Pre-fixed structure and electrical connection device

Abstract

This application discloses a pre-fixing structure and an electrical connection device, belonging to the field of electrical connection technology. The pre-fixing structure includes a metal part and a plastic part. The metal part includes a main body and a connecting structure. The connecting structure includes a first connecting part and a second connecting part, which are respectively connected to opposite sides of the main body in a first direction. The plastic part is integrally formed with the main body, and both the first and second connecting parts extend to the outside of the plastic part. The first connecting part is used for connection with a circuit board, and the second connecting part is used for detachable connection with electronic devices. The first direction is perpendicular to the first surface of the circuit board. Through the above technical solution, the pre-fixing structure has both the stable positioning capability provided by the plastic part and the robust connection performance of the metal part. At the same time, the pre-fixing structure is reusable, which helps to reduce usage costs and maintenance difficulty.

Description

Technical Field

[0001] This application relates to the field of fixed structure technology, and in particular to a pre-fixed structure and electrical connection device. Background Technology

[0002] In electronic devices, electronic components typically need to be mounted and fixed to circuit boards. Common mounting methods include soldering and threaded mounting. Soldering makes disassembly and repair difficult. Threaded mounting requires flipping the circuit board after installation to tighten the screws, and the component is prone to falling off during this process. Therefore, there is a pressing need to design a detachable pre-fixed structure that maintains the component's position during flipping. Summary of the Invention

[0003] This application provides a pre-fixed structure and electrical connection device to at least partially solve the above-mentioned technical problems.

[0004] To achieve the above objectives, according to a first aspect of this application, a pre-fixing structure is provided for pre-fixing electronic devices to a circuit board, the pre-fixing structure comprising a metal part and a plastic part; The metal part includes a main body and a connecting structure. The connecting structure includes a first connecting part and a second connecting part, which are respectively connected to opposite sides of the main body in a first direction. The plastic part is integrally formed with the main body, and both the first connecting part and the second connecting part extend to the outside of the plastic part; the first connecting part is used to connect with the circuit board, and the second connecting part is used to detachably connect with electronic devices; wherein, the first direction is perpendicular to the first surface of the circuit board.

[0005] In some embodiments of this application, a first positioning portion is provided on the plastic part. Both the first positioning portion and the first connecting portion are located on the side of the plastic part facing the circuit board in a first direction. The first positioning portion is used to cooperate with the circuit board to restrict the relative movement of the plastic part and the circuit board in a direction parallel to the first board surface.

[0006] In some embodiments of this application, the plastic part further includes a guide portion. Both the guide portion and the second connecting portion are located on the side of the plastic part facing away from the circuit board in the first direction. The guide portion is used to guide the electronic device to move along the first direction.

[0007] In some embodiments of this application, the main body extends along a second direction and has a first end and a second end opposite to each other in the second direction. The metal part also includes a guide structure. The guide structure is disposed near the first end, and the connecting structure is disposed near the second end. The guide structure includes a third connecting portion and a guide arm, which are respectively connected to opposite sides of the main body in the first direction. The third connecting portion is used for connection with a circuit board, and the guide portion wraps around the outer periphery of the guide arm.

[0008] In some embodiments of this application, a first anchoring structure is provided on the guide arm, and a plastic part is at least partially filled within or encapsulates the first anchoring structure. And / or, the plastic part is injection molded to the outer periphery of the main body, and a second anchoring structure is provided on the main body, with the plastic part at least partially filled within or encapsulating the second anchoring structure.

[0009] In some embodiments of this application, the second connecting portion is provided with a snap-fit ​​portion, which is used for snap-fit ​​connection with electronic devices.

[0010] In some embodiments of this application, the first connecting portion is an elastic pressing structure. The elastic pressing structure is configured to undergo elastic deformation and thus have an interference fit with the pressing hole of the circuit board.

[0011] According to a second aspect of this application, an electrical connection device is provided. The electrical connection device includes a circuit board, electronic components, and a pre-fixed structure as described above. A first adapter portion is provided on the circuit board, and a second adapter portion is provided on the electronic components. A first connecting portion of the pre-fixed structure mates with the first adapter portion, and a second connecting portion mates with the second adapter portion.

[0012] In some embodiments of this application, a first positioning portion is provided on the plastic part, and a second positioning portion is provided on the circuit board. The first positioning portion and the second positioning portion are connected to restrict the relative movement of the plastic part and the circuit board in a direction parallel to the first plate surface.

[0013] In some embodiments of this application, the electronic device has pre-fixed structures on both opposite sides of a third direction. The third direction is perpendicular to the first direction.

[0014] In some embodiments of this application, the plastic part further includes a guide portion. Both the guide portion and the second connecting portion are located on the side of the plastic part facing away from the circuit board and are spaced apart in a second direction. In two opposing pre-fixing structures, the orthographic projection area of ​​the second connecting portion of one pre-fixing structure in a third direction at least partially overlaps with the orthographic projection area of ​​the guide portion of the other pre-fixing structure in a third direction. The first direction, the second direction, and the third direction are perpendicular to each other.

[0015] In some embodiments of this application, the electronic device has a first sidewall and a second sidewall disposed opposite to each other in a third direction. A first receiving groove is provided on the first sidewall and recessed toward the second sidewall, and at least a portion of the pre-fixed structure is received in the first receiving groove.

[0016] In some embodiments of this application, the circuit board has a second surface. The second surface and the first surface are disposed opposite each other in a first direction. Electronic devices are disposed on the first surface. The electrical connection device further includes a fastening assembly that passes through the circuit board and is fixedly connected to the electronic devices.

[0017] In some embodiments of this application, the circuit board has a second surface. The second surface and the first surface are disposed opposite to each other in a first direction. Multiple electronic devices are present. At least one electronic device is fixed to the first surface by a pre-fixing structure, and at least another electronic device is fixed to the second surface by another pre-fixing structure.

[0018] In some embodiments of this application, a first positioning portion is provided on the plastic part. A second positioning portion is provided on the circuit board. The first positioning portion and the second positioning portion are connected. The length of the first positioning portion in a first direction is less than the thickness of the circuit board in the first direction.

[0019] In the pre-fixed structure of this application embodiment, through the integral molding structure of the metal and plastic parts, and the design of the first connecting part connecting to the circuit board and the second connecting part detachably connecting to the electronic device, the pre-fixed structure possesses both the stable positioning capability provided by the plastic part and the good connection performance of the metal connecting part. At the same time, the pre-fixed structure is reusable, which helps reduce usage costs and maintenance difficulty.

[0020] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0023] Figure 1 This is a schematic diagram of the overall structure of an electrical connection device provided in an exemplary embodiment of this application; Figure 2This is a perspective view of the pre-fixed structure provided in an exemplary embodiment of this application; Figure 3 This is one of the structural schematic diagrams of the metal parts in the pre-fixed structure provided in the exemplary embodiments of this application; Figure 4 This is the second schematic diagram of the metal component in the pre-fixed structure provided in the exemplary embodiment of this application; Figure 5 This is a side view of the metal component in the pre-fixed structure provided in an exemplary embodiment of this application; Figure 6 yes Figure 1 An enlarged schematic diagram of part A in the middle; Figure 7 yes Figure 1 A perspective view of the circuit board in the illustrated embodiment; Figure 8 yes Figure 1 A perspective view of the electronic components in the illustrated embodiment; Figure 9 This is a perspective view of an electrical connection device provided in an exemplary embodiment of this application; Figure 10 yes Figure 9 Top view of the electrical connection device in the illustrated embodiment; Figure 11 yes Figure 10 Cross-sectional view of section BB in the middle; Figure 12 This is a schematic diagram of the overall structure of another electrical connection device provided in an exemplary embodiment of this application; Figure 13 yes Figure 1 A bottom view of the electrical connection device in the illustrated embodiment; Figure 14 This is one of the overall structural schematic diagrams of another electrical connection device provided in the exemplary embodiments of this application; Figure 15 This is another schematic diagram of the overall structure of an electrical connection device provided in an exemplary embodiment of this application; Figure 16 yes Figure 12 The illustrated embodiment shows a schematic diagram of a pre-fixed structure mounted on a circuit board.

[0024] Explanation of reference numerals in the attached figures: 10-Metal component; 11-Main body; 111-First end; 112-Second end; 113-Second anchoring structure; 114-Straight section; 115-Bent section; 12-Connecting structure; 121-First connecting part; 122-Second connecting part; 1221-Snap-fit ​​part; 1222-Extension section; 1223-Inclined section; 13-Guide structure; 131-Third connecting part; 132-Guide arm; 1321-First anchoring structure; 20 - Plastic part; 21 - First positioning part; 22 - Guide part; 23 - First end face; 24 - Second end face; 30 - Electronic component; 31 - Second adapter; 32 - First sidewall; 321 - First receiving groove; 3211 - First groove segment; 3212 - Second groove segment; 3213 - Third groove segment; 322 - Retaining wall; 33 - Second sidewall; 331 - Second receiving groove; 40 - Circuit board; 41 - First board surface; 42 - Second board surface; 43 - First adapter part; 44 - Second positioning part; 50 - Fastening components; Z - First direction; Y - Second direction; X - Third direction. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0026] The following is for reference. Figures 1 to 16 This application describes the pre-fixed structure and electrical connection device provided in the embodiments.

[0027] According to the first aspect of this application, Figure 1 , Figure 2 and Figure 3 As shown, this application provides a pre-fixing structure for pre-fixing electronic devices 30 to circuit boards 40. The pre-fixing structure includes a metal part 10 and a plastic part 20.

[0028] The metal part 10 includes a main body 11 and a connecting structure 12. The connecting structure 12 includes a first connecting part 121 and a second connecting part 122. The first connecting part 121 and the second connecting part 122 are respectively connected to opposite sides of the main body 11 in the first direction Z.

[0029] The plastic part 20 is integrally formed with the main body 11. Both the first connecting part 121 and the second connecting part 122 extend to the outside of the plastic part 20. The first direction Z is perpendicular to the first surface 41 of the circuit board 40. The first connecting part 121 is used to connect to the circuit board 40. The second connecting part 122 is used for detachable connection to the electronic device 30.

[0030] Based on the above structure, the main body 11 of the metal part 10 serves as the core support, and the first connecting part 121 and the second connecting part 122 extend from the main body 11 to both sides. After the plastic part 20 is integrally formed with the main body 11, the first connecting part 121 and the second connecting part 122 are exposed outside the plastic part 20. This structure allows the first connecting part 121 to directly contact and connect with the circuit board 40. At the same time, the second connecting part 122 can directly contact and connect with the electronic device 30. The first connecting part 121 is connected to the circuit board 40, and when the pre-fixed structure is installed on the circuit board 40, the pre-fixed structure can be set on the circuit board 40 as a long-term fixed structure. The second connecting part 122 is used for detachable connection with the electronic device 30. When the electronic device 30 malfunctions or needs to be upgraded or replaced, the operator can remove the old electronic device 30 from the pre-fixed structure and then replace it with a new electronic device 30 and reconnect it to the second connecting part 122. During the entire electronic device replacement process, the pre-fixed structure itself does not need to be removed from the circuit board 40 and can continue to be used. Therefore, the pre-fixed structure serves as a long-term fixed structure on the circuit board 40, and does not need to be disassembled when the electronic device 30 is replaced. This allows the pre-fixed structure to be reused, which helps to reduce usage costs and maintenance difficulties.

[0031] The plastic part 20 provides support and positioning for the main body 11. Since neither the first connecting part 121 nor the second connecting part 122 is enclosed by the plastic part 20, they can freely undergo elastic deformation or cooperate with other components. Therefore, the pre-fixed structure possesses both the stable positioning capability provided by the plastic part 20 and the good connection performance of the metal part 10 connecting part.

[0032] The integral molding method of the plastic part 20 and the main body 11 can be any one of injection molding, embedding molding, or overmolding. During injection molding, the metal part 10 is placed in the mold, and then molten plastic material is injected. After the plastic material solidifies, it forms an integral piece with the metal part 10. This integral molding method ensures the bonding strength between the plastic part 20 and the metal part 10.

[0033] The number of connecting structures 12 can be one or more. When multiple connecting structures 12 are provided, they can be arranged at intervals along the extension direction of the main body 11. This arrangement can provide multiple connection points, making the connection between the pre-fixed structure and the circuit board 40 and electronic devices 30 more stable.

[0034] Please continue to refer to Figure 2 and Figure 3 A first positioning portion 21 is provided on the plastic part 20. Both the first positioning portion 21 and the first connecting portion 121 are located on the side of the plastic part 20 facing the circuit board 40 in the first direction Z. The first positioning portion 21 is used to mate with the circuit board 40. This mate connection is used to limit the relative movement of the plastic part 20 and the circuit board 40 in a direction parallel to the first board surface 41.

[0035] Therefore, when the pre-fixed structure is installed onto the circuit board 40, both the first positioning part 21 and the first connecting part 121 engage with the circuit board 40 from the same direction (i.e., the side facing the circuit board 40). The connection between the first connecting part 121 and the circuit board 40 primarily restricts the movement of the pre-fixed structure in the first direction Z. The engagement between the first positioning part 21 and the circuit board 40 restricts the movement of the pre-fixed structure in the direction parallel to the board surface. When the pre-fixed structure is subjected to a lateral force, the first positioning part 21 bears the lateral force and transmits it to the circuit board 40, allowing the first connecting part 121 to focus on bearing the pull-out force in the first direction Z. This functional division makes the force on the pre-fixed structure more balanced in both directions, which helps to reduce the stress burden on the first connecting part 121. Therefore, the overall positional stability of the pre-fixed structure on the circuit board 40 is improved, and the pre-fixed structure is less prone to displacement even under vibration or lateral impact.

[0036] As one possible implementation, the protrusion length of the first positioning part 21 along the first direction Z can be set to be greater than or equal to the protrusion length of the first connecting part 121 along the first direction Z. When the pre-fixed structure moves towards the circuit board 40 along the first direction Z, the first positioning part 21 contacts the circuit board 40 before the first connecting part 121, or the first positioning part 21 and the first connecting part 121 contact the circuit board 40 simultaneously. Since the position of the pre-fixed structure has been fixed by the first positioning part 21, the positional offset of the first connecting part 121 is reduced. Therefore, the first connecting part 121 can reach the preset connection position more accurately. The installation accuracy of the pre-fixed structure is improved.

[0037] Wherein, the protruding length of the first positioning part 21 along the first direction Z is the size of the first positioning part 21 protruding from the lower surface of the plastic part 20 (the side surface facing the circuit board 40) along the first direction Z, and the protruding length of the first connecting part 121 along the first direction Z is the size of the first connecting part 121 protruding from the lower surface of the plastic part 20 along the first direction Z.

[0038] Please continue to refer to Figure 2In this embodiment, the plastic component 20 further includes a guide portion 22. Both the guide portion 22 and the second connecting portion 122 are located on the side of the plastic component 20 facing away from the circuit board 40 in the first direction Z. The guide portion 22 is used to guide the electronic device 30 to move along the first direction Z.

[0039] Based on this structure, when the electronic device 30 is installed along the first direction Z, it first contacts the guide portion 22. The guide portion 22 guides the electronic device 30 to move along a predetermined trajectory, thereby improving the alignment accuracy between the second connecting portion 122 and the second adapter portion 31. Therefore, the positional deviation of the electronic device 30 during installation is reduced, and the smoothness of installation and the reliability of connection are improved.

[0040] As one possible implementation, the protrusion length of the guide portion 22 along the first direction Z is greater than or equal to the protrusion length of the second connecting portion 122 along the first direction Z. Here, the protrusion length of the guide portion 22 along the first direction Z refers to the dimension by which the guide portion 22 protrudes beyond the upper surface of the plastic part 20 (the side facing away from the circuit board 40). The protrusion length of the second connecting portion 122 along the first direction Z refers to the dimension by which the second connecting portion 122 protrudes beyond the upper surface of the plastic part 20.

[0041] When the protruding length of the guide portion 22 is greater than the protruding length of the second connecting portion 122, the end of the guide portion 22 is further away from the plastic part 20 than the end of the second connecting portion 122. When the electronic device 30 is mounted along the first direction Z, the electronic device 30 first contacts the guide portion 22 and then contacts the second connecting portion 122.

[0042] When the protruding length of the guide portion 22 is equal to the protruding length of the second connecting portion 122, the end of the guide portion 22 is flush with the end of the second connecting portion 122. The electronic device 30 simultaneously contacts the guide portion 22 and the second connecting portion 122.

[0043] Therefore, the guide portion 22 provides guidance before or simultaneously with the connection between the second connecting portion 122 and the electronic device 30, which helps to reduce the lateral forces and friction experienced by the second connecting portion 122 during the installation of the electronic device 30. At the same time, the guidance provided by the guide portion 22 reduces the lateral impact of the electronic device 30 on the second connecting portion 122. The second connecting portion 122 can then provide a locking and retaining force after the electronic device 30 is in place, without needing to simultaneously perform a guiding function during installation.

[0044] The number of guide portions 22 can be one or more. When multiple guide portions 22 are provided, they can be arranged at intervals along the extension direction of the main body 11. Multiple guide portions 22 can guide the electronic device 30 from multiple positions, making the installation process of the electronic device 30 smoother.

[0045] As one feasible approach, the guide portion 22 and the sidewall of the electronic device 30 are in surface contact. Surface contact increases the contact area, making the installation process of the electronic device 30 more stable.

[0046] As one feasible approach, at least one of the first positioning part 21 and the guide part 22 is integrally formed with the plastic part 20. This integral structure can be completed in one step through injection molding or insert molding processes, reducing subsequent assembly steps and improving the manufacturing efficiency of the pre-fixed structure. Simultaneously, the integral structure eliminates the need for additional adhesives or fasteners, thus reducing manufacturing costs. Furthermore, the integral structure will not loosen under repeated impacts or long-term vibrations. Therefore, the long-term stability of the positioning and guiding functions is guaranteed.

[0047] In one possible manner, the plastic part 20 is disposed on the outer periphery of the main body 11 and completely covers the main body 11. In some embodiments, the plastic part 20 includes at least a portion of the root of the second connecting portion 122 (i.e., the portion connected to the main body 11), at least a portion of the root of the first connecting portion 121, and at least a portion of the root of the third connecting portion 131.

[0048] To more clearly illustrate the specific construction and spatial orientation of the pre-fixed structure, it is defined that the pre-fixed structure has three mutually orthogonal directions: the first direction Z, the second direction Y, and the third direction X. It should be noted that "perpendicular" here includes both perfect perpendicularity in a geometric sense and a basically perpendicular state that can achieve essentially the same technical effect within the tolerances allowed in this field.

[0049] Please continue to refer to Figure 2 and Figure 3 The main body 11 extends along the second direction Y. The main body 11 has a first end 111 and a second end 112 opposite each other in the second direction Y. The metal part 10 also includes a guide structure 13. The guide structure 13 is disposed near the first end 111. The connecting structure 12 is disposed near the second end 112. The guide structure 13 includes a third connecting portion 131 and a guide arm 132. The third connecting portion 131 and the guide arm 132 are respectively connected to opposite sides of the main body 11 in the first direction Z. The third connecting portion 131 is used for connection with the circuit board 40. The guide portion 22 wraps around the outer periphery of the guide arm 132. The second direction Y is perpendicular to the first direction Z.

[0050] Based on this structure, on the one hand, the guide portion 22 is wrapped around the outer periphery of the guide arm 132, and the guide arm 132 provides a metal skeleton support for the guide portion 22. When the guide portion 22 is subjected to pressure or friction from the electronic device 30, the guide arm 132 can bear part of the load, which helps to avoid excessive elastic or plastic deformation of the guide portion 22, so that the shape and size of the guide portion 22 can be maintained, and the guiding accuracy is relatively good over long-term use.

[0051] On the other hand, the third connecting portion 131 is located below the guide arm 132, adjacent to the connection area between the guide arm 132 and the main body 11. When the guide portion 22 is subjected to a lateral force, the lateral force is transmitted from the guide portion 22 to the guide arm 132. A portion of the lateral force is transmitted to the main body 11 through the root of the guide arm 132. Another portion of the lateral force is directly transmitted to the circuit board 40 through the third connecting portion 131. Thus, the bending moment that was originally borne solely by the root of the guide arm 132 is distributed to be borne jointly by the root of the guide arm 132 and the third connecting portion 131. The bending moment at the root of the guide arm 132 is reduced, and the bending deformation of the guide arm 132 is correspondingly reduced.

[0052] Specifically, the first connecting portion 121 is disposed directly below the second connecting portion 122, and the third connecting portion 131 is disposed directly below the guide arm 132. Alternatively, the orthographic projection area of ​​the first connecting portion 121 in the first direction Z at least partially overlaps with the orthographic projection area of ​​the second connecting portion 122 in the first direction Z, and the orthographic projection area of ​​the third connecting portion 131 in the first direction Z at least partially overlaps with the orthographic projection area of ​​the guide arm 132 in the first direction Z.

[0053] like Figure 4 As shown, in one possible implementation, the main body 11 is generally plate-shaped. The main body 11 includes at least two straight sections 114 and at least one bent section 115 connecting the two straight sections 114. The bent section 115 forms a bent plate-like structure for the main body 11. Compared to a straight plate structure, the bent structure has higher bending stiffness at the same material thickness. When the second connecting portion 122 is subjected to a clamping force, the main body 11 is less prone to bending or twisting, and the installation posture of the first connecting portion 121 and the third connecting portion 131 remains stable. Therefore, it is beneficial to improve the overall structural strength of the pre-fixed structure.

[0054] As an example, the first connecting part 121 and the third connecting part 131 can have the same structural form, that is, they have the same shape, size, and elastic deformation characteristics. This allows the first connecting part 121 and the third connecting part 131 to be formed using the same stamping die or the same processing technology, reducing the number of dies and process steps in the manufacturing process of the metal part 10. When both adopt the same structural form, they can use the same installation process, eliminating the need to prepare different installation tools or set different installation parameters for the first connecting part 121 and the third connecting part 131, thus reducing the complexity of the installation process, shortening the installation time, and improving installation efficiency.

[0055] like Figure 3 and Figure 4 As shown, a first anchoring structure 1321 is provided on the guide arm 132, and the plastic part 20 is at least partially filled within or encloses the first anchoring structure 1321. In some other embodiments, a second anchoring structure 113 is provided on the main body 11, and the plastic part 20 is at least partially filled within or encloses the second anchoring structure 113. In still other embodiments, the first anchoring structure 1321 is provided on the guide arm 132, and the second anchoring structure 113 is provided on the main body 11.

[0056] The first anchoring structure 1321 enhances the bond strength between the guide arm 132 and the plastic part 20. During injection molding, molten plastic material flows into or surrounds the first anchoring structure 1321. After curing, a mechanical interlock is formed between the plastic part 20 and the guide arm 132. When the guide part 22 is subjected to external force, this mechanical interlock structure resists relative movement between the plastic part 20 and the guide arm 132.

[0057] Similarly, the second anchoring structure 113 helps to enhance the bonding strength between the main body 11 and the plastic part 20.

[0058] As one possible implementation, the first anchoring structure 1321 can be a through hole, blind hole, groove, or channel formed on the guide arm 132. The first anchoring structure 1321 can also be a protrusion, barb, or knurling provided on the outer surface of the guide arm 132. The first anchoring structure 1321 can also be a combination of various forms of holes, channels, protrusions, barbs, or knurling.

[0059] The type of the second anchoring structure 113 is similar to that of the first anchoring structure 1321, and can be one or more combinations of holes, grooves, protrusions, barbs or knurling, which will not be described in detail here.

[0060] In some embodiments, a snap-fit ​​portion 1221 is provided on the second connecting portion 122. The snap-fit ​​portion 1221 is used to snap-fit ​​with the electronic device 30. When the electronic device 30 is installed along the first direction Z toward the circuit board 40, the electronic device 30 forces the second connecting portion 122 to undergo elastic deformation. When the electronic device 30 moves to the predetermined installation position, the second connecting portion 122 elastically returns to its original position, and the snap-fit ​​portion 1221 snaps into the electronic device 30, forming an interlock, which has higher stability and impact resistance. Therefore, the reliability of the temporary holding of the electronic device 30 before final fixation is improved. Even if the circuit board 40 is flipped or subjected to vibration during transportation, the electronic device 30 is not easy to fall off, providing a stable assembly foundation for the subsequent final fixation operation, and the assembly efficiency and yield rate are correspondingly improved.

[0061] like Figure 5 and Figure 6 As shown, in some embodiments, the second connecting portion 122 extends upward from the main body portion 11, and the second connecting portion 122 includes an extension section 1222 and an inclined section 1223. The extension section 1222 extends along a first direction Z and connects the main body portion 11 and the inclined section 1223. The inclined section 1223 is inclined relative to the extension section 1222, and the inclined section 1223 gradually moves away from the electronic device 30 in a direction away from the circuit board 40. In other words, when viewed from the end closer to the circuit board 40 to the end farther away from the circuit board 40, the distance between the inclined section 1223 and the electronic device 30 gradually increases.

[0062] Because the inclined section 1223 is tilted away from the electronic device 30, the sidewall of the electronic device 30 exerts an outward pushing force on the inclined section 1223. This pushing force causes the inclined section 1223 to open outward, while simultaneously causing the extension section 1222 to undergo elastic deformation. The tilting direction of the inclined section 1223 makes the contact between the electronic device 30 and the second connecting part 122 a gradually transitioning sliding contact. The electronic device 30 slides along the outer surface of the inclined section 1223, pushing the second connecting part 122 to gradually open, which helps to reduce the impact force on the second connecting part 122 during installation and makes the installation more stable.

[0063] The elastic structure of the second connecting part 122 supports multiple disassembly and repair of the electronic component 30. When the electronic component 30 needs to be replaced, the operator can cause the second connecting part 122 to elastically deform and remove the electronic component 30; when installing a new electronic component 30, the second connecting part 122 elastically deforms again and returns to its original position, forming a snap-fit ​​connection with the new electronic component 30. This elastic structure can withstand multiple disassembly and assembly operations, which helps ensure the availability of the pre-fixed structure during multiple replacements of the electronic component 30.

[0064] According to a second aspect of this application, an electrical connection device is provided, such as... Figure 1 , Figure 7 and Figure 8 As shown, the electrical connection device includes a circuit board 40, an electronic component 30, and a pre-fixed structure as described in any of the foregoing embodiments. A first adapter 43 is provided on the circuit board 40. The first adapter 43 is used to connect with the first connecting portion 121 of the pre-fixed structure. A second adapter 31 is provided on the electronic component 30. The second adapter 31 is used to connect with the second connecting portion 122 of the pre-fixed structure. This electrical connection device has all the beneficial effects of the aforementioned pre-fixed structure, which will not be elaborated further here. For example, the electronic component 30 can be a connector.

[0065] The pre-fixing structure and the electronic component 30 are separate components. The pre-fixing structure can temporarily hold the electronic component 30 in a predetermined position on the circuit board 40. During the subsequent final fixing process (such as screw tightening), the operator can flip the circuit board 40 without worrying about the electronic component 30 falling off, reducing assembly difficulty and improving assembly efficiency.

[0066] In actual production, the pre-fixed structure can be batch-pressed onto the circuit board 40 via the first connecting part 121 to complete the installation. Then, at a subsequent workstation or production line, the electronic components 30 are installed onto the pre-fixed structure via the second connecting part 122. These two steps can be performed independently without interference.

[0067] In a maintenance scenario, when electronic component 30 is damaged and needs replacement, the operator can disassemble the connection structure between the second connecting part 122 and electronic component 30 without touching the connection between the first connecting part 121 and circuit board 40. This means that the maintenance operation will not affect the stable connection already established between the pre-fixed structure and circuit board 40, nor will it require secondary crimping or soldering of circuit board 40, which helps to reduce the difficulty of maintenance operations and improve maintenance efficiency.

[0068] As one possible approach, the specific form of the first adapter 43 matches the connection method of the first connector 121. When the first connector 121 is an elastic crimping structure, the first adapter 43 can be a crimping hole formed on the circuit board 40. The inner diameter of the crimping hole is slightly smaller than the maximum outer diameter of the first connector 121, forming an interference fit. The elastic crimping structure is configured to interlock with the crimping hole of the circuit board 40 after elastic deformation. This structure requires no soldering; after being pressed into the crimping hole by a crimping tool, it relies on the restoring force generated by its own elastic deformation to provide holding force. This helps to avoid soldering heat damage, improve installation efficiency, enable detachable and reusable operation, adapt to manufacturing tolerances, ensure long-term electrical reliability, and simplify material management.

[0069] In other words, when electronic component 30 needs to be replaced, the operator only needs to operate on the second connection part 122. The circuit board 40 and its crimp holes will not be subjected to repeated mechanical action due to multiple replacements of electronic component 30. This helps reduce potential damage to the circuit board 40 during maintenance, such as wear, deformation of the crimp holes, or detachment of solder pads, and helps protect the integrity and reliability of the circuit board 40.

[0070] For example, the elastic compression structure can be a fisheye structure, which includes a hollow or slotted elastic body, roughly shaped like a fisheye. Other examples include star-shaped, C-shaped, or spiral elastic structures.

[0071] As one possible approach, the first connecting part 121 is provided with an external thread, and the first adapter part 43 can be a threaded hole opened on the circuit board 40. The internal thread of the threaded hole matches the external thread of the first connecting part 121, and the two are connected by thread engagement.

[0072] Alternatively, the first connecting portion 121 can be a permanent magnet, and the first adapter portion 43 can be a magnetically conductive material layer or a permanent magnet disposed on the circuit board 40. The magnetically conductive material layer can be made of iron, nickel, or their alloys. The permanent magnet has the opposite polarity to the permanent magnet of the first connecting portion 121.

[0073] In some embodiments of this application, when the second connecting part 122 is provided with a snap-fit ​​part 1221 and the snap-fit ​​part 1221 is a snap-fit ​​hole, the second adapter part 31 can be a snap-fit ​​step provided on the electronic device 30.

[0074] As an example, the snap-fit ​​portion 1221 is a snap hook protruding toward the electronic device 30, and the second adapter portion 31 is a snap-fit ​​groove formed on the electronic device 30.

[0075] As an example, the locking portion 1221 consists of a plurality of one-way ratchet teeth disposed on the second connecting portion 122, and the second adapter portion 31 consists of a resilient pawl disposed on the electronic device 30. The ratchet teeth and pawl cooperate to provide one-way locking.

[0076] Please refer to Figure 2 and Figure 7 A first positioning part 21 is provided on the plastic part 20. A second positioning part 44 is provided on the circuit board 40. The first positioning part 21 and the second positioning part 44 are connected to each other to restrict the relative movement of the plastic part 20 and the circuit board 40 in a direction parallel to the first plate surface 41.

[0077] When the pre-fixed structure is subjected to a lateral force, the cooperation between the first positioning part 21 and the second positioning part 44 resists the lateral force, preventing the pre-fixed structure from shifting or rotating in the horizontal direction. The first positioning part 21 and the second positioning part 44 are detachably connected. When maintenance or replacement of the pre-fixed structure is required, the operator can pull the pre-fixed structure upwards, causing the first positioning part 21 to detach from the second positioning part 44 without causing structural damage. The pre-fixed structure can be reused, reducing maintenance costs.

[0078] As an example, the first positioning part 21 is a positioning post, and the second positioning part 44 is a positioning hole formed on the circuit board 40. The positioning post is disposed on the end face (first end face 23) of the plastic part 20 facing the circuit board 40, located on the outer periphery of the first connecting part 121. The positioning post protrudes along the first direction Z, and the cross-sectional shape of the positioning post can be any one of a circle, square, ellipse or cross shape.

[0079] When the pre-fixed structure is installed onto the circuit board 40 along the first direction Z, the positioning post is inserted into the positioning hole. The wall of the positioning hole provides a horizontal limit to the positioning post, restricting the movement of the pre-fixed structure in a direction parallel to the first plate surface 41. As an optional feature, the end of the positioning post may be provided with a guide chamfer. The guide chamfer provides guidance when the positioning post is inserted into the positioning hole, reducing insertion resistance.

[0080] As an example, the first positioning part 21 is a positioning protrusion, and the second positioning part 44 is a positioning groove formed on the circuit board 40. The positioning protrusion is provided on the side of the plastic part 20 facing the circuit board 40. The positioning groove is formed on the first surface 41 of the circuit board 40. When the pre-fixed structure is installed on the circuit board 40, the positioning protrusion is embedded in the positioning groove, and the sidewall of the positioning groove forms a horizontal limit on the positioning protrusion.

[0081] As an example, the first positioning part 21 is a positioning hook, and the second positioning part 44 is a positioning slot formed on the circuit board 40.

[0082] As an example, the first positioning part 21 is a positioning groove, and the second positioning part 44 is a positioning boss provided on the circuit board 40. The positioning groove is formed on the side of the plastic part 20 facing the circuit board 40. The positioning boss is provided on the first surface 41 of the circuit board 40. When the pre-fixed structure is installed on the circuit board 40, the positioning boss is embedded in the positioning groove, and the sidewall of the positioning groove forms a horizontal limit on the positioning boss.

[0083] As an example, the first positioning part 21 and the plastic part 20 are integrally molded. This integral molding structure ensures the connection strength between the first positioning part 21 and the plastic part 20, preventing the first positioning part 21 from loosening or falling off during use. The plastic material has good molding precision and wear resistance, and the positioning accuracy does not decrease significantly after repeated insertion and removal.

[0084] like Figure 1 and Figure 9 As shown, the electronic device 30 has pre-fixed structures on both opposite sides in the third direction X. In other words, an installation space for mounting the electronic device 30 is formed between the two pre-fixed structures. During installation, the two pre-fixed structures can simultaneously clamp or position the electronic device 30 from both sides, which helps to avoid assembly gaps and shaking of the electronic device 30 in the third direction X, and prevents it from shifting or tilting in the early stages of installation. This improves the installation accuracy of the electronic device 30 on the circuit board 40 or other carriers, ensuring product consistency.

[0085] Furthermore, when the electronic device 30 is subjected to external mechanical stress (such as vibration during transportation or vibration during equipment operation), this double-sided pre-fixing method can disperse the external impact force to two stress points, which is beneficial to improving the firmness of the connection between the electronic device 30 and the circuit board 40 and the reliability of the overall structure.

[0086] In a specific application scenario, to further clarify the spatial correspondence between the first direction Z, the second direction Y, and the third direction X, an example can be given based on the geometric features of the circuit board 40 itself. For instance, when the second direction Y is defined as the width direction of the circuit board 40, the third direction X is correspondingly defined as the length direction of the circuit board 40. Conversely, if the second direction Y is set as the length direction of the circuit board 40, then the third direction X is the width direction of the circuit board 40.

[0087] Please refer to the above as well. Figure 3 and Figure 10 In this embodiment, the main body 11 extends along the second direction Y. The guide portion 22 and the second connecting portion 122 of the plastic part 20 are both located on the side of the plastic part 20 facing away from the circuit board 40, and are spaced apart in the second direction Y. The two pre-fixed structures are arranged opposite to each other, and the orthographic projection area of ​​the second connecting portion 122 of one pre-fixed structure in the third direction X at least partially overlaps with the orthographic projection area of ​​the guide portion 22 of the other pre-fixed structure in the third direction X.

[0088] In the third direction X, the second connecting part 122 and the guide part 22 occupy the same space interval. If their projection areas are completely offset, the two pre-fixed structures would require a larger overall size in the third direction X. The overlap of the projection areas reduces the total length of the two pre-fixed structures in the third direction X, and reduces the overall space occupied by the two pre-fixed structures on the circuit board 40. This is beneficial for arranging more electronic devices 30 in a limited space and increasing the layout density of the circuit board 40.

[0089] Furthermore, since the projection areas of the second connecting part 122 and the guide part 22 of the two pre-fixed structures coincide in the third direction X, the constraint points on both sides of the electronic device 30 are in approximately the same position. The displacement of the electronic device 30 is simultaneously restricted by the constraint points on both sides, which helps to reduce the torsional tendency of the electronic device 30 under vibration environment and makes the posture of the electronic device 30 more stable.

[0090] Specifically, the orthographic projection area of ​​the left guide portion 22 in the third direction X at least partially overlaps with the orthographic projection area of ​​the right second connecting portion 122 in the third direction X, and vice versa. In other words, the guide portion 22 of the left pre-fixed structure and the second connecting portion 122 of the right pre-fixed structure are located at approximately the same position in the second direction Y.

[0091] The upper left corner of the electronic device 30 is affected by the combined action of the left guide portion 22 and the right second connecting portion 122. The upper right corner of the electronic device 30 is affected by the combined action of the right guide portion 22 and the left second connecting portion 122. This helps to ensure that the electronic device 30 does not tilt or deflect during installation, resulting in greater stability and improved installation accuracy.

[0092] If the two guide parts 22 are arranged on the same side (as on the left side) and the two second connecting parts 122 are arranged on the other side (as on the right side), the electronic device 30 is subjected to two guiding forces on one side and two engaging forces on the other side, and the electronic device 30 may be twisted.

[0093] The diagonal arrangement makes the two pre-fixed structures structurally complementary. The guide portion 22 of the left pre-fixed structure is aligned with the second connecting portion 122 of the right pre-fixed structure in the second direction Y. Only one mold is needed for manufacturing. During assembly, one pre-fixed structure is rotated 180 degrees and installed on the other side of the electronic device 30, achieving the diagonal arrangement, simplifying manufacturing and assembly processes, and reducing costs.

[0094] Please refer to Figure 8 and Figure 9 In some embodiments of this application, the electronic device 30 has a first sidewall 32 and a second sidewall 33 disposed opposite each other in a third direction X. At least the first sidewall 32 is provided with a first receiving groove 321 recessed toward the second sidewall 33. At least a portion of the pre-fixed structure is received within the first receiving groove 321.

[0095] A first receiving groove 321 is disposed on the first sidewall 32 of the electronic device 30 and recessed towards the second sidewall 33. A pre-fixing structure is housed within the first receiving groove 321, embedding itself into the internal space of the electronic device 30. In other words, the pre-fixing structure utilizes the internal space of the electronic device 30's own contour, essentially not increasing the projected area of ​​the electronic device 30 on the circuit board 40. More electronic devices 30 can be arranged on the circuit board 40, increasing the arrangement density.

[0096] Furthermore, the pre-fixed structure is housed within the first receiving groove 321 and protected by the first sidewall 32 of the electronic device 30. When the electrical connection device is subjected to external impact, the first sidewall 32 of the electronic device 30 bears the impact force first, and the pre-fixed structure is less susceptible to impact damage, thus improving its impact resistance and reliability.

[0097] like Figures 9 to 12 As shown, the maximum dimension of the pre-fixed structure in the third direction X is less than or equal to the depth of the first receiving groove 321. When viewed from the vertical direction (i.e., the first direction Z) of the circuit board 40, the projected outline of the electronic device 30 is defined by the outer edges of the first sidewall 32 and the second sidewall 33. The pre-fixed structure does not protrude from the first sidewall 32, and the pre-fixed structure is completely within the projected outline of the electronic device 30, with the outermost point of the pre-fixed structure not exceeding the outer surface of the first sidewall 32. Therefore, the area of ​​the circuit board 40 occupied by the electronic device 30 does not increase due to the installation of the pre-fixed structure.

[0098] With the above structure, adjacent electronic components 30 can be placed closer together without interference caused by the protrusion of the pre-fixed structure. During installation, the spacing between adjacent electronic components 30 only needs to consider the size of the electronic components 30 themselves and their heat dissipation requirements, without needing to consider the protrusion of the pre-fixed structure. This allows more electronic components 30 to be arranged on the circuit board 40, further improving the layout density.

[0099] As an example, a plurality of first receiving slots 321 may be provided on the first sidewall 32. The plurality of first receiving slots 321 are arranged at intervals along the second direction Y. A pre-fixing structure is housed within one of the first receiving slots 321, providing multi-point fixation, thereby further improving the pre-fixing reliability of the electronic device 30.

[0100] Please continue to refer to Figure 8 and Figure 9 In some embodiments of this application, the first receiving groove 321 includes a first groove segment 3211, a second groove segment 3212, and a third groove segment 3213. The first groove segment 3211 extends through one end of the first sidewall 32 near the circuit board 40. The second groove segment 3212 and the third groove segment 3213 are both connected to the side of the first groove segment 3211 away from the circuit board 40, and the second groove segment 3212 and the third groove segment 3213 are spaced apart in the second direction Y. The plastic part 20 is received in the first groove segment 3211. The second connecting part 122 is received in the second groove segment 3212. The guide arm 132 is received in the third groove segment 3213.

[0101] The first receiving groove 321 is divided into three functional areas: a first groove segment 3211, a second groove segment 3212, and a third groove segment 3213. The first groove segment 3211 extends through the end of the first sidewall 32 near the circuit board 40, providing an installation entry for the plastic component 20. The plastic component 20 is inserted into the first groove segment 3211 from the bottom of the first sidewall 32 upwards, making the installation path simple and direct.

[0102] The second slot segment 3212 and the third slot segment 3213 extend from the side of the first slot segment 3211 away from the circuit board 40 and are spaced apart in the second direction Y. This branching structure allows the second connecting part 122 and the guide arm 132 to be housed in different slot segments, achieving spatial separation of the functional structure.

[0103] Therefore, the segmented structure of the first receiving slot 321 is conducive to realizing the phased installation of the pre-fixed structure, the spatial separation of functional components, the guidance of the installation process, the guarantee of functional independence, and the precise positioning of the pre-fixed structure, thereby improving assembly efficiency, assembly accuracy and connection reliability.

[0104] like Figure 8 and Figure 9As shown, in some embodiments of this application, a first receiving groove 321 is provided on the first sidewall 32, and a second receiving groove 331 is provided on the second sidewall 33. The two pre-fixed structures are respectively housed within the first receiving groove 321 and the second receiving groove 331, forming a bilaterally symmetrical arrangement. The second receiving groove 331 can adopt the same structure as the first receiving groove 321, which will not be described further here.

[0105] Please refer to Figure 1 and Figure 2 In some embodiments of this application, the plastic component 20 has a first end face 23 and a second end face 24. The first end face 23 is located on the side of the plastic component 20 facing the circuit board 40. The second end face 24 is located on the side of the plastic component 20 facing away from the circuit board 40.

[0106] When the plastic part 20 is mounted onto the circuit board 40, the first end face 23 abuts against the first surface 41 of the circuit board 40, forming a clear installation termination position. As the pre-fixed structure is pressed into the circuit board 40 along the first direction Z, the first end face 23 gradually approaches the first surface 41. When the first end face 23 abuts against the first surface 41, the pre-fixed structure cannot continue to move downwards, thus preventing the pre-fixed structure from being excessively pressed into the circuit board 40.

[0107] After the first end face 23 abuts against the first plate surface 41, the pressing depth of the first connecting part 121 is precisely controlled. The elastic deformation of the first connecting part 121 remains within the design range, ensuring that it will not suffer from insufficient holding force due to excessive pressing or plastic deformation due to excessive pressing. Therefore, the reliability of the connection between the first connecting part 121 and the circuit board 40 is guaranteed.

[0108] When multiple pre-fixed structures are mounted on the same circuit board 40, the first end face 23 of each pre-fixed structure abuts against the first board surface 41, ensuring that the mounting height of each pre-fixed structure on the circuit board 40 remains consistent. This helps ensure that the second connecting portion 122 and the guide portion 22 of each pre-fixed structure are at the same height when the electronic device 30 is installed. The electronic device 30 can simultaneously cooperate with multiple pre-fixed structures without experiencing unilateral force or installation difficulties due to height deviations.

[0109] Please refer to Figure 2 , Figure 8 and Figure 9 In some embodiments, the first sidewall 32 further has a baffle 322 located between the second slot segment 3212 and the third slot segment 3213, the baffle 322 separating the second slot segment 3212 and the third slot segment 3213 in the second direction Y. When the electronic device 30 is mounted to the circuit board 40, the second end face 24 of the plastic part 20 abuts against the end face of the baffle 322 facing the circuit board 40.

[0110] When the electronic device 30 is installed downwards along the first direction Z, the electronic device 30 moves the first sidewall 32 downwards together. The baffle 322, as part of the first sidewall 32, moves downwards synchronously with the electronic device 30. The end face of the baffle 322 gradually approaches the second end face 24 of the plastic part 20. When the end face of the baffle 322 contacts the second end face 24 of the plastic part 20, the downward movement of the electronic device 30 is stopped, limiting its downward displacement during installation. Thus, the downward displacement of the electronic device 30 is precisely limited within a predetermined range, and the elastic deformation of the second connecting portion 122 is controlled within the design value, preventing excessive deformation.

[0111] Please refer to the above as well. Figure 9 and Figure 13 In some embodiments of this application, the circuit board 40 has a second surface 42. The second surface 42 and the first surface 41 are disposed opposite each other in a first direction Z. The electronic device 30 is disposed on the first surface 41. The electrical connection device further includes a fastening assembly 50. The fastening assembly 50 passes through the circuit board 40 and is fixedly connected to the electronic device 30.

[0112] The pre-fixing structure temporarily holds the electronic component 30 on the first surface 41 of the circuit board 40. After the pre-fixing structure is installed, the electronic component 30 is fixed in the predetermined position. The operator can flip the circuit board 40 so that the second surface 42 faces upward. The fastening assembly 50 passes through the circuit board 40 from the second surface 42 side and forms a fixed connection with the electronic component 30. This step-by-step installation method of pre-fixing followed by final fixing allows the final fixing operation to be performed in the convenient position after the circuit board 40 is flipped, reducing assembly difficulty.

[0113] Without a pre-fixing structure, the operator would need to hold the electronic component 30 down by hand while flipping the circuit board 40 to prevent it from falling off. This not only increases the difficulty of operation but may also cause the electronic component 30 to shift or fall off during the flipping process. The pre-fixing structure securely holds the electronic component 30 to the first board surface 41, preventing it from falling off even when the circuit board 40 is flipped, thus improving the safety and reliability of the assembly process.

[0114] The fastening assembly 50 passes through the circuit board 40 and is fixedly connected to the electronic device 30, providing the final connection holding force. The pre-fixing structure still exists between the electronic device 30 and the circuit board 40 after final fixing. The first connecting portion 121 of the pre-fixing structure remains connected to the crimp hole of the circuit board 40, and the second connecting portion 122 remains engaged with the second adapter portion 31 of the electronic device 30. The pre-fixing structure can serve as an auxiliary fixing structure, sharing part of the load of the fastening assembly 50.

[0115] As an example, the fastening assembly 50 may include a screw and a washer. The screw passes through a through-hole in the circuit board 40 and is screwed into a threaded hole in the electronic device 30. The washer is disposed between the screw head and the second surface 42 of the circuit board 40 to prevent loosening and distribute pressure evenly.

[0116] As an example, fastening assembly 50 may include rivets. After the rivets pass through circuit board 40 and electronics 30, a permanent connection is formed through a riveting process. This connection method is suitable for scenarios where disassembly is not required and offers high connection strength.

[0117] When repairing or replacing electronic component 30, the operator can first disassemble the fastening assembly 50. Then, a separation force is applied to disengage the snap-fit ​​portion 1221 of the pre-fixed structure from the second adapter portion 31 of the electronic component 30. The electronic component 30 can then be removed from the circuit board 40. The pre-fixed structure remains on the circuit board 40 and can be reused, thereby reducing maintenance costs.

[0118] like Figure 14 and Figure 15 As shown, in some embodiments of this application, the circuit board 40 has a second surface 42. The second surface 42 and the first surface 41 are disposed opposite each other in a first direction Z. Multiple electronic devices 30 are included. At least one electronic device 30 is fixed to the first surface 41 by a pre-fixing structure. At least another electronic device 30 is fixed to the second surface 42 by another pre-fixing structure.

[0119] Multiple electronic devices 30 are respectively disposed on the first surface 41 and the second surface 42 of the circuit board 40. This double-sided mounting structure utilizes the area on both sides of the circuit board 40. Compared with a scheme that mounts electronic devices 30 on only one side, double-sided mounting increases the number of electronic devices 30 that can be arranged on the circuit board 40. With the size of the circuit board 40 remaining unchanged, it is beneficial to improve the layout density.

[0120] The pre-fixed structure temporarily holds the electronic components 30 on their respective target board surfaces. When the operator flips the circuit board 40 to assemble the other side, the already installed electronic components 30 will not fall off the circuit board 40, realizing automated double-sided assembly of the circuit board 40 and improving assembly efficiency.

[0121] In some embodiments of this application, a first positioning portion 21 is provided on the plastic part 20. A second positioning portion 44 is provided on the circuit board 40. The first positioning portion 21 and the second positioning portion 44 are connected to each other. The length of the first positioning portion 21 in the first direction Z is less than the thickness of the circuit board 40 in the first direction Z.

[0122] The length of the first positioning part 21 is less than the thickness of the circuit board 40. For example, when the first positioning part 21, which is disposed on the pre-fixed structure of the first plate surface 41, is inserted into the second positioning part 44, the end of the first positioning part 21 will not protrude from the second plate surface 42 of the circuit board 40. The first positioning part 21 is completely contained within the thickness range of the circuit board 40 and does not protrude from the second plate surface 42.

[0123] In applications requiring double-sided mounting of electronic components 30, the protruding first positioning part 21 may interfere with pre-fixed structures or electronic components 30 on the second board surface 42. The length of the first positioning part 21 is less than the thickness of the circuit board 40, which helps to avoid this interference.

[0124] As one feasible approach, when pre-fixing structures are provided on both the first board surface 41 and the second board surface 42, the first positioning parts 21 of the two pre-fixing structures are inserted into the second positioning parts 44 of the circuit board 40 from the first board surface 41 side and the second board surface 42 side, respectively. The length of each first positioning part 21 is less than or equal to half the thickness of the circuit board 40, so that the first positioning parts 21 of the two pre-fixing structures do not interfere with each other inside the circuit board 40. During double-sided mounting, the first positioning part 21 of each pre-fixing structure can be independently pressed into a predetermined depth, and there will be no misalignment or internal stress caused by the first positioning parts 21 abutting against each other, which helps to ensure the feasibility of double-sided mounting.

[0125] This application exemplarily describes the installation process of the electrical connection device, which mainly includes the steps of installing the pre-fixed structure to the circuit board 40 and installing the electronic device 30 to the pre-fixed structure.

[0126] like Figure 2 , Figure 7 and Figure 16 As shown, the steps for mounting the pre-fixed structure to the circuit board 40 include: First, the pre-fixed structure is installed onto the circuit board 40. The operator or automated equipment picks up the pre-fixed structure, aligns the first connecting part 121 with the crimp hole on the circuit board 40, and simultaneously aligns the first positioning part 21 with the second positioning part 44.

[0127] Then, pressure is applied downward along the first direction Z. The first positioning part 21 first enters the second positioning part 44 to correct the horizontal position of the pre-fixed structure. The first connecting part 121 simultaneously or subsequently enters the crimping hole, and the first connecting part 121 elastically contracts.

[0128] Continue applying pressure until the first end face 23 of the plastic part 20 abuts against the first surface 41 of the circuit board 40. At this point, the first connecting part 121 is fully pressed into the crimp hole, and after elastic recovery, it forms an interference fit with the crimp hole. The first positioning part 21 is fully inserted into the second positioning part 44. The pre-fixed structure is fixed to the first surface 41 of the circuit board 40.

[0129] Repeat the above steps to install another pre-fixed structure to another predetermined position on the first surface 41 of the circuit board 40, or to the second surface 42 of the circuit board 40.

[0130] The installation of electronic device 30 into the pre-fixed structure specifically includes: like Figure 8 , Figure 12 and Figure 16 As shown, electronic device 30 is installed onto the pre-fixed structure. An operator or automated equipment picks up electronic device 30 and aligns the second adapter 31 of electronic device 30 with the second connecting part 122 of the pre-fixed structure, while simultaneously aligning the guide groove (such as the third groove segment 3213) of electronic device 30 with the guide part 22.

[0131] The electronic device 30 moves downward along the first direction Z. The sidewall of the electronic device 30 first contacts the guide portion 22. The guide portion 22 guides the electronic device 30 to move along a predetermined trajectory, so that the second adapter portion 31 and the second connecting portion 122 cooperate and connect.

[0132] The electronic device 30 continues to move downwards. The second adapter 31 contacts the snap-fit ​​portion 1221 of the second connecting portion 122. The second connecting portion 122 undergoes elastic deformation and opens outwards. The electronic device 30 continues to move downwards until the second adapter 31 snaps into contact with the snap-fit ​​portion 1221.

[0133] At this time, the second connecting part 122 elastically returns to its original position, and the snap-fit ​​part 1221 and the second adapter part 31 form a snap-fit ​​connection. Simultaneously, the second end face 24 of the plastic part 20 abuts against the end face of the retaining wall 322 on the side wall of the electronic device 30, restricting further downward movement of the electronic device 30. The electronic device 30 is pre-fixed to the circuit board 40.

[0134] When electronic device 30 also needs to be installed on the second surface 42 of circuit board 40, flip circuit board 40 and repeat the above steps to install another electronic device 30 onto the pre-fixed structure on the second surface 42.

[0135] Finally, secure the electronic component 30. An operator or automated equipment flips the circuit board 40 (if necessary) so that the second surface 42 faces upwards. Take a fastening component 50, such as a screw, and pass it through a through-hole in the circuit board 40. Tighten the screw until its threads engage with a threaded hole in the electronic component 30.

[0136] In the description of this application, "first direction Z" refers to the direction perpendicular to the first surface 41 of the circuit board 40. This direction is also the pressing direction for the pre-fixed structure to be mounted to the circuit board 40, and the mounting direction for the electronic device 30 to be mounted to the circuit board 40.

[0137] 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 technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0138] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0139] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0140] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A pre-fixed structure, characterized in that, The pre-fixing structure is used to pre-fix electronic components to the circuit board, and the pre-fixing structure includes: A metal part includes a main body and a connecting structure; the connecting structure includes a first connecting part and a second connecting part, the first connecting part and the second connecting part being respectively connected to opposite sides of the main body in a first direction; A plastic part is integrally formed with the main body; both the first connecting part and the second connecting part extend to the outside of the plastic part; the first connecting part is used to connect with the circuit board, and the second connecting part is used to detachably connect with the electronic device; Wherein, the first direction is perpendicular to the first surface of the circuit board.

2. The pre-fixed structure according to claim 1, characterized in that, The plastic part is provided with a first positioning part, and the first positioning part and the first connecting part are both located on the side of the plastic part facing the circuit board in the first direction; the first positioning part is used to cooperate with the circuit board to restrict the relative movement of the plastic part and the circuit board in a direction parallel to the first board surface.

3. The pre-fixed structure according to claim 1, characterized in that, The plastic part further includes a guide portion, and the guide portion and the second connecting portion are both located on the side of the plastic part opposite to the circuit board in the first direction; the guide portion is used to guide the electronic device to move along the first direction.

4. The pre-fixed structure according to claim 3, characterized in that, The main body extends along a second direction and has a first end and a second end opposite to each other in the second direction; The metal component further includes a guide structure, which is disposed near the first end, and the connecting structure is disposed near the second end; the guide structure includes a third connecting portion and a guide arm, which are respectively connected to opposite sides of the main body in a first direction; the third connecting portion is used to connect with the circuit board, and the guide portion wraps around the outer periphery of the guide arm; The second direction is perpendicular to the first direction.

5. The pre-fixed structure according to claim 4, characterized in that, The guide arm is provided with a first anchoring structure, and the plastic part is at least partially filled in or wrapped within the first anchoring structure. And / or, The plastic part is injection molded to the outer periphery of the main body; a second anchoring structure is provided on the main body, and the plastic part is at least partially filled in or encloses the second anchoring structure.

6. The pre-fixed structure according to claim 1, characterized in that, The second connecting part is provided with a snap-fit ​​part, which is used to snap-fit ​​and connect with the electronic device.

7. The pre-fixed structure according to claim 1, characterized in that, The first connecting part is an elastic pressing structure, which is configured to make an interference fit with the pressing hole of the circuit board after elastic deformation.

8. An electrical connection device, characterized in that, The electrical connection device includes: A circuit board having a first adapter portion; An electronic device, wherein a second adapter is provided on the electronic device; The pre-fixed structure as described in any one of claims 1 to 7; the first connecting part is connected to the first adapter part; the second connecting part is connected to the second adapter part.

9. The electrical connection device according to claim 8, characterized in that, The plastic part is provided with a first positioning part; the circuit board is provided with a second positioning part, and the first positioning part and the second positioning part are connected to restrict the relative movement of the plastic part and the circuit board in a direction parallel to the first board surface.

10. The electrical connection device according to claim 8, characterized in that, The electronic device has the pre-fixed structure on both sides of the third direction, which is perpendicular to the first direction.

11. The electrical connection device according to claim 10, characterized in that, The plastic part further includes a guide portion, and the guide portion and the second connecting portion are both located on the side of the plastic part facing away from the circuit board, and are spaced apart in the second direction; In two pre-fixed structures arranged opposite to each other, the second connecting part of one pre-fixed structure in the orthographic projection area of ​​the third direction at least partially overlaps with the guide part of the other pre-fixed structure in the orthographic projection area of ​​the third direction; Wherein, the first direction, the second direction, and the third direction are perpendicular to each other.

12. The electrical connection device according to claim 10 or 11, characterized in that, The electronic device has a first sidewall and a second sidewall disposed opposite to each other in the third direction; a first receiving groove is provided on the first sidewall and recessed toward the second sidewall, and at least a portion of the pre-fixed structure is received in the first receiving groove.

13. The electrical connection device according to claim 8, characterized in that, The circuit board has a second surface, which is disposed opposite to the first surface in the first direction; the electronic device is disposed on the first surface; the electrical connection device further includes a fastening component, which passes through the circuit board and is fixedly connected to the electronic device.

14. The electrical connection device according to claim 8, characterized in that, The circuit board has a second plate surface, which is disposed opposite to the first plate surface in the first direction; there are multiple electronic devices, at least one of which is fixed to the first plate surface by the pre-fixing structure, and at least another electronic device is fixed to the second plate surface by another pre-fixing structure.

15. The electrical connection device according to claim 14, characterized in that, The plastic part is provided with a first positioning part; the circuit board is provided with a second positioning part, the first positioning part and the second positioning part are connected, and the length of the first positioning part in the first direction is less than the thickness of the circuit board in the first direction.

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