阅读说明：本技术 一种Type-C电连接器 (Type-C electric connector ) 是由 李峰 于 2019-10-09 设计创作，主要内容包括：本发明涉及电连接技术领域,提供了一种Type-C电连接器,其包括绝缘本体、EMI弹片、电性端子、夹持构件及金属壳体,绝缘本体具有后座及插接部,插接部具有插腔且两侧向后座延伸形成左、右侧槽,在插接部的左、右侧槽分别连通插腔,在后座的左、右侧槽垂直连通横槽；EMI弹片分上、下弹片件,上、下弹片件包围在靠近插腔口的插接部外围；电性端子包括上、下排端子,上排端子与下排端子对称固定于绝缘本体中；夹持构件包括垂直连接于横担部两端的左、右夹件,横担部组装于横槽,以使左、右夹件分别落于左、右槽；金属壳体套在绝缘本体外围,使EMI弹片夹持在插接部与金属壳体之间,通过前述构造解决了有提升屏蔽效果、提高产品良率及降低制造成本的效果。(The invention relates to the technical field of electric connection, and provides a Type-C electric connector which comprises an insulating body, an EMI (electro-magnetic interference) elastic sheet, an electric terminal, a clamping member and a metal shell, wherein the insulating body is provided with a rear seat and an inserting part, the inserting part is provided with an inserting cavity, two sides of the inserting cavity extend towards the rear seat to form a left side groove and a right side groove, the left side groove and the right side groove of the inserting part are respectively communicated with the inserting cavity, and the left side groove and the right side groove of the rear seat are vertically communicated with a transverse; the EMI elastic sheet is divided into an upper elastic sheet piece and a lower elastic sheet piece, and the upper elastic sheet piece and the lower elastic sheet piece surround the periphery of the plug-in part close to the plug-in cavity opening; the electric terminals comprise upper and lower rows of terminals, and the upper row of terminals and the lower row of terminals are symmetrically fixed in the insulating body; the clamping component comprises a left clamping piece and a right clamping piece which are vertically connected with two ends of the cross arm part, and the cross arm part is assembled in the cross groove so that the left clamping piece and the right clamping piece can respectively fall in the left groove and the right groove; the metal shell is sleeved on the periphery of the insulating body, so that the EMI elastic sheet is clamped between the insertion part and the metal shell, and the effects of improving the shielding effect, improving the product yield and reducing the manufacturing cost are achieved through the structure.)

1. a Type-C electrical connector, comprising:

The insulating body is provided with a rear seat and an inserting part, the inserting part is provided with an inserting cavity, two sides of the inserting part respectively extend towards the rear seat to form a left side groove and a right side groove, the left side groove and the right side groove of the inserting part are respectively communicated with the inserting cavity, and the left side groove and the right side groove of the rear seat are vertically communicated with the transverse groove;

The EMI elastic sheet is divided into an upper elastic sheet piece and a lower elastic sheet piece, the upper elastic sheet piece and the lower elastic sheet piece are arranged on the periphery of the inserting part close to the inserting cavity opening in a surrounding manner, the upper elastic sheet piece extends forwards to form an upper inner elastic sheet and a lower outer elastic sheet, the lower elastic sheet piece extends forwards relative to the upper elastic sheet piece to form a lower inner elastic sheet and a lower outer elastic sheet, the upper inner elastic sheet and the lower inner elastic sheet are respectively provided with contact parts protruding out of the inserting cavity, and the upper outer elastic sheet and the lower outer elastic sheet are opposite to the direction of the upper inner elastic sheet;

The electrical terminals comprise upper and lower rows of terminals, and the upper row of terminals and the lower row of terminals are symmetrically fixed in the insulating body;

the clamping component comprises a cross arm part, a left clamping piece and a right clamping piece which are vertically connected to two ends of the cross arm part, the left clamping piece and the right clamping piece are respectively provided with a clamping part and a tail end, and the cross arm part is assembled in the cross groove so that the left clamping piece and the right clamping piece can respectively fall in the left groove and the right groove;

the metal shell is sleeved on the periphery of the insulating body, so that the EMI elastic sheet is clamped between the insertion part and the metal shell, the elastic contact is abutted against the metal shell, and the metal shell is clamped with the clamping parts of the left clamping piece and the right clamping piece through a left hole and a right hole which are formed in the metal shell, so that the EMI elastic sheet is conducted with the clamping component through the metal shell.

2. The Type-C electrical connector of claim 1, wherein: the upper elastic sheet comprises an upper basic part and upper ear parts which are vertical to two sides of the upper basic part, the upper inner elastic sheet and the upper outer elastic sheet are formed by extending from the front side edge of the upper basic part, and the upper outer elastic sheet is positioned between two adjacent upper inner elastic sheets; the lower elastic sheet is arranged corresponding to the upper elastic sheet and comprises a lower basic part and two lower ear parts perpendicular to the lower basic part, the lower inner elastic sheet and the lower outer elastic sheet extend from the front side edge of the lower basic part to form, and the lower outer elastic sheet is positioned between two adjacent lower inner elastic sheets.

3. A Type-C electrical connector according to claim 2, wherein: the upper ear has an upper ear opening and the lower ear has a lower ear opening.

4. A Type-C electrical connector according to claim 3, wherein: the upper and lower outer spring plates are respectively provided with an outer frame part, and the elastic contact opposite to the direction of the inner spring plate is from the outer frame part.

5. The Type-C electrical connector of claim 4, wherein: the insertion part is provided with a ring-shaped groove, the ring-shaped groove is formed on the periphery of the insertion part close to the insertion cavity opening, the upper surface and the lower surface which are opposite in the ring-shaped groove are provided with elastic sheet holes which are penetrated through the insertion cavity, and the front clamping point and the rear clamping point are respectively arranged in the ring-shaped groove in a front-back convex mode corresponding to the left side and the right side.

6. A Type-C electrical connector according to claim 5, wherein: the upper elastic sheet is interfered with the front clamping point through the upper lug hole, so that the upper elastic sheet is fixed in the ring-shaped groove on the upper side, and the contact part of the upper elastic sheet is protruded out of the insertion cavity through the upper elastic sheet hole; the lower elastic sheet is interfered with the rear clamping point through the lower lug hole, so that the lower elastic sheet is fixed in the ring-shaped groove relatively below, and the contact part of the lower elastic sheet is protruded out of the insertion cavity through the lower elastic sheet hole.

7. The Type-C electrical connector of claim 6, wherein: the transverse groove divides the rear seat into an upper rear seat and a lower rear seat.

8. The Type-C electrical connector of claim 7, wherein: the upper and lower terminals respectively include a fixing portion, and an elastic portion and a welding portion respectively connected to two ends of the fixing portion.

9. The Type-C electrical connector of claim 8, wherein: the lower-row terminal fixing part is a lower fixing part which is embedded in the lower half part of the inserting part close to the rear seat; the lower elastic part of the lower row of the terminal is a lower elastic part which is positioned in the inserting cavity and close to the lower wall of the inserting cavity, the contact part of the lower elastic part is upward, the welding part of the lower row of the terminal is a lower welding part, the lower welding part is suspended behind the lower rear seat, and the welding surface of the lower welding part is upward; the upper row terminal fixing part is an upper fixing part, and the upper fixing part is buried in the upper half part of the inserting part close to the rear seat relative to the lower fixing part; the upper row of terminal elastic parts are upper elastic parts which are positioned in the plug cavity relative to the lower elastic parts and close to the upper wall of the plug cavity, the contact parts of the upper elastic parts face downwards, the upper row of terminal welding parts are upper welding parts, the upper welding parts are suspended behind the upper rear seat relative to the lower welding parts, and the welding surfaces of the upper welding parts face downwards.

10. A Type-C electrical connector according to claim 9, wherein: the PCB further comprises a PCB, wherein the front surface and the back surface of the PCB are provided with a first pad group and a second pad group which are symmetrical, and the PCB comprises: the first welding pad group comprises a left welding pad arranged close to the left side and a right welding pad arranged close to the right side, the second welding pad group comprises a plurality of welding pads which are in accordance with the number of terminals of the Type-C electric connector, and the plurality of welding pads are arranged between the left welding pad and the right welding pad; the tail end of the left clamping piece is connected with the left clamping piece through a downward bent part and is provided with an upward upper bonding surface which is horizontal to the welding surface of the lower welding part, and the tail end of the right clamping piece is connected with the right clamping piece through an upward bent part and is provided with a downward lower bonding surface which is horizontal to the welding surface of the upper welding part; the left clamp bonding surface is welded on the left bonding pad, the right clamp bonding surface is welded on the right bonding pad, the upper welding part welding surfaces of the upper row of terminals are respectively welded with a plurality of bonding pads on the front side of the PCB, and the lower welding part welding surfaces of the lower row of terminals are respectively welded with a plurality of bonding pads on the back side of the PCB.

Technical Field

The invention relates to the technical field of electric connection, in particular to a Type-C electric connector.

Background

The existing USB Type-C electric connector is wide in application range, such as mobile phone charging, electronic product charging, data transmission and the like. Because the USB Type-C electric connector has the characteristics of blind plugging, good anti-interference performance and large number of terminals, the terminal strip is basically molded integrally by injection molding through an embedded mold during manufacture, and although the technical problem of fixing the terminal strip and reducing the volume of a rubber core can be solved through the injection molding, the USB Type-C electric connector is formed by superposing two rows of terminal strip rubber cores in a symmetrical mode and fixing the terminal strip rubber cores in an insulating shell depending on the sleeving of the insulating shell, therefore, the embedding mold can be completed through injection molding by a precise mold and an expensive injection molding machine in the aspect of manufacture, and not only the efficiency is low, but also the cost is high; in addition, the number of product components is large, and the process is complex, which is not favorable for improving the product yield.

Disclosure of Invention

in order to solve the above technical problems, the present invention provides a Type-C electrical connector.

In order to achieve the purpose, the technical scheme of the invention is as follows: there is provided a Type-C electrical connector comprising:

The insulating body is provided with a rear seat and an inserting part, the inserting part is provided with an inserting cavity, two sides of the inserting part respectively extend towards the rear seat to form a left side groove and a right side groove, the left side groove and the right side groove of the inserting part are respectively communicated with the inserting cavity, and the left side groove and the right side groove of the rear seat are vertically communicated with the transverse groove;

The EMI elastic sheet is divided into an upper elastic sheet piece and a lower elastic sheet piece, the upper elastic sheet piece and the lower elastic sheet piece are arranged on the periphery of the inserting part close to the inserting cavity opening in a surrounding manner, the upper elastic sheet piece extends forwards to form an upper inner elastic sheet and a lower outer elastic sheet, the lower elastic sheet piece extends forwards relative to the upper elastic sheet piece to form a lower inner elastic sheet and a lower outer elastic sheet, the upper inner elastic sheet and the lower inner elastic sheet are respectively provided with contact parts protruding out of the inserting cavity, and the upper outer elastic sheet and the lower outer elastic sheet are opposite to the direction of the upper inner elastic sheet;

The electrical terminals comprise upper and lower rows of terminals, and the upper row of terminals and the lower row of terminals are symmetrically fixed in the insulating body;

The clamping component comprises a cross arm part, a left clamping piece and a right clamping piece which are vertically connected to two ends of the cross arm part, the left clamping piece and the right clamping piece are respectively provided with a clamping part and a tail end, and the cross arm part is assembled in the cross groove so that the left clamping piece and the right clamping piece can respectively fall in the left groove and the right groove;

The metal shell is sleeved on the periphery of the insulating body, so that the EMI elastic sheet is clamped between the insertion part and the metal shell, the elastic contact is abutted against the metal shell, and the metal shell is clamped with the clamping parts of the left clamping piece and the right clamping piece through a left hole and a right hole which are formed in the metal shell, so that the EMI elastic sheet is conducted with the clamping component through the metal shell.

In the present embodiment, it is preferable that: the upper elastic sheet comprises an upper basic part and upper ear parts which are vertical to two sides of the upper basic part, the upper inner elastic sheet and the upper outer elastic sheet are formed by extending from the front side edge of the upper basic part, and the upper outer elastic sheet is positioned between two adjacent upper inner elastic sheets; the lower elastic sheet is arranged corresponding to the upper elastic sheet and comprises a lower basic part and two lower ear parts perpendicular to the lower basic part, the lower inner elastic sheet and the lower outer elastic sheet extend from the front side edge of the lower basic part to form, and the lower outer elastic sheet is positioned between two adjacent lower inner elastic sheets.

In the present embodiment, it is preferable that: the upper ear has an upper ear opening and the lower ear has a lower ear opening.

In the present embodiment, it is preferable that: the upper and lower outer spring plates are respectively provided with an outer frame part, and the elastic contact opposite to the direction of the inner spring plate is from the outer frame part.

In the present embodiment, it is preferable that: the insertion part is provided with a ring-shaped groove, the ring-shaped groove is formed on the periphery of the insertion part close to the insertion cavity opening, the upper surface and the lower surface which are opposite in the ring-shaped groove are provided with elastic sheet holes which are penetrated through the insertion cavity, and the front clamping point and the rear clamping point are respectively arranged in the ring-shaped groove in a front-back convex mode corresponding to the left side and the right side.

In the present embodiment, it is preferable that: the upper elastic sheet is interfered with the front clamping point through the upper lug hole, so that the upper elastic sheet is fixed in the ring-shaped groove on the upper side, and the contact part of the upper elastic sheet is protruded out of the insertion cavity through the upper elastic sheet hole; the lower elastic sheet is interfered with the rear clamping point through the lower lug hole, so that the lower elastic sheet is fixed in the ring-shaped groove relatively below, and the contact part of the lower elastic sheet is protruded out of the insertion cavity through the lower elastic sheet hole.

In the present embodiment, it is preferable that: the transverse groove divides the rear seat into an upper rear seat and a lower rear seat.

In the present embodiment, it is preferable that: the upper and lower terminals respectively include a fixing portion, and an elastic portion and a welding portion respectively connected to two ends of the fixing portion.

in the present embodiment, it is preferable that: the lower-row terminal fixing part is a lower fixing part which is embedded in the lower half part of the inserting part close to the rear seat; the lower elastic part of the lower row of the terminal is a lower elastic part which is positioned in the inserting cavity and close to the lower wall of the inserting cavity, the contact part of the lower elastic part is upward, the welding part of the lower row of the terminal is a lower welding part, the lower welding part is suspended behind the lower rear seat, and the welding surface of the lower welding part is upward; the upper row terminal fixing part is an upper fixing part, and the upper fixing part is buried in the upper half part of the inserting part close to the rear seat relative to the lower fixing part; the upper row of terminal elastic parts are upper elastic parts which are positioned in the plug cavity relative to the lower elastic parts and close to the upper wall of the plug cavity, the contact parts of the upper elastic parts face downwards, the upper row of terminal welding parts are upper welding parts, the upper welding parts are suspended behind the upper rear seat relative to the lower welding parts, and the welding surfaces of the upper welding parts face downwards.

In the present embodiment, it is preferable that: the PCB further comprises a PCB, wherein the front surface and the back surface of the PCB are provided with a first pad group and a second pad group which are symmetrical, and the PCB comprises: the first welding pad group comprises a left welding pad arranged close to the left side and a right welding pad arranged close to the right side, the second welding pad group comprises a plurality of welding pads which are in accordance with the number of terminals of the Type-C electric connector, and the plurality of welding pads are arranged between the left welding pad and the right welding pad; the tail end of the left clamping piece is connected with the left clamping piece through a downward bent part and is provided with an upward upper bonding surface which is horizontal to the welding surface of the lower welding part, and the tail end of the right clamping piece is connected with the right clamping piece through an upward bent part and is provided with a downward lower bonding surface which is horizontal to the welding surface of the upper welding part; the left clamp bonding surface is welded on the left bonding pad, the right clamp bonding surface is welded on the right bonding pad, the upper welding part welding surfaces of the upper row of terminals are respectively welded with a plurality of bonding pads on the front side of the PCB, and the lower welding part welding surfaces of the lower row of terminals are respectively welded with a plurality of bonding pads on the back side of the PCB.

compared with the prior art, the invention has the beneficial effects that: firstly, the shielding effect is improved through grading contact, so that the product performance is improved; and secondly, the number of components is small, the process is simple, and the product yield is favorably improved.

drawings

Fig. 1 is a perspective view of the present embodiment.

Fig. 2 is a perspective view of the present embodiment from another perspective.

fig. 3 is a front view of the present embodiment.

3 fig. 3 4 3 is 3 a 3 cross 3- 3 sectional 3 view 3 from 3 a 3- 3 a 3 in 3 fig. 3 3 3. 3

Fig. 5 is an exploded view of the PCB of the present embodiment.

Detailed Description

while this invention is susceptible of embodiment in different forms, there is shown in the drawings and will herein be described in detail, specific embodiments thereof with the understanding that the present description is to be considered as an exemplification of the principles of the invention and is not intended to limit the invention to that as illustrated.

thus, a feature indicated in this specification is intended to describe one of the features of an embodiment of the invention and does not imply that every embodiment of the invention must have the described feature. Further, it should be noted that this specification describes many features. Although some features may be combined to show a possible system design, these features may also be used in other combinations not explicitly described. Thus, the combinations illustrated are not intended to be limiting unless otherwise specified.

In the embodiments shown in the drawings, the directions such as up, down, left, right, front, and rear are used to explain the structure and movement of various components of the present invention not absolutely but relatively. These illustrations are appropriate when these components are in the positions shown in the figures. If the description of the positions of these components changes, the indication of these directions changes accordingly.

The preferred embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

referring to fig. 1, fig. 2 and fig. 3 in combination with fig. 4 and fig. 5, there is provided a Type-C electrical connector, which includes an insulative housing 10, electrical terminals 20, a clamping member 30 and a metal shell 40, wherein:

The insulation body 10 is provided with a rear seat 11 and an insertion part 12 extending in front of the rear seat 11, the insertion part 12 is provided with an insertion cavity 15, two sides of the insertion part 12 respectively extend to two sides of the rear seat 11 to form a left side groove 13 and a right side groove 13, and the front sections of the left side groove 13 and the right side groove 13 are respectively communicated with the insertion cavity 15; the rear seat 11 is recessed forward with a transverse groove 14, the transverse groove 14 divides the rear seat 11 into an upper rear seat and a lower rear seat (not labeled), and two ends of the transverse groove 14 are respectively communicated with the left side groove 13 and the right side groove 13;

the electrical terminals 20 include upper and lower terminals symmetrically disposed on the insulating housing 10, and the upper and lower terminals respectively include a fixing portion 21, and an elastic portion 22 and a soldering portion 23 connected to two ends of the fixing portion 21, wherein: a lower row terminal fixing portion (hereinafter referred to as "lower fixing portion") 21 is embedded in the lower half of the inserting portion 12 close to the rear seat 11, so that a lower row terminal elastic portion (hereinafter referred to as "lower elastic portion") 22 is located in the inserting cavity 15 close to the lower wall (not labeled) of the inserting cavity 15 and the contact portion (not labeled) faces upward, and a lower row terminal welding portion (hereinafter referred to as "lower welding portion") 23 is suspended behind the rear seat 11 through the lower rear seat and the welding surface (not labeled) faces upward; an upper row of terminal fixing portions (hereinafter referred to as "upper fixing portions") is embedded in the upper half of the inserting portion 12 near the rear seat 11 with respect to the lower fixing portion 21, so that an upper row of terminal elastic portions (hereinafter referred to as "upper elastic portions") is located near an upper wall (not labeled) of the inserting cavity and a contact portion (not labeled) faces downward in the inserting cavity 15 with respect to the lower elastic portion 22, and an upper row of terminal soldering portions (hereinafter referred to as "upper soldering portions") is suspended behind the rear seat 11 through the upper rear seat with respect to the lower soldering portion 23 and a soldering surface (not labeled) faces downward;

Clamping member 30 includes cross arm portion 31 and left and right clamp pieces 32 connected to both ends of cross arm portion 31, wherein: the cross arm part 31 is arranged in the cross groove 14, so that the left clamping piece 32 and the right clamping piece 32 are respectively dropped in the left groove 13 and the right groove 13, thereby the left clamping part 322 of the left clamping piece 32 is protruded to the inserting cavity 15, and the right clamping part 322 of the right clamping piece 32 is also protruded to the inserting cavity 15 in symmetry with the left clamping part 322; in this embodiment, the left and right clip members 32 have a clipping portion 321 and ends 323 and 323', respectively, wherein: left clamp clamping portion 321 is disposed on the other side of left clamp 32 (i.e., on the outer side of left clamp 32) corresponding to cross arm portion 31, and right clamp clamping portion (not labeled) is disposed on the other side of right clamp 32 (i.e., on the outer side of right clamp 32) corresponding to cross arm portion 31; a tip (i.e., a left clip tip) 323 is connected to the left clip 32 via a down-turned portion E and has an upper adhesive surface (not labeled) facing upward and horizontal to the welding surface of the lower welding portion 23, and a tip (i.e., a right clip tip) 323' is connected to the right clip 32 via a up-turned portion E and has a lower adhesive surface (not labeled) facing downward and horizontal to the welding surface of the upper welding portion;

the metal shell 40 is a structure that fits around the periphery of the insulating body 10 and has a left hole 41 matching with the left clip locking portion 321 and a right hole (not labeled) matching with the right clip locking portion (not labeled), in this example, since the cross arm portion 31 of the clamping member 30 abuts against the cross groove 14, the clamping member 30 cannot continuously move forward on the insulating body 10, and since the inserting portion 12 retracts up and down into the rear seat 11, the metal shell 40 fitted around the insulating body 10 cannot continuously move backward through the front of the rear seat 11, when the metal shell 40 respectively locks the left and right clip locking portions through the left and right holes, the metal shell 40 cannot move forward on the insulating body 10, and likewise, the clamping member 30 cannot move backward on the insulating body 10.

referring to fig. 2, 4 and 5, the Type-C electrical connector further includes an EMI resilient piece 50 disposed on the mating part 12, wherein the EMI resilient piece 50 is composed of an upper resilient piece 51 and a lower resilient piece 52 and respectively includes a base portion 511 and a base portion 521, two side ear portions 512 and 522 perpendicular to the base portion, and inner resilient pieces 513 and 523 and outer resilient pieces 514 and 524 respectively extending forward. Wherein: each of the left and right side ears 512, 522 has an ear hole 5121, 5221, and each of the outer spring pieces 514, 524 is an elastic contact 5141, 5241, which is opposite to the inner spring piece and extends outwards, and is disposed on the outer frame portion (not labeled) extending forwards. In this example, a ring-shaped groove 121 surrounded by (or accommodating) upper and lower elastic sheet members 51, 52 is formed on the periphery of the insertion part 12 near the opening of the insertion cavity 15, elastic sheet holes 1211 penetrating through the insertion cavity 15 are respectively formed in the ring-shaped groove 121 corresponding to the upper and lower surfaces, and contact parts (not labeled) of the inner elastic sheets 513, 523 respectively protrude into the insertion cavity 15 through the elastic sheet holes 1211; a front clamping point 1212 and a rear clamping point 1213 are respectively convexly arranged in the ring-shaped groove 121 in a front-rear manner corresponding to the left side and the right side, wherein: the left and right front fastening points 1212 are fastened to the ear holes 5121 of the left and right ears 512 of the upper spring, respectively, and the left and right rear fastening points 1213 are fastened to the ear holes 5221 of the left and right ears 522 of the lower spring, respectively, so that the upper and lower spring members 51, 52 are fastened to the front end of the inserting portion 12 in a manner of surrounding the inserting portion 12, and then the metal case 40 is sleeved on the insulating body 10, so that the EMI spring 50 is clamped between the inserting portion 12 and the metal case 40, at this time, the elastic contacts 5141, 5241 of the EMI spring 50 abut against the metal case 40, and the metal case 40 is fastened to the left and right clamping portions through the left and right holes, so that the EMI spring 50 is connected to the clamping member 30 through the metal case 40. In this embodiment, a segmented "three-stage" contact manner is adopted between the external docking device (not shown) to improve the grounding (and/or shielding) effect, for example: the inner spring 513, 523 of the upper and lower spring is the first-level contact, the left and right clamping pieces 32 are the second-level contact and the contact part of each terminal is the third-level contact.

Referring to fig. 1 in combination with fig. 2 and 4, a Type-C electrical connector provided in the figure further includes a PCB 60, and the front and back surfaces of the PCB 60 have first and second pad sets (not labeled) that are symmetrical, wherein: the first welding pad group comprises a left welding pad and a right welding pad, the left welding pad is arranged close to the left side, the right welding pad is arranged close to the right side, the second welding pad group comprises a plurality of welding pads, the number of the welding pads is in accordance with the number of the terminals of the Type-C electric connector, the plurality of welding pads are arranged between the left welding pad and the right welding pad, the bonding surface of the left clamping piece is welded on the left welding pad, the bonding surface of the right clamping piece is welded on the right welding pad, and the bonding surfaces of the terminals are respectively welded on the plurality of.