Sandwich connector and grounding terminal thereof

Abstract

The utility model relates to the technical field of connector, specifically relates to interlayer connector and its ground terminal, the ground terminal of interlayer connector includes elastic sheet section, and the head of elastic sheet section is equipped with the contact part for with the corresponding terminal of adaptive connector and passes through the contact, and the tail end is connected with the welding pin for with circuit board welding, and the elastic sheet section is equipped with the through hole along its thickness direction, and the through hole extends along the length direction of elastic sheet section, and the part of through hole is bent when the interlayer connector and the adaptive connector are inserted and make the elastic sheet section elastic deformation to the thickness direction side thereof. Utilize the through hole to improve the elastic deformation ability of ground terminal, avoid the contact force of ground terminal insertion too big, and the convenient insertion operation.

Description

Technical Field

[0001] This utility model relates to the field of connector technology, specifically to a mezzanine connector and its grounding terminal. Background Technology

[0002] BGA high-speed mezzanine connectors are commonly used for high-speed data transmission between circuit boards. Currently, the transmission rate of BGA high-speed mezzanine connectors is becoming increasingly higher with market demand, which places higher technical requirements on mezzanine connectors.

[0003] A mezzanine connector typically includes an insulating body with a plurality of signal terminals and a plurality of ground terminals evenly arrayed on the insulating body. The ends of the signal terminals and ground terminals are provided with solder pins, each with a solder ball. These solder balls allow for soldering and fixing to the corresponding circuit board, establishing electrical connection with the corresponding circuit. Signal transmission between circuit boards can be achieved through the self-mating of two mezzanine connectors. A basic structure of existing mezzanine connectors can be found in a connector disclosed in Chinese Utility Model Patent No. CN215869858U. This connector has multiple rows of contacts distributed on its insulating body. These contacts are divided into signal contacts and ground contacts, i.e., signal terminals and ground terminals. The signal and ground contacts have the same structure. Signal and ground contacts in the same row are spaced apart, forming pairs of signal contacts and pairs of ground contacts. A ground terminal pair is provided between adjacent pairs of signal terminals, providing shielding and reducing crosstalk. Both the signal terminals and the ground terminals are spring-loaded structures, including a contact area, a straight area, and a pin area. After the two mezzanine connectors are self-adjusted, the contact areas of the terminal heads form conductive contact and undergo elastic deformation to maintain tight contact.

[0004] For higher-speed connectors, the signal terminals can cause significant interference between each other, resulting in poor high-frequency performance. To achieve higher speeds, shielding requirements are more stringent. To improve shielding effectiveness, some mezzanine connectors have ground terminals that are much wider than signal terminals. However, this results in a larger ground terminal width, making it less prone to elastic deformation during connector mating. Consequently, the ground terminal generates greater resistance during connector mating, making the insertion and removal of the connector more difficult. Utility Model Content

[0005] The purpose of this utility model is to provide a grounding terminal for a mezzanine connector, so as to solve the problem that the current mezzanine connectors with wider grounding terminals to improve shielding effect are more difficult to operate when plugging and unplugging; the purpose of this utility model is also to provide a mezzanine connector to solve the above problems.

[0006] The technical solution for the grounding terminal of the mezzanine connector of this utility model is as follows:

[0007] The grounding terminal of the mezzanine connector includes a spring segment. The head of the spring segment has a contact portion for making conductive contact with the corresponding terminal of the adapter connector, and the tail end is connected to a soldering pin for soldering to a circuit board. The spring segment has a through hole extending along its thickness direction, and the through hole extends along the length direction of the spring segment. When the mezzanine connector and the adapter connector are mated and the spring segment is elastically deformed towards its thickness direction, the part where the through hole is located bends.

[0008] Furthermore, there are two or more through holes, and each through hole is spaced apart along the width direction of the spring segment. The projections of each through hole in the width direction of the spring segment overlap, and the portions of the spring segment with each through hole are symmetrically arranged about the centerline in the width direction of the spring segment.

[0009] Furthermore, the through hole is a rectangular hole, and the length and width directions of the rectangular hole are consistent with the length and width directions of the spring segment.

[0010] Furthermore, the head and tail directions of the spring segment are along its length, and the contact portion and the through hole are spaced apart along the length direction of the spring segment.

[0011] Furthermore, the side edge of the tail portion of the spring segment is provided with an interference protrusion in the width direction. The interference protrusion is used for interference mounting into the insulator of the interlayer connector. The head and tail directions of the spring segment are in the length direction. The through hole and the interference protrusion are spaced apart along the length direction of the spring segment.

[0012] Furthermore, the grounding terminal has at least two welding pins along the width of the spring segment.

[0013] Beneficial effects: This utility model improves the grounding terminal of existing mezzanine connectors by providing a through hole along its thickness direction on the spring segment of the grounding terminal. The tail end of the grounding terminal is fixed to the circuit board by soldering pins. The spring segment can extend relative to the soldering pins and can elastically deform. When this mezzanine connector is mated with a compatible mezzanine connector, the grounding terminals of the two mezzanine connectors make relative pressing contact, and the contact parts of the grounding terminals make abutting contact, causing the spring segment to elastically deform towards the thickness direction. Because the spring segment is provided with a through hole, the deformation capacity at the through hole is better, so the part of the spring segment with the through hole is easy to bend to achieve elastic pressing contact of the grounding terminal. The through hole improves the elastic deformation capacity of the grounding terminal, avoids excessive contact force when the grounding terminal is mated, and facilitates mating operation. Conversely, the same applies when the two mezzanine connectors are separated. When the grounding terminal is set to be wider to improve the shielding effect, excessive insertion and extraction force can also be avoided, making the connector mating and extraction operation easier. Moreover, it is not easy to scratch the grounding terminal, and the force on the mezzanine connector during mating and extraction can be smaller, making the mezzanine connector less prone to deformation and damage.

[0014] The technical solution of this utility model's sandwich connector is:

[0015] A mezzanine connector includes an insulator and signal terminals and ground terminals mounted in the insulator. The width of the ground terminal is greater than the width of the signal terminal. The ground terminal includes a spring segment. The head of the spring segment has a contact portion for making conductive contact with a corresponding terminal of the adapter connector, and the tail end is connected to a soldering pin for soldering to a circuit board. The spring segment has a through hole extending along its thickness direction and the through hole extends along the length direction of the spring segment. When the mezzanine connector is mated with the adapter connector and the spring segment is elastically deformed towards its thickness direction, the part where the through hole is located bends.

[0016] Furthermore, there are two or more through holes, and each through hole is spaced apart along the width direction of the spring segment. The projections of each through hole in the width direction of the spring segment overlap, and the portions of the spring segment with each through hole are symmetrically arranged about the centerline in the width direction of the spring segment.

[0017] Furthermore, the through hole is a rectangular hole, and the length and width directions of the rectangular hole are consistent with the length and width directions of the spring segment.

[0018] Furthermore, the head and tail directions of the spring segment are along its length, and the contact portion and the through hole are spaced apart along the length direction of the spring segment.

[0019] Furthermore, the side edge of the tail portion of the spring segment is provided with an interference protrusion in the width direction. The interference protrusion is used for interference mounting into the insulator of the interlayer connector. The head and tail directions of the spring segment are in the length direction. The through hole and the interference protrusion are spaced apart along the length direction of the spring segment.

[0020] Furthermore, the grounding terminal has at least two welding pins along the width of the spring segment.

[0021] Furthermore, the width of the grounding terminal is more than twice the width of the signal terminal.

[0022] Furthermore, the signal terminals are arranged in pairs, and each terminal in the insulator has two or more rows. A grounding terminal is provided between two adjacent pairs of signal terminals in the same row. The midpoint of the distance between any pair of signal terminals in one row of two adjacent rows corresponds to the center position of the width direction of the adjacent grounding terminal in the other row in the spacing direction of the two rows of terminals.

[0023] Furthermore, the distance between the two soldering pins at the end of the grounding terminal is greater than the distance between the soldering pin at the end of the signal terminal and the soldering pin at the end of the adjacent grounding terminal.

[0024] Beneficial effects: This utility model improves the grounding terminal of existing mezzanine connectors by providing a through hole along its thickness direction on the spring segment of the grounding terminal. The tail end of the grounding terminal is fixed to the circuit board by soldering pins. The spring segment can extend relative to the soldering pins and can elastically deform. When this mezzanine connector is mated with a compatible mezzanine connector, the grounding terminals of the two mezzanine connectors make relative pressing contact, and the contact parts of the grounding terminals make abutting contact, causing the spring segment to elastically deform towards the thickness direction. Because the spring segment is provided with a through hole, the deformation capacity at the through hole is better, so the part of the spring segment with the through hole is easy to bend to achieve elastic pressing contact of the grounding terminal. The through hole improves the elastic deformation capacity of the grounding terminal, avoids excessive contact force when the grounding terminal is mated, and facilitates mating operation. Conversely, the same applies when the two mezzanine connectors are separated. When the grounding terminal is set to be wider to improve the shielding effect, excessive insertion and extraction force can also be avoided, making the connector mating and extraction operation easier. Moreover, it is not easy to scratch the grounding terminal, and the force on the mezzanine connector during mating and extraction can be smaller, making the mezzanine connector less prone to deformation and damage. Attached Figure Description

[0025] Figure 1 This is a perspective view of the mating end side of an embodiment of the sandwich connector of this utility model.

[0026] Figure 2 This is a three-dimensional schematic diagram of the fixed end side of an embodiment of the sandwich connector of this utility model.

[0027] Figure 3 This is a front view of the mating end side of an embodiment of the interlayer connector of this utility model;

[0028] Figure 4 This is a front view of the fixed end side of an embodiment of the interlayer connector of this utility model;

[0029] Figure 5 This is a three-dimensional schematic diagram of the arrangement of signal terminals and grounding terminals in an embodiment of the mezzanine connector of this utility model;

[0030] Figure 6 This is a front view of the arrangement structure of the signal terminals and ground terminals of an embodiment of the mezzanine connector of this utility model;

[0031] Figure 7 This is a schematic diagram of one side of the grounding terminal in the width direction of an embodiment of the mezzanine connector of this utility model;

[0032] Figure 8 This is a schematic cross-sectional view of the terminal mounting structure on the insulator of an embodiment of the sandwich connector of this utility model;

[0033] Figure 9 for Figure 8 A partial schematic diagram;

[0034] Figure 10 for Figure 8 A schematic diagram of the insulator in the diagram;

[0035] Figure 11 for Figure 10 A partial schematic diagram.

[0036] In the diagram: 1. Insulator; 11. Signal terminal mounting slot; 12. Grounding terminal mounting slot; 2. Signal terminal; 3. Grounding terminal; 31. Contact part; 32. Straight part; 33. Solder pin; 34. Through hole; 35. First interference protrusion; 36. Notch; 37. Second interference protrusion; 4. Solder ball. Detailed Implementation

[0037] The basic concept of this interlayer connector is to provide a through hole in the elastic segment of the grounding terminal along its thickness direction. The through hole improves the elastic deformation capability of the grounding terminal. When the grounding terminal is made relatively wide in order to improve the shielding effect, it can also avoid excessive insertion and extraction force and facilitate the insertion and extraction operation of the connector.

[0038] The present invention will be described in detail below with reference to specific embodiments.

[0039] Embodiments of the sandwich connector of this utility model:

[0040] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the mezzanine connector is a BGA high-speed mezzanine connector. The connector includes an insulator 1 and terminals fixedly installed in the insulator 1. The terminals include signal terminals 2 and ground terminals 3, and there are multiple signal terminals 2 and ground terminals 3. The terminals are made of sheet material and have thickness, width and length. The length direction of the terminals is consistent with the mating direction of the mezzanine connector. One end of the mezzanine connector is a mating end for mating with a compatible mezzanine connector, and the other end is a fixing end for fixed connection with the circuit board. The terminals are installed in the insulator 1 along the mating direction of the connector. The two mezzanine connectors are interconnected after self-mating through the mating ends.

[0041] Signal terminals 2 are arranged in pairs, with two signal terminals 2 forming a pair. The terminals are arranged in multiple rows, with multiple pairs of signal terminals 2 in each row. A grounding terminal 3 is provided between any two adjacent pairs of signal terminals 2. The width direction of the grounding terminal 3 is consistent with the width direction of the signal terminal 2, the width direction of the terminal is consistent with the arrangement direction of the terminals in the same row, and the thickness direction of the terminal is consistent with the spacing direction of each row of terminals. The projections of the terminals in the same row overlap in their parallel direction. Each terminal is a spring-loaded structure, with one end for elastically pressing against the corresponding terminal of the adapter connector, and the other end equipped with a solder ball 4 for soldering and fixing to the corresponding circuit board. When two mezzanine connectors self-mating, the terminal of one connector is inserted into the thickness direction side of the corresponding terminal of the other connector, and the terminals press against each other, causing elastic deformation.

[0042] To enhance shielding and increase connector transmission rate, the width of the ground terminal 3 of the mezzanine connector is greater than the width of the signal terminal 2, resulting in a larger spacing between adjacent pairs of signal terminals 2 to reduce crosstalk.

[0043] Because the grounding terminal 3 is relatively wide, its overall rigidity is greater than that of the narrower signal terminal 2, making it less prone to elastic deformation. This results in greater resistance from deformation of the grounding terminal 3 during connector insertion or removal, making operation more laborious. Therefore, in this embodiment, a through-hole 34 is provided on the elastic segment of the grounding terminal 3. The through-hole 34 extends through the thickness direction of the elastic segment and along its length. When the interlayer connector and the adapter connector are inserted, causing the elastic segment to elastically deform towards its thickness direction, the portion containing the through-hole 34 bends. When the mezzanine connector is mated with a compatible mezzanine connector, the grounding terminals 3 of the two mezzanine connectors press against each other, and the contact portion 31 of the grounding terminal 3 makes abutting contact, causing the spring segment to elastically deform towards the thickness direction. Since the spring segment is provided with a through hole 34, the deformation capacity at the through hole 34 is better. Therefore, the part of the spring segment where the through hole 34 is located is easy to bend to achieve elastic pressing contact of the grounding terminal 3. The through hole 34 improves the elastic deformation capacity of the grounding terminal 3, avoids excessive contact force when the grounding terminal 3 is mated, and facilitates mating operation. Conversely, the same applies when the two mezzanine connectors are separated. When the grounding terminal 3 is set to be relatively wide in order to improve the shielding effect, it can avoid excessive insertion and extraction force, facilitate connector insertion and extraction operation, and is not easy to scratch the grounding terminal 3. The force on the mezzanine connector during insertion and extraction can also be smaller, and the mezzanine connector is not easy to deform or be damaged.

[0044] Two or more through holes 34 are provided. In this embodiment, there are three through holes 34 on the same grounding terminal 3. Each through hole 34 is spaced apart along the width direction of the elastic segment, and the projections of each through hole 34 on the width direction of the elastic segment overlap. The portions of the elastic segment with each through hole 34 are symmetrically arranged about the centerline of the elastic segment in the width direction. By using multiple through holes 34, the structural strength and shielding effect can be guaranteed while ensuring the elastic deformation capability of the through hole 34 area. Moreover, the symmetrical arrangement of each through hole ensures uniform stress and avoids the grounding terminal from tilting due to uneven elasticity at the through hole when the connector is plugged in. In other embodiments, only one through hole with a sufficiently large opening area can be provided.

[0045] All through holes 34 are positioned symmetrically along the length of the elastic segment. Each through hole 34 is rectangular, with the width of the middle through hole 34 greater than the widths of the two side through holes 34. All through holes 34 are of equal length. The middle through hole is symmetrical about the centerline of the elastic segment's width, as are the two side through holes. The connecting ribs formed between adjacent through holes have the same width. The width of the portion of the elastic segment located on opposite sides of the two side through holes is greater than the width of the connecting ribs between the two through holes. The four corners of the rectangular holes are chamfered. The length and width directions of the rectangular holes are consistent with the length and width directions of the elastic segment. The length of the through hole 34 is much greater than its width, which improves the elastic deformation capacity of the through hole 34. In other embodiments, the through holes can also be oblong or relatively flat elliptical holes.

[0046] Combination Figure 6 , Figure 7 The spring segment of the grounding terminal 3 includes a contact portion 31 and a straight portion 32. The contact portion 31 is a bent structure and is located at the head of the spring segment, which is the head end of the grounding terminal 3. The tail end of the spring segment is connected to a soldering pin 33 for soldering to the circuit board. The soldering pin 33 is bent relative to the spring segment and integrally connected. A stress-reducing groove is provided at the included angle of the connection. A solder ball 4 is disposed on the soldering pin. The tail end of the grounding terminal 3 is soldered and fixed to the circuit board through the soldering pin 33 and the solder ball 4. The spring segment is overhanging relative to the soldering pin 33 and can be elastically deformed.

[0047] A through hole 34 is provided in the straight section 32, with the head and tail directions of the spring segment being the length direction. The contact portion 31 and the through hole 34 are spaced apart along the length direction of the spring segment. After the two interlayer connectors are mated, the contact portion 31 of the grounding terminal 3 makes a pressing contact, and the through hole 34 will not make direct contact, ensuring reliable contact.

[0048] The grounding terminal 3 has at least two solder pins 33 along the width of the spring segment; in this embodiment, there are two. The two solder pins 33 can be soldered to the corresponding circuit board, which can replace the conventional two narrow terminals for grounding without changing the structure of the circuit board. In other embodiments, if the grounding point on the circuit board is changed, a grounding terminal can also be provided with only one solder pin.

[0049] The width of grounding terminal 3 is more than twice the width of signal terminal 2. Using a wide grounding terminal instead of the conventional two spaced narrow grounding terminals improves shielding effectiveness and reduces crosstalk between signal terminal pairs. The two grounding solder pins 33 of grounding terminal 3 share a single spring segment. Compared to the conventional form where two grounding solder pins belong to two separate narrow grounding terminals, this reduces the number of components and simplifies the difficulty and time of inserting the terminal into the insulator.

[0050] For the same row of terminals, ground terminals 3 and signal terminal pairs are arranged adjacently and alternately in the side-by-side direction. For two adjacent rows of terminals, the midpoint of the spacing between any pair of signal terminals 2 in one row corresponds to the center position of the adjacent ground terminal 3 in the width direction in the other row in the spacing direction of the two rows of terminals. The center line of the side-by-side direction of any pair of signal terminals in any row coincides with the center line of the width direction of the adjacent ground terminal 3 in the adjacent row. The center line of the width direction of any ground terminal 3 in any row is aligned with the center line of the side-by-side direction of the adjacent differential signal terminal pair in the adjacent row. Replacing two conventional narrow ground terminals with small spacing between them with a single, wider ground terminal reduces crosstalk between differential signal terminal pairs and also reduces crosstalk between signal terminal pairs in rows, improving shielding effectiveness and allowing for smaller spacing between terminals. This creates good signal shielding between signal terminal pairs, reduces crosstalk during signal transmission, and improves the high-speed transmission rate of connector products.

[0051] The distance between the two soldering pins 33 at the tail end of the grounding terminal 3 is greater than the distance between the soldering pin at the tail end of the signal terminal 2 and the soldering pin 33 at the tail end of the adjacent grounding terminal 3. This makes the soldering pins 33 of the grounding terminal 3 closer to the soldering pins of the signal terminal 2, which can shorten the return path and improve the shielding effect.

[0052] The side edge of the spring segment of the grounding terminal 3 in the width direction of the tail is provided with an interference protrusion. The interference protrusion is used to be interference-fitted into the insulator 1 of the interlayer connector. The through hole 34 and the interference protrusion are spaced apart along the length direction of the spring segment to avoid the through hole 34 affecting the stability of the interference fit between the tail of the spring segment and the insulator 1.

[0053] The spring segment of the grounding terminal 3 has interference-fit protrusions on both sides of its tail width direction. At least two interference-fit protrusions are provided on the same side edge along the length of the spring segment; in this embodiment, there are two: a first interference-fit protrusion 35 and a second interference-fit protrusion 37. The second interference-fit protrusion 37 is closer to the solder pin 33 than the first interference-fit protrusion 35. The protrusion height of each interference-fit protrusion on the same side edge gradually increases from beginning to end of the spring segment; that is, the protrusion height of the second interference-fit protrusion 37 is greater than that of the first interference-fit protrusion 35. The progressively varying height of the interference-fit protrusions reduces the insertion force when the terminal is interference-fitted to the corresponding insulator 1. A notch 36 is formed between the first interference-fit protrusion 35 and the second interference-fit protrusion 37, providing space for the deformation of the plastic insulator 1 under the pressure of the interference-fit protrusions and accommodating plastic debris, thus improving installation stability.

[0054] The signal terminal 2 and the ground terminal 3 have the same basic structure, differing only in width and the number of solder pins. The soldering and fixing methods for each terminal to the circuit board, as well as the mating contact methods with the adapter connector, are also identical. The specific structure of the signal terminals will not be described in detail here.

[0055] Combination Figure 8 , Figure 9 , Figure 10 , Figure 11 The insulator 1 has a signal terminal mounting slot 11 for interference-fitting signal terminals 2 and a grounding terminal mounting slot 12 for interference-fitting grounding terminals 3. The width of the grounding terminal mounting slot 12 is greater than the width of the signal terminal mounting slot 11. The grounding terminal 3 is inserted into the grounding terminal mounting slot 12 from the side of the insulator 1 located at the connector fixed end. The slot opening of the grounding terminal mounting slot 12 at the fixed end has an outer-larger-inner-smaller structure to accommodate interference-fitting protrusions with different protrusion heights, ensuring reliable interference fit while avoiding excessive insertion force during the insertion process. This ensures the feasibility of automated terminal installation on the insulator 1. At the same time, the use of a larger grounding terminal mounting slot 12 makes the wall thickness of the mounting slots of the insulator 1 as uniform as possible, which also improves the structural stability of the insulator 1. After stress release, the insulator will not warp.

[0056] An embodiment of the grounding terminal of the mezzanine connector of this utility model:

[0057] The grounding terminal of the mezzanine connector in this embodiment has the same structure as the grounding terminal of the mezzanine connector in the above embodiment, and will not be described again here.

[0058] Finally, it should be noted that the above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A grounding terminal of a mezzanine connector, comprising a spring segment, wherein the spring segment head is provided with a contact portion (31) for making conductive contact with a corresponding terminal of a mating connector, and the tail end is connected with a soldering pin (33) for soldering to a circuit board, characterized in that, The spring segment has a through hole (34) extending along its thickness direction, and the through hole extends along the length direction of the spring segment. When the interlayer connector and the adapter connector are inserted and the spring segment is elastically deformed toward its thickness direction, the part where the through hole is located bends.

2. The grounding terminal of the mezzanine connector according to claim 1, characterized in that, There are two or more through holes (34), and each through hole (34) is spaced apart along the width direction of the spring segment. The projections of each through hole (34) in the width direction of the spring segment overlap, and the portion of the spring segment with each through hole (34) is symmetrically arranged about the centerline in the width direction of the spring segment.

3. The grounding terminal of the mezzanine connector according to claim 1 or 2, characterized in that, The through hole (34) is a rectangular hole, and the length and width directions of the rectangular hole are consistent with the length and width directions of the spring segment.

4. The grounding terminal of the mezzanine connector according to claim 1 or 2, characterized in that, The head and tail directions of the bullet segment are along the length direction, and the contact part (31) and the through hole (34) are spaced apart along the length direction of the bullet segment.

5. The grounding terminal of the mezzanine connector according to claim 1 or 2, characterized in that, The side edge of the tail of the spring segment is provided with an interference protrusion in the width direction. The interference protrusion is used to be interference-fitted into the insulator (1) of the interlayer connector. The head and tail directions of the spring segment are in the length direction. The through hole (34) and the interference protrusion are spaced apart along the length direction of the spring segment.

6. The grounding terminal of the mezzanine connector according to claim 1 or 2, characterized in that, The grounding terminal (3) has at least two welding pins (33) along the width direction of the spring segment.

7. A mezzanine connector, comprising an insulator (1) and a signal terminal (2) and a ground terminal (3) mounted in the insulator (1), wherein the width of the ground terminal (3) is greater than the width of the signal terminal (2), characterized in that, The grounding terminal (3) is the grounding terminal of the mezzanine connector as described in any one of claims 1-6.

8. The mezzanine connector according to claim 7, characterized in that, The width of the grounding terminal (3) is more than twice the width of the signal terminal (2).

9. The mezzanine connector according to claim 8, characterized in that, The signal terminals (2) are arranged in pairs. Each terminal in the insulator (1) is provided in two or more rows. A grounding terminal (3) is provided between two adjacent pairs of signal terminals (2) in the same row. The midpoint of the distance between any pair of signal terminals (2) in one row of two adjacent rows corresponds to the center position of the width direction of the adjacent grounding terminal (3) in the other row in the spacing direction of the two rows of terminals.

10. The mezzanine connector according to claim 8, characterized in that, The distance between the two solder pins (33) at the end of the grounding terminal (3) is greater than the distance between the solder pin at the end of the signal terminal (2) and the solder pin at the end of the adjacent grounding terminal (3).

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