Connection terminal and inter-board connector using same

Abstract

The invention 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] The present invention relates to the field of electrical connectors, and in particular to a connecting terminal and an inter-board connector using the connecting terminal. Background Art

[0002] The connection between the chip and the electronic function module and the printed circuit board is realized through the corresponding inter-board connector. When the distance between the chip or module and the printed circuit board is relatively sufficient, the chip / module can be connected to the printed circuit board by using a general plug-and-socket plug-in structure, for example, a socket is provided on the printed circuit board, and a plug corresponding to the socket is provided on the chip / module. The plug is plugged into the socket along with the chip or module, and the connection between the chip or module and the printed circuit board is realized by the contact between the plug terminal and the socket terminal.

[0003] When the interval between the chip or module and the printed circuit board is small, the above-mentioned plug-socket matching connector cannot be used. In this case, another typical structure of an inter-board connector can be used, which includes an insulator and a connecting terminal provided in the insulator. The insulator is a plate-type structure, and the connecting terminal is installed in the mounting hole provided on the insulator, one end of which is used to contact and conduct with the corresponding terminal on the printed circuit board, and the other end is used to conduct with the corresponding terminal on the chip or module. When in use, the insulator is provided between the printed circuit board and the chip or functional module, and the conduction between the chip / module and the printed circuit board is achieved through the connecting terminal.

[0004] For example, the patent specification of the applicant with the authorization announcement number CN222261428U and the authorization announcement date December 27, 2024 provides an electrical connector terminal and an electrical connector. The electrical connector includes an insulating body, which is an insulating board. A mounting hole is provided on the insulating body, and a connecting terminal is installed in the mounting hole. The connecting terminal includes a base, an elastic arm provided at the upper end of the base, and a welding foot provided at the lower end of the base. The welding foot is used for welding with a printed circuit board. On the one hand, the electrical connection between the connecting terminal and the printed circuit board can be achieved through welding, and on the other hand, it can also play a role in fixing the electrical connector to the printed circuit board. The elastic arm extends upward from the upper end of the base, and a chip contact portion for contacting the chip is formed at its end. When in use, the chip contact portion contacts the terminal on the chip, thereby achieving conduction between the chip and the printed circuit board.

[0005] The above-mentioned electrical connector electrically connects the chip and the printed circuit board through the two ends of a connecting terminal, so it can meet the use scenario where the distance between the chip and the printed circuit board is small. However, since the connecting terminal in the above-mentioned connector is connected to the terminal of the chip through an elastic arm, in order to ensure that the elastic arm has sufficient elastic force to meet the demand for reliable contact, the elastic arm must have a certain length. The elastic arm of the above-mentioned connecting terminal is a straight arm structure, which limits the reduction of the overall thickness of the electrical connector. When the distance between the chip / module and the printed circuit board is extremely small, such as less than 1mm, the above-mentioned electrical connector may not be able to meet the demand. Summary of the invention

[0006] The object of the present invention is to provide a connecting terminal to solve the problem that the existing board-to-board connector cannot meet the requirements in the scenario where the distance between boards is small.

[0007] At the same time, the present invention also aims to provide an inter-board connector using the above-mentioned connecting terminal.

[0008] In order to solve the above problems, the connecting terminal of the present invention adopts the following technical solution: the connecting terminal includes a base, at least one end of the base is provided with an elastic arm, the elastic arm includes a transition section close to 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 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.

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

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

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

[0014] Furthermore, an arc portion is provided between the two ends of the contact segment to increase the elastic force of the contact segment.

[0015] Furthermore, the base is a plate-type base, on which a fixing structure for fixedly fitting with an insulator is arranged, and the fixing structure is an interference fit portion on both sides in the width direction of the base, a puncture structure on both sides in the width direction of the base, or an interference fit convex hump in the thickness direction of the base.

[0016] Furthermore, the elastic arm is arranged at one end of the base, and a welding body is arranged at the other end, and the welding body is used for welding with a corresponding terminal.

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

[0018] Furthermore, a ball planting portion is provided on the pad for pre-setting solder.

[0019] Furthermore, the ball implanting portion is provided with a through hole or a groove for pre-setting solder.

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

[0021] Furthermore, the diameter of the through hole or the groove is 1 / 3-2 / 3 of the diameter of the ball implanting part.

[0022] Furthermore, a solder resist structure is provided at the intersection of the ball implanting portion and the base portion.

[0023] Furthermore, the solder resist structure includes a solder resist coating at the intersection position.

[0024] Beneficial effects: The connecting terminal of the present invention is an improved invention. Specifically, the connecting terminal of the present invention sets its elastic arm as a structural form in which a transition section and a contact section are combined, and 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 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, so that an elastic deformation point can be formed at a position between the transition section and the base, and another elastic deformation point can be formed at a position 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 and the transition section itself 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 elastic arm can also have a shorter extension length in the contact direction to meet the needs of the scenario with a small spacing between the boards.

[0025] The inter-board connector of the present invention adopts the following technical solutions: An inter-board connector includes an insulator on which a connecting terminal is fixedly mounted, the connecting terminal includes a base, at least one end of the base is provided with an elastic arm, the elastic arm includes a transition section close to the base and a contact section connected to the transition section, an 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 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.

[0026] Furthermore, the bending angle of the transition section relative to the base is 70°-100°.

[0027] Furthermore, the bending angle of the transition section relative to the base is 90°.

[0028] Furthermore, a bending angle of the contact section relative to the transition section is 30°-60°.

[0029] Furthermore, a bending angle of the contact section relative to the transition section is 90°.

[0030] Furthermore, the width of the contact section narrows from one end close to the transition section to the other end.

[0031] Furthermore, an arc portion is provided between the two ends of the contact segment to increase the elastic force of the contact segment.

[0032] Furthermore, the base is a plate-type base, on which a fixing structure for fixedly fitting with an insulator is arranged, and the fixing structure is an interference fit portion on both sides in the width direction of the base, a puncture structure on both sides in the width direction of the base, or an interference fit convex hump in the thickness direction of the base.

[0033] Furthermore, the elastic arm is arranged at one end of the base, and a welding body is arranged at the other end, and the welding body is used for welding with a corresponding terminal.

[0034] Furthermore, the welding body includes a welding pad, which is bent relative to the base, and the bending direction of the welding pad relative to the base is opposite to the bending direction of the transition section relative to the base.

[0035] Furthermore, a ball planting portion is provided on the pad for pre-setting solder.

[0036] Furthermore, the ball implanting portion is provided with a through hole or a groove for pre-setting solder.

[0037] Furthermore, the groove is provided on the ball planting part, the depth of the groove is 0.2-0.6 of the thickness of the ball planting part, and the center position deviates from the base by at least 0.8 times the thickness of the ball planting part.

[0038] Furthermore, the diameter of the through hole or the groove is 1 / 3-2 / 3 of the diameter of the ball implanting part.

[0039] Furthermore, a solder resist structure is provided at the intersection of the ball implanting portion and the base portion.

[0040] Furthermore, the solder resist structure includes a solder resist coating at the intersection position.

[0041] Beneficial effects: The inter-board connector of the present invention is an improved invention. Specifically, the elastic arm of the connecting terminal of the inter-board connector of the present invention is set to a structural form in which a transition section and a contact section are combined, and 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 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, so that an elastic deformation point can be formed at a position between the transition section and the base, and another elastic deformation point can be formed at a position 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 and the transition section itself 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 elastic arm can also have a shorter extension length in the contact direction to meet the needs of the scenario with a small spacing between the boards. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 is a perspective view of embodiment 1 of the connecting terminal of the present invention; Figure 2 yes Figure 1 A front view of the connection terminal in FIG. Figure 3 yes Figure 1 Right side view of the connection terminal in; Figure 4 yes Figure 1 Schematic diagram of the connection terminal being mounted to the insulator; Figure 5 yes Figure 4 Schematic diagram of the structure of the insulator in; Figure 6 is a front view of a second embodiment of a connecting terminal of the present invention; Figure 7 yes Figure 6 Left side view of the connection terminal in; Figure 8 is a front view of a third embodiment of a connecting terminal of the present invention; Fig. 9 yes Figure 8 Left side view of the connection terminal in; Fig.10 It is a perspective view of Example 4 of the connection terminal of the present invention.

[0043] In the figure: 1. connecting terminal; 101. base; 1011. interference fit portion; 1012. puncture structure; 1013. interference fit convex bump; 102. elastic arm; 1021. transition section; 1022. contact section; 10221. contact portion; 103. solder pad; 104. pre-set solder; 105. solder resist coating; 106. solder resist hole; 2. insulator; 201. mounting hole; 202. limiting boss. DETAILED DESCRIPTION

[0044] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0045] The terminal distribution of the chip / module is similar to the terminal distribution on the printed circuit board. Therefore, when selecting an electrical connector, it can be regarded as a small printed circuit board, and an inter-board connector is selected to achieve the connection between the chip / module and the printed circuit board. At present, 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. If you want to meet the above requirements, the inter-board connector is required to be short enough, which puts higher requirements on the performance of the connection terminals.

[0046] Normally, the connection between the inter-board connector and the printed circuit board / chip is welding or elastic abutment, generally using a method of welding at one end and abutting at the other end, or using a method of abutting at both ends. Abutment is the most common contact method. In order to ensure the reliability of contact between the connecting terminal and the corresponding terminal, the elastic arm of the connecting terminal is generally required to have a sufficient length so as to provide sufficient resilience. In the structure commonly used in the prior art, the elastic arm is generally a straight cantilever structure with a certain inclination angle. When the contact reliability is met, there will be a long overhang distance in the docking direction. When abutting with the corresponding terminal, it is necessary to control the degree of bending. Therefore, after docking with the corresponding component, such as a printed circuit board, the printed circuit board needs to maintain a large distance from the insulator of the inter-board connector.

[0047] Combined with the above analysis of the prior art, it can be seen that if the extension distance in the docking direction can be reduced while ensuring that the elastic arm has a certain total length and its resilience and stress dispersion requirements are met, the board-to-board connector can be used in occasions with smaller spacing. The technical solution of the connecting terminal of the present invention is proposed based on the above inventive concept.

[0048] Based on the above inventive concept, a basic embodiment of the connecting terminal of the present invention is as follows: a connecting terminal 1, comprising a base 101, wherein at least one end of the base 101 is provided with an elastic arm 102, wherein the elastic arm 102 comprises a transition section 1021 close to the base and a contact section 1022 connected to the transition section 1021, wherein an end of the contact section 1022 away from the transition section 1021 is provided with a contact portion 10221 for contacting a corresponding terminal, wherein the transition section 1021 is bent to one side relative to the base 101, and the contact section 1022 is bent to one side relative to the transition section 1021, and 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 1022 is bent relative to the transition section 1021.

[0049] In the above basic implementation, the base 101 refers to a fixed part when in use. When used in a board-to-board connector, the base 101 cooperates with the insulator 2 of the board-to-board connector to fix the connecting terminal 1 as a whole on the insulator 2. The elastic arm 102 is an elastic arm, which is used to dock 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.) when in use to achieve the conduction of current or signal. The elastic 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 so-called "transition" here refers to the transition between the contact section 1022 and the base 101. The function of the contact section 1022 is to dock with the corresponding terminal. Therefore, the contact portion 10221 specifically used for contacting the corresponding terminal is provided on the contact section, specifically, it is provided on the end of the contact section 1022 away from the transition section 1021, which forms a structure similar to the fingertip, so that the connecting terminal can generate a greater resilience.

[0050] like Figure 1-3 As shown, the transition section 1021 is bent to one side relative to the base 101, and after bending, an elastic point will be formed between the transition section 1021 and the base 101, and the contact section 1022 is bent to one side relative to the transition section 1021, and the bending direction of the transition section 1021 relative to the base 101 is opposite to the bending direction of the contact section 1022 relative to the transition section 1021, thereby forming a "folding" structure with the contact section 1022 and the transition section 1021. When the contact portion 10221 contacts the corresponding terminal and is subjected to a force driving it to swing relative to the transition section 1021, a rebound force will be generated at the bending position between the contact section 1022 and the transition section 1021, and at the same time, the position where the transition section 1021 is connected to the base 101 will also be swung around Figure 2Further bending in the counterclockwise direction as shown will generate a rebound force at the same time. In addition, the contact section 1022 and the transition section 1021 themselves will also produce a certain amount of deformation, thereby generating a rebound force, thereby providing sufficient contact pressure for the contact portion 10221 to ensure the reliability of contact with the corresponding terminal.

[0051] Due to the adoption of the above-mentioned "folding" structure, while maintaining reliable contact between the connecting terminal 1 and the corresponding terminal, the extension length of the connecting terminal 1 in its docking direction is also folded at the same time, so it can be suitable for connection between components with smaller spacing, such as connection between chips with smaller spacing and printed circuit boards, connection between modules and printed circuit boards, or connection between printed circuit boards.

[0052] On the basis of the above basic implementation, as a preferred implementation, the bending angle of the transition section 1021 relative to the base 101 is 70°-100°. Combined with the analysis of the above basic implementation, it can be seen that, under the premise of ensuring that the transition section 1021 is indeed bent relative to the base 101, the bending angle of the transition section 1021 relative to the base 101 can be any angle in theory, but when the angle is 70°-100°, the thickness of the insulator 2 of the inter-board connector, that is, the depth of the hole for installing the connecting terminal 1, can be used to a large extent, so that the swing of the transition section 1021 does not exceed the set distance as much as possible, thereby making the insulator 2 thinner to further meet the needs of small spacing. Under a relatively ideal state, the bending angle of the transition section 1021 relative to the base 101 is 90°.

[0053] Similar to the transition section 1021, based on the purpose of the bending of the contact section 1022 relative to the transition section 1021, the bending angle of the contact section 1022 relative to the transition section 1021 can theoretically be any angle, provided that the contact section 1022 is indeed bent relative to the transition section 1021. On this basis, as a preferred embodiment, the bending angle of the contact section 1022 relative to the transition section 1021 is 30°-60°. More ideally, the bending angle of the contact section 1022 relative to the transition section 1021 is 90°.

[0054] On the basis of the above-mentioned embodiments, as a preferred embodiment, the width of the contact section 1022 narrows from one end close to the transition section 1021 to the other end. Since the contact surface area of ​​the terminal to be connected is limited, and the distance between the terminals on the components to be connected may be small, in order to avoid interference with non-target terminals, the contact portion 10221 often needs to have a narrower width. Here, the contact section 1022 is set to a structure that narrows from one end close to the transition section to the other end, which can ensure that the root of the contact section 1022, that is, the end away from the contact portion 10221, can have a wider width, thereby further ensuring that it has sufficient elastic force and further improving the reliability of contact. Of course, at this time, the transition section 1021 can also have a wider width, for example, equal to the width at the widest position of the contact section 1022, to further increase the contact force.

[0055] On the basis of the above-mentioned embodiments, the contact segment 10221 has an arc portion between the two ends to increase the elastic force of the contact segment 1022. The arc structure itself has certain deformation and rebound characteristics, and the elastic force of the contact segment is increased by utilizing this characteristic. It should be particularly noted here that, although in the above-mentioned embodiments, arc portions are provided at both ends of the contact segment 1022, in other embodiments, the contact segment as a whole can also be set to be linear, which should be understandable to those skilled in the art.

[0056] 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. Figure 4-5 As shown, in a typical embodiment, the base 101 is a plate-type base, which means that the base 101 is in the shape of a plate, and a fixing structure for fixing 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 (such as Figure 1-3 ), the puncture structures 1012 on both sides in the width direction of the base (such as Figure 6-7 ) or the interference fit convex hump 1013 in the thickness direction of the base (such as Figure 8-9 Of course, in some other embodiments, the plate-type base can also be replaced by a base of other structural forms, for example, the base 101 can be in a frame shape, in which case it forms a frame-type base. It only needs to be able to meet the requirements of fixed cooperation with the insulator 2.

[0057] In a typical embodiment, the elastic arm 102 is provided at one end of the base 101, and a welding body is provided at the other end, and the welding body is used to be welded with the corresponding terminal. In this case, the connecting terminal can be used in a scenario where one end is fixed to the printed circuit board and the other end is abutted with the corresponding component. At this time, after the welding body is welded to the corresponding terminal, the relative fixation between the inter-board connector and the corresponding component can be achieved at the same time. In other embodiments, when the connecting terminal 1 is required to abut and contact with the terminals on both sides, the elastic arm 102 can also be provided at both ends of the base, and there is no need to provide a welding body at this time.

[0058] When a welding body is provided, the welding body may adopt the following structure: the welding body includes a welding pad 103 , the welding pad 103 is bent relative to the base 101 , and the bending direction relative to the base 101 is opposite to the bending direction of the transition section 1021 relative to the base 101 .

[0059] In order to set the pre-set solder, a ball planting part can be set on the pad 103, and the pre-set solder 104 can be pre-set on the ball planting part by hot ball planting or cold ball planting, and the connecting terminal and the matching terminal are welded by the reflow process. Of course, in other embodiments, in order to meet the welding process requirements, the pre-set solder 104 is not necessary.

[0060] When the ball planting part is provided, in order to better realize the positioning and fixing of the pre-placed solder 104, the ball planting part is provided with a through hole or a groove for pre-placed solder. The diameter of the through hole or the groove is 1 / 3-2 / 3 of the diameter of the ball planting part. When the groove is provided on the ball planting part, the depth of the groove is 0.2-0.6 of the thickness of the ball planting part, and the center position deviates from the base by at least 0.8 times the thickness of the ball planting part.

[0061] In order to control the range of action during welding, a solder resist structure is provided at the intersection of the ball implant portion and the base portion. In some embodiments, the solder resist structure includes a solder resist coating 105 at the intersection. In other embodiments, Fig.10 As shown, the solder resist structure may also be a solder resist hole 106 .

[0062] The implementation of the board-to-board connector of the present invention is as follows: The board-to-board connector of the present invention comprises an insulator 2, on which a mounting hole 201 is provided, and a connecting terminal 1 is mounted on the insulator through the mounting hole 201. Figure 5As shown, the mounting hole 201 includes a fixing portion for cooperating with the base 101 of the connecting terminal 1 to fix the base 101 and a avoiding portion corresponding to the transition section of the connecting terminal for avoiding the transition section. In order to make full use of the space on the insulator and arrange as many connecting terminals as possible, each connecting terminal is arranged at an angle of 45°. The arrangement structure can refer to the description of the patent specification of the applicant with the authorization announcement number CN220731844U, which will not be repeated here. A supporting boss 202 is provided on the welding surface of the insulator 2 corresponding to the connector, which supports and ensures the flatness of the connector and the board spacing after the connector is welded, and avoids the transition collapse of the solder joint.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. A connecting terminal, comprising a base (101), at least one end of the base being provided with an elastic arm (102), characterized in that: The elastic arm comprises a transition section (1021) close to the base and a contact section (1022) connected to the transition section; an 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; the contact section (1022) is bent to one side relative to the transition section; and 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 connecting 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 to 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 section (1022) narrows from one end close to the transition section (1021) to the other end.

7. The connecting terminal according to claim 6, characterized in that: An arc-shaped portion is provided between the two ends of the contact segment (1022) to increase the elastic force of the contact segment.

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

9. The connecting terminal according to any one of claims 1 to 3, characterized in that: The elastic arm (102) is arranged at one end of the base (101), and a welding body is arranged at the other end, the welding body being used for welding with a corresponding terminal.

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

11. The connecting terminal according to claim 10, characterized in that: A ball planting portion is provided on the solder pad (103) for pre-setting solder (104).

12. The connecting terminal according to claim 11, characterized in that: The ball implanting portion is provided with a through hole or a groove for pre-setting solder (104).

13. The connecting terminal according to claim 12, characterized in that: The groove is arranged on the ball planting part, the depth of the groove is 0.2-0.6 of the thickness of the ball planting part, and the center position deviates 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 the groove is 1 / 3-2 / 3 of the diameter of the ball implanting part.

15. The connecting terminal according to claim 11, characterized in that: A solder resist structure is provided at the intersection of the ball implanting portion and the base portion (101).

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

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

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