A pre-fixing structure for mounting a PCBA board on a die-cast part and a vehicle-mounted display screen

Abstract

The utility model relates to the technical fields of vehicle-mounted display screen, more particularly to a kind of pre-fixing structure for PCBA board installation on die casting and vehicle-mounted display screen, pre-fixing structure includes die casting and PCBA board, at least two buckles are provided on die casting, wherein two buckles are oppositely arranged, the opening structure corresponding with buckle position is opened on PCBA board near PCBA board edge, and the part PCBA board outside opening structure is extruded by buckle, so that opening structure produces deformation, to make the outer edge of PCBA board be clamped between two buckles.Die casting buckle is difficult to produce deformation, when buckle extrudes PCBA board edge, the extrusion force of buckle to PCBA board will make the edge portion of PCBA board produce deformation towards opening structure center, so that opening structure also appears deformation, since the edge portion of PCBA board produces deformation, then the edge of opposite two sides of PCBA board can be clamped between two buckles, so that the buckle on die casting can be used to pre-fix PCBA board, and subsequent process is facilitated to PCBA board.

Description

Technical Field

[0001] This utility model relates to the technical field of vehicle-mounted displays, and more specifically, to a pre-fixing structure for mounting PCBA boards on die-cast parts and a vehicle-mounted display. Background Technology

[0002] As die-cast components are increasingly used in automotive central control screens, PCBA boards sometimes need to be pre-fixed to them during automated assembly. One issue arises when the PCBA board has a grounding spring; it may spring off the die-cast component, making subsequent fixation impossible. Another issue is when flexible ribbon cables are connected to the PCBA board; the board's unbalanced center of gravity hinders subsequent fixing. One solution is to use clips on the die-cast component for pre-fixation. However, clips on die-cast components cannot accommodate deformation like those on ordinary plastic materials, making conventional methods of pre-fixing the PCBA board difficult. Utility Model Content

[0003] The purpose of this invention is to overcome the problem that the buckles of existing die-cast parts are difficult to deform and cannot be snapped onto PCBA boards for pre-fixation, and to provide a pre-fixation structure for PCBA boards to be mounted on die-cast parts and a vehicle display screen.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a pre-fixing structure for mounting a PCBA board on a die-cast part, including a die-cast part and a PCBA board. The die-cast part is provided with at least two buckles, wherein the two buckles are arranged opposite to each other. The PCBA board has an opening structure near the edge of the PCBA board that corresponds to the position of the buckle. The buckles press the part of the PCBA board outside the opening structure to deform the opening structure, so that the outer edge of the PCBA board is engaged between the two buckles.

[0005] In the technical solution of this application, when it is necessary to snap the opposite edges of the PCBA board between two clips, since the clips on the die-cast part are difficult to deform, and the PCBA board has an opening structure near the edge of the PCBA board that corresponds to the position of the clips, when the clips squeeze the edge of the PCBA board, the squeezing force of the clips on the PCBA board will cause the edge part of the PCBA board to deform towards the center of the opening structure, thereby also causing the opening structure to deform. Since the edge part of the PCBA board is deformed, the opposite two edges of the PCBA board can be snapped between the two clips, so that the clips on the die-cast part can be used to pre-fix the PCBA board, which facilitates the subsequent processes of the PCBA board.

[0006] Furthermore, the opening structure is an elongated hole, and the width direction of the elongated hole is parallel to the line connecting the two oppositely arranged buckles.

[0007] Furthermore, the lateral distance W between the long side of the elongated hole near the edge of the PCBA board and the edge of the PCBA board ranges from 1.5mm to 2mm.

[0008] Furthermore, the buckle includes a main body and a protrusion. One end of the main body is integrally connected to the die-cast part, and the other end of the main body is connected to the protrusion. The protrusion has a guide portion that is inclined toward the die-cast part, and the end of the guide portion that is inclined toward the die-cast part extends toward the main body to form a limiting portion.

[0009] Furthermore, the die-cast part is provided with a mounting post for supporting the PCBA board, the mounting post is provided with a support surface, and a limiting space is formed between the support surface and the limiting part along the axial direction of the mounting post.

[0010] Furthermore, the mounting post has a threaded hole, and the PCBA board has a connecting hole that matches the position of the threaded hole. Fasteners are connected to the connecting hole and the threaded hole.

[0011] Furthermore, the distance between the bodies of the two oppositely positioned clips is equal to or greater than the lateral width of the PCBA board that is clipped between the two clips.

[0012] Furthermore, the protrusions of the two buckles are arranged opposite to each other, the distance between the ends of the guide portions of the two protrusions is d, and the lateral width of the PCBA board that is snapped between the two buckles is D, where D > d, and the difference between D and d is between 1.2 mm and 1.5 mm.

[0013] Furthermore, the die-cast part is provided with a positioning post, and the positioning post is higher than the buckle. The PCBA board is provided with a positioning hole that matches the position of the positioning post, and the positioning hole is fitted onto the positioning post.

[0014] Another aspect of this utility model provides a vehicle-mounted display screen, including the pre-fixed structure as described above, wherein a display module is mounted on the die-cast part, and the display module and the PCBA board are respectively mounted on both sides of the die-cast part.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: In this utility model, since the buckles on the die-cast parts are difficult to deform, and the PCBA board has an opening structure near the edge of the PCBA board that corresponds to the buckle position, when the buckle squeezes the edge of the PCBA board, the squeezing force of the buckle on the PCBA board will cause the edge part of the PCBA board to deform towards the center of the opening structure, thereby also causing the opening structure to deform. Since the edge part of the PCBA board deforms, the opposite edges of the PCBA board can be engaged between the two buckles, so that the buckles on the die-cast parts can be used to pre-fix the PCBA board, which facilitates the subsequent processes of the PCBA board. Attached Figure Description

[0016] Figure 1 This is a perspective view of the back of the pre-fixing structure for mounting PCBA boards onto die-cast parts according to this utility model. Figure 2 Figure 1 A magnified view of a section at point B in the middle; Figure 3 for Figure 1 A 3D image of the PCBA board removed from the image; Figure 4 for Figure 3 A magnified view of a section at point A in the middle; Figure 5 This is the front view of step 1 after removing the PCBA board; Figure 6 This is a perspective view of the vehicle-mounted display screen of this utility model; Figure 7 This is a frontal view of the PCBA board in the pre-fixing structure for mounting PCBA boards on die-cast parts according to this utility model; Figure 8 This is a rear view of the PCBA board in the pre-fixed structure for mounting PCBA boards on die-cast parts according to this utility model.

[0017] In the attached diagram: 1. Die-cast part; 2. PCBA board; 3. Buckle; 4. Opening structure; 31. Main body; 32. Protrusion; 33. Guide part; 34. Limiting part; 5. Mounting post; 51. Support surface; 52. Threaded hole; 6. Connecting hole; 7. Fastener; 8. Positioning post; 9. Positioning hole; 10. Grounding spring; 13. Display module; 11. Frame; 12. Mounting bracket. Detailed Implementation

[0018] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0019] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model 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. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0020] Example 1 like Figure 1 , Figure 2 As shown, a pre-fixing structure for mounting a PCBA board 2 on a die-cast part 1 includes a die-cast part 1 and a PCBA board 2. At least two clips 3 are provided on the die-cast part 1, wherein the two clips 3 are arranged opposite to each other. An opening structure 4 corresponding to the position of the clips 3 is opened near the edge of the PCBA board 2. The clips 3 press the part of the PCBA board 2 outside the opening structure 4 to deform the opening structure 4, so that the outer edge of the PCBA board 2 is engaged between the two clips 3.

[0021] In this embodiment, when it is necessary to snap the opposite edges of the PCBA board 2 between the two clips 3, since the clips 3 on the die-cast part 1 are difficult to deform, and the PCBA board 2 has an opening structure 4 near the edge of the PCBA board 2 that corresponds to the position of the clips 3, when the clips 3 press the edge of the PCBA board 2, the pressing force of the clips 3 on the PCBA board 2 will cause the edge part of the PCBA board 2 to deform towards the center of the opening structure 4, thereby also causing the opening structure 4 to deform. Since the edge part of the PCBA board 2 deforms, the opposite two edges of the PCBA board 2 can be snapped between the two clips 3, so that the clips 3 on the die-cast part 1 can be used to pre-fix the PCBA board 2, which is convenient for subsequent processes of the PCBA board 2. It should be noted that the opening structure 4 is located near the PCBA board 2 where it engages with the clip 3. The size of the opening structure 4 should be such that when the clip 3 presses against the edge of the PCBA board 2, the edge of the PCBA board 2 can deform towards the center of the opening structure 4. This allows the two opposing clips 3 to engage the PCBA board 2 after deformation. It should also be noted that the clip 3 is integrally formed on the die-cast part 1. To ensure the strength of the clip 3, a frame 11 is integrally formed on the die-cast part 1. The clip 3 can be integrally formed on the frame 11, which also helps to define the position of the PCBA board 2. The number of clips 3 can be set as needed. When two clips are used, they are positioned opposite each other; when four clips are used, they are positioned in pairs.

[0022] like Figure 2 , Figure 7 and Figure 8 As shown, the opening structure 4 is an elongated hole, and the width direction of the elongated hole is parallel to the line connecting the two oppositely arranged clips 3. In this embodiment, since the width direction of the elongated hole is parallel to the line connecting the two oppositely arranged clips 3, when the PCBA board 2 needs to be pre-fixed, the clips 3 make it easier for the edges of the PCBA board 2 to deform in the width direction of the elongated hole when the edge of the PCBA board 2 is pressed against the clips 3. This facilitates the engagement of the opposite sides of the PCBA board 2 between the two clips 3. It should be noted that the length of the elongated hole is greater than its width. When an external force presses on the edge of the PCBA board 2 on the side of the elongated hole, the elongated hole is more likely to deform in the width direction.

[0023] like Figure 7As shown, the lateral distance W between the long side of the elongated hole near the edge of PCBA board 2 and the edge of PCBA board 2 ranges from 1.5mm to 2mm. In this embodiment, since the lateral distance W between the long side of the elongated hole near the edge of PCBA board 2 and the edge of PCBA board 2 ranges from 1.5mm to 2mm, on the one hand, when an external force presses on the edge of PCBA board 2 on the side of the elongated hole, the elongated hole can deform in the width direction of the elongated hole; on the other hand, when an external force presses on the edge of PCBA board 2 on the side of the elongated hole, and the elongated hole deforms in the width direction of the elongated hole, the edge of PCBA board 2 can withstand the compressive force of the buckle 3 without the risk of breakage. It should also be noted that the width of the elongated hole is between 2mm and 2.5mm, and the length of the elongated hole is between 19mm and 23mm.

[0024] like Figures 1 to 4 As shown, the buckle 3 includes a main body 31 and a protrusion 32. One end of the main body 31 is integrally connected to the die-cast part 1, and the other end of the main body 31 is connected to the protrusion 32. The protrusion 32 has a guide part 33 that is inclined towards the die-cast part 1. The end of the guide part 33 that is inclined towards the die-cast part 1 extends towards the main body 31 to form a limiting part 34. In this embodiment, when it is necessary to pre-fix the PCBA board 2, the PCBA board 2 is placed on the guide parts 33 of the two buckles 3, and then a force is applied to the PCBA board 2 in the direction of the die-cast part 1. Due to the reciprocity of the forces, the buckles 3 will act on the edge of the PCBA board 2 and cause the edge of the PCBA board 2 to deform towards the center of the opening structure 4. Due to the deformation of the edge of the PCBA board 2, the edges of the two opposite sides of the PCBA board 2 enter the limiting part 34 from the end of the guide part 33, and the limiting part 34 of the two buckles 3 is used to pre-fix the position of the PCBA board 2. It should be noted that if the PCBA board 2 is provided with a grounding spring 10, when the PCBA board 2 is snapped between the two clips 3, the grounding spring 10 will have an interaction force with the die-cast part 1. The force exerted by the die-cast part 1 on the grounding spring 10 will cause the PCBA board 2 to tend to detach from the die-cast part 1, and the limiting part 34 provided on the clip 3 can limit the PCBA board 2. If the PCBA board 2 is not provided with a grounding spring 10, when the width value of the direction in which the PCBA board 2 is snapped is the same as the distance value between the two main bodies 31, the two main bodies 31 can be used to pre-fix the PCBA board 2.

[0025] like Figure 5 and Figure 7As shown, the protrusions 32 of the two oppositely arranged clips 3 are positioned opposite each other. The distance between the ends of the guide portions 33 of the two protrusions 32 is d. The lateral width of the PCBA board 2, which is engaged between the two clips 3, is D, where D > d, and the difference between D and d is between 1.2 mm and 1.5 mm. In this embodiment, since the lateral width D of the PCBA board 2 is greater than the distance d between the ends of the guide portions 33 of the two protrusions 32, the clips 3 will press the edge of the PCBA board 2 during the engagement process, causing the edge of the PCBA board 2 with the opening structure 4 to deform towards the center of the opening structure 4.

[0026] Furthermore, the distance between the main bodies 31 of the two oppositely arranged clips 3 is equal to or greater than the lateral width of the PCBA board 2 that is clipped between the two clips 3. It should be noted that when a grounding spring 10 is provided on the PCBA board 2, the distance between the main bodies 31 of the two oppositely arranged clips 3 is greater than the lateral width of the PCBA board 2 that is clipped between the two clips 3. When the PCBA board 2 is clipped between the two clips 3, there is an interaction force between the grounding spring 10 and the die-cast part 1. The force exerted by the die-cast part 1 on the grounding spring 10 will cause the PCBA board 2 to tend to detach from the die-cast part 1. However, the limiting part 34 provided on the clips 3 and the force exerted by the grounding spring 10 on the PCBA board 2 can limit the PCBA board 2, thereby pre-fixing the PCBA board 2. When the PCBA board 2 is not equipped with a grounding spring 10, the distance between the main bodies 31 of the two oppositely arranged clips 3 is equal to the lateral width of the PCBA board 2 that is clipped between the two clips 3. The force exerted by the two main bodies 31 on the PCBA board 2 can also be used to pre-fix the PCBA board 2.

[0027] like Figure 3As shown, the die-cast part 1 is provided with a mounting post 5 for supporting the PCBA board 2. The mounting post 5 is provided with a support surface 51, and a limiting space is formed between the support surface 51 and the limiting part 34 along the axial direction of the mounting post 5. In this embodiment, when there is no grounding spring 10 on the PCBA board 2 that can contact the die-cast part 1, and when the width of the PCBA board 2 in the lateral direction of engaging with the buckle 3 is less than the distance between the main bodies 31 of the two oppositely arranged buckles 3, the mounting post 5 can support the PCBA board 2 due to its setting. The mounting post 5 has a support surface 51 for supporting the PCAB. When the PCAB is engaged between the two buckles 3, the bottom surface of the PCBA board 2 contacts the support surface 51. The limiting parts 34 form a limiting space along the axial direction of the mounting post 5, which can limit the PCBA board 2 along the axial direction of the mounting post 5. It should be noted that the distance of the limiting space along the axial direction of the mounting post 5 should be adapted to the thickness of the PCBA board 2. When the PCBA board 2 is snapped between the two clips 3 and the PCBA board 2 is located on the support surface 51, the limiting space formed between the support surface 51 and the limiting parts 34 along the axial direction of the mounting post 5 allows the PCBA board 2 to be accommodated in the limiting space, thus ensuring reliable pre-fixation of the PCBA board 2. The support surface 51 can be set on the end face of the mounting post 5, or an annular boss surface can be formed on the circumferential surface of the mounting post 5 for supporting the PCBA board 2. It should also be noted that the number of mounting posts 5 can be set as needed, and can be set to 2 or 3.

[0028] like Figure 3 As shown, the mounting post 5 has a threaded hole 52, and the PCBA board 2 has a connecting hole 6 that matches the position of the threaded hole 52. Fasteners 7 are connected to the connecting hole 6 and the threaded hole 52. In this embodiment, because the mounting post 5 has a threaded hole 52 and the PCBA board 2 has a connecting hole 6, the PCBA board 2 can be fixed using the fasteners 7 connected to the connecting hole 6 and the threaded hole 52. It should be noted that the fasteners 7 can be fastening screws.

[0029] Example 2 like Figures 1 to 5 , Figure 7 and Figure 8As shown, the difference between Embodiment 2 and Embodiment 1 is that the die-cast part 1 is provided with a positioning post 8, and the positioning post 8 is higher than the buckle 3. The PCBA board 2 has a positioning hole 9 that matches the position of the positioning post 8, and the positioning hole 9 is fitted onto the positioning post 8. In this embodiment, the positioning post 8 facilitates the positioning of the PCBA board 2 between the two buckles 3. Since the height of the positioning post 8 is higher than the height of the buckle 3, the positioning hole 9 on the PCBA board 2 can be fitted onto the positioning post 8 for positioning, thus avoiding the buckle 3 being higher than the positioning post 8 and affecting the positioning function of the positioning post 8.

[0030] Example 3 like Figure 6 As shown, a vehicle-mounted display screen includes the pre-fixed structure described above. A display module 13 is mounted on a die-cast part 1, and the display module 13 and PCBA board 2 are respectively mounted on both sides of the die-cast part 1. It should be noted that the display module 13 is mounted on the front side of the die-cast part 1, the PCBA board 2 is mounted on the back side of the die-cast part 1, and a mounting bracket 12 for connecting to the vehicle body is also provided on the back side of the die-cast part 1.

[0031] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0032] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A pre-fixing structure for mounting PCBA boards onto die-cast parts, characterized in that, The assembly includes a die-cast part (1) and a PCBA board (2). The die-cast part (1) is provided with at least two buckles (3), wherein the two buckles (3) are arranged opposite to each other. The PCBA board (2) has an opening structure (4) near the edge of the PCBA board (2) that corresponds to the position of the buckle (3). The buckle (3) presses the part of the PCBA board (2) outside the opening structure (4) to deform the opening structure (4) so ​​that the outer edge of the PCBA board (2) is engaged between the two buckles (3).

2. The pre-fixing structure for mounting PCBA boards on die-cast parts according to claim 1, characterized in that, The opening structure (4) is an elongated hole, and the width direction of the elongated hole is parallel to the line connecting the two oppositely arranged buckles (3).

3. The pre-fixing structure for mounting PCBA boards on die-cast parts according to claim 2, characterized in that, The lateral distance W between the long side of the elongated hole near the edge of the PCBA board (2) and the edge of the PCBA board ranges from 1.5 mm to 2 mm.

4. The pre-fixing structure for mounting PCBA boards on die-cast parts according to claim 1, characterized in that, The buckle (3) includes a main body (31) and a protrusion (32). One end of the main body (31) is integrally connected to the die casting (1), and the other end of the main body (31) is connected to the protrusion (32). The protrusion (32) has a guide (33) that is inclined toward the die casting (1). The end of the guide (33) that is inclined toward the die casting (1) extends toward the main body (31) to form a limiting part (34).

5. The pre-fixing structure for mounting PCBA boards on die-cast parts according to claim 4, characterized in that, The die-cast part (1) is provided with a mounting post (5) for supporting the PCBA board (2). The mounting post (5) is provided with a support surface (51). A limiting space is formed between the support surface (51) and the limiting part (34) along the axial direction of the mounting post (5).

6. The pre-fixing structure for mounting PCBA boards on die-cast parts according to claim 5, characterized in that, The mounting post (5) has a threaded hole (52), and the PCBA board (2) has a connecting hole (6) that matches the position of the threaded hole (52). Fasteners (7) are connected to the connecting hole (6) and the threaded hole (52).

7. The pre-fixing structure for mounting PCBA boards on die-cast parts according to claim 4, characterized in that, The distance between the bodies (31) of the two oppositely positioned buckles (3) is equal to or greater than the lateral width of the PCBA board (2) snapped between the two buckles (3).

8. The pre-fixing structure for mounting PCBA boards on die-cast parts according to claim 4, characterized in that, The protrusions (32) of the two buckles (3) are arranged opposite to each other. The distance between the ends of the guides (33) of the two protrusions (32) is d. The lateral width of the PCBA board that is snapped between the two buckles (3) is D, and D > d. The difference between D and d is between 1.2 mm and 1.5 mm.

9. The pre-fixing structure for mounting PCBA boards on die-cast parts according to claim 1, characterized in that, The die-cast part (1) is provided with a positioning post (8), and the positioning post (8) is higher than the buckle (3). The PCBA board (2) is provided with a positioning hole (9) that matches the position of the positioning post (8), and the positioning hole (9) is fitted onto the positioning post (8).

10. A vehicle-mounted display screen, characterized in that, Including the pre-fixed structure as described in any one of claims 1 to 9, a display module (13) is mounted on the die-cast part (1), and the display module (13) and the PCBA board (2) are respectively mounted on both sides of the die-cast part (1).

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