Device and method for adjusting gap between liquid crystal screen and top plate in touch control box

Abstract

The invention discloses a device and method for adjusting a gap between a liquid crystal screen and a top plate in a touch control box, and belongs to the field of rail transit subway systems. The device is fixed in a touch control box, a liquid crystal screen is arranged below the device, four hand lock floating screws are rotated clockwise, the threaded ends of the hand lock floating screws push four floating supports to move downwards till small foam on the bottom faces of four convex hulls tightly abuts against the liquid crystal screen, at the moment, four reset springs are in a compressed state, and fixing of the liquid crystal screen is completed; and the four hand lock floating screws are rotated anticlockwise, the four floating supports move upwards under the action of the elastic force of the reset springs till the small foam on the bottom faces of the four convex hulls is separated from the liquid crystal screen, at the moment, the reset springs return to the original state, and the device is taken down to complete disassembly of the liquid crystal screen. And the gaps between the liquid crystal screen and the top plate are equal through uniform compression force of the four small foams, so that each corner can be fastened.

Description

Technical Field

[0001] The present invention relates to a device and method for adjusting the gap between an LCD screen and a top plate in a touch control box, and belongs to the field of rail transit subway systems. Background Art

[0002] In the field of touch control units of rail transit subway systems, it is necessary to place the LCD screen of the touch control unit inside the touch control box and firmly fix it. Usually, the top plate is directly pressed against the back of the LCD screen. After the top plate is fixed, due to manufacturing tolerances, the plane of the top plate cannot be completely flat. Therefore, it is impossible to make the four corners fit perfectly by relying solely on the plane of the top plate to press the back of the LCD screen. This results in a relatively large gap at one of the four corners of the LCD screen, causing the LCD screen to be loosely fastened, which not only affects work efficiency but also makes it impossible to control the assembly quality. Summary of the Invention

[0003] In view of the problem that it is not easy to control the pressing of the LCD screen in the prior art, the present invention provides a device and method for adjusting the gap between the LCD screen and the top plate in the touch control box. By the uniform compression force of four small foam pads, the gaps between the LCD screen and the top plate are made equal, so that each corner can be fastened, and finally the LCD screen is stabilized. The structure is simple and fast, and the cost of repeated trial and error is avoided.

[0004] The technical solution of the present invention is: A device for adjusting the gap between an LCD screen and a top plate in a touch control box includes an LCD screen, a touch control box, a top plate, a floating bracket, a return spring, a stop post, a hand-locking floating screw, a small foam pad, a cross beam, and a positioning screw. On both sides of each of the four adjustment holes of the top plate, a stop post is provided. On each pair of stop posts, a floating bracket is provided. On the stop posts between the two wings of each of the four floating brackets and the top plate surface, a return spring is provided respectively. A small foam pad is fixed on the convex part of each floating bracket, and the four small foam pads respectively extend out of the adjustment holes. The two cross beams are respectively fixed on two positioning screws at both ends of the top plate. The threaded tops of the two hand-locking floating screws screwed on each cross beam respectively correspond to the convex parts of the four floating brackets. The LCD screen is arranged inside the touch control box, the top plate is arranged on the LCD screen, and the top plate is fixed to the touch control box. By clockwise or counterclockwise adjusting the hand-locking floating screw, the floating bracket can move up and down on the two stop posts through the return spring.

[0005] A method for adjusting the gap between an LCD screen and a top plate in a touch control box is operated as follows: Rotate the four hand-locking floating screws clockwise. The threaded ends of the hand-locking floating screws push the four floating brackets to move downward until the small foam pads at the bottoms of the four convex parts press tightly against the LCD screen, and the gaps between the LCD screen and the top plate are equal. At this time, the four return springs are in a compressed state, and the locking and fixing of the LCD screen are completed. Rotate the four hand-lock floating screws counterclockwise. Under the elastic force of the return spring, the four floating brackets move upward until the small foam pads on the bottom surfaces of the four convex bumps are separated from the liquid crystal screen. At this time, the return spring returns to its original state, and the device is removed to complete the disassembly of the liquid crystal screen.

[0006] The beneficial effects of the present invention are as follows: Through the stretching and restoration of a simple return spring, the entire device adjusts the gaps at the four corners of the back of the liquid crystal screen by using the feeding distance of the hand-lock floating screws. By the uniform compression force of the four small foam pads, the gaps between the liquid crystal screen and the top plate are made equal, so that each corner can be fastened, ultimately stabilizing the liquid crystal screen and quickly solving the problem that the four corners of the liquid crystal screen cannot be fully attached; the compression and separation of the small foam pads on the bottom surface of the floating bracket and the liquid crystal screen further realize the fixation and disassembly of the liquid crystal screen; this device is simple, fast, and avoids the cost of repeated trial and error; the overall structure is simple, easy to operate, has strong versatility, and controllable costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 is a schematic structural diagram for implementing the present invention; Figure 2 is Figure 1 a schematic exploded view of the structure; Figure 3 is Figure 1 a sectional view taken along line A-A of the structure in the state of locking the liquid crystal screen; Figure 4 is Figure 3 an enlarged view of part B of the structure; Figure 5 is Figure 1 a sectional view taken along line A-A of the structure in the state of loosening the liquid crystal screen; Figure 6 is Figure 5 an enlarged view of part C of the structure; Figure 7 is a schematic structural diagram of the top plate of the present invention; Figure 8 is a schematic structural diagram of the floating bracket of the present invention.

[0008] Wherein: 1. Top plate; 1-1. Adjusting hole; 1-2. Positioning screw hole; 1-3. Stop post hole I; 2. Floating bracket; 2-1. Convex bump; 2-2. Flank; 2-2-1. Stop post hole II; 3. Return spring; 4. Stop post; 5. Hand-lock floating screw; 6. Small foam pad; 7. Liquid crystal screen; 8. Cross beam; 8-1. Screw hole; 8-2. Threaded hole; 9. Positioning screw; 10. Fixed nut; 11. Touch control box; 11-1. Side wall of the touch control box. DETAILED DESCRIPTION OF THE INVENTION

[0009] As Figure 1 , Figure 2As shown in the figure, a device for adjusting the gap between the liquid crystal screen and the top plate in a touch control box includes a top plate 1, a floating bracket 2, a return spring 3, a stop post 4, a hand-locking floating screw 5, a small foam 6, a cross beam 8, a positioning screw 9, and a fixing nut 10, as well as a liquid crystal screen 7 and a touch control box 11.

[0010] As Figure 7 shown, the top plate 1 is a rectangular plate. At each of the four corners of the top plate 1, there is respectively a positioning screw hole 1-2, an adjustment hole 1-1, and two stop post holes Ⅰ 1-3. Each adjustment hole 1-1 is located between the two stop post holes Ⅰ 1-3, and each positioning screw hole 1-2 is located between the side wall of the top plate 1 and the adjustment hole 1-1.

[0011] As Figure 8 shown, the overall cross-section of the floating bracket 2 is U-shaped. The two sides of the floating bracket 2 are wing flanks 2-2. On each of the two wing flanks 2-2, there is respectively a stop post hole Ⅱ 2-2-1. On the U-shaped surface between the two wing flanks 2-2, there is a downward convex bump 2-1.

[0012] Select a small foam 6 made of black polyurethane foam with a hardness of 30 degrees. The liquid crystal screen 7 is an LCD screen, and the stop post 4 is selected as a mushroom head nylon nail.

[0013] As Figures 1 to 8 shown, respectively screw a positioning screw 9 into each of the four positioning screw holes 1-2 of the top plate 1. Insert a stop post 4 into each of the stop post holes Ⅰ 1-3 on the bottom surface of the top plate 1. Sleeve a return spring 3 on each of the four stop posts 4. The lower end of each return spring 3 is in contact and cooperation with the surface of the top plate 1. Sleeve the four floating brackets 2 respectively through the stop post holes Ⅱ 2-2-1 on the two wing flanks 2-2 onto the two stop posts 4 on both sides of each adjustment hole 1-1. The lower surfaces of the two wing flanks 2-2 of the four floating brackets 2 are respectively in contact and cooperation with the upper ends of each return spring 3. The upper surfaces of the two wing flanks 2-2 of the four floating brackets 2 are respectively in contact and cooperation with the lower end surfaces of the mushroom heads of each stop post 4. Bond and fix a small foam 6 on each convex bump 2-1 of the four floating brackets 2. The convex bumps 2-1 of the four floating brackets 2 and the small foams 6 are respectively arranged in each adjustment hole 1-1. Sleeve the two cross beams 8 respectively through the screw holes 8-1 on both sides onto the two corresponding positioning screws 9 at both ends of the top plate 1. Cooperate with the positioning screw 9 through the fixing nut 10 to fix the two cross beams 8 respectively on the surface of the top plate 1. Screw a hand-locking floating screw 5 into each of the two threaded holes 8-2 on the two cross beams 8. The threaded top ends of each hand-locking floating screw 5 respectively correspond to the concave surfaces of the convex bumps 2-1 of the four floating brackets 2. Set the liquid crystal screen 7 in the touch control box 11. Set the top plate 1 on the back plate of the liquid crystal screen 7. Then fix the two side walls of the top plate 1 to the corresponding side walls 11-1 of the touch control box through screws.

[0014] Adjust the hand-lock floating screw 5 clockwise or counterclockwise. Under the action of the return spring 3, the floating bracket 2 can move up and down on the two stop posts 4, driving the small foam 6 to move up and down in the adjustment hole 1-1.

[0015] Embodiment 1, a method for adjusting the gap between the liquid crystal screen and the top plate in a touch control box, is operated as follows: Rotate the four hand-lock floating screws 5 clockwise in sequence. The threaded top of the hand-lock floating screw 5 boosts the four floating brackets 2 to move downward until the small foam 6 at the bottom of the four bumps 2-1 presses tightly against the backplane of the liquid crystal screen 7, making the gap between the entire backplane of the liquid crystal screen 7 and the top plate 1 uniform. The adjustment of the hand-lock floating screw 5 is completed. At this time, the four return springs 3 are in a compressed state, and the fixation of the liquid crystal screen 7 is completed; Rotate the four hand-lock floating screws 5 counterclockwise. Since the feeding pressure at the threaded top of the hand-lock floating screw 5 becomes smaller, the four floating brackets 2 move upward under the elastic force of the return spring 3, causing the small foam 6 at the bottom of the four bumps 2-1 to slowly separate from the liquid crystal screen 7 until the four hand-lock floating screws 5 completely disengage from the threaded holes 8-2. At this time, the return spring 3 returns to its original state. Loosen the screws fixed to the side walls of the top plate 1 and the side walls 11-1 of the touch control box, and remove the device to complete the disassembly of the liquid crystal screen 7.

Claims

1. A device for adjusting the gap between the liquid crystal screen and the top plate in a touch control box, comprising a liquid crystal screen (7) and a touch control box (11), characterized in that: The device includes a top plate (1), a floating bracket (2), a return spring (3), a stop post (4), a hand-locking floating screw (5), a small foam (6), a cross beam (8) and a positioning screw (9); on both sides of each of the four adjustment holes (1-1) of the top plate (1), a stop post (4) is provided respectively. On each pair of stop posts (4), a floating bracket (2) is provided respectively. On the stop posts (4) between the two side wings (2-2) of the four floating brackets (2) and the top plate (1) surface, a return spring (3) is provided respectively. On the convex hull (2-1) of each floating bracket (2), a small foam (6) is fixed. The four small foams (6) respectively extend out of the adjustment holes (1-1); the two cross beams (8) are respectively fixed on the two positioning screws (9) at both ends of the top plate (1). The threaded tops of the two hand-locking floating screws (5) screwed on each cross beam (8) respectively correspond to the convex hulls (2-1) of the four floating brackets (2); the liquid crystal display screen (7) is arranged in the touch control box (11). The top plate (1) is arranged on the liquid crystal display screen (7). The top plate (1) is fixed to the touch control box (11); by adjusting the hand-locking floating screw (5) clockwise or counterclockwise, the floating bracket (2) can move up and down on the two stop posts (4) through the return spring (3).

2. The device for adjusting the gap between the liquid crystal screen and the top plate in the touch control box according to claim 1, characterized in that: The top plate (1) is a rectangular plate. At each of the four corners of the top plate (1), a positioning screw hole (1-2), an adjustment hole (1-1) and two stop post holes Ⅰ (1-3) are provided respectively. Each adjustment hole (1-1) is located between the two stop post holes Ⅰ (1-3). Each positioning screw hole (1-2) is located between the side wall of the top plate (1) and the adjustment hole (1-1).

3. The device for adjusting the gap between the liquid crystal screen and the top plate in the touch control box according to claim 1, wherein: The cross section of the floating bracket (2) is U-shaped. The two sides of the floating bracket (2) are side wings (2-2). On the two side wings (2-2), stop post holes Ⅱ (2-2-1) are provided respectively. On the U-shaped surface between the two side wings (2-2), a convex hull (2-1) is provided.

4. The device for adjusting the gap between the liquid crystal screen and the top plate in the touch control box according to claim 1, wherein: The stop post (4) is selected as a mushroom head nylon nail.

5. The device for adjusting the gap between the liquid crystal screen and the top plate in the touch control box according to claim 1, wherein: The small foam (6) is selected as polyurethane foam with a hardness of 30 degrees.

6. A method for adjusting the gap between the liquid crystal display screen and the top plate in a touch control box, which is implemented based on the device for adjusting the gap between the liquid crystal display screen and the top plate described in claim 1, characterized in that, Operate as follows: Rotate the four hand-locking floating screws (5) clockwise. The threaded ends of the hand-locking floating screws (5) push the four floating brackets (2) to move downward until the small foams (6) at the bottom surfaces of the four convex hulls (2-1) tightly press against the liquid crystal display screen (7), and the gaps between the liquid crystal display screen (7) and the top plate (1) are equal. At this time, the four return springs (3) are in a compressed state, and the locking and fixing of the liquid crystal display screen (7) are completed; rotate the four hand-locking floating screws (5) counterclockwise. The four floating brackets (2) move upward under the elastic force of the return springs (3) until the small foams (6) at the bottom surfaces of the four convex hulls (2-1) are separated from the liquid crystal display screen (7). At this time, the return springs (3) return to the original state, and the device is removed to complete the disassembly of the liquid crystal display screen.

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