Vehicle-mounted projection screen box

Abstract

The utility model relates to the technical field of vehicle-mounted equipment, and discloses a vehicle-mounted projection screen box which comprises a drawer shell, a printed circuit board assembly, a drawer cover and radiating fins. A through cavity with an opening in one side is formed in the drawer shell, and the printed circuit board assembly is fixed in the through cavity of the drawer shell. One end of the cooling fin is located in the drawer shell and is in direct contact with the printed circuit board assembly; the other end of the cooling fin is located outside the drawer shell, and the part, located outside the drawer shell, of the cooling fin is bent at the drawer cover and then attached to the surface of the drawer cover. According to the utility model, one end of the radiating fin is arranged in the drawer shell and is in direct contact with the printed circuit board assembly; the other end of the cooling fin is located on the outer side of the drawer shell and used for being in contact with external air of the vehicle-mounted projection screen box, then heat on the printed circuit board assembly is absorbed through the cooling fin, and then heat dissipation is conducted through the end, located on the outer side of the drawer shell, of the cooling fin. The heat dissipation level of the printed circuit board assembly can be improved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle-mounted equipment technology, specifically to a vehicle-mounted screen projection box. Background Technology

[0002] In today's rapidly evolving automotive landscape, in-vehicle infotainment systems have become a focal point for drivers and passengers. Traditional in-vehicle information systems are functionally limited, with built-in displays offering only basic navigation, multimedia playback, and vehicle status updates. Their user interfaces are also relatively simplistic, failing to meet diverse user interaction needs. Meanwhile, the advent of the mobile internet era has led to a wealth of applications on smartphones and other mobile devices, covering areas such as map navigation, music and video playback, and office software. However, the in-vehicle environment presents unique challenges; directly operating a mobile phone poses safety hazards, and the small screen size hinders information access for drivers while driving. Therefore, achieving seamless connectivity between mobile devices and in-vehicle displays—enabling convenient projection of mobile content onto the large in-vehicle screen for easy operation—has become crucial to solving this problem.

[0003] In-vehicle screen mirroring technology has emerged to meet this need, mirroring the screen of a mobile device to an in-vehicle display via wired or wireless means, greatly expanding the functional boundaries of in-vehicle information systems. However, as the core relay device for data transmission, the screen mirroring box generates a significant amount of heat during operation. This heat accumulation problem is particularly pronounced when handling complex tasks such as high-definition video and multi-tasking simultaneous screen mirroring. Poor heat dissipation performance can lead to decreased chip performance, data transmission delays, and even system crashes, severely impacting the stability and smoothness of screen mirroring. Therefore, improving the heat dissipation performance of the screen mirroring box is a crucial step in ensuring its stable operation and optimizing the user experience. Utility Model Content

[0004] In view of this, the present invention provides a vehicle-mounted projection box to solve the heat dissipation problem of the projection box.

[0005] This utility model provides a vehicle-mounted screen projection box, including:

[0006] The drawer shell has an internal cavity with an opening on one side;

[0007] A printed circuit board assembly is fixed inside the cavity of the drawer shell, with the interface of the printed circuit board assembly facing outwards;

[0008] A drawer cover is connected to the open end of the drawer shell and seals the opening of the drawer shell cavity. The drawer cover has a through hole, and the interface is adapted to be inserted into the through hole.

[0009] The heat sink is bent; one end of the heat sink is inside the drawer shell and this end is in direct contact with the printed circuit board assembly; the other end of the heat sink is outside the drawer shell, and the part of the heat sink outside the drawer shell is bent at the drawer lid and fits against the surface of the drawer lid.

[0010] Beneficial Effects: The drawer shell is used to fix it to the vehicle body. The drawer shell has an internal cavity with an opening on one side, which faces the driver's seat. The printed circuit board (PCB) assembly can be fixed to the cavity of the drawer shell with screws. To facilitate connection between the PCB assembly and external devices, the PCB assembly interface faces outwards. The drawer cover connects to the open end of the drawer shell to seal the opening of the cavity. Simultaneously, the drawer cover has through holes, into which the interface of the PCB assembly is suitable for insertion. To enhance the heat dissipation capacity of the PCB assembly, one end of the heat sink is located inside the drawer shell and in direct contact with the PCB assembly; the other end of the heat sink is located outside the drawer shell, in contact with the external air of the vehicle-mounted projection box. This allows the heat sink to absorb heat from the PCB assembly and then dissipate it through the end of the heat sink on the outside of the drawer shell. Compared to the natural heat dissipation of the PCB assembly, this significantly improves its heat dissipation level.

[0011] In one alternative embodiment, the drawer cover is provided with a placement groove, and the portion of the heat sink located outside the drawer shell is bent at the drawer cover and placed in the placement groove.

[0012] Beneficial effect: By providing a placement slot on the drawer lid, after the portion of the heat sink located on the outside of the drawer shell is bent, the bent heat sink can enter the placement slot, thereby realizing the placement of the heat sink.

[0013] In one alternative embodiment, the depth of the placement slot is greater than or equal to the thickness of the heat sink within the placement slot.

[0014] Beneficial effect: By setting the depth of the placement slot to be greater than or equal to the thickness of the heat sink inside the placement slot, the heat sink can be prevented from protruding from the surface of the drawer lid when the bent heat sink is placed inside the placement slot.

[0015] In one optional embodiment, both the bottom wall of the placement slot and the heat sink located in the placement slot are provided with fixing holes, and the fixing holes are suitable for fixing fasteners.

[0016] In one alternative embodiment, the portion of the heat sink inside the drawer housing is attached to the surface of the printed circuit board assembly.

[0017] Beneficial effects: In order to enable the heat on the printed circuit board assembly to be transferred to the heat sink more quickly, the heat sink inside the drawer shell of this utility model is attached to the surface of the printed circuit board assembly to increase the contact area between the heat sink and the printed circuit board assembly.

[0018] In one alternative embodiment, the portion of the heat sink inside the drawer housing is provided with a bend to accommodate the printed circuit board assembly.

[0019] Beneficial effects: The printed circuit board assembly has several electronic components. In order to fit the surface of the printed circuit board assembly, the part of the heat sink inside the drawer shell has a bend so that the heat sink can better fit the surface of the printed circuit board assembly.

[0020] In one alternative embodiment, the heat sink is fixed to the printed circuit board assembly with thermally conductive adhesive.

[0021] In one alternative embodiment, the heat sink is made of aluminum.

[0022] In one alternative embodiment, the drawer housing has an upwardly raised end with an opening, and the interface on the printed circuit board assembly is located within the raised portion of the drawer housing.

[0023] In one optional embodiment, the drawer shell is provided with a snap-fit ​​groove, and the drawer cover is provided with a snap-fit ​​part, wherein the drawer shell and the drawer cover are snapped and fixed together by the snap-fit ​​part and the snap-fit ​​groove.

[0024] Beneficial effects: When installing the drawer shell and drawer lid, press the drawer lid firmly to engage the snap-fit ​​mechanism on the drawer lid with the snap-fit ​​groove on the drawer shell, thus securing the drawer lid to the drawer shell. The drawer shell and drawer lid are made of PC+ABS material, resulting in a lightweight and low-cost design.

[0025] The vehicle-mounted screen projection box provided by this utility model has the following advantages:

[0026] 1. This utility model provides a vehicle-mounted projection box, including a drawer shell, a printed circuit board assembly, a drawer lid, and a heat sink. The drawer shell has an internal cavity with an opening on one side. The printed circuit board assembly is fixed inside the cavity, with its interface facing outwards. The drawer lid connects to the open end of the drawer shell and seals the opening of the cavity. The drawer lid has a through hole, and the interface is suitable for insertion into the through hole. The heat sink is bent. One end of the heat sink is inside the drawer shell and in direct contact with the printed circuit board assembly. The other end of the heat sink is outside the drawer shell, and the portion of the heat sink outside the drawer shell is bent at the drawer lid and fits against the surface of the drawer lid.

[0027] This vehicle-mounted projection box features a drawer shell for securing it to the vehicle body. The drawer shell has an internal cavity with an opening on one side, facing the driver's seat. A printed circuit board (PCB) assembly is screwed into this cavity, with its interfaces facing outwards for easy connection to external devices. A drawer lid connects to the drawer shell's opening to seal it. The drawer lid also has through holes into which the PCB assembly's interfaces are inserted. To enhance heat dissipation, one end of a heat sink is positioned inside the drawer shell, directly contacting the PCB assembly; the other end is positioned outside the drawer shell, in contact with the external air. This allows the heat sink to absorb heat from the PCB assembly and dissipate it through the outer end of the heat sink, significantly improving heat dissipation compared to natural cooling.

[0028] 2. This utility model provides a vehicle-mounted projection box, wherein the depth of the placement slot is greater than or equal to the thickness of the heat sink within the placement slot.

[0029] This vehicle-mounted projection box, by setting the depth of the placement slot to be greater than or equal to the thickness of the heat sink inside the placement slot, can prevent the heat sink from protruding from the surface of the drawer lid when the bent heat sink is placed inside the placement slot.

[0030] 3. This utility model provides a vehicle-mounted projection box, in which the heat sink inside the drawer shell is attached to the surface of the printed circuit board assembly.

[0031] In order to enable the heat from the printed circuit board assembly to be transferred to the heat sink more quickly, the heat sink inside the drawer shell of this vehicle projection box is designed to be attached to the surface of the printed circuit board assembly, thereby increasing the contact area between the heat sink and the printed circuit board assembly.

[0032] 4. This utility model provides a vehicle-mounted projection box, in which the heat sink inside the drawer shell has a bent portion to adapt to the printed circuit board assembly.

[0033] The in-vehicle projection box with this structure has several electronic components on the printed circuit board assembly. In order to fit the surface of the printed circuit board assembly, the part of the heat sink inside the drawer shell has a bend so that the heat sink can better fit the surface of the printed circuit board assembly. Attached Figure Description

[0034] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] Figure 1 This is a structural diagram of a vehicle-mounted projection box according to an embodiment of the present utility model;

[0036] Figure 2 This is a structural diagram of a vehicle-mounted projection box after removing the drawer shell according to an embodiment of the present utility model;

[0037] Figure 3 This is an exploded view of a vehicle-mounted projection box according to an embodiment of the present utility model;

[0038] Figure 4 This is a structural diagram of a heat sink in a vehicle-mounted projection box according to an embodiment of the present utility model.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1. Drawer shell; 101. Snap-fit ​​groove; 2. Printed circuit board assembly; 3. Drawer lid; 301. Snap-fit ​​part; 4. Heat sink; 401. Bending part. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0042] In today's rapidly evolving automotive landscape, in-vehicle infotainment systems have become a focal point for drivers and passengers. Traditional in-vehicle information systems are functionally limited, with built-in displays offering only basic navigation, multimedia playback, and vehicle status updates. Their user interfaces are also relatively simplistic, failing to meet diverse user interaction needs. Meanwhile, the advent of the mobile internet era has led to a wealth of applications on smartphones and other mobile devices, covering areas such as map navigation, music and video playback, and office software. However, the in-vehicle environment presents unique challenges; directly operating a mobile phone poses safety hazards, and the small screen size hinders information access for drivers while driving. Therefore, achieving seamless connectivity between mobile devices and in-vehicle displays—enabling convenient projection of mobile content onto the large in-vehicle screen for easy operation—has become crucial to solving this problem.

[0043] In-vehicle screen mirroring technology has emerged to meet this need, mirroring the screen of a mobile device to an in-vehicle display via wired or wireless means, greatly expanding the functional boundaries of in-vehicle information systems. However, as the core relay device for data transmission, the screen mirroring box generates a significant amount of heat during operation. This heat accumulation problem is particularly pronounced when handling complex tasks such as high-definition video and multi-tasking simultaneous screen mirroring. Poor heat dissipation performance can lead to decreased chip performance, data transmission delays, and even system crashes, severely impacting the stability and smoothness of screen mirroring. Therefore, improving the heat dissipation performance of the screen mirroring box is a crucial step in ensuring its stable operation and optimizing the user experience.

[0044] The following is combined with Figures 1 to 4 The following describes embodiments of the present invention.

[0045] According to an embodiment of this utility model, a vehicle-mounted projection box is provided, including a drawer shell 1, a printed circuit board assembly 2, a drawer cover 3, and a heat sink 4. The drawer shell 1 has an internal cavity with an opening on one side. The printed circuit board assembly 2 is fixed inside the cavity of the drawer shell 1, with its interface facing outwards. The drawer cover 3 is connected to the opening end of the drawer shell 1 and seals the opening of the cavity. The drawer cover 3 has a through hole, and the interface is suitable for insertion into the through hole. The heat sink 4 is bent. One end of the heat sink 4 is inside the drawer shell 1 and directly contacts the printed circuit board assembly 2. The other end of the heat sink 4 is outside the drawer shell 1, and the portion of the heat sink 4 outside the drawer shell 1 is bent at the drawer cover 3 and adheres to the surface of the drawer cover 3.

[0046] In this embodiment, the drawer shell 1 is used to fix it to the vehicle body. The drawer shell 1 has an internal cavity with an opening on one side, which faces the driver's seat. The printed circuit board assembly 2 can be fixed inside the cavity of the drawer shell 1 with screws. To facilitate connection between the printed circuit board assembly 2 and external devices, the interface of the printed circuit board assembly 2 faces outwards. The drawer cover 3 is connected to the opening end of the drawer shell 1 to seal the opening of the cavity. Simultaneously, the drawer cover 3 has a through hole, into which the interface of the printed circuit board assembly 2 is adapted to be inserted. To enhance the heat dissipation capacity of the printed circuit board assembly 2, in this embodiment, one end of the heat sink 4 is located inside the drawer shell 1 and in direct contact with the printed circuit board assembly 2; the other end of the heat sink 4 is located outside the drawer shell 1, and this end is used to contact the external air of the vehicle-mounted projection box. This allows the heat sink 4 to absorb heat from the printed circuit board assembly 2, and then dissipate heat through the end of the heat sink 4 located outside the drawer shell 1. Compared to the natural heat dissipation of the printed circuit board assembly 2, this improves its heat dissipation level.

[0047] In this embodiment, the heat sink 4 is bent. Specifically, as shown... Figure 2As shown, the portion of the heat sink 4 located on the outside of the drawer shell 1 is bent at the drawer cover 3 and then adheres to the surface of the drawer cover 3.

[0048] In one embodiment, the drawer cover 3 is provided with a placement groove, and the portion of the heat sink 4 located outside the drawer shell 1 is bent at the drawer cover 3 and placed in the placement groove. By providing a placement groove on the drawer cover 3, after the portion of the heat sink 4 located outside the drawer shell 1 is bent, the bent heat sink 4 can enter the placement groove, thereby realizing the placement of the heat sink 4.

[0049] In one embodiment, the depth of the placement slot is greater than or equal to the thickness of the heat sink 4 within the placement slot. By setting the depth of the placement slot to be greater than or equal to the thickness of the heat sink 4 within the placement slot, the heat sink 4 can be prevented from protruding from the surface of the drawer cover 3 when the bent heat sink 4 is placed inside the placement slot.

[0050] In one embodiment, both the bottom wall of the placement slot and the heat sink 4 located within the placement slot are provided with fixing holes, which are suitable for fixing fasteners. For example... Figure 3 As shown, fixing holes, specifically screw holes, are provided on the bottom wall of the placement slot and on the heat sink 4 located within the placement slot. During fixing, the heat sink 4 is secured to the placement slot by inserting a fixing member into the fixing holes on the bottom wall of the placement slot and on the heat sink 4. It can be understood that when the heat sink 4 is placed inside the placement slot, the fixing holes on the heat sink 4 are aligned with the fixing holes on the placement slot, and screws can be used as the fixing members.

[0051] In one embodiment, the portion of the heat sink 4 inside the drawer housing 1 is all attached to the surface of the printed circuit board assembly 2. For example... Figure 2 As shown, in order to enable the heat on the printed circuit board assembly 2 to be transferred to the heat sink 4 more quickly, in this embodiment, the portion of the heat sink 4 inside the drawer shell 1 is attached to the surface of the printed circuit board assembly 2 to increase the contact area between the heat sink 4 and the printed circuit board assembly 2.

[0052] In one embodiment, the portion of the heat sink 4 inside the drawer housing 1 has a bend 401 to accommodate the printed circuit board assembly 2. For example... Figure 3 As shown, the printed circuit board assembly 2 is provided with several electronic components. In order to adapt to the surface of the printed circuit board assembly 2, such as... Figures 2 to 4 As shown, the portion of the heat sink 4 inside the drawer housing 1 has a bent portion 401, so that the heat sink 4 can better fit the surface of the printed circuit board assembly 2.

[0053] In one embodiment, the heat sink 4 is fixed to the printed circuit board assembly 2 with thermally conductive adhesive. The thermally conductive adhesive used is one with a high thermal conductivity.

[0054] In one embodiment, the heat sink 4 is made of aluminum.

[0055] In one embodiment, such as Figure 1 As shown, the drawer shell 1 has an opening at one end that protrudes upwards, and the interface on the printed circuit board assembly 2 is located within the protruding part of the drawer shell 1.

[0056] In one embodiment, the drawer shell 1 has a snap-fit ​​groove 101, and the drawer cover 3 has a snap-fit ​​part 301, which is a protrusion on the drawer cover 3. When installing the drawer shell 1 and the drawer cover 3, the drawer cover 3 is pressed firmly to engage the snap-fit ​​part 301 on the drawer cover 3 with the snap-fit ​​groove 101 on the drawer shell 1, thereby fixing the drawer cover 3 to the drawer shell 1. The drawer shell 1 and the drawer cover 3 are made of PC+ABS material, resulting in low weight and low cost.

[0057] In one embodiment, such as Figures 2 to 4 As shown, the heat sink 4 has two fixing holes, which are located on both sides of the bent portion 401 on the heat sink 4. Correspondingly, the printed circuit board assembly 2 also has two fixing holes. When fixing the heat sink 4, the two fixing holes on the heat sink 4 are aligned with the two fixing holes on the printed circuit board assembly 2, and then screws or other fasteners are inserted to fix the heat sink 4 to the printed circuit board assembly 2.

[0058] In one embodiment, such as Figure 3 As shown, the drawer cover 3 has two square through holes, and the printed circuit board assembly 2 also has two corresponding interfaces. It can be understood that the positions of the two square through holes on the drawer cover 3 correspond to the positions of the two interfaces on the printed circuit board assembly 2. When the drawer cover 3 is fixed to the drawer shell 1, it ensures that the two interfaces on the printed circuit board assembly 2 can be smoothly inserted into the two square through holes on the drawer cover 3. The placement groove on the drawer cover 3 is located between the two square through holes.

[0059] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A vehicle-mounted screen projection box, characterized in that, include: Drawer shell (1) has an internal cavity with an opening on one side; The printed circuit board assembly (2) is fixed inside the cavity of the drawer shell (1), and the interface of the printed circuit board assembly (2) is placed outward. The drawer cover (3) is connected to the open end of the drawer shell (1) and blocks the opening of the cavity of the drawer shell (1). The drawer cover (3) is provided with a through hole, and the interface is adapted to be inserted into the through hole. The heat sink (4) is bent; one end of the heat sink (4) is inside the drawer shell (1) and this end is in direct contact with the printed circuit board assembly (2); the other end of the heat sink (4) is outside the drawer shell (1), and the part of the heat sink (4) outside the drawer shell (1) is bent at the drawer cover (3) and then attached to the surface of the drawer cover (3).

2. The vehicle-mounted projection box according to claim 1, characterized in that, The drawer cover (3) is provided with a placement groove, and the part of the heat sink (4) located outside the drawer shell (1) is bent at the drawer cover (3) and placed in the placement groove.

3. The vehicle-mounted projection box according to claim 2, characterized in that, The depth of the placement slot is greater than or equal to the thickness of the heat sink (4) located within the placement slot.

4. The vehicle-mounted projection box according to claim 3, characterized in that, Fixing holes are provided on the bottom wall of the placement slot and on the heat sink (4) located in the placement slot, and the fixing holes are suitable for fixing fasteners.

5. The vehicle-mounted projection box according to claim 1, characterized in that, The portion of the heat sink (4) inside the drawer shell (1) is attached to the surface of the printed circuit board assembly (2).

6. The vehicle-mounted projection box according to claim 5, characterized in that, The portion of the heat sink (4) inside the drawer housing (1) is provided with a bent portion (401) to accommodate the printed circuit board assembly (2).

7. The vehicle-mounted projection box according to claim 1, characterized in that, The heat sink (4) is fixed to the printed circuit board assembly (2) with thermally conductive adhesive.

8. The vehicle-mounted projection box according to claim 7, characterized in that, The heat sink (4) is made of aluminum.

9. The vehicle-mounted projection box according to claim 1, characterized in that, The drawer shell (1) has an opening at one end that protrudes upwards, and the interface portion of the printed circuit board assembly (2) is located within the protruding portion of the drawer shell (1).

10. The vehicle-mounted projection box according to claim 1, characterized in that, The drawer shell (1) is provided with a snap-fit ​​groove (101), and the drawer cover (3) is provided with a snap-fit ​​part (301). The drawer shell (1) and the drawer cover (3) are snapped and fixed by the snap-fit ​​part (301) and the snap-fit ​​groove (101).

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