Connecting terminal and inter-board connector using same

Abstract

The utility model relates to the field of electric connectors, in particular to a connecting terminal and an inter-board connector using the same. The connecting terminal comprises a base part, at least one end of the base part is provided with an elastic arm, the elastic arm comprises a transition section close to the base part and a contact section connected with the transition section, one end, far away from the transition section, of the contact section is provided with a contact part used for being in contact with the corresponding terminal, and the transition section is bent towards one side relative to the base part. The contact section is bent towards one side relative to the transition section, and the bending direction of the transition section relative to the base part is opposite to the bending direction of the contact section relative to the transition section. When the contact part located at the tail end of the contact section is in contact with a corresponding terminal, the two bending points, the transition section and the contact section all provide contact counterforce, so that the contact reliability is ensured, meanwhile, due to the fact that the two bending points are included, the elastic arm can have a shorter extension length in the contact direction, and the contact reliability is improved. And the requirements in a scene with a relatively small distance between the boards are met.

Description

Technical Field

[0001] This utility model relates to the field of electrical connectors, and in particular to a connection terminal and an inter-board connector using the connection terminal. Background Technology

[0002] The connection between chips and electronic functional modules and printed circuit boards (PCBs) is achieved through corresponding board-to-board connectors. When the distance between the chip or module and the PCB is sufficient, a general plug-and-socket mating structure can be used to connect the chip / module to the PCB. For example, a socket is provided on the PCB, and a plug corresponding to the socket is provided on the chip / module. The plug is inserted into the socket along with the chip or module, and the connection between the chip or module and the PCB is achieved through the contact between the plug terminals and the socket terminals.

[0003] When the gap between the chip or module and the printed circuit board is small, the plug-and-receptor connector described above cannot be used. In this case, an alternative typical board-to-board connector can be used, which includes an insulator and connecting terminals disposed within the insulator. The insulator is a plate-type structure, and the connecting terminals are mounted in mounting holes on the insulator. One end of the terminal is used to make contact with a corresponding terminal on the printed circuit board, and the other end is used to make contact with a corresponding terminal on the chip or module. In use, the insulator is positioned between the printed circuit board and the chip or functional module, and the connecting terminals enable communication between the chip / module and the printed circuit board.

[0004] For example, the patent specification with authorization announcement number CN222261428U and authorization announcement date of December 27, 2024, provides an electrical connector terminal and an electrical connector. The electrical connector includes an insulating body, i.e., an insulating plate, with mounting holes on the insulating body. A connecting terminal is installed in the mounting holes. The connecting terminal includes a base, a spring arm disposed at the upper end of the base, and a solder foot disposed at the lower end of the base. The solder foot is used for soldering to a printed circuit board (PCB). Soldering achieves electrical connection between the connecting terminal and the PCB, and also serves to fix the electrical connector to the PCB. The spring arm extends upward from the upper end of the base, and its end forms a chip contact portion for contacting a chip. In use, the chip contact portion contacts the terminals on the chip, thereby achieving conductivity between the chip and the PCB.

[0005] The aforementioned electrical connector connects the chip and the printed circuit board (PCB) via a single terminal, thus meeting the needs of applications with small gaps between the chip and the PCB. However, since the terminal in this connector establishes contact with the chip's terminal via a spring arm, the spring arm must be of a certain length to ensure sufficient elasticity for reliable contact. The spring arm in this connector has a straight-arm structure, which limits the reduction in the overall thickness of the connector. When the gap between the chip / module and the PCB is extremely small, such as less than 1mm, this electrical connector may not meet the requirements. Utility Model Content

[0006] The purpose of this invention is to provide a connection terminal to solve the problem that existing board-to-board connectors cannot meet the needs of scenarios with small board-to-board spacing.

[0007] Meanwhile, the purpose of this utility model is also to provide an inter-board connector that uses the above-mentioned connection terminals.

[0008] To solve the above problems, the connection terminal of this utility model adopts the following technical solution: the connection terminal includes a base, at least one end of the base is provided with a spring arm, the spring arm includes a transition section near the base and a contact section connected to the transition section, the end of the contact section away from the transition section is provided with a contact portion for contacting a corresponding terminal, the transition section is bent to one side relative to the base, the contact section is bent to one side relative to the transition section, and the direction of bending of the transition section relative to the base is opposite to the direction of bending of the contact section relative to the transition section.

[0009] Furthermore, the bending angle of the transition section relative to the base is 70°-100°.

[0010] Furthermore, the bending angle of the transition section relative to the base is 90°.

[0011] Furthermore, the bending angle of the contact section relative to the transition section is 30°-60°.

[0012] Furthermore, the bending angle of the contact segment relative to the transition segment is 90°.

[0013] Furthermore, the width of the contact segment narrows from one end near the transition segment to the other end.

[0014] Furthermore, the contact segment has an arc-shaped portion between its two ends to increase the elasticity of the contact segment.

[0015] Furthermore, the base is a plate-type base, and a fixing structure for fixing and engaging with an insulator is provided on the plate-type base. The fixing structure is an interference fit portion on both sides in the width direction of the base, a piercing structure on both sides in the width direction of the base, or an interference fit protrusion in the thickness direction of the base.

[0016] Furthermore, the elastic arm is provided at one end of the base, and a welding body is provided at the other end, which is used to weld to the corresponding terminal.

[0017] Furthermore, the weld body includes a pad that is bent relative to the base, and the direction of the bending relative to the base is opposite to the direction of the bending of the transition section relative to the base.

[0018] Furthermore, the pads are provided with ball-planting portions for pre-positioning solder.

[0019] Furthermore, the ball-planting portion is provided with through holes or grooves for pre-placed solder.

[0020] Furthermore, the groove is provided on the ball-planting part, the depth of the groove is 0.2-0.6 times the thickness of the ball-planting part, and the center position is offset from the base by at least 0.8 times the thickness of the ball-planting part material.

[0021] Furthermore, the diameter of the through hole or groove is 1 / 3 to 2 / 3 of the diameter of the bulb planting part.

[0022] Furthermore, a solder resist structure is provided at the intersection of the ball-planting part and the base.

[0023] Furthermore, the solder resist structure includes a solder resist coating at the intersecting locations.

[0024] Beneficial Effects: The connecting terminal of this utility model is an improved invention. Specifically, the connecting terminal of this utility model has its elastic arm configured as a structure combining a transition section and a contact section. The transition section is bent to one side relative to the base, and the contact section is bent to one side relative to the transition section. The bending direction of the transition section relative to the base is opposite to the bending direction of the contact section relative to the transition section. This creates an elastic deformation point between the transition section and the base, and another elastic deformation point between the contact section and the transition section. When the contact portion at the end of the contact section contacts the corresponding terminal, the two deformation points, the transition section itself, and the contact section itself all provide contact reaction force, thereby ensuring the reliability of the contact. At the same time, due to the inclusion of the two bending points, the elastic arm can also have a shorter extension length in the contact direction, meeting the needs of scenarios with small inter-board spacing.

[0025] The inter-board connector of this utility model adopts the following technical solution:

[0026] An inter-board connector includes an insulator on which a connection terminal is fixedly mounted. Each connection terminal includes a base, and at least one end of the base has a spring arm. The spring arm includes a transition section near the base and a contact section connected to the transition section. The end of the contact section away from the transition section has a contact portion for contacting a corresponding terminal. The transition section is bent to one side relative to the base, and the contact section is also bent to one side relative to the transition section. The direction in which the transition section is bent relative to the base is opposite to the direction in which the contact section is bent relative to the transition section.

[0027] Furthermore, the bending angle of the transition section relative to the base is 70°-100°.

[0028] Furthermore, the bending angle of the transition section relative to the base is 90°.

[0029] Furthermore, the bending angle of the contact section relative to the transition section is 30°-60°.

[0030] Furthermore, the bending angle of the contact segment relative to the transition segment is 90°.

[0031] Furthermore, the width of the contact segment narrows from one end near the transition segment to the other end.

[0032] Furthermore, the contact segment has an arc-shaped portion between its two ends to increase the elasticity of the contact segment.

[0033] Furthermore, the base is a plate-type base, and a fixing structure for fixing and engaging with an insulator is provided on the plate-type base. The fixing structure is an interference fit portion on both sides in the width direction of the base, a piercing structure on both sides in the width direction of the base, or an interference fit protrusion in the thickness direction of the base.

[0034] Furthermore, the elastic arm is provided at one end of the base, and a welding body is provided at the other end, which is used to weld to the corresponding terminal.

[0035] Furthermore, the weld body includes a pad that is bent relative to the base, and the direction of the bending relative to the base is opposite to the direction of the bending of the transition section relative to the base.

[0036] Furthermore, the pads are provided with ball-planting portions for pre-positioning solder.

[0037] Furthermore, the ball-planting portion is provided with through holes or grooves for pre-placed solder.

[0038] Furthermore, the groove is provided on the ball-planting part, the depth of the groove is 0.2-0.6 times the thickness of the ball-planting part, and the center position is offset from the base by at least 0.8 times the thickness of the ball-planting part material.

[0039] Furthermore, the diameter of the through hole or groove is 1 / 3 to 2 / 3 of the diameter of the bulb planting part.

[0040] Furthermore, a solder resist structure is provided at the intersection of the ball-planting part and the base.

[0041] Furthermore, the solder resist structure includes a solder resist coating at the intersecting locations.

[0042] Beneficial Effects: The board-to-board connector of this utility model is an improved invention. Specifically, the spring arm of the connection terminal of the board-to-board connector of this utility model is designed as a structure combining a transition section and a contact section. The transition section is bent to one side relative to the base, and the contact section is bent to one side relative to the transition section. The bending direction of the transition section relative to the base is opposite to the bending direction of the contact section relative to the transition section. This forms an elastic deformation point between the transition section and the base, and another elastic deformation point between the contact section and the transition section. When the contact portion at the end of the contact section contacts the corresponding terminal, the above two deformation points, as well as the transition section and the contact section itself, will provide contact reaction force, thereby ensuring the reliability of the contact. At the same time, due to the inclusion of the above two bending points, the spring arm can also have a shorter extension length in the contact direction, meeting the needs of scenarios with small board-to-board spacing. Attached Figure Description

[0043] Figure 1 This is a perspective view of Embodiment 1 of the connecting terminal of this utility model;

[0044] Figure 2 yes Figure 1 Front view of the connection terminals;

[0045] Figure 3 yes Figure 1 Right view of the connecting terminals;

[0046] Figure 4 yes Figure 1 A schematic diagram showing the connection terminals being installed to the insulator;

[0047] Figure 5 yes Figure 4 A schematic diagram of the structure of the insulator in the diagram;

[0048] Figure 6 This is a front view of embodiment 2 of the connecting terminal of this utility model;

[0049] Figure 7 yes Figure 6 Left view of the connecting terminals;

[0050] Figure 8 This is a front view of embodiment 3 of the connecting terminal of this utility model;

[0051] Figure 9 yes Figure 8 Left view of the connecting terminals;

[0052] Figure 10 This is a perspective view of embodiment 4 of the connecting terminal of this utility model.

[0053] In the diagram: 1. Connecting terminal; 101. Base; 1011. Interference fit part; 1012. Puncture structure; 1013. Interference fit protrusion; 102. Spring arm; 1021. Transition section; 1022. Contact section; 10221. Contact part; 103. Solder pad; 104. Pre-placed solder; 105. Solder resist coating; 106. Solder resist hole; 2. Insulator; 201. Mounting hole; 202. Limiting boss. Detailed Implementation

[0054] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0055] The terminal distribution of a chip / module is similar to that of a printed circuit board (PCB). Therefore, when selecting electrical connectors, they can be viewed as small PCBs, and inter-board connectors can be used to connect the chip / module to the PCB. Currently, with the development of modern technology, there is a strong demand for chip-to-board interconnection solutions with ultra-low profile, fine pitch, and high speed characteristics. To meet these demands, inter-board connectors must have a sufficiently short size, which places higher requirements on the performance of the connection terminals.

[0056] Typically, the connection between board-to-board connectors and printed circuit boards (PCBs) is either soldered or abutted. Generally, one end is soldered and the other abutted, or both ends are abutted. Abutting is the most common contact method. To ensure reliable contact between the connector terminals and their corresponding terminals, the spring arm of the connector terminal generally needs to be of sufficient length to provide adequate rebound force. In the structures commonly used in current technology, the spring arm is usually a straight cantilever structure with a certain angle of inclination. While meeting contact reliability requirements, this results in a relatively long overhang in the mating direction. When abutting with the corresponding terminal, the degree of bending must be controlled. Therefore, after mating with the corresponding component, such as the PCB, a considerable distance must be maintained between the PCB and the insulator of the board-to-board connector.

[0057] Based on the above analysis of existing technologies, it is evident that if the extension distance in the mating direction can be reduced while ensuring the spring arm has a certain total length and meeting the requirements for rebound force and stress dispersion, then the inter-board connector can be suitable for applications with smaller spacing. The technical solution for the connection terminal of this utility model is proposed based on the above inventive concept.

[0058] Based on the above inventive concept, a basic embodiment of the connection terminal of this utility model is as follows: The connection terminal 1 includes a base 101, at least one end of the base 101 is provided with a spring arm 102, the spring arm 102 includes a transition section 1021 near the base and a contact section 1022 connected to the transition section 1021, the end of the contact section 1022 away from the transition section 1021 is provided with a contact portion 10221 for contacting a corresponding terminal, the transition section 1021 is bent to one side relative to the base 101, the contact section 1022 is bent to one side relative to the transition section 1021, the direction of bending of the transition section 1021 relative to the base 101 is opposite to the direction of bending of the contact section 1022 relative to the transition section 1021.

[0059] In the above basic implementation, the base 101 refers to the fixed part during use. When used in an inter-board connector, the base 101 cooperates with the insulator 2 of the inter-board connector to fix the connecting terminal 1 as a whole onto the insulator 2. The spring arm 102 is an elastic arm used to mate with the corresponding terminal (such as a terminal on a printed circuit board, a terminal on a chip, a terminal on an electronic module, etc.) to achieve the conduction of current or signal. The spring arm 102 includes a transition section 1021 and a contact section 1022. The transition section 1021 is closer to the base 101 than the contact section 1022. Therefore, the term "transition" here refers to the transition between the contact section 1022 and the base 101. The contact section 1022 is used to mate with the corresponding terminal. Therefore, the contact part 10221 specifically for contacting the corresponding terminal is provided on the contact section, specifically on the end of the contact section 1022 away from the transition section 1021. It forms a structure similar to the fingertip of a finger, which is to enable the connecting terminal to generate greater rebound force.

[0060] like Figures 1-3 As shown, the transition segment 1021 bends to one side relative to the base 101. After bending, an elastic point is formed between the transition segment 1021 and the base 101. The contact segment 1022 bends to one side relative to the transition segment 1021, and the direction of bending of the transition segment 1021 relative to the base 101 is opposite to the direction of bending of the contact segment 1022 relative to the transition segment 1021. This causes the contact segment 1022 and the transition segment 1021 to form a "folded" structure together. When the contact portion 10221 contacts the corresponding terminal and is driven by a force that causes it to swing relative to the transition segment 1021, a rebound force will be generated at the bending position between the contact segment 1022 and the transition segment 1021. At the same time, the position where the transition segment 1021 connects to the base 101 will also bend. Figure 2The further counterclockwise bending shown will generate a rebound force. In addition, the contact section 1022 and the transition section 1021 will also undergo a certain amount of deformation, which will generate a rebound force, thereby providing sufficient contact pressure for the contact part 10221 and ensuring the reliability of contact with the corresponding terminal.

[0061] Because of the aforementioned "folded" structure, while maintaining reliable contact between the connecting terminal 1 and the corresponding terminal, the extension length of the connecting terminal 1 in its mating direction is also folded. Therefore, it can be used for connections between components with smaller spacing, such as connections between chips and printed circuit boards with smaller spacing, connections between modules and printed circuit boards, or connections between printed circuit boards.

[0062] Based on the above basic implementation, as a preferred embodiment, the bending angle of the transition segment 1021 relative to the base 101 is 70°-100°. As analyzed in the above basic implementation, theoretically, the bending angle of the transition segment 1021 relative to the base 101 can be any angle, provided that the transition segment 1021 is indeed bent relative to the base 101. However, when the angle is 70°-100°, the thickness of the insulator 2 of the inter-board connector, i.e., the depth of the hole used to install the connection terminal 1, can be utilized to a greater extent, so that the swing of the transition segment 1021 does not exceed the set distance as much as possible. This allows the insulator 2 to be made thinner, further meeting the requirements of small pitch. Ideally, the bending angle of the transition segment 1021 relative to the base 101 is 90°.

[0063] Similar to transition segment 1021, based on the purpose of bending contact segment 1022 relative to transition segment 1021, and provided that bending does indeed occur, the bending angle of contact segment 1022 relative to transition segment 1021 can theoretically be any angle. Therefore, as a preferred embodiment, the bending angle of contact segment 1022 relative to transition segment 1021 is 30°-60°. More ideally, the bending angle of contact segment 1022 relative to transition segment 1021 is 90°.

[0064] Based on the above embodiments, as a preferred embodiment, the width of the contact segment 1022 narrows from one end near the transition segment 1021 to the other end. Since the contact surface area of ​​the terminals to be connected is limited, and the distance between terminals on the components to be connected may be small, the contact portion 10221 often needs to have a narrow width to avoid interference with non-target terminals. By configuring the contact segment 1022 to narrow from one end near the transition segment to the other end, it is ensured that the root of the contact segment 1022, i.e., the end away from the contact portion 10221, has a wider width, thereby further ensuring sufficient elasticity and improving contact reliability. Of course, the transition segment 1021 can also have a wider width, for example, equal to the width at the widest point of the contact segment 1022, to further increase the contact force.

[0065] Based on the above embodiments, the contact segment 10221 has an arc-shaped portion between its two ends to increase the elasticity of the contact segment 1022. The arc-shaped structure itself has certain deformation and rebound characteristics, and the elasticity of the contact segment is increased by utilizing these characteristics. It should be noted that although arc-shaped portions are provided at both ends of the contact segment 1022 in the above embodiments, in other embodiments, the contact segment can be made entirely into a straight line, which should be understood by those skilled in the art.

[0066] As mentioned above, the main function of the base 101 is to cooperate with the insulator 2 to fix the connecting terminal 1 in the insulator 2, such as... Figures 4-5 As shown, in a typical embodiment, the base 101 is a plate-type base, meaning that the base 101 is plate-shaped. A fixing structure for fixedly engaging with the insulator 2 is provided on the plate-type base. When the base 101 is a plate-type base, the fixing structure can be an interference fit portion 1011 on both sides of the base 101 in the width direction (e.g., Figures 1-3 ), the piercing structures 1012 on both sides in the width direction of the base (such as Figures 6-7 ) or interference fit convex hull 1013 in the base thickness direction (e.g. Figures 8-9 Of course, in other embodiments, the plate-type base can be replaced by a base with other structural forms. For example, the base 101 can be frame-shaped, thus forming a frame-type base. It only needs to be able to satisfy the requirement of fixed fit with the insulator 2.

[0067] In a typical embodiment, the base 101 has a spring arm 102 at one end and a welding body at the other end for welding to a corresponding terminal. In this case, the connecting terminal can be used in scenarios where one end is fixed to the printed circuit board and the other end abuts against a corresponding component. After the welding body is welded to the corresponding terminal, relative fixation between the board connector and the corresponding component can be achieved simultaneously. In other embodiments, when it is necessary for the connecting terminal 1 to abut against terminals on both sides, the spring arm 102 can be provided at both ends of the base, in which case the welding body is no longer required.

[0068] When a weld body is provided, the weld body may adopt the following structure: the weld body includes a pad 103, the pad 103 is bent relative to the base 101, and the direction of bending relative to the base 101 is opposite to the direction of bending of the transition section 1021 relative to the base 101.

[0069] To set the pre-placed solder, a ball-mounting section can be provided on the pad 103. The pre-placed solder 104 is pre-placed on the ball-mounting section by hot balling or cold balling, and the connection terminal is soldered to the matching terminal by reflow soldering. Of course, in other embodiments, the pre-placed solder 104 is not necessary to meet the soldering process requirements.

[0070] When a ball-planting section is provided, in order to better position and hold the pre-placed solder 104, the ball-planting section is provided with through holes or grooves for pre-placed solder. The diameter of the through holes or grooves is 1 / 3 to 2 / 3 of the diameter of the ball-planting section. When the groove is provided on the ball-planting section, the depth of the groove is 0.2 to 0.6 times the thickness of the ball-planting section, and the center position is offset from the base by at least 0.8 times the thickness of the ball-planting section.

[0071] To control the area of ​​action during welding, a weld-resistant structure is provided at the intersection of the ball-planting portion and the base. In some embodiments, the weld-resistant structure includes a weld-resistant coating 105 at the intersection; in other embodiments, such as... Figure 10 As shown, the solder resist structure can also be a solder resist hole 106.

[0072] The implementation method of the inter-board connector of this utility model is as follows:

[0073] The board-to-board connector of this utility model includes an insulator 2, on which mounting holes 201 are provided, and connecting terminals 1 are mounted on the insulator through the mounting holes 201. Figure 5As shown, the mounting hole 201 includes a fixing portion for engaging with the base 101 of the connecting terminal 1 to fix the base 101, and a clearance portion corresponding to the transition section of the connecting terminal for avoiding the transition section. To fully utilize the space on the insulator and arrange as many connecting terminals as possible, each connecting terminal is arranged at a 45° angle. This arrangement structure can be found in the patent specification of the applicant's authorized publication number CN220731844U, and will not be elaborated here. A support boss 202 is provided on the connector welding surface of the insulator 2 to support and ensure the flatness of the connector and the spacing between the connector plates after welding, preventing excessive collapse of the solder joints.

[0074] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.

Claims

1. A connecting terminal, comprising a base (101), wherein at least one end of the base is provided with a spring arm (102), characterized in that, The spring arm includes a transition section (1021) near the base and a contact section (1022) connected to the transition section. The end of the contact section away from the transition section is provided with a contact portion (10221) for contacting a corresponding terminal. The transition section (1021) is bent to one side relative to the base, and the contact section (1022) is bent to one side relative to the transition section. The direction in which the transition section (1021) is bent relative to the base (101) is opposite to the direction in which the contact section is bent relative to the transition section.

2. The connection terminal according to claim 1, characterized in that, The bending angle of the transition section (1021) relative to the base (101) is 70°-100°.

3. The connecting terminal according to claim 2, characterized in that, The bending angle of the transition section (1021) relative to the base (101) is 90°.

4. The connecting terminal according to any one of claims 1-3, characterized in that, The bending angle of the contact section (1022) relative to the transition section (1021) is 30°-60°.

5. The connecting terminal according to claim 4, characterized in that, The bending angle of the contact section (1022) relative to the transition section (1021) is 90°.

6. The connecting terminal according to claim 4, characterized in that, The width of the contact segment (1022) narrows from one end near the transition segment (1021) to the other end.

7. The connecting terminal according to claim 6, characterized in that, The contact segment (1022) has an arc-shaped portion between its two ends to increase the elasticity of the contact segment.

8. The connecting terminal according to any one of claims 1-3, characterized in that, The base (101) is a plate-type base, and a fixing structure for fixing and engaging with the insulator (2) is provided on the plate-type base. The fixing structure is an interference fit portion (1011) on both sides in the width direction of the base, a piercing structure (1012) on both sides in the width direction of the base, or an interference fit protrusion (1013) in the thickness direction of the base.

9. The connecting terminal according to any one of claims 1-3, characterized in that, One end of the base (101) is provided with the spring arm (102), and the other end is provided with a welding body, which is used to weld to the corresponding terminal.

10. The connecting terminal according to claim 9, characterized in that, The weld body includes a pad (103) that is bent relative to the base (101), and the direction of the bend relative to the base is opposite to the direction of the transition section bend relative to the base.

11. The connection terminal according to claim 10, characterized in that, The pad (103) is provided with a ball-planting section for pre-placing solder (104).

12. The connection terminal according to claim 11, characterized in that, The ball-planting part is provided with through holes or grooves for pre-placing solder (104).

13. The connecting terminal according to claim 12, characterized in that, The groove is provided on the ball-planting part, the depth of the groove is 0.2-0.6 times the thickness of the ball-planting part, and the center position is offset from the base by at least 0.8 times the thickness of the ball-planting part.

14. The connecting terminal according to claim 12 or 13, characterized in that, The diameter of the through hole or groove is 1 / 3 to 2 / 3 of the diameter of the bulb planting part.

15. The connection terminal according to claim 11, characterized in that, A solder resist structure is provided at the intersection of the ball-planting part and the base (101).

16. The connecting terminal according to claim 15, characterized in that, The solder resist structure includes a solder resist coating (105) at the intersection location.

17. An inter-board connector, comprising an insulator (2), wherein a connecting terminal (1) is fixedly mounted on the insulator, characterized in that, The connecting terminal is the connecting terminal as described in any one of claims 1-16.

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