Display device for a vehicle

Abstract

The application relates to the field of automobile display technology and provides a display device for an automobile. One side of the top of the mounting shell is obliquely provided with a sliding groove, a display screen is slidably arranged in the sliding groove, a sliding driving assembly is arranged in a containing groove below the sliding groove, the sliding groove is communicated with the containing groove, the end of the display screen is hingedly connected with a hinged seat, the sliding driving assembly is connected with the hinged seat to drive the display screen to slide out or retract, the end surface of the sliding groove is provided with an avoiding opening, and the slid-out display screen is erected at the avoiding opening through the hinged structure. The application realizes flexible switching of the display screen according to the needs of stretching out for use and storage and hiding, avoids affecting the appearance and collision damage caused by long-term exposure, the erected angle is suitable for the observation of drivers, and the driving safety is improved.

Description

Technical Field

[0001] This application relates to the technical field of automotive parts, and more specifically, to a display device for automobiles. Background Technology

[0002] With the rapid development of automotive intelligence and electrification, more and more automakers are adopting dashboard-less designs. For example, some Tesla models have eliminated the traditional instrument panel, integrating driving information such as vehicle speed and battery level into the central control screen or head-up display (HUD) system. In addition, Volkswagen has also proposed a technical solution to replace the instrument panel with mobile devices such as smartphones or tablets. This involves installing a detachable mobile device bracket in the original instrument panel position in front of the steering wheel, with the mobile device taking over the instrument display function.

[0003] However, the aforementioned dashboard-less solutions still have many shortcomings in practical use. For models like Tesla that have eliminated the dashboard, drivers must shift their gaze from directly in front of the vehicle to the central control screen to read critical information such as vehicle speed, posing a certain driving safety hazard. As for solutions that use mobile devices such as smartphones to replace the dashboard, the users need to provide and install these devices themselves, which not only makes it difficult to guarantee installation stability, but also makes the devices prone to loosening or falling due to vibrations during vehicle operation, resulting in insufficient reliability. Furthermore, although some existing technologies include designs that add display devices near the steering column or steering stalk, these devices are usually fixed installations, with the display screen always exposed, affecting the aesthetics of the interior and making it susceptible to damage from accidental collisions when not in use. Summary of the Invention

[0004] To address the issues of adding a display screen to a car without an instrument panel affecting the car's interior aesthetics and making it susceptible to damage, this application provides a display device for automobiles.

[0005] An automotive display device includes a mounting housing with an inwardly recessed groove on one side of its top. The groove is inclined, and a display screen is slidably mounted on the mounting housing within the groove. A receiving groove is provided below the groove, and a sliding drive assembly is disposed within the receiving groove. The groove communicates with the receiving groove. A hinged seat is hinged to the end of the display screen away from the groove port. The sliding drive assembly is connected to the hinged seat, and the display screen is driven to slide out of or retract from the groove via the sliding drive assembly. A clearance opening is provided on the end face of the groove, allowing the display screen to stand upright at the clearance opening when it slides out of the groove, through the hinged connection between the display screen and the hinged seat.

[0006] By adopting the above technical solution, an inclined sliding groove is provided on one side of the top of the mounting shell, and the display screen is slidably placed in the sliding groove. At the same time, a sliding drive component is provided in the receiving groove below the sliding groove. The sliding drive component is connected to the hinge seat at the end of the display screen, which can drive the display screen to slide out of the sliding groove or retract, realizing the flexible switching between extending and hiding the display screen as needed. This effectively solves the problem that existing fixed display devices are always exposed, affecting the aesthetics of the vehicle interior and are easily damaged by collisions. In addition, the clearance opening provided on the end face of the sliding groove, together with the hinge structure between the display screen and the hinge seat, allows the display screen to stand upright at the clearance opening after sliding out of the sliding groove, thereby ensuring that the display screen is presented at a suitable viewing angle for the driver after being extended, significantly improving driving safety.

[0007] Preferably, guide grooves are provided on both opposite sides of the display screen, and guide limiting components are provided on both opposite side walls of the mounting shell at the clearance opening. The guide limiting components are inserted into the guide grooves and slide within the guide grooves.

[0008] By adopting the above technical solution, guide grooves are set on opposite sides of the display screen, and guide limiting components are set on opposite side walls of the mounting shell clearance opening. By having the guide limiting components pass into the guide grooves and slide along the guide grooves, precise guiding constraints can be provided for the sliding and retraction process of the display screen, ensuring that the display screen has a stable posture and accurate trajectory during lifting and lowering movements. This effectively avoids the phenomenon of display screen shaking or jamming caused by vehicle vibration, and further improves the working reliability and usage stability of the device.

[0009] Preferably, the guide limiting assembly includes a ball bearing embedded in the inner wall of the clearance opening and a ball plunger connected to the inner ring of the ball bearing. The ball plunger is connected to the inner ring of the ball bearing to enable the main body of the ball plunger to rotate. The guide groove is a stepped groove, which includes a first groove and a second groove communicating with the first groove. The first groove is fitted with the ball of the ball plunger, and the ball of the ball plunger passes into the first groove and abuts against the inner wall of the first groove. The second groove is fitted with the main body of the ball plunger, and the main body of the ball plunger passes into the second groove and abuts against the inner wall of the second groove.

[0010] By adopting the above technical solution, the guide and limiting component uses a ball bearing embedded in the inner wall of the clearance opening and a ball plunger connected to the inner ring of the ball bearing. The ball bearing enables the main body of the ball plunger to rotate. At the same time, the guide groove is designed as a stepped groove structure including a first groove and a second groove. The first groove matches the ball of the ball plunger, and the second groove matches the main body of the ball plunger. This structure not only ensures smooth rolling cooperation between the ball plunger and the guide groove, but also achieves precise constraint on the movement trajectory of the display screen through the limiting effect of the stepped groove, effectively reducing sliding friction resistance, making the extension and retraction of the display screen smoother and quieter, and improving the wear resistance and service life of the guide and limiting component.

[0011] Preferably, the driving stroke of the sliding drive assembly is longer than the length of the guide groove. When the guide limiting assembly slides to the end of the guide groove, the sliding drive assembly further drives the display screen to move forward. The display screen is flipped up and stood up by the push of the hinge seat and the pull of the guide limiting assembly.

[0012] By adopting the above technical solution, the driving stroke of the sliding drive component is set to be longer than the length of the guide groove. When the guide limit component slides to the end of the guide groove, the sliding drive component continues to drive the display screen to move forward. At this time, the display screen is flipped and erected under the combined action of the push of the hinge seat and the pull of the guide limit component. Through the phased differential control of the driving stroke, the display screen can complete the two consecutive actions of translation extension and flipping and erection under the same driving action. There is no need to add an additional flipping drive source, which simplifies the device structure, reduces manufacturing costs, and ensures the accuracy and stability of the final erected posture of the display screen.

[0013] Preferably, the sliding drive assembly includes a lead screw and a servo motor. The lead screw is disposed in the receiving groove and rotatably connected to the mounting housing. The servo motor is disposed in the receiving groove and fixedly connected to the mounting housing. The servo motor is connected to the lead screw and is used to drive the lead screw to rotate in both directions. The lead screw is screwed to the hinge seat.

[0014] By adopting the above technical solution, the sliding drive component uses a combination structure of lead screw and servo motor. The servo motor drives the lead screw to rotate in both directions. The lead screw is screwed to the hinge seat to realize the reciprocating linear motion of the hinge seat and the display screen. This lead screw transmission method has the advantages of high transmission accuracy, smooth movement and good self-locking performance. It can ensure that the display screen can reliably stay at any extended position and effectively resist the displacement risk caused by vehicle driving bumps. At the same time, the servo motor is easy to realize intelligent control and can flexibly adjust the extension speed and position of the display screen according to driving needs.

[0015] Preferably, the hinge seat includes a nut sleeve and two hinge arms arranged at intervals on the nut sleeve. The tail end of the display screen is provided with a lug, which is engaged between the two hinge arms. An opening is provided between the two hinge arms and the lug. A hinge shaft passes through the three openings. The hinge shaft and the openings of the two hinge arms are interference fit. The opening of the lug is transition fit with the hinge shaft, and there is a damping force between the hinge shaft and the lug.

[0016] By adopting the above technical solution, the hinge seat includes a nut sleeve and two hinge arms arranged at intervals. The lug at the rear end of the display screen is inserted between the two hinge arms. The hinge shaft passes through the three openings. The hinge shaft and the openings of the two hinge arms are interference-fitted to ensure the relative fixation of the hinge seat and the hinge shaft. The opening of the lug and the hinge shaft are transition-fitted and there is a damping force between them. This damping fit structure allows the display screen to obtain appropriate rotational resistance during the flipping and standing process. This ensures that the display screen flipping action is smooth and not loose, and that the display screen can maintain a stable standing posture by relying on the damping force after standing. It effectively prevents the display screen from falling back due to vehicle vibration, and significantly improves the display stability and vibration resistance of the display device in driving conditions.

[0017] Preferably, the mounting housing includes a housing with an open bottom and closed sides, and a base bracket disposed inside the housing. The base bracket is fixed to the housing by bolts. The base bracket and the top of the housing form a mounting cavity. The sliding groove extends from one side of the mounting housing into the mounting cavity. The bottom of the mounting cavity forms the receiving groove. The sliding drive assembly is fixed to the base bracket.

[0018] By adopting the above technical solution, the mounting shell adopts a split structure of a shell with an open bottom and closed sides and an internal base. The base and the shell are fixed together by bolts, and the two form a mounting cavity. The sliding groove extends from one side of the mounting shell into the mounting cavity, and a receiving groove is formed at the bottom of the mounting cavity to accommodate the sliding drive component. This split assembly structure greatly facilitates the installation, debugging and subsequent maintenance of the display screen, sliding drive component and hinge seat, reduces the difficulty of production assembly and maintenance costs, and ensures the simple and beautiful overall appearance.

[0019] Preferably, the bottom of the housing is provided with a latch, and the housing replaces the top housing of the car steering rod and is fixed to other housings by the latch.

[0020] By adopting the above technical solution, a latch is set at the bottom of the housing, which allows the housing to replace the top shell of the car steering rod and be fixed with other shells through the latch. This achieves a stable and non-destructive installation of the display device and the steering rod. The display device can be integrated into the field of vision in front of the steering wheel without complicated modifications to the original vehicle. This not only ensures the reliability and vibration resistance of the installation, but also makes the display device blend into the original car interior, further improving the overall aesthetics of the car interior and the user's convenience.

[0021] The beneficial technical effects of this application are as follows: A recessed, inclined slide groove is provided on one side of the top of the mounting housing, and the display screen is slidably positioned within this groove. A sliding drive assembly is located in a receiving slot below the slide groove. This assembly is connected to a hinged base at the end of the display screen, enabling the display screen to slide out of or retract from the slide groove. This allows for flexible switching between on-demand use and concealment of the display screen, effectively solving the problem of existing fixed display devices being constantly exposed, affecting the aesthetics of the vehicle interior, and being susceptible to collision damage. Furthermore, the recessed opening on the end face of the slide groove, combined with the hinged structure between the display screen and the hinged base, allows the display screen to stand upright at the recessed opening after sliding out of the slide groove. This ensures that the display screen is presented at a suitable viewing angle for the driver after being extended, significantly improving driving safety. Attached Figure Description

[0022] Figure 1 This is a diagram showing the state where the display screen is hidden in a display device for automobiles according to this embodiment.

[0023] Figure 2 This is a diagram showing the extended display screen of a display device for automobiles according to this embodiment.

[0024] Figure 3 This is a schematic diagram of the connection structure between the mounting shell and the limiting guide assembly in this embodiment.

[0025] Figure 4 This is a schematic diagram of the first connection structure of the display screen, hinge base, sliding drive assembly and guide limiting assembly in this embodiment.

[0026] Figure 5 This is a schematic diagram of the second connection structure of the display screen, hinge base, sliding drive assembly and guide limiting assembly in this embodiment.

[0027] Figure 6 This is a schematic diagram of the guide and limit assembly in this embodiment.

[0028] Reference numerals: 1. Mounting housing; 11. Housing; 111. Clearance opening; 112. Lock; 12. Base support; 13. Slide groove; 14. Receiving groove; 2. Sliding drive assembly; 21. Lead screw; 22. Servo motor; 3. Display screen; 31. Lug; 32. Guide groove; 321. First groove; 322. Second groove; 4. Hinge seat; 41. Nut sleeve; 42. Hinge arm; 43. Hinge shaft; 5. Guide and limit assembly; 51. Ball bearing; 52. Ball plunger; Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] Reference Figure 1-4 An automotive display device includes a mounting housing 1, which comprises a shell 11 that is open at the bottom and closed on all sides. A base support 12 is disposed inside the shell 11, and the base support 12 is fixedly connected to the shell 11 by bolts, together forming a mounting cavity. A recessed groove 13 is formed on one side of the top of the shell 11, extending inward from one side of the shell 11 into the interior of the mounting cavity. The groove 13 is inclined to allow the extension direction of the display screen 3 to adapt to the driver's viewing angle. A clearance opening 111 communicating with the groove 13 is provided on the top surface of the shell 11. A receiving groove 14 is formed at the bottom of the mounting cavity, located directly below and communicating with the groove 13. A sliding drive assembly 2 is fixedly installed on the base 12. The sliding drive assembly 2 includes a lead screw 21 and a servo motor 22. The lead screw 21 is arranged in the receiving groove 14 along the length direction of the mounting shell 1 and is rotatably connected to the base 12. The servo motor 22 is also arranged in the receiving groove 14 and is fixedly connected to the base 12. The output end of the servo motor 22 is connected to the lead screw 21 for driving the lead screw 21 to achieve forward and reverse rotation.

[0031] Reference Figure 3-4A display screen 3 is slidably mounted inside the slide groove 13. When not extended, the display screen 3 is completely retracted into the slide groove 13, achieving a concealed storage effect. A hinge seat 4 is hinged to the tail end of the display screen 3 away from the port of the slide groove 13. The hinge seat 4 includes a nut sleeve 41 and two hinge arms 42 arranged at intervals on the nut sleeve 41. The nut sleeve 41 is fitted onto the outside of the lead screw 21 and forms a threaded connection with the lead screw 21. When the lead screw 21 rotates, it drives the nut sleeve 41 to reciprocate along the axis of the lead screw 21. A lug 31 is provided at the tail end of the display screen 3. The lug 31 engages with the space between the two hinge arms 42. Openings are provided on both hinge arms 42 and the lug 31. A hinge shaft 43 passes through the three openings after they are aligned. The hinge shaft 43 and the openings on the two hinge arms 42 are connected by an interference fit, so that the hinge shaft 43 remains fixed relative to the hinge seat 4. The opening of the lug 31 is connected to the hinge shaft 43 by an transition fit. Both the hinge shaft 43 and the lug 31 are made of damping material, and there is an appropriate damping force between the hinge shaft 43 and the lug 31, so that the display screen 3 needs to overcome a certain frictional resistance when rotating around the hinge shaft 43. Through the above-mentioned hinge structure, the display screen 3 can rotate around the hinge shaft 43 relative to the hinge seat 4, so that it has the ability to flip and stand up after sliding out of the slide groove 13.

[0032] Reference Figure 4-6 Guide grooves 32 are recessed on both opposite side walls of the display screen 3, extending along the length of the display screen 3, and are specifically designed as stepped grooves. Each stepped groove includes a first groove 321 and a second groove 322 connected to the first groove 321, wherein the width of the first groove 321 is smaller than the width of the second groove 322. Guide limiting components 5 are provided on both opposite side walls of the clearance opening 111 of the mounting housing 1. Each guide limiting component 5 includes a ball bearing 51 embedded in the inner wall of the clearance opening 111 and a ball plunger 52 connected to the inner ring of the ball bearing 51. The main body of the ball plunger 52 is connected to the inner ring of the ball bearing 51, allowing the main body of the ball plunger 52 to rotate freely via the ball bearing 51. The ball of the ball plunger 52 enters the first groove 321 and abuts against the inner wall of the first groove 321, while the main body of the ball plunger 52 enters the second groove 322 and abuts against the inner wall of the second groove 322. When the display screen 3 slides in the slide groove 13, the ball of the ball plunger 52 rolls along the first groove 321, while the main body of the ball plunger 52 slides along the second groove 322. The two work together to provide precise guidance and constraint for the sliding trajectory of the display screen 3.

[0033] Furthermore, the driving stroke of the sliding drive component 2 is longer than the length of the guide groove 32.

[0034] Reference Figure 1-2 and Figure 4-5 The overall working process of the automotive display device is as follows: When the display screen 3 needs to be extended, the servo motor 22 is energized to drive the lead screw 21 to rotate in the forward direction. The rotation of the lead screw 21 drives the nut sleeve 41, which is threaded with it, to move along the lead screw 21 toward the port of the slide groove 13. The movement of the nut sleeve 41 drives the display screen 3 to slide outward along the slide groove 13 synchronously through the hinge seat 4. During this process, the ball plunger 52 in the guide limiting assembly 5 slides relative to each other in the guide groove 32 on the side wall of the display screen 3. The ball rolls along the first groove 321 while the main body slides along the second groove 322, ensuring that the display screen 3 extends smoothly along the predetermined tilt trajectory. Since the drive stroke of the lead screw 21 of the sliding drive assembly 2 is set to be longer than the overall length of the guide groove 32 on the side wall of the display screen 3, when the guide limiting assembly 5 slides to the end limit position of the guide groove 32, the ball plunger 52 can no longer slide relative to the guide groove 32. At this time, the translational extension stage of the display screen 3 ends. However, the servo motor 22 continues to drive the lead screw 21 to rotate, and the nut sleeve 41 continues to move towards the port of the slide groove 13 under the drive of the lead screw 21. At this time, the hinge seat 4 continues to push the tail end of the display screen 3 forward, while the front end of the display screen 3 is pulled in the opposite direction by the guide limit component 5 through the tail end of the guide groove 32, making it impossible for the display screen 3 to continue to move horizontally. Therefore, under the combined action of the continuous pushing of the hinge seat 4 and the backward pulling of the guide limit component 5, the display screen 3 is forced to flip around the hinge axis 43. At the same time, the clearance opening 111 provided by the end face of the slide groove 13 provides clearance space for the flipping of the display screen 3, so that the display screen 3 can smoothly achieve the transformation from the tilted storage posture to the vertical standing posture at the clearance opening 111. During the flipping process, the damping force between the hinge axis 43 and the lug 31 effectively suppresses the shaking of the display screen 3, ensuring the smoothness of the flipping action. Moreover, when the display screen 3 is fully upright, the damping force can also maintain the stability of the display screen 3 in the upright posture, preventing the display screen 3 from falling unexpectedly due to vehicle vibration. When the display screen 3 needs to be stored, the servo motor 22 rotates in the opposite direction to drive the lead screw 21 to reverse. The nut sleeve 41 drives the hinge seat 4 to move away from the port of the slide groove 13. The hinge seat 4 first pulls the tail end of the display screen 3 to make the display screen 3 flip back from the upright position to the tilted position. Then it continues to pull the display screen 3 to slide along the guide groove 32 and retract into the slide groove 13, so as to achieve complete hiding and storage.

[0035] Reference Figure 1-2Regarding the specific assembly structure of the mounting shell 1, a latch 112 is provided at the bottom of the shell 11. The latch 112 is used to fix the entire mounting shell 1 to the top shell of the car steering rod. The mounting shell 1 can directly replace the original shell at the top of the car steering rod and is fixed with other shells through the latch 112, thereby realizing the non-destructive installation of the display device at the steering rod position in front of the steering wheel. This ensures that the upright display screen 3 is exactly within the driver's field of vision, making it easy for the driver to read driving information without shifting their gaze. The power connection of the display screen 3 uses a flexible wire, and the flexible wire runs through the shell 11. The flexible wire has a reserved travel range to move with the display screen 3.

[0036] In practical use, when the vehicle is parked or the driver does not need to use the display screen 3, the display screen 3 is completely retracted into the slide groove 13 of the mounting shell 1. The mounting shell 1, as the top shell of the steering column, blends seamlessly with the interior environment, without occupying extra space or affecting the aesthetics of the vehicle. When the driver needs to view driving information, the servo motor 22 is activated via the vehicle's infotainment system or physical buttons, and the display screen 3 automatically extends and stands up, providing the driver with key driving information such as vehicle speed, battery level, and navigation. When the display screen 3 is not needed, the servo motor 22 is reversed via a control signal, and the display screen 3 automatically retracts into the slide groove 13, returning to its hidden state.

[0037] The automotive display device provided in this application slides the display screen 3 within the groove 13 of the mounting housing 1, and automatically extends and retracts the display screen 3 in conjunction with the sliding drive assembly 2. During extension, the difference in length between the drive stroke and the guide groove 32 enables the display screen 3 to automatically flip and stand up. Only a single drive source is needed to complete both the translational extension and the flipping / standing-up actions, resulting in a compact structure and reliable operation. Furthermore, the cooperation between the guide limit assembly 5 and the guide groove 32 ensures the accuracy of the display screen 3's movement trajectory, and the damping structure at the hinge ensures the stability of the display screen 3's upright posture. Overall, this solves the technical problems of adding a display screen 3 to a car without an instrument panel affecting the interior aesthetics and making it susceptible to damage.

[0038] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A display device for automobiles, characterized in that: The device includes a mounting housing with an inwardly recessed groove on one side of its top. The groove is inclined, and a display screen is slidably mounted on the mounting housing within the groove. A receiving groove is provided below the groove, and a sliding drive assembly is located within the receiving groove. The groove communicates with the receiving groove. A hinged seat is hinged to the end of the display screen away from the groove port. The sliding drive assembly is connected to the hinged seat, and the display screen is driven to slide out of or retract from the groove via the sliding drive assembly. A clearance opening is provided on the end face of the groove, allowing the display screen to stand upright at the clearance opening after sliding out of the groove, thanks to the hinged connection between the display screen and the hinged seat.

2. The automotive display device according to claim 1, characterized in that: The display screen is provided with guide grooves on both sides of the screen, and the mounting shell is provided with guide limiting components on both sides of the clearance opening. The guide limiting components are inserted into the guide grooves and slide within the guide grooves.

3. The automotive display device according to claim 2, characterized in that: The guide limiting assembly includes a ball bearing embedded in the inner wall of the clearance opening and a ball plunger connected to the inner ring of the ball bearing. The ball plunger is connected to the inner ring of the ball bearing to enable the main body of the ball plunger to rotate. The guide groove is a stepped groove, which includes a first groove and a second groove communicating with the first groove. The first groove is fitted with the ball of the ball plunger, and the ball of the ball plunger passes into the first groove and abuts against the inner wall of the first groove. The second groove is fitted with the main body of the ball plunger, and the main body of the ball plunger passes into the second groove and abuts against the inner wall of the second groove.

4. The automotive display device according to claim 2, characterized in that: The driving stroke of the sliding drive assembly is longer than the length of the guide groove. When the guide limiting assembly slides to the end of the guide groove, the sliding drive assembly further drives the display screen to move forward. The display screen is pushed by the hinge seat and pulled back by the guide limiting assembly to flip and stand up.

5. A display device for automobiles according to claim 1, characterized in that: The sliding drive assembly includes a lead screw and a servo motor. The lead screw is disposed in the receiving groove and rotatably connected to the mounting shell. The servo motor is disposed in the receiving groove and fixedly connected to the mounting shell. The servo motor is connected to the lead screw and is used to drive the lead screw to rotate in both directions. The lead screw is screwed to the hinge seat.

6. A display device for automobiles according to claim 5, characterized in that: The hinge seat includes a nut sleeve and two hinge arms arranged at intervals on the nut sleeve. The tail end of the display screen is provided with a lug, which is engaged between the two hinge arms. An opening is provided between the two hinge arms and the lug. A hinge shaft passes through the three openings. The hinge shaft and the openings of the two hinge arms are interference fit. The opening of the lug is transition fit with the hinge shaft, and there is a damping force between the hinge shaft and the lug.

7. A display device for automobiles according to claim 1, characterized in that: The mounting housing includes a housing with an open bottom and closed sides, and a base bracket disposed inside the housing. The base bracket is fixed to the housing by bolts. The base bracket and the top of the housing form a mounting cavity. The sliding groove extends from one side of the mounting housing into the mounting cavity. The bottom of the mounting cavity forms the receiving groove. The sliding drive assembly is fixed to the base bracket.

8. A display device for automobiles according to claim 7, characterized in that: The bottom of the housing is provided with a latch, which allows the housing to replace the top housing of the car steering rod and to be fixed with other housings through the latch.

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