the driving member and moves horizontally and rotates along with the driving of the driving member, and a pressing member for pressing the display placed on the bottom plate is arranged on the rotating member; The rotating member includes a connecting cylinder fixedly connected to the driving member. One end of the connecting cylinder is rotatably connected to a limiting ring, and one end of the limiting ring is rotatably connected to a mounting cylinder. The cavity formed by the connecting cylinder, the limiting ring, and the mounting cylinder is filled with gas. A linkage rod is fixedly connected to the outer side of the connecting cylinder, and one end of the linkage rod is fixedly connected to the mounting cylinder. The pressing member includes a connecting rod fixedly connected to the driving member. An expansion rod is fixedly connected to the outer circumferential surface of the connecting rod. One end of the expansion rod is fixedly connected to a limiting plate. An insertion rod is arranged in the insertion cylinder, and an adjustment groove is formed on the outer side of the insertion rod. A pressing block is fixedly connected to the inner wall of the limiting ring. Wherein, during the process that the driving member drives the rotating member to move horizontally and rotate, the limiting plate at one end of the contracted expansion rod abuts against the outer contour of the pressing block, causing the expansion rod to extend and lose the restriction of the limiting plate. And under the action of the air pressure in the rotating member, the insertion rod is pushed to move outward. At the same time, under the guidance of the adjustment groove, the insertion rod rotates, passes through from the limiting plate until the bottom end of the insertion rod presses against the display screen.

[0006] As a further scheme of the present invention: An insertion cylinder is fixedly connected to the outer side of the mounting cylinder. A jack is formed through the bottom end of the insertion cylinder, and a sliding block is fixedly connected to the inner wall of the jack. One end of the insertion rod penetrates through the jack, and the sliding block is slidably connected to the adjustment groove.

[0007] As a further scheme of the present invention: A rotating ring is arranged through the mounting cylinder, and the rotating ring is rotatably connected to the mounting cylinder. One end of the insertion rod penetrates through the rotating ring and the jack in sequence.

[0008] As a further scheme of the present invention: An avoidance groove is formed on the linkage rod, and the avoidance groove is arranged above the limiting ring. Multiple groups of the connecting cylinder, the limiting ring, and the mounting cylinder are provided, and multiple groups of the connecting cylinder and the mounting cylinder are connected by the linkage rod and rotate synchronously.

[0009] As a further scheme of the present invention: A reset member for resetting the display screen after pressing is arranged on the driving member, and a locking member for restricting partial rotation of the rotating member is arranged on the rotating member.

[0010] As a further scheme of the present invention: The driving member includes a linear driver fixedly connected to the bottom plate. A connecting block is fixedly connected to the movable end of the linear driver. A connecting shaft is rotatably connected to the side end of the connecting block. One end of the connecting shaft is fixedly connected to a gear, and one end of the gear is fixedly connected to the end face of a group of connecting cylinders.

[0011] As a further scheme of the present invention: A toothed plate is fixedly connected to the top end of the bottom plate, and the toothed plate is meshed with the gear. A limiting plate is fixedly connected to the bottom plate.

[0012] As a further solution of the present invention: The reset member includes a mounting rod fixedly connected to one end of the connecting block. One end of the mounting rod is fixedly connected with a connecting plate, and one end of the connecting plate is fixedly connected with a reset plate.

[0013] As a further solution of the present invention: The locking member includes a fixed rod fixedly connected to the connecting plate. One end of the fixed rod is slidably inserted with a push rod. One end of the push rod is fixedly connected with a locking block, and a return spring is sleeved outside the push rod.

[0014] As a further solution of the present invention: A locking groove is formed on the outer side of the limiting ring. The locking block is slidably inserted into the locking groove. A clamping groove is formed on the side end of the locking block, and the clamping groove is adapted to the locking groove.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In the present invention, through the combined motion design of the driving member and the rotating member, the device can realize the coordinated actions of horizontal movement and rotation. The linear driver of the driving member pushes the connecting block to move linearly through the screw-nut mechanism, drives the gear to mesh with the toothed plate, and makes the rotating member rotate synchronously, forming a combined detection trajectory covering the liquid crystal display screen. Multiple groups of rotating members rotate synchronously through the linkage rod, and cooperate with the uniformly distributed insertion rods of the pressing member to perform automatic compressive detection at multiple points and multiple regions on the display screen, significantly improving the detection efficiency and coverage range, and ensuring the comprehensiveness of detection; 2. In the present invention, through the mechanical linkage mechanism of the pressing member and the reset member, the device realizes the precise control of the pressing and reset processes. When pressing, the arc surface of the pressing block presses the limiting plate, triggering the telescopic rod to extend. Combining with the air pressure thrust in the sealed cavity, the insertion rod rotates 90 degrees and then moves downward to press the display screen. When resetting, the J-shaped reset plate forces the insertion rod to move upward through the inclined surface thrust, and the spiral groove reversely guides to restore the posture of the rectangular plate, and cooperates with the spring force of the telescopic rod to lock again. This process does not require additional power and realizes the action switching through a pure mechanical structure, ensuring the uniformity of the detection force and the reset accuracy, and improving the reliability of the device; 3. In the present invention, through the intelligent limit design of the locking member, the device can stably lock a specific position of the rotating member. The V-shaped fixed rod and the return spring push the locking block to accurately insert into the locking groove, and form a mechanical engagement by the fitting of the clamping groove and the locking groove to limit the rotation of the limiting ring, ensuring the stability of the pressing position. The arc surfaces of the linkage rod and the locking block cooperate to realize the orderly switching of local unlocking and locking during the rotation process, avoiding detection errors caused by rotational deviation, and providing a reliable mechanical limit guarantee for the compressive detection of the display screen. Description of the Drawings

[0016] Figure 1 It is the overall structural schematic diagram of a compressive detection device for liquid crystal display screen production described in the present invention; Figure 2It is a schematic structural diagram of a rotating member in a compressive strength detection device for liquid crystal display production according to the present invention; Figure 3 It is a schematic structural diagram of an installation cylinder in a compressive strength detection device for liquid crystal display production according to the present invention; Figure 4 It is a schematic internal structural diagram of an installation cylinder in a compressive strength detection device for liquid crystal display production according to the present invention; Figure 5 It is a structural sectional view of an installation cylinder in a compressive strength detection device for liquid crystal display production according to the present invention; Figure 6 It is a schematic structural diagram of a rotating ring in a compressive strength detection device for liquid crystal display production according to the present invention; Figure 7 It is a schematic structural diagram of an adjustment groove in a compressive strength detection device for liquid crystal display production according to the present invention; Figure 8 It is a schematic structural diagram of a jack in a compressive strength detection device for liquid crystal display production according to the present invention; Figure 9 It is a schematic structural diagram of a pressure block in a compressive strength detection device for liquid crystal display production according to the present invention; Figure 10 It is a schematic structural diagram of a reset member in a compressive strength detection device for liquid crystal display production according to the present invention; Figure 11 It is a side view of a reset member in a compressive strength detection device for liquid crystal display production according to the present invention; Figure 12 It is a schematic structural diagram of a locking member in a compressive strength detection device for liquid crystal display production according to the present invention; Figure 13 It is a schematic structural diagram of a locking block in a compressive strength detection device for liquid crystal display production according to the present invention.

[0017] In the figure: 1. Base plate; 11. Restricting plate; 2. Driving member; 21. Linear driver; 22. Connecting block; 23. Connecting shaft; 24. Gear; 25. Rack; 3. Rotating member; 31. Installation cylinder; 32. Restricting ring; 33. Connecting cylinder; 34. Linking rod; 35. Avoidance groove; 4. Pressing member; 41. Insertion cylinder; 411. Jack; 412. Slide block; 42. Insertion rod; 43. Rotating ring; 44. Adjustment groove; 45. Connecting rod; 46. Telescopic rod; 47. Limiting plate; 48. Pressure block; 5. Reset member; 51. Installation rod; 52. Connecting plate; 53. Reset plate; 6. Locking member; 61. Fixed rod; 62. Push rod; 63. Locking block; 64. Reset spring; 65. Card slot; 66. Locking groove. Detailed implementation manners

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. Next, the embodiments of the present invention will be described according to its overall structure.

[0020] Referring to Figure 1 , in the embodiment of the present invention, a compressive strength detection device for liquid crystal display production includes: a bottom plate 1, a driving member 2 is arranged on the bottom plate 1, a rotating member 3 is arranged on the driving member 2 and moves horizontally and rotates along with the driving of the driving member 2, a pressing member 4 for pressing the display screen placed on the bottom plate 1 is arranged on the rotating member 3, a reset member 5 for resetting the display screen after pressing is arranged on the driving member 2, and a locking member 6 for restricting partial rotation of the rotating member 3 is arranged on the rotating member 3.

[0021] For this explanation, in this technical solution, pressing is used as the compressive strength detection in the existing method. In the existing compressive strength detection, precision pressure devices such as air cylinders and pressing heads are used to apply pressure to the surface of the panel. The inspectors will carefully observe whether the panel is cracked, whether there is liquid leakage in the liquid crystal layer, and whether there are abnormalities in the display screen, etc., so as to judge whether the product meets the standards. Through the compressive strength detection, not only can potential defects in the production process be detected in time, but also the actual use scenario of users can be highly restored.

[0022] Referring to Figure 2, the driving member 2 includes a linear actuator 21 fixedly connected to the bottom plate 1. The linear actuator 21 adopts the prior art and is a common mechanical device used to convert rotational motion into linear motion. Its key components include a motor, a lead screw, a nut, a guide rail, a slider, etc. Its core working principle is that the motor drives the lead screw to rotate, and the nut on the lead screw moves axially along the lead screw during rotation, thereby converting rotational motion into linear motion. The nut is connected to the slider, and the slider slides along the guide rail to push the load to achieve linear motion. The movable end of the linear actuator 21 is fixedly connected to a connecting block 22. A connecting shaft 23 is rotatably connected to the side end of the connecting block 22. One end of the connecting shaft 23 is fixedly connected to a gear 24. One end of the gear 24 is fixedly connected to the rotating member 3. The top end of the bottom plate 1 is fixedly connected to a toothed plate 25. The toothed plate 25 is fixedly connected to the gear 24. A limiting plate 11 is fixedly connected to the bottom plate 1. There are two sets of driving members 2, symmetrically distributed on both sides of the rotating member 3. There are two sets of limiting plates 11. The two sets of limiting plates 11 and the two sets of toothed plates 25 form a rectangular placement area for the liquid crystal display screen. When the motor of the linear actuator 21 is started, the motor drives the lead screw to rotate, causing the nut on the lead screw to move axially along the lead screw. Since the nut is connected to the slider, the slider will slide along the guide rail, and then push the connecting block 22 fixedly connected to the slider to move linearly. The linear movement of the connecting block 22 will drive the connecting shaft 23 rotatably connected thereto, the gear 24 fixed to one end of the connecting shaft 23, and the rotating member 3 fixedly connected to the gear 24 to move horizontally together. During the horizontal movement, since the gear 24 meshes with the toothed plate 25 fixed to the top end of the bottom plate 1, when the gear 24 moves horizontally with the connecting block 22, the toothed plate 25 will cause the gear 24 to rotate, and the rotation of the gear 24 will drive the rotating member 3 to rotate, thereby realizing the horizontal movement and rotation of the rotating member 3 driven by the driving member 2.

[0023] Adopting the above solution: Through the linkage design of the connecting block 22, the connecting shaft 23 and the gear 24, and cooperating with the toothed plate 25 fixed on the bottom plate 1 to form a transmission mechanism, the rotating member 3 can synchronously achieve precise rotation during horizontal movement, organically combine linear motion and rotational motion to form a composite motion trajectory, and meet the requirements of the pressing member 4 for multi-angle and multi-position compressive detection of the display screen.

[0024] Refer to Figures 2 to 3, the rotating member 3 includes a connecting cylinder 33 fixedly connected to the driving member 2. One end of the connecting cylinder 33 is rotatably connected to a limiting ring 32. The cross-section of the limiting ring 32 is convex-shaped. One end of the limiting ring 32 is rotatably connected to a mounting cylinder 31. Two sets of connecting cylinders 33 and limiting rings 32 are provided in each set of rotating members 3. The two sets of connecting cylinders 33 and limiting rings 32 are symmetrically distributed on both sides of the mounting cylinder 31. Multiple sets of rotating members 3 are provided. The multiple sets of rotating members 3 are connected through the connecting cylinders 33. Among them, one set of connecting cylinders 33 in each of the two sets of rotating members 3 located on both sides is fixedly connected to the side end of the gear 24. The connecting cylinder 33, the limiting ring 32, the mounting cylinder 31, and the gear 24 form a sealed cavity, and the cavity is filled with gas. A linkage rod 34 is fixedly connected to the outside of the connecting cylinder 33. The cross-section of the linkage rod 34 is triangular-like, and both sides of the linkage rod 34 are arc-shaped. One end of the linkage rod 34 is fixedly connected to the mounting cylinder 31. An avoidance groove 35 is formed on the linkage rod 34. The avoidance groove 35 is arranged above the limiting ring 32. Two sets of linkage rods 34 are provided, symmetrically distributed on the outside of the rotating member 3. The connecting cylinders 33 and the mounting cylinders 31 in the multiple sets of rotating members 3 are connected through the linkage rods 34 and rotate synchronously. When the connecting block 22 pushes the rotating member 3 to move horizontally, since the gear 24 meshes with the toothed plate 25 fixed on the bottom plate 1, the gear 24 rotates during the horizontal movement, and then drives the rotating member 3 fixedly connected thereto to rotate synchronously. At this time, the connecting cylinders 33 and the mounting cylinders 31 in the multiple sets of rotating members 3 are connected through the linkage rods 34 and rotate synchronously.

[0025] Adopting the above solution: Through the sealed cavity formed by the connecting cylinder 33, the limiting ring 32, the mounting cylinder 31, and the gear 24, when the pressing member 4 works, the air pressure thrust in the cavity can be used to assist the downward movement of the insertion rod 42 and form a linkage with the mechanical structure of the pressing block 48 squeezing the limiting plate 47, making the downward pressing action of the insertion rod 42 more stable and the power transmission efficient, and reducing the dependence on a single mechanical power.

[0026] Refer to Figures 3 to 9, the pressing member 4 includes a connecting rod 45 fixedly connected to the driving member 2. The connecting rod 45 passes through multiple sets of rotating members 3, and both ends of the connecting rod 45 are fixedly connected to a set of gears 24 respectively. An expansion rod 46 is fixedly connected to the outer cylindrical surface of the connecting rod 45. A spring is arranged inside the expansion rod 46. In the initial state, the expansion rod 46 is in a contracted state under the action of the spring. One end of the expansion rod 46 is fixedly connected to a limiting plate 47. A socket cylinder 41 is fixedly connected to the outside of the mounting cylinder 31. There are multiple sets of socket cylinders 41, which are evenly distributed on the outside of each mounting cylinder 31. A jack 411 is opened through the bottom end of each socket cylinder 41. A sliding block 412 is fixedly connected to the inner wall of the jack 411. There are four sets of sliding blocks 412, which are symmetrically distributed on the inner wall of the jack 411. A plug rod 42 is slidably inserted into each socket cylinder 41. The plug rod 42 is composed of a straight rod and a rectangular plate. One set of expansion rod 46 and one set of limiting plate 47 are arranged on each side of each plug rod 42. The distance between the two limiting plates 47 on both sides of each plug rod 42 is smaller than the long side of the rectangular plate in the plug rod 42 and larger than the short side of the rectangular plate in the plug rod 42. An adjustment groove 44 is opened on the outer side of the straight rod in each plug rod 42. The adjustment groove 44 is composed of a straight groove and a spiral groove. The straight groove is communicated with the spiral groove. There are four sets of adjustment grooves 44, which are symmetrically distributed on the outer side of the straight rod. Each sliding block 412 is slidably connected to one set of adjustment grooves 44. The plug rod 42 can be rotated by 90 degrees through the spiral groove, driving the limiting plate 47 to rotate. A rotating ring 43 is arranged through the mounting cylinder 31, and the rotating ring 43 is rotatably connected to the mounting cylinder 31. The cross section of the rotating ring 43 is I-shaped, and a sliding block is fixedly connected to the inner wall of the rotating ring 43. The sliding block is slidably connected to the straight groove in the adjustment groove 44. One end of the plug rod 42 sequentially passes through the rotating ring 43 and the jack 411. A pressing block 48 is fixedly connected to the inner wall of the limiting ring 32. The cross section of the pressing block 48 is triangular-like. The two sides and the ground of the pressing block 48 are arc-shaped. A C-shaped groove is opened at the top end of the pressing block 48. The inner diameter of the C-shaped groove abuts against the connecting rod 45. When the driving member 2 drives the rotating member 3 to rotate, the mounting cylinder 31 rotates synchronously with the rotating member 3, driving the socket cylinders 41 and the plug rods 42 evenly distributed on its outside to move synchronously. At this time, one set of expansion rods 46 arranged on each side of the plug rod 42 is initially in a contracted state, and the distance between the limiting plates 47 at its end is smaller than the long side of the rectangular plate of the plug rod 42. Therefore, the plug rod 42 is stuck by the limiting plates 47 and cannot move downward. When one set of plug rods 42 moves to the bottom of the mounting cylinder 31, the limiting plate 47 abuts against the arc surface of the pressing block 48. Due to the rotation tendency of the rotating member 3 and the guiding action of the arc surface of the pressing block 48, the pressing block 48 gradually presses the limiting plate 47 downward, forcing the limiting plate 47 to move downward against the contraction force of the spring inside the expansion rod 46, and the expansion rod 46 extends accordingly. During this process, the plug rod 42 loses the restriction of the limiting plate 47, and under the air pressure thrust generated by the gas in the closed cavity formed by the connecting cylinder 33, the limiting ring 32, the mounting cylinder 31 and the gear 24, the plug rod 42 slides downward along the jack 411 of the socket cylinder 41. During the downward movement of the plug rod 42,Four groups of sliders 412 on the inner walls of the four groups of jacks 411 of the adjustment slots 44 on the outer side of the straight rod are in sliding fit. In the initial stage, the sliders 412 slide along the spiral grooves of the adjustment slots 44. The inclined guiding effect of the spiral grooves forces the insertion rod 42 to rotate 90 degrees around its own axis, so that the long side direction of its rectangular plate becomes the short side direction. Until the slider 412 enters the straight groove of the adjustment slot 44, the insertion rod 42 stops rotating and continues to move vertically downward. At this time, the short side of the rectangular plate of the insertion rod 42 smoothly passes through the gap between the two limit plates 47, and the insertion rod 42 continues to move downward until its end contacts the liquid crystal display screen on the bottom plate 1, completing the pressing operation on the display screen.

[0027] Adopting the above solution: Through the cooperation of the telescopic rod 46 and the limit plate 47, the insertion rod 42 is locked by the spring contraction force in the initial state, ensuring that the insertion rod 42 in the non-pressing area will not accidentally touch the display screen and avoiding interference during the detection process. When the insertion rod 42 rotates to the lowest position with the installation cylinder 31, the pressing block 48 on the inner wall of the limiting ring 32 precisely squeezes the limit plate 47 through the arc surface guidance, forcing the telescopic rod 46 to extend and the limit plate 47 to move downward, realizing the automatic unlocking of the insertion rod 42. This mechanical triggering mechanism highly matches the movement track of the rotating part 3, ensuring that the pressing action is only started at the preset detection position, improving the accuracy and controllability of the detection.

[0028] Refer to Figures 10 to 11, the reset member 5 includes a mounting rod 51 fixedly connected to one end of the connecting block 22. Both ends of the mounting rod 51 are fixedly connected to a group of connecting blocks 22 respectively. One end of the mounting rod 51 is fixedly connected with a connecting plate 52. The cross-section of the connecting plate 52 is L-shaped. One end of the connecting plate 52 is fixedly connected with a reset plate 53. The cross-section of the reset plate 53 is J-shaped. The reset plate 53 is arranged obliquely below the rotating member 3. When the insertion rod 42 finishes pressing the liquid crystal display screen, the mounting cylinder 31 continues to rotate, driving the insertion rod 42 that has completed the pressing to rotate with the mounting cylinder 31 to the action area of the reset plate 53. The inclined section of the reset plate 53 first contacts the bottom end of the insertion rod 42. As the rotating member 3 continues to rotate, the inclined plane of the reset plate 53 gradually exerts a thrust force to promote the retraction of the insertion rod 42, forcing the insertion rod 42 to overcome the air pressure thrust of the sealed cavity and the initial resistance of the telescopic rod 46, and slide upward along the insertion hole 411 of the insertion cylinder 41. During the upward movement of the insertion rod 42, the adjustment groove 44 on the outer side of its straight rod cooperates with the slider 412 on the inner wall of the insertion hole 411 again. The insertion rod 42 first moves upward along the straight groove of the adjustment groove 44 until the rectangular plate of the insertion rod 42 passes through between two adjacent rectangular plates, until the slider 412 enters the spiral groove from the straight groove of the adjustment groove 44. The reverse guiding effect of the spiral groove causes the insertion rod 42 to rotate counterclockwise by ninety degrees, and the long side of the rectangular plate rotates back to the direction perpendicular to the distance between the limiting plates 47, that is, the long side direction is consistent with the distance direction between the limiting plates 47. When the insertion rod 42 moves upward to the initial position, the horizontal section of the reset plate 53 continues to abut against the insertion rod 42 to prevent it from moving outward under the action of the telescopic rod 46. Then, as the rotating member 3 continues to rotate, the limiting plates 47 on both sides of this group of insertion rods 42 move out of the range of the pressing block 48. At this time, the limiting plates 47 are reset to the initial height under the spring force of the telescopic rod 46, and the distance between the two limiting plates 47 is less than the long side of the rectangular plate of the insertion rod 42 again, forming a limiting constraint to prevent the insertion rod 42 from moving downward.

[0029] Adopting the above solution: Through the J-shaped reset plate 53 linked with the driving member 2, the automatic reset of the insertion rod 42 is realized by using the guiding thrust of the mechanical structure, without an additional power source, with a simple structure and strong reliability. When the insertion rod 42 finishes pressing and rotates with the mounting cylinder 31 to the action area of the reset plate 53, the inclined section of the reset plate 53 contacts the bottom end of the insertion rod 42. As the rotating member 3 rotates, the inclined plane gradually exerts an upward thrust force, precisely forcing the insertion rod 42 to overcome the air pressure in the sealed cavity and the resistance of the telescopic rod 46 and move upward along the insertion hole 411. This process is strictly matched with the movement track of the rotating member 3 to ensure the accurate triggering timing and force control of the reset action, avoiding incomplete reset or over-reset.

[0030] Refer to Figures 12 to 13The locking member 6 is provided with multiple groups, which are evenly distributed on each group of limiting rings 32. The locking member 6 includes a fixing rod 61 fixedly connected to the connecting plate 52. The fixing rod 61 is provided with two groups, which are symmetrically distributed above the limiting ring 32. The two groups of fixing rods 61 are distributed in a V shape. One end of each group of fixing rods 61 is slidably inserted with two groups of push rods 62. The cross section of the push rods 62 is T-shaped. One end of the two groups of push rods 62 passes through the fixing rod 61 and is fixedly connected with a group of locking blocks 63. The cross section of the locking block 63 is triangular, and the two sides of the locking block 63 are arc surfaces. A group of return springs 64 are sleeved on the outside of each group of push rods 62. The two ends of the return spring 64 are respectively abutted against the fixing rod 61 and the locking block 63. A locking groove is provided on the outside of each group of limiting rings 32. 66, there are two groups of locking grooves 66, which are symmetrically distributed on the outside of the limiting ring 32. The cross-section of the locking grooves 66 is rectangular. The locking block 63 is slidably plugged with the locking grooves 66. Two groups of card grooves 65 are opened on the side ends of each group of locking blocks 63. The two groups of card grooves 65 are symmetrically distributed on the arc surfaces on both sides of the locking block 63. The cross-section of the card grooves 65 is a right-angled triangle, so that the straight sides of the card grooves 65 are in contact with the straight sides of the rectangular locking grooves 66. In the initial state, the return spring 64 sleeved on the outside of the push rod 62 is in a naturally stretched state, and its elastic force pushes the T-shaped push rod 62 to drive the triangular locking block 63 to slide in the direction of the limiting ring 32. When the rectangular locking groove 66 on the outside of the limiting ring 32 rotates to align with the locking block 63, the locking block 63 is locked in the spring. The locking groove 66 is precisely inserted under the thrust, and the arc surface design on both sides cooperates with the straight side of the right-angled triangle groove 65 at the side end to fit closely with the rectangular straight side of the locking groove 66 to form a stable locking structure, which firmly fixes the locking block 63 in the groove, thereby limiting the rotation of the limiting ring 32. Since the pressure block 48 is fixed to the inner wall of the limiting ring 32, it is locked synchronously with the limiting ring 32 and cannot continue to rotate with the rotating member 3, thereby achieving stable restriction of the current state. When the driving member 2 drives the rotating member 3 to rotate, the two groups of triangular linkage rods 34 symmetrically distributed on the outside rotate synchronously with the rotating member 3. Because the two groups of fixed rods 61 are distributed in a V shape, and the linkage rods 34 are arranged in a straight line, only one group of linkage rods 34 and one group of lock rods will appear during the rotation process. When the stop block 63 abuts, the other group of locking blocks 63 always remain in a locked state. When the curved side of the linkage rod 34 contacts the curved surface of the locking block 63, the locking block 63 is pushed to overcome the elastic force of the return spring 64 and slide toward the inside of the fixed rod 61 under the guidance of the curved surface. The return spring 64 is compressed to store energy, and the locking block 63 withdraws from the locking groove 66, releasing the current locked state and allowing the rotating linkage rod 34 to pass smoothly. When the linkage rod 34 passes, the return spring 64 that loses the abutment force stretches to release energy, pushing the locking block 63 to return along the fixed rod 61 and reinsert it into the corresponding locking groove 66, thereby restoring the locking state of the limiting ring 32 and ensuring stable restriction and orderly rotation switching of the rotating member 3 at a specific position.

[0031] Adopting the above solution: Through the collaborative design of the fixed rod 61 distributed in a V shape, the T-shaped push rod 62, the triangular locking block 63, and the return spring 64, an accurate mechanical locking and unlocking mechanism is formed, which can realize the automatic control of the rotation of the limiting ring 32 without electrical control. The natural stretching force of the return spring 64 pushes the locking block 63 to accurately insert into the rectangular locking groove 66 on the outside of the limiting ring 32. Cooperating with the close fit between the right-angled triangular groove 65 on the side end of the locking block 63 and the straight edge of the locking groove 66, a stable mechanical clamping structure is formed, effectively restricting the rotation of the limiting ring 32 and the pressing block 48, ensuring that the pressing member 4 maintains a fixed pressing position during the detection process, and avoiding detection errors caused by rotational deviation.

[0032] The working principle of the present invention is as follows: when in use, the linear driver 21 of the driving member 2 drives the lead screw to rotate through the motor, the nut on the lead screw moves axially and drives the sliding block to slide along the guide rail, pushing the connecting block 22 to make a linear motion, and the connecting block 22 drives the gear 24 to move horizontally synchronously through the connecting shaft 23. Since the gear 24 is meshed with the toothed plate 25 fixed on the base plate 1, the horizontally moving gear 24 rotates under the action of the toothed plate 25, and then drives the rotating member 3 fixedly connected thereto to realize a compound motion of horizontal movement and rotation. When a group of plug rods 42 rotates to the bottom of the mounting tube 31, the triangular-shaped pressing block 48 fixed to the inner wall of the limiting ring 32 squeezes the limiting plate 47 through the arc surface guide, forcing the telescopic rod 46 to extend, The limit plate 47 moves downward, at which time the insertion rod 42 loses its limit constraint and slides downward along the insertion hole 411 of the insertion tube 41 under the air pressure thrust of the closed cavity formed by the connecting tube 33, the limiting ring 32, the installation tube 31 and the gear 24. During the sliding process, the adjustment groove 44 on the outer side of the straight rod of the insertion rod 42 cooperates with the slider 412 on the inner wall of the insertion hole 411, and the insertion rod 42 is rotated ninety degrees through the inclined guidance of the spiral groove, and the long side of the rectangular plate is turned into the short side, which passes through the gap of the limit plate 47 smoothly, and finally the end contacts and presses the LCD screen on the bottom plate 1 to complete the compression test. After the pressing is completed, the installation tube 31 continues to rotate, driving the inserted rod 42 that has completed the pressing to move to the action area of the reset plate 53, and the inclined section of the reset plate 53 is aligned with the insertion rod 42. When the bottom end contacts, the rotating member 3 continues to rotate, and the inclined surface applies an upward thrust, forcing the insertion rod 42 to overcome the air pressure thrust and the resistance of the telescopic rod 46 and move up along the insertion hole 411. During the upward movement, the adjusting groove 44 and the slider 412 cooperate again, so that the insertion rod 42 first moves up along the straight groove until the rectangular plate on the insertion rod 42 passes through the gap of the limiting plate 47. At this time, the slider 412 enters the spiral groove of the adjusting groove 44, and the reverse guidance of the spiral groove causes the insertion rod 42 to rotate ninety degrees counterclockwise, and the long side of the rectangular plate is reset to a direction perpendicular to the spacing of the limiting plate 47. When the insertion rod 42 returns to the initial position, the horizontal section of the reset plate 53 limits its outward movement until the limiting plate 47 pressed down by the pressing block 48 moves out of the working area of the pressing block 48, so that the limiting plate 47 is on the telescopic rod 46. The locking member 6 then moves back up under the action of the spring force, re-locks the insertion rod 42, and completes the reset. During the whole process, the locking member 6 pushes the triangular locking block 63 to insert into the rectangular locking groove 66 outside the limiting ring 32 through the V-shaped fixed rod 61, the push rod 62 and the reset spring 64, restricting the rotation of the limiting ring 32 and the pressing block 48 to ensure the stability of the pressing position. When the linkage rod 34 of the rotating member 3 rotates to contact the locking block 63, the arc guide pushes the locking block 63 to compress the reset spring 64 and exit the locking groove 66, releasing the locking state and allowing the linkage rod 34 to pass. After the linkage rod 34 passes, the reset spring 64 stretches and pushes the locking block 63 to reinsert into the locking groove 66 to restore the lock, ensuring that the rotating member 3 switches between the pressing and reset states in an orderly manner.Through the composite motion design of the driving member 2 and the rotating member 3, the device can achieve the coordinated actions of horizontal movement and rotation. The linear driver 21 of the driving member 2 pushes the connecting block 22 to move linearly through the screw-nut mechanism, drives the gear 24 to mesh with the toothed plate 25, and makes the rotating member 3 rotate synchronously, forming a composite detection trajectory covering the liquid crystal display screen. Multiple groups of rotating members 3 rotate synchronously through the linkage rod 34. Cooperating with the uniformly distributed insertion rods 42 of the pressing member 4, the device can perform automatic compressive tests at multiple points and multiple regions on the display screen, significantly improving the detection efficiency and coverage range, ensuring the comprehensiveness of detection. Through the mechanical linkage mechanism of the pressing member 4 and the reset member 5, the device realizes the precise control of the pressing and reset processes. When pressing, the arc surface of the pressing block 48 squeezes the limiting plate 47, triggering the telescopic rod 46 to extend. Combining with the air pressure thrust in the sealed cavity, the insertion rod 42 rotates 90 degrees and then moves downward to press the display screen. When resetting, the J-shaped reset plate 53 forces the insertion rod 42 to move upward through the inclined plane thrust, and the spiral groove reversely guides to restore the posture of the rectangular plate, and cooperates with the spring force of the telescopic rod 46 to lock again. This process does not require additional power and realizes the action switching through a pure mechanical structure, ensuring the uniformity of the detection force and the reset accuracy, and improving the reliability of the device. Through the intelligent limit design of the locking member 6, the device can stably lock a specific position of the rotating member 3. The V-shaped fixing rod 61 and the reset spring 64 push the locking block 63 to accurately insert into the locking groove 66, and form a mechanical engagement by the fitting of the clamping groove 65 and the locking groove 66, restricting the rotation of the limiting ring 32 to ensure the stability of the pressing position. The arc surfaces of the linkage rod 34 and the locking block 63 cooperate to realize the orderly switching of local unlocking and locking during the rotation process, avoiding detection errors caused by rotational deviation, and providing a reliable mechanical limit guarantee for the compressive test of the display screen.;

[0033] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An anti-pressure detection device for liquid crystal display production, comprising: Bottom plate (1), characterized in that a driving member (2) is provided on the bottom plate (1), a rotating member (3) that moves horizontally and rotates along with the driving of the driving member (2) is provided on the driving member (2), and a pressing member (4) for pressing the display screen placed on the bottom plate (1) is provided on the rotating member (3); The rotating member (3) includes a connecting cylinder (33) fixedly connected to the driving member (2). One end of the connecting cylinder (33) is rotatably connected to a limiting ring (32), and one end of the limiting ring (32) is rotatably connected to an installation cylinder (31). The cavity formed by the connecting cylinder (33), the limiting ring (32) and the installation cylinder (31) is filled with gas. A linkage rod (34) is fixedly connected to the outer side of the connecting cylinder (33), and one end of the linkage rod (34) is fixedly connected to the installation cylinder (31); The pressing member (4) includes a connecting rod (45) fixedly connected to the driving member (2). An expansion rod (46) is fixedly connected to the outer circumferential surface of the connecting rod (45). One end of the expansion rod (46) is fixedly connected to a limiting plate (47). An insertion rod (42) is arranged in the insertion cylinder (41). An adjustment groove (44) is formed on the outer side of the insertion rod (42). A pressing block (48) is fixedly connected to the inner wall of the limiting ring (32); Among them, when the driving member (2) drives the rotating member (3) to move horizontally and rotate, the limiting plate (47) at one end of the contracted expansion rod (46) abuts against the outer contour of the pressing block (48), and the expansion rod (46) is extended. Losing the restriction of the limiting plate (47), and under the action of the air pressure in the rotating member (3), the insertion rod (42) is pushed to move outward. At the same time, under the guidance of the adjustment groove (44), the insertion rod (42) rotates and passes through from the limiting plate (47) until the bottom end of the insertion rod (42) presses the display screen.

2. The compressive strength detection device for liquid crystal display production according to claim 1, wherein, An insertion cylinder (41) is fixedly connected to the outer side of the installation cylinder (31). A jack (411) is formed through the bottom end of the insertion cylinder (41). A slider (412) is fixedly connected to the inner wall of the jack (411). One end of the insertion rod (42) penetrates through the jack (411), and the slider (412) is slidably connected to the adjustment groove (44).

3. The compressive strength detection device for liquid crystal display production according to claim 2, characterized in that, A rotating ring (43) is arranged through the installation cylinder (31), and the rotating ring (43) is rotatably connected to the installation cylinder (31). One end of the insertion rod (42) sequentially penetrates through the rotating ring (43) and the jack (411).

4. The compressive testing device for liquid crystal display production according to claim 3, wherein, An avoidance groove (35) is formed on the linkage rod (34). The avoidance groove (35) is arranged above the limiting ring (32). Multiple groups of the connecting cylinder (33), the limiting ring (32) and the installation cylinder (31) are provided. Multiple groups of connecting cylinders (33) and installation cylinders (31) are connected by the linkage rod (34) and rotate synchronously.

5. The compressive strength detection device for liquid crystal display production according to claim 4, characterized in that, A reset member (5) for resetting the display screen after pressing is provided on the driving member (2), and a locking member (6) for restricting part of the rotation of the rotating member (3) is provided on the rotating member (3).

6. The compressive strength detection device for liquid crystal display production according to claim 5, characterized in that, The driving member (2) includes a linear driver (21) fixedly connected to the bottom plate (1). A connecting block (22) is fixedly connected to the movable end of the linear driver (21). A connecting shaft (23) is rotatably connected to the side end of the connecting block (22). One end of the connecting shaft (23) is fixedly connected to a gear (24). One end of the gear (24) is fixedly connected to the end face of a group of connecting cylinders (33).

7. An anti-pressure detection device for liquid crystal display production according to claim 6, characterized in that, A toothed plate (25) is fixedly connected to the top end of the bottom plate (1). The toothed plate (25) is meshed with the gear (24). A limiting plate (11) is fixedly connected to the bottom plate (1).

8. An anti-pressure detection device for liquid crystal display production according to claim 7, characterized in that, The reset member (5) includes a mounting rod (51) fixedly connected to one end of the connecting block (22). One end of the mounting rod (51) is fixedly connected to a connecting plate (52). One end of the connecting plate (52) is fixedly connected to a reset plate (53).

9. The compressive strength detection device for liquid crystal display production according to claim 8, characterized in that The locking member (6) includes a fixing rod (61) fixedly connected to the connecting plate (52). A push rod (62) is slidably inserted into one end of the fixing rod (61). One end of the push rod (62) is fixedly connected to a locking block (63). A return spring (64) is sleeved on the outer side of the push rod (62).

10. A compressive testing device for liquid crystal display production according to claim 9, characterized in that, A locking groove (66) is formed on the outer side of the limiting ring (32). The locking block (63) is slidably inserted into the locking groove (66). A clamping groove (65) is formed on the side end of the locking block (63). The clamping groove (65) is adapted to the locking groove (66).

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