Floating connector and board-to-board connector assembly comprising same

Abstract

The utility model provides a floating connector and a board-to-board connector assembly comprising the floating connector. The floating connector includes a primary housing, a plurality of contacts, and a first secondary housing and a second secondary housing configured to be independently movable relative to the primary housing. Each contact piece comprises a first contact part, a first holding part, a first spring part, a second holding part, a second spring part, a third holding part and a second contact part. The first holding portion is held by the first secondary housing, the second holding portion is held by the primary housing, and the third holding portion is held by the second secondary housing. The first spring part is connected with the first holding part and the second holding part, and the second spring part is connected with the second holding part and the third holding part. The floating connector can be used for establishing electric connection between two separated circuit boards and can absorb positioning errors of the circuit boards or board-mounted connectors.

Description

Technical Field

[0001] The utility model relates to a floating connector, in particular to a connector with two independently movable floating parts. Background Art

[0002] Known to utilize flexible flat cable and board mounted connector to establish electrical connection between two separated circuit boards.However, when installation space is limited or when the distance between two board mounted connectors mounted on the circuit board is very short, it may not be possible to use flexible flat cable to establish electrical connection between two circuit boards.

[0003] There are also horizontal board-to-board connectors that are used to establish electrical connections between two separate circuit boards. Such horizontal board-to-board connectors are disclosed in Taiwan Utility Model Patent M645087U, for example. However, there are the following problems with using such horizontal board-to-board connectors. For example, when the installation space does not allow the circuit board carrying the horizontal board-to-board connector to move in the mating direction of the horizontal board-to-board connector, in order to disengage the horizontal board-to-board connector or to replace one of the two circuit boards, both circuit boards have to be removed from the installation position at the same time. This will increase the man-hours required to replace the circuit board or the connector. Utility Model Content

[0004] One of the purposes of the utility model is to provide a floating connector, which can bridge two board-mounted connectors respectively mounted on two circuit boards, thereby establishing an electrical connection between the two circuit boards.

[0005] Another object of the utility model is to provide a floating connector, which can absorb the positioning error of the circuit board or the positioning error of the board-mounted connector.

[0006] Another object of the present invention is to provide a floating connector, which can be unlocked without removing the circuit board, allowing each board-mounted connector or each circuit board to be independently removed or replaced.

[0007] According to an embodiment of the present utility model, a floating connector is provided, comprising:

[0008] The main housing includes a first receiving slot and a second receiving slot separated from each other;

[0009] a first secondary housing, comprising a first engaging portion, at least a portion of the first secondary housing being received in the first receiving groove and the first secondary housing being configured to be movable relative to the main housing;

[0010] a second secondary housing, comprising a second engaging portion, at least a portion of the second secondary housing being received in the second receiving groove and the second secondary housing being configured to be movable relative to the main housing; and

[0011] A plurality of contact members, each of which comprises a first contact portion, a first holding portion, a first spring portion, a second holding portion, a second spring portion, a third holding portion and a second contact portion, the first contact portion extending from the first holding portion, the first holding portion being held by the first secondary housing, the second holding portion being held by the main housing, the first spring portion connecting the first holding portion and the second holding portion, the second contact portion extending from the third holding portion, the third holding portion being held by the second secondary housing, the second spring portion connecting the second holding portion and the third holding portion, the first contact portion being disposed at the first fitting portion, and the second contact portion being disposed at the second fitting portion;

[0012] Each of the first secondary housing and the second secondary housing is floatably supported by the plurality of contacts.

[0013] According to the floating connector of the utility model, the movement of the first secondary housing and the movement of the second secondary housing are independent of each other.

[0014] According to the floating connector of the utility model, the first receiving groove and the second receiving groove are arranged in parallel.

[0015] According to the floating connector of the utility model, the openings of the first receiving groove and the second receiving groove are on the same side of the main housing.

[0016] According to the floating connector of the utility model, the first fitting portion of the first secondary housing and the second fitting portion of the second secondary housing are configured as socket-type fitting portions.

[0017] According to another embodiment of the present invention, a board-to-board connector assembly is provided, comprising a floating connector and two mating connectors, wherein the two mating connectors are respectively mounted on two separate circuit boards, and the floating connector comprises:

[0018] The main housing includes a first receiving slot and a second receiving slot separated from each other;

[0019] a first secondary housing, comprising a first engaging portion, at least a portion of the first secondary housing being received in the first receiving groove and the first secondary housing being configured to be movable relative to the main housing;

[0020] a second secondary housing, comprising a second engaging portion, at least a portion of the second secondary housing being received in the second receiving groove and the second secondary housing being configured to be movable relative to the main housing, the movement of the first secondary housing being independent of the movement of the second secondary housing; and

[0021] A plurality of first contact members, each of which comprises a first contact portion, a first holding portion, a first spring portion, a second holding portion, a second spring portion, a third holding portion and a second contact portion, the first contact portion extending from the first holding portion, the first holding portion being held by the first secondary housing, the second holding portion being held by the main housing, the first spring portion connecting the first holding portion and the second holding portion, the second contact portion extending from the third holding portion, the third holding portion being held by the second secondary housing, the second spring portion connecting the second holding portion and the third holding portion, the first contact portion being disposed at the first fitting portion, and the second contact portion being disposed at the second fitting portion;

[0022] wherein each of the first secondary housing and the second secondary housing is floatably supported by the plurality of first contacts;

[0023] One of the two mating connectors is engaged with the first secondary housing, and the other of the two mating connectors is engaged with the second secondary housing.

[0024] Each mating connector includes:

[0025] A matching housing, comprising a matching fitting portion, the matching fitting portion fitting with the first fitting portion of the first secondary housing or the second fitting portion of the second secondary housing;

[0026] A plurality of second contact members, the plurality of second contact members are held by the mating housing, each second contact member comprises a second contact portion, a fourth holding portion and a welding connection portion, the fourth holding portion extends from the welding connection portion, the second contact portion extends from the fourth holding portion, the second contact portion is disposed at the mating fitting portion, and the fourth holding portion is held by the mating housing;

[0027] When the two mating connectors are engaged with the floating connector, the plurality of second contacts are respectively in contact with the first contacts, thereby establishing an electrical connection between the two circuit boards.

[0028] According to the board-to-board connector assembly of the utility model, each mating connector further includes a metal shell, the metal shell is assembled on the mating shell, the metal shell includes a plurality of elastic arms, and a fixing protrusion is formed at the distal end of each elastic arm.

[0029] According to the board-to-board connector assembly of the utility model, each mating connector further includes a pair of metal brackets, the pair of metal bracket bodies are respectively fixed at two ends of the mating shell, and the pair of metal bracket bodies are integrally formed with the metal shell or separately formed from the metal shell.

[0030] According to the board-to-board connector assembly of the utility model, the mating fitting portion of the mating housing is configured as a plug-type fitting portion.

[0031] According to the board-to-board connector assembly of the utility model, the plug-type engaging portion is a tongue plate, the second contact portion is arranged on one side of the tongue plate, a plurality of fixing protrusions are formed on the other side of the tongue plate, and the mating connector further includes a pair of metal brackets, and the pair of metal bracket bodies are respectively fixed at both ends of the mating shell.

[0032] A person having ordinary technical knowledge in the technical field to which the utility model belongs will be able to best understand the technical features and other purposes and advantages of the utility model after referring to the specification and drawings of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a stereoscopic view of the board-to-board connector assembly in the mating state according to the first embodiment of the utility model.

[0034] Figure 2 It is a three-dimensional diagram of the board-to-board connector assembly according to the utility model in an unmated state.

[0035] Figure 3 It is a stereoscopic diagram of a floating connector according to the utility model.

[0036] Figure 4 It is a three-dimensional exploded view of the floating connector according to the utility model.

[0037] Figure 5 It is a front view of the floating connector according to the utility model.

[0038] Figure 6 is along Figure 5 Section taken along the midline AA.

[0039] Figure 7 is along Figure 5 Section taken along the midline BB.

[0040] Figure 8 It is a stereogram of a mating connector according to the utility model.

[0041] Fig. 9 It is another stereoscopic view of the mating connector according to the utility model.

[0042] Fig.10 It is a three-dimensional exploded view of the mating connector according to the utility model.

[0043] Fig.11 It is a front view of the board-to-board connector assembly according to the utility model in a mating state.

[0044] Fig.12 is along Fig.11 Section taken along the midline CC.

[0045] Fig.13 It is a perspective view of a modified example of the mating connector.

[0046] Fig.14 It is another perspective view of a modified example of the mating connector.

[0047] Fig.15 It is an exploded perspective view of a modified example of the mating connector.

[0048] Fig.16 It is a front view of a board-to-board connector assembly in a mating state according to a second embodiment of the present utility model.

[0049] Fig.17 is along Fig.16 Section taken along the midline DD.

[0050] Description of Reference Numerals

[0051] 1: Board-to-board connector assembly

[0052] 1': Board-to-board connector assembly

[0053] 10: Floating connector

[0054] 11: Main shell

[0055] 111: First housing part

[0056] 112 second housing part

[0057] 12: First secondary shell

[0058] 120: Ontology part

[0059] 1200: Chimeric part

[0060] 121: Limiting block

[0061] 13: Second secondary shell

[0062] 130: Ontology part

[0063] 1300: Chimeric part

[0064] 131: Limiting protrusion

[0065] 14: Contact

[0066] 141: First contact portion

[0067] 142: First holding part

[0068] 143: First spring portion

[0069] 144: Second holding part

[0070] 145: Second spring portion

[0071] 146: Third holding unit

[0072] 147: Second contact portion

[0073] 20: First mating connector

[0074] 21:Matching shell

[0075] 211: Tongue plate

[0076] 22:Metal shell

[0077] 222: First welding fixing portion

[0078] 223: Second welding fixing portion

[0079] 221:Metal bracket

[0080] 2211:Stent holding part

[0081] 2212: Bracket welding fixing part

[0082] 224: Elastic arm

[0083] 2240:Fixing protrusion

[0084] 23: Contact

[0085] 231:Contact Department

[0086] 232: Maintaining part

[0087] 233: Welding connection

[0088] 30: Second mating connector

[0089] 40: First mating connector

[0090] 41:Matching shell

[0091] 411: Tongue plate

[0092] 4110:Fixing protrusion

[0093] 42:Metal bracket

[0094] 421: Maintaining part

[0095] 422: Bracket welding fixing part

[0096] 423: Bracket welding fixing part

[0097] 44: Welding fixed components

[0098] 441: Welding fixing part

[0099] 442: Maintaining part

[0100] 43: Contact

[0101] 431:Contact Department

[0102] 432: Maintaining part

[0103] 433: Welding connection

[0104] 50: Second mating connector

[0105] SP1: First storage slot

[0106] SP2: Second storage slot. DETAILED DESCRIPTION

[0107] The board-to-board connector assembly of the present invention will be described below with reference to the accompanying drawings. In each of the drawings, the same elements or elements with the same function are marked with the same reference numerals. The drawings are not drawn to scale.

[0108] Figure 1 It is a stereoscopic view of the board-to-board connector assembly in the mating state according to the first embodiment of the utility model. Figure 2 1 is a perspective view of a board-to-board connector assembly according to a first embodiment of the present invention in an unmated state. Figure 1 and Figure 2 , the components of the board-to-board connector assembly according to the first embodiment of the present invention are briefly described. The board-to-board connector assembly is marked with reference numeral 1 as a whole.

[0109] The board-to-board connector assembly 1 includes a floating connector 10, a first mating connector 20, and a second mating connector 30. The first mating connector 20 is mounted on the first circuit board P1 using surface mounting technology, and the second mating connector 30 is mounted on the second circuit board P2 separated from the first circuit board P1 using surface mounting technology. The floating connector 10 is used to bridge the first mating connector 20 and the second mating connector 30, thereby establishing an electrical connection between the first circuit board P1 and the second circuit board P2. In order to absorb the positioning error of the first circuit board P1, the second circuit board P2 or the first mating connector 20, the second mating connector 30, the floating connector 10 has a floating member (i.e., the first secondary shell and the second secondary shell described below) that can be floated and supported.

[0110] Reference Figure 3 and Figure 4 A floating connector 10 is described, wherein Figure 3 is a perspective view of the floating connector 10, Figure 4 : is a three-dimensional exploded view of the floating connector 10. In order to facilitate the display of the characteristics of the floating connector 10, Figure 3 and Figure 4 The floating connector 10 in Figure 1 or Figure 2 The floating connector 10 is shown in an inverted state.

[0111] The floating connector 10 includes a main housing 11, a first secondary housing 12, a second secondary housing 13 and a plurality of contacts 14. The main housing 11, the first secondary housing 12 and the second secondary housing 13 are made of insulating resin or polymer material by injection molding. The contacts 14 are made of copper or copper alloy and are formed by stamping a metal sheet.

[0112] The main housing 11 is composed of a first housing portion 111 and a second housing portion 112. The first housing portion 111 and the second housing portion 112 are joined to each other by a snap-fit ​​structure. The main housing 11 is provided with a first receiving groove SP1 and a second receiving groove SP2 which are spaced apart from each other in parallel. The first secondary housing 12 and the second secondary housing 13 are received in the first receiving groove SP1 and the second receiving groove SP2, respectively. The first secondary housing 12 and the second secondary housing 13 can be completely received in the first receiving groove SP1 and the second receiving groove SP2, respectively, or can be partially received in the first receiving groove SP1 and the second receiving groove SP2, respectively. A gap is maintained between the first receiving groove SP1 and the first secondary housing 12, allowing the first secondary housing 12 to move relative to the main housing 11 in the first receiving groove SP1 on a plane perpendicular to the mating direction of the mating connector (i.e., a plane parallel to the first circuit board P1 or the second circuit board P2). A gap is maintained between the second receiving groove SP2 and the second secondary shell 13, allowing the second secondary shell 13 to move in the second receiving groove SP1 relative to the main shell 11 on a plane perpendicular to the mating direction of the mating connector (i.e., a plane parallel to the first circuit board P1 or the second circuit board P2).

[0113] Figure 5 is a front view of the floating connector 10 . Figure 6 is along Figure 5 Section taken along the midline AA. Figure 7 is along Figure 5 Section taken along the midline BB.

[0114] The first secondary housing 12 includes a main body 120 and stopper protrusions 121 formed at both ends of the main body 120, and the main body 120 includes a fitting portion 1200. The second secondary housing 13 includes a main body 130 and stopper protrusions 131 formed at both ends of the main body 130, and the main body 130 includes a fitting portion 1300. The moving ranges of the first secondary housing 12 and the second secondary housing 13 can be set by the stopper protrusions 121 and 131, and the first secondary housing 12 and the second secondary housing 13 can be prevented from being separated from the main housing 11 by the interference between the main housing 11 and the stopper protrusions 121 and 131. Both the fitting portion 1200 and the fitting portion 1300 are made into socket-type fitting portions.

[0115] like Figure 7 As shown, each contact member 14 includes a first contact portion 141, a first holding portion 142, a first spring portion 143, a second holding portion 144, a second spring portion 145, a third holding portion 146 and a second contact portion 147. The first contact portion 141 extends from the first holding portion 142, and the first holding portion 142 is held by the first secondary housing 12. The second holding portion 144 is held by the main housing 11. The first spring portion 143 connects the first holding portion 142 and the second holding portion 144. The second contact portion 147 extends from the third holding portion 146, and the third holding portion 146 is held by the second secondary housing 13. The second spring portion 145 connects the second holding portion 144 and the third holding portion 146. In this way, the first secondary housing 12 and the second secondary housing 13 are floatably and elastically supported by the contact member 14. The movement of the first secondary housing 12 is independent of the movement of the second secondary housing 13. The first contact portion 141 is disposed on the first fitting portion 1200, and the second contact portion 147 is disposed on the second fitting portion 1300. When the first mating connector 20 is mated with the first fitting portion 1200 and the second mating connector 30 is mated with the second fitting portion 1300, an electrical connection is established between the first mating connector 20 and the second mating connector 30 through the contact 14 of the floating connector 10.

[0116] Reference Figures 8 to 10 The first mating connector 20 is described, wherein Figure 8 is a perspective view of the mating connector 20, Fig. 9 is another perspective view of the mating connector 20, and Fig.10 It is a perspective exploded view of the mating connector 20. In principle, the structure of the second mating connector 30 is the same as that of the first mating connector 20, so the description of the second mating connector 30 is omitted.

[0117] The first mating connector 20 includes a mating housing 21, a metal shell 22 mounted on the mating housing 21, and a plurality of contacts 23 held by the mating housing 21. The mating housing 21 includes a tongue plate 211 as a plug-type mating mating portion. The tongue plate 211 is to be mated with the first mating portion 1200 of the first secondary housing 12.

[0118] Each contact 23 includes a contact portion 231, a holding portion 232, and a welding connection portion 233. The holding portion 232 extends from the welding connection portion 233, and the contact portion 231 extends from the holding portion 232 and is disposed on the tongue plate 211. The holding portion 232 is held by the mating housing 21. The metal housing 22 is assembled on one side of the tongue plate 211, and the contact portion 231 is disposed on the other side of the tongue plate 211.

[0119] like Figure 8 and Fig.10 As shown, the metal shell 22 is integrally formed with two first welding fixing portions 222 and two second welding fixing portions 223 at the lower edge. The metal shell 22 is integrally formed with two metal brackets 221 at both ends. Each metal bracket 221 is roughly configured in an inverted U-shape. Each metal bracket 221 is provided with a bracket retaining portion 2211 and a bracket welding fixing portion 2212. The bracket retaining portion 2211 is fixed to the mating shell 21 in an interference fit manner. The first mating connector 20 is firmly fixed to the first circuit board P1 by welding the first welding fixing portion 222, the second welding fixing portion 223 and the bracket welding fixing portion 2212 to the welding pads on the first circuit board P1. The metal shell 22 is further provided with a plurality of elastic arms 224. A fixing protrusion 2240 is formed at the distal end of each elastic arm 224. During the process of the floating connector 10 being engaged with the first mating connector 20 or the process of the floating connector 10 being separated from the first mating connector 20, the locking protrusion 2240 will interfere with the main housing 11 of the floating connector 10, so that the floating connector 10 is not easily separated from the first mating connector 20. In this embodiment, the metal shell 22 can also serve as a reinforcing member of the mating housing 21 to prevent the mating housing 21 from deformation or warping.

[0120] Fig.11 It is a front view of the board-to-board connector assembly 1 in the mating state. Fig.12 is along Fig.11 The section is taken from the center line CC. Fig.12 As shown, in the mating state, the contact of the first mating connector 20 contacts one end of the contact of the floating connector 10, and the contact of the second mating connector 30 contacts the other end of the contact of the floating connector 10. The first mating connector 20 and the second mating connector 30 are bridged by the floating connector 10. Thus, an electrical connection between the first circuit board P1 and the second circuit board P2 is established.

[0121] Reference Figures 13 to 15 A modified example of a mating connector is described, wherein Fig.13 is a perspective view of a modified example of a mating connector. Fig.14 is another perspective view of a modified example of the mating connector, Fig.15 4 is an exploded perspective view of a modified example of a mating connector. A first mating connector as a modified example of a mating connector is denoted as a whole by reference numeral 40 .

[0122] The first mating connector 40 includes a mating housing 41, a pair of metal brackets 42 respectively arranged at both ends of the mating housing 41, and a plurality of contacts 43 held by the mating housing 41. The mating housing 41 includes a tongue plate 411 as a plug-type mating fitting portion. Each contact 43 includes a contact portion 431, a holding portion 432, and a soldering connection portion 433. The holding portion 432 extends from the soldering connection portion 433, and the contact portion 431 extends from the holding portion 432 and is arranged on the tongue plate 411. The holding portion 432 is held by the mating housing 41.

[0123] Each metal bracket 42 is substantially configured in an inverted U-shape. Each metal bracket 42 includes a holding portion 421 and a pair of bracket welding fixing portions 422 and 423. The holding portion 421 is fixed to the mating housing 41 in an interference fit manner.

[0124] The first mating connector 40 further includes a pair of welding fixing members 44. Each welding fixing member 44 includes a welding fixing portion 441 and a holding portion 442. The holding portion 442 is held by the mating housing 41. The first mating connector 40 is firmly fixed to the first circuit board P1 by welding the bracket welding fixing portions 422, 423 and the welding fixing portion 441 to the welding pads on the first circuit board P1.

[0125] The contact portion 431 is disposed on one side of the tongue plate 411 , and a plurality of fixing protrusions 4110 are integrally formed on the other side of the tongue plate 411 . The role and function of the fixing protrusions 4110 are substantially the same as the fixing protrusions 2240 formed on the metal housing 22 of the first mating connector 20 .

[0126] Fig.16 It is a front view of the board-to-board connector assembly in the second embodiment of the present invention in the mating state. Fig.17 is along Fig.16 The cross section taken along the center line DD The board-to-board connector assembly of the second embodiment of the present invention is generally denoted by reference numeral 1 '.

[0127] The board-to-board connector assembly 1' comprises a floating connector 10, a first mating connector 40 and a second mating connector 50. The second mating connector 50 has the same structure as the first mating connector 40, so the description thereof is omitted.

[0128] like Fig.17 As shown, in the mating state, the contact of the first mating connector 40 contacts one end of the contact of the floating connector 10, and the contact of the second mating connector 50 contacts the other end of the contact of the floating connector 10. The first mating connector 40 and the second mating connector 50 are bridged by the floating connector 10. Thus, an electrical connection is established between the first circuit board P1 and the second circuit board P2.

[0129] According to a preferred embodiment of the present invention, the first mating connector 20 and the second mating connector 30 (or the first mating connector 40 and the second mating connector 50) are configured to have the same structure. However, according to other embodiments of the present invention, the board-to-board connector assembly may include a first mating connector and a second mating connector having different structures. In addition, the first mating connector 20 and the first mating connector 40 as a modified example may replace each other.

[0130] Although the fitting portion of the first secondary housing and the fitting portion of the second secondary housing are both configured as socket-type fitting portions, and the fitting portion of the first mating connector and the fitting portion of the second mating connector are both configured as plug-type fitting portions, the present invention is not limited thereto. If necessary, the fitting portion of the first secondary housing or the fitting portion of the second secondary housing may also be configured as a plug-type fitting portion, and the fitting portion of the first mating connector or the fitting portion of the second mating connector may also be configured as a socket-type fitting portion.

[0131] Although the present invention is described with reference to the preferred embodiments, it should be understood that without departing from the spirit and scope of the present invention, many changes and modifications are possible for those with ordinary technical knowledge in the technical field to which the present invention belongs. Therefore, the present invention is not limited to the disclosed embodiments, but is subject to the text of the claims, that is, equivalent changes and modifications that do not deviate from the claims of the present invention should still fall within the scope of the present invention.

Claims

1. A floating connector, characterized in that: include: The main housing includes a first receiving groove and a second receiving groove separated from each other; a first secondary housing, comprising a first engaging portion, at least a portion of the first secondary housing being received in the first receiving groove and the first secondary housing being configured to be movable relative to the main housing; A second secondary housing, comprising a second engaging portion, at least a portion of the second secondary housing being received in the second receiving groove and the second secondary housing being configured to be movable relative to the main housing; and A plurality of contact members, each of which comprises a first contact portion, a first holding portion, a first spring portion, a second holding portion, a second spring portion, a third holding portion and a second contact portion, the first contact portion extending from the first holding portion, the first holding portion being held by the first secondary housing, the second holding portion being held by the main housing, the first spring portion connecting the first holding portion and the second holding portion, the second contact portion extending from the third holding portion, the third holding portion being held by the second secondary housing, the second spring portion connecting the second holding portion and the third holding portion, the first contact portion being disposed at the first fitting portion, and the second contact portion being disposed at the second fitting portion; Each of the first secondary housing and the second secondary housing is floatably supported by the plurality of contacts.

2. The floating connector according to claim 1, characterized in that: The movement of the first secondary housing and the movement of the second secondary housing are independent of each other.

3. The floating connector according to claim 2, characterized in that: The first receiving groove and the second receiving groove are arranged in parallel.

4. The floating connector according to any one of claims 1 to 3, characterized in that: The openings of the first receiving groove and the second receiving groove are located on the same side of the main shell.

5. The floating connector according to any one of claims 1 to 3, characterized in that: The first fitting portion of the first secondary housing and the second fitting portion of the second secondary housing are configured as socket-type fitting portions.

6. A board-to-board connector assembly, comprising a floating connector and two mating connectors, wherein the two mating connectors are respectively mounted on two separate circuit boards, characterized in that: The floating connector includes: The main housing includes a first receiving groove and a second receiving groove separated from each other; a first secondary housing, comprising a first engaging portion, at least a portion of the first secondary housing being received in the first receiving groove and the first secondary housing being configured to be movable relative to the main housing; a second secondary housing, comprising a second engaging portion, at least a portion of the second secondary housing being received in the second receiving groove and the second secondary housing being configured to be movable relative to the main housing, the movement of the first secondary housing being independent of the movement of the second secondary housing; and A plurality of first contact members, each of which comprises a first contact portion, a first holding portion, a first spring portion, a second holding portion, a second spring portion, a third holding portion and a second contact portion, the first contact portion extending from the first holding portion, the first holding portion being held by the first secondary housing, the second holding portion being held by the main housing, the first spring portion connecting the first holding portion and the second holding portion, the second contact portion extending from the third holding portion, the third holding portion being held by the second secondary housing, the second spring portion connecting the second holding portion and the third holding portion, the first contact portion being disposed at the first fitting portion, and the second contact portion being disposed at the second fitting portion; wherein each of the first secondary housing and the second secondary housing is floatably supported by the plurality of first contacts; One of the two mating connectors is engaged with the first secondary housing, and the other of the two mating connectors is engaged with the second secondary housing. Each mating connector includes: A matching housing, comprising a matching fitting portion, the matching fitting portion fitting with the first fitting portion of the first secondary housing or the second fitting portion of the second secondary housing; A plurality of second contact members, the plurality of second contact members are held by the mating housing, each second contact member comprises a second contact portion, a fourth holding portion and a welding connection portion, the fourth holding portion extends from the welding connection portion, the second contact portion extends from the fourth holding portion, the second contact portion is disposed at the mating fitting portion, and the fourth holding portion is held by the mating housing; When the two mating connectors are engaged with the floating connector, the plurality of second contacts are respectively in contact with the first contacts, thereby establishing an electrical connection between the two circuit boards.

7. The board-to-board connector assembly according to claim 6, wherein: Each mating connector further comprises a metal shell, which is assembled on the mating shell, and the metal shell comprises a plurality of elastic arms, and a fixing protrusion is formed at the distal end of each elastic arm.

8. The board-to-board connector assembly according to claim 7, wherein: Each mating connector further includes a pair of metal brackets, which are respectively fixed at two ends of the mating shell, and the pair of metal brackets are integrally formed with the metal shell or separately formed from the metal shell.

9. The board-to-board connector assembly according to claim 7, wherein: The mating fitting portion of the mating housing is configured as a plug-type fitting portion.

10. The board-to-board connector assembly according to claim 9, wherein: The plug-type engaging portion is a tongue plate, the second contact portion is arranged on one side of the tongue plate, and a plurality of fixing protrusions are formed on the other side of the tongue plate. The mating connector further comprises a pair of metal brackets, which are respectively fixed on the two ends of the mating shell.

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