Vehicle-mounted display screen and armrest box

Abstract

The utility model relates to the technical field of vibration display screens, in particular to a vehicle-mounted display screen and an armrest box, the vehicle-mounted display screen comprises a touch display screen assembly, a backlight module, a vibration unit, a middle frame, a PCB assembly, a vibration reduction unit and a rear shell, a first containing groove is formed in one side of the backlight module, and a second containing groove is formed in the other side of the backlight module. One side of the touch display screen assembly is installed in the first containing groove and electrically connected with the backlight module, the vibration unit is installed on the other side of the backlight module and electrically connected with the backlight module, the middle frame is of a hollow structure and arranged on the periphery of the backlight module in a sleeving mode, a second containing groove is formed in one side of the rear shell, and the vibration unit is electrically connected with the second containing groove. The PCB assembly is installed in the second containing groove and electrically connected with the backlight module, one side of the rear shell is connected with the other side of the backlight module, the vibration reduction unit is arranged at the connecting position of the rear shell and the backlight module, the display screen is embedded into the armrest box, and a face cover is arranged on the display screen in a covering mode. According to the utility model, the resonance effect of the armrest box can be improved to enhance the vibration feedback of the display screen.

Description

Technical Field

[0001] The utility model relates to the technical field of vibration display screens, and more specifically, to a vehicle-mounted display screen and an armrest box. Background Art

[0002] The in-vehicle display screen is an indispensable part of modern cars. As the core of the infotainment system, the in-vehicle display screen can display navigation maps, media control interfaces, and integrate call logs and personalized settings, allowing drivers to enjoy music and navigation while reducing their dependence on mobile phones and ensuring safety during driving. In order to enhance the user experience, touch screen vibration feedback can also be added, which means that after pressing the virtual button on the screen, there will be a vibration feedback to the finger, letting the operator know that the operation is successful. Since more attention needs to be paid to road traffic when driving, vibration is of great significance. It can remind the driver whether the operation is successful, improve the efficiency of blind operation, avoid driver distraction, and reduce safety hazards. However, the in-vehicle display screen with vibration function will bring resonance effect to the surrounding environment. The resonance effect will cause vibration energy loss, thereby weakening the vibration feedback of the display screen.

[0003] Prior art Chinese patent CN202121458218.3 discloses a vibration feedback device for an automotive interior touch-sensitive part with a shrapnel, comprising a vibrating component, a fixing component, and a vibrating shrapnel, wherein a vibration chamber is provided on the fixing component, the vibrating component is arranged in the vibration chamber via the vibrating shrapnel, the fixing component is used to drive the vibrating component to vibrate in the vibration chamber, the vibrating component comprises a metal front frame and a display screen assembly, the front end surface of the metal front frame is provided with a display screen mounting groove, and the display screen assembly is arranged in the display screen mounting groove. The display screen assembly of the present utility model is mounted on the metal front frame, and the metal front frame is fixed in the vibration chamber of the metal rear frame via the vibrating shrapnel. When vibration feedback is required, the metal front frame is driven to vibrate in the vibration chamber by a solenoid vibration motor, and the metal front frame is driven to reset by the vibrating shrapnel. However, when the device is connected to the car, its vibration feedback will be weakened due to the resonance effect. Utility Model Content

[0004] The purpose of the present invention is to overcome the deficiency of the prior art in that vibration feedback is weakened due to the resonance effect. The present invention proposes a vehicle-mounted display screen and an armrest box, which can reduce the vibration transmission to the rear shell, thereby improving the resonance effect to enhance the vibration feedback of the display screen.

[0005] To achieve the above-mentioned purpose, the present technical solution provides a vehicle-mounted display screen, including a touch screen assembly, a backlight module, a vibration unit, a middle frame, a PCB assembly, a vibration reduction unit and a rear shell. A first accommodating groove is provided on one side of the backlight module, one side of the touch screen assembly is installed in the first accommodating groove and is electrically connected to the backlight module, the vibration unit is installed on the other side of the backlight module and is electrically connected to the backlight module, the middle frame is a hollow structure, and the middle frame is sleeved on the outer periphery of the backlight module, a second accommodating groove is provided on one side of the rear shell, the PCB assembly is installed in the second accommodating groove and is electrically connected to the backlight module, one side of the rear shell is connected to the other side of the backlight module, and the vibration reduction unit is provided at the connection between the rear shell and the backlight module.

[0006] In this technical solution, when the user interacts through the touch display assembly, the vibration unit will vibrate the touch display assembly and the backlight module to provide vibration feedback to the user. Since the rear shell is connected to the interior of the car, the vibration unit will produce a resonance effect on the surrounding environment when it is working. At this time, the vibration reduction unit can reduce the vibration transmitted to the PCB assembly and the rear shell. On the premise of improving the resonance effect, it can also increase the tactile sensation of the front human hand touch area. In the structure of this vehicle-mounted display screen, the middle frame protects the backlight module while widening the internal space, ensuring that the PCB assembly is separated from the backlight module to avoid the vibration being directly transmitted to the PCB assembly and causing the vibration energy of the vibration unit to be lost. The user's fingers feel the vibration more strongly, thereby improving the user experience.

[0007] As a preferred solution, in order to widen the internal space to separate the backlight module and the PCB assembly, connecting columns are respectively provided at the four corners of the other side of the backlight module, and the four vibration-damping units are respectively connected to the connecting columns. The four corners of the rear shell are respectively connected to the connecting columns through fasteners. Since the vibration will be transmitted to the rear shell along the connecting columns on the backlight module, by installing the vibration-damping unit on the connecting columns, the transmission of vibration can be reduced, thereby improving the resonance effect.

[0008] As a preferred solution, the vibration reduction unit is a spring sheet with a cross-shaped structure, which is thinner. The bent part of the spring sheet can consume vibration energy to achieve a vibration reduction effect. The four corners in the second accommodating groove respectively form mounting platforms that are adapted to the structure of the vibration reduction unit. Positioning columns are respectively provided at both ends of the mounting platform. The two ends of each vibration reduction unit are respectively mounted on the positioning columns and fixed by fasteners. The middle part of each vibration reduction unit is respectively mounted on the fasteners between the rear shell and the backlight module.

[0009] As a preferred solution, the touch display assembly includes CG, OCA, FOG and a first panel, and the CG, OCA and FOG are laminated in sequence, the area of the CG is larger than the area of the OCA and FOG, the OCA and FOG are placed in a first accommodating groove, the CG cover is arranged on the end face of the backlight module, the first panel is installed on the other side of the backlight module and is electrically connected to the backlight module, the edge of the backlight module is provided with an air avoidance groove, the FOG is connected to a first flexible cable, one end of the first flexible cable passes through the air avoidance groove and is connected to the first panel, and by setting the air avoidance groove for wiring, the structure of the display screen is more compact, the space utilization rate is high, the proportion of the display area is increased, and the black edge of the screen is reduced.

[0010] As a preferred solution, in order to fix the vibration unit, a third accommodating groove is formed in the middle of the other side of the backlight module, and the vibration unit is installed in the third accommodating groove.

[0011] As a preferred solution, in order to protect the vibration unit, the edge of the vibration unit protrudes outward to form a first connecting portion, and the first connecting portion is connected to the edge of the third accommodating groove through a fastener, so that the vibration unit is suspended in the third accommodating groove, and a gap is formed between the outer wall of the vibration unit and the inner wall of the third accommodating groove. The gap adapts to the amplitude of the vibration unit to ensure that the vibration unit does not collide with the inside of the third accommodating groove when working, thereby avoiding energy loss, wherein the first connecting portion is rigidly connected to the edge of the third accommodating groove through a fastener, and the vibration energy of the vibration unit is directly transmitted to the backlight module through the groove wall of the third accommodating groove, thereby retaining the vibration energy to the maximum extent.

[0012] As a preferred solution, in order to prevent interference signals, protect components, and improve circuit performance, the PCB assembly includes a second panel and a shielding cover. The shielding cover is arranged on the side of the second panel close to the rear shell. The second panel is connected to the backlight module through a second flexible cable. The second panel and the shielding cover are installed in the second accommodating groove through fasteners.

[0013] As a preferred solution, in order to protect the backlight module, the middle frame is connected to the other side of the backlight module through fasteners, and the side of the middle frame close to the rear shell is provided with a snap-fitting portion adapted to the inner wall structure of the second accommodating groove, and the snap-fitting portion is snapped into the second accommodating groove. The middle frame increases the distance between the rear shell and the backlight module to separate the backlight module and the PCB assembly.

[0014] As a preferred solution, the backlight module is die-casted from magnesium alloy. Compared with sheet metal parts, magnesium alloy die-cast parts have higher strength and can ensure that feedback is directly transmitted to the front of the touch display assembly during touch vibration, reducing energy loss. The backlight module formed by magnesium alloy die-cast parts is convenient for forming hole structures. The display screen composed of it is thinner than that of sheet metal products, saving intermediate parts, eliminating gaps and part wall thicknesses in the black border area, and having lower manufacturing costs. It can reduce the black border of the display screen to a certain extent.

[0015] In order to achieve the above-mentioned purpose, an armrest box of the present technical solution includes the above-mentioned vehicle-mounted display screen, and also includes an armrest box body and a surface cover. The peripheral side of the rear shell protrudes outward to form a second connecting part. The vehicle-mounted display screen is embedded in the armrest box body and the rear shell is connected to the armrest box body through fasteners. The surface cover is arranged on one side of the vehicle-mounted display screen and is connected to the armrest box body.

[0016] In this technical solution, the vehicle-mounted display screen is embedded in the armrest box body to present an immersive integrated effect, thereby improving the user experience. The cover further fixes the vehicle-mounted display screen to increase the fixing strength or rigidity, thereby improving the resonance problem.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. The present invention provides vibration feedback to users when they touch the screen through a vibration unit installed on one side of the backlight module, and then weakens the vibration conduction at the connection between the rear shell and the backlight module through a vibration reduction unit, thereby improving the resonance phenomenon of the rear shell with the surrounding environment and enhancing the vibration feedback of the display screen.

[0019] 2. Connecting the middle frame with a hollow structure to the backlight module not only protects the backlight module, but also widens the space inside the display screen, so that a gap is formed between the backlight module and the PCB assembly to avoid the loss of energy transmission.

[0020] 3. By placing the touch screen assembly in the first receiving groove of the backlight module, the space utilization rate of the display screen is high, and the coverage area of the display region can be increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of the vehicle-mounted display screen of the utility model;

[0022] Figure 2 This is a diagram of an explosion of the car display;

[0023] Figure 3 It is a cross-sectional view of the vehicle display screen;

[0024] Figure 4 It is a structural diagram of the backlight module;

[0025] Figure 5 This is the installation diagram of the middle frame;

[0026] Figure 6 It is a schematic diagram of the connection between the vibration reduction unit and the rear shell;

[0027] Figure 7 It is a schematic diagram of the installation of PCB components;

[0028] Figure 8 This is a structural diagram of the armrest box of the utility model;

[0029] Figure 9 It is a schematic diagram of the cross-sectional structure of the armrest box.

[0030] In the figure: touch screen assembly 1; CG11; OCA12; FOG13; first panel 14; first flexible cable 15; first adhesive tape 16; backlight module 2; first accommodating groove 21; connecting column 22; third accommodating groove 23; air-avoiding groove 24; vibration unit 3; first connecting part 31; middle frame 4; clamping part 41; second adhesive tape 42; PCB assembly 5; second panel 51; shielding cover 52; second flexible cable 53; vibration damping unit 6; rear shell 7; second accommodating groove 71; mounting platform 72; positioning column 721; second connecting part 73; cover 8; armrest box body 9. DETAILED DESCRIPTION

[0031] The drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate the embodiments, some components in the drawings may be omitted, enlarged, or reduced in size, and do not represent actual product dimensions. Those skilled in the art will understand that some well-known structures and their descriptions may be omitted from the drawings. The positional relationships depicted in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0032] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "long", "short", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0033] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0034] Example 1:

[0035] This embodiment is a first embodiment of a vehicle-mounted display screen. Figure 1 、 2 As shown, it includes a touch display screen assembly 1, a backlight module 2, a vibration unit 3, a middle frame 4, a PCB assembly 5, a vibration reduction unit 6 and a rear shell 7. One side of the backlight module 2 is provided with a first accommodating groove 21, one side of the touch display screen assembly 1 is installed in the first accommodating groove 21 and is electrically connected to the backlight module 2, the vibration unit 3 is installed on the other side of the backlight module 2 and is electrically connected to the backlight module 2, the middle frame 4 is a hollow structure, and the middle frame 4 is sleeved on the outer periphery of the backlight module 2, one side of the rear shell 7 is provided with a second accommodating groove 71, the PCB assembly 5 is installed in the second accommodating groove 71 and is electrically connected to the backlight module 2, one side of the rear shell 7 is connected to the other side of the backlight module 2, and the vibration reduction unit 6 is provided at the connection between the rear shell 7 and the backlight module 2.

[0036] In this embodiment, the vibration unit 3 is a vibration motor, which can interact with the touch screen assembly 1 to provide vibration feedback to the user and enhance the user experience. In order to increase the display area ratio of the touch screen assembly 1 and reduce the black edge, a magnesium alloy die-cast backlight module 2 is used to provide support for the touch screen assembly 1, thereby ensuring the structural strength and reducing the frame size.

[0037] Specifically, such as Figure 4 、 5 The four corners of the other side of the backlight module 2 are respectively provided with connecting columns 22, and the four vibration reduction units 6 are respectively connected to the connecting columns 22. The four corners of the rear shell 7 are respectively connected to the connecting columns 22 by fasteners. The vibration reduction unit 6 is a spring piece with a cross-shaped structure. Figure 6 、 7 As shown, the four corners of the second accommodating groove 71 respectively form mounting platforms 72 that are adapted to the structure of the vibration reduction unit 6. Positioning columns 721 are respectively provided at both ends of the mounting platform 72. The two ends of each vibration reduction unit 6 are respectively sleeved on the positioning columns 721 and fixed by fasteners. The middle part of each vibration reduction unit 6 is respectively sleeved on the fasteners between the rear shell 7 and the backlight module 2.

[0038] In this embodiment, the fasteners are screws, and the thickness of the vibration-damping unit 6 is 0.3 mm, which can improve the vibration-damping effect of the vibration-damping unit 6 .

[0039] Specifically, the touch display assembly 1 includes CG11, OCA12, FOG13 and a first panel 14. The CG11, OCA12 and FOG13 are attached in sequence. The area of the CG11 is larger than the area of the OCA12 and FOG13. The OCA12 and FOG13 are placed in a first accommodating groove 21. The CG11 covers the end face of the backlight module 2. The first panel 14 is installed on the other side of the backlight module 2 and is electrically connected to the backlight module 2. The edge of the backlight module 2 is provided with an air avoidance groove 24. The FOG13 is connected to a first flexible flat cable 15. One end of the first flexible flat cable 15 passes through the air avoidance groove 24 and is connected to the first panel 14.

[0040] In this embodiment, if Figure 2 As shown, the CG11 and the FOG13 are attached via the OCA12 , and the CG11 is attached to the front surface of the backlight module 2 via the first adhesive tape 16 , so as to seal the first receiving groove 21 .

[0041] Specifically, a third accommodating groove 23 is formed in the middle of the other side of the backlight module 2 , and the vibration unit 3 is installed in the third accommodating groove 23 .

[0042] In this embodiment, since the backlight module 2 is formed by magnesium alloy die-casting, the third accommodating groove 23 formed therein can better transmit vibration to the backlight module 2 and the touch screen assembly 1 , and the third accommodating groove 23 can protect the vibration unit 3 .

[0043] Specifically, the PCB assembly 5 includes a second panel 51 and a shielding cover 52. The shielding cover 52 is covered on the side of the second panel 51 close to the rear shell 7. The second panel 51 is connected to the backlight module 2 through the second flexible cable 53. The second panel 51 and the shielding cover 52 are installed in the second accommodating groove 71 through fasteners.

[0044] In this embodiment, if Figure 7 As shown, the PCB assembly 5 is offset from the mounting platform 72 , wherein the second panel 51 and the vibration unit 3 form a 4.2 mm gap, which can prevent the vibration of the vibration unit 3 from being transmitted to the second panel 51 .

[0045] Specifically, the middle frame 4 is connected to the other side of the backlight module 2 through fasteners, and a snap-fitting portion 41 adapted to the inner wall structure of the second accommodating groove 71 is provided on the side of the middle frame 4 close to the rear shell 7, and the snap-fitting portion 41 is snap-fitted to the second accommodating groove 71.

[0046] In this embodiment, if Figure 2 、 5As shown, the backlight module 2 and the middle frame 4 are also bonded together by a second tape 42 , wherein both the first tape 16 and the second tape 42 are VHB tapes. The second tape 42 can enhance the sealing and bonding strength between the middle frame 4 and the backlight module 2 .

[0047] Example 2:

[0048] This embodiment is similar to embodiment 1, except that, in this embodiment, Figure 3 As shown, the edge of the vibration unit 3 protrudes outward to form a first connecting portion 31, and the first connecting portion 31 is connected to the edge of the third accommodating groove 23 through a fastener, forming a gap between the outer wall of the vibration unit 3 and the inner wall of the third accommodating groove 23.

[0049] In this embodiment, the gap is accumulated according to the external dimension tolerances of the backlight module 2 and the vibration unit 3, specifically: a gap of 0.5 mm is formed between the vibration unit 3 and the left and right walls of the third accommodating groove 23, a gap of 1 mm is formed between the vibration unit 3 and the upper and lower walls of the third accommodating groove 23, and a gap of 0.5 mm is formed between the vibration unit 3 and the bottom of the third accommodating groove 23. This gap can prevent the vibration unit 3 from colliding with the backlight module 2 during vibration. Based on the structural dimensions of the cast magnesium alloy and the accumulated external dimension tolerances of the motor itself, the actual manufacturing four sigma process capability is simultaneously taken into consideration, thereby ensuring the reliability of the reserved gap design.

[0050] Example 3:

[0051] This embodiment is a first embodiment of an armrest box. Figure 8 、 9 As shown, it includes the above-mentioned vehicle-mounted display screen, and also includes an armrest box body 9 and a surface cover 8. The peripheral side of the rear shell 7 protrudes outward to form a second connecting portion 73. The vehicle-mounted display screen is embedded in the armrest box body 9 and the rear shell 7 is connected to the armrest box body 9 through fasteners. The surface cover 8 is arranged on one side of the vehicle-mounted display screen and is connected to the armrest box body 9.

[0052] In this embodiment, if Figure 6 、 7As shown, a positioning hole and a mounting hole are provided on the second connecting portion 73, and buckles are respectively provided on the left and right sides of the rear shell 7. The front side of the armrest box body 9 is recessed inward to form a mounting groove, and a positioning structure is provided in the mounting groove. After the display screen is embedded in the mounting groove, the buckle is clamped in the mounting groove. After the positioning structure and the positioning hole are positioned, the mounting hole is fixed in the mounting groove by fasteners. The second connecting portion 73 is provided with a first reinforcement structure and a second reinforcement structure. The first reinforcement structure is provided on two opposite sides of the second connecting portion, and the second reinforcement structure is provided between the first reinforcement structure, and the area of the first reinforcement structure is larger than that of the second reinforcement structure. In order to improve the fixing strength or rigidity of the display screen and the armrest box body 9, the fastener fixing points of the surface cover 8 are correspondingly increased to fix it on the armrest box body 9, thereby improving the rigidity of the surface cover 8 and improving the resonance problem of the surrounding environment.

[0053] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

[0054] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. A person skilled in the art will be able to make other variations or modifications based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A vehicle-mounted display screen, characterized in that: The invention comprises a touch screen assembly (1), a backlight module (2), a vibration unit (3), a middle frame (4), a PCB assembly (5), a vibration reduction unit (6) and a rear shell (7), wherein one side of the backlight module (2) is provided with a first accommodating groove (21), one side of the touch screen assembly (1) is installed in the first accommodating groove (21) and is electrically connected to the backlight module (2), and the vibration unit (3) is installed on the other side of the backlight module (2) and is electrically connected to the backlight module ( 2) electrical connection, the middle frame (4) is a hollow structure, the middle frame (4) is sleeved on the outer periphery of the backlight module (2), one side of the rear shell (7) is provided with a second accommodating groove (71), the PCB assembly (5) is installed in the second accommodating groove (71) and is electrically connected to the backlight module (2), one side of the rear shell (7) is connected to the other side of the backlight module (2), and the vibration reduction unit (6) is provided at the connection between the rear shell (7) and the backlight module (2).

2. The vehicle-mounted display screen according to claim 1, characterized in that: The four corners of the other side of the backlight module (2) are respectively provided with connecting columns (22), the four vibration reduction units (6) are respectively connected to the connecting columns (22), and the four corners of the rear shell (7) are respectively connected to the connecting columns (22) via fasteners.

3. The vehicle-mounted display screen according to claim 2, characterized in that: The vibration reduction unit (6) is a spring piece with a cross-shaped structure. The four corners of the second accommodating groove (71) respectively form a mounting platform (72) adapted to the structure of the vibration reduction unit (6). Positioning columns (721) are respectively provided at both ends of the mounting platform (72). The two ends of each vibration reduction unit (6) are respectively sleeved on each positioning column (721) and fixed by fasteners. The middle part of each vibration reduction unit (6) is respectively sleeved on each fastener between the rear shell (7) and the backlight module (2).

4. The vehicle-mounted display screen according to claim 1, characterized in that: The touch screen assembly (1) comprises a CG (11), an OCA (12), a FOG (13) and a first panel (14); the CG (11), the OCA (12) and the FOG (13) are sequentially attached; the area of the CG (11) is larger than the areas of the OCA (12) and the FOG (13); the OCA (12) and the FOG (13) are placed in a first receiving groove (21); the CG (11) is covered on the end face of the backlight module (2); the first panel (14) is installed on the other side of the backlight module (2) and is electrically connected to the backlight module (2); an air-avoidance groove (24) is provided on the edge of the backlight module (2); the FOG (13) is connected to a first flexible flat cable (15); one end of the first flexible flat cable (15) passes through the air-avoidance groove (24) and is connected to the first panel (14).

5. The vehicle-mounted display screen according to claim 1, characterized in that: A third accommodating groove (23) is formed in the middle of the other side of the backlight module (2), and the vibration unit (3) is installed in the third accommodating groove (23).

6. The vehicle-mounted display screen according to claim 5, characterized in that: The edge of the vibration unit (3) protrudes outward to form a first connecting portion (31), and the first connecting portion (31) is connected to the edge of the third accommodating groove (23) through a fastener, and a gap is formed between the outer wall of the vibration unit (3) and the inner wall of the third accommodating groove (23).

7. The vehicle-mounted display screen according to claim 1, characterized in that: The PCB assembly (5) comprises a second panel (51) and a shielding cover (52), wherein the shielding cover (52) is arranged on a side of the second panel (51) close to the rear housing (7), the second panel (51) is connected to the backlight module (2) via a second flexible flat cable (53), and the second panel (51) and the shielding cover (52) are mounted in the second receiving groove (71) via fasteners.

8. The vehicle-mounted display screen according to claim 1, characterized in that: The middle frame (4) is connected to the other side of the backlight module (2) via a fastener, and a clamping portion (41) adapted to the inner wall structure of the second accommodating groove (71) is provided on a side of the middle frame (4) close to the rear shell (7), and the clamping portion (41) is clamped to the second accommodating groove (71).

9. The vehicle-mounted display screen according to any one of claims 1 to 8, characterized in that: The backlight module (2) is formed by die-casting of a magnesium alloy.

10. An armrest box, characterized in that: A vehicle-mounted display screen comprising any one of claims 1 to 9, further comprising an armrest box body (9) and a face cover (8), wherein the peripheral side of the rear shell (7) protrudes outward to form a second connecting portion (73), the vehicle-mounted display screen is embedded in the armrest box body (9) and the rear shell (7) is connected to the armrest box body (9) via fasteners, and the face cover (8) is arranged on one side of the vehicle-mounted display screen and is connected to the armrest box body (9).

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