TN vehicle screen

Abstract

This invention relates to the field of vehicle-mounted screen technology and discloses a TN vehicle-mounted screen, comprising: a waterproof housing, the waterproof housing including a bottom frame profile, two side covers, a top profile, and injection-molded plastic; a die-cast housing, the waterproof housing being fitted onto the die-cast housing, a first waterproof rubber ring being provided between the bottom of the die-cast housing and the bottom frame profile; and a display assembly, the display assembly including a display module, two liquid crystal display backlights, and two outer screens. The waterproof housing and die-cast housing design allow the die-cast housing to compress the first waterproof rubber ring on the bottom frame profile after installation, thereby achieving a good sealing and waterproof effect and effectively preventing malfunctions caused by water seepage. The injection-molded plastic is prepared using a secondary injection molding process, effectively avoiding signal interference to the signal transmitter and receiver, while also providing good waterproofing and aesthetic appeal.

Description

Technical Field

[0001] This invention relates to the field of vehicle display technology, specifically to TN vehicle displays. Background Technology

[0002] TN vehicle-mounted displays are display devices installed on the roof of taxis. They are mainly developed based on twisted nematic liquid crystal technology and have wide applications in the field of vehicle displays. Their core working principle is to use the specific angle twisting and arrangement of nematic liquid crystal molecules, combined with polarizers, to achieve the switching of light and thus display the required image content. In vehicle scenarios, TN vehicle-mounted displays effectively meet image display needs due to their relatively low cost and fast response speed. Existing taxis can display advertising, news, notices and other image information by installing TN vehicle-mounted displays on their roofs.

[0003] However, the existing technology has the following problems:

[0004] Existing vehicle screens are assembled from various prefabricated profiles, making the installation process complex and the production cycle long. Furthermore, due to the numerous gaps between the prefabricated profiles, the waterproofing effect is poor. In actual use, since the vehicle screen is located on the roof, if the waterproofing effect of the vehicle screen is poor when the vehicle is driving in the rain, water may enter the vehicle screen, leading to malfunctions. Summary of the Invention

[0005] The purpose of this invention is to provide a TN vehicle screen to solve the above-mentioned problems. It aims to overcome the shortcomings of existing vehicle screens, which are assembled from a variety of prefabricated profiles, have a relatively complex installation process, a long production cycle, and poor waterproofing due to the large number of installation gaps between the prefabricated profiles. Details are described below.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] The TN vehicle-mounted screen provided by this invention includes: a waterproof shell, the waterproof shell comprising a bottom frame profile, two side covers, a top profile, and injection-molded plastic, the bottom frame profile being connected to the bottom of the two side covers, the top profile being connected to the top of the two side covers, and the top of the top profile being provided with injection-molded plastic; a die-cast housing, the waterproof shell being fitted onto the die-cast housing, the bottom of the die-cast housing being connected to the bottom frame profile via a connector, a first waterproof rubber ring being provided between the bottom of the die-cast housing and the bottom frame profile, and a power supply, a cooling fan, a signal transmitter, and a signal receiver being installed on the die-cast housing; and a display assembly, the display assembly comprising a display module, two LCD display lamp panels, and two external screens, the display module being installed inside the die-cast housing, both LCD display lamp panels being installed on the die-cast housing, and the two external screens being respectively installed on the front and rear sides of the two side covers, the top profile, and the bottom frame profile.

[0008] As preferred, a liquid crystal window cover plate is installed on the side cover plate close to the display module, a second waterproof rubber ring is arranged between the liquid crystal window cover plate and the side cover plate, and the liquid crystal window cover plate is used for disassembling and repairing the display module.

[0009] As preferred, a through hole is arranged on the top profile, the injection plastic is installed on the through hole of the top profile by using a secondary injection process, the injection plastic plays a waterproof role, and the signal transmitter and the signal receiver are located below the injection plastic.

[0010] As preferred, the die-casting box is divided into a first die-casting box and a second die-casting box, the first die-casting box and the second die-casting box are symmetrically arranged, the first die-casting box and the second die-casting box are connected by a connecting piece, and the first die-casting box and the second die-casting box are both made of a die-casting process.

[0011] As preferred, the side cover plate and the bottom of the die-casting box are respectively provided with a heat dissipation air duct, and the heat dissipation air duct of the side cover plate is in communication with the heat dissipation air duct of the bottom of the die-casting box.

[0012] As preferred, the display module is integrated with a conversion chip, a multifunctional card and a receiving card, the display module is connected with the liquid crystal display screen lamp plate through a wire, and the two outer screens are respectively attached to the two liquid crystal display screen lamp plates.

[0013] As preferred, the waterproof shell is connected with a base at the bottom, the base is used for connecting with the roof of the vehicle, a protection assembly is arranged on the base, the protection assembly comprises two blocking rods, the two blocking rods are both rotatably installed on the inner wall of the base, the blocking rods protrude outside the base and are located at the front side of the waterproof shell, a plurality of steel wires are connected between the two blocking rods, a sliding block is horizontally and slidably connected in the base, the two ends of the sliding block are respectively connected with first sliding shafts, first slot rods are respectively connected with the two blocking rods, a sliding groove is arranged on the first slot rod, the two first sliding shafts are respectively and slidably connected with the sliding grooves of the two first slot rods, a plurality of springs are connected between the sliding block and the inner wall of the base, and when the two blocking rods swing towards the waterproof shell, the two first slot rods and the two first sliding shafts can drive the sliding block to move towards the blocking rods.

[0014] As preferred, the protection assembly further comprises two rotating rods, a connecting plate is installed in the base, both of the rotating rods are rotatably installed on the connecting plate, both of the rotating rods are mirror image arranged, an organ pipe is connected between the bottom surface of the rotating rod and the connecting plate, one end of both of the rotating rods close to each other is respectively connected with a second slot rod, a sliding groove is arranged on the second slot rod, two inclined grooves are arranged on the sliding block, a sliding seat is slidably connected in each of the inclined grooves, a second sliding shaft is connected on the sliding seat, both of the second sliding shafts are slidably connected with the sliding grooves of both of the second slot rods, when the sliding block moves towards the connecting plate, both of the second sliding shafts can be brought close to each other, when both of the second sliding shafts are close to each other, both of the rotating rods can be swung upwards through both of the second slot rods.

[0015] As preferred, a counting assembly is arranged on the base, the counting assembly comprises a counter, the counter is installed on the base, a counting dial is connected at the bottom of the counter, a contact block is slidably connected on the sliding block, when the contact block moves, the contact block can contact with the counting dial and trigger the counter to count, a lead screw is rotatably installed on the sliding block, the lead screw is threadedly connected with the contact block, an inspection window is arranged on the base.

[0016] The beneficial effects are that:

[0017] 1. The TN vehicle-mounted screen, through the setting of the waterproof shell and the die-casting box body, the die-casting box body can extrude the first waterproof rubber ring on the bottom frame profile after installation, thereby realizing good sealing and waterproof effect, effectively avoiding the case of water seepage causing failure; the injection molding plastic is made by using a secondary injection molding process, effectively avoiding signal interference to the signal transmitter and signal receiver, and also playing a good waterproof role and aesthetic effect; the die-casting box body is divided into two parts, a first die-casting box and a second die-casting box, and the molds are separately made, so that the production and processing are more convenient, and the production cost is lower, achieving the technical effect of reducing production difficulty and cost.

[0018] 2. The TN vehicle-mounted screen, through the setting of the protection assembly, when the vehicle passes through the area under the tree, the lower branches first contact the two blocking rods and the plurality of steel wires, intercepting the branches to avoid collision with the outer screen, and after the two blocking rods and the plurality of steel wires are separated from the branches, the two blocking rods are reset by the elastic force of the springs, which can shake off the leaves and impurities attached to the surface, avoiding impurities from blocking the image display of the outer screen.

[0019] 3. The TN vehicle-mounted screen, through the setting of the counting assembly, the counter will count once every time the driver performs a forceful emergency stop, the counter can be locked by the supervisor, and the supervisor can observe the count on the counter regularly, if the number of emergency stops exceeds the reasonable number, the driver can be subject to corresponding examination, and the supervisor can adjust the emergency stop force required to trigger the count by rotating the lead screw, which is convenient for the supervisor to adjust according to the actual situation. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the display component structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the die-cast box structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the waterproof outer shell structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the protective component structure of the present invention;

[0026] Figure 6 This is a schematic diagram of the slider structure of the present invention;

[0027] Figure 7 This is a schematic diagram of the rotating rod structure of the present invention;

[0028] Figure 8 This is a schematic diagram of the second sliding shaft structure of the present invention;

[0029] Figure 9 This is a schematic diagram of the counting component structure of the present invention;

[0030] Figure 10 This is a schematic diagram of the lead screw structure of the present invention.

[0031] The annotations in the attached figures are explained as follows:

[0032] 1. Waterproof outer shell; 11. Bottom frame profile; 12. Side cover plate; 13. LCD window cover plate; 14. Second waterproof rubber ring; 15. Top profile; 16. Injection molded plastic; 17. First waterproof rubber ring;

[0033] 2. Display components; 21. Display module; 22. LCD display backlight panel; 23. External screen;

[0034] 3. Die-casting box; 31. First die-casting box; 32. Second die-casting box;

[0035] 4. Power supply;

[0036] 5. Radiating fan;

[0037] 6. Signal transmitter;

[0038] 7. Signal receiver;

[0039] 8. Base; 81. Inspection window;

[0040] 9. Guard assembly; 91. Guard bar; 92. Steel wire; 93. Sliding block; 94. Spring; 95. First sliding shaft; 96. First slot rod; 97. Connecting plate; 98. Turning rod; 99. Organ strip; 910. Second slot rod; 911. Inclined slot; 912. Sliding seat; 913. Second sliding shaft;

[0041] 10. Counting assembly; 101. Counter; 102. Counting dial; 103. Abutting block; 104. Screw rod. DETAILED DESCRIPTION

[0042] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described in detail below. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present application.

[0043] Embodiment 1

[0044] The existing vehicle-mounted screen is assembled by various prefabricated profiles, and the installation process is relatively complex, the production cycle is relatively long, and due to the installation gaps between the prefabricated profiles, the waterproof effect is poor, and in actual use, since the vehicle-mounted screen is on the roof of the vehicle, when the vehicle drives in rainy days, if the waterproof effect of the vehicle-mounted screen is poor, the vehicle-mounted screen will be waterlogged and cause failure. In order to solve the above problems, the embodiment is invented.

[0045] Please refer to Figure 1 - Figure 5 , TN vehicle-mounted screen, comprising: a waterproof shell 1, the waterproof shell 1 comprises a bottom frame profile 11, two side cover plates 12, a top profile 15 and an injection molded plastic 16, the bottom frame profile 11 is connected with the bottom of the two side cover plates 12, the top profile 15 is connected with the top of the two side cover plates 12, and the top of the top profile 15 is provided with the injection molded plastic 16; the bottom frame profile 11, the two side cover plates 12, the top profile 15 and the injection molded plastic 16 constitute the whole of the waterproof shell 1, and the connection gaps are all sealed, wherein the bottom frame profile 11, the two side cover plates 12 and the top profile 15 are main supporting components, mainly playing the roles of protection and waterproof.

[0046] The die-casting box body 3, the waterproof shell 1 is sleeved on the die-casting box body 3, the bottom of the die-casting box body 3 is connected with the bottom edge frame profile 11 through the connecting piece, the first waterproof rubber ring 17 is arranged between the bottom of the die-casting box body 3 and the bottom edge frame profile 11, the power supply 4, the cooling fan 5, the signal transmitter 6 and the signal receiver 7 are installed on the die-casting box body 3; the power supply 4 is used for power supply, the cooling fan 5 is used for heat dissipation, the signal transmitter 6 and the signal receiver 7 are used for sending and receiving signals, the die-casting box body 3 is the core framework, when assembling, the waterproof shell 1 is sleeved on the die-casting box body 3 and connected by the connecting piece, the connecting gap between the die-casting box body 3 and the waterproof shell 1 is located at the contact part of the die-casting box body 3 and the bottom edge frame profile 11, the die-casting box body 3 can extrude the first waterproof rubber ring 17 on the bottom edge frame profile 11 after installation, thereby realizing good sealing and waterproof effect, the bottom of the die-casting box body 3 is also sealed, therefore, the effect of all-round sealing is realized, and the situation that water seepage causes failure is effectively avoided.

[0047] The display assembly 2 comprises a display module 21, two liquid crystal display screen lamp plates 22 and two outer screens 23, the display module 21 is installed in the die-casting box body 3, the two liquid crystal display screen lamp plates 22 are both installed on the die-casting box body 3, and the two outer screens 23 are respectively installed on the front side and the rear side of the two side cover plates 12, the top profile 15 and the bottom edge frame profile 11; the connecting parts of the outer screen 23 and the two side cover plates 12, the top profile 15 and the bottom edge frame profile 11 all adopt the glue sealing process, and good water seepage prevention effect is achieved; the display module 21 is a core functional part, is used for receiving and processing image signals, converting the image signals into displayable image data, and then displaying through the two liquid crystal display screen lamp plates 22.

[0048] Further, the liquid crystal window cover plate 13 is installed on the side cover plate 12 close to the display module 21, the second waterproof rubber ring 14 is arranged between the liquid crystal window cover plate 13 and the side cover plate 12, the liquid crystal window cover plate 13 is used for disassembling and maintaining the display module 21, and the liquid crystal window cover plate 13 is installed on the side cover plate 12 through the connecting piece; when the display module 21 needs to be maintained, the liquid crystal window cover plate 13 can be disassembled; when installing, the second waterproof rubber ring 14 needs to be aligned with the connecting gap between the liquid crystal window cover plate 13 and the side cover plate 12; after installation, the liquid crystal window cover plate 13 and the side cover plate 12 extrude the second waterproof rubber ring 14, and good waterproof sealing effect is achieved.

[0049] In addition, the top profile 15 has through holes. The injection-molded plastic 16 is installed on the through holes of the top profile 15 using a two-stage injection molding process. The injection-molded plastic 16 serves a waterproof function. The signal transmitter 6 and the signal receiver 7 are located below the injection-molded plastic 16. The through holes of the top profile 15 are used to prevent the top profile 15 from blocking the signals of the signal transmitter 6 and the signal receiver 7, while the injection-molded plastic 16 serves to cover the through holes and provide waterproofing. The conventional way to deal with the through holes of the top profile 15 is to use adhesive to cover and install a cover plate. This method will form a relatively obvious glue seam, affecting the aesthetics, and there is also a risk of glue separation after long-term use. However, by creating the through holes of the top profile 15 and then using a two-stage injection molding process to prepare the injection-molded plastic 16, the top profile 15 and the injection-molded plastic 16 can form a whole. While providing good protection and waterproofing, the connection gap between the top profile 15 and the injection-molded plastic 16 is more concealed, and the overall appearance is more aesthetically pleasing.

[0050] In addition, the die-casting box 3 is divided into a first die-casting box 31 and a second die-casting box 32. The first die-casting box 31 and the second die-casting box 32 are symmetrically arranged and connected by a connector. Both the first die-casting box 31 and the second die-casting box 32 are made by die-casting process. Since the mold making of the die-casting box 3 as a whole is relatively difficult and the production cost is high, the die-casting box 3 is divided into two parts, the first die-casting box 31 and the second die-casting box 32, and the molds are made separately for each part. This makes the production and processing more convenient and the production cost is lower. Furthermore, the connection between the first die-casting box 31 and the second die-casting box 32 by the connector can also provide good stability, achieving the technical effect of reducing production difficulty and cost.

[0051] It is worth noting that the bottom of the side cover plate 12 and the die-casting box 3 are respectively provided with heat dissipation air ducts. The heat dissipation air duct of the side cover plate 12 is connected to the heat dissipation air duct at the bottom of the die-casting box 3. When air is blown to the heat dissipation air duct of the side cover plate 12, the air flows along the heat dissipation air duct. Some of the air can flow along the heat dissipation air duct of the side cover plate 12 to the heat dissipation air duct at the bottom of the die-casting box 3, thereby promoting the air flow in the side cover plate 12 and the bottom of the die-casting box 3, increasing the contact area between the flowing air per unit time and the side cover plate 12 and the die-casting box 3, and thus improving the heat dissipation effect.

[0052] It is worth noting that the display module 21 integrates a conversion chip, a multi-function card, and a receiver card. The display module 21 is connected to the LCD display backlight board 22 via wires. The two outer screens 23 are respectively attached to the two LCD display backlight boards 22. The receiver card is used to receive external image signals, the multi-function card is used to filter and expand auxiliary signals, and the conversion chip is used to convert the received electrical signals into image data that can drive the display. The conversion chip, multi-function card, and receiver card work together to form the core driving unit for screen display. The display module 21 transmits the image data to the LCD display backlight board 22 via wires for image display. The two outer screens 23 are used to protect the two LCD display backlight boards 22, providing dust and water protection without affecting the use of the LCD display backlight boards 22.

[0053] Example 2

[0054] Based on the above embodiment, during the vehicle's operation, since the vehicle frequently passes under the trees and some branches are low, some branches may collide with the outer screen 23, causing damage to the outer screen 23. This embodiment is invented to solve the above problem.

[0055] Please see Figure 1 , Figure 5 - Figure 9A base 8 is connected to the bottom of the waterproof outer shell 1. The base 8 is used to connect to the roof of the vehicle. A protective component 9 is provided on the base 8. The protective component 9 includes two stop bars 91, both of which are rotatably mounted on the inner wall of the base 8. The stop bars 91 protrude from the outside of the base 8 and are located on the front side of the waterproof outer shell 1. Multiple steel wires 92 are connected between the two stop bars 91. A slider 93 is horizontally slidably connected inside the base 8. The two ends of the slider 93 are respectively connected to the first sliding shafts 95. The two stop bars 91 are respectively connected to the first groove rods 96. The first groove rods 96 have sliding grooves. The two first sliding shafts 95 are slidably connected to the sliding grooves of the two first groove rods 96. Multiple springs 94 are connected between the slider 93 and the inner wall of the base 8. When the two stop bars 91 swing towards the waterproof outer shell 1, they can drive the slider 93 to move towards the stop bars 91 through the two first groove rods 96 and the two first sliding shafts 95. When the vehicle passes under the trees, the lower branches first contact the two stop bars 91 and the multiple springs 94. The steel wires 92 make contact and intercept the tree branch, preventing it from colliding with the outer screen 23. While multiple steel wires 92 serve an intercepting function, they are not easily noticeable from a distance, thus not affecting the image display effect of the outer screen 23. When intercepting the tree branch, the two baffles 91 and the multiple steel wires 92 are pushed towards the base 8 by the branch's reaction force. Simultaneously, the two baffles 91 swing and, through the two first groove rods 96 and the two first sliding shafts 95, drive the slider 93 towards the baffles 91. During this process, the slider 93 compresses multiple springs 94, causing them to deform and thus providing a buffering effect. When the tree branch slides along the two baffles 91 and the multiple steel wires 92 until it is no longer in contact, the multiple springs 94 use their elasticity to reset the slider 93 and the two baffles 91. After the two baffles 91 and the multiple steel wires 92 reset using their elasticity, they can shake off any leaves and impurities attached to their surface, preventing impurities from obstructing the image display of the outer screen 23.

[0056] The protective assembly 9 also includes two rotating rods 98. A connecting plate 97 is installed inside the base 8. Both rotating rods 98 are rotatably mounted on the connecting plate 97. The two rotating rods 98 are mirror images of each other. A gusset bar 99 connects the bottom surface of the rotating rods 98 to the connecting plate 97. The ends of the two rotating rods 98 closest to each other are respectively connected to second groove rods 910. The second groove rods 910 are provided with sliding grooves. The slider 93 has two inclined grooves 911. The two inclined grooves 911 are mirror images of each other in a figure-eight shape. Sliding blocks 912 are slidably connected to the two inclined grooves 911 respectively. Second sliding shafts 913 are connected to the sliding blocks 912. The two second sliding shafts 913 are slidably connected to the sliding grooves of the two second groove rods 910 respectively. When the slider 93 moves towards the connecting plate 97, it can drive the two second sliding shafts 913 to move closer to each other. When the sliding shafts 913 approach each other, they can drive the two rotating rods 98 to swing upward through the two second groove rods 910. When the slider 93 moves towards the stop rod 91, the two inclined grooves 911 above it move synchronously, so that the two inclined grooves 911 respectively actuate the two second sliding shafts 913, causing the two second sliding shafts 913 to approach each other and drive the two rotating rods 98 to swing upward through the two second groove rods 910. When the rotating rods 98 swing upward, the accordion strips 99 between the rotating rods 98 and the connecting plate 97 can unfold like a folding fan, so that the two rotating rods 98 and the two accordion strips 99 can cover most of the outer screen 23 after unfolding, providing temporary protection for the outer screen 23 and preventing small branches from directly contacting the outer screen 23 and causing scratches to the outer screen 23, thus minimizing the probability of damage to the outer screen 23.

[0057] Example 3

[0058] Based on the above embodiments, since some drivers frequently brake suddenly while driving, causing discomfort to passengers, and it is difficult to monitor the driver's frequent sudden braking behavior, this embodiment is invented to solve the above problems.

[0059] Please see Figure 7 , Figure 10 A counting component 10 is provided on the base 8. The counting component 10 includes a counter 101, which is mounted on the base 8. A counting paddle 102 is connected to the bottom of the counter 101. A contact block 103 is slidably connected to the slider 93. When the contact block 103 moves, it can contact the counting paddle 102 and trigger the counter 101 to count. A lead screw 104 is rotatably mounted on the slider 93 and is threadedly connected to the contact block 103. An inspection window 81 is provided on the base 8. (Reference) Figure 1In terms of direction, assuming the vehicle is traveling from back to front, when the vehicle brakes suddenly, slider 93 will move forward due to inertia. As slider 93 moves forward, it will cause contact block 103 to move forward synchronously. When the braking force is large, causing slider 93 to have a large displacement, contact block 103 will move forward until it contacts counting paddle 102, thereby triggering counter 101 to count. Therefore, every time the driver performs a large-force sudden stop, counter 101 will count once. Control personnel can lock counter 101 and periodically observe the count on counter 101. If the number of sudden stops exceeds a reasonable number, the driver can be assessed accordingly. When it is necessary to adjust the sudden braking force required to trigger the count, open inspection window 81 and use a screwdriver to turn screw 104. When screw 104 rotates, it can drive contact block 103 to move horizontally through the threaded connection, thereby adjusting the initial distance between contact block 103 and counting paddle 102, and thus adjusting the distance that slider 93 needs to move to trigger counter 101 to count, thereby adjusting the sudden braking force required to trigger the count, which is convenient for control personnel to adjust according to the actual situation.

[0060] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. 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the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell 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connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car roof, and the waterproof shell (1) is connected with the waterproof shell (1) of the car ​ ​ ​ ​ ​ 2. The TN in-vehicle screen according to claim 1, characterized in that: ​ 3. The TN in-car screen according to claim 1, characterized in that: The top profile (15) is provided with a through hole, and the injection plastic (16) is installed on the through hole of the top profile (15) by using a secondary injection process.

4. The TN in-vehicle screen of claim 1, wherein: The first die-casting box (31) and the second die-casting box (32) are both made by using a die-casting process.

5. The TN in-vehicle screen of claim 1, wherein: The side cover plate (12) and the bottom of the die-casting box body (3) are respectively provided with heat dissipation air ducts, and the heat dissipation air duct of the side cover plate (12) is communicated with the heat dissipation air duct of the bottom of the die-casting box body (3).

6. The TN in-vehicle screen of claim 1, wherein: The display module (21) is integrated with a conversion chip, a multifunctional card and a receiving card, the display module (21) is connected with the liquid crystal display lamp plate (22) through wires, and the two outer screens (23) are respectively attached to the two liquid crystal display lamp plates (22); the receiving card is used for receiving external image signals, the multifunctional card is used for assisting in screening and expanding signals, and the conversion chip is used for converting received electrical signals into image data that can be driven to display.

7. The TN in-car screen according to claim 1, characterized in that: The protection assembly (9) further comprises two rotating rods (98), the base (8) is provided with a connecting plate (97), the two rotating rods (98) are rotatably installed on the connecting plate (97), the two rotating rods (98) are mirror image arranged, the connecting plate (97) is connected with the rotating rods (98) through the organ pipe strips (99), the second slot rods (910) are respectively connected to one end of the two rotating rods (98) close to each other, the second slot rods (910) are provided with sliding grooves, the sliding block (93) is provided with two inclined grooves (911), the two inclined grooves (911) are respectively slidably connected with sliding seats (912), the sliding seats (912) are connected with second sliding shafts (913), the second sliding shafts (913) are respectively slidably connected with the sliding grooves of the two second slot rods (910), when the sliding block (93) moves towards the connecting plate (97), the two second sliding shafts (913) can be brought close to each other, and when the two second sliding shafts (913) are close to each other, the two rotating rods (98) can be swung upwards through the two second slot rods (910).

8. The TN in-vehicle screen of claim 7, wherein: The base (8) is provided with a counting assembly (10), the counting assembly (10) comprises a counter (101), the counter (101) is installed on the base (8), the counter (101) is connected with a counting dial (102) at the bottom, the sliding block (93) is slidably connected with a contact block (103), when the contact block (103) moves, the contact block (103) can contact the counting dial (102) and trigger the counter (101) to count, the sliding block (93) is rotatably installed with a lead screw (104), the lead screw (104) is threadedly connected with the contact block (103), and the base (8) is provided with an inspection window (81).

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