Navigation host circuit board shielding case with positioning structure

Abstract

The utility model provides a navigation host circuit board shielding case with a positioning structure, comprising a shielding case cover body, the shielding case cover body is provided with more than two first installation parts and an opening matched with an electronic component, the corner of the shielding case cover body sinks from the upper end face to the lower end face of the shielding case cover body to form the first installation parts, and the first installation parts are matched with the electronic component. A folding part is arranged between the first installation parts at the two corners, the folding part and the shielding case cover body are vertically connected into a whole, a gap is formed between the folding part and the first installation parts, and the shielding case cover body forms a containing cavity between the first installation parts and the folding part located on the outer side edge of the shielding case cover body. The folding part is provided with a limiting part and a positioning part which is vertical to the shielding case cover body; the utility model can be accurately matched with the electronic component to be positioned and installed on the circuit board, has a compact structure and small occupied space, shields electromagnetic interference generated by the electronic component, and ensures the heat dissipation effect of the electronic component.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, specifically to a navigation host circuit board shielding cover with a positioning structure. Background Technology

[0002] A car navigation system is a driving assistance device that helps users accurately locate their current position and calculate the journey based on a predetermined destination. It guides users to their destination through map display and voice prompts. Car navigation systems mainly consist of components such as chips, antennas, processors, memory, screens, and circuit boards. When the electronic devices are operating, the electronic components in the vehicle system generate electromagnetic interference, affecting the normal operation of the electronic devices. Furthermore, electromagnetic waves are radiated outwards, potentially harming the human body. Therefore, how to shield the electromagnetic waves generated by electronic components has become an urgent problem that the industry needs to solve.

[0003] For example, Chinese patent document No. 202220896813.3, published on November 15, 2022, discloses a shielding cover for vehicle control system components, including a substrate and a shielding cover body mounted on the substrate. The upper surface of the substrate is provided with a plurality of positioning blocks, and the inner sidewalls of the shielding cover body are provided with positioning grooves that cooperate with and lock into the positioning blocks. A buffer structure is also provided between the substrate and the shielding cover body. The buffer structure includes a U-shaped buffer airbag provided on the edge of the upper surface of the substrate and a plurality of evenly distributed buffer protrusions provided at the joint between the shielding cover body and the substrate.

[0004] Because the circuit board contains electronic components of different sizes that protrude from the board, it is necessary to consider both the electromagnetic interference generated by the electronic components and the heat dissipation effect of the electronic components, as well as the space occupied by the shielding cover. The aforementioned literature describes a square three-dimensional structure formed by covering the entire shielding cover body on the substrate. This takes up a lot of space and has a relatively complex structure. Moreover, heat dissipation is only achieved through the heat dissipation vents on the four sides of the shielding cover body. For the multiple electronic components on the circuit board, since the entire circuit board structure is set in a square three-dimensional space, some components that do not need to be shielded will also generate a lot of heat in the three-dimensional space, resulting in poor heat dissipation. In order to reduce the size of the shielding cover, some designs use a shielding cover to form a shielding space for installation. However, this requires fasteners for installation. For long circuit boards, it is easy to fail to reliably fasten the middle position of the long side to the circuit board by fastening only the four corner fasteners. If only the limiting part and positioning part are used for limiting, the middle position along the thickness of the board may deform due to the fastening force on both sides, resulting in low installation reliability. Utility Model Content

[0005] The purpose of this utility model is to provide a navigation host circuit board shield with a positioning structure, which can accurately match and position electronic components on the circuit board. It has a compact structure, occupies little space, and has high installation reliability.

[0006] This utility model provides the following technical solution: a navigation host circuit board shielding cover with a positioning structure, including a shielding cover body, the shielding cover body is provided with two or more mounting parts and openings that match electronic components, the corners of the shielding cover body are recessed from the upper end face to the lower end face to form mounting parts, the mounting parts at the two corners are provided with folding parts, the shielding cover body is provided with a receiving cavity between the mounting parts and the folding parts located on the outer edge of the shielding cover body, the middle part of the shielding cover body is recessed from the upper end face to the lower end face to form a basin cavity, the two sides of the shielding cover body are respectively provided with mounting parts two recessed from the upper end face to the lower end face, the mounting parts two are located at the diagonal position of the basin cavity.

[0007] The above configuration, through the formation of a receiving cavity between the shielding cover, the folding part, and the mounting part one, perfectly matches the circuit board. This allows the receiving cavity to precisely cover the circuit board of the navigation host, thereby improving the structural compactness of the shielding cover and the circuit board, reducing the space occupied inside the navigation host, and improving space utilization. A downwardly recessed basin is provided in the middle of the shielding cover, which can press the components of the circuit board. Since the mounting part two is located diagonally in the basin, for long circuit boards, components can be pre-cast onto the circuit board through the basin, and then pre-fixed by the mounting part two near the basin, thus achieving reliable installation even in the middle of the circuit board. Then, the shielding cover can be fixed to the circuit board by passing through the mounting part one with the fastener to achieve coverage, thereby shielding the electromagnetic interference generated by the electronic components on the circuit board. After installation, both mounting part one and mounting part two can fix the shielding cover. During the installation process, the components are pressed down by the basin, and the components are pre-fixed and installed from the mounting part two at the diagonal position of the basin to prevent the long circuit board from moving in the horizontal and vertical positions in the middle position, ensuring the reliability of the installation. The shielding cover has an opening, which allows the electronic components that do not need to be shielded and protrude from the circuit board to be exposed outside the shielding cover for better heat dissipation. The structure is simple.

[0008] Furthermore, the mounting part includes a connecting arc surface and a recessed plane. The upper end of the connecting arc surface is connected to the shielding cover to form an integral part, and the lower end of the connecting arc surface is connected to the recessed plane to form an integral part. The recessed plane, which is parallel to the shielding cover, is provided with a mounting hole.

[0009] The above configuration allows the mounting section to be integrated with the shielding cover, making it easy to cover and install the shielding cover onto the circuit board via the mounting section.

[0010] Furthermore, the folding part is vertically connected to the shielding cover to form an integral part, and a gap is formed between the folding part and the mounting part. The folding part is provided with a limiting part and a positioning part that is perpendicular to the shielding cover.

[0011] The above configuration, with limiting and positioning parts on the folding part, allows the shielding cover to accurately cover the circuit board. The limiting part also vertically limits the shielding cover, creating a gap between the folding part and the mounting part after the shielding cover covers the circuit board. This allows the electronic components inside the cavity to dissipate heat through the gap, thus preventing the folding part from dissipating heat through the gap, resulting in a simple structure.

[0012] Furthermore, the folding portion includes two first folding portions arranged opposite each other along the width direction of the shielding cover and two second folding portions arranged opposite each other along the length direction of the shielding cover. One end of the first folding portion and one end of the second folding portion are both connected to the shielding cover to form an integral part. The other ends of the first folding portion and the other ends of the second folding portion extend from the upper end face of the shielding cover to the lower end face.

[0013] The above configuration allows the shielding cover, the mounting part, and the first and second folding parts located on the four sides of the shielding cover to form a receiving cavity that matches the circuit board.

[0014] Furthermore, gaps are formed between one side of the first folded portion and one side of the second folded portion and the two sides of the connecting arc surface.

[0015] The above design facilitates heat dissipation of electronic components covered within the cavity through gaps.

[0016] Furthermore, the limiting part includes a first limiting part and a second limiting part, and the positioning part includes a first positioning part and a second positioning part. The first folding part is provided with a first limiting part and a first positioning part. One end of the first limiting part is connected to the first folding part to form an integral part. The other end of the first limiting part is folded outward and abuts against the outer side of the first folding part to form a first limiting notch. One end of the first positioning part is connected to the first folding part to form an integral part. The other end of the first positioning part extends outward perpendicular to the shielding cover.

[0017] With the above settings, the shielding cover can be limited and positioned in the width direction of the shielding cover by the first limiting notch and the first positioning part.

[0018] Furthermore, the second folding part is provided with a second limiting part or a second positioning part. One end of the second limiting part is connected to the second folding part to form an integral part, and the other end of the second limiting part is folded outward and abuts against the outer side of the second folding part to form a second limiting notch. One end of the second positioning part is connected to the second folding part to form an integral part, and the other end of the second positioning part extends outward perpendicular to the shielding cover.

[0019] With the above settings, the shielding cover can be limited and positioned along its length by means of the second limiting notch and the second positioning part.

[0020] Furthermore, a boss is formed on the shielding cover body, protruding from the lower end face to the upper end face. The opening includes a circular opening and a square opening, which are located on one side of the pelvis or on one side of the boss.

[0021] The above configuration facilitates the accommodation of protruding electronic components on the circuit board while covering the electronic components within the accommodating cavity; when the shielding cover covers the circuit board, it allows protruding electronic components on the circuit board that need to be exposed to the outside to pass through the openings in the shielding cover to match the circuit board.

[0022] Furthermore, the second mounting part includes a second connecting arc surface and a second recessed plane. The upper end of the second connecting arc surface is connected to the shielding cover to form an integral part, and the lower end of the second connecting arc surface is connected to the second recessed plane to form an integral part. The second recessed plane, which is parallel to the shielding cover, is provided with a second mounting hole.

[0023] The above configuration allows the mounting section 2 to be integrated with the shielding cover, thus facilitating the installation of the shielding cover onto the circuit board via the mounting section 2. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0025] Figure 2 This is a schematic diagram of the overall structure of this utility model from another angle.

[0026] Figure 3 for Figure 1 Enlarged view of point a in the middle.

[0027] Figure 4 for Figure 1 Enlarged view of section b in the middle. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0029] like Figure 1-3As shown, this utility model provides a navigation host circuit board shielding cover with a positioning structure, including a shielding cover body 1. The shielding cover body 1 is provided with two or more mounting portions 11. The corners of the shielding cover body 1 are recessed from the upper end face 12 to the lower end face 13 to form the mounting portion 11. The mounting portion 11 includes a connecting arc surface 111 and a recessed plane 112. The upper end of the connecting arc surface 111 is connected to the shielding cover body 1 to form an integral part, and the lower end of the connecting arc surface 111 is connected to the recessed plane 112 to form an integral part. The shielding cover 1 is an integral unit with a recessed plane 112 parallel to the shielding cover 1, which has a mounting hole 113. This allows the mounting part 11 to be connected to the shielding cover 1 to form an integral unit. During installation, the shielding cover 1 can be fixed to the circuit board by screws passing through the mounting hole 113 on the mounting part 11, thereby achieving the purpose of shielding the electromagnetic interference generated by the electronic components on the circuit board. The opening on the shielding cover allows the electronic components protruding from the circuit board to be exposed outside the shielding cover 1 for better heat dissipation.

[0030] like Figure 1-2 As shown, a folding portion is provided between the mounting portions 11 at the two corners. The folding portion is perpendicularly connected to the shielding cover 1 to form an integral unit. A gap is formed between the folding portion and the mounting portion 11. A receiving cavity 14 is formed between the mounting portion 11 and the folding portion located on the outer edge of the shielding cover 1. The folding portion includes two first folding portions 21 arranged opposite each other along the width direction of the shielding cover 1 and two second folding portions 22 arranged opposite each other along the length direction of the shielding cover 1. One end of the first folding portion 21 and one end of the second folding portion 22 are both connected to the shielding cover. The first fold 21 and the second fold 22 are connected to form a whole. The other end of the first fold 21 and the other end of the second fold 22 extend from the upper end face 12 of the shield cover body to the lower end face 13. A gap is formed between one side of the first fold 21 and the other side of the second fold 22 and the two sides of the connecting arc surface 111, so that the shield cover body 1, the mounting part 11, and the first fold 21 and the second fold 22 arranged on the four sides of the shield cover body form a receiving cavity 14 that matches the circuit board. The gap facilitates the heat dissipation of the electronic components covered in the receiving cavity 14.

[0031] In this embodiment, the folding portion is provided with a limiting portion and a positioning portion perpendicular to the shielding cover 1. The limiting portion includes a first limiting portion 31 and a second limiting portion 32, and the positioning portion includes a first positioning portion 41 and a second positioning portion 42, as shown below. Figure 1-2As shown, the first folding part 21 has two parts. One first folding part has a first limiting part 31 and a first positioning part 41, and the other first folding part has a first positioning part 41. One end of the first positioning part 41 is connected to the first folding part 21 to form an integral part, and the other end of the first positioning part 41 extends outward perpendicularly to the shielding cover 1. One end of the first limiting part 31 is connected to the first folding part 21 to form an integral part, and the other end of the first limiting part 31 is folded outward and abuts against the outer side 211 of the first folding part to form a first limiting notch 311. The first limiting notch 311 is matched with the protruding part on the circuit board, and the first positioning part 41 is engaged with the card hole on the circuit board. In this way, by setting the first limiting notch 311 and the first positioning part 41, the shielding cover 1 can be limited and positioned in the width direction of the shielding cover.

[0032] like Figure 1-2 As shown, there are two second folding parts 22. One second folding part 22 is provided with a second positioning part 42. One end of the second positioning part 42 is connected to the second folding part 22 to form an integral part. The other end of the second positioning part 42 extends outward perpendicularly to the shielding cover 1. The other second folding part is provided with a second limiting part 32. One end of the second limiting part 32 is connected to the second folding part 22 to form an integral part. The other end of the second limiting part 32 is folded outward and abuts against the outer side 221 of the second folding part to form a second limiting notch 322. In this way, by setting the second limiting notch 322 and the second positioning part 42, the shielding cover 1 can be limited and positioned in the length direction of the shielding cover 1. Thus, the shielding cover 1 can be limited and positioned in the width and length directions of the shielding cover 1 respectively, so that the shielding cover 1 can accurately cover the circuit board of the navigation host.

[0033] like Figure 1As shown, the shielding cover 1 is recessed from its upper end face 12 to its lower end face 13 to form a basin 15. Mounting portions 52 are respectively provided on both sides of the shielding cover 15, recessed from its upper end face to its lower end face. The mounting portions 52 are located diagonally opposite each other within the basin. This allows the basin 15 above the shielding cover 1 to both press down on components such as chips on the circuit board and to provide space for other parts when mounted on the vehicle body. The shielding cover 1 is recessed from its lower end face 13 to its lower end face... The upper end face 12 protrudes to form a boss 16, which facilitates the accommodation of electronic components protruding on the circuit board and can cover the electronic components within the accommodating cavity 14. The shielding cover 1 has two or more openings that match the electronic components. The openings include a circular opening 17 and a square opening 18. The circular opening 17 and the square opening 18 are located on one side of the basin 15 or on one side of the boss 16. This allows the electronic components that protrude on the circuit board and need to be exposed to the outside to pass through the openings on the shielding cover and match the circuit board when the shielding cover 1 covers the circuit board.

[0034] like Figure 2 As shown, in this embodiment, a mounting portion 52 is further provided on the side of the shielding cover 1 near the second folding portion 22, recessed from the upper end face 12 to the lower end face 13 of the shielding cover 1. The mounting portion 52 includes a connecting arc surface 521 and a recessed plane 522. The upper end of the connecting arc surface 521 is connected to the shielding cover 1 to form an integral part, and the lower end of the connecting arc surface 521 is connected to the recessed plane 522 to form an integral part, thereby connecting the mounting portion 52 to the shielding cover 1 to form an integral part. The two sides of the connecting arc surface 521 are respectively connected to the second folding portion 22. A gap is formed between the folded portions 22. This gap is formed by the edge of the second folded portion 22 and the edge of the connecting arc surface 52, thereby improving the heat dissipation effect of the electronic components covered in the receiving cavity 14. The recessed plane 522, which is parallel to the shielding cover 1, is provided with mounting holes 523, so that the shielding cover 1 can be covered and installed on the circuit board by screws passing through the mounting holes 523 on the mounting portion 52. The joint action of the mounting portion 11 and the mounting portion 52 makes the shielding cover 1 more stable on the circuit board.

[0035] The working principle of this utility model is as follows: A receiving cavity 14 matching the circuit board is formed between the shielding cover 1, the folding part, and the mounting part 11, so that the receiving cavity 14 can just cover the circuit board of the navigation host, thereby improving the structural compactness of the shielding cover and the circuit board after combination, reducing the space occupied inside the navigation host and improving space utilization. At the same time, the limiting part and the positioning part set on the folding part work together to ensure that the shielding cover can accurately cover the circuit board and prevent the shielding cover and the circuit board from being misaligned or offset. Thus, during installation, the shielding cover can be fixed to the circuit board by the fastener passing through the mounting part 11 and the mounting part 2 52 to achieve coverage, thereby shielding the electromagnetic interference generated by the electronic components on the circuit board. The shielding cover has an opening, which allows the part of the electronic components protruding from the circuit board to be exposed outside the shielding cover for better heat dissipation. At the same time, a gap is formed between the folding part and the mounting part 11, allowing the electronic components covered in the receiving cavity to dissipate heat through the gap.

Claims

1. A shielding cover for a navigation host circuit board with a positioning structure, characterized in that: The shielding cover includes a shielding cover body, which has two or more mounting portions and openings that match electronic components. The corners of the shielding cover body are recessed from the upper end to the lower end to form mounting portions. A folding portion is provided between the two mounting portions. A receiving cavity is formed between the mounting portions and the folding portion located on the outer edge of the shielding cover body. A basin is formed in the middle of the shielding cover body from the upper end to the lower end to form a basin. Mounting portions are provided on both sides of the shielding cover body, which are recessed from the upper end to the lower end to form mounting portions. The mounting portions are located at diagonal positions of the basins.

2. The navigation host circuit board shielding cover with a positioning structure according to claim 1, characterized in that: The mounting part includes a connecting arc surface and a recessed plane. The upper end of the connecting arc surface is connected to the shielding cover to form an integral part, and the lower end of the connecting arc surface is connected to the recessed plane to form an integral part. The recessed plane, which is parallel to the shielding cover, is provided with a mounting hole.

3. The navigation host circuit board shielding cover with a positioning structure according to claim 1, characterized in that: The folding part is vertically connected to the shielding cover to form an integral part, and a gap is formed between the folding part and the mounting part. The folding part is provided with a limiting part and a positioning part that is perpendicular to the shielding cover.

4. A navigation host circuit board shielding cover with a positioning structure according to claim 3, characterized in that: The folding portion includes two first folding portions arranged opposite each other along the width direction of the shielding cover and two second folding portions arranged opposite each other along the length direction of the shielding cover. One end of the first folding portion and one end of the second folding portion are both connected to the shielding cover to form an integral part. The other end of the first folding portion and the other end of the second folding portion extend from the upper end of the shielding cover to the lower end.

5. A navigation host circuit board shielding cover with a positioning structure according to claim 4, characterized in that: A gap is formed between one side of the first fold and one side of the second fold and the two sides of the connecting arc surface.

6. A navigation host circuit board shielding cover with a positioning structure according to claim 3, characterized in that: The limiting part includes a first limiting part and a second limiting part, and the positioning part includes a first positioning part and a second positioning part. The first folding part is provided with a first limiting part and a first positioning part. One end of the first limiting part is connected to the first folding part to form an integral part. The other end of the first limiting part is folded outward and abuts against the outer side of the first folding part to form a first limiting notch. One end of the first positioning part is connected to the first folding part to form an integral part. The other end of the first positioning part extends outward perpendicular to the shielding cover.

7. A navigation host circuit board shielding cover with a positioning structure according to claim 4, characterized in that: The second folding part is provided with a second limiting part or a second positioning part. One end of the second limiting part is connected to the second folding part to form an integral part. The other end of the second limiting part is folded outward and abuts against the outer side of the second folding part to form a second limiting notch. One end of the second positioning part is connected to the second folding part to form an integral part. The other end of the second positioning part extends outward perpendicular to the shielding cover.

8. A navigation host circuit board shielding cover with a positioning structure according to claim 1, characterized in that: The shielding cover body is recessed from the upper end to the lower end to form a basin cavity.

9. A navigation host circuit board shielding cover with a positioning structure according to claim 1, characterized in that: The shielding cover has a boss that protrudes from the lower end to the upper end; the opening includes a circular opening and a square opening, which are located on one side of the pelvis or on one side of the boss.

10. A navigation host circuit board shielding cover with a positioning structure according to claim 1, characterized in that: The shielding cover body near the second folding part is recessed from the upper end face of the shielding cover body to form a second mounting part. The second mounting part includes a second connecting arc surface and a second recessed plane. The upper end of the second connecting arc surface is connected to the shielding cover body to form an integral part, and the lower end of the second connecting arc surface is connected to the second recessed plane to form an integral part. The second recessed plane is provided with a second mounting hole on it, which is parallel to the shielding cover body.

Images