A floating plate-to-plate connection device
Patent Information
- Application Number
- CN202522256674.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-24
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-10-24
AI Technical Summary
Existing floating board-to-board connectors suffer from impedance instability and signal transmission instability due to offset in the X, Y, and Z directions after the socket and plug are engaged.
The socket and plug signal terminals are arranged in pairs. The plug signal terminals adopt a U-shaped or inverted U-shaped structure. After the socket and plug signal terminals are engaged, they maintain close contact through elastic deformation, forming a differential signal pair to suppress common-mode noise and maintain the continuity of electrical connection under vibration or slight movement.
It achieves stability and reliability of signal transmission under vibration or slight movement conditions, reduces crosstalk between signals, ensures stable contact resistance, and avoids signal interruption or attenuation due to poor contact.
Smart Images
Figure CN224935111U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of electrical connector technology, and in particular relates to a floating plate to plate connection device. Background Technology
[0002] Floating board-to-board connectors are a type of electromechanical interconnect. Utilizing an internal floating structure, they effectively prevent damage to components on the PCB (such as solder joints and other connector interfaces), particularly eliminating misalignment in the X, Y, and Z directions during PCB installation and assembly. Generally, a floating board-to-board connector consists of one or more terminals with elastic structures connecting a fixed housing and a movable housing, fixed to the PCB. The movable housing can move relative to the fixed housing to address relative positional deviations that occur during connector assembly, which can affect product functionality. However, typical floating board-to-board connectors cannot effectively address the issue of unstable impedance and signal transmission when X, Y, and Z directions shift after the socket and plug are engaged in practical applications. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a floating plate-to-plate connection device that can maintain a stable connection and effectively improve the stability of signal transmission.
[0004] The technical solution adopted in this utility model is as follows: This utility model provides a floating plate-to-plate connection device, comprising: Socket connection board; Plug connector board; A socket connector is disposed on the socket connection plate. The socket connector includes a socket frame and socket signal terminals. The socket frame is movably connected to the socket connection plate. A plurality of the socket signal terminals are arranged in pairs on both sides of the socket frame along the X direction. A plug connector is disposed on the plug connection plate. The plug connector includes a plug frame and plug signal terminals. The plug frame is disposed on the plug connection plate and is used to fix and support the plug signal terminals. A plurality of plug signal terminals are arranged in pairs on both sides of the plug frame along the X direction. The plug signal terminals are provided with plug signal terminal connection parts. The plug signal terminal connection parts are U-shaped or inverted U-shaped structures, so that when one end is fixed, the other end can float horizontally. When the socket connector and the plug connector are engaged, the socket signal terminals and the plug signal terminals make contact with each other in a one-to-one manner, undergoing elastic deformation and mutual compression.
[0005] Preferably, the socket frame has a first fixing groove on each of its two outer sidewalls along the X direction, and a second fixing groove on the inner sidewall corresponding to the first fixing groove. A plurality of first fixing grooves and a plurality of second fixing grooves are arranged along the X direction on the socket frame. The socket frame also has a partition block inside, and the partition block has a first movable groove at a position corresponding to a plurality of second fixing grooves. The first fixing groove, the second fixing groove and the first movable groove located at corresponding positions on the same side of the socket frame form a socket signal terminal installation position, and the socket signal terminal is disposed on the socket signal terminal installation position.
[0006] Preferably, the socket signal terminal includes a socket signal terminal welding part, a socket signal terminal connecting part, and a socket signal terminal contact part. The socket signal terminal welding part is fixed to the socket connecting plate by welding. The socket signal terminal connecting part is disposed in the first fixing groove and the second fixing groove. The socket signal terminal contact part is placed in the first movable groove.
[0007] Preferably, the socket connector further includes a pair of socket power terminals disposed on both ends of the socket frame along the X direction. The socket power terminals include a socket power terminal fixing part and a socket power terminal contact part. The socket power terminal fixing part is provided with a pair of first claws and second claws. The socket power terminal contact part is disposed between the pair of second claws. The socket power terminal contact part and the socket power terminal fixing part are connected to each other through an extension.
[0008] Preferably, the socket frame has a socket power terminal engaging portion on both ends of the X-direction. A second movable groove is provided on the inner wall of the socket connecting plate at the position corresponding to the socket power terminal engaging portion. The socket power terminal fixing portion is provided on the socket power terminal engaging portion, and the socket power terminal engaging portion is provided with a slot that cooperates with the first claw and the second claw. The socket power terminal contact portion is placed in the second movable groove.
[0009] Preferably, the plug signal terminal further includes a plug signal terminal soldering part and a plug signal terminal contact part, and the plug signal terminal soldering part and the plug signal terminal contact part are interconnected through the plug signal terminal connecting part.
[0010] Preferably, the plug frame includes a first plug frame and a second plug frame, wherein the first plug frame is used to fix the soldering part of the plug signal terminal, and the second plug frame is used to fix the contact part of the plug signal terminal.
[0011] Preferably, the first plug frame is fixedly connected to the plug connecting plate, the second plug frame is movably connected to the plug connecting plate, and the second plug frame is located between two pairs of first plug frames. A cavity is provided at one end near the socket connector, and a limiting groove is provided on the two inner sidewalls of the cavity along the X direction. The plug signal terminal contact part is located in the limiting groove.
[0012] Preferably, the plug connector further includes a pair of plug power terminals disposed on both ends of the plug frame along the X direction. The plug power terminals include a plug power terminal fixing part and a plug power terminal contact part. The plug power terminal fixing part and the plug power terminal contact part are connected to each other through a plug power terminal connecting part. After the socket power terminal contact part comes into contact with the plug power terminal contact part, they undergo elastic deformation and squeeze each other.
[0013] Preferably, after the plug connector and the socket connector are fitted together, the separator block is placed in the cavity, the plug signal terminal contact portion in the limiting groove contacts the socket signal terminal contact portion in the first movable groove, and the distance between the socket signal terminal contacts at relative positions along the Y direction of the socket frame is greater than the distance between the plug signal terminal contacts at relative positions along the Y direction of the second plug frame.
[0014] In summary, the beneficial effects of this application are as follows: This invention arranges the socket signal terminals and plug signal terminals in pairs on both sides of the frame along the X direction, and employs a unique U-shaped / inverted U-shaped plug signal terminal connection. The U-shaped structure compensates through its own elastic deformation, ensuring that the socket signal terminals and plug signal terminals always maintain a tight elastic contact and stable mutual compression, achieving horizontal floating of the terminals. This symmetrical layout is beneficial for forming differential signal pairs, effectively suppressing common-mode noise, reducing crosstalk between signals, and providing a good channel for high-speed signal transmission. After the socket signal terminals and plug signal terminals come into contact, they undergo elastic deformation and are always in a state of mutual compression at the contact point. This design ensures stable contact resistance, maintaining the continuity and reliability of the electrical connection even under vibration or slight movement conditions, and effectively solving the problem of signal interruption or attenuation caused by poor contact. Attached Figure Description
[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and these are all within the protection scope of this application.
[0016] Figure 1 Disassembly diagram of the floating plate to plate connection device provided by this utility model when not assembled; Figure 2 A three-dimensional perspective view of the floating plate-to-plate connection device provided by this utility model after assembly; Figure 3 A three-dimensional structural diagram of the plug connector in the floating plate to plate connection device provided by this utility model; Figure 4 A three-dimensional structural diagram of the socket connector in the floating plate-to-plate connection device provided by this utility model; Figure 5 A three-dimensional perspective view of the socket connector and plug connector after being fitted together in the floating plate to plate connection device provided by this utility model; Figure 6 A three-dimensional structural schematic diagram of the socket power terminal in the floating plate to plate connection device provided by this utility model; Figure 7 A cross-sectional view of the state of the plug connector and socket connector before they are engaged in the floating plate to plate connection device provided by this utility model. Figure 8 A cross-sectional view of the state after the plug connector and socket connector are engaged in the floating plate to plate connection device provided by this utility model. Figure 9 A diagram showing the state of the socket power terminal and the plug power terminal after contact in the floating plate to plate connection device provided by this utility model. Figure 10 The floating plate to plate connection device provided by this utility model includes Figure 1 Enlarged view of point A in the middle.
[0017] The components and their numbers shown in the picture: Socket connecting plate 1, plug connecting plate 2, socket frame 3, plug frame 4, socket power terminal 5, socket signal terminal 6, plug power terminal 7, plug signal terminal 8, first welding part 11, first fixing groove 31, second fixing groove 32, partition block 33, first movable groove 331, socket power terminal engaging part 34, limiting part 341, second movable groove 342, first plug frame 41, second plug frame 42, cavity 421, limiting groove 422, heat dissipation groove 423, socket power terminal fixing part 51, first claw 511, notch 512, second claw 513, extension part 52, socket power terminal contact part 53, socket signal terminal welding part 61, socket signal terminal connecting part 62, socket signal terminal contact part 63, plug power terminal fixing part 71, plug power terminal connecting part 72, plug power terminal contact part 73, plug signal terminal welding part 81, plug signal terminal connecting part 82, plug signal terminal contact part 83. Detailed Implementation
[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Unless otherwise specified, embodiments of the present invention and the various features thereof can be combined with each other, all within the protection scope of the present invention. Example 1
[0019] See Figures 1-10 This utility model provides a floating plate to plate connection device including a socket connection plate 1; The system comprises a plug connection plate 2, a socket connector, and a plug connector. The socket connector is mounted on the socket connection plate 1 and includes a socket frame 3 and socket signal terminals 6. The socket frame 3 is movably connected to the socket connection plate 1 and serves to fix and support the socket signal terminals 6. A plurality of socket signal terminals 6 are arranged in pairs on both sides of the socket frame 3 along the X direction. The plug connector is mounted on the plug connection plate 2 and includes a plug frame 4 and plug signal terminals 8. The plug frame 4 is mounted on the plug connection plate 2 and serves to fix and support the socket signal terminals 6. The plug signal terminals 8 serve to fix and support the plug. A plurality of plug signal terminals 8 are arranged in pairs on both sides of the plug frame 4 along the X direction. The socket connector and the plug connector are connected by mating. When the socket connector and the plug connector are connected, both the socket signal terminals 6 and the plug signal terminals 8 are made of elastic material. A plurality of socket signal terminals 6 and a plurality of plug signal terminals 8 are in contact with each other. After the socket signal terminals 6 and the plug signal terminals 8 come into contact, they undergo elastic deformation, so that the socket signal terminals 6 and the plug signal terminals 8 are always in a state of mutual compression at the contact part.
[0020] The socket frame 3 has a first fixing groove 31 on each of its two outer side walls along the X direction, and a second fixing groove 32 on its inner side wall at a position corresponding to the first fixing groove 31. A plurality of first fixing grooves 31 and a plurality of second fixing grooves 32 are arranged along the X direction on the socket frame 3. The socket frame 3 also has a partition block 33 inside, and the partition block 33 has a first movable groove 331 at a position corresponding to a plurality of second fixing grooves 32. The first fixing grooves 31, second fixing grooves 32 and first movable grooves 331 located at corresponding positions on the same side of the socket frame 3 form a socket signal terminal installation station, and the socket signal terminal 6 is installed on the socket signal terminal installation station.
[0021] The socket signal terminal 6 includes a socket signal terminal welding part 61, a socket signal terminal connecting part 62, and a socket signal terminal contact part 63. The socket connecting plate 1 is provided with a first welding part 11. The socket signal terminal welding part 61 is fixed to the first welding part 11 of the socket connecting plate 1 by welding. The socket signal terminal connecting part 62 is disposed in the first fixing groove 31 and the second fixing groove 32. The socket signal terminal contact part 63 is placed in the first movable groove 331, and a first movable gap is provided between the first movable groove 331 and the socket signal terminal contact part 63 to provide space for the elastic deformation of the socket signal terminal contact part 63 after the socket signal terminal 6 and the plug signal terminal 8 come into contact. The socket signal terminal connecting part 62 is respectively fixed in the first fixing groove 31 and the second fixing groove 32, forming a multi-point fixation, which greatly enhances the holding force and vibration and impact resistance of the terminal and prevents the terminal from loosening when plugged in or under force.
[0022] The socket connector also includes a pair of socket power terminals 5 disposed on both ends of the socket frame 3 along the X direction. The socket power terminals 5 are made of elastic material. Each socket power terminal 5 includes a socket power terminal fixing part 51 and a socket power terminal contact part 53. The socket power terminal fixing part 51 is provided with a pair of first claws 511 and second claws 513. The socket power terminal contact part 53 is disposed between the pair of second claws 513. The socket power terminal contact part 53 and the socket power terminal fixing part 51 are connected to each other through an extension part 52. A notch 512 is provided between the second claws 513 and the extension part 52.
[0023] In this embodiment, the socket frame 3 has a socket power terminal engaging portion 34 on both ends of the socket frame 3 along the X direction. A second movable groove 342 is provided on the inner wall of the socket frame 3 at the position corresponding to the socket power terminal engaging portion 34. The socket power terminal fixing portion 62 is provided on the socket power terminal engaging portion 34, and the socket power terminal engaging portion 34 has a groove that cooperates with the first claw 511 and the second claw 513. A limiting portion 341 is provided at the position of the notch 512. The limiting portion 341 is used to cooperate with the notch 512 and restrict the movement of the socket power terminal along the X direction. The first claw 511 and the second claw 513 are used to restrict the movement of the socket power terminal along the Y direction and / or the Z direction. The socket power terminal contact portion 53 is placed in the second movable groove 342. A second movable gap is provided between the end face of the socket power terminal contact portion 53 near the second movable groove 342 and the second movable groove 342.
[0024] The plug signal terminal 8 includes a plug signal terminal soldering part 81, a plug signal terminal connecting part 82, and a plug signal terminal contact part 83. The plug signal terminal soldering part 81 and the plug signal terminal contact part 83 are connected to each other through the plug signal terminal connecting part 82. The plug signal terminal connecting part 82 is U-shaped or inverted U-shaped. This shape allows the remaining end to swing horizontally when either the plug signal terminal soldering part 81 or the plug signal terminal contact part 83 is fixed, while maintaining stable contact with the socket signal terminal contact part 63.
[0025] The plug frame 4 includes a first plug frame 41 and a second plug frame 42. The first plug frame 41 is used to fix the plug signal terminal soldering part 81, and the second plug frame 42 is used to fix the plug signal terminal contact part 83.
[0026] The first plug frame 41 is fixedly connected to the plug connecting plate 2, and the second plug frame 42 is movably connected to the plug connecting plate 2. Shaking the second plug frame 42 will simultaneously shake all the fixed plug signal terminal contacts 83. The second plug frame 42 is located between two pairs of first plug frames 41, and has a cavity 421 at one end near the socket connector. The cavity 421 has limiting grooves 422 on its two inner sidewalls along the X direction. The plug signal terminal contacts 83 are located in the limiting grooves 422, with the end of the plug signal terminal contacts 83 closest to the limiting grooves 422. The surface abuts against the limiting groove 422, ensuring that the socket signal terminal contact 63 can better undergo elastic deformation during the contact between the socket signal terminal contact 63 and the plug signal terminal contact 83, and that they are always in a state of mutual compression on the contact line, ensuring that there will be no contact interruption when the two connectors shake in the X direction, thus improving the stability of the contact. The plug connector adopts a split design with the first plug frame 41 fixed and the second plug frame 42 movable. The second plug frame 42 is movable and fixed to all the plug signal terminal contacts 83, so that shaking the second plug frame 42 can cause all the contact ends to float together. This design enables collective synchronous floating, ensuring the consistency of compensation for all signal terminals. A heat dissipation groove 423 is also provided on the end face of the limiting groove 422 away from the plug signal terminal contact part 83. The heat dissipation groove 423 is connected to the limiting groove 422. The width of the heat dissipation groove 423 is smaller than the width of the limiting groove 422. This design not only ensures the stable contact between the plug signal terminal contact part 83 and the limiting groove 422, but also enables the connection between the plug signal terminal contact part 83 and the heat dissipation groove 423 at the non-contact position, thereby improving the heat dissipation of the device.
[0027] The plug connector also includes a pair of plug power terminals 7 disposed on both ends of the plug frame 4 along the X direction. Each plug power terminal 7 includes a plug power terminal fixing part 71 and a plug power terminal contact part 73. The plug power terminal fixing part 71 and the plug power terminal contact part 73 are connected to each other through a plug power terminal connecting part 72. After the socket power terminal contact part 73 contacts the plug power terminal contact part 53, it undergoes elastic deformation, so that the socket power terminal and the plug power terminal are always in a state of mutual compression at the contact part.
[0028] In this embodiment, after the plug connector and socket connector are engaged, the separator block 33 is placed inside the cavity 421. The plug signal terminal contact portion 83 in the limiting groove 422 contacts the socket signal terminal contact portion 63 in the first movable groove 331. The socket signal terminal contact portion 63 undergoes elastic deformation, reducing the first movable gap. After the plug connector and socket connector are fully engaged, the middle position of the plug signal terminal contact portion 83 in the Z direction contacts the socket signal terminal contact portion 63, providing sufficient contact margin when the two connectors shake in the Z direction. This ensures that the socket signal terminal 6 and the plug type terminal 8 maintain effective contact even when the connector floats in the Z direction. The socket power terminal 5 and the plug power terminal 7 contact each other, and the socket power terminal contact portion 53 undergoes elastic deformation. The second movable gap is reduced, and the horizontal distance between the two socket signal terminal contact portions 63 positioned relative to each other along the Y direction of the socket frame 3 is greater than the distance between the two plug signal terminal contact portions 83 positioned relative to each other along the Y direction of the second plug frame 42. This ensures that an interaction force is generated on the contact surface after the socket signal terminal 6 and the plug signal terminal 8 come into contact, allowing the socket signal terminal contact portion 63 to undergo better elastic deformation, improving the stability of the contact between the socket signal terminal and the plug signal terminal, and effectively avoiding the problem of insufficient signal transmission stability when the socket connector and the plug connector shake. The separator block 33 cooperates with the cavity 421 on the second plug frame 42 to form a floating guide and limit mechanism. Along the Y direction, the distance between the socket signal terminal contact portions is greater than the distance between the plug signal terminal contact portions. This is an interference design that ensures the generation of positive contact pressure. When the two are fitted together, this dimensional difference will force the socket signal terminal contact portion 63 to elastically deform, thereby generating a continuous and reliable contact force and ensuring the stability of signal interaction.
[0029] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.
Claims
1. A floating plate-to-plate connection device, characterized in that, include: Socket connection board; Plug connector board; A socket connector is disposed on the socket connection plate. The socket connector includes a socket frame and socket signal terminals. The socket frame is movably connected to the socket connection plate. A plurality of the socket signal terminals are arranged in pairs on both sides of the socket frame along the X direction. A plug connector is disposed on the plug connection plate. The plug connector includes a plug frame and plug signal terminals. The plug frame is disposed on the plug connection plate and is used to fix and support the plug signal terminals. A plurality of plug signal terminals are arranged in pairs on both sides of the plug frame along the X direction. The plug signal terminals are provided with plug signal terminal connection parts. The plug signal terminal connection parts are U-shaped or inverted U-shaped structures, so that when one end is fixed, the other end can float horizontally. When the socket connector and the plug connector are engaged, the socket signal terminals and the plug signal terminals make contact with each other in a one-to-one manner, undergoing elastic deformation and mutual compression.
2. The floating plate to plate connecting device according to claim 1, characterized in that, The socket frame has a first fixing groove on each of its two outer side walls along the X direction, and a second fixing groove on the inner side wall corresponding to the first fixing groove. A plurality of first fixing grooves and a plurality of second fixing grooves are arranged along the X direction on the socket frame. The socket frame also has a partition block inside, and the partition block has a first movable groove at a position corresponding to a plurality of second fixing grooves. The first fixing groove, the second fixing groove and the first movable groove located at corresponding positions on the same side of the socket frame form a socket signal terminal installation position, and the socket signal terminal is installed on the socket signal terminal installation position.
3. The floating plate-to-plate connecting device according to claim 2, characterized in that, The socket signal terminal includes a socket signal terminal welding part, a socket signal terminal connecting part, and a socket signal terminal contact part. The socket signal terminal welding part is fixed to the socket connecting plate by welding. The socket signal terminal connecting part is disposed in the first fixed groove and the second fixed groove. The socket signal terminal contact part is placed in the first movable groove.
4. The floating plate to plate connecting device according to claim 3, characterized in that, The socket connector further includes a pair of socket power terminals disposed on both ends of the socket frame along the X direction. The socket power terminals include a socket power terminal fixing part and a socket power terminal contact part. The socket power terminal fixing part is provided with a pair of first claws and second claws. The socket power terminal contact part is disposed between the pair of second claws. The socket power terminal contact part and the socket power terminal fixing part are connected to each other through an extension part.
5. The floating plate-to-plate connecting device according to claim 4, characterized in that, The socket frame has a socket power terminal engaging portion on both ends of the X-direction. A second movable groove is provided on the inner wall of the socket connecting plate at the position corresponding to the socket power terminal engaging portion. The socket power terminal fixing portion is provided on the socket power terminal engaging portion, and the socket power terminal engaging portion is provided with a slot that cooperates with the first claw and the second claw. The socket power terminal contact portion is placed in the second movable groove.
6. The floating plate-to-plate connecting device according to claim 4, characterized in that, The plug signal terminal also includes a plug signal terminal soldering part and a plug signal terminal contact part, which are interconnected through the plug signal terminal connecting part.
7. The floating plate-to-plate connecting device according to claim 6, characterized in that, The plug frame includes a first plug frame and a second plug frame. The first plug frame is used to fix the soldering part of the plug signal terminal, and the second plug frame is used to fix the contact part of the plug signal terminal.
8. The floating plate-to-plate connecting device according to claim 7, characterized in that, The first plug frame is fixedly connected to the plug connecting plate, the second plug frame is movably connected to the plug connecting plate, and the second plug frame is located between two pairs of first plug frames. A cavity is provided at one end near the socket connector. Limiting grooves are provided on the two inner sidewalls of the cavity along the X direction, and the plug signal terminal contact part is located in the limiting groove.
9. The floating plate-to-plate connecting device according to claim 8, characterized in that, The plug connector also includes a pair of plug power terminals disposed on both ends of the plug frame along the X direction. Each plug power terminal includes a plug power terminal fixing part and a plug power terminal contact part. The plug power terminal fixing part and the plug power terminal contact part are connected to each other through a plug power terminal connecting part. After the socket power terminal contact part comes into contact with the plug power terminal contact part, they undergo elastic deformation and squeeze each other.
10. The floating plate to plate connecting device according to claim 8, characterized in that, After the plug connector and the socket connector are engaged, the separator block is placed in the cavity. The plug signal terminal contact portion in the limiting groove contacts the socket signal terminal contact portion in the first movable groove. The distance between the socket signal terminal contacts at relative positions along the Y direction of the socket frame is greater than the distance between the plug signal terminal contacts at relative positions along the Y direction of the second plug frame.