CN116931672A - Switching unit, switching module and electronic equipment - Google Patents

Abstract

A switching unit, a switching module and an electronic device. The switching unit comprises a bracket structure and a plug-in structure arranged on the bracket structure; the support structure is used for expanding the mainboard where the switching unit is positioned and can be connected with the plug-in card; the plug-in structure comprises a single board assembly and a floating assembly; the single board assembly comprises a first single board, a flexible cable and a second single board which are connected in sequence; the first single board is used for connecting the plug-in card; the second single board is used for connecting with the mainboard connector; the second veneer is in floating connection with the support structure through the floating assembly. The switching unit can be applied to a scene of realizing double or multiple plug with a main board, and meets the high tolerance requirement of a connector.

Description

Switching unit, switching module and electronic equipment

Technical Field

The present application relates to the field of communications technologies, and in particular, to a switching unit, a switching module, and an electronic device.

Background

Along with the increasing number of multistage synchronous plugging scenes of server products, higher requirements are put forward on precise matching of modules and connectors. Taking an image processor (graphics processing unit, GPU) as an example, the image processor is usually fixed to a server through a riser, but the motherboard and the image processor are connected through a cable, so that later evolution and operation and maintenance are difficult. When the adapter card is directly connected with the connector on the main board in an opposite-plug manner, a butt-joint tolerance exists. In addition, the dual-plug mode, in which two image processors share one adapter card, increases the docking tolerance. When the mating tolerance exceeds the tolerance capability of the connectors, one of the connectors may be damaged or misppin.

Therefore, the current installation form of the module and the connector cannot meet the high-density plugging requirement of the dual-plug of the board card.

Disclosure of Invention

The application provides a switching unit, a switching module and electronic equipment, which can improve the precision of input/output equipment in a double-plug mode.

In a first aspect, a switching unit is provided, which can perform double-plug with a motherboard connector of a server, so as to implement a multi-stage synchronous plug-in scenario between a plug-in card and a motherboard of the server. The switching unit comprises a support structure and an inserting structure, wherein the support structure is provided with at least two mounting stations, and each mounting station can be correspondingly provided with an inserting card. The plug-in structure can be connected with the plug-in card on one hand and can be plugged with the mainboard connector on the mainboard on the other hand, so that the plug-in card is connected with the mainboard. Specifically, the plug structure includes a single board assembly and a floating assembly. The single board assembly comprises a first single board, a second single board, a flexible cable connected between the first single board and the second single board, and the first single board, the flexible cable and the second single board. The first single board may be fixed to the support structure, and the first single board is used for connecting the card. The second single board may be moved in a first direction relative to the first single board due to the presence of the flexible cable. The second veneer is connected with the support structure in a floating way through the floating assembly. The floating assembly and the second single board have linkage relation, and when the second single board moves along the first direction, the floating assembly can provide floatable support for the second single board. When the plugging structure is plugged with the main board connector, if the second single board and the corresponding main board connector cannot be plugged accurately, the second single board can be adjusted to float relative to the support structure until the second single board and the main board connector can be mutually corresponding in the plugging direction, so that accurate plugging is realized. Especially for some double-plug scenes, when a certain second single board cannot be precisely plugged with a corresponding main board connector, the second single board is adjusted to align the second single board with the corresponding main board connector along the plugging direction, so that precise plugging is realized. The switching unit can be applied to multistage synchronous opposite-plug scenes of plug-in cards and mainboard plugging, meets high tolerance requirements of connectors, and can adapt to more application scenes.

The first single board is provided with a card connector for connecting the card.

In one possible implementation, the fixing bracket may specifically include a fixing bracket and a fixing cross beam. The fixed support is used for installing the card, specifically can install two at least cards. The fixed cross beam is fixed on the fixed support and is provided with a plurality of mounting surfaces. The installation surfaces are in one-to-one correspondence with the plug-in structures, namely, each installation surface corresponds to one plug-in structure. The first veneer is arranged between the mounting surface and the plug-in structure.

Specifically, the float assembly includes a float and at least one elastic set. The floating piece is fixedly connected with the second single plate and can move together with the second single plate. The elastic piece is used for connecting the floating piece and the support structure, the expansion direction of the elastic piece is perpendicular to the inserting direction of the second single board and the main board connector, and the elastic piece can provide a movable and resetting elastic support for the floating piece, so that floating connection between the second single board and the support structure is realized. The number of elastic members may be even in order to control the movement of the floating member. The plugging direction of the second single plate and the main board connector is taken as a reference, even number of elastic pieces are respectively arranged on two sides of the floating piece in a symmetrical mode, one end of each elastic piece is connected with the support structure, the other end of each elastic piece is connected with the floating piece, and the floating piece can be connected with the support assembly in a movable mode. The elastic element may be embodied as a spring, but may also be of other telescopic construction.

In order to facilitate the floating piece to be connected with the elastic piece, a containing groove is formed in the position of the floating piece for connecting with the elastic piece. The extending direction of the accommodating groove is parallel to the extending direction of the elastic piece, so that the elastic piece can be accommodated in the accommodating groove.

In addition, in order to connect the elastic member, a fixing plate is provided on the bracket assembly, one end of the elastic member is fixed to the floating member, and the other end of the elastic member is fixed to the fixing plate. Specifically, along the flexible direction of elastic component, have the clearance between floating piece and the arbitrary fixed plate, the clearance is 1 + -0.15 mm specifically. Such a configuration may enable the float member to move a distance of 2 + -0.3 mm in a first direction relative to the support structure.

In one possible implementation, the support structure may further include a limiting protrusion, and a limiting chute may be disposed on the floating member of the floating assembly. The extending direction of the limiting chute is parallel to the first direction. When the floating piece is installed on the support structure, the limiting protrusion is located in the limiting sliding groove. When the floating piece moves along the first direction relative to the support structure, the limiting sliding groove can slide relative to the limiting protrusion.

The floating piece is provided with a guide pin, and the second veneer is provided with a guide hole, and the guide hole can be used for the guide pin to pass through. The cooperation between the guide pin and the guide hole can act as a guide for the connection between the floating member and the second single plate.

In a second aspect, a switching module is provided, where the switching module specifically includes a card and any one of the switching units in the foregoing technical solutions. The inserting cards are arranged on the support structure and correspond to the inserting structures one by one; and the plug-in card is connected with the first single board between the plug-in card and the plug-in structure which are mutually corresponding. The card here may be any of an image processor, a peripheral component interconnect express (peripheral component interconnect express, PCIe) card, an NVLink protocol enabled card, a mass communications system (high capacity communication system, HCCS) card.

In a third aspect, an electronic device is provided, where the electronic device includes the switching module, and the switching module includes a switching unit. The switching unit is used for realizing the functions of the switching unit provided by the technical scheme.

In some possible implementations, the electronic device may be a server in particular. The electronic device may also include a chassis and a motherboard. The main board and the switching module are arranged in the case, and the switching module is arranged at one end of the case. The switching module can be arranged at the tail end of the case so as not to occupy the front space of the case. The main board is provided with at least one connector set, and one connector set in the at least one connector set is used for correspondingly plugging one switching module. Each connector group comprises two main board connectors corresponding to two second single boards in the switching module, so that each second single board can be matched with one main board connector in a precise plugging manner when a group of mutually corresponding connector groups are plugged with the switching module.

Drawings

Fig. 1a to 1c are schematic structural diagrams of a module connected to a server motherboard in the prior art;

fig. 2a is a schematic structural diagram of a switching module according to an embodiment of the present application;

fig. 2b is a schematic diagram of a connection structure between a switching module and a motherboard connector according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a switching unit according to an embodiment of the present application;

fig. 4a and fig. 4b are schematic structural diagrams of a bracket structure in a switching unit according to an embodiment of the present application;

fig. 4c is a schematic structural diagram of a switching module according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a switching unit according to an embodiment of the present application;

fig. 6a and fig. 6b are schematic structural diagrams of a plugging connection unit and a motherboard connector according to an embodiment of the present application;

fig. 7a to fig. 7d are schematic structural diagrams of a single board assembly in a switching unit according to an embodiment of the present application;

fig. 8 is a schematic partial structure of a switching unit according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a floating member in a switching unit according to an embodiment of the present application;

fig. 10a and fig. 10b are schematic views of a connection structure between a floating member and a fixed plate in a switching unit according to an embodiment of the present application;

fig. 11 is a schematic partial structure of a switching unit according to an embodiment of the present application;

fig. 12a to 12c are schematic partial structures of a switching unit according to an embodiment of the present application;

fig. 13a is a schematic structural diagram of a bracket structure in a switching unit according to an embodiment of the present application;

fig. 13b is a schematic structural diagram of a switching module according to an embodiment of the present application;

fig. 14 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Reference numerals:

1' -server box; 11' -server motherboard; a 12' -server connector; 2' -adapter card;

21' -switching card golden finger; a 3' -module; 4' -cable; 1-a scaffold structure;

11-fixing a bracket; 12-fixing the cross beam; 121-a fixed plate; 2-a plug-in structure;

2 a-a plug structure; 2 b-a plug-in structure; 21-a veneer assembly; 21 a-a veneer assembly;

21 b-a veneer assembly; 211-a first veneer; 212-a second veneer; 2121-guide holes;

213-flexible cable; 22-a floating assembly; 22 a-a floating assembly; 22 b-a floating assembly;

221-a float; 222-an elastic member; 3-a threaded hole; 4-guide pins;

5-a first screw; 6-a second screw; 10-switching units; 20-inserting a card;

20 a-inserting a card; 20 b-card insertion; 100-switching module; 200-a case;

201-a main board; 202-a motherboard connector; 203-a radiator fan.

Detailed Description

Currently, a server generally needs to plug in a patch card to realize connection between a function expansion card and the server. As shown in fig. 1a and 1b, two modules 3 '(two modules 3' are stacked in fig. 1b, only the top module 3 'is shown mounted to the rear side or front side of the server box 1' through the adapter card 2', and the modules 3' are connected to the server main board 11 'through the cables 4'. Along with more and more multistage synchronous opposite-plug scenes (namely, a scene of simultaneously carrying two or more modules 3' and a server main board 11' through one adapter card 2 '), higher requirements are put on the precise matching of the modules and the connectors. The mode of connecting the module and the main board through the cable has the problems of later-stage evolution and difficult operation and maintenance, and cannot meet the requirement of precise matching. For this purpose, as shown in fig. 1c, a server connector 12' may be disposed on the server motherboard 11', the module 3' may be loaded on the adapter card 2', and the connection between the module 3' and the server motherboard 11' may be realized by plugging the adapter card golden finger 21' on the adapter card 2' with the server connector 12 '. This connection requires high structural tolerances. For the double-insertion mode of double golden fingers, two or more modules 3 'share one adapter card 2' to insert two server connectors 12 'on the server main board 11', and the situation of pin misplacement or damage is easy to occur because the abutting tolerance exceeds the tolerance range of the structure.

Based on the above, the switching module provided by the embodiment of the application can realize precise double-plug with the main board connector and can meet the tolerance requirement of a double-plug mode.

The present application will be described in further detail with reference to the accompanying drawings.

The embodiment of the present application provides a switching module 100, and the structure of the switching module 100 can be shown in fig. 2 a. The adapter module 100 includes an adapter unit 10, and the adapter unit 10 can be plugged with two or more cards 20, and fig. 2a illustrates that the adapter module 100 can be plugged with two cards 20. Card 20 includes an image processor, peripheral component interconnect express (peripheral component interconnect express, PCIe) card, a card that meets the NVLink protocol, a high-capacity communication system (high capacity communication system, HCCS) card, an open computing platform (open computing platform, OCP) card, etc. for extending the motherboard functions, and is connected to the motherboard in a plug-in manner by a connector.

The two cards 20 may respectively implement a dual-card connection with two motherboard connectors in an electronic device (e.g., a server) through the switching unit 10, where the motherboard connectors are used to indicate the connector for implementing the coupling between the card and the motherboard. The adapter unit 10 comprises a support structure 1 and two plug-in structures 2. The support structure 1 can be used for bearing and mounting two plug-in cards 20, and the two plug-in structures 2 are used for realizing double plug-in matching between the two plug-in cards 20 and two main board connectors.

As shown in fig. 2b, the adapter module 100 is shown in a state of being plugged with the motherboard connector 202 of the electronic device. Wherein, two inserting cards 20 are installed on the support structure 1 of the switching unit 10, and two inserting structures 2 are arranged on the support structure 1. The two cards 20 may specifically be a card 20a and a card 20b, and the two plugging structures 2 are a plugging structure 2a and a plugging structure 2b, respectively. Two motherboard connectors 202, a motherboard connector 202a and a motherboard connector 202b, respectively, are provided on the motherboard 201. The plugging structure 2a may be plugged with the motherboard connector 202a, and the plugging structure 2b may be plugged with the motherboard connector 202b. For convenience of description, it is assumed that the plugging direction of the plugging structure 2 and the motherboard connector 202 is the third direction Z. The card 20 may be an image processor, but may also be another card such as a flash peripheral component interconnect card, a card supporting NVLink protocol, or a card of a high-capacity communication system. Wherein NVLink isAn on-chip interconnect protocol is provided. It should be appreciated that when the types of cards 20 are different, the type of motherboard connector 202 of the electronic device needs to be matched to the card 20. Motherboard connector 202, such as a Gen-z connector, may be 1C, 2C or other format depending on the size of the Gen-z connector, and is not limited herein. Wherein a 1C format connector serves as a universal basis for all other dimensions. The 1C specification connector supports up to 80W of 12V main power and up to 3.3Vaux power, a set of sideband and management pins, and up to 8 high speed differential pairs. The 2C format connector is based on the 1C format connector and provides up to 16 additional high speed differential pairs.

As shown in fig. 3 for the adapter unit 10, two plug-in structures 2 are provided on the support structure 1. The two plugging structures 2 are arranged along the second direction Y, and the plane of any one plugging structure 2 is parallel to the plane formed by the first direction X and the third direction Y. Here, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other, and form a three-dimensional coordinate system.

Referring to fig. 4a, the structure of the bracket structure 1 is shown in connection with fig. 3, which includes a fixed bracket 11 and a fixed cross member 12. The fixing bracket 11 may be used to mount the badge 20. A connecting bracket 13 can also be arranged at the tail part of the fixed bracket 11. The fixing bracket 11 may be fixed to a cabinet of the electronic apparatus through the connection bracket 13 when the card 20 is mounted. Reference is made to the first direction X, the second direction Y and the third direction Z. Illustratively, the fixing bracket 11 has a first bracket surface b1 and a second bracket surface b2 facing away from each other, the fixing cross member 12 is disposed on the second bracket surface b2, and the fixing cross member 12 is perpendicular to the fixing bracket 11.

Illustratively, the fixed cross member 12 has a length direction parallel to the first direction X, a thickness direction parallel to the second direction Y, and a width direction parallel to the third direction Z. The fixed cross member 12 has a mounting surface a perpendicular to the third direction Z, and the two mounting surfaces a are symmetrically distributed with respect to the fixed cross member 12. As shown in fig. 4b, two mounting spaces T are formed between the two mounting surfaces a of the fixed cross member 12 and the fixed bracket 11. Specifically, the two mounting surfaces a are the mounting surface a1 and the mounting surface a2, respectively. A mounting space T is formed between the mounting surface a1 and the second bracket surface b2 of the fixing bracket 11, and another mounting space T is formed between the mounting surface a2 and the second bracket surface b2 of the fixing bracket 11. Each mounting space T may be used for mounting one or more cards 20. Here, the two installation spaces T are symmetrical with respect to the fixed cross member 12 in the second direction Y. Referring to fig. 4c in addition to fig. 2a, the bracket structure 1 has two installation spaces T, which are exemplified as installation space T1 and installation space T2. The two mounting surfaces a of the fixed cross member 12 are a mounting surface a1 and a mounting surface a2, respectively, the mounting surface a1 corresponds to the mounting space T1, and the mounting surface a2 corresponds to the mounting space T2. The attachment surface a1 is provided with a plug-in structure 2a, and the attachment surface a1 is provided with a plug-in structure 2b. Two cards 20 (exemplified as a card 20a and a card 20 b) are mounted to the bracket structure 1, the card 20a is mounted to the mounting space T1, and the card 20a is connected with the plug-in structure 2 a. The card 20b is mounted to the mounting space T2, and the card 20b is connected with the plug structure 2b. Two cards 20 may be mounted to the two mounting spaces T, respectively. The card 20a and the card 20b are symmetrical with respect to the fixed cross member 12 in the second direction Y. As shown in fig. 5, two sets of plugging structures 2 in the switching unit 10 are in one-to-one correspondence with the two mounting surfaces a, and each set of plugging structures 2 can be used for connecting the corresponding plug card 20 with a motherboard connector (not shown here), so as to realize double-plug connection between the plug card 20 and the motherboard connector. Here, an example is given of a set of the plugging structures 2 mounted to the mounting face a2 of the fixed cross member 12, the plugging structures 2 including the veneer assembly 21 and the floating assembly 22. The board assembly 21 specifically includes a first board 211, a second board 212, and a flexible cable 213 connected between the first board 211 and the second board 212. The on-board assembly 21 is used to implement the connection between the card 20 and the motherboard connector 202 in fig. 2b. The first board 211 is used for connecting the card 20, and the second board 212 is used for connecting the motherboard connector 202. The first board 211 and the second board 212 may be flexible circuit boards, the flexible cable 213 includes wires arranged in sequence, and circuit connection between the first board 211 and the second board 212 may be realized through the flexible cable 213. The first single board 211 is fixed on the mounting surface a2 of the fixed beam 12, and one end of the flexible cable 213 is connected to the first single board 211, and the other end is connected to the second single board 212. The first board 211 is provided with a card connector Q, and the card 20 mounted on the fixing bracket 11 may be connected to the first board 211 through the card connector Q. The second board 212 is provided with a golden finger K, and the second board 212 can be connected with the motherboard connector through the golden finger K. The second board 212 is fixed to the floating assembly 22, and the floating assembly 22 is movably mounted to the fixed beam 12 of the bracket structure 1 along the first direction, and the floating assembly 22 can provide a movable support for the second board 212.

As shown in fig. 6a, the gold finger K of the second single board 212 has a notch region P. Taking the plugging direction (i.e., the third direction Z) of the adapter unit 10 and the motherboard connector 202 on the motherboard 201 as a reference, the golden finger K is disposed at the edge of the side of the second board 212 facing the motherboard connector 202, so as to facilitate plugging of the golden finger K and the motherboard connector 202. The extending direction of the notch region P is parallel to the third direction Z, and the opening of the notch region P is located at the edge of the golden finger K facing the motherboard connector 202. Correspondingly, the motherboard connector 202 has a positioning protrusion B thereon. The positioning protrusion B corresponds to the notch area P on the second board 212 in position and shape, so that the notch P will cooperate with the positioning protrusion B when the golden finger K on the second board 212 is precisely plugged into the motherboard connector 202. That is, when the notch area P is precisely matched with the positioning protrusion B along the first direction X, the golden finger K on the second single board 212 can be precisely plugged with the motherboard connector 202. Therefore, the positioning protrusion B can provide reference and guide for precise plugging of the golden finger K and the motherboard connector 202 based on the general shape and specification of the golden finger K.

As can be seen in fig. 5, the adapter unit 10 has two sets of plugging structures 2, and each set of plugging structures 2 can be used for plugging one motherboard connector 202 correspondingly. In the corresponding plugging structure 2 and the motherboard connector 202, the second board 212 needs to be precisely abutted with the motherboard connector 202, and the notch P on the golden finger K of the second board 212 is matched with the positioning protrusion B on the motherboard connector 202. Referring to fig. 6a together, when the two sets of plugging structures 2 are plugged with the two motherboard connectors 202, if the second board 212 in one set of plugging structures 2 can be precisely plugged with the motherboard connectors 202 along the plugging direction (i.e. the third direction Z), the notch area P of the second board 212 is matched with the positioning protrusion B of the motherboard connector 202. Because of the manufacturing tolerance, as shown in fig. 6B, the second board 212 in the other set of plugging structure 2 may not correspond to the motherboard connector 202 corresponding to the second board 212 along the third direction Z (shown by the dashed line), and the notch area P on the golden finger K cannot be matched with the positioning protrusion B, so that the second board 212 and the motherboard connector 202 cannot be plugged accurately along the third direction Z. The second board 212 is moved relative to the first board 211 along the first direction X (arrow direction), and the golden finger K is adjusted so that the notch area P and the positioning protrusion B correspond to each other along the first direction X (shown by solid line). At this time, the notch area P and the positioning protrusion B may correspond to each other, so as to ensure that the second board 212 can be precisely plugged with the motherboard connector 202. It should be understood that the adjustment direction in fig. 6b is only an example, and that a situation may occur where a reverse adjustment is required.

It is assumed that one of the second boards 212 can be precisely mated with the motherboard connector 202 corresponding to the second board 212, and that the other second board 212 has a mating error along the first direction X with respect to the motherboard connector 202 corresponding to the second board 212, and cannot be precisely plugged. Along the first direction X, the second board 212 that cannot be precisely plugged is adjusted, so that the second board 212 can correspond to the motherboard connector 202 along the third direction Z, that is, the second board 212 can be precisely plugged with the motherboard connector 202. The flexible cable 213 corresponding to the second board 212 that needs to be adjusted can allow such adjustment of the second board 212. During movement of the second plate 212, the floating assembly 22 may move with respect to the fixed beam 12.

In some embodiments, as shown in fig. 7a, the first board 211, the flexible cable 213, and the second board 212 are sequentially arranged along the first direction X. For the veneer assembly 21, the flexible cable 213 may be structurally deformed in the first direction X, thereby changing the distance of the second veneer 212 with respect to the first veneer 211. The flexible cable 213 may be implemented by embedding a flat cable in the flexible substrate, where the flat cable is used to connect the first board 211 and the second board 212. Illustratively, the flexible substrate of the flexible cable 213 may be rubber in particular, and as shown in fig. 7b, the second veneer 212 is moved away from the first veneer 211 in the direction of the arrow parallel to the first direction X, and the flexible cable 213 may be embodied as an elastic extension. As shown in fig. 7c, the second veneer 212 is moved in the direction of the arrow parallel to the first direction X to approach the first veneer 211, and the flexible cable 213 may be embodied as an elastic shortening. Alternatively, the flexible substrate of the flexible cable 213 is a braid, and as shown in fig. 7d, the second veneer 212 moves in the direction of the arrow parallel to the first direction X toward the first veneer 211, and the flexible cable 213 may be embodied as a structural deformation. It should be appreciated that the veneer assembly 21 is capable of adapting to a variety of scenarios when the flexible cable 213 is both lengthened and shortened (as shown in fig. 7b and 7 c). When the flexible cable 213 is only lengthened or only shortened (as shown in fig. 7 d), the veneer assembly 21 can only adapt to the situation that the second veneer 212 is adjusted in the first direction X towards the direction approaching the first veneer 211.

The following explains the floating structure 22 of the adapter unit 10 with reference to fig. 8, and as shown in fig. 8, the floating assembly 22 specifically includes a floating member 221 and an elastic member 222. The floating member 221 is configured to be fixed to the second board 212, and the floating member 221 can move along with the second board 212 when the second board 212 is adjusted. The floating member 221 is fixed to the mounting surface a of the fixed cross member 12 of the bracket structure 1 by an elastic member 222. Specifically, a fixing plate 121 is provided on the mounting surface a of the fixed cross member 12, and an end of the elastic member 222 remote from the floating member 221 may be fixed to the fixing plate 121. Each fixing plate 121 is fixed to the mounting surface a of the fixing cross member 12 by a second screw 6, and the second screw 6 has a gauge M3.

In order to limit the movement of the floating member 221 in the first direction X, in fig. 8, a limiting protrusion M is further provided on the mounting surface a of the fixed cross member 12, and the limiting protrusion M has an elongated shape with a length direction parallel to the first direction X. Correspondingly, the floating member 221 has a limiting chute N, and the limiting chute N is also elongated, and the length direction of the limiting chute N is also parallel to the first direction X. The length of the limiting chute N is greater than the length direction of the limiting protrusion M, so that the limiting protrusion M can move in the limiting chute N along the first direction. When the floating member 221 moves along the first direction X along with the second single board 212, the limit chute N can move along the first direction X relative to the limit protrusion M (equivalent to the limit protrusion M moving along the first direction X in the limit chute N). In order to achieve the connection between the float member 221 and the second veneer 212, threaded holes 3 and guide pins 4 are provided on the float member 221. The threaded bore 3 may be used to mate a screw or bolt. The guide pin 4 is fixed to the float 221 and extends perpendicularly to the float 221 in a direction away from the fixed cross member 12.

With respect to the structure of the float 221, reference may be made to fig. 9, in which the float 221 is rectangular-like. Four receiving grooves R are provided at four vertex angle positions of the float 221, respectively. The extending direction (i.e., the depth direction) of each accommodating groove R is parallel to the first direction. Each accommodating groove R is used for correspondingly arranging one elastic piece 222. Only two receiving grooves R located at the left side of the float 221 are shown in fig. 9 due to the limited view angle.

Based on the above structure of the floating member 221, please refer to the schematic diagram of the connection structure between the floating member 221 and the fixing plate 121 shown in fig. 10 a. The two fixing plates 121 are arranged symmetrically on two sides of the floating member 221 along the first direction X, and each fixing plate 121 is correspondingly connected with two elastic members 222. The number of the elastic members 222 is four, and the four elastic members 222 correspond to the four vertex angle positions of the floating member 221, respectively. Specifically, the extending and contracting directions of the four elastic members 222 are parallel to the first direction X. Two elastic members 222 are located at one side of the length direction of the floating member 221, and the other two elastic members 222 are located at the other side of the length direction of the floating member 221. For clarity of identification, only two elastic members 222 located on the right side of the float member 221 are exemplarily labeled in the drawings.

The cross-sectional structure schematic shown in fig. 10b can be obtained by cutting the connection structure between the floating member 221 and the fixed plate 121 in a plane parallel to the first direction X and the third direction Z. For each elastic member 222, one end of the elastic member 222 is fixed to the fixing plate 121, and the other end thereof extends into the receiving groove R to be fixed to the floating member 221. The elastic member 222 is exemplified here as a spring. And the expansion and contraction direction of the elastic member 222 is parallel to the first direction X.

As shown in fig. 11, after the second single plate 212 is fixed to the floating member 221, the first screw 5 passes through the second single plate 212 and is locked with the threaded hole 3 on the fixing plate 121 (the fixing plate 121 is blocked by the second single plate 212 here, not shown). The guide pin 4 on the fixing plate 121 passes through the guide hole 2121 on the second single plate 212, and the guide pin 4 is engaged with the guide hole 2121.

Further, the float 221 moves in the first direction X to have a certain range, which may be limited to about 2 mm. As shown in fig. 12a, in the embodiment of the present application, two sides of the floating member 221 are respectively provided with a fixing plate 121. In combination with the process (structure) error, the gap H between any one of the fixing plates 121 and the floating member 221 in the first direction X is defined to be 1±0.15mm in a state where the elastic member 222 is not stressed. So that the float 221 can be moved a distance of 2 + 0.3mm relative to the fixed cross member 12 in the first direction X.

Illustratively, as shown in fig. 12b, the float member 221 is set to move in the direction indicated by the arrow (i.e., to move to the left in the drawing), and the gap between the float member 221 and the fixing plate 121 located on the right side of the float member 221 is increased to H11. The H11 is larger than the original gap H, e.g., H11 is 1.3mm. Correspondingly, the gap between the float 221 and the fixing plate 121 located at the left side of the float 221 is reduced to H21. The H21 is smaller than the original gap H, e.g. H21 is 0.7mm. The two elastic members 222 on the left side of the floating member 221 are compressed, the two elastic members 222 on the right side of the floating member 221 are stretched, and the four elastic members 2223 have a tendency to drive the floating member 221 to move rightward in the first direction X. As shown in fig. 12c, the float member 221 is set to move in the direction indicated by the arrow (i.e., to move to the right in the drawing), and the gap between the float member 221 and the fixing plate 121 located on the right side of the float member 221 is reduced to H12. The H12 is smaller than the original gap H, e.g. H12 is 0.6mm. Correspondingly, the gap between the float 221 and the fixing plate 121 located at the left side of the float 221 increases to H22. The H22 is larger than the original gap H, e.g. H22 is 1.4mm. The two elastic members 222 on the left side of the float member 221 are stretched, the two elastic members 222 on the right side of the float member 221 are compressed, and the four elastic members 222 have a tendency to drive the float member 221 to move leftward in the first direction X.

As shown in fig. 13a, when the rack structure 1 can mount two or more cards 20, each mounting space T may be divided into two or more subspaces T along the width direction (i.e., the third direction Z) of the fixed cross member 12, here, three subspaces T are illustrated. For any one installation space T, two or more subspaces T are arrayed along the third direction Z. Each subspace t may be provided with a corresponding card 20. It should be understood that, as the number of cards 20 increases, the size of the two mounting spaces T on the bracket structure 1 along the third direction Z also needs to increase, that is, the width of the fixed beam 12 (i.e., the size along the third direction Z) also needs to increase, so that the inserting structure 2 mounted on the fixed beam 12 is connected with the corresponding card 20.

Referring further to fig. 13b, it is assumed that six cards 20 can be mounted to the rack structure 1. Specifically, three cards 20a are mounted on the mounting surface a1 side of the fixed cross member 12, and the three cards 20a are arranged in order along the third direction Z. The mounting surface a1 of the fixed beam 12 is provided with an inserting structure 2a, the single board assemblies 21a of the inserting structure 2a can be simultaneously connected with three inserting cards 20a, and the three inserting cards 20a are respectively connected with three single board connectors Q1 on the single board assemblies 21a in a one-to-one correspondence. The single board assembly 21a may be used to interface with a motherboard connector (not shown herein). Correspondingly, three cards 20b are mounted on the mounting surface a2 side of the fixed cross member 12, and the three cards 20b are sequentially arranged along the third direction Z. The mounting surface a1 of the fixed beam 12 is provided with a plugging structure 2b, the single board assembly 21b of the plugging structure 2b can be connected with three plug-in cards 20b at the same time, and the three plug-in cards 20b are respectively connected with three single board connectors Q2 on the single board assembly 21b in a one-to-one correspondence. The single board assembly 21b may be used to interface with a motherboard connector (not shown herein). It should be understood that the structure shown in fig. 13b is only one possible implementation of the adapter module 100 according to the embodiment of the present application, and the installation manner of the card 20 and the adapter unit 10 is not limited.

Referring to fig. 2b, fig. 8, fig. 11, and fig. 13b, when the adapter module 100 provided in the embodiment of the application is plugged with the motherboard 201, if the second board 212 in a certain plugging structure 2 cannot be aligned with the motherboard connector 202 along the plugging direction (i.e. the third direction Z), the second board 212 cannot be precisely plugged with the motherboard connector 201. The position of the second board 212 can be adjusted relative to the support structure 1, so that the second board 212 moves under the floating connection of the floating assembly 22 to align the second board 212 along the plugging direction (i.e. the notch area P on the second board 212 aligns with the positioning protrusion B on the motherboard connector 202 shown in fig. 6 a), so that the second board 212 can be precisely plugged with the motherboard connector 202. Particularly, when the adapter module 100 and the motherboard 201 perform dual-plug or multi-plug, when a certain second board 212 cannot be precisely plugged with the corresponding motherboard connector 202, the second board 212 can be adjusted to achieve precise dual-plug between the second board 212 and the motherboard connector 202.

The embodiment of the present application further provides an electronic device, where the electronic device may include the above-mentioned switching module 100, and the switching module 100 includes the above-mentioned switching unit 10, and the switching unit 10 may be used to implement any of the functions of the switching unit 10 provided in the above-mentioned embodiment. The electronic device is exemplified as a server, which may be specifically a server configured by an image processor. As shown in fig. 14, the server includes a chassis 200, a motherboard 201, and the adapter module 100. The set chassis 200 has a front end and a rear end, and the adapter module 100 may be disposed at the rear end of the chassis 200, so as not to occupy the front space of the chassis 200. A heat radiation fan 203 for radiating heat for the motherboard 201 and other components is also provided between the adapter module 100 and the front end of the chassis 200. In fig. 14, two patching modules 100 (a dotted line box is shown as one patching module 100), each patching module 100 may implement the patching of two cards 20 with two connectors 202 (the patching of the connectors 202 with the cards 20 is shown with reference to fig. 2 b). Since the second board 212 in the switching module 100 can move along the first direction X, the position of the second board 212 relative to the motherboard connector 202 can be adjusted, so that the second boards 212 in the two groups of plugging structures 2 can be precisely plugged with the motherboard connector 202, and the tolerance requirement of high-density dual-plug is satisfied. The server can realize precise double-plug through the switching unit 10 and the main board connector 202, so that a plurality of plug cards 20 can be connected with the main board 201, and the multi-stage synchronous opposite-plug scene is satisfied.

The foregoing is merely illustrative embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the technical scope of the present application, and the application should be covered. Therefore, the protection scope of the application is subject to the protection scope of the claims.

Claims (11)

1. The switching unit is characterized by comprising a bracket structure and a plug-in structure arranged on the bracket structure;

the support structure is used for expanding a mainboard where the switching unit is positioned and can be connected with an inserting card;

the plug-in structure comprises a single-board assembly and a floating assembly; the veneer assembly comprises a first veneer, a flexible cable and a second veneer; the first single board is used for connecting the plug; the second single board is used for connecting with the mainboard connector; the second single board is in floating connection with the support structure through the floating assembly.

2. The pod of claim 1, wherein the float assembly comprises a float and at least one resilient member;

the second single plate is fixedly connected with the floating piece;

the elastic piece is used for connecting the floating piece and the support structure, and the expansion direction of the elastic piece is perpendicular to the inserting direction of the second single board and the mainboard connector.

3. The adapter unit according to claim 2, wherein the floating member has a receiving groove for receiving the elastic member, and an extending direction of the receiving groove is parallel to a telescoping direction of the elastic member.

4. A transfer unit according to claim 2 or 3, wherein the number of elastic members is even;

and an even number of elastic pieces are symmetrically arranged on two sides of the floating piece along the expansion and contraction direction of the elastic pieces.

5. The adapter unit according to claim 4, wherein two fixing plates are arranged on the bracket structure, the two fixing plates are arranged on two sides of the floating piece, and each fixing plate is connected with the floating piece through at least one elastic piece.

6. The adapter unit according to claim 5, wherein a gap between the floating member and any one of the fixing plates is 1±0.15mm in a telescoping direction of the elastic member.

7. The transfer unit of any one of claims 1-6, wherein the support structure is provided with a limit protrusion, the floating assembly is provided with a limit chute, and the limit protrusion is in sliding fit with the limit chute.

8. The adapter unit according to any one of claims 1-7, wherein the bracket structure comprises a fixed bracket and a fixed cross beam;

the fixed bracket is used for bearing the plug-in card; the fixed cross beam is fixed on the fixed support, and is provided with two mounting surfaces which are in one-to-one correspondence with the plug-in structures;

the first veneer is arranged on the mounting surface between the mounting surface and the plug-in structure.

9. A transfer module comprising a plug-in card and a transfer unit according to any one of claims 1-8; the inserting cards are arranged on the support structure and correspond to the inserting structures one by one;

and the plug-in card is connected with the first single board between the plug-in card and the plug-in structure which are mutually corresponding.

10. An electronic device comprising a switch module according to claim 9, the switch module comprising a switch unit for implementing the function of the switch unit according to any one of claims 1 to 8.

11. The electronic device of claim 10, further comprising a chassis, a motherboard;

the main board and the switching module are arranged in the case, and the switching module is positioned at one end of the case;

the main board is provided with at least one connector group, and one connector group in the at least one connector group comprises two main board connectors; each connector group is used for being inserted into one switching module;

the main board connector is in plug-in fit with the second single board.