Board-to-board connection terminal and electronic device

Abstract

A board-to-board connecting terminal, characterized in that it comprises a terminal body (1), the terminal body (1) comprising: an adjustment section (11) in which an inner hole (111) is arranged, which passes through the adjustment section (11) in a first direction, wherein the outer wall surface of the adjustment section (11) is provided with a spiral groove (112) which is arranged spirally in the circumferential direction of the adjustment section (11) and in the first direction and is connected to the inner hole (111); a first connecting portion (12) arranged in the first direction at a first end of the adjustment portion (11) and serving to connect a first circuit board (2); and a second connecting portion (13) arranged at a second end of the adjustment portion (11) in the first direction and serving to connect a second circuit board (3).

Description

Technical area

[0001] The present utility model relates to the technical field of electronic devices, in particular to a board-to-board connection terminal. It further relates to an electronic device comprising the aforementioned board-to-board connection terminal. State of the art

[0002] With the development of new energy technologies, electronic devices are increasingly moving toward miniaturization, integration, and higher power density. At the same time, the connection methods between electronic components in electronic devices are also continuously improving.

[0003] Board-to-board interconnection is a common connection method in electronic devices that establishes the electrical and mechanical connection between printed circuit boards. The interconnection between the printed circuit boards creates a single unit and maintains electrical contact. This is particularly suitable for applications requiring high density, high reliability, and miniaturization. Board-to-board interconnection technology is a common connection method between electronic components.

[0004] However, factors such as assembly tolerances, differences in thermal expansion coefficients, vibrations, and shocks cause the specified connection positions between two printed circuit boards to deviate. This causes the connection between the printed circuit boards to become unstable or even broken, preventing stable electrical contact between the boards. This affects the performance and service life of electronic devices.

[0005] The existing board-to-board connection structures cannot withstand the various displacements mentioned above, resulting in unstable connections. Content of the utility model

[0006] The present utility model provides a board-to-board connecting terminal that can effectively compensate for displacements between printed circuit boards and ensure the stability of electrical contact.

[0007] The present utility model provides a board-to-board connecting terminal comprising a terminal body, the terminal body comprising: an adjustment portion in which an inner hole is arranged which passes through the adjustment portion in a first direction, wherein the outer wall surface of the adjustment portion is provided with a spiral groove which is arranged spirally in the circumferential direction of the adjustment portion and in the first direction and which communicates with the inner hole; a first connecting portion disposed in the first direction at a first end of the adjustment portion and serving to connect a first circuit board; and a second connecting portion disposed at a second end of the adjustment portion in the first direction and serving to connect a second circuit board.

[0008] In some embodiments, the board-to-board connection terminal further comprises a locking element.

[0009] A locking hole and a first positioning surface are arranged on the side of the first connecting portion facing the first circuit board, wherein the first positioning surface surrounds the locking hole and serves to position the first circuit board. The locking element serves to lock the first circuit board to the locking hole.

[0010] In some embodiments, a second positioning surface is arranged on the side of the second connecting section facing the second circuit board, wherein the second positioning surface is provided with a plug-in section. The second positioning surface serves to position the second circuit board. The plug-in section serves to insert into a plug-in hole of the second circuit board.

[0011] In some embodiments, the end surface of the plug-in portion located in the first direction projects beyond the second positioning surface.

[0012] In some embodiments, the adjustment portion extends in the first direction and toward the first circuit board to form the first connecting portion, and extends in the first direction and toward the second circuit board to form the second connecting portion, wherein the inner hole, the locking hole, and the plug-in portion are coaxially arranged.

[0013] In some embodiments, the length of the adjustment portion in the first direction is greater than the length of the first connecting portion and the second connecting portion.

[0014] In some embodiments, the length of the adjustment section in the first direction is one quarter to one half of the total length of the clamp body.

[0015] In some embodiments, a first through-hole is arranged in the second connecting portion. The first through-hole passes through the second connecting portion and communicates with the inner hole.

[0016] In some embodiments, the number of spiral grooves is 1 to 3. The pitch of the spiral groove is in the range of 3 mm to 10 mm and the groove width of the spiral groove is 1 mm to 2 mm.

[0017] The present utility model further provides an electronic device comprising a first circuit board and a second circuit board. The electronic device further comprises a connecting terminal, wherein the connecting terminal is the board-to-board connecting terminal according to the above-described embodiments and serves to connect the first circuit board and the second circuit board.

[0018] The board-to-board connecting terminal provided in the present utility model has an adjustment portion provided with an inner hole in the circumferential direction and in the connection direction of the printed circuit boards. The outer wall surface of the adjustment portion is provided with a spiral groove arranged helically in the circumferential direction and in the connection direction. The terminal has the ability to elastically deform and can effectively compensate for displacements in various directions. The adjustment portion can compensate for relative displacements between the printed circuit boards. The first connection portion and the second connection portion are firmly connected to the first printed circuit board and the second printed circuit board, respectively, while maintaining a stable electrical connection through the board-to-board connecting terminal.The present utility model achieves this goal by constructing a spring-loaded terminal body structure with a floating connection function. The elastic terminal body can generate elastic deformations under the action of displacement forces, thereby absorbing and compensating plate displacements to ensure the stability of the electrical contact. Description of the attached drawings

[0019] To more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the drawings required in the description of the embodiments or the prior art are briefly explained. Of course, the following drawings represent only embodiments of the present utility model. Those skilled in the art can derive further drawings from the provided figures without inventive activity. Fig. 1 is a schematic structural diagram of a board-to-board connection terminal according to some embodiments of the present utility model; Fig. 2 is a half-sectioned schematic diagram of the board-to-board connection terminal according to some embodiments of the present utility model; Fig. 3 is an exploded view of the board-to-board connector terminal with a first circuit board and a second circuit board according to some embodiments of the present invention; and Fig. 4 is an assembly view of the board-to-board connecting terminal with the first circuit board and the second circuit board according to further embodiments of the present utility model.

[0020] Reference symbols: 1-terminal body; 2-first circuit board; 3-second circuit board; 4-locking element; 11-Adjustment section; 12-First connection section; 13-Second connection section; 21-Through hole; 31-Solder pad; 111-inner hole; 112-spiral groove; 121-locking hole; 121a-first positioning surface; 122-second through hole; 131-plug-in portion; 131a-second positioning surface; 132-first through hole; and X-first direction. Examples of implementation

[0021] In order to clarify the objectives, technical solutions, and advantages of the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be described clearly below with reference to the accompanying drawings in the embodiments of the present utility model. It goes without saying that the described embodiments represent only a part of the embodiments of the present utility model and not all embodiments. Based on the embodiments of the present utility model, all other embodiments that can be obtained by those skilled in the art without creative work fall within the scope of the present utility model.

[0022] Due to limitations in PCB manufacturing technology and factors such as assembly tolerances, circuit boards cannot be perfectly aligned, resulting in slight misalignment. Even if assembly accuracy can be guaranteed, temperature fluctuations during operation of electronic devices lead to different deformations of circuit boards made of different materials due to their respective thermal expansion coefficients, causing loose connections. Furthermore, electronic devices are often subjected to vibration and shock during operation, which also leads to poor contact between the connecting terminals.

[0023] Consequently, the above factors may lead to unstable connection resistance between circuit boards or even connection interruptions, which will affect the performance and service life of electronic devices.

[0024] In view of this, the present utility model provides a board-to-board connection terminal with an adaptive floating function to compensate for displacements and maintain a stable electrical connection between the printed circuit boards.

[0025] In the following, the embodiments of the present utility model are explained with reference to the drawings.

[0026] Referring to Fig. 1 and Fig. 2 is Fig. 1 is a schematic structural diagram of a board-to-board connection terminal according to some embodiments of the present utility model; Fig. 2 is a half-sectioned schematic diagram of the board-to-board connection terminal according to some embodiments of the present utility model.

[0027] The present utility model provides a board-to-board connecting terminal comprising a terminal body 1, wherein the terminal body 1 has an adjustment portion 11, a first connecting portion 12, and a second connecting portion 13. An inner hole 111 is arranged in the adjustment portion 11 and extends through the adjustment portion 11 in the first direction X. The outer wall surface of the adjustment portion 11 has a spiral groove 112 that is arranged spirally in the circumferential direction and in the first direction X on the outer surface of the adjustment portion 11 and extends from the outer surface to the inner hole 111, wherein the spiral groove 112 communicates with the inner hole 111.

[0028] The first connecting portion 12 is arranged in the first direction X at a first end of the adjustment portion 11. The first connecting portion 12 can be connected directly to the first circuit board 2 by soldering, plugging, snap-in connection, or threaded connections, or indirectly connected to the first circuit board 2 via a locking element 4.

[0029] The second connecting portion 13 is arranged at a second end of the adjustment portion 11 in the first direction X. The second connecting portion 13 can be connected directly to the second circuit board 3 by soldering, plugging, snap-in connection, or threaded connections, or indirectly via a locking element 4 to the second circuit board 3.

[0030] The operating principle of the present utility model is as follows. The structure of the adjustment section 11, with the inner hole 111 located inside and the outer spiral groove 112 connected to the inner hole 111, imparts a certain degree of elasticity and cushioning to the terminal body 1 as a whole. When misalignments occur at the connection points between the printed circuit boards, the adjustment section 11 compensates for the board displacements through elastic deformation between the boards, thereby adapting and compensating for positional changes between the two printed circuit boards, thus maintaining electrical contact between the printed circuit boards.

[0031] In a specific embodiment, the board-to-board connecting terminal further comprises a locking element 4, wherein the first circuit board 2 is connected to the first end of the terminal body 1 via the locking element 4. Specifically, a locking hole 121 and a first positioning surface 121a are arranged on the side of the first connecting portion 12 facing the first circuit board 2, wherein the first positioning surface 121a surrounds the locking hole 121. Optionally, the locking hole 121 can be formed as a threaded bore and arranged in the center 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 element 4 is guided through the first circuit board 2 and the locking hole 121 of the terminal body 1 to establish a firm lock.

[0032] Regarding the connection between the second circuit board 3 and the terminal body 1, in a specific embodiment, a second positioning surface 131a is arranged on the side of the second connecting section 13 facing the second circuit board 3, wherein the second positioning surface 131a is provided with a plug-in section 131. The plug-in section 131 is arranged in the center of the second positioning surface 131a. During assembly of the second circuit board 3, the installation positioning takes place via the second positioning surface 131a, then the plug-in section 131 is inserted into a plug-in hole of the second circuit board 3, and finally, the connecting legs of the terminal body 1 are soldered.

[0033] In other words, when assembling the board-to-board connecting terminal, the terminal body 1 is soldered to the second circuit board 3, the first circuit board 2 is aligned with the terminal body 1, and a screw is tightened. When the terminal body 1 experiences displacement between the circuit boards, this results in slight elastic deformations that absorb the displacements, and the connection strength can be adjusted via the locking element 4 such as screws.

[0034] Specifically, the fixed terminal part is permanently installed on the second circuit board 3, while the terminal body 1 is mounted on the first circuit board 2 and allows relative movement. The electrical connection between the terminal body 1 and the circuit boards can be realized via elastic contacts, sliding contact surfaces, or similar.

[0035] The terminal body 1 can be made of a conductive metal such as brass. One end of the terminal body 1 has the first positioning surface 121a and the locking hole 121, the other end has the second positioning surface 131a and the plug-in portion 131, and the bottom side is provided with solder terminal legs.

[0036] As in Fig. As shown in Figure 3, during assembly, the solder terminal leg of the second connecting portion 13 of the terminal body 1 is first soldered to the solder pad 31 of the second circuit board 3, thereby achieving electrical connection and preliminary fixation. Subsequently, the metallized through-hole 21 of the first circuit board 2 is aligned with the locking hole 121 of the terminal body 1, and the locking element 4 is screwed into the locking hole 121 to firmly connect the first circuit board 2 and the terminal body 1. The connection via the locking element 4 provides stable mechanical support and thus realizes both the mechanical and electrical connection between the first circuit board 2 and the second circuit board 3.

[0037] It should be noted that the printed circuit boards in the present utility model can be, in addition to PCBs (Printed Circuit Boards), FPCs (Flexible Printed Circuits), or flexible printed circuit boards, as well as metal substrate boards, ceramic circuit boards and wound boards.

[0038] To ensure assembly accuracy between the terminal body 1 and the second circuit board 3, the end surface of the plug-in portion 131 located in the first direction X protrudes beyond the second positioning surface 131a. In this way, the plug-in portion 131 can be inserted first for pre-positioning, followed by positioning using the second positioning surface 131a, and the connection point is soldered in place. This can increase assembly efficiency and accuracy.

[0039] In a specific embodiment, the adjustment portion 11 extends in the first direction X and toward the first circuit board 2 to form the first connecting portion 12, and the adjustment portion 11 extends in the first direction X and toward the second circuit board 3 to form the second connecting portion 13. This configuration enables the terminal body 1 to form an integrated structure, ensuring connection strength and facilitating processing.

[0040] Furthermore, the inner hole 111 of the adjustment portion 11, the locking hole 121 of the first connecting portion 12 and the plug-in portion 131 of the second connecting portion 13 are arranged coaxially to ensure the connection precision.

[0041] In a specific embodiment, the length of the adjustment section 11 in the first direction X is greater than the length of the first connecting section 12 and the second connecting section 13 in order to ensure that the clamp body 1 has a sufficient adjustment length and thus has a larger adjustment range.

[0042] Optionally, the length of the adjustment section 11 in the first direction X can be between one-quarter and one-half of the total length of the clamp body 1. Furthermore, the length of the adjustment section 11 can be determined according to actual requirements, which is not limited in this document.

[0043] Optionally, the number of spiral grooves 112 can be 1 to 3, with the spiral grooves 112 being evenly distributed in the circumferential direction. The pitch of the spiral groove 112 is in the range of 3 mm to 10 mm, and the groove width of the spiral groove 112 is 1 mm to 2 mm.

[0044] For a constant diameter of the adjustment section 11, the smaller the pitch of the spiral groove 112, the lower the bending rigidity and axial rigidity of the adjustment section 11, and the stronger the deformation adaptability of the adjustment section 11. Conversely, as the pitch of the spiral groove 112 increases, the bending rigidity and axial rigidity of the adjustment section 11 gradually increase, while the deformation adaptability gradually decreases. Furthermore, the narrower the groove width of the spiral groove 112, the greater the bending rigidity and axial rigidity of the adjustment section 11, and the weaker the deformation adaptability of the adjustment section 11.Conversely, the wider the groove width of the spiral groove 112, the smaller the bending rigidity and the axial rigidity of the adjustment section 11, and the stronger the deformation adaptability of the adjustment section 11.

[0045] Experiments have shown that when the pitch of the spiral groove 112 is less than 3 mm and the groove width is more than 2 mm, the pitch of the spiral grooves 112 is too narrow and the groove width is too large, resulting in insufficient bending rigidity and axial rigidity of the adjustment section 11, and insufficient support. When the pitch of the spiral groove 112 is more than 10 mm and the groove width is less than 1 mm, the pitch of the spiral grooves 112 is too large, and the deformation adaptability of the adjustment section 11 is insufficient to effectively adjust the displacements between the circuit boards.Based on this, the spiral groove 112, with a pitch in the above-mentioned range of 3 mm to 10 mm and a groove width in the range of 1 mm to 2 mm, has the ability to compensate for positional deviations between the circuit boards by floating, as well as to fulfill a good supporting function, thereby achieving an optimal connection effect.

[0046] Furthermore, a first through-hole 132 is arranged in the second connecting portion 13, which extends in the first direction X, i.e., in the thickness direction, through the second connecting portion 13, wherein the first through-hole 132 is arranged coaxially with the inner hole 111 and communicates with the inner hole 111. This design enables a reduction in the thickness of the second connecting portion 13, thereby further reducing the hardness of the second connecting portion 13 and even increasing the soft deformable space, which leads to an increase in the floating adjustment length.

[0047] Furthermore, a second through-hole 122 is arranged in the first connecting portion 12, which extends in the first direction X, i.e., in the thickness direction, through the first connecting portion 12. The second through-hole 122 is arranged coaxially with the inner hole 111 and the first through-hole 132 and sequentially communicates with the inner hole 111 and the first through-hole 132. This configuration enables a reduction in the thickness of the first connecting portion 12, thereby further reducing the hardness of the first connecting portion 12 and even increasing the soft deformable space, which leads to an increase in the floating adjustment length.

[0048] The board-to-board connector provided in the present utility model exhibits floating adaptability and incorporates a displacement-compensating connection mechanism that effectively relieves mechanical stress. This maintains stable and reliable electrical contact between the printed circuit boards, reduces contact resistance at the electrical connection points and signal transmission losses, and improves the reliability and stability of the connection. Furthermore, the present utility model exhibits a compact structure, requires little installation space, and is easy to install and implement, increasing production efficiency and reducing installation costs. It is suitable for power electronic devices with high space requirements.

[0049] As in Fig.4. In a second aspect, the present utility model provides an electronic device comprising a first circuit board 2, a second circuit board 3, and the above-described board-to-board connection terminal, wherein the board-to-board connection terminal connects the first circuit board 2 and the second circuit board 3. The number of board-to-board connection terminals may be one, two, or more, and they are simultaneously connected between the first circuit board 2 and the second circuit board 3.

[0050] It should be noted that the electronic device provided in the present utility model has the advantageous effects of the board-to-board connection terminal according to any of the preceding embodiments. Details of this can be found in the above descriptions of the advantageous effects of the board-to-board connection terminal, which will not be discussed again in the embodiments of the present utility model.

[0051] The above describes in detail the board-to-board connecting terminal and electronic device provided by the present utility model. This document uses concrete examples to explain the principle and embodiments of the present utility model. The description of the above embodiments is only intended to help understand the method of the present utility model and its core idea. It should be noted that those skilled in the art can easily make various improvements and modifications to the present utility model without departing from the principle of the present utility model, and these improvements and modifications also fall within the scope of the present utility model.

Claims

[1] A board-to-board connection terminal, characterized by that it comprises a terminal body (1), wherein the terminal body (1) comprises: an adjustment section (11) in which an inner hole (111) is arranged, which passes through the adjustment section (11) in a first direction, wherein the outer wall surface of the adjustment section (11) is provided with a spiral groove (112) which is arranged spirally in the circumferential direction of the adjustment section (11) and in the first direction and is connected to the inner hole (111); a first connecting portion (12) arranged in the first direction at a first end of the adjustment portion (11) and serving to connect a first circuit board (2); and a second connecting portion (13) arranged at a second end of the adjustment portion (11) in the first direction and serving to connect a second circuit board (3). [2] The board-to-board connection terminal according to claim 1, characterized by in that it further comprises a locking element (4); a locking hole (121) and a first positioning surface (121a) are arranged on the side of the first connecting section (12) facing the first circuit board (2), wherein the first positioning surface (121a) surrounds the locking hole (121) and serves to position the first circuit board (2), and the locking element (4) serves to lock the first circuit board (2) to the locking hole (121). [3] The board-to-board connection terminal according to claim 2, characterized bythat a second positioning surface (131a) is arranged on the side of the second connecting section (13) facing the second circuit board (3), wherein the second positioning surface (131a) is provided with a plug-in section (131), the second positioning surface (131a) serves to position the second circuit board (3), and the plug-in section (131) serves to be inserted into a plug-in hole of the second circuit board (3). [4] The board-to-board connection terminal according to claim 3, characterized by that the end surface of the plug-in section (131) lying in the first direction projects beyond the second positioning surface (131a). [5] The board-to-board connection terminal according to claim 3, characterized bythat the adjustment section (11) extends in the first direction and towards the first circuit board (2) to form the first connecting section (12), and extends in the first direction and towards the second circuit board (3) to form the second connecting section (13), wherein the inner hole (111), the locking hole (121) and the plug-in section (131) are arranged coaxially. [6] The board-to-board connection terminal according to one of claims 1 to 5, characterized by that in the first direction the length of the adjustment section (11) is greater than the length of the first connecting section (12) and the second connecting section (13). [7] The board-to-board connection terminal according to claim 6, characterized by that in the first direction the length of the adjustment section (11) is one quarter to one half of the total length of the clamp body (1). [8] The board-to-board connection terminal according to one of claims 1 to 5, characterized by that a first through-hole (132) is arranged in the second connecting section (13), which passes through the second connecting section (13) and is connected to the inner hole (111). [9] The board-to-board connection terminal according to one of claims 1 to 5, characterized by that the number of spiral grooves (112) is 1 to 3, the pitch of the spiral groove (112) is in the range of 3 mm to 10 mm and the groove width of the spiral groove (112) is 1 mm to 2 mm. [10] An electronic device comprising a first circuit board (2) and a second circuit board (3), characterized by in that it further comprises a connecting terminal, wherein the connecting terminal is the board-to-board connecting terminal according to one of claims 1 to 9 and serves to connect the first circuit board (2) and the second circuit board (3).

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