Fixed plate-to-plate assembly and latching fixture

Abstract

The utility model relates to a kind of fixed plate-to-plate assembly and locking fixture.The fixed plate-to-plate assembly includes: shell, shell includes shell body, the plurality of first fixed column of convex in shell body and the plurality of second fixed column of convex in shell body;First circuit assembly, first circuit assembly includes the first circuit board of screw connection fixed in first fixed column and the first connector of being arranged on the upper surface of first circuit board;And second circuit assembly, second circuit assembly includes the second circuit board of screw connection fixed in second fixed column and the second connector of being arranged on the lower surface of second circuit board, second connector is inserted in first connector, to form fixed plate-to-plate connection structure;Effectively reduce assembly process and reduce the cost of parts, improve the overall competitiveness of camera module.

Description

Technical Field

[0001] This utility model relates to the field of camera module technology, and in particular to a fixed plate-to-plate assembly and a locking fixture. Background Technology

[0002] With technological and economic development, the trend towards automotive automation and intelligence has made in-vehicle camera modules increasingly important. Drivers are now relying more and more on in-vehicle cameras for driver assistance functions such as blind spot detection, collision warning, and autonomous driving. As more and more cameras are installed in cars, the universal and platform-based design of in-vehicle cameras is becoming increasingly crucial.

[0003] Infrared camera modules are among the most commonly used automotive camera modules. These cameras are typically used inside the driver's cabin. Due to space limitations, camera modules usually employ a stacked structure of multiple PCBAs (Printed Circuit Boards Assembled). Signal conversion and transmission are required between these PCBAs, necessitating board-to-board connectors. However, due to assembly tolerances, the connectors between PCBAs are generally flexible, using FPCs (Flexible Printed Circuits) and board-to-board connectors. However, FPCs and board-to-board connectors involve more components, complicating the assembly process. Additionally, some PCBAs are connected via floating board-to-board connectors. However, floating board-to-board connectors are more expensive and larger, hindering cost control and electronic component layout in camera module development. Utility Model Content

[0004] Therefore, it is necessary to provide a fixed board-to-board assembly and locking fixture to address the problems of assembly difficulties, cost control difficulties, and layout difficulties in existing signal transmission schemes between PCBA boards.

[0005] On one hand, this application provides a fixed board-to-board assembly, including:

[0006] The housing includes a shell, a plurality of first fixing posts protruding from the shell, and a plurality of second fixing posts protruding from the shell; a first circuit assembly including a first circuit board screwed to the first fixing posts and a first connector disposed on the upper surface of the first circuit board; and a second circuit assembly including a second circuit board screwed to the second fixing posts and a second connector disposed on the lower surface of the second circuit board, the second connector being inserted into the first connector to form a fixed board-to-board connection structure.

[0007] In one embodiment, the housing further includes a pressure-bearing step protruding from the housing, the pressure-bearing step abutting against the lower surface of the first circuit board.

[0008] In one embodiment, the upper surface of the first circuit board has a plurality of exposed copper surfaces, which are located at the edge of the first circuit board and above the pressure-bearing step.

[0009] In one embodiment, the housing further includes a plurality of limiting pins, and the second circuit board has a plurality of limiting holes corresponding to the limiting pins, wherein the limiting pins are inserted into the limiting holes.

[0010] On the other hand, this application provides a locking fixture for assembling a fixed plate-to-plate assembly as described above, comprising: a fixing base having a fixing cavity for mounting the housing of the fixed plate-to-plate assembly; and a top cover having a cover body detachably mounted to the fixing base and having a window, a first limiting portion extending from one side of the window into the fixing cavity, and a second limiting portion extending from the other side of the window into the fixing cavity, wherein the extension length of the first limiting portion is greater than the extension length of the second limiting portion, for abutting against a first circuit board of the fixed plate-to-plate assembly, and forming a gap between the second limiting portion and the first circuit board.

[0011] In one embodiment, the top cover includes two first limiting portions, and a second limiting portion is located between the two first limiting portions.

[0012] In one embodiment, the top cover includes two second limiting portions, which are disposed at intervals.

[0013] In one embodiment, the fixing base includes a base body with the fixing cavity and two positioning posts protruding from the base body. The cover body has two positioning holes located on both sides of the opening. When the upper cover is installed on the fixing base, the positioning posts are respectively inserted into the positioning holes.

[0014] In one embodiment, one of the positioning holes is an oblong hole.

[0015] In one embodiment, the side of the fixing base has an clearance opening that communicates with the fixing cavity.

[0016] In summary, the first and second circuit boards of the fixed board-to-board assembly of this application form a fixed board-to-board connection directly through the first and second connectors. Compared with the traditional connection structure of flexible circuit boards and connectors, the number of parts is reduced, thereby effectively reducing assembly steps and lowering part costs. Compared with the traditional connection structure of floating connectors, the size is smaller, and the layout of the first and second circuit components can be designed more reasonably, thereby improving the overall competitiveness of the camera module.

[0017] The locking fixture of this application can assist in the screw fastening of fixed board-to-board assemblies. It restricts the movement of the board by the friction between the first limiting part and the first board, and restricts the deformation of the board by forming a floating limiting point by the second limiting part. It weakens or eliminates the stress effect during screw fastening, and realizes the direct connection of two board-to-board connectors through the fixed board-to-board connector, thereby reducing assembly steps and reducing component costs. Attached Figure Description

[0018] Figure 1 A perspective view of a fixed plate-to-plate assembly provided for one embodiment of this application;

[0019] Figure 2 A perspective view of the housing of a fixed plate-to-plate assembly according to the above embodiments of this application is shown;

[0020] Figure 3 A perspective view of the first circuit board of the fixed board-to-board assembly according to the above embodiments of this application is shown;

[0021] Figure 4 A plan view of the first circuit board of the fixed board-to-board assembly according to the above embodiments of this application is shown;

[0022] Figure 5 A perspective view of the second circuit board of the fixed board-to-board assembly according to the above embodiments of this application is shown;

[0023] Figure 6 A perspective view of a locking fixture provided for one embodiment of this application;

[0024] Figure 7 An exploded view of the locking fixture according to the above embodiments of this application is shown;

[0025] Figure 8 A perspective view of the top cover of the locking fixture according to the above embodiments of this application is shown;

[0026] Figure 9 A perspective view of the fixing base of the locking fixture according to the above embodiments of this application is shown;

[0027] Figure 10 A cross-sectional schematic diagram of the locking fixture according to the above embodiments of this application is shown.

[0028] Reference numerals: 100, Fixed plate-to-plate assembly; 110, Outer shell; 111, Housing; 112, First fixing post; 113, Second fixing post; 114, Pressure-bearing step; 115, Limiting pin; 120, First circuit assembly; 121, First circuit board; 122, First connector; 130, Second circuit assembly; 131, Second circuit board; 132, Second connector; 133, Limiting hole; 200, Locking fixture; 210, Fixing seat; 211, Fixing cavity; 212, Seat body; 213, Positioning post; 214, Clearance opening; 220, Top cover; 221, Cover body; 222, First limiting part; 223, Second limiting part; 224, Window; 225, Positioning hole. Detailed Implementation

[0029] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0030] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 of this utility model.

[0031] 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 at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0035] Addressing the challenges of assembly difficulties, cost control issues, and layout difficulties in current signal transmission solutions between PCBA boards, this application provides a fixed board-to-board assembly and a locking fixture. This fixed board-to-board assembly connects two circuit boards via a fixed connector, reducing assembly steps and component costs, thereby enhancing the overall competitiveness of the camera module. The locking fixture assists in assembling the fixed board-to-board assembly, simplifying the assembly process.

[0036] Specifically, please refer to Figure 1 , Figure 2 , Figure 4 and Figure 5According to one aspect of this application, a fixed board-to-board assembly 100 is provided. The fixed board-to-board assembly 100 may include a housing 110, a first circuit assembly 120, and a second circuit assembly 130. The housing 110 may include a shell 111, a plurality of first fixing posts 112 protruding from the shell 111, and a plurality of second fixing posts 113 protruding from the shell 111. The first circuit assembly 120 includes a first circuit board 121 screwed to the first fixing posts 112 and a first connector 122 disposed on the upper surface of the first circuit board 121. The second circuit assembly 130 includes a second circuit board 131 screwed to the second fixing posts 113 and a second connector 132 disposed on the lower surface of the second circuit board 131. The second connector 132 is inserted into the first connector 122 to form a fixed board-to-board connection structure.

[0037] It is understood that the first circuit board 121 and the second circuit board 131 of the fixed board-to-board assembly 100 of this application form a fixed board-to-board connection directly through the first connector 122 and the second connector 132. Compared with the connection structure of traditional flexible circuit boards and connectors, the number of parts is reduced, thereby effectively reducing assembly steps and lowering the cost of parts. Compared with the connection structure of traditional floating connectors, the size is smaller, and the layout of the first circuit assembly 120 and the second circuit assembly 130 can be reasonably designed, thereby improving the overall competitiveness of the camera module.

[0038] Optionally, in some embodiments, the height of the first fixing post 112 is higher than that of the second fixing post 113, so that a two-layer fixing structure can be formed, with the first circuit board 121 fixed on the upper layer and the second circuit board 131 fixed on the lower layer, making the layout of the two circuit components more reasonable.

[0039] Optionally, such as Figure 2 As shown, in some embodiments, the housing 110 further includes a pressure-bearing step 114 protruding from the housing 111, the pressure-bearing step 114 abutting against the lower surface of the first circuit board 121. This pressure-bearing step 114 can be used to form the lower surface of the first circuit board 121. During the screw fastening process of the circuit board, it can cooperate with the limiting portion of the screw fastening fixture 200 to generate a clamping force to clamp the first circuit board 121, thereby limiting the rotation and movement of the first circuit board 121 in the horizontal direction through the frictional force between the first circuit board 121 and the limiting portion.

[0040] Optionally, such as Figure 3As shown, in some embodiments, the upper surface of the first circuit board 121 has multiple exposed copper surfaces, which are located at the edge of the first circuit board 121 and above the pressure-bearing step 114. In this way, the limiting part of the screw-locking fixture 200 abuts against the exposed copper surface of the first circuit board 121. By utilizing the wear resistance of copper material, it is possible to prevent the limiting part from scratching the first circuit board 121 during the limiting process.

[0041] Optionally, in some embodiments, both the first circuit board 121 and the second circuit board 131 have multiple vias, and both the first fixing post 112 and the second fixing post 113 have multiple screw holes, with the diameter of the vias being larger than the diameter of the screw holes. This difference in diameter between the screw holes and the vias creates a larger gap between them. This gap allows assembly tolerances to be absorbed, enabling a direct connection structure for the fixed board-to-board connector.

[0042] Optionally, such as Figure 2 and Figure 5 As shown, in some embodiments, the housing 110 further includes a plurality of limiting pins 115, and the second circuit board 131 has a plurality of limiting holes 133 corresponding to the limiting pins 115, with the limiting pins 115 inserted into the limiting holes 133. In this way, the limiting pins 115 and the limiting holes 133 cooperate with each other to restrict the movement and rotation of the second circuit board 131, ensuring that the second circuit board 131 remains stationary during the screw tightening process.

[0043] On the other hand, please refer to Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10 According to another aspect of this application, this application also provides a locking fixture 200 for assembling a fixed plate-to-plate assembly 100 as described above. The locking fixture 200 may include a fixing base 210 and a top cover 220. The fixing base 210 has a fixing cavity 211 for fixing the outer shell 110 of the fixed plate-to-plate assembly 100. The top cover 220 may include a cover body 221, a first limiting part 222, and a second limiting part 223. The cover body 221 is detachably mounted on the fixing base 210 and has a window 224. The first limiting part 222 extends from one side of the window 224 into the fixing cavity 211, and the second limiting part 223 extends from the other side of the window 224 into the fixing cavity 211. The extension length of the first limiting part 222 is greater than the extension length of the second limiting part 223. The first limiting part 222 is used to abut against the first circuit board 121 of the fixed board-to-board assembly 100 and form a gap between the second limiting part 223 and the first circuit board 121.

[0044] Understandably, when assembling the fixed board-to-board assembly 100 using the locking fixture 200, the fixed board-to-board connectors of the first circuit board 121 and the second circuit board 131 of the fixed board-to-board assembly 100 can be plugged in first and placed into the housing 110 of the fixed board-to-board assembly 100. Then, the housing 110 of the fixed board-to-board assembly 100 is installed into the fixing cavity 211 of the fixing seat 210. The housing 110 is fixed by the fixing cavity 211, thus restricting its horizontal degree of freedom. The upper cover 220 is installed on the fixing base 210, so that the first limiting part 222 of the upper cover 220 cooperates with the pressure-bearing step 114 of the outer shell 110 to press the first circuit board 121, thereby restricting the vertical degree of freedom of the first circuit board 121; finally, using a screw fastening machine or other screw fastening tools, the first circuit board 121 and the second circuit board 131 are respectively screwed onto the first fixing post 112 and the second fixing post 113 of the outer shell 110 to fix the first circuit board 121 and the second circuit board 131 respectively. During the screw fastening process, the downward pressure generated by the screw fastening machine will press the upper cover 220 and the fixing seat 210 of the fastening fixture 200 together. The downward pressure of the screw fastening machine is transmitted through the fastening fixture 200 to the first circuit board 121 which is pressed by the first limiting part 222 and the pressure bearing step 114. However, since the first limiting part 222 and the pressure bearing step 114 are vertically aligned, the upper and lower force-bearing areas of the first circuit board 121 are the same. The horizontal torsional force generated during screw fastening will be offset by the frictional force generated by the clamping force of the first limiting part 222 and the pressure bearing step 114, thereby restricting the movement of the first circuit board 121. Meanwhile, through the second limiting part 223 located on the other side, a floating limiting point is formed on the other side of the first circuit board 121. When the first circuit board 121 tilts upward, the vertical torsional force generated during screw fastening will be offset by the second limiting part 223, thereby restricting the deformation of the first circuit board 121. In this way, the deformation of the first circuit board 121 can be controlled by limiting the movement, weakening or eliminating the stress effect during screw fastening, and finally achieving the required screw fastening.

[0045] In summary, the locking fixture 200 of this application can assist in the screw fastening of the fixed board-to-board assembly 100. It restricts the movement of the circuit board by the friction between the first limiting part 222 and the first circuit board 121, and restricts the deformation of the circuit board by forming a floating limiting point by the second limiting part 223. It weakens or eliminates the stress effect during screw fastening, and realizes the direct connection of two circuit boards through the fixed board-to-board connector, thereby reducing assembly steps and reducing component costs.

[0046] Optionally, such as Figure 8As shown, in some embodiments, the top cover 220 may include two first limiting portions 222, and a second limiting portion 223 located between the two first limiting portions 222. Thus, the clamping force generated by the two first limiting portions 222 acts on both ends of one side of the first circuit board 121, and the limiting force formed by the second limiting portion 223 acts on the middle of the other side of the first circuit board 121, forming a stable three-point constraint structure to ensure that the first circuit board 121 does not shift as a whole when the screws are tightened.

[0047] Optionally, such as Figure 8 As shown, in some embodiments, the top cover 220 may include two second limiting portions 223, which are spaced apart. A fixing post may be arranged between the two second limiting portions 223, so that two floating limiting points can be formed on the other side of the first circuit board 121. Together with the two first limiting portions 222, the upward tilting of the first circuit board 121 can be better suppressed, and deformation of the first circuit board 121 can be avoided.

[0048] Optionally, such as Figure 8 and Figure 9 As shown, in some embodiments, the fixing base 210 includes a base body 212 with a fixing cavity 211 and two positioning posts 213 protruding from the base body 212. The cover body 221 has two positioning holes 225, which are located on both sides of the opening 224. When the upper cover 220 is installed on the fixing base 210, the positioning posts 213 are respectively inserted into the positioning holes 225. In this way, the cooperation of the positioning posts 213 and the positioning holes 225 can play a guiding role, which can facilitate the quick installation of the upper cover 220 on the fixing base 210, improve assembly efficiency, and also form a fault-prevention guarantee to avoid the problem of incorrect or reversed installation.

[0049] Preferably, such as Figure 8 As shown, in some embodiments, one of the positioning holes 225 is an oblong hole. In this way, the oblong hole can absorb assembly errors, achieve tolerance compatibility, and reduce the assembly difficulty of the top cover 220 and the fixing seat 210.

[0050] Optionally, such as Figure 9 As shown, in some embodiments, the side of the mounting base 210 has a clearance opening 214 that communicates with the mounting cavity 211. This clearance opening 214 can be used to accommodate some interfaces provided on the circuit board, so as to avoid some circuit boards being difficult to install into the mounting cavity 211 of the mounting base 210 due to the presence of side interfaces.

[0051] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A fixed plate-to-plate assembly, characterized in that, include: The outer casing includes a housing, a plurality of first fixing posts protruding from the housing, and a plurality of second fixing posts protruding from the housing; A first circuit assembly, the first circuit assembly including a first circuit board screwed to the first fixing post and a first connector disposed on the upper surface of the first circuit board; as well as The second circuit assembly includes a second circuit board screwed to the second fixing post and a second connector disposed on the lower surface of the second circuit board. The second connector is inserted into the first connector to form a fixed board-to-board connection structure.

2. The fixed plate-to-plate assembly according to claim 1, characterized in that, The housing also includes a pressure-bearing step protruding from the housing, the pressure-bearing step abutting against the lower surface of the first circuit board.

3. The fixed plate-to-plate assembly according to claim 2, characterized in that, The upper surface of the first circuit board has multiple exposed copper surfaces, which are located at the edge of the first circuit board and above the pressure-bearing step.

4. The fixed plate-to-plate assembly according to claim 1, characterized in that, The housing also includes multiple limiting pins, and the second circuit board has multiple limiting holes corresponding to the limiting pins, with the limiting pins inserted into the limiting holes.

5. A locking fixture for assembling a fixed plate-to-plate assembly as described in any one of claims 1 to 4, characterized in that, include: The mounting base has a fixing cavity for mounting the housing of the fixed plate-to-plate assembly; and The top cover includes a cover body detachably mounted to the fixing base and having a window, a first limiting portion extending from one side of the window into the fixing cavity, and a second limiting portion extending from the other side of the window into the fixing cavity. The extension length of the first limiting portion is greater than the extension length of the second limiting portion, and it is used to abut against the first circuit board of the fixed board-to-board assembly and form a gap between the second limiting portion and the first circuit board.

6. The locking fixture according to claim 5, characterized in that, The top cover includes two first limiting portions, and the second limiting portion is located between the two first limiting portions.

7. The locking fixture according to claim 5, characterized in that, The upper cover includes two second limiting portions, which are arranged at intervals.

8. The locking fixture according to any one of claims 5 to 7, characterized in that, The fixing base includes a base body with the fixing cavity and two positioning posts protruding from the base body. The cover body has two positioning holes located on both sides of the opening. When the upper cover is installed on the fixing base, the positioning posts are respectively inserted into the positioning holes.

9. The locking fixture according to claim 8, characterized in that, One of the positioning holes is an oblong hole.

10. The locking fixture according to any one of claims 5 to 7, characterized in that, The side of the fixing base has an clearance opening that connects to the fixing cavity.

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