CN109066192B

CN109066192B - Plug connector

Info

Publication number: CN109066192B
Application number: CN201810638477.0A
Authority: CN
Inventors: 彭建民
Original assignee: Lotes Co Ltd
Current assignee: Lotes Co Ltd
Priority date: 2018-06-20
Filing date: 2018-06-20
Publication date: 2020-06-30
Anticipated expiration: 2038-06-20
Also published as: CN109066192A

Abstract

The invention discloses a plug connector, which is used for being inserted into a butt joint cavity of a socket connector forwards, and a convex rib is arranged on the upper wall surface of the butt joint cavity in a downward protruding mode, and the plug connector is characterized by comprising: a plurality of terminals for electrically connecting the socket connector; an insulating body for accommodating the terminal, wherein the insulating body is provided with a first upper surface and a second upper surface lower than the first upper surface; a locking piece positioned on the second upper surface and used for being buckled and matched with the socket connector; at least one blocking part which protrudes upwards from the second upper surface; when the plug connector is inserted into the butt joint cavity of the socket connector forwards, the lock catch piece is located outside the butt joint cavity, the blocking portion enters the butt joint cavity, and the blocking portion is located on one side of the convex rib in the left-right direction and used for blocking the convex rib, so that the offset of the blocking plug connector in the left-right direction is avoided, and the stable matching of the plug connector and the socket connector is guaranteed.

Description

Plug connector

Technical Field

The present invention relates to a plug connector, and more particularly, to a plug connector stably connected to a receptacle connector.

Background

The plug connector is forwardly matched with a socket connector and is provided with an insulating main body, a plurality of terminal grooves are formed in the insulating main body and used for accommodating a plurality of terminals, and the terminals are used for electrically connecting the socket connector. The insulating main body is provided with a first body and a second body extending upwards from the first body, and the width of the first body is smaller than that of the second body. An elastic locking fastener connected to the side of the first body and extending forwards.

The socket connector is provided with a butt joint seat, the butt joint seat is provided with a butt joint cavity for butt joint of the insulation body, the butt joint cavity is provided with a side wall, a convex block is arranged on the side wall in a protruding mode, and the convex block is matched with the elastic locking piece in a buckling mode to limit the plug connector and the socket connector in the front-back direction.

However, the buckle cooperation of lug and elasticity hasp piece is the spacing plug connector in front and back direction, and when plug connector received the ascending time of rocking of left right direction of external force effect emergence, elasticity hasp piece can follow insulator's rocking, takes place offset, breaks away from on the lug easily to cause the stable effect between plug connector and the socket connector not good.

Therefore, there is a need for a new plug connector that overcomes the above problems.

Disclosure of Invention

The invention aims to provide a plug connector which is stably connected with a socket connector.

In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a plug connector for in the butt joint chamber of a socket connector inserts forward, a fin is established to the downward protruding of last wall in butt joint chamber, its characterized in that includes: a plurality of terminals for electrically connecting the socket connector; an insulating body for accommodating the terminal, wherein the insulating body is provided with a first upper surface and a second upper surface lower than the first upper surface; a locking piece located on the second upper surface and used for being matched with the socket connector in a buckling mode; at least one blocking part which protrudes upwards from the second upper surface; when the plug connector is inserted into the butt joint cavity of the socket connector forwards, the lock catch piece is located outside the butt joint cavity, the blocking part enters the butt joint cavity, and the blocking part is located on one side of the convex rib in the left-right direction and used for blocking the convex rib.

Furthermore, a convex block extends upwards from the second upper surface, is positioned on one side of the locking piece and is used for abutting against the front end of the butt joint cavity.

Further, the height of the convex block is larger than or equal to that of the locking fastener.

Furthermore, the locking part is provided with a connecting part which is downwards connected with the second upper surface, and also provided with an elastic clamping hook which is formed by extending forwards from the connecting part, and at least one blocking part is positioned below the elastic clamping hook.

Furthermore, the insulation body is provided with a second side surface connected with the second upper surface, and at least one blocking part is arranged at the joint of the second upper surface and the second side surface.

Further, relative first side and a second side about the elasticity trip has, first side is comparatively the second side is closer to first upper surface is along the forward direction from the back, first side with the distance of direction about first upper surface keeps unchangeable, the second side with the distance of direction about first upper surface diminishes.

Further, the terminal comprises a signal terminal and a power terminal, the insulating body is provided with a first terminal groove and a second terminal groove which is larger than the first terminal groove, the first terminal groove is located below the first upper surface and used for containing the signal terminal, and the second terminal groove is located below the second upper surface and used for containing the power terminal.

Furthermore, the insulation body is provided with a partition wall which is positioned between the adjacent second terminal slots, and at least one blocking part is vertically aligned with the partition wall.

Furthermore, the insulation body is provided with a first side surface and a second side surface which are oppositely arranged at the left and right sides, the insulation body is further provided with a lower surface, the first side surface is connected with the first upper surface and the lower surface, the second side surface is connected with the second upper surface and the lower surface, a first hinge part extends from the first side surface to the second side surface to cross over the first terminal groove, the first hinge part can do rotary motion relative to the first side surface, a first clamping groove is concavely arranged on the first upper surface to be communicated with the first terminal groove, the signal terminal is provided with a limiting part, and when the first hinge part enters the first clamping groove, the first hinge part is positioned behind the limiting part and used for limiting the signal terminal to move backwards.

Furthermore, a second hinge portion extends from the first side surface to the second side surface and crosses over the second terminal groove, the second hinge portion can rotate relative to the first side surface, a second clamping groove is concavely formed in the lower surface to communicate the first terminal groove and the second terminal groove, the power terminal is provided with a stop portion, and when the second hinge portion enters the second clamping groove, the second hinge portion is located behind the limiting portion and the stop portion to prevent the signal terminal and the power terminal from being separated backwards.

Compared with the prior art, the concave part of the insulation body is internally provided with at least one stopping part, after the plug connector is inserted into the socket connector forwards, the at least one stopping part is accommodated in the butt joint cavity and is positioned on one side of the convex rib in the left-right direction for stopping the convex rib, so that the offset of the plug connector in the left-right direction is stopped, and the stable matching of the plug connector and the socket connector is ensured.

[ description of the drawings ]

Fig. 1 is a perspective view of a plug connector and a receptacle connector according to an embodiment of the present invention;

FIG. 2 is a perspective view of the plug connector and the receptacle connector of FIG. 1 from another perspective;

FIG. 3 is a top view of the plug connector of FIG. 1 not inserted into the receptacle connector;

FIG. 4 is a plan sectional view of the plug and receptacle connectors of FIG. 3 as viewed along section line A-A, looking to the right;

fig. 5 is a plan sectional view of the receptacle connector of fig. 4, as viewed along section line B-B;

figure 6 is a plan cross-sectional view of the plug connector of figure 4, as viewed rearwardly along section lines C-C;

fig. 7 is a top view of the plug connector of fig. 1 inserted into the receptacle connector;

fig. 8 is a plan view, looking rightwardly along section line D-D, of fig. 7, in cross-section, after assembly of the plug and receptacle connectors;

figure 9 is a rear plan view, in cross-section taken along line E-E of figure 8, of the plug and receptacle connector sets as viewed in a forward direction.

Detailed description of the embodiments reference is made to the accompanying drawings in which:

[ detailed description ] embodiments

For a better understanding of the objects, structure, features, and functions of the invention, reference should be made to the drawings and detailed description that follow.

Referring to fig. 1, fig. 2 and fig. 4, which are embodiments of a plug connector 100 according to the present invention, the plug connector 100 is inserted forward into a receptacle connector 200, the plug connector 100 has an insulative housing 1, a plurality of plug terminals 2 are received in the insulative housing 1, the receptacle connector 200 has a mating socket 3, the mating socket 3 has a mating surface 30, a mating cavity 301 is recessed from the mating surface 30, a plurality of receptacle terminals 4 are located in the mating cavity 301, when the plug connector 100 is mated with the receptacle connector 200, the insulative housing 1 enters the mating cavity 301, the plug terminals 2 are forward electrically contacted with the receptacle terminals 4, and a rear end of the plug terminals 2 is fixedly connected to a cable (not shown).

Referring to fig. 1, fig. 2 and fig. 3, the insulation body 1 has a first upper surface 110 and a second upper surface 120 which are arranged in a step manner, and the second upper surface 120 is lower than the first upper surface 110 in the vertical direction. The insulating body 1 has a lower surface 122 disposed opposite to the first upper surface 110 and the second upper surface 120. The insulating body 1 has a first side 111, a second side 121 and a third side 112 in the left-right direction, the first side 111 connects the first upper surface 110 and the lower surface 122, the second side 121 connects the second upper surface 120 and the lower surface 122, and the third side 112 connects the first upper surface 110 and the second upper surface 120, so that the first upper surface 110, the second upper surface 120 and the third side 112 together define a recess 113.

A locking member 14 extends upward and forward from the second upper surface 120 (of course, in other embodiments, the locking member 14 can also be assembled and connected to the second upper surface 120) and is located in the concave portion 113, the locking member 14 has a connecting portion 141 connected downward to the second upper surface 120, and an elastic hook 142 extends forward from the connecting portion 141 for being snap-fitted with the docking cradle 3. The elastic hook 142 is higher than the first upper surface 110, so that the distance between the elastic hook 142 and the second upper surface 120 is greater than the distance between the first upper surface 110 and the second upper surface 120, and a sufficient space for downward elastic deformation of the elastic hook 142 is ensured. The elastic hook 142 has a first side 1421 and a second side 1422 opposite to each other in the left-right direction, the first side 1421 is closer to the first upper surface 110 than the second side 1422, and along the forward direction from the back, the distance between the first side 1421 and the first upper surface 110 in the left-right direction is kept unchanged, the distance between the second side 1422 and the first upper surface 110 in the left-right direction is reduced, so that the width of the front end of the elastic hook 142 is smaller than the width of the rear end of the elastic hook 142, which ensures the elasticity of the elastic hook 142, and at the same time, the strength of the connecting portion 141 is kept, so that the plug connector 100 and the plug connector 200 are plugged in and unplugged, the latch 14 is not easy to break.

Referring to fig. 1, 3 and 6, two blocking portions (of course, one or more than two blocking portions may be provided in other embodiments) extend upward from the second upper surface 120, and the two blocking portions are respectively defined as a first blocking portion 151 and a second blocking portion 152. The first blocking portion 151 is located at a connection position of the second upper surface 120 and the second side surface 121, and connects front and rear surfaces of the insulating body 1. Referring to fig. 1 and 4, the second blocking portion 152 is located below the elastic hook 142.

Referring to fig. 1 and 5, the insulation body 1 further has a bump 153, and the bump 153 is located at one side of the elastic hook 142, connected to the third side 112, and spaced apart from the elastic hook 142. The bump 153 extends upward from the second upper surface 120 to be higher than the first upper surface 110. The protrusion 153 has an upper stop surface 1530 and a front stop surface 1531, wherein the resilient hook 142 passes forward beyond the front stop surface 1531.

The upper blocking surface 1530 is flush with the elastic hook 142 to protect the elastic hook 142, and the working principle is as follows: when the elastic hook 142 is engaged with the mating seat 3, the elastic hook 142 is partially exposed in the air, and when an external force is applied to the elastic hook 142 by other elements or human action, the upper blocking surface 1530 upwardly receives the applied force of other elements and human action, so as to protect the elastic hook 142 and prevent the elastic hook 142 from being separated from the mating seat 3 due to downward elastic deformation when the external force is applied, and therefore the protrusion 153 can ensure a good fixing effect between the plug connector 100 and the receptacle connector 200. In other embodiments, the upper stop surface 1530 may be disposed higher than the elastic hook 142.

The insulative housing 1 has a plurality of first terminal grooves 114 under the first upper surface 110, and the insulative housing 1 has a plurality of second terminal grooves 123 under the second upper surface 120. In this embodiment, the plurality of first terminal grooves 114 are arranged in two upper and lower rows, and all of the second terminal grooves 123 are arranged in one row with the first terminal grooves 114 in the lower row. The width of the first terminal groove 114 is smaller than the width of the second terminal groove 123. The insulative housing 1 has a spacer 124 between two adjacent second terminal slots 123, wherein the second stopping portion 152 is disposed corresponding to the spacer 124 up and down, so as to ensure the strength of the insulative housing 1.

From first upper surface 110 sets up a first draw-in groove 115 in the concave, first draw-in groove 115 link up in the last row first terminal groove 114 downwards, just first draw-in groove 115 extends right and runs through first side 111, have a first buckle face 1150 in the first draw-in groove 115, first buckle face 1150 towards first terminal groove 114 sets up. A second engaging groove 125 is recessed from the lower surface 122, and is upwardly communicated with the lower row of the first terminal grooves 114 and all of the second terminal grooves 123, and the second engaging groove 125 extends rightward to penetrate through the first lateral surface 111, and a second engaging surface 1250 is disposed in the second engaging groove 125, wherein the second engaging surface 1250 faces the second terminal grooves 123. The first card slot 115 and the second card slot 125 are arranged up and down correspondingly.

Referring to fig. 4, fig. 6 and fig. 7, the insulating housing 1 further has a first hinge portion 116 and a second hinge portion 126. The first hinge portion 116 has a first pivot 1160 and a first rotating portion 1161 extending leftward from the first pivot 1160. The first pivot 1160 is integrally formed with the first side surface 111 downward, and the first rotating part 1161 rotates in the left-right direction and the up-down direction with respect to the first pivot 1160. The first rotating portion 1161 extends from the first side surface 111 toward the second side surface 121 and crosses over the first terminal groove 114. The first rotating portion 1161 is screwed down into the first engaging groove 115 and is partially located in the first terminal groove 114 on the upper row. The first engaging surface 1150 stops the first rotating portion 1161 downward and prevents it from being disengaged from the first engaging groove 115.

The second hinge portion 126 has a second pivot 1260 and a second rotating portion 1261 extending leftwards from the second pivot 1260, wherein the second pivot 1260 is integrally connected with the first side surface 111 upward and is arranged corresponding to the first pivot 1160 in an up-and-down manner, the length of the second rotating portion 1261 is greater than that of the first rotating portion 1161, and the second rotating portion 1261 can perform a rotating motion in a left-and-right direction and in an up-and-down direction relative to the second pivot 1260. As shown in fig. 6 and 9, the second rotating portion 1261 is screwed into the second slot 125, and is partially located in the first terminal slot 114 and the second terminal slot 123 in the lower row. The second latching surface 1250 upwardly stops the second rotating portion 1261 from being disengaged from the second latching groove 125.

Referring to fig. 1, fig. 2 and fig. 4, the plurality of plug terminals 2 include a plurality of signal terminals 21 and a plurality of power terminals 22, wherein the width of the power terminal 22 is greater than the width of the signal terminal 21, the plurality of signal terminals 21 are respectively and correspondingly accommodated in the first terminal groove 114, and the plurality of power terminals 22 are respectively and correspondingly accommodated in the second terminal groove 123. Each signal terminal 21 has a limiting portion 210, and when the first rotating portion 1161 is screwed into the first terminal groove 114, the first rotating portion 1161 is located behind the limiting portion 210 to limit the backward movement of the upper row of signal terminals 21. Each of the power terminals 22 has a stop portion 220, and when the second rotating portion 1261 is screwed upwards into the first terminal groove 114 and the second terminal groove 123 in the lower row, the second rotating portion 1261 is located behind the plurality of limiting portions 210 and the plurality of stop portions 220 to stop the rear separation of the signal terminals 21 and the power terminals 22 in the lower row.

Referring to fig. 1, 3 and 5, the docking cradle 3 has a third upper surface 31a and a fourth upper surface 31b, the third upper surface 31a and the fourth upper surface 31b are stepped, and the third upper surface 31a is disposed higher than the fourth upper surface 31 b. The docking chamber 301 has an upper wall 32, and the upper wall 32 protrudes a rib 320 toward the inside of the docking chamber 301. The docking cradle 3 further has a locking portion 33 for snap-fitting with the locking piece 14. The locking portion 33 has a long vertical portion 331 and a short vertical portion 332 vertically connecting the third upper surface 31a and the fourth upper surface 31b downward, respectively, a beam portion 333 horizontally disposed to be engaged with the elastic hook 142 in the front-rear direction, the beam portion 333 connecting the long vertical portion 331 and the short vertical portion 332 with a gap from the fourth upper surface 31 b. The long vertical portion 331 and the protruding rib 320 are disposed in a vertical direction to enhance the strength of the docking station 3. The locking portion 33 and the fourth upper surface 31b form a receiving space S for receiving a portion of the elastic hook 142.

Referring to fig. 7, 8 and 9, after the plug connector 100 is inserted into the receptacle connector 200, the insulative housing 1 is received in the mating cavity 301, the locking member 14 is inserted into the receiving space S beyond the mating surface 30, the elastic hook 142 is located between the long vertical portion 331 and the short vertical portion 332 and keeps a gap therebetween, and the elastic hook 142 passes over the beam portion 333 forward and engages with the front end of the beam portion 333 to limit the plug connector 100 in the front-rear direction, so as to prevent the insulative housing 1 from being separated from the mating cavity 301 in the rear-front direction. The long vertical portion 331 and the short vertical portion 332 limit the elastic hook 142 in the left and right directions and protect the elastic hook 142.

The front stop 1531 abuts against the mating face 30 to prevent the plug connector 100 from being inserted into the mating cavity 301 too far forward.

The first blocking portion 151 is accommodated in the docking cavity 301 and located on the left side of the protruding rib 320, and the protruding rib 320 is stopped to the right, so that the plug connector 100 is stopped from shifting to the right. The second blocking portion 152 is accommodated in the mating cavity 301, and is located on the right side of the protruding rib 320, and stops the protruding rib 320 to the left, so as to stop the plug connector 100 from shifting to the left. The protruding rib 320 is located between the first blocking portion 151 and the first blocking portion 151, and slight gaps exist among the first blocking portion 151, the second blocking portion 152, the second upper surface 120 and the protruding rib 320, so that the plug connector 100 is not subjected to the first blocking portion 151 and the second blocking portion 152 and the backward friction force of the second upper surface 120 on the plug connector 100 in the process of being inserted into the mating cavity 301 forward, and the abrasion of the insulation body 1 is reduced.

First fender portion 151 with second fender portion 152 is located go up the wall 32 below, just first fender portion 151 with second fender portion 152 is all from second upper surface 120 is protruding to be stretched, has guaranteed plug connector 100 rocks in the upper and lower direction and when taking place the offset, first fender portion 151 with second fender portion 152 can with go up wall 32 butt, second upper surface 120 with there is the clearance all the time between the wall 32, be favorable to the plug connector 100 after the equipment with the heat dissipation between the socket connector 200.

In summary, the plug connector of the present invention has the following advantages:

1. after the plug connector 100 is inserted into the receptacle connector 200, the first blocking portion 151 is received in the mating cavity 301 and located on the left side of the rib 320, and the rib 320 is stopped to the right, so that the plug connector 100 is stopped from shifting to the right. The second stopping portion 152 is accommodated in the mating cavity 301 and located at the right side of the protruding rib 320, and stops the protruding rib 320 leftwards to stop the plug connector 100 from shifting leftwards. The first blocking portion 151 and the second blocking portion 152 respectively form a blocking effect with the rib 320 in the left-right direction, so as to limit the plug connector 100 in the receptacle connector 200 in the left-right direction, and stabilize the fixed connection therebetween.

2. The first blocking portion 151 and the second blocking portion 152 are opposite to the upper wall surface 32, and the first blocking portion 151 and the second blocking portion 152 both protrude from the second upper surface 120, so that when the plug connector 100 rocks in the up-down direction and shifts, the first blocking portion 151 and the second blocking portion 152 can be abutted to the upper wall surface 32, a gap is always formed between the second upper surface 120 and the upper wall surface 32, and heat dissipation between the assembled plug connector 100 and the socket connector 200 is facilitated.

3. The upper blocking surface 1530 is flush with the elastic hook 142, when the elastic hook 142 is in snap fit with the docking seat 3, a part of the elastic hook 142 is exposed in the air, and when an external force is applied to the elastic hook 142 by other elements or human action, the upper blocking surface 1530 upwards bears the applied force of other elements and human action, thereby protecting the elastic hook 142 and preventing the elastic hook 142 from being separated from the docking seat 3 due to downward elastic deformation when the external force is applied, so that the bump 153 can ensure that the fixing effect between the plug connector 100 and the socket connector 200 is good.

4. The elastic hook 142 has a first side 1421 and a second side 1422 oppositely disposed left and right, the first side 1421 is closer to the first upper surface 110 than the second side 1422, the direction from the back to the front is followed, the distance between the first side 1421 and the first upper surface 110 along the left and right directions is kept unchanged, the distance between the second side 1422 and the first upper surface 110 along the left and right directions is reduced, the width of the front end of the elastic hook 142 is smaller than that of the rear end of the elastic hook 142, the elasticity of the elastic hook 142 is ensured, the strength of the connecting portion 141 can be kept, the plug connector 100 and the socket connector 200 are plugged in and unplugged, and the latch 14 is not easy to break.

The above detailed description is only for the purpose of illustrating the preferred embodiments of the present invention, and not for the purpose of limiting the scope of the present invention, therefore, all technical changes that can be made by applying the present specification and the drawings are included in the scope of the present invention.

Claims

1. A plug connector for mating with a receptacle connector, the receptacle connector having a mating surface, a mating cavity formed by the mating surface of the receptacle connector, the plug connector being inserted forward into the mating cavity of the receptacle connector, a rib being formed on an upper wall of the mating cavity of the receptacle connector and protruding downward, the plug connector comprising:

a plurality of terminals for electrically connecting the socket connector;

an insulating body for accommodating the terminal, the insulating body having a first upper surface and a second upper surface lower than the first upper surface, the insulating body having a lower surface disposed opposite to the first upper surface and the second upper surface, a portion of the insulating body between the first upper surface and the lower surface defining a first portion, a portion of the insulating body between the second upper surface and the lower surface defining a second portion, a height of the first portion in an up-down direction being greater than a height of the second portion in the up-down direction;

a locking piece located on the second upper surface and used for being matched with the socket connector in a buckling mode;

at least one blocking part which protrudes upwards from the second upper surface;

when the plug connector is positioned at the correct insertion position, the first part and the second part are smoothly inserted forwards into the butting cavity of the socket connector, the locking piece is positioned outside the butting cavity of the socket connector, the blocking part enters the butting cavity of the socket connector, and the blocking part is positioned at one side of the convex rib in the left-right direction and is used for blocking the convex rib;

when the plug connector is positioned at an incorrect insertion position, the first part is stopped by the abutting surface of the socket connector so that the whole plug connector is stopped outside the abutting cavity of the socket connector.

2. The plug connector of claim 1, wherein: and a convex block extends upwards from the second upper surface, is positioned on one side of the locking piece and is used for abutting against the front end of the butt joint cavity of the socket connector.

3. The plug connector of claim 2, wherein: the height of the convex block is greater than or equal to that of the locking fastener.

4. The plug connector of claim 1, wherein: the lock catch piece is provided with a connecting part which is downwards connected with the second upper surface and an elastic clamping hook which is formed by extending forwards from the connecting part, and at least one blocking part is positioned below the elastic clamping hook.

5. The plug connector of claim 4, wherein: the insulating body is provided with a second side surface connected with the second upper surface, and at least one blocking part is arranged at the joint of the second upper surface and the second side surface.

6. The plug connector of claim 5, wherein: elastic clamping hook has about relative a first side and a second side, first side is comparatively the second side is closer to first upper surface is along the forward direction from the back, first side with the distance of direction about first upper surface keeps unchangeable, the second side with the distance of direction diminishes about first upper surface follows.

7. The plug connector of claim 1, wherein: the terminal comprises a signal terminal and a power terminal, the insulating body is provided with a first terminal groove and a second terminal groove which is larger than the first terminal groove, the first terminal groove is located below the first upper surface and used for containing the signal terminal, and the second terminal groove is located below the second upper surface and used for containing the power terminal.

8. The plug connector of claim 7, wherein: the insulation body is provided with a partition wall which is positioned between the adjacent second terminal slots, and at least one blocking part is vertically aligned with the partition wall.

9. The plug connector of claim 7, wherein: the insulation body is provided with a first side face and a second side face which are oppositely arranged at the left side and the right side, the first side face is connected with the first upper surface and the lower surface, the second side face is connected with the second upper surface and the lower surface, a first hinge part extends from the first side face to the second side face to cross a first terminal groove, the first hinge part can be opposite to the first side face to do rotary motion, a first clamping groove communicated with the first terminal groove is concavely arranged on the first upper surface, the signal terminal is provided with a limiting part, and the first hinge part enters the first clamping groove and is located behind the limiting part to limit the backward movement of the signal terminal.

10. The plug connector of claim 9, wherein: a second hinge portion extends from the first side surface to the second side surface and crosses the second terminal groove, the second hinge portion is capable of rotating relative to the first side surface, a second clamping groove is concavely formed on the lower surface to communicate the first terminal groove and the second terminal groove, the power terminal is provided with a stop portion, and when the second hinge portion enters the second clamping groove, the second hinge portion is located behind the limiting portion and the stop portion to prevent the signal terminal and the power terminal from being separated backwards.