Board-to-board connection terminal and electronic equipment
By designing a board-to-board connection terminal with an adjustment section and a connection section featuring spiral grooves, the problem of unstable connection caused by circuit board displacement was solved, achieving stable electrical connection and improving the reliability of electronic equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG HRV ELECTRIC CO LTD
- Filing Date
- 2025-04-01
- Publication Date
- 2026-04-17
AI Technical Summary
Existing board-to-board connection structures cannot effectively cope with displacement changes between circuit boards, resulting in unstable connections and affecting the performance and lifespan of electronic devices.
Design a board-to-board connection terminal, including an adjustment part and a connection part. The adjustment part has a spiral groove, which has elastic deformation capability and can compensate for the displacement between the circuit boards. The circuit boards are fixed by a locking member to maintain a stable electrical connection.
It achieves stable electrical connections between circuit boards, reduces contact resistance and signal transmission loss, improves connection reliability and stability, reduces installation costs, and is suitable for high-density and miniaturized electronic devices.
Smart Images
Figure CN224138358U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of electronic equipment technology, and more specifically, to a board-to-board connection terminal. It also relates to an electronic device including the aforementioned board-to-board connection terminal. Background Technology
[0002] With the development of new energy technologies, electronic devices are gradually becoming smaller, more integrated, and with higher power density. The connection methods between electronic components in electronic devices are also constantly being improved.
[0003] Board-to-board (BPC) connections are a common way to achieve electrical and mechanical connections between circuit boards in electronic devices. They connect the circuit boards to form a whole and maintain electrical contact. BPC connection technology is particularly suitable for scenarios that require high density, high reliability, and miniaturization. It is a common connection method between electronic components.
[0004] However, due to factors such as assembly tolerances, differences in thermal expansion coefficients, vibration and shock, the predetermined connection position between the two circuit boards may shift, resulting in unstable connection between the circuit boards or even breakage. The circuit boards cannot maintain stable electrical contact, which affects the performance and lifespan of electronic equipment.
[0005] The existing plate-to-plate connection structure cannot cope with the various displacement changes mentioned above, resulting in unstable connections. Utility Model Content
[0006] This application provides a board-to-board connection terminal that can effectively compensate for displacement between circuit boards and ensure the stability of electrical contact.
[0007] This application provides a board-to-board connection terminal, including a terminal body, the terminal body comprising:
[0008] The adjustment part has an inner hole that extends through the adjustment part along a first direction. The outer wall of the adjustment part has a spiral groove. The spiral groove is spirally arranged along the circumference of the adjustment part and the first direction, and is connected to the inner hole.
[0009] A first connecting portion is disposed at a first end of the adjusting portion along the first direction, and the first connecting portion is used to connect to a first circuit board;
[0010] The second connecting part is disposed at the second end of the adjusting part along the first direction, and the second connecting part is used to connect the second circuit board.
[0011] In some embodiments, a locking element is also included;
[0012] The first connecting part has a locking hole and a first positioning surface on the side facing the first circuit board. The first positioning surface is arranged around the locking hole and is used to position the first circuit board. The locking member is used to lock the first circuit board to the locking hole.
[0013] In some embodiments, a second positioning surface is provided on the side of the second connecting portion facing the second circuit board, and the second positioning surface is provided with a plug-in portion. The second positioning surface is used to position the second circuit board, and the plug-in portion is used to be inserted into the plug-in hole of the second circuit board.
[0014] In some embodiments, the end face of the plug portion protrudes from the second positioning surface along the first direction.
[0015] In some embodiments, the adjusting portion extends along the first direction and toward the first circuit board to form the first connecting portion, and the adjusting portion extends along the first direction and toward the second circuit board to form the second connecting portion, and the inner hole, the locking hole and the plug-in portion are coaxially arranged.
[0016] In some embodiments, along the first direction, the length of the adjusting portion is greater than the lengths of the first connecting portion and the second connecting portion.
[0017] In some embodiments, along the first direction, the length of the adjustment portion is one-quarter to one-half of the total length of the terminal body.
[0018] In some embodiments, the second connecting portion is provided with a through first hole, which communicates with the inner hole.
[0019] In some embodiments, the number of spiral grooves is 1 to 3, the lead of the spiral grooves ranges from 3 mm to 10 mm, and the groove width of the spiral grooves is from 1 mm to 2 mm.
[0020] This application also provides an electronic device, including a first circuit board and a second circuit board, and further including a connection terminal, wherein the connection terminal is a board-to-board connection terminal of the above embodiment, and the connection terminal is used to connect the first circuit board and the second circuit board.
[0021] The board-to-board connection terminal provided in this application has an adjusting part with an inner hole along the circumferential direction and the connection direction of the circuit board, and a spiral groove arranged spirally along the circumferential direction and the connection direction on the outer wall surface. It has the ability to elastically deform and can effectively compensate for displacement in different directions. The adjusting part can compensate for the relative displacement between the circuit boards. The first connecting part and the second connecting part are respectively fixedly connected to the first circuit board and the second circuit board, while maintaining a stable electrical connection. This application achieves this goal by designing a floating connection terminal structure with an elastic terminal body. The elastic terminal body can generate elastic deformation under displacement, thereby absorbing and compensating for inter-board displacement and ensuring the stability of electrical contact. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0023] Figure 1 This is a schematic diagram of the structure of the board-to-board connection terminal provided in some embodiments of this application;
[0024] Figure 2 A half-sectional schematic diagram of a board-to-board connection terminal provided in some embodiments of this application;
[0025] Figure 3 An exploded view of a board-to-board connection terminal and a first circuit board and a second circuit board provided in some embodiments of this application;
[0026] Figure 4 This is a schematic diagram of the assembly of the board-to-board connection terminal with the first circuit board and the second circuit board, provided for other embodiments of this application.
[0027] The attached figures are labeled as follows:
[0028] 1-Terminal body; 2-First circuit board; 3-Second circuit board; 4-Locking component;
[0029] 11-Adjustment section; 12-First connection section; 13-Second connection section; 21-Through hole; 31-Pad;
[0030] 111-Inner hole; 112-Helical groove; 121-Locking hole; 121a-First positioning surface; 122-Second through hole; 131-Insertion part; 131a-Second positioning surface; 132-First through hole;
[0031] X - First direction. Detailed Implementation
[0032] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0033] Due to limitations in circuit board manufacturing processes and assembly tolerances, circuit boards cannot be perfectly aligned, resulting in slight displacement. Furthermore, even if assembly precision is maintained, temperature changes during electronic device use can cause different circuit board materials to deform differently due to their varying coefficients of thermal expansion, leading to loose connections. In addition, electronic devices are susceptible to vibration and shock during use, which can also cause poor contact at connection terminals.
[0034] Therefore, all of the above factors can lead to unstable connection resistance between circuit boards, or even connection breakage, affecting the performance and lifespan of electronic devices.
[0035] Therefore, the board-to-board connection terminals provided in this application are capable of adaptive floating to compensate for displacement and maintain a stable electrical connection between boards.
[0036] The embodiments of this application will now be described with reference to the accompanying drawings.
[0037] Please refer to Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of the board-to-board connection terminal provided in some embodiments of this application; Figure 2 This is a half-sectional view of the board-to-board connection terminals provided in some embodiments of this application.
[0038] This application provides a board-to-board connection terminal, including a terminal body 1. The terminal body 1 includes an adjustment part 11, a first connecting part 12, and a second connecting part 13. The adjustment part 11 has an inner hole 111 inside, which extends through the adjustment part 11 along a first direction X. The outer wall surface of the adjustment part 11 has a spiral groove 112, which is spirally arranged along the circumferential direction and the first direction X on the outer peripheral surface of the adjustment part 11 and extends from the outer peripheral surface to the inner hole 111. The spiral groove 112 communicates with the inner hole 111.
[0039] The first connecting part 12 is disposed at the first end of the adjusting part 11 along the first direction X. The first connecting part 12 can be directly connected to the first circuit board 2 by means of welding, plugging, snapping, threaded connection, etc., or it can be indirectly connected to the first circuit board 2 through the locking part 4.
[0040] The second connecting part 13 is disposed at the second end of the adjusting part 11 along the first direction X. The second connecting part 13 can be directly connected to the second circuit board 3 by means of welding, plugging, snapping, threaded connection, etc., or it can be indirectly connected to the second circuit board 3 through the locking part 4.
[0041] The working principle of this application is as follows: the adjusting part 11 has an inner hole 111 inside and a threaded groove communicating with the inner hole 111 outside, so that the terminal body 1 as a whole has a certain elasticity and buffering capacity. When the connection position between the circuit boards is misaligned, the adjusting part 11 undergoes elastic deformation between the boards to compensate for the displacement between the boards, thereby adaptively compensating for the positional change between the two circuit boards, so as to maintain electrical contact between the circuit boards.
[0042] In one specific embodiment, the board-to-board connection terminal further includes a locking member 4, which connects the first circuit board 2 and the first end of the terminal body 1. Specifically, the side of the first connecting portion 12 facing the first circuit board 2 is provided with a locking hole 121 and a first positioning surface 121a. The first positioning surface 121a is arranged around the locking hole 121. Optionally, the locking hole 121 is a threaded hole and is located in the middle of the first positioning surface 121a. When connecting the first circuit board 2, the first positioning surface 121a serves to position the first circuit board 2, and the locking member 4 passes through the locking hole 121 of the first circuit board 2 and the terminal body 1 to lock and fix it.
[0043] Regarding the connection method between the second circuit board 3 and the terminal body 1, in one specific embodiment, a second positioning surface 131a is provided on the side of the second connecting part 13 facing the second circuit board 3, and a plug-in part 131 is provided on the second positioning surface 131a. The plug-in part 131 is located in the middle of the second positioning surface 131a. When installing the second circuit board 3, it is positioned by the second positioning surface 131a, and then the plug-in part 131 is inserted into the plug-in hole of the second circuit board 3. Finally, the pins of the terminal body 1 are soldered.
[0044] In other words, when installing the board-to-board connection terminals, the terminal body 1 is soldered onto the second circuit board 3, the first circuit board 2 is aligned with the terminal body 1, and screws are screwed in to tighten it. When the terminal body 1 is displaced between the circuit boards, it will undergo slight elastic deformation to absorb the displacement, and the connection force can be adjusted by locking components such as screws 4.
[0045] Specifically, the fixed terminal is fixedly mounted on the second circuit board 3, and the terminal body 1 is mounted on the first circuit board 2, allowing for relative floating. The terminal body 1 and the circuit board can be electrically connected through elastic contacts, sliding contact surfaces, etc.
[0046] The terminal body 1 can be made of conductive metal, such as brass. One end of the terminal body 1 is provided with a first positioning surface 121a and a locking hole 121, and the other end is provided with a second positioning surface 131a and a plug-in part 131. The bottom is provided with soldering pins.
[0047] like Figure 3 As shown. During installation, firstly, the welding pins of the second connecting part 13 of the terminal body 1 are soldered onto the pads 31 of the second circuit board 3 to achieve electrical connection and initial fixation. Then, the metallized via 21 of the first circuit board 2 is aligned with the locking hole 121 of the terminal body 1, and the locking member 4 is screwed into the locking hole 121 to securely connect the first circuit board 2 and the terminal body 1. The locking member 4 provides stable mechanical support, thereby achieving mechanical and electrical connection between the first circuit board 2 and the second circuit board 3.
[0048] It should be noted that the circuit board in this application can be a PCB (Printed Circuit Board), an FPC (Flexible Printed Circuit), a metal substrate, a ceramic circuit board, a winding board, etc.
[0049] To ensure the accuracy of the installation between the terminal body 1 and the second circuit board 3, the end face of the plug-in part 131 protrudes from the second positioning surface 131a along the first direction X. In this way, the plug-in part 131 can be used to insert and pre-position first, and then the second positioning surface 131a can be used for positioning. The connection is then welded and fixed, thereby improving assembly efficiency and assembly accuracy.
[0050] In one specific embodiment, the adjusting portion 11 extends along the first direction X and toward the first circuit board 2 to form a first connecting portion 12, and the adjusting portion 11 extends along the first direction X and toward the second circuit board 3 to form a second connecting portion 13. This design makes the terminal body 1 form an integral structure, which can ensure connection strength and facilitate processing.
[0051] Furthermore, the inner hole 111 of the adjustment part 11, the locking hole 121 of the first connecting part 12, and the insertion part 131 of the second connecting part 13 are coaxially arranged to ensure the accuracy of the connection.
[0052] In one specific embodiment, along the first direction X, the length of the adjusting part 11 is greater than the lengths of the first connecting part 12 and the second connecting part 13, thereby ensuring that the terminal body 1 has sufficient adjusting length and a larger adjusting range.
[0053] Optionally, along the first direction X, the length of the adjusting part 11 is between one-quarter and one-half of the total length of the terminal body 1. Furthermore, the length of the adjusting part 11 can be set according to actual needs, and is not limited herein.
[0054] Optionally, the number of spiral grooves 112 is 1 to 3, and the spiral grooves 112 are evenly distributed circumferentially. The lead of the spiral grooves 112 ranges from 3 mm to 10 mm, and the groove width of the spiral grooves 112 is from 1 mm to 2 mm.
[0055] With the diameter of the adjusting part 11 remaining constant, the smaller the lead of the spiral groove 112, the smaller the bending stiffness and axial stiffness of the adjusting part 11, and the stronger its deformation adjustment capability. Conversely, as the lead of the spiral groove 112 increases, the bending stiffness and axial stiffness of the adjusting part 11 gradually increase, and the deformation adjustment capability gradually decreases. Furthermore, the narrower the groove width of the spiral groove 112, the greater the bending stiffness and axial stiffness of the adjusting part 11, and the weaker its deformation adjustment capability. Conversely, the wider the groove width of the spiral groove 112, the smaller the bending stiffness and axial stiffness of the adjusting part 11, and the stronger its deformation adjustment capability.
[0056] Experiments showed that when the lead of the spiral groove 112 is less than 3mm and the groove width is greater than 2mm, the spacing of the spiral grooves 112 is too close and the groove width is too large. This results in insufficient bending and axial stiffness of the adjusting part 11, leading to inadequate support and an inability to provide effective support. When the lead of the spiral groove 112 is greater than 10mm and the groove width is less than 1mm, the spacing of the spiral grooves 112 is too sparse, resulting in poor deformation adjustment capability of the adjusting part 11 and an inability to effectively adjust the displacement between circuit boards. Therefore, when the lead of the spiral groove 112 is within the range of 3mm to 10mm and the groove width is within the range of 1mm to 2mm, it can both compensate for positional deviations between circuit boards and provide good support, resulting in a better connection effect.
[0057] Furthermore, the second connecting portion 13 has a first through hole 132 inside. This first through hole 132 extends through the second connecting portion 13 along the first direction X, i.e., the thickness direction, and is coaxially distributed with and connected to the inner hole 111. This design achieves a reduction in the thickness of the second connecting portion 13, further reducing its rigidity, and even increasing the flexible deformable space and the floating adjustment length.
[0058] Furthermore, a second through hole 122 is provided inside the first connecting portion 12. The second through hole 122 extends through the first connecting portion 12 along the first direction X, that is, the thickness direction. The second through hole 122 is coaxially distributed with the inner hole 111 and the first through hole 132, and is sequentially connected to the inner hole 111 and the first through hole 132. This design achieves the thinning of the first connecting portion 12, further reducing the hardness of the first connecting portion 12, and even increasing the flexible deformable space, thereby increasing the floating adjustment length.
[0059] The board-to-board connection terminals provided in this application have a floating adaptability and a connection mechanism that can effectively compensate for displacement, effectively relieving mechanical stress, ensuring stable and reliable electrical contact of the circuit board, reducing contact resistance and signal transmission loss at electrical connection points, and improving the reliability and stability of the connection. Furthermore, this application has a compact structure, occupies little space, is easy to install, and is readily implemented, improving production efficiency and reducing installation costs, making it suitable for power electronic equipment with high space requirements.
[0060] like Figure 4 As shown. Secondly, embodiments of this application provide an electronic device, including a first circuit board 2 and a second circuit board 3, and further including the aforementioned board-to-board connection terminals, which connect the first circuit board 2 and the second circuit board 3. The number of board-to-board connection terminals can be one, two, or more, and they are simultaneously connected between the first circuit board 2 and the second circuit board 3.
[0061] It should be noted that the electronic device provided in this application embodiment has the beneficial effects of the board-to-board connection terminal in any of the foregoing embodiments. For details, please refer to the foregoing description of the beneficial effects of the board-to-board connection terminal, which will not be repeated in this application embodiment.
[0062] The board-to-board connection terminals and electronic devices provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the methods and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of this application.
Claims
1. A board-to-board connection terminal characterized by comprising: Includes a terminal body (1), the terminal body (1) comprising: The adjustment part (11) has an inner hole (111) that runs through the adjustment part (11) along a first direction. The outer wall surface of the adjustment part (11) is provided with a spiral groove (112). The spiral groove (112) is spirally arranged along the circumference of the adjustment part (11) and the first direction, and is connected to the inner hole (111). A first connecting part (12) is disposed at the first end of the adjusting part (11) along the first direction, and the first connecting part (12) is used to connect the first circuit board (2). The second connecting part (13) is disposed at the second end of the adjusting part (11) along the first direction, and the second connecting part (13) is used to connect the second circuit board (3).
2. The board-to-board connection terminal according to claim 1, characterized by It also includes locking components (4); The first connecting part (12) is provided with a locking hole (121) and a first positioning surface (121a) on the side facing the first circuit board (2). The first positioning surface (121a) is arranged around the locking hole (121) and is used to position the first circuit board (2). The locking member (4) is used to lock the first circuit board (2) and the locking hole (121).
3. The board-to-board connection terminal according to claim 2, characterized by The second connecting part (13) has a second positioning surface (131a) on the side facing the second circuit board (3). The second positioning surface (131a) has a plug-in part (131). The second positioning surface (131a) is used to position the second circuit board (3). The plug-in part (131) is used to be inserted into the plug-in hole of the second circuit board (3).
4. The board-to-board connection terminal according to claim 3, characterized by The insertion part (131) protrudes from the second positioning surface (131a) along the first direction.
5. The board-to-board connection terminal according to claim 3, characterized by The adjustment part (11) extends along the first direction and toward the first circuit board (2) to form the first connecting part (12), and the adjustment part (11) extends along the first direction and toward the second circuit board (3) to form the second connecting part (13). The inner hole (111), the locking hole (121) and the plug-in part (131) are coaxially arranged.
6. The board-to-board connection terminal according to any one of claims 1 to 5, characterized by Along the first direction, the length of the adjusting part (11) is greater than the lengths of the first connecting part (12) and the second connecting part (13).
7. The board-to-board connection terminal according to claim 6, characterized by Along the first direction, the length of the adjustment part (11) is one-quarter to one-half of the total length of the terminal body (1).
8. The board-to-board connection terminal according to any one of claims 1 to 5, characterized by The second connecting part (13) has a through hole (132) inside, which is connected to the inner hole (111).
9. The board-to-board connection terminal according to any one of claims 1 to 5, characterized by The number of spiral grooves (112) is 1 to 3, the lead of the spiral grooves (112) is 3 mm to 10 mm, and the groove width of the spiral grooves (112) is 1 mm to 2 mm.
10. An electronic device comprising a first circuit board (2) and a second circuit board (3), characterized in that It also includes a connection terminal, which is a board-to-board connection terminal as described in any one of claims 1 to 9, and the connection terminal is used to connect the first circuit board (2) and the second circuit board (3).