Die casting with limiting structure, vehicle-mounted backlight module and vehicle-mounted display device

Abstract

The application relates to the technical field of vehicle-mounted backlight modules, and particularly provides a die casting with a limiting structure, a vehicle-mounted backlight module and a vehicle-mounted display device. The die casting comprises a die casting bottom plate arranged in a horizontal direction; a die casting side frame plate arranged in a height direction, the die casting side frame plate being integrally formed at a ridge edge of the die casting bottom plate, the die casting side frame plate having a side frame outer circumferential surface, a side frame top surface facing away from the die casting bottom plate and a side frame bottom surface facing away from the side frame top surface; and a plurality of first limiting grooves arranged on the side frame bottom surface and used for cooperating with first buckles on a machine shell to limit the die casting and the machine shell in the horizontal direction. When the die casting is assembled into the machine shell together with the vehicle-mounted backlight module, the first buckles gradually approach and enter the first limiting grooves, and are limited by the bottoms of the first limiting grooves, thereby limiting the machine shell and the die casting in X-axis and Y-axis directions, so that the vehicle-mounted backlight module and the machine shell can also be limited in the X-axis and Y-axis directions.

Description

Technical Field

[0001] This application relates to the field of automotive backlight module technology, and more particularly to die-cast parts with limiting structures, automotive backlight modules, and automotive display devices. Background Technology

[0002] As the screen sizes of automotive display devices continue to increase, the structural design of automotive backlight modules faces higher stability requirements. Existing automotive backlight modules generally use die-cast parts as key structural components for their functional parts. Simultaneously, the automotive backlight module also includes a housing that mates with the die-cast part; the assembly of the automotive backlight module is completed through the connection between the housing and the die-cast part.

[0003] Meanwhile, due to the special circumstances of the vehicle environment, the vehicle display device will inevitably vibrate as the car moves, which requires effective fixation of the vehicle backlight module. However, existing vehicle display devices usually have a Z-axis (height direction) locking structure between the housing and the die-cast part; however, no locking structure is set along the X and Y axes (horizontal direction). This causes the assembled vehicle display module to undergo relative displacement with the housing in the X and Y axes when the car moves, thereby reducing the service life of the vehicle display device.

[0004] Therefore, existing technologies have defects and shortcomings, and need further improvement and development. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this application is to provide a die-cast part with a limiting structure, an automotive backlight module and an automotive display device, which aims to solve the problem that the automotive backlight module and the housing in the prior art do not have a limiting structure in the X and Y axis directions.

[0006] The technical solution adopted by this application to solve the technical problem is as follows: a die-casting part with a limiting structure, the die-casting part having mutually perpendicular horizontal and height directions, the die-casting part being used in an automotive backlight module, wherein the die-casting part comprises: A die-cast base plate, wherein the die-cast base plate is disposed along the horizontal direction; A die-cast side frame plate, wherein the die-cast side frame plate is disposed along the height direction, and the die-cast side frame plate is integrally formed at the edge of the die-cast base plate. The die-cast side frame plate has an outer peripheral surface of the side frame, a top surface of the side frame facing away from the die-cast base plate, and a bottom surface of the side frame facing away from the top surface of the side frame. A plurality of first limiting grooves are provided on the bottom surface of the side frame to cooperate with the first buckle on the housing to limit the die-casting part and the housing in the horizontal direction.

[0007] Optionally, the first limiting groove is configured as an introductory section, a correction section, and a buffer self-locking section from top to bottom along the height direction; the introductory section is used to initially guide the first buckle on the housing; the correction section is used to buffer and guide the first buckle; the buffer self-locking section is used to provide a flexible interference fit to the first buckle; and the cross-section of the first limiting groove in the horizontal direction decreases from top to bottom along the height direction.

[0008] Optionally, the inlet segment is configured as an inlet arc surface with an arc radius of 0.6-1.2 mm; or, the inlet segment is configured as an inlet slope with an inclination angle of 12°-15°. The correction section is provided with several flexible guide ribs extending along the height direction; the buffer self-locking section is provided with a flexible continuous groove wall, and the inlet section, the flexible guide ribs and the flexible continuous groove wall are smoothly connected.

[0009] Optionally, the die-cast part further includes: A plurality of second slots are provided on the outer peripheral surface of the side frame, and the plurality of second slots are used for connecting the buckles of the housing; A plurality of guide recesses are provided, each corresponding to a plurality of second slots. The plurality of guide recesses are located on the outer peripheral surface and the bottom surface of the side frame, and in the area between the bottom surface of the side frame and the second slot. The plurality of guide recesses are used to provide deformation space for the housing buckle and to position and guide the housing buckle into the second slot.

[0010] Optionally, the guide recess includes a first guide portion and a second guide portion, the second guide portion being located between the first guide portion and the slot; the first guide portion and the second guide portion are smoothly connected.

[0011] Optionally, both the first guide portion and the second guide portion are configured as arc-shaped guide portions, and the radius of curvature of the first guide portion is smaller than the radius of curvature of the second guide portion; or... Both the first guide portion and the second guide portion are configured as inclined guide portions, and the inclination angle of the second guide portion is smaller than the inclination angle of the second guide portion; or... The first guide portion is configured as an arc-shaped guide portion, and both second guide portions are configured as beveled guide portions; or... The first guide portion is configured as a sloped guide portion, and the second guide portions are both configured as arc guide portions.

[0012] Optionally, the extension width of the first guide portion is set to decrease from top to bottom along the height direction; The depth of the first guide portion decreases from top to bottom along the height direction.

[0013] Optionally, the first guide portion and the first guide portion are provided with deformation grooves at their two edges perpendicular to the height direction.

[0014] Another technical solution adopted by this application to solve the technical problem is as follows: a vehicle-mounted backlight module, wherein the vehicle-mounted backlight module includes the die-cast part as described above.

[0015] Another technical solution adopted by this application to solve the technical problem is as follows: an in-vehicle display device, wherein the in-vehicle display device includes the in-vehicle backlight module as described above.

[0016] Beneficial effects: This application provides a die-cast part with a limiting structure, an automotive backlight module, and an automotive display device. The die-cast part has several first limiting grooves opened on the bottom surface of the side frame of the die-cast side frame plate. The housing has several first buckles arranged along the Z-axis direction, which correspond one-to-one with the several first limiting grooves. When the die-cast part is assembled into the housing along with the automotive backlight module, the first buckles gradually approach and enter the first limiting grooves. Under the constraint of the bottom of the first limiting grooves, the housing and the die-cast part are limited in the X-axis and Y-axis directions, thereby allowing the automotive backlight module and the housing to also be limited in the X-axis and Y-axis directions. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the die-cast part of the vehicle backlight module provided in this application; Figure 2 It is provided in this application Figure 1 Enlarged diagram of point C in the diagram; Figure 3 This is a partial perspective sectional view of the first slot of the die-cast part provided in this application; Figure 4 This is a partial perspective sectional view of the vehicle-mounted display device provided in this application; Figure 5 It is provided in this application Figure 1 Enlarged diagram of point A in the diagram; Figure 6 This is a three-dimensional sectional view of the die-cast part provided in this application; Figure 7 It is provided in this application Figure 6 Enlarged diagram of point B in the diagram; Figure 8 This is a three-dimensional structural diagram of the vehicle backlight module provided in this application; Figure 9 This is a partial cross-sectional schematic diagram of the vehicle-mounted display device provided in this application; Explanation of reference numerals in the attached figures: 1. Vehicle-mounted backlight module; 10. Die-cast part; 11. Die-cast base plate; 12. Die-cast side frame plate; 13. Second slot; 14. Guide recess; 15. First slot; 121. Outer circumferential surface of side frame; 122. Top surface of side frame; 123. Bottom surface of side frame; 141. First guide part; 142. Second guide part; 143. Deformation groove; 151. Inlet section; 152. Correction section; 153. Buffer self-locking section; 154. Flexible guide rib; 20. Housing; 21. Second buckle; 22. First buckle. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer and more explicit, the following detailed description of this application is provided with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0019] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0021] Please refer to the following: Figures 1 to 4The first embodiment of this application provides a vehicle-mounted backlight module 1, which is installed on a vehicle-mounted display device. The vehicle-mounted backlight module 1 includes a die-cast part 10 with a limiting structure. The die-cast part 10 with the limiting structure supports and protects the functional components of the vehicle-mounted backlight module 1 and connects to the housing 20 of the vehicle-mounted display device. To ensure the connection stability between the vehicle-mounted backlight module 1 and the housing 20 and to prevent relative displacement between the die-cast part 10 and the housing 20 in the X and Y axis directions (horizontal direction), the structure of the die-cast part 10 is optimized and improved. A first latch in the Z axis direction on the housing 20 is used to cooperate with the die-cast part 10 for limiting, thus preventing relative displacement between the vehicle-mounted backlight module 1 and the housing 20 in the X and Y axis directions when the vehicle moves. It should be noted that the horizontal direction is perpendicular to the height direction.

[0022] The die-cast part 10 includes a die-cast base plate 11, a die-cast side frame plate 12, and a plurality of first limiting grooves. The die-cast base plate 11 is arranged along the horizontal direction, and the die-cast side frame plate 12 is arranged along the height direction. The die-cast base plate 11 and the die-cast side frame plate 12 constitute the main structure of the die-cast part 10. The die-cast side frame plate 12 is integrally formed at the edge of the die-cast base plate 11. A receiving space for accommodating, fixing, and protecting the functional components of the vehicle backlight module 1 is provided between the die-cast side frame plate 12 and the die-cast base plate 11. The die-cast side frame plate 12 has an outer peripheral surface 121, a top surface 122, and a bottom surface 123. The bottom surface 123 is opposite to the top surface 122. The top surface 122 is the end face of the die-cast side frame plate 12 that is opposite to the die-cast base plate 11. The bottom surface 123 is the end face of the die-cast side frame plate 12 that smoothly transitions to the end face of the bottom plate.

[0023] Several first limiting grooves are provided on the bottom surface 123 of the side frame to cooperate with the first buckles on the housing 20 to limit the die-cast part 10 and the housing 20 in the horizontal direction. The die-cast part 10 has several first limiting grooves on the bottom surface 123 of the side frame of the die-cast side frame plate 12. The housing 20 has several first buckles along the Z-axis direction that correspond one-to-one with the several first limiting grooves. When the die-cast part 10 is assembled into the housing 20 along with the vehicle backlight module 1, the first buckles gradually approach and enter the first limiting grooves. Under the constraint of the bottom of the first limiting grooves, the housing 20 and the die-cast part 10 are limited in the X and Y directions, so that the vehicle backlight module 1 and the housing 20 can also be limited in the X and Y directions.

[0024] The first limiting groove is configured from top to bottom along the height direction as an introductory section 151, a correction section 152, and a buffer self-locking section 153; that is, the first limiting groove extends along the Z-axis direction. Precisely aligning and installing the first buckle during assembly ensures the contact guarantee of relative stability between the die-cast part 10 and the housing 20 in the X and Y axes. The introductory section 151 is used to initially guide the first buckle on the housing 20, allowing it to quickly enter the groove area of ​​the first limiting groove; the correction section 152... 2 is used to buffer and guide the first buckle. It is known that after the first buckle enters the inlet section 151, there may be an angular deviation. By setting the correction section 152, the first buckle can be guided and corrected in direction and buffered for protection. The buffer self-locking section 153 is used to make a flexible interference fit with the first buckle. After the first buckle enters the buffer self-locking section 153, it basically reaches the bottom of the first limiting groove. The buffer self-locking section 153 makes an interference fit with the first buckle, which increases the connection stability between the first buckle and the first limiting groove.

[0025] The guide section 151 is configured as a guide arc surface with a radius of 0.6-1.2 mm. This design reduces the rebound force experienced by the first buckle upon contact with the guide section 151, thus protecting its structure. Alternatively, the guide section 151 can be configured as a guide slope with an inclination angle of 12°-15°. This also reduces the rebound force experienced by the first buckle upon contact with the guide section 151, protecting its structure. The correction section 152 is provided with several flexible guide ribs 154, all extending along the height direction. This reduces the resistance and reaction force experienced by the first buckle in the correction section 152, protecting its structure while effectively correcting, guiding, and buffering the buckle. The buffer self-locking section 153 has a flexible continuous groove wall, effectively protecting the structure of the first buckle as it gradually tightens with interference fit.

[0026] The smooth transition between the inlet section, the flexible guide rib 154, and the flexible continuous groove wall allows for a continuous transition when the first buckle is inserted into the first limiting groove, preventing protrusions in the first limiting groove that could hinder the insertion of the first buckle, reducing assembly difficulty, and protecting the structure of the first buckle.

[0027] Please refer to further details. Figures 5 to 9In some embodiments, the die-cast part 10 further includes a plurality of second slots 13 and a plurality of guide recesses 14. The plurality of second slots are all disposed on the outer peripheral surface 121 of the side frame. The plurality of second slots are all used to connect the second buckle 21 of the housing 20. The second buckle 21 and the second slot 13 are engaged one-to-one to realize the connection between the die-cast part 10 and the housing 20, and to limit the connection between the housing 20 and the die-cast part 10 in the height direction. In addition, with the cooperation of the first buckle and the first slot 15, the housing 20 and the vehicle backlight module 1 are limited in the X-axis, Y-axis and Z-axis directions.

[0028] It should be noted that the housing is located inside the vehicle, typically the bottom shell or mid-frame of an in-vehicle display device. A plurality of guide recesses 14 and a plurality of second slots 13 are correspondingly provided, with the guide recesses 14 located on the outer peripheral surface 121 and the bottom surface 123 of the side frame, and in the area between the bottom surface 123 and the second slots 13. The guide recesses 14 provide deformation space for the second latches of the housing and guide them into the second slots 13. During assembly, the second latches on the housing first contact the guide recesses 14 to prevent excessive compression and damage, and are gradually guided into the slots 13 during assembly.

[0029] The guide recess 14 includes a first guide portion 141 and a second guide portion 142, with the second guide portion 142 located between the first guide portion 141 and the second slot 13. The first guide portion 141 and the second guide portion 142 are smoothly connected. That is, during assembly, the second buckle of the housing passes sequentially through the first guide portion 141 and the second guide portion 142, and then enters the second slot 13 under the continuous guidance of the first guide portion 141 and the second guide portion 142. The smooth transition between the first guide portion 141 and the second guide portion 142 ensures a smooth transition when the second buckle moves from the first guide portion 141 to the second guide portion 142, avoiding stress and further guaranteeing the safety of the second buckle and the ease of assembly of the vehicle backlight module 1.

[0030] In some embodiments, both the first guide portion 141 and the second guide portion 142 are configured as arc-shaped guide portions, and the radius of curvature of the first guide portion 141 is smaller than the radius of curvature of the second guide portion 142. That is, both the first guide portion 141 and the second guide portion 142 are configured as arc-shaped structures. At the same time, by controlling the radius of curvature of the first guide portion 141 to be smaller than the radius of curvature of the second guide portion 142, the concave depth of the first guide portion 141 is made deeper, which can quickly guide and capture the second buckle, ensuring improved assembly efficiency. It also reduces the friction between the second buckle and the first guide portion 141 and avoids excessive compression deformation of the second buckle at the beginning of assembly. Meanwhile, the second guide portion 142 can smoothly and accurately guide the second buckle into the second slot 13.

[0031] In other embodiments, both the first guide portion 141 and the second guide portion 142 are configured as inclined guide portions, and the inclination angle of the second guide portion 142 is smaller than the inclination angle of the first guide portion 141. This allows the first guide portion 141 to quickly guide and capture the second buckle, ensuring improved assembly efficiency. It also reduces friction between the second buckle and the first guide portion 141 and prevents excessive compression deformation of the second buckle at the start of assembly. Meanwhile, the second guide portion 142 can smoothly and accurately guide the second buckle into the second slot 13.

[0032] In other embodiments, the first guide portion 141 is configured as an arc-shaped guide portion, and the second guide portion 142 is configured as a sloped guide portion; or, the first guide portion 141 is configured as a sloped guide portion, and the second guide portion 142 is configured as an arc-shaped guide portion. This allows for rapid assembly of the die-cast part 10 with the housing via the first guide portion 141 and the second guide portion 142.

[0033] In other embodiments, the extension width of the first guide portion 141 decreases gradually along the direction from the top surface 122 of the side frame to the die-cast base plate 11. This maximizes the width of the opening of the first guide portion 141 away from the second guide portion 142, allowing the first guide portion 141 to quickly guide and capture the second latch, thus ensuring improved assembly efficiency. Simultaneously, setting the width of the first guide portion 141 to decrease gradually further guides the second latch.

[0034] In some embodiments, the depth of the first guide portion 141 decreases gradually along the direction from the top surface 122 of the side frame to the die-cast base plate 11. This provides more clearance when the second snap-fit ​​just enters the first guide portion 141, effectively preventing the second snap-fit ​​from being rapidly compressed during assembly. The gradient change in depth effectively guides the second snap-fit ​​while providing it with room to adapt, thus preventing damage.

[0035] In some embodiments, the direction from the top surface 122 of the side frame to the die-cast base plate 11 is the height direction, and deformation grooves 143 are formed at the two edges of the first guide portion 141 and the second guide portion 142 perpendicular to the height direction. By providing deformation grooves 143, when the second buckle abuts against the first guide portion 141, the die-cast side frame plate 12 at the first guide portion 141 is concave and deformed, thereby reducing the deformation of the second buckle.

[0036] The second embodiment of this application provides a vehicle-mounted backlight module 1, wherein the vehicle-mounted backlight module 1 includes the die-cast part 10 as described in the first embodiment of this application. When the vehicle-mounted backlight module 1 is assembled into a car, the engagement between the first buckle and the first slot limits the vehicle-mounted backlight module and the housing in the X and Y axis directions; simultaneously, the engagement between the second buckle and the second slot limits the vehicle-mounted backlight module and the housing in the Z axis direction; ultimately, the vehicle-mounted backlight module and the housing are limited in three axes (X, Y, and Z axes), ensuring the fixed stability of the vehicle-mounted backlight module.

[0037] The third embodiment of this application provides an in-vehicle display device, wherein the in-vehicle display device includes an in-vehicle backlight module 1 as described in the second embodiment of this application. This avoids damage to the connection structure between the in-vehicle backlight module 1 and the housing 20 during assembly of the in-vehicle display device, and achieves three-axis positioning (X-axis, Y-axis, and Z-axis) between the in-vehicle backlight module and the housing, ultimately ensuring the stability and lifespan of the in-vehicle display device.

[0038] In summary, this application provides a die-cast part with a limiting structure, an automotive backlight module, and an automotive display device. The die-cast part includes a die-cast base plate disposed along the horizontal direction; a die-cast side frame plate disposed along the height direction, the die-cast side frame plate being integrally formed at the edge of the die-cast base plate, the die-cast side frame plate having an outer peripheral surface and a top surface of the side frame facing away from the die-cast base plate; and a plurality of first limiting grooves disposed on the bottom surface of the side frame, used to cooperate with a first buckle on the housing to limit the die-cast part and the housing in the horizontal direction. The die-cast part has several first limiting grooves opened on the bottom surface of the side frame of the die-cast side frame plate. The housing has several first buckles arranged along the Z-axis direction, which correspond one-to-one with the several first limiting grooves. When the die-cast part is assembled into the housing along with the vehicle backlight module, the first buckles gradually approach and enter the first limiting grooves. Under the constraint of the bottom of the first limiting groove, the housing and the die-cast part are limited in the X-axis and Y-axis directions, so that the vehicle backlight module and the housing can also be limited in the X-axis and Y-axis directions.

[0039] It should be understood that the application of this application is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A die-cast part with a limiting structure, the die-cast part having mutually perpendicular horizontal and height directions, the die-cast part being used in an automotive backlight module, characterized in that, The die-cast part includes: A die-cast base plate, wherein the die-cast base plate is disposed along the horizontal direction; A die-cast side frame plate, wherein the die-cast side frame plate is disposed along the height direction, and the die-cast side frame plate is integrally formed at the edge of the die-cast base plate. The die-cast side frame plate has an outer peripheral surface of the side frame, a top surface of the side frame facing away from the die-cast base plate, and a bottom surface of the side frame facing away from the top surface of the side frame. A plurality of first limiting grooves are provided on the bottom surface of the side frame to cooperate with the first buckle on the housing to limit the die-casting part and the housing in the horizontal direction.

2. The die-casting part according to claim 1, characterized in that, The first limiting groove is configured as an introductory section, a correction section, and a buffer self-locking section from top to bottom along the height direction; the introductory section is used to initially guide the first buckle on the housing; the correction section is used to buffer and guide the first buckle; the buffer self-locking section is used to provide a flexible interference fit to the first buckle; and the cross-section of the first limiting groove in the horizontal direction decreases from top to bottom along the height direction.

3. The die-casting part according to claim 2, characterized in that, The inlet section is configured as an inlet arc surface with a radius of 0.6-1.2 mm; or, the inlet section is configured as an inlet slope with an inclination angle of 12°-15°. The correction section is provided with several flexible guide ribs extending along the height direction; the buffer self-locking section is provided with a flexible continuous groove wall, and the inlet section, the flexible guide ribs and the flexible continuous groove wall are smoothly connected.

4. The die-casting part according to any one of claims 1-3, characterized in that, The die-cast part also includes: A plurality of second slots are provided on the outer peripheral surface of the side frame, and the plurality of second slots are used for connecting the buckles of the housing; A plurality of guide recesses are provided, each corresponding to a plurality of second slots. The plurality of guide recesses are located on the outer peripheral surface and the bottom surface of the side frame, and in the area between the bottom surface of the side frame and the second slot. The plurality of guide recesses are used to provide deformation space for the housing buckle and to position and guide the housing buckle into the second slot.

5. The die-casting part according to claim 4, characterized in that, The guide recess includes a first guide portion and a second guide portion, with the second guide portion located between the first guide portion and the slot; the first guide portion and the second guide portion are smoothly connected.

6. The die-casting part according to claim 5, characterized in that, Both the first guide portion and the second guide portion are configured as arc-shaped guide portions, and the radius of curvature of the first guide portion is smaller than the radius of curvature of the second guide portion; or... Both the first guide portion and the second guide portion are configured as inclined guide portions, and the inclination angle of the second guide portion is smaller than the inclination angle of the second guide portion; or... The first guide portion is configured as an arc-shaped guide portion, and both second guide portions are configured as beveled guide portions; or... The first guide portion is configured as a sloped guide portion, and the second guide portions are both configured as arc guide portions.

7. The die-casting part according to claim 5, characterized in that, The extension width of the first guide portion decreases from top to bottom along the height direction; The depth of the first guide portion decreases from top to bottom along the height direction.

8. The die-casting part according to claim 5, characterized in that, The first guide portion and the first guide portion have deformation grooves at their two edges perpendicular to the height direction.

9. A vehicle-mounted backlight module, characterized in that, The vehicle-mounted backlight module includes a die-cast part as described in any one of claims 1-8.

10. A vehicle-mounted display device, characterized in that, The vehicle-mounted display device includes the vehicle-mounted backlight module as described in claim 9.

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