Electric connector assembly and wire end connector thereof

Abstract

The invention discloses an electric connector assembly and a wire end connector thereof. The electric connector assembly comprises a wire end connector and a board end connector. The board end connector is used for being electrically connected with a circuit board. The board end connector comprises a first shell, a slot and a plurality of conductive terminals. The plurality of conductive terminals are arranged in the slot. And the wire end connector is detachably butted with the plate end connector. The plate end connector comprises a second shell and a tongue plate. The wire end connector is provided with four side walls to jointly define an accommodating space. The tongue plate is arranged in the accommodating space. The lingual plate is connected with a cable assembly, and a plurality of contact pads are arranged on the surface of the lingual plate. When the plate end connector is in butt joint with the wire end connector, the tongue plate is inserted into the slot, so that the plurality of contact pads are electrically contacted with the plurality of conductive terminals, and the first shell is inserted into the accommodating space. Therefore, the overall structural strength when the plate end connector and the wire end connector are in butt joint is enhanced, and the stability of signal transmission is improved.

Description

Technical Field

[0001] The present invention relates to an electrical connector assembly and a wire-end connector thereof, and particularly to an electrical connector assembly and a wire-end connector thereof for enhancing the stability of signal transmission. Background Art

[0002] The wire-end connector and the board-end connector are electrically connected to each other through engagement, so that the conductive terminals inside the two are electrically connected to achieve the purpose of signal transmission. The firmness of the engagement structure between the connectors affects the stability of signal transmission. For the existing wire-end connector, when the connected cable is arranged, it is easy to be bent due to insufficient accommodation space or the cable sags due to gravity, resulting in the shaking or pulling of the connector structure, and thus causing unstable signal transmission.

[0003] Therefore, how to overcome the above-mentioned defects through the improvement of structural design has become one of the important issues to be solved in this field. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an electrical connector assembly and a wire-end connector thereof in view of the deficiencies of the prior art.

[0005] To solve the above technical problem, one of the technical solutions adopted by the present invention is to provide an electrical connector assembly, which includes a wire-end connector and a board-end connector. The board-end connector is used to electrically connect a circuit board. The board-end connector includes a first housing, a slot and a plurality of conductive terminals. The plurality of conductive terminals are arranged inside the slot. The wire-end connector is detachably docked with the board-end connector. The wire-end connector includes a second housing and a tongue plate. The wire-end connector has four side walls to jointly define a receiving space, and the tongue plate is arranged in the receiving space. The tongue plate is connected to a cable assembly, and a plurality of contact pads are arranged on the surface of the tongue plate. When the board-end connector is docked with the wire-end connector, the tongue plate is inserted into the slot, so that the plurality of contact pads are in electrical contact with the plurality of conductive terminals, and the first housing is inserted into the receiving space.

[0006] To solve the above technical problem, another technical solution adopted by the present invention is to provide a wire-end connector, which includes a housing assembly, a tongue plate and an elastic fastener. The housing assembly has four side walls to enclose a receiving space. A part of the tongue plate is arranged inside the housing and connected to a cable assembly, and another part of the tongue plate is exposed in the receiving space and provided with a plurality of contact pads. The elastic fastener has a fixed end and a free end. The fixed end is fixed to the housing assembly and is located inside the receiving space. The free end protrudes from the four side walls.

[0007] One of the beneficial effects of the present invention is that the electrical connector assembly and the wire-end connector thereof provided by the present invention can enhance the overall structural strength when the board-end connector is docked with the wire-end connector through the structural design that the second housing at least partially covers the first housing, and increase the stability of signal transmission.

[0008] To enable a further understanding of the features and technical content of the present invention, please refer to the following detailed description and drawings of the present invention. However, the provided drawings are only for reference and illustration, and are not used to limit the present invention. Description of the Drawings

[0009] Figure 1 Schematic diagram of the wire-end connector according to the first embodiment of the present invention.

[0010] Figure 2 Partial exploded schematic diagram of the wire-end connector according to the first embodiment of the present invention.

[0011] Figure 3 For Figure 1 Cross-sectional schematic diagram of the III-III section of

[0012] Figure 4 Exploded schematic diagram of the wire-end connector according to the first embodiment of the present invention.

[0013] Figure 5 Schematic diagram of the first implementation form of the wire-end connector and the board-end connector according to the first embodiment of the present invention.

[0014] Figure 6 Schematic diagram of the board-end connector according to the first embodiment of the present invention.

[0015] Figure 7 Schematic diagram of the first implementation form of the wire-end connector docking with the board-end connector according to the first embodiment of the present invention.

[0016] Figure 8 Schematic diagram of the second implementation form of the wire-end connector and the board-end connector according to the first embodiment of the present invention.

[0017] Figure 9 Schematic diagram of the wire-end connector according to the second embodiment of the present invention.

[0018] Figure 10 Cross-sectional schematic diagram of the wire-end connector according to the second embodiment of the present invention.

[0019] Figure 11 Schematic diagram of the wire-end connector and the board-end connector according to the second embodiment of the present invention.

[0020] Figure 12 Schematic diagram of the wire-end connector according to the third embodiment of the present invention.

[0021] Figure 13 Partial exploded schematic diagram of the wire-end connector according to the third embodiment of the present invention.

[0022] Figure 14Schematic diagram of the wire-end connector and the board-end connector according to the third embodiment of the present invention. Detailed implementation manners

[0023] The following are specific embodiments to illustrate the implementation manners of the present invention regarding "the electrical connector assembly and its wire-end connector". Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of the present invention. Additionally, the drawings of the present invention are only for simple schematic illustration and are not drawn according to actual dimensions. This is stated in advance. The following implementation manners will further detail the related technical content of the present invention, but the disclosed content is not used to limit the protection scope of the present invention.

[0024] It should be understood that although terms such as "first", "second", "third", etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are mainly used to distinguish one element from another. Additionally, the term "or" used herein should, depending on the actual situation, possibly include any one or a combination of more of the associated listed items.

[0025] First embodiment

[0026] Refer to Figure 1 、 Figure 3 and Figure 4 as shown, Figure 1 Schematic diagram of the wire-end connector according to the first embodiment of the present invention, Figure 3 is Figure 1 the schematic cross-sectional view of the III-III cross-section of. The wire-end connector 2 includes a second housing 21 and a tongue plate 22. The second housing 21 has a second receiving space P2. The tongue plate 22 is partially disposed inside the second housing 21 and is used to connect the cable assembly 3 (such as a flat cable). The tongue plate 22 is partially exposed in the second receiving space P2, and a plurality of contact pads 23 (commonly known as gold fingers) are provided on the upper surface and the lower surface of the exposed part.

[0027] Refer to Figure 5 and Figure 6 as shown, Figure 5 Schematic diagram of the first implementation type of the wire-end connector and the board-end connector according to the first embodiment of the present invention, Figure 6Schematic diagram of the first implementation form of the wire-end connector docking with the board-end connector according to the first embodiment of the present invention. The board-end connector 1 includes a first housing 11, a plurality of conductive terminals 12, and a terminal base 13. The terminal base 13 is made of insulating material and has a slot 130, and a plurality of conductive terminals 12 are fixed to the terminal base 13. One end of each conductive terminal 12 is located in the slot 130, and the other end of each conductive terminal 12 is exposed as a pin. The first housing 11 is made of conductive material and covers the outside of the terminal base 13. The board-end connector 1 is fixed to a circuit board through a plurality of fixing posts 131 of the terminal base 13 ( Figure 5 not shown).

[0028] Referring to Figure 2 as shown Figure 2 is a partial exploded view of the wire-end connector according to the first embodiment of the present invention. The wire-end connector 2 further includes a metal frame member 24, and the metal frame member 24 is detachably assembled to the second housing 21. The second housing 21 is an insulating housing, that is, the metal frame member 24 and the second housing 21 can jointly form a housing assembly. Specifically, the second receiving space P2 of the second housing 21 is surrounded by four side walls, that is, the first side wall WL1, the second side wall WL2, the third side wall WL3, and the metal frame member 24 define the second receiving space P2. The first side wall WL1 is perpendicularly connected between the second side wall WL2 and the third side wall WL3. Therefore, as Figure 2 and Figure 6 shown, when the wire-end connector 2 is docked with the board-end connector 1, the first housing 11 is inserted into the second receiving space P2. At this time, the second housing 21 only surrounds the first housing 11 with the first side wall WL1, the second side wall WL2, and the third side wall WL3, that is, only three of the four sides of the first housing 11 will be covered by the first housing 11.

[0029] By assembling the metal frame member 24 on the second housing 21, the metal frame member 24 becomes the fourth side wall surrounding the first housing 11, and then the second housing 21 and the metal frame member 24 jointly define the second receiving space P2 to completely surround the first housing 11. That is, the first side wall WL1, the second side wall WL2, the third side wall WL3, and the metal frame member 24 will form continuous four side walls surrounding the second receiving space P2 on all sides. In some application scenarios, the first housing 11 is electrically connected to the ground potential of the circuit board, and the metal frame member 24 is electrically connected to the first housing 11 to play a shielding role to enhance the ability of the electrical connector assembly D to resist electromagnetic crosstalk in high-frequency signal transmission.

[0030] Refer back to Figure 2As shown, the metal frame member 24 is bent into a U-shaped structure. The metal frame member 24 includes a first metal section 241, a second metal section 242, and a third metal section 243. The second metal section 242 and the third metal section 243 are respectively connected to both ends of the first metal section 241. The side edge of the first metal section 241 has a plurality of limiting protrusions 245, and the second metal section 242 and the third metal section 243 each include a cantilever 244. The two cantilevers 244 are concave (i.e., the two cantilevers 244 are bent towards each other) and elastic. Both sides of the second housing 21 respectively have two locking grooves 216. Specifically, the locking groove 216 is a strip-shaped groove. As Figure 1 and Figure 2 shown, the metal frame member 24 can be assembled along a first direction (negative X-axis direction), that is, the edges of the second side wall WL2 and the third side wall WL3 are on the second housing 21. The limiting protrusions 245 extend towards the first direction. As Figure 3 shown, the bottom of the second housing 21 has a plurality of limiting holes V respectively corresponding to the plurality of limiting protrusions 245. The limiting protrusions 245 will respectively insert into the plurality of limiting holes V when the metal frame member 24 is assembled to the second housing 21 (see Figure 3 ).

[0031] The second metal section 242 and the third metal section 243 can be respectively detachably assembled to the second side wall WL2 and the third side wall WL3. Specifically, the second metal section 242 and the third metal section 243 each further include a hook portion 246, and the position of the hook portion 246 is adjacent to the cantilever 244. On both sides of the second housing 21 in the second accommodation space P2, two cutting grooves 217 are respectively provided. The two hook portions 246 will respectively insert into the two cutting grooves 217 when the metal frame member 24 is assembled to the second housing 21, so as to respectively hook the second side wall WL2 and the third side wall WL3, preventing the second metal section 242 and the third metal section 243 of the metal frame member 24 from being bent outwards (i.e., bent towards the positive and negative Z-axis directions) by an external force and disengaging from the second housing 21.

[0032] In addition, when the metal frame member 24 is assembled to the second housing 21 along the first direction, the two cantilevers 244 are respectively clamped in the two locking grooves 216. Further, the locking groove 216 limits the cantilever 244 in the positive X-axis direction, that is, the metal frame member 24 cannot withdraw along a second direction (positive X-axis direction) opposite to the first direction. When the metal frame member 24 moves in the positive X-axis direction, the concave cantilever 244 will abut against the locking groove 216.

[0033] Refer to Figures 2 to 4As shown, the wire end connector 2 also includes an elastic fastener 25, a drawstring 26, a retaining member 27, and a docking plate 29. The docking plate 29 is at least partially located in the second receiving space P2 and is located between the first side wall WL1 and the tongue plate 22. The fixed end 25A of the elastic fastener 25 is mounted on the docking plate 29, and the free end 25B protrudes outward from the outer surface of the first side wall WL1. That is, the tongue plate 22, the docking plate 29, and the fixed end 25A of the elastic fastener 25 are all located in the second receiving space P2. It should be noted that in order to clearly show the elastic fastener 25 and the retaining member 27, Figure 4 The drawstring 26 is omitted, and the structure of the drawstring 26 can be configured by Figure 2 and Figure 3 The second housing 21 further includes a fastening groove 211 and a fixing column 212 . The fastening groove 211 is disposed on the first side wall WL1 , and at least one fastening point 251 on the surface of the elastic fastener 25 is exposed outside the fastening groove 211 .

[0034] The retaining member 27 has a guide opening 270, and the drawstring 26 has a wrapping portion 261. The drawstring 26 passes through the guide opening 270, and wraps around the fixing column 212 through the wrapping portion 261, and is partially located outside the elastic fastener 25, so that when the drawstring 26 is pulled, the free end 25B of the elastic fastener 25 can be pressed. At least one snap hole 111 is also provided on one side of the first shell 11. When the board-end connector 1 is docked with the line-end connector 2, the snap hole 111 and the snap point 251 are snapped with each other, so that the board-end connector 1 and the line-end connector 2 are fixed to each other and do not separate. When the drawstring 26 is pulled, the snap point 251 moves downward away from the snap hole 111, so that the line-end connector 2 can be separated from the board-end connector 1 and the docking state is released.

[0035] like Figure 4 As shown, the retaining member 27 further includes a guide arm 271 and a positioning arm 272. The guide arm 271 is perpendicular to the positioning arm 272. The second shell 21 further includes a mounting slot 213 and an extension portion 214 disposed at the lower side of the mounting slot 213. The tongue plate 22 is inserted into the second shell 21 through the mounting slot 213 and exposed in the second receiving space P2, the guide arm 271 is inserted into the second shell 21 through the mounting slot 213, and the positioning arm 272 is pressed downward against the extension portion 214. In addition, the retaining member 27 further includes a plurality of protrusions 273 disposed on the guide arm 271 and the positioning arm 272, and a plurality of slots 215 are further disposed on both sides of the second shell 21. When the retaining member 27 is disposed on the second shell 21, the plurality of protrusions 273 are respectively engaged with the plurality of slots 215, so that the retaining member 27 is fixed to the second shell 21.

[0036] See also Figure 5 and Figure 6 As shown, Figure 5 and Figure 6The board - end connector 1 therein is actually a vertical socket connector, while the wire - end connector 2 is a plug connector. Therefore, the board - end connector 1 is vertically disposed on a circuit board (not shown in the figure) located in the YZ plane, and the socket of the board - end connector 1 is configured to face the negative X - axis direction. There is a first receiving space P1 between one side surface of the first housing 11 and the terminal block 13. When the wire - end connector 2 is vertically docked with the board - end connector 1 along the second direction (positive X - axis direction), the tongue plate 22 is inserted into the slot 130 of the terminal block 13 and the docking plate 29 is inserted into the first receiving space P1; and the first housing 11 is inserted into the second receiving space P2, so that the second housing 21 at least partially surrounds the first housing 11. The docked board - end connector 1 and wire - end connector 2 together form the electrical connector assembly D of the present invention.

[0037] As Figure 7 shown, since the wire - end connector 2 is inserted in the vertical direction, the cable assembly 3 has no structure to rely on for fixation, and is prone to shaking or bending, resulting in an unstable docking between the board - end connector 1 and the wire - end connector 2, affecting the stability of signal transmission. Therefore, in the present invention, by adding a metal frame 24 to the second housing 21, the board - end connector 1 can be completely covered by the second housing 21 and the metal frame 24 (visually, the board - end connector 1 is almost entirely inserted into the wire - end connector 2), and only the part connected and fixed to the circuit board is exposed, thereby strengthening the joint structure between the board - end connector 1 and the wire - end connector 2, so that the connection strength between the two connectors is not affected by the shaking or bending of the cable assembly 3, and further improving the stability of signal transmission.

[0038] However, the above - mentioned example is only one feasible embodiment and is not intended to limit the present invention. Referring to Figure 8 shown, Figure 8 is a schematic diagram of a second implementation form of the wire - end connector and the board - end connector according to the first embodiment of the present invention. The board - end connector 1 can also be a right - angled socket connector. That is, the board - end connector 1 is disposed on the XY plane (the plane where the circuit board B is located), and the socket of the board - end connector 1 is configured to face the negative X - axis direction. It should be noted that Figure 8 the size of the circuit board B in Figure 8 is only for illustration and does not represent the actual size. In fact, the circuit board B can extend to the wire - end connector 2. Therefore,

[0039] In other words, the wire-end connector 2 of the present invention is applicable to board-end connectors 1 of different types (vertical or right-angle). Further, since there is no situation where the cable assembly 3 shakes during the docking between the wire-end connector 2 and the right-angle board-end connector 1, which affects signal transmission, when the wire-end connector 2 docks with the right-angle board-end connector 1, the metal frame 24 can be disassembled, that is, the metal frame 24 is not required to strengthen the joint structure between the connectors.

[0040] Second Embodiment

[0041] Refer to Figure 9 and Figure 10 as shown Figure 9 which is a schematic diagram of the wire-end connector according to the second embodiment of the present invention, Figure 10 and is a cross-sectional schematic diagram of the wire-end connector according to the second embodiment of the present invention. The structure of the wire-end connector 2' in the second embodiment is similar to that of the wire-end connector 2 in the first embodiment, and the similar parts will not be described in detail. The main difference is that in the wire-end connector 2', the second receiving space P2 of the second housing 21 is composed of four side walls formed integrally, that is, the first side wall WL1, the second side wall WL2, the third side wall WL3 and the fourth side wall WL4. That is to say, the metal frame is omitted in the wire-end connector 2'.

[0042] Refer to Figure 11 as shown Figure 11 which is a schematic diagram of the wire-end connector and the board-end connector according to the second embodiment of the present invention. The board-end connector 1 is vertically arranged on a circuit board located in the YZ plane (not shown in the figure). When the wire-end connector 2' docks with the vertical board-end connector 1, the board-end connector 1 can be completely covered by the second housing 21 (visually, the board-end connector 1 is almost completely inserted into the wire-end connector 2), and only the part connected and fixed to the circuit board is exposed, thereby strengthening the joint structure between the board-end connector 1 and the wire-end connector 2, so that the connection strength between the two connectors will not be affected by the shaking or bending of the cable assembly 3, and further improving the stability of signal transmission.

[0043] Third Embodiment

[0044] Refer to Figure 12 and Figure 13 as shown Figure 12 which is a schematic diagram of the wire-end connector according to the third embodiment of the present invention, Figure 13 and is a partial exploded schematic diagram of the wire-end connector according to the third embodiment of the present invention. The structure of the wire-end connector 2'' in the third embodiment is similar to that of the wire-end connector 2 in the first embodiment, and the similar parts will not be described in detail. The main difference is that the wire-end connector 2'' further includes an insulating housing 28.

[0045] The insulating housing 28 has opposite a third opening P3 and a fourth opening P4. The third opening P3 communicates with the fourth opening P4, and the insulating housing 28 further has a notch 281 on the side where the third opening P3 is provided. The insulating housing 28 is detachably assembled to the wire-end connector 2". Specifically, the second housing 21 is inserted through the third opening P3, so that the insulating housing 28 completely surrounds the second housing 21, and the front end of the second housing 21 is disposed inside the insulating housing 28, while the elastic fastener 25 is at least partially (e.g., the rear end) exposed at the notch 281. A plurality of through holes 280 are provided on both sides of the insulating housing 28, and a plurality of screw holes 274 corresponding to the plurality of through holes 280 are provided on both sides of the holding member 27. The insulating housing 28 can be fixed to the wire-end connector 2" by a plurality of screw members 4 passing through the plurality of through holes 280 and the plurality of screw holes 274.

[0046] When the wire-end connector 2" is docked with a vertical board-end connector (not shown in the figure), the board-end connector can be inserted into the wire-end connector 2" through the fourth opening P4 and docked with the second housing 21, so that the conductive terminals of the board-end connector are electrically connected to the contact pads 23 of the wire-end connector 2" for signal transmission. Since the fourth opening P4 of the insulating housing 28 is composed of four side walls, namely the first side wall WL1, the second side wall WL2, the third side wall WL3 and the fourth side wall WL4, the board-end connector can be completely covered by the insulating housing 28, thereby strengthening the joint structure between the board-end connector 1 and the wire-end connector 2, so that the connection strength between the two connectors will not be affected by the gravity of the shaking or bending of the cable assembly 3, and further improving the stability of signal transmission.

[0047] Refer to Figure 14 as shown in Figure 14 a schematic diagram of the wire-end connector and the board-end connector according to the third embodiment of the present invention. Figure 14 shows the state when the wire-end connector 2" is docked with the right-angle board-end connector 1. The second housing 21 includes a docking board 29, a first side wall EL1 and a second side wall EL2. Further, there is a gap G between the docking board 29 and the first side wall EL1, and there is another gap G between the docking board 29 and the second side wall EL2. The two gaps G respectively receive the two side walls of the first housing 11 of the board-end connector 1. During docking, the insulating housing 28 of the wire-end connector 2" needs to be removed first, and then the wire-end connector 2" docks with the board-end connector 1 along the second direction (positive X-axis direction), so that the board-end connector 1 fixed on the circuit board B is inserted into the second receiving space P2 of the second housing 21 to complete the docking. At this time, the second side wall WL2 and the third side wall WL3 are located outside the first housing 11, and the first side wall WL1 is located inside the first housing 11.

[0048] Advantages of the embodiment

[0049] The electrical connector assembly and the wire-end connector provided by the present invention can strengthen the overall structural strength when the board-end connector and the wire-end connector are docked and increase the stability of signal transmission through the structural design that the second housing at least partially wraps the first housing.

[0050] Furthermore, in the present invention, by installing a metal frame member 24 on the second housing 21, the board-end connector 1 can be completely wrapped by the second housing 21 and the metal frame member 24 (visually, the board-end connector 1 is almost entirely inserted into the wire-end connector 2), and only the part connected and fixed to the circuit board is exposed, thereby strengthening the joint structure between the board-end connector 1 and the wire-end connector 2, so that the connection strength between the board-end connector 1 and the wire-end connector 2 will not be affected by the shaking or bending of the cable assembly 3, and further improving the stability of signal transmission.

[0051] The content disclosed above is only the preferred and feasible embodiment of the present invention, and does not limit the protection scope of the claims of the present invention. Therefore, all equivalent technical changes made by using the content of the specification and drawings of the present invention are included in the protection scope of the claims of the present invention.

Claims

1. An electrical connector assembly, characterized in that, The electrical connector assembly includes: A board - end connector for electrically connecting to a circuit board. The board - end connector includes a first housing, a slot, and a plurality of conductive terminals. The plurality of conductive terminals are disposed inside the slot; and A wire - end connector detachably docked to the board - end connector. The wire - end connector includes a second housing and a tongue plate. The wire - end connector has four side walls that jointly define a receiving space. The tongue plate is disposed within the receiving space. The tongue plate is connected to a cable assembly, and a plurality of contact pads are provided on the surface of the tongue plate; Wherein, when the board - end connector is docked with the wire - end connector, the tongue plate is inserted into the slot, such that the plurality of contact pads are in electrical contact with the plurality of conductive terminals, and the first housing is inserted into the receiving space.

2. The electrical connector assembly according to claim 1, wherein, The second housing includes a first side wall, a second side wall, and a third side wall. The wire - end connector further includes a metal frame member. The first side wall is connected between the second side wall and the third side wall. The metal frame member is detachably assembled to the second housing to jointly define the receiving space with the first side wall, the second side wall, and the third side wall.

3. The electrical connector assembly according to claim 2, wherein The metal frame member is used to be bent into a U - shaped structure. The metal frame member includes a first metal segment, a second metal segment, and a third metal segment respectively connected to both ends of the first metal segment. The second metal segment and the third metal segment are respectively detachably assembled to the second side wall and the third side wall.

4. The electrical connector assembly according to claim 3, wherein The second metal segment and the third metal segment each include a cantilever. Two locking grooves are respectively provided on both sides of the second housing; when the metal frame member is disposed on the second housing along a first direction, the two cantilevers are respectively locked in the two locking grooves, such that the metal frame member cannot be withdrawn along a second direction opposite to the first direction.

5. The electrical connector assembly according to claim 4, wherein, A plurality of limiting protrusions are provided on the side edge of the first metal segment. A plurality of limiting holes corresponding to the plurality of limiting protrusions are respectively provided at the bottom of the second housing; when the metal frame member is disposed on the second housing along the first direction, the plurality of limiting protrusions are respectively locked in the plurality of limiting holes.

6. The electrical connector assembly according to claim 1, wherein The first housing is made of a conductive material.

7. The electrical connector assembly according to claim 1, wherein, The wire - end connector further includes an elastic fastener, a pulling strap, and a holding member. The second housing further includes a clamping groove and a fixing post. The holding member has a guiding opening. The elastic fastener is disposed on the second housing. The pulling strap passes through the guiding opening, winds around the fixing post, and is located outside the elastic fastener.

8. The electrical connector assembly according to claim 1, wherein, The second housing includes an integrally formed first side wall, a second side wall, a third side wall, and a fourth side wall. The first side wall and the fourth side wall are connected between the second side wall and the third side wall. The first side wall, the second side wall, the third side wall, and the fourth side wall form the receiving space.

9. The electrical connector assembly according to claim 1, wherein, The wire-end connector further includes an insulating housing, the second housing is disposed within the insulating housing, and the insulating housing has a third opening; when the wire-end connector is docked with the board-end connector, the board-end connector is inserted through the third opening such that the insulating housing completely surrounds the second housing.

10. The electrical connector assembly according to claim 9, characterized in that, The wire-end connector further includes a retaining member, both sides of the insulating housing are provided with a plurality of through holes, and both sides of the retaining member are provided with a plurality of screw holes corresponding to the plurality of through holes respectively, and the insulating housing is fixed by a plurality of screw members passing through the plurality of through holes and the plurality of screw holes.

11. The electrical connector assembly according to claim 1, wherein, The wire-end connector further includes a docking plate, at least a part of the docking plate is located within the receiving space, and the board-end connector further includes another receiving space, and when the wire-end connector is docked with the board-end connector, the docking plate is inserted into the another receiving space.

12. The electrical connector assembly according to claim 11, wherein, The wire-end connector further includes an elastic fastener assembled on the docking plate and having at least one latching point, and the first housing has at least one latching hole, and when the wire-end connector is docked with the board-end connector, the at least one latching point and the at least one latching hole are latched with each other.

13. A wire-end connector, characterized in that, The wire-end connector includes: a housing assembly having four side walls to enclose a receiving space; a tongue plate, a part of which is disposed within the housing and connected to a cable assembly, and another part is exposed in the receiving space and provided with a plurality of contact pads; and an elastic fastener having a fixed end and a free end, the fixed end is fixed to the housing assembly and located within the receiving space, and the free end protrudes from the four side walls.

14. The wire-end connector according to claim 13, characterized in that, The housing assembly further includes a docking plate, and the fixed end of the elastic fastener is fixed to the docking plate.

15. The wire end connector according to claim 13, characterized in that, The housing assembly includes an insulating housing and a metal frame member, the insulating housing includes a first side wall, a second side wall and a third side wall, the first side wall is connected between the second side wall and the third side wall, and the metal frame member is detachably assembled to the insulating housing to jointly define the receiving space with the first side wall, the second side wall and the third side wall.

16. The wire end connector according to claim 13, wherein, The surface of the elastic fastener has at least one latching point, and one of the four side walls has a clamping groove, the elastic fastener is disposed on the housing assembly, and the at least one latching point is exposed out of the clamping groove.

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