Terminal assembly and electrical connector

Abstract

The utility model provides a kind of terminal assembly and electric connector.The terminal assembly includes first terminal and second terminal.The first terminal includes: first clamping part, for clamping and electrically connecting first wire;And elastic clip.The second terminal includes: second clamping part, for clamping and electrically connecting second wire;And plug-in tongue part.The plug-in tongue part is inserted into the elastic clip, and the elastic clip clamps the plug-in tongue part inserted, to realize the electric connection between the first terminal and the second terminal.The terminal assembly of the utility model can realize the electric connection of wire of different diameters.It is convenient to assemble, saves space and manufacturing cost, and improves production efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of terminal assembly, in particular to a terminal assembly of an electrical connector. BACKGROUND

[0002] In the prior art, an electrical connector can only be used to receive and pierce a wire of the same size to achieve electrical connection. When wires of different sizes need to be electrically connected, additional connecting devices are required for connection. This connection method requires additional space and connecting devices, and the installation operation is complex. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at solving at least one aspect of the above problems and defects existing in the prior art.

[0004] According to one aspect of the utility model, a terminal assembly is provided. The terminal assembly comprises: a first terminal and a second terminal. The first terminal comprises: a first clamping portion for clamping and electrically connecting a first wire; and an elastic clamp. The second terminal comprises: a second clamping portion for clamping and electrically connecting a second wire; and a tongue portion. The tongue portion is inserted into the elastic clamp, and the elastic clamp clamps the inserted tongue portion to achieve electrical connection between the first terminal and the second terminal.

[0005] According to one exemplary embodiment of the utility model, the first clamping portion is recessed upward from the bottom of the first terminal and extends through the first terminal in the longitudinal direction; and the second clamping portion is recessed upward from the bottom of the second terminal and extends through the second terminal in the longitudinal direction.

[0006] According to another exemplary embodiment of the utility model, the first terminal comprises a front elastic arm and a rear elastic arm arranged opposite in the longitudinal direction, and the elastic clamp is formed between the front elastic arm and the rear elastic arm.

[0007] According to another exemplary embodiment of the utility model, the first terminal comprises a first left U-shaped arm and a first right U-shaped arm. The first left U-shaped arm and the first right U-shaped arm are arranged apart in the transverse direction, thereby forming the first clamping portion between the first left U-shaped arm and the first right U-shaped arm. The first left U-shaped arm has a first left piercing wall, and the first right U-shaped arm has a first right piercing wall. The distance between the first left piercing wall and the first right piercing wall in the transverse direction is less than the diameter of the first wire, so that the first left piercing wall and the first right piercing wall can jointly pierce the insulating layer of the first wire.

[0008] According to another exemplary embodiment of the present application, the first terminal further comprises a first front connecting plate and a first rear connecting plate. The first front connecting plate is located above the front elastic arm, the first left U-shaped arm and the first right U-shaped arm, and connects the front elastic arm, the front part of the first left U-shaped arm and the front part of the first right U-shaped arm. The first rear connecting plate is located above the rear elastic arm, the first left U-shaped arm and the first right U-shaped arm, and connects the rear elastic arm, the rear part of the first left U-shaped arm and the rear part of the first right U-shaped arm.

[0009] According to another exemplary embodiment of the present application, the elastic clip is located at the right side of the first left U-shaped arm and the first right U-shaped arm.

[0010] According to another exemplary embodiment of the present application, the first terminal further comprises a first spacer. The first spacer extends longitudinally rearward from the first front connecting plate, so as to avoid the first front connecting plate and the first rear connecting plate being too close.

[0011] According to another exemplary embodiment of the present application, the bottom of the first left U-shaped arm and the first right U-shaped arm forms a first receiving hole.

[0012] According to another exemplary embodiment of the present application, the second terminal comprises a second left U-shaped arm and a second right U-shaped arm. The second left U-shaped arm and the second right U-shaped arm are arranged apart in the transverse direction, so as to form the second clamping part between the second left U-shaped arm and the second right U-shaped arm. The second left U-shaped arm has a second left puncture wall, and the second right U-shaped arm has a second right puncture wall. The distance between the second left puncture wall and the second right puncture wall in the transverse direction is less than the diameter of the second wire, so that the second left puncture wall and the second right puncture wall can jointly puncture the insulating layer of the second wire.

[0013] According to another exemplary embodiment of the present application, the second terminal further comprises a second front connecting plate and a second rear connecting plate. The second front connecting plate is located above the plug-in tongue part, the second left U-shaped arm and the second right U-shaped arm, and connects the plug-in tongue part, the front part of the second left U-shaped arm and the front part of the second right U-shaped arm. The second rear connecting plate is located above the second left U-shaped arm and the second right U-shaped arm, and connects the rear part of the second left U-shaped arm and the rear part of the second right U-shaped arm.

[0014] According to another exemplary embodiment of the present application, the plug-in tongue part is located at the left side of the second left U-shaped arm and the second right U-shaped arm.

[0015] According to another exemplary embodiment of the present application, the second terminal further comprises a second spacer. The second spacer extends rearwardly from the second front connecting plate in the longitudinal direction, thereby avoiding the second front connecting plate and the second rear connecting plate from being too close to each other.

[0016] According to another exemplary embodiment of the present application, the bottom of the second left U-shaped arm and the second right U-shaped arm forms a second receiving hole.

[0017] According to another aspect of the present application, an electrical connector is provided. The electrical connector comprises: the terminal assembly as described above; and a housing having a receiving cavity with an upper opening. The terminal assembly is capable of being inserted into the receiving cavity from the upper opening and retained in the receiving cavity.

[0018] According to an exemplary embodiment of the present application, a through hole is provided on the terminal assembly in the longitudinal direction, and a protrusion is provided on the sidewall of the housing in the longitudinal direction. When the terminal assembly is inserted into the housing, the front elastic arm and the rear elastic arm of the first terminal are deformed to move towards each other in the longitudinal direction, thereby allowing the protrusion to be accommodated in the through hole to limit the terminal assembly.

[0019] According to another exemplary embodiment of the present application, the through hole is provided above the elastic clip.

[0020] According to another exemplary embodiment of the present application, a pair of protrusions are further provided on the housing, which are provided on a pair of sidewalls of the receiving cavity in the longitudinal direction.

[0021] According to another exemplary embodiment of the present application, a first positioning rod and a second positioning rod are further provided on the housing, which extend upwardly from the bottom wall of the receiving cavity and are respectively used for passing through the first receiving hole of the first terminal and the second receiving hole of the second terminal.

[0022] According to another exemplary embodiment of the present application, a first slot and a second slot are further provided on the housing, which are respectively used for receiving the first wire and the second wire. The first slot and the second slot extend in the longitudinal direction and are recessed downwardly from the upper surface of the housing. When the terminal assembly is inserted into the housing, the first clamping portion of the first terminal is aligned with the first slot in the longitudinal direction, and the second clamping portion of the second terminal is aligned with the second slot in the longitudinal direction.

[0023] In the foregoing exemplary embodiments of the present application, the terminal assembly can realize electrical connection of wires with different diameters. The assembly is convenient, saves space and manufacturing cost, and improves production efficiency.

[0024] Other objects and advantages of the present application will become apparent from the following detailed description taken in conjunction with the accompanying drawings, which illustrate, by way of example, the principles of the application. It is to be understood that this application is not limited to the methodology set forth herein, but can be practiced with modification and alteration within the scope and spirit of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0025] The features and advantages of the present application can be better understood with regard to the drawings, wherein like numerals indicate like parts, and wherein: Figure 1 shows a perspective view of an electrical connector according to an example embodiment of the present application; Figure 2 shows an exploded view of an electrical connector according to an example embodiment of the present application; Figure 3 shows a perspective view of a first terminal according to an example embodiment of the present application; Figure 4 shows another perspective view of a first terminal according to an example embodiment of the present application; Figure 5 shows a perspective view of a second terminal according to an example embodiment of the present application; Figure 6 shows another perspective view of a second terminal according to an example embodiment of the present application; Figure 7 shows a perspective view of a housing according to an example embodiment of the present application; Figure 8 shows a longitudinal sectional view of an electrical connector according to an example embodiment of the present application. DETAILED DESCRIPTION

[0026] The technical solutions of the present application will be further described in detail below with reference to the embodiments and in conjunction with the drawings. In the description, identical or similar reference numerals indicate identical or similar parts. The following description of the embodiments of the present application with reference to the drawings is intended to explain the general inventive concept of the present application, and should not be understood as a limitation of the present application.

[0027] In addition, in the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the present disclosure. However, it will be apparent to one skilled in the art that one or more embodiments can be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to avoid obscuring the accompanying drawings.

[0028] According to one general technical concept of the present application, a terminal assembly is provided. The terminal assembly comprises: a first terminal and a second terminal. The first terminal comprises: a first clamping portion for clamping and electrically connecting a first wire; and an elastic clamp. The second terminal comprises: a second clamping portion for clamping and electrically connecting a second wire; and a plug-in portion. The plug-in portion is inserted into the elastic clamp, and the elastic clamp clamps the inserted plug-in portion to achieve electrical connection between the first terminal and the second terminal.

[0029] According to another general technical concept of the present application, an electrical connector is provided. The electrical connector comprises: the above terminal assembly; and a housing having a cavity with an upper opening. The terminal assembly can be inserted into the cavity from the upper opening and retained in the cavity.

[0030] Figure 1 A perspective view of an electrical connector according to one exemplary embodiment of the present application is shown; Figure 2 An exploded view of an electrical connector according to one exemplary embodiment of the present application is shown; Figure 3 A perspective view of a first terminal according to one exemplary embodiment of the present application is shown; Figure 4 Another perspective view of a first terminal according to one exemplary embodiment of the present application is shown; Figure 5 A perspective view of a second terminal according to one exemplary embodiment of the present application is shown; Figure 6 Another perspective view of a second terminal according to one exemplary embodiment of the present application is shown; Figure 7 A perspective view of a housing according to one exemplary embodiment of the present application is shown; Figure 8 A longitudinal sectional view of an electrical connector according to one exemplary embodiment of the present application is shown.

[0031] As Figures 1-8 shown in one exemplary embodiment of the present application, a terminal assembly is disclosed, which comprises a first terminal 1 and a second terminal 2. The first terminal 1 comprises a first clamping portion 11 and an elastic clamp 12. The first clamping portion 11 is used for clamping and electrically connecting a first wire 3. The second terminal 2 comprises a second clamping portion 21 and a plug-in portion 22. The second clamping portion 21 is used for clamping and electrically connecting a second wire 4. The plug-in portion 22 is inserted into the elastic clamp 12, and the elastic clamp 12 clamps the inserted plug-in portion 22 to achieve electrical connection between the first terminal 1 and the second terminal 2.

[0032] As Figures 1-8 shown in the illustrated embodiment, the first clamping portion 11 is formed by upwardly recessing from the bottom of the first terminal 1 and extends through the first terminal 1 in the longitudinal direction. The second clamping portion 21 is formed by upwardly recessing from the bottom of the second terminal 2 and extends through the second terminal 2 in the longitudinal direction.

[0033] As shown in FIG. 1, in the illustrated embodiment, the first terminal 1 includes a front elastic arm 13 and a rear elastic arm 14 disposed opposite to each other in the longitudinal direction, and a resilient clamp 12 is formed between the front elastic arm 13 and the rear elastic arm 14. Figures 1-8

[0034] As shown in FIG. 2, in the illustrated embodiment, the first terminal 1 includes a first left U-shaped arm 151 and a first right U-shaped arm 152. The first left U-shaped arm 151 and the first right U-shaped arm 152 are disposed apart from each other in the lateral direction, thereby forming a first clamping portion 11 between the first left U-shaped arm 151 and the first right U-shaped arm 152. The first left U-shaped arm 151 has a first left piercing wall 153, and the first right U-shaped arm 152 has a first right piercing wall 154. The first left piercing wall 153 and the first right piercing wall 154 are disposed at a distance smaller than the diameter of the first wire 3 in the lateral direction, so that the first left piercing wall 153 and the first right piercing wall 154 can collectively pierce the insulating layer of the first wire 3. Figures 1-8

[0035] Figures 1-8 As shown in FIG. 3, in the illustrated embodiment, the first terminal 1 further includes a first front connecting plate 161 and a first rear connecting plate 162. The first front connecting plate 161 is disposed above the front elastic arm 13, the first left U-shaped arm 151 and the first right U-shaped arm 152, and connects the front elastic arm 13, a front portion of the first left U-shaped arm 151 and a front portion of the first right U-shaped arm 152. The first rear connecting plate 162 is disposed above the rear elastic arm 14, the first left U-shaped arm 151 and the first right U-shaped arm 152, and connects the rear elastic arm 14, a rear portion of the first left U-shaped arm 151 and a rear portion of the first right U-shaped arm 152.

[0036] Figures 1-8 As shown in FIG. 4, in the illustrated embodiment, the resilient clamp 12 is disposed to the right of the first left U-shaped arm 151 and the first right U-shaped arm 152.

[0037] Figures 1-8 As shown in FIG. 5, in the illustrated embodiment, the first terminal 1 further includes a first spacer 17. The first spacer 17 extends rearward from the first front connecting plate 161 in the longitudinal direction, thereby avoiding the first front connecting plate 161 and the first rear connecting plate 162 from being too close to each other.

[0038] Figures 1-8 As shown in FIG. 6, in the illustrated embodiment, the bottom of the first left U-shaped arm 151 and the first right U-shaped arm 152 forms a first receiving hole 18.

[0039] Figures 1-8 ​​​​​​​As shown in the illustrated embodiment, the second terminal 2 includes a second left U-shaped arm 251 and a second right U-shaped arm 252. The second left U-shaped arm 251 and the second right U-shaped arm 252 are spaced apart laterally, thereby forming a second clamping portion 21 between the second left U-shaped arm 251 and the second right U-shaped arm 252. The second left U-shaped arm 251 has a second left piercing wall 253, and the second right U-shaped arm 252 has a second right piercing wall 254. The lateral distance between the second left piercing wall 253 and the second right piercing wall 254 is less than the diameter of the second conductor 4, thereby enabling the second left piercing wall 253 and the second right piercing wall 254 to jointly pierce the insulation layer of the second conductor 4.

[0040] like Figures 1-8 As shown in the illustrated embodiment, the second terminal 2 further includes a second front connecting plate 261 and a second rear connecting plate 262. The second front connecting plate 261 is located above the tongue portion 22, the second left U-shaped arm 251, and the second right U-shaped arm 252, and connects the tongue portion 22, the front portion of the second left U-shaped arm 251, and the front portion of the second right U-shaped arm 252. The second rear connecting plate 262 is located above the second left U-shaped arm 251 and the second right U-shaped arm 252, and connects the rear portion of the second left U-shaped arm 251 and the rear portion of the second right U-shaped arm 252.

[0041] like Figures 1-8 As shown, in the illustrated embodiment, the tongue portion 22 is located to the left of the second left U-shaped arm 251 and the second right U-shaped arm 252.

[0042] like Figures 1-8 As shown in the illustrated embodiment, the second terminal 2 further includes a second spacer 27. The second spacer 27 extends longitudinally rearward from the second front connecting plate 261 to prevent the distance between the second front connecting plate 261 and the second rear connecting plate 262 from being too close.

[0043] like Figures 1-8 As shown in the illustrated embodiment, the bottom of the second left U-shaped arm 251 and the second right U-shaped arm 252 forms a second receiving hole 28.

[0044] like Figures 1-8 As shown, in an exemplary embodiment of the present invention, an electrical connector is disclosed. The electrical connector includes a terminal assembly and a housing 5 as described in any of the above embodiments. The housing 5 has a cavity 51 with an upper opening 52. The terminal assembly can be inserted into the cavity 51 through the upper opening 52 and held within the cavity 51.

[0045] like Figures 1-8As shown in the illustrated embodiment, the terminal assembly has a through hole 19 extending longitudinally, and the side wall of the housing 5 has a protrusion 53 extending longitudinally. When the terminal assembly is inserted into the housing 5, the front elastic arm 13 and the rear elastic arm 14 of the first terminal 1 deform to move towards each other longitudinally, thereby allowing the protrusion 53 to be accommodated in the through hole 19 to limit the terminal assembly.

[0046] like Figures 1-8 As shown, in the illustrated embodiment, the through hole 19 is disposed above the elastic clip 12.

[0047] like Figures 1-8 As shown in the illustrated embodiment, the housing 5 is further provided with a pair of protrusions 53, which are disposed on a pair of longitudinal sidewalls of the cavity 51.

[0048] like Figures 1-8 As shown in the illustrated embodiment, the housing 5 is further provided with a first positioning rod 541 and a second positioning rod 542, which extend upward from the bottom wall of the cavity 51 and are respectively used to pass through the first receiving hole 18 of the first terminal 1 and the second receiving hole 28 of the second terminal 2.

[0049] like Figures 1-8 As shown in the illustrated embodiment, the housing 5 is further provided with a first groove 551 and a second groove 552, which are respectively used to receive the first wire 3 and the second wire 4. The first groove 551 and the second groove 552 extend longitudinally and are recessed downward from the upper surface of the housing 5. When the terminal assembly is inserted into the housing 5, the first clamping portion 11 of the first terminal 1 is aligned longitudinally with the first groove 551, and the second clamping portion 21 of the second terminal 2 is aligned longitudinally with the second groove 552.

[0050] Those skilled in the art will understand that the embodiments described above are exemplary and can be improved upon. The structures described in the various embodiments can be freely combined without causing structural or principle conflicts, and these changes should fall within the protection scope of this utility model.

[0051] Although the present invention has been described in conjunction with the accompanying drawings, the embodiments disclosed in the drawings are intended to illustrate preferred embodiments of the present invention and should not be construed as a limitation thereof.

[0052] While some embodiments of the general concept of this utility model have been shown and described, those skilled in the art will understand that changes may be made to these embodiments without departing from the principles and spirit of the general concept of this utility model, the scope of which is defined by the claims and their equivalents.

[0053] It should be noted that the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. Additionally, any reference signs in the claims should not be construed as limiting the scope of the present application.

Claims

1. A terminal assembly, characterized in that, include: The first terminal (1) includes: The first clamping part (11) is used to clamp and electrically connect the first wire (3); and Elastic clip (12); and The second terminal (2) includes: The second clamping part (21) is used to clamp and electrically connect the second wire (4); and Tongue part (22); The tongue (22) is inserted into the elastic clip (12), and the elastic clip (12) holds the inserted tongue (22) to achieve an electrical connection between the first terminal (1) and the second terminal (2).

2. The terminal assembly according to claim 1, characterized in that: The first clamping part (11) is recessed upward from the bottom of the first terminal (1) and extends longitudinally through the first terminal (1). The second clamping part (21) is recessed upward from the bottom of the second terminal (2) and extends through the second terminal (2) along the longitudinal direction.

3. The terminal assembly according to claim 1, characterized in that: The first terminal (1) includes a front elastic arm (13) and a rear elastic arm (14) arranged opposite each other in the longitudinal direction, and the elastic clip (12) is formed between the front elastic arm (13) and the rear elastic arm (14).

4. The terminal assembly according to claim 3, characterized in that: The first terminal (1) includes a first left U-shaped arm (151) and a first right U-shaped arm (152). The first left U-shaped arm (151) and the first right U-shaped arm (152) are spaced apart in the lateral direction, thereby forming the first clamping part (11) between the first left U-shaped arm (151) and the first right U-shaped arm (152). The first left U-shaped arm (151) has a first left piercing wall (153), and the first right U-shaped arm (152) has a first right piercing wall (154). The distance between the first left piercing wall (153) and the first right piercing wall (154) in the lateral direction is less than the diameter of the first conductor (3), so that the first left piercing wall (153) and the first right piercing wall (154) can pierce the insulation layer of the first conductor (3) together.

5. The terminal assembly according to claim 4, characterized in that: The first terminal (1) further includes a first front connecting plate (161) and a first rear connecting plate (162). The first front connecting plate (161) is located above the front elastic arm (13), the first left U-shaped arm (151) and the first right U-shaped arm (152), and connects the front part of the front elastic arm (13), the front part of the first left U-shaped arm (151) and the front part of the first right U-shaped arm (152); The first rear connecting plate (162) is located above the rear elastic arm (14), the first left U-shaped arm (151) and the first right U-shaped arm (152), and connects the rear part of the rear elastic arm (14), the rear part of the first left U-shaped arm (151) and the rear part of the first right U-shaped arm (152).

6. The terminal assembly according to claim 4, characterized in that: The elastic clip (12) is located to the right of the first left U-shaped arm (151) and the first right U-shaped arm (152).

7. The terminal assembly according to claim 5, characterized in that: The first terminal (1) also includes a first spacer (17); The first spacer (17) extends longitudinally rearward from the first front connecting plate (161) to avoid the first front connecting plate (161) and the first rear connecting plate (162) being too close together.

8. The terminal assembly according to claim 4, characterized in that: The bottom of the first left U-shaped arm (151) and the first right U-shaped arm (152) forms a first receiving hole (18).

9. The terminal assembly according to claim 1, characterized in that: The second terminal (2) includes a second left U-shaped arm (251) and a second right U-shaped arm (252); The second left U-shaped arm (251) and the second right U-shaped arm (252) are spaced apart in the lateral direction, thereby forming the second clamping part (21) between the second left U-shaped arm (251) and the second right U-shaped arm (252). The second left U-shaped arm (251) has a second left piercing wall (253), and the second right U-shaped arm (252) has a second right piercing wall (254). The distance between the second left piercing wall (253) and the second right piercing wall (254) in the lateral direction is less than the diameter of the second conductor (4), so that the second left piercing wall (253) and the second right piercing wall (254) can pierce the insulation layer of the second conductor (4) together.

10. The terminal assembly according to claim 9, characterized in that: The second terminal (2) also includes a second front connecting plate (261) and a second rear connecting plate (262); The second front connecting plate (261) is located above the tongue (22), the second left U-shaped arm (251) and the second right U-shaped arm (252), and connects the front of the tongue (22), the front of the second left U-shaped arm (251) and the front of the second right U-shaped arm (252); The second rear connecting plate (262) is located above the second left U-shaped arm (251) and the second right U-shaped arm (252), and connects the rear part of the second left U-shaped arm (251) and the rear part of the second right U-shaped arm (252).

11. The terminal assembly according to claim 10, characterized in that: The tongue (22) is located to the left of the second left U-shaped arm (251) and the second right U-shaped arm (252).

12. The terminal assembly according to claim 10, characterized in that: The second terminal (2) also includes a second spacer (27); The second spacer (27) extends longitudinally rearward from the second front connecting plate (261) to avoid the second front connecting plate (261) and the second rear connecting plate (262) being too close together.

13. The terminal assembly according to claim 9, characterized in that: The bottom of the second left U-shaped arm (251) and the second right U-shaped arm (252) form a second receiving hole (28).

14. An electrical connector, characterized in that, include: Terminal assembly as described in any one of claims 1-13; and The housing (5) has a cavity (51) having an upper opening (52); The terminal assembly can be inserted into the cavity (51) through the upper opening (52) and held in the cavity (51).

15. The electrical connector according to claim 14, characterized in that: The terminal assembly is provided with a through hole (19) extending along the longitudinal direction, and the side wall of the housing (5) is provided with a protrusion (53) extending along the longitudinal direction. When the terminal assembly is inserted into the housing (5), the front elastic arm (13) and the rear elastic arm (14) of the first terminal (1) deform to move toward each other along the longitudinal direction, thereby allowing the protrusion (53) to be accommodated in the through hole (19) to limit the terminal assembly.

16. The electrical connector according to claim 15, characterized in that: The through hole (19) is located above the elastic clip (12).

17. The electrical connector according to claim 15, characterized in that: The housing (5) is also provided with a pair of protrusions (53), which are disposed on a pair of sidewalls along the longitudinal direction of the cavity (51).

18. The electrical connector according to claim 14, characterized in that: The housing (5) is also provided with a first positioning rod (541) and a second positioning rod (542), which extend upward from the bottom wall of the cavity (51) and are respectively used to pass through the first receiving hole (18) of the first terminal (1) and the second receiving hole (28) of the second terminal (2).

19. The electrical connector according to claim 14, characterized in that: The housing (5) is also provided with a first groove (551) and a second groove (552), which are respectively used to receive the first wire (3) and the second wire (4); The first groove (551) and the second groove (552) extend along the longitudinal direction and are recessed downward from the upper surface of the housing (5); When the terminal assembly is inserted into the housing (5), the first clamping portion (11) of the first terminal (1) is aligned with the first groove (551) in the longitudinal direction, and the second clamping portion (21) of the second terminal (2) is aligned with the second groove (552) in the longitudinal direction.

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