CN111129826A

CN111129826A - wire connector

Info

Publication number: CN111129826A
Application number: CN202010006049.3A
Authority: CN
Inventors: 陈小明
Original assignee: Kunshan Luxshare Precision Industry Co Ltd
Current assignee: Kunshan Luxshare Precision Industry Co Ltd
Priority date: 2020-01-03
Filing date: 2020-01-03
Publication date: 2020-05-08

Abstract

A wire connector is disclosed, which includes a sheath and at least one first terminal, the sheath has an accommodating cavity, and the first terminal is connected with the first opening and the second opening intersecting with the communication direction of the accommodating cavity by arranging the first opening and the second opening on the sheath. The sheath is fixedly connected and the first terminal contact part is extended into the accommodating cavity of the sheath from the first opening, which can realize stable connection between the terminals, increase the effective overcurrent area, improve the bearing capacity of the wire connector, and can achieve An angled connection between terminals.

Description

Wire connector

Technical Field

The invention relates to the field of electromechanical elements, in particular to a wire connector.

Background

The power transmission between large-scale power equipment and between a power supply and large-scale electromechanical equipment is often the transmission of high voltage and large current, and the electrical connection between wires requires a wire connector capable of stably transmitting electric energy. In the prior art, the connector often adopts cylindrical male terminal and cylindrical female terminal to connect, and effective area of contact is less between the terminal, and the current-carrying capacity is relatively weak, and can only carry out the opposite direction connection between the terminal, is not convenient for realize the connection of looks slope between the terminal.

Disclosure of Invention

In view of this, embodiments of the present invention provide a wire connector, which can increase an effective contact area between terminals, improve a current guiding capability of the wire connector, and implement an inclined connection between the terminals.

The embodiment of the invention provides a wire connector, which comprises:

a sheath having a receiving cavity, the sheath having a first opening disposed in the first direction and a second opening disposed in a second direction, the first direction intersecting the second direction, the first opening and the second opening both communicating with the receiving cavity;

at least one first terminal configured to be fixedly connected to the sheath, the first terminal including a first cable connection portion for connection to a first conductor and a first terminal contact portion disposed at least partially within the receiving cavity, the first terminal contact portion configured to enter the receiving cavity from the first opening.

Preferably, the sheath second opening the wire connector further comprises:

at least one second terminal including a second cable connection portion for connection with a second wire and a second terminal contact portion for electrical connection with the first terminal, the second terminal contact portion entering the receiving cavity through the second opening.

Preferably, the wire connector further comprises:

at least one elastic contact piece is arranged in the accommodating cavity, at least one first cavity and a third opening communicated with the first cavity are formed in the elastic contact piece, the third opening corresponds to the second opening, and the first cavity is configured to accommodate the second terminal contact portion.

Preferably, the wire connector includes two elastic contacts, and the first terminal is disposed between the two elastic contacts.

Preferably, the wire connector includes a resilient contact, and the first cavity is further configured to receive the first terminal contact.

Preferably, the wire connector includes two of the second terminals, and the first terminal contact portion is disposed between the two second terminals.

Preferably, the elastic contact element is provided with at least one backstop elastic sheet, the sheath and/or the first terminal contact portion is provided with a corresponding backstop groove, and the backstop groove is configured to be matched with the backstop elastic sheet to position the elastic contact element.

Preferably, the sheath includes relative roof and the bottom plate that sets up, and connects roof one end with the first lateral wall of bottom plate one end, first opening with first lateral wall sets up relatively, be provided with the locating hole on the first lateral wall, first terminal contact site is provided with corresponding locating piece.

Preferably, the sheath includes a top plate and a bottom plate disposed opposite to each other, and a first side wall connecting one end of the top plate and one end of the bottom plate, and the first opening is disposed opposite to the first side wall.

Preferably, at least one limiting bump is further disposed on the top plate, the bottom plate and/or the first terminal contact portion, the limiting bump protrudes toward the accommodating cavity, and the limiting bump is configured to deform the elastic contact piece so as to limit a movement range of the second terminal in the accommodating cavity.

Preferably, at least one position limiting piece is disposed at the third opening of the elastic contact piece, the position limiting piece is perpendicular to the top plate and the bottom plate, and the position limiting piece is configured to contact with the top plate, the bottom plate and/or a side surface of the first terminal contact portion to limit the position of the elastic contact piece.

Preferably, at least one of the stopper pieces contacts with a side surface of the first terminal contact portion;

the first terminal contact portion is further provided with a stopper extending in the second direction, and the stopper is configured to cooperate with the stopper piece to limit the relative positions of the first terminal contact portion and the elastic contact piece.

Preferably, the sheath is provided with at least one connecting ear, the connecting ear extends from the first opening to the outside of the accommodating cavity, and the connecting ear is configured to be fixedly connected with the first terminal through a fixing piece.

Preferably, a plurality of contact spring pieces are arranged on the elastic contact piece, the contact spring pieces are arranged in parallel, the middle parts of the contact spring pieces protrude towards the first cavity, and the contact spring pieces are configured to be in contact with the second terminal.

Preferably, a bent portion is provided between the second cable connection portion and the second terminal contact portion of the second terminal so that the second cable connection portion and the second terminal contact portion are in different planes.

Preferably, the two second terminals are further configured to be able to be connected to each other through the second cable connection portion, and a distance between the second terminal contact portions of the two second terminals is configured to be not smaller than a thickness of the first terminal contact portion.

The embodiment of the invention provides a wire connector, which comprises a sheath and at least one first terminal, wherein the sheath is provided with an accommodating cavity, a first opening and a second opening are arranged on the sheath, the first opening and the second opening are intersected with the communication direction of the accommodating cavity, the first terminal is fixedly connected with the sheath, and a contact part of the first terminal extends into the accommodating cavity of the sheath from the first opening, so that the stable connection between the terminals can be realized, the effective overflowing area is increased, the bearing capacity of the wire connector is improved, and the connection of the terminals at a certain included angle can be realized.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

fig. 1 is a schematic perspective view of a wire connector according to an embodiment of the present invention;

fig. 2 is a schematic view showing a connection relationship of a sheath, a first terminal and an elastic contact piece according to an embodiment of the present invention;

FIG. 3 is an exploded view of the sheath, first terminal and resilient contact of the wire connector of an embodiment of the present invention;

FIG. 4 is a perspective view of a sheath according to an embodiment of the present invention;

FIG. 5 is a schematic perspective view of an elastic contact according to an embodiment of the present invention;

fig. 6 is a schematic perspective view of a first terminal according to an embodiment of the present invention.

Description of reference numerals:

DIR 1-first direction; DIR 2-second direction;

1-a sheath; 11-a containment chamber; 12-a first opening; 13-a second opening; 14-retaining groove; 15-a top plate; 16-a base plate; 17-a first side wall; 171-positioning holes; 18-a limit bump; 19-connecting lugs; 2-a first terminal; 21-a first cable connection; 22-first terminal contact; 221-a positioning block; 222-a limit bump; 223-a stop block; 23-a retaining groove; 3-a second terminal; 31-a second cable connection; 32-second terminal contact portion; 33-bending part; 4-a resilient contact; 41-a first cavity; 42-a third opening; 43-retaining spring plate; 44-a limiting sheet; 45-contact spring; 5-a fixing piece; 6-first conductor.

Detailed Description

The present invention will be described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of the present invention, certain specific details are set forth. It will be apparent to one skilled in the art that the present invention may be practiced without these specific details. Well-known methods, procedures, components and circuits have not been described in detail so as not to obscure the present invention.

Further, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

Unless the context clearly requires otherwise, throughout this specification, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, what is meant is "including, but not limited to".

In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are intended to be inclusive and mean that, for example, they may be fixedly connected or detachably connected or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

When an element or layer is referred to as being "on," "engaged to," "connected to" or "coupled to" another element or layer, it may be directly on, engaged, connected or coupled to the other element or layer or intervening elements or layers may be present. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Fig. 1 is a schematic perspective view of a wire connector according to an embodiment of the present invention. Fig. 2 and 3 are a schematic view of a connection relationship between the sheath, the first terminal, and the elastic contact piece, and a schematic view of an explosion structure, respectively, according to an embodiment of the present invention. As shown in fig. 1 to 3, the wire connector of the embodiment of the present invention includes a sheath 1 and at least one first terminal 2, the sheath 1 having a housing cavity 11, and a first opening 12 and a second opening 13 communicating with the housing cavity 11, the first opening 12 being disposed along a first direction DIR1, the second opening 13 being disposed along a second direction DIR2, wherein the first direction DIR1 intersects the second direction DIR 2. The first terminal 2 is fixedly connected with the sheath 1, the first terminal 2 includes a first cable connection portion 21 and a first terminal contact portion 22, the first cable connection portion 21 is used for being connected with the first conductor 6, and the first terminal contact portion 22 enters the accommodating cavity 11 from the first opening 12.

The wire connector further comprises a second terminal 3 corresponding to the first terminal 2, the second terminal 3 comprising a second cable connection portion 31 for connection with a second wire and a second terminal contact portion 32 for electrical connection with the first terminal 2, the second terminal contact portion 32 being accessible from the second opening 13 into the receiving cavity 11 and being electrically connected with the first terminal contact portion 22. The first and second

terminal contact portions

22 and 32 may be formed in a substantially flat plate shape, which increases the contact area between the first and

second terminals

2 and 3 and improves the current carrying capacity of the wire connector. The first cable connection portion 21 and the second cable connection portion 31 may be substantially flat plates, and the first cable connection portion 21 and the first conductive wire 6, and the second cable connection portion 31 and the second conductive wire may be electrically connected by pressure welding, ultrasonic welding, or the like. The first terminal 2 and the second terminal 3 can be manufactured by a stamping method, and the production efficiency can be improved.

Fig. 4 is a perspective view of a sheath according to an embodiment of the present invention. As shown in fig. 1 to 4, the first opening 12 of the sheath 1 is disposed along a first direction DIR1, and the second opening 13 is disposed along a second direction DIR2, wherein the first direction DIR1 intersects with the second direction DIR2, so as to prevent interference between other terminals when some of the terminals are inserted and removed, and to facilitate electrical connection between wires extending along different directions, and to be used in a narrow space. Optionally, the first direction DIR1 and second direction DIR2 are perpendicular.

Optionally, the sheath 1 may further have a fourth opening, which is opposite to the second opening 13, i.e., the sheath 1 completely penetrates in the second direction DIR2, whereby the second terminal contact 32 may also enter the accommodation cavity 11 from the fourth opening to be electrically connected with the first terminal 2.

Fig. 5 is a schematic perspective view of an elastic contact according to an embodiment of the present invention. As shown in fig. 5, in order to achieve good contact between the first terminal 2 and the second terminal 3 to ensure stability of the electrical connection, the wire connector may further include at least one elastic contact 4. The elastic contact 4 is disposed in the housing chamber 11, forming at least one first cavity 41 and a third opening 42 communicating with the first cavity 41. The third opening 42 corresponds to the second opening 13, and the second terminal contact portion 32 can enter the first cavity 41 from the third opening 42.

As shown in fig. 2, 3 and 5, the elastic contact 4 may have a cross-sectional structure approximately shaped as "Contraband" consisting essentially of three faces including a top face, a bottom face and a side face, which may be perpendicular to the top and bottom faces.

The elastic contact piece 4 may be provided with a plurality of contact spring pieces 45, the contact spring pieces 45 are arranged in parallel, the middle parts of the contact spring pieces 45 protrude towards the first cavity 41, and the contact spring pieces 45 are used for contacting with the second terminal contact portion 32. The contact spring 45 may be provided on the top and bottom surfaces of the elastic contact 4. The elastic contact piece 4 is made of a conductive material, and the contact elastic piece 45 has certain elasticity, so that when the second terminal 3 enters the first cavity 41, the contact elastic piece 45 can be in abutting contact with the second terminal 3, therefore, the elastic contact piece 4 can conduct the first terminal 2 and the second terminal 3 which are in contact with the elastic contact piece 4, the second terminal 3 can be relatively fixed, the second terminal 3 is prevented from moving and shifting to a certain degree, and the conduction area between the first terminal 2 and the second terminal 3 is increased. The provision of the resilient contact 4 also slows down the wear of the terminal surfaces and extends the life of the first terminal 2 and the second terminal 3. The contact spring 45 may be formed by cutting a plurality of parallel slots in the elastic contact 4 and then stamping or bending the slots.

The sheath 1 may include a top plate 15 and a bottom plate 16 which are oppositely disposed, and a first sidewall 17 connecting one end of the top plate 15 and one end of the bottom plate 16, the first opening 12 and the first sidewall 17 being oppositely disposed. Optionally, the first side wall 17 is substantially perpendicular to the top panel 15 and the bottom panel 16. The sheath 1 can be integrally formed by injection molding, stamping and the like, so that the assembly steps can be simplified, and the strength of the integral structure of the sheath 1 can be ensured.

Fig. 6 is a schematic perspective view of a first terminal according to an embodiment of the present invention. As shown in fig. 1-4 and fig. 6, an engaging lug 19 may be disposed at the first opening 12 of the sheath 1, the engaging lug 19 extends from the first opening 12 to a direction away from the accommodating cavity 11, and the first terminal 2 and the engaging lug 19 may be connected by a fixing member 5, so that the first terminal 2 and the sheath 1 are fixed to each other. For example, the engaging lug 19 and the first terminal 2 have corresponding engaging holes, and the fixing member 5 may be a bolt or a pin, and the engaging lug 19 and the first terminal 2 may be fixedly engaged by the bolt or the pin passing through the engaging holes of the engaging lug 19 and the first terminal 2. Preferably, the engaging lug 19 and the first terminal 2 can be connected by more than two fixing members 5, so that the relative rotation between the first terminal 2 and the sheath 1 can be prevented by only one fixing member 5.

The first sidewall 17 of the housing 1 may have a positioning hole 171, and the end of the first terminal contact portion 22 facing the first sidewall 17 has a protruding positioning block 221 corresponding to the positioning hole 171, so that the first terminal 2 can be prevented from shaking by the cooperation of the positioning hole 171 and the positioning block 221.

In an alternative embodiment, the wire connector has two elastic contact pieces 4, the first terminal contact portion 22 divides the accommodation chamber 11 into two spaces after entering the accommodation chamber 11 from the first opening 12, and the two elastic contact pieces 4 are respectively disposed in the two spaces on both sides of the first terminal 2, that is, the first terminal 2 is disposed between the two elastic contact pieces 4. Accordingly, the wire connector may include two second terminals 3, the second terminal contact portions 32 of the two second terminals 3 being respectively placed in the first cavities 41 of the two elastic contacts 4, i.e., the first terminal contact portions 22 being between the two second terminals 3 and the two elastic contacts 4. Of course, the two elastic contacts 4 may also be stacked on the same side of the first terminal 2, i.e., the two elastic contacts 4 are in contact with each other, and the two second terminals 3 are in conduction with each other and with the first terminal 2 through the elastic contacts 4.

In another alternative embodiment, the wire connector has one elastic contact 4, the top surface of the elastic contact 4 contacts with the top plate 15 of the sheath 1, the bottom surface of the elastic contact 4 contacts with the bottom plate 16 of the sheath 1, and the first terminal contact portion 22 and the second terminal contact portion 32 are both disposed in the first cavity 41 of the elastic contact 4. Alternatively, the first terminal contact portion 22 is provided in the middle of the accommodation chamber 11, dividing the accommodation chamber 11 into two spaces, and the two second terminal contact portions 32 are provided in the two spaces, respectively, and electrically connected to the first terminal contact portion 22, so that the contact area between the terminals can be increased.

Of course, it will be understood by those skilled in the art that the wire connector may be electrically connected to the first terminal 2 by only one second terminal 3, provided that the overload capability is sufficient.

In order to increase the current carrying capacity of the wire connector, a bent portion 33 is provided between the second cable connecting portion 31 and the second terminal contact portion 32 of the second terminal 3, so that the two second terminals 3 can be fixedly connected through the second cable connecting portion 31 and connected with the second wire, and the two second terminal contact portions 32 can be respectively inserted into the first cavity 41 from two sides of the first terminal contact portion 22 and electrically connected with the first terminal 2, thereby increasing the effective conductive area between the first wire 6 and the second wire and increasing the overload capacity of the wire connector. In order to make the second terminal contact portions 32 and the first terminal contact portions 22 parallel to each other so that the second terminals 3 can be inserted and removed smoothly and form a stable connection with the first terminals 2, the distance between the second terminal contact portions 32 of the two second terminals 3 should be not less than the thickness of the first terminal contact portions 22, and preferably, the distance between the second terminal contact portions 32 of the two second terminals 3 is adapted to the distance between the two first cavities 41 or the distance between two spaces into which one first cavity 41 is partitioned by the first terminal 2.

The elastic contact piece 4 can be provided with at least one retaining elastic sheet 43, the sheath 1 is provided with a corresponding retaining groove 14, and the retaining elastic sheet 43 is bent towards the retaining groove 14 and extends towards the direction close to the second opening 13. Because the retaining elastic sheet 43 has elasticity, the elastic contact element 4 can be smoothly placed into the accommodating cavity 11 from the second opening 13, when the elastic contact element 4 moves to the retaining groove 14, the retaining elastic sheet 43 returns to the original shape due to the enlargement of the accommodating space, and the retaining groove 14 blocks the retaining elastic sheet 43 from exiting the retaining groove 14 towards the second opening 13, so that the elastic contact element 4 is blocked from exiting from the second opening 13. When the elastic contact element 4 needs to be taken out from the second opening 13, a tool can be used to extend into the retaining groove 14 to press the retaining elastic sheet 43 to bend the retaining elastic sheet 43 towards the first cavity 41, or the top surface and the bottom surface of the elastic contact element 4 are pressed to make the retaining elastic sheet 43 exit from the retaining groove 14, so that the elastic contact element 4 can smoothly exit from the accommodating cavity 11 from the second opening 13.

Preferably, the top plate 15 and the bottom plate 16 of the sheath 1 are both provided with retaining grooves 14, the first terminal 2 can also be provided with corresponding retaining grooves 23, and the top surface and the bottom surface of the elastic contact element 4 are both provided with retaining elastic sheets 43, so that a retaining function can be better realized, and the elastic contact element 4 is prevented from being driven to move when the second terminal 3 is pulled out.

For better positioning of the elastic contact 4, the elastic contact 4 may further have a stopper piece 44, the stopper piece 44 is disposed at the third opening 42 of the elastic contact 4, the stopper piece 44 may be perpendicular to the top plate 15 and the bottom plate 16 of the sheath 1, and preferably, the stopper piece 44 is disposed on the edges of the top surface and the bottom surface of the elastic contact 4. Therefore, when the elastic contact 4 is pushed into a predetermined position from the second opening 13, the stopper piece 44 contacts the top plate 15, the bottom plate 16, and/or the side surface of the first terminal contact portion 22, thereby restricting the position of the elastic contact 4 and preventing the elastic contact 4 from entering the accommodating cavity 11 too deeply and being difficult to be taken out. The retaining elastic sheet 43, the retaining

grooves

14 and 23 and the limiting sheet 44 are matched, so that the elastic contact piece 4 can be prevented from being driven to move when the second terminal 3 is plugged and unplugged.

The top plate 15 and the bottom plate 16 of the sheath 1 may also have a limit projection 18 thereon for preventing the second terminal 3 from moving. The limiting convex block 18 protrudes towards the direction of the accommodating cavity 11, so that the elastic contact piece 4 deforms, the second terminal 3 is clamped, the second terminal 3 is prevented from moving, the second terminal 3 and the first terminal 2 can be fixed relatively, stable electric connection is achieved, high-current and high-voltage power transmission can be achieved, and meanwhile, the second terminal 3 is prevented from frequently moving to generate electric sparks, and danger is avoided. Preferably, the first terminal contact portion 22 may also be provided with a corresponding limit protrusion 222.

When the at least one stopper piece 44 is opposed to the side surface of the first terminal contact portion 22, the side surface of the first terminal contact portion 22 may be further provided with a stopper 223 protruding toward the outside, and the stopper 223 may be disposed at a position close to the first side wall 17. The stopper 223 is engaged with the stopper 44 to limit the relative position between the elastic contact piece 4 and the first terminal 2, thereby preventing the elastic contact piece from being displaced greatly.

To reduce costs and improve interchangeability between components, the second terminal 3 and the first terminal 2 may be manufactured in identical shapes.

The wire connector according to the embodiment of the present invention can be widely applied to various fields, such as connection between power devices, connection between large-sized electric devices and power supplies, and the like. The wire connector can be applied to specific devices according to actual needs and common knowledge in the field by those skilled in the art, and will not be described in detail herein.

The wire connector provided by the embodiment of the invention comprises a sheath 1 and at least one first terminal 2, wherein the sheath 1 is provided with an accommodating cavity 11, the sheath 1 is provided with a first opening 12 and a second opening 13 which are intersected with the communication direction of the accommodating cavity 11, the first terminal 2 is fixedly connected with the sheath 1, and a first terminal contact part 22 extends into the accommodating cavity 11 of the sheath 1 from the first opening 12, so that the stable connection between the terminals can be realized, the effective flow area is increased, the bearing capacity of the wire connector is improved, and the connection of certain included angle between the terminals can be realized.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A wire connector, comprising:

a sheath (1) having a receiving cavity (11), the sheath (1) having a first opening (12) arranged in the first direction (DIR1) and a second opening (13) arranged in a second direction (DIR2), the first direction (DIR1) intersecting the second direction (DIR2), the first opening (12) and the second opening (13) both communicating with the receiving cavity (11);

at least one first terminal (2) configured to be fixedly connected with the sheath (1), the first terminal (2) comprising a first cable connection portion (21) for connection with a first conductor (6) and a first terminal contact portion (22) at least partially arranged within the accommodation cavity (11), the first terminal contact portion (22) being configured to enter the accommodation cavity (11) from the first opening (12).

2. The wire connector of claim 1, further comprising:

at least one second terminal (3) comprising a second cable connection portion (31) for connection with a second conductor and a second terminal contact portion (32) for electrical connection with the first terminal (2), the second terminal contact portion (32) entering the accommodation chamber (11) through the second opening (13).

3. The wire connector of claim 2, further comprising:

at least one elastic contact piece (4) arranged in the accommodating cavity (11), the elastic contact piece (4) being formed with at least one first cavity (41) and a third opening (42) communicating with the first cavity (41), the third opening (42) corresponding to the second opening (13), the first cavity (41) being configured to accommodate the second terminal contact portion (32).

4. The wire connector according to claim 3, characterized in that it comprises two elastic contacts (4), said first terminal (2) being arranged between said two elastic contacts (4).

5. The wire connector according to claim 3, wherein said wire connector comprises a resilient contact (4), said first cavity (41) further configured to receive said first terminal contact portion (22).

6. The wire connector according to claim 4 or 5, characterized in that it comprises two of said second terminals (3), said first terminal contact portion (22) being arranged between said two second terminals (3).

7. The wire connector according to any one of claims 3-5, wherein at least one anti-backup spring (43) is provided on the elastic contact (4), and corresponding anti-backup grooves (14, 23) are provided on the sheath (1) and/or the first terminal contact portion (22), the anti-backup grooves (14, 23) being configured to cooperate with the anti-backup spring (43) to position the elastic contact (4).

8. The wire connector according to any one of claims 1-5, wherein the sheath (1) comprises a top plate (15) and a bottom plate (16) which are oppositely arranged, and a first side wall (17) connecting one end of the top plate (15) and one end of the bottom plate (16), the first opening (12) is oppositely arranged with the first side wall (17), the first side wall (17) is provided with a positioning hole (171), and the first terminal contact portion (22) is provided with a corresponding positioning block (221).

9. The wire connector according to any one of claims 3-5, wherein the sheath (1) comprises a top plate (15) and a bottom plate (16) which are oppositely arranged, and a first side wall (17) connecting one end of the top plate (15) and one end of the bottom plate (16), the first opening (12) being oppositely arranged to the first side wall (17).

10. The wire connector according to claim 9, wherein at least one limiting protrusion (18, 222) is further disposed on the top plate (15), the bottom plate (16) and/or the first terminal contact portion (22), the limiting protrusion (18, 222) protruding toward the accommodating cavity (11), the limiting protrusion (18, 222) being configured to deform the elastic contact piece (4) to limit a movement range of the second terminal (3) in the accommodating cavity (11).

11. The wire connector according to claim 9, wherein at least one position-limiting piece (44) is disposed at the third opening (42) of the elastic contact piece (4), the position-limiting piece (44) is perpendicular to the top plate (15) and the bottom plate (16), and the position-limiting piece (44) is configured to contact with the side surface of the top plate (15), the bottom plate (16) and/or the first terminal contact portion (22) to limit the position of the elastic contact piece (4).

12. The wire connector according to claim 11, wherein at least one of the stopper pieces (44) is in contact with a side surface of the first terminal contact portion (22);

the first terminal contact portion (22) is further provided with a stopper (223), the stopper (223) extends toward the second direction, and the stopper (223) is configured to cooperate with the stopper piece (44) to restrict the relative positions of the first terminal contact portion (22) and the elastic contact piece (4).

13. The wire connector according to any one of claims 1-5, wherein the sheath (1) is provided with at least one engaging lug (19), the engaging lug (19) extending from the first opening (12) to the outside of the receiving cavity (11), the engaging lug (19) being configured to be fixedly connected with the first terminal (2) by a fixing member (5).

14. The wire connector according to any one of claims 3-5, wherein a plurality of contact springs (45) are disposed on the elastic contact member (4), the contact springs (45) are disposed in parallel, a middle portion of the contact springs (45) protrudes toward the first cavity (41), and the contact springs (45) are configured to contact with the second terminal (3).

15. The wire connector according to any one of claims 2-5, characterized in that the second cable connection portion (31) and the second terminal contact portion (32) of the second terminal (3) have a bend (33) therebetween such that the second cable connection portion (31) and the second terminal contact portion (32) are in different planes.

16. The wire connector according to claim 15, wherein two second terminals (3) are further configured to be connectable to each other through the second cable connection portion (31), and a distance between second terminal contact portions (32) of the two second terminals (3) is configured to be not less than a thickness of the first terminal contact portion (22).