Backlight module and liquid crystal display device

Abstract

The utility model discloses a backlight module and a liquid crystal display device, and belongs to the technical field of liquid crystal display, the backlight module comprises a backlight module body, the left side of the backlight module body is bolted with a fixed box, and the center of the left side of an inner cavity of the fixed box is bolted with a motor; through the structural design of the motor, the driving gear, the driven gear, the connecting shaft and the fan blades, air cooling is conducted on the backlight module body through the fan blades, the situation that the temperature of the backlight module body is too high after long-time use is avoided, and through the structural design of a first rotating shaft, a first bevel gear, a second bevel gear, a lead screw and a threaded sleeve, the service life of the backlight module body is prolonged. And through the structural design of a second rotating shaft, a third bevel gear, a fourth bevel gear and a third rotating shaft, the liquid crystal display screen is driven to rotate in the horizontal direction, the angle of the liquid crystal display screen is adjusted, a user can use the liquid crystal display screen in a correct posture, and the watching comfort of the user is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid crystal display, and more specifically to a backlight module and a liquid crystal display device. Background Art

[0002] Liquid crystal display is a flat, ultra-thin display device that consists of a certain number of color or black and white pixels and is placed in front of a light source or a reflective surface. The display backlight module is a light source located behind the liquid crystal display. Its luminous effect will directly affect the visual effect of the liquid crystal display module.

[0003] A Chinese patent document with publication number CN219715875U in the prior art provides a backlight module for a liquid crystal display screen. The utility model forms an overall frame structure through side panels and end panels. After protecting the backlight light source panel, it adopts a combined form and can be independently disassembled and placed in a small space, so as to solve the problem that in the existing backlight module, a frame is generally set on the side of the backlight light source panel to wrap its corners to achieve the effect of corner protection, but the additional frame structure has a single applicability and can only perform protection operations, with limited functions.

[0004] However, the backlight module still has the following shortcomings: the existing backlight module generally uses a heat conductive sheet for heat dissipation, which results in low heat dissipation efficiency of the backlight module, and the temperature of the backlight module is not easy to drop quickly during use, which easily leads to damage to the backlight module parts.

[0005] A Chinese patent document with publication number CN219715875U in the prior art provides a liquid crystal display screen, which is provided with a rotational connection between a rotating plate and a display screen body, and a sliding connection between an arc-shaped limit groove and a buffer column, and at the same time, the counterweight block and the buffer column function, so that protective support can be provided when the display screen backlight module body is skewed, and buffering can be provided through the sliding connection between the buffer chamber and the piston.

[0006] However, the LCD screen still has the following shortcomings: it is not convenient for users to adjust the LCD screen horizontally and in height, and users need to adjust their position and sitting posture according to the position of the LCD screen, which affects the user's viewing effect. In view of this, we propose a backlight module and a liquid crystal display device. Utility Model Content

[0007] 1. Technical issues to be solved

[0008] The utility model aims to provide a backlight module and a liquid crystal display device to solve the problems in the above background technology that the existing backlight module has low heat dissipation efficiency and the liquid crystal display screen is not easy to adjust.

[0009] 2. Technical solution

[0010] A backlight module comprises a backlight module body, wherein a fixed box is bolted to the left side of the backlight module body, a motor is bolted to the center of the left side of the inner cavity of the fixed box, an output shaft of the motor is fixedly connected to a driving gear, the top and bottom of the driving gear are meshed with driven gears, an inner cavity key of the driven gear is connected to a connecting shaft, the left side of the connecting shaft is rotatably connected to the left side of the inner cavity of the fixed box through a bearing, and a fan blade is bolted to the right side of the connecting shaft.

[0011] Preferably, filter nets are embedded in the top and bottom of the left side of the fixed box, and through grooves are sequentially opened on the right side of the fixed box from top to bottom.

[0012] A liquid crystal display device comprises a backlight module as described in any one of the above items, including a bottom box and a shell body, the inner cavity of the bottom box is provided with a height adjustment mechanism for adjusting the height of the shell body, the top of the height adjustment mechanism passes through the bottom box and is bolted to the shell body, the inner cavity of the shell body is provided with a rotating mechanism for rotating the shell body, a liquid crystal panel is installed on the right side of the inner cavity of the shell body, the left side of the liquid crystal panel is bolted to the right side of the backlight module body, and the backlight module body and the fixed box are both installed in the inner cavity of the shell body.

[0013] Preferably, the height adjustment mechanism includes a first rotating shaft, a first bevel gear, a second bevel gear, a screw and a threaded sleeve. The left side of the bottom box is rotatably connected to the first rotating shaft through a bearing, the surface key of the first rotating shaft is connected to the first bevel gear, the top of the first bevel gear is meshed with the second bevel gear, the inner cavity key of the second bevel gear is connected to the screw, the bottom of the screw is rotatably connected to the bottom of the inner cavity of the bottom box through a bearing, the surface of the screw is threadedly connected to the threaded sleeve, the top of the threaded sleeve passes through the bottom box and is bolted to the bottom of the box body, and the left side of the first rotating shaft is bolted to the first handle.

[0014] Preferably, the rotating mechanism includes a second rotating shaft, a third bevel gear, a fourth bevel gear and a third rotating shaft. The left side of the housing is rotatably connected to the second rotating shaft through a bearing, the surface key of the second rotating shaft is connected to the third bevel gear, the top of the third bevel gear is meshed with the fourth bevel gear, the inner cavity key of the fourth bevel gear is connected to the third rotating shaft, the bottom of the third rotating shaft is rotatably connected to the bottom of the inner cavity of the housing through a bearing, and the top of the third rotating shaft passes through the housing and is bolted to the bottom of the shell.

[0015] Preferably, a second handle is bolted to the left side of the second rotating shaft, and a plurality of clamping holes are formed on the surface of the second handle.

[0016] Preferably, a partition is bolted to the top of the left side of the box body, a spring is fixedly connected to the top of the partition, and a fixed block is fixedly connected to the top of the spring, a clamping rod is bolted to the left side of the bottom of the fixed block, and the bottom of the clamping rod passes through the partition and is clamped with the inner cavity of the clamping hole.

[0017] Preferably, both sides of the inner cavity of the bottom box are provided with sliding grooves, the inner cavity of the sliding grooves is slidably connected with sliders, and the opposite sides of the sliders are bolted to the two sides of the threaded sleeve.

[0018] Preferably, a sealing gasket is bonded to the top of the inner cavity of the bottom box, and the inner side of the sealing gasket is in contact with the surface of the threaded sleeve.

[0019] Preferably, a sealing ring is bonded to the top of the inner cavity of the box body, and the inner ring of the sealing ring is in contact with the surface of the third rotating shaft.

[0020] 3. Beneficial effects

[0021] Compared with the prior art, the advantages of the present invention are:

[0022] 1. The utility model adopts the structural design of the motor, the driving gear, the driven gear, the connecting shaft and the fan blades to cool the backlight module body with air through the fan blades, thereby preventing the backlight module body from being overheated during long-term use.

[0023] 2. The utility model can drive the LCD screen to move upward through the structural design of the first rotating shaft, the first bevel gear, the second bevel gear, the lead screw and the threaded sleeve, and drive the LCD screen to rotate horizontally through the structural design of the second rotating shaft, the third bevel gear, the fourth bevel gear and the third rotating shaft, so as to adjust the angle of the LCD screen, so that the user can use it in a correct posture, thereby improving the viewing comfort of the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the backlight module structure of the utility model;

[0025] Figure 2 This is a cross-sectional view of the fixed box structure of the utility model;

[0026] Figure 3 This is a front view of the motor and fan blade structure of the utility model;

[0027] Figure 4 It is a schematic diagram of the structure of the liquid crystal display device of the utility model;

[0028] Figure 5 This is a cross-sectional view of the structure of the liquid crystal display screen of the utility model;

[0029] Figure 6 This is a cross-sectional view of the bottom box and box structure of the utility model;

[0030] Figure 7 For the utility model Figure 6 An enlarged view of the structure at point A is shown.

[0031] Explanation of the numbers in the figure: 1. backlight module body; 2. fixing box; 3. motor; 4. driving gear; 5. driven gear; 6. connecting shaft; 7. bottom box; 8. housing; 9. height adjustment mechanism; 91. first rotating shaft; 92. first bevel gear; 93. second bevel gear; 94. screw rod; 95. threaded sleeve; 10. rotating mechanism; 101. second rotating shaft; 102. third bevel gear; 103. fourth bevel gear; 104. third rotating shaft; 11. liquid crystal panel; 12. housing; 13. partition; 14. fixing block; 15. slide groove. DETAILED DESCRIPTION

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] In the description of the present invention, "plurality" means two or more than two, unless otherwise clearly and specifically defined.

[0034] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0035] See also Figure 1-7 ,The utility model provides a technical solution:

[0036] A backlight module comprises a backlight module body 1, a fixed box 2 is bolted to the left side of the backlight module body 1, a motor 3 is bolted to the center of the left side of the inner cavity of the fixed box 2, an output shaft of the motor 3 is fixedly connected to a driving gear 4, a driven gear 5 is meshed at the top and the bottom of the driving gear 4, a connecting shaft 6 is keyed to the inner cavity of the driven gear 5, a left side of the connecting shaft 6 is rotatably connected to the left side of the inner cavity of the fixed box 2 through a bearing, a fan blade is bolted to the right side of the connecting shaft 6, and the backlight module body 1 is air-cooled by the fan blade to prevent the backlight module body 1 from being overheated due to long-term use.

[0037] Continue to refer to the instruction manual Figure 2 , the fixed box 2 in this embodiment is specifically described; the top and bottom of the left side of the fixed box 2 are embedded with filter screens, and the right side of the fixed box 2 is sequentially opened with through grooves from top to bottom to filter the air entering the fixed box 2 to prevent dust from entering the fixed box 2.

[0038] A liquid crystal display device includes a backlight module as proposed in the embodiment, including a bottom box 7 and a shell 8, the inner cavity of the bottom box 7 is provided with a height adjustment mechanism 9 for adjusting the height of the shell 8, the top of the height adjustment mechanism 9 passes through the bottom box 7 and is bolted to a box body 12, the inner cavity of the box body 12 is provided with a rotating mechanism 10 for rotating the shell 8, a liquid crystal panel 11 is installed on the right side of the inner cavity of the shell 8, the left side of the liquid crystal panel 11 is bolted to the right side of the backlight module body 1, and the backlight module body 1 and the fixed box 2 are both installed in the inner cavity of the shell 8.

[0039] Continue to refer to the instruction manual Figure 6 , the height adjustment mechanism 9 in this embodiment is specifically described; the height adjustment mechanism 9 includes a first rotating shaft 91, a first bevel gear 92, a second bevel gear 93, a screw rod 94 and a threaded sleeve 95. The left side of the bottom box 7 is rotatably connected with the first rotating shaft 91 through a bearing, the surface key of the first rotating shaft 91 is connected with the first bevel gear 92, the top of the first bevel gear 92 is meshed with the second bevel gear 93, the inner cavity key of the second bevel gear 93 is connected with the screw rod 94, the bottom of the screw rod 94 is rotatably connected with the bottom of the inner cavity of the bottom box 7 through a bearing, the surface of the screw rod 94 is threadedly connected with the threaded sleeve 95, the top of the threaded sleeve 95 penetrates the bottom box 7 and is bolted to the bottom of the box body 12, and the left side of the first rotating shaft 91 is bolted with a first handle, which can drive the LCD screen to move upward, so that the user can use it in a correct posture, thereby improving the user's viewing comfort.

[0040] Continue to refer to the instruction manual Figure 6, the rotating mechanism 10 in this embodiment is described in detail; the rotating mechanism 10 includes a second rotating shaft 101, a third bevel gear 102, a fourth bevel gear 103 and a third rotating shaft 104. The left side of the housing 12 is rotatably connected with the second rotating shaft 101 through a bearing, the surface key of the second rotating shaft 101 is connected with the third bevel gear 102, the top of the third bevel gear 102 is meshed with the fourth bevel gear 103, the inner cavity key of the fourth bevel gear 103 is connected with the third rotating shaft 104, the bottom of the third rotating shaft 104 is rotatably connected with the bottom of the inner cavity of the housing 12 through a bearing, the top of the third rotating shaft 104 passes through the housing 12 and is bolted to the bottom of the shell 8, which can drive the liquid crystal display screen to rotate horizontally, so that the user can use it in a correct posture, which improves the viewing comfort of the user.

[0041] Continue to refer to the instruction manual Figure 7 , the second rotating shaft 101 in this embodiment is specifically described; a second handle is bolted to the left side of the second rotating shaft 101, and a plurality of card holes are opened on the surface of the second handle to facilitate the user to rotate the second rotating shaft 101.

[0042] Continue to refer to the instruction manual Figure 7 , the second handle in this embodiment is specifically described; a partition 13 is bolted to the top of the left side of the box body 12, a spring is fixedly connected to the top of the partition 13, and a fixing block 14 is fixedly connected to the top of the spring, a clamping rod is bolted to the left side of the bottom of the fixing block 14, and the bottom of the clamping rod passes through the partition 13 and is clamped with the inner cavity of the clamping hole, and the second handle is fixed after adjusting the angle of the LCD screen to prevent the LCD screen from rotating due to the rotation of the second handle, which affects the viewing effect of the user.

[0043] Continue to refer to the instruction manual Figure 6 , the threaded sleeve 95 in this embodiment is specifically described; both sides of the inner cavity of the bottom box 7 are provided with a slide groove 15, the inner cavity of the slide groove 15 is slidably connected with a slider, and the opposite side of the slider is bolted to the two sides of the threaded sleeve 95, the threaded sleeve 95 is limited, the auxiliary threaded sleeve 95 is moved, and the stability of the threaded sleeve 95 is improved.

[0044] Continue to refer to the instruction manual Figure 6 , the bottom box 7 in this embodiment will be specifically described; a sealing gasket is bonded to the top of the inner cavity of the bottom box 7, and the inner side of the sealing gasket is in contact with the surface of the threaded sleeve 95, thereby improving the sealing performance of the bottom box 7.

[0045] Continue to refer to the instruction manual Figure 7 , the box body 12 in this embodiment will be specifically described; a sealing ring is bonded to the top of the inner cavity of the box body 12, and the inner ring of the sealing ring is in contact with the surface of the third rotating shaft 104, thereby improving the sealing performance of the box body 12.

[0046] Working principle: when in use, the motor 3 is turned on, and the motor 3 drives the active gear 4 to rotate, thereby driving the driven gear 5 to rotate, and then driving the connecting shaft 6 to rotate, and then the connecting shaft 6 drives the fan blades to rotate, so as to cool down the backlight module body 1. When it is necessary to adjust the height of the LCD screen, the user turns the first handle, and the first handle drives the first rotating shaft 91 to rotate, thereby driving the first bevel gear 92 to rotate, and then driving the second bevel gear 93 to rotate, and then the second bevel gear 93 drives the screw rod 94 to rotate, thereby driving the threaded sleeve 95 to move upward, and then driving the bottom box 7 to move upward. At this time, the bottom box 7 drives the LCD screen to move upward, so as to achieve the purpose of adjusting the height of the LCD screen. When it is necessary to adjust the angle of the LCD screen, the user moves the fixed block 14 upward, and the fixed block 14 stretches the spring while driving the card rod to move upward. Then the user turns the second handle, and the second handle drives the second rotating shaft 101 to rotate, thereby driving the third bevel gear 102 to rotate, and then driving the fourth bevel gear 103 to rotate. At this time, the fourth bevel gear 103 drives the third rotating shaft 104 to rotate, thereby driving the LCD screen to rotate, so as to achieve the purpose of adjusting the angle of the LCD screen.

[0047] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A backlight module, comprising a backlight module body (1), characterized in that: The left side of the backlight module body (1) is bolted to a fixed box (2), the center of the left side of the inner cavity of the fixed box (2) is bolted to a motor (3), the output shaft of the motor (3) is fixedly connected to a driving gear (4), the top and bottom of the driving gear (4) are meshed with a driven gear (5), the inner cavity key of the driven gear (5) is connected to a connecting shaft (6), the left side of the connecting shaft (6) is rotatably connected to the left side of the inner cavity of the fixed box (2) through a bearing, and the right side of the connecting shaft (6) is bolted to a fan blade.

2. The backlight module according to claim 1, characterized in that: The top and bottom of the left side of the fixed box (2) are both embedded with filter screens, and the right side of the fixed box (2) is sequentially provided with through grooves from top to bottom.

3. A liquid crystal display device, comprising the backlight module according to any one of claims 1 to 2, characterized in that: The invention comprises a bottom box (7) and a shell (8); the inner cavity of the bottom box (7) is provided with a height adjustment mechanism (9) for adjusting the height of the shell (8); the top of the height adjustment mechanism (9) passes through the bottom box (7) and is bolted to a box body (12); the inner cavity of the box body (12) is provided with a rotating mechanism (10) for rotating the shell (8); a liquid crystal panel (11) is installed on the right side of the inner cavity of the shell (8); the left side of the liquid crystal panel (11) is bolted to the right side of a backlight module body (1); the backlight module body (1) and the fixed box (2) are both installed in the inner cavity of the shell (8).

4. A liquid crystal display device according to claim 3, characterized in that: The height adjustment mechanism (9) comprises a first rotating shaft (91), a first bevel gear (92), a second bevel gear (93), a screw rod (94) and a threaded sleeve (95); the left side of the bottom box (7) is rotatably connected to the first rotating shaft (91) via a bearing; the surface key of the first rotating shaft (91) is connected to the first bevel gear (92); the top of the first bevel gear (92) is meshed with the second bevel gear (93); the inner cavity key of the second bevel gear (93) is connected to the screw rod (94); the bottom of the screw rod (94) is rotatably connected to the bottom of the inner cavity of the bottom box (7) via a bearing; the surface of the screw rod (94) is threadedly connected to the threaded sleeve (95); the top of the threaded sleeve (95) passes through the bottom box (7) and is bolted to the bottom of the box body (12); the left side of the first rotating shaft (91) is bolted to a first handle.

5. A liquid crystal display device according to claim 3, characterized in that: The rotating mechanism (10) comprises a second rotating shaft (101), a third bevel gear (102), a fourth bevel gear (103) and a third rotating shaft (104); the left side of the housing (12) is rotatably connected to the second rotating shaft (101) via a bearing; the surface key of the second rotating shaft (101) is connected to the third bevel gear (102); the top of the third bevel gear (102) is meshed with the fourth bevel gear (103); the inner cavity key of the fourth bevel gear (103) is connected to the third rotating shaft (104); the bottom of the third rotating shaft (104) is rotatably connected to the bottom of the inner cavity of the housing (12) via a bearing; the top of the third rotating shaft (104) passes through the housing (12) and is bolted to the bottom of the shell (8).

6. A liquid crystal display device according to claim 5, characterized in that: A second handle is bolted to the left side of the second rotating shaft (101), and a plurality of clamping holes are provided on the surface of the second handle.

7. A liquid crystal display device according to claim 3, characterized in that: A partition (13) is bolted to the top of the left side of the box body (12), a spring is fixedly connected to the top of the partition (13), and a fixed block (14) is fixedly connected to the top of the spring, a clamping rod is bolted to the left side of the bottom of the fixed block (14), and the bottom of the clamping rod passes through the partition (13) and is clamped to the inner cavity of the clamping hole.

8. A liquid crystal display device according to claim 3, characterized in that: Both sides of the inner cavity of the bottom box (7) are provided with sliding grooves (15), the inner cavity of the sliding groove (15) is slidably connected with a slider, and the opposite sides of the slider are bolted to the two sides of the threaded sleeve (95).

9. A liquid crystal display device according to claim 3, characterized in that: A sealing gasket is bonded to the top of the inner cavity of the bottom box (7), and the inner side of the sealing gasket is in contact with the surface of the threaded sleeve (95).

10. A liquid crystal display device according to claim 3, characterized in that: A sealing ring is bonded to the top of the inner cavity of the box body (12), and the inner ring of the sealing ring is in contact with the surface of the third rotating shaft (104).

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