Busbar connecting line reverse welding structure

Abstract

The invention discloses a busbar connecting line reverse welding structure, which comprises a circuit board, a wire row and a first circuit, and is characterized in that the circuit board is provided with a wiring side, a plugging side, a welding area and a first butt joint area and defines a wire outlet direction from the wiring side to the plugging side, the welding area is positioned on the wiring side, and the first butt joint area is positioned on the plugging side; the wire row comprises a body section, an attaching section and a welding end, the body section extends in the wire outlet direction, the attaching section is roughly attached to the circuit board, the welding end is electrically connected to the welding area, the first circuit is arranged on the circuit board and comprises a first embedded section and a first extending section, the first embedded section is embedded in the circuit board and connected with the welding area, and the first extending section extends in the wire outlet direction. The first extension section is connected with the first butt joint area and the first embedding section; therefore, the problem that signal attenuation is not matched with impedance can be avoided.

Description

Technical Field

[0001] The invention relates to a busbar connecting line, in particular to a busbar connecting line reverse welding structure which adopts reverse welding to reverse the line and can avoid signal attenuation and impedance mismatching problems. Background Art

[0002] The bus cable of PCIe (Peripheral Component Interconnect Express) is widely used in the connector industry. It mainly includes the bus bar and the circuit boards and connectors at both ends. Due to the high flexibility of the bus bar itself, which can be bent and twisted, the bus cable can be installed in a forward or reverse manner according to the installation environment of different users, and thus the demand for reverse output of the bus bar is derived.

[0003] Specifically, when the line is normally output, the line row extends in the opposite direction of the circuit board connection (that is, the setting position of the connector), and the welding end of the line row is facing the circuit board connection, which is called positive welding; reverse output means that the line row extends in the same direction as the circuit board connection. Therefore, most of the existing technologies use a reverse welding method for design, that is, the welding end of the line row is facing the opposite direction of the circuit board connection, and the line row can be extended in the same direction as the circuit board connection.

[0004] However, the reverse soldering method of the busbar on the circuit board will cause the signal to take an extra path when transmitting, resulting in a stub effect, which will lead to problems such as signal attenuation and impedance mismatch. This situation will be more serious when the current industry changes PCIe 3.0 to the higher-speed PCIe Gen5. Therefore, how to design a busbar connection line that can achieve the reverse output requirement by reverse soldering while avoiding negative effects is an urgent problem to be solved. Summary of the invention

[0005] The main purpose of the present invention is to improve the problem of signal attenuation and impedance mismatch caused by a stub effect when the bus connection line needs to be reversed and the signal needs to take an extra path due to reverse soldering of the bus bar, thereby generating a stub effect.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a busbar connecting line reverse welding structure, including a circuit board, a line row and multiple first lines, the circuit board has a wiring side and a plug-in side opposite to each other, the circuit board has a welding area and a first docking area and defines a line output direction, the welding area is located on the wiring side, the first docking area is located on the plug-in side, the line output direction is from the wiring side to the plug-in side, the line row includes a main body section, an attachment section and multiple welding ends, the main body section extends along the line output direction, the attachment section extends from the main body section in the opposite direction of the line output direction and is attached to the circuit board, each welding end extends from the attachment section in the opposite direction of the line output direction and is electrically connected to the welding area, each first line is arranged on the circuit board, each first line includes a first buried section and a first extension section, each first buried section is buried in the circuit board and connected to a side of the welding area away from the plug-in side, and each first extension section connects the first docking area and the corresponding first buried sections.

[0007] In one embodiment of the present invention, a plurality of second circuits are also included, the circuit board has a second docking area, the second docking area is located on the plug-in side, the first docking area and the second docking area are respectively located on two opposite side surfaces of the circuit board, each second circuit includes a second buried section and a second extension section, each second buried section is buried in the circuit board and connected to a side of the welding area away from the plug-in side, and each second extension section connects the second docking area and the corresponding second buried sections.

[0008] In one embodiment of the present invention, the circuit board has a first surface and a second surface opposite to each other, the first docking area is disposed on the first surface, the welding area is disposed on the second surface, and each first extension section is arranged on the first surface.

[0009] In one embodiment of the present invention, a plurality of second circuits are further included, the circuit board has a second docking area, the second docking area is located on the plug-in side and is arranged on the second surface, each second circuit includes a second buried section and a second extension section, each second buried section is buried in the circuit board and connected to a side of the welding area away from the plug-in side, in each second extension section, the second extension section includes a first exposed portion, a buried portion and a second exposed portion, the buried portion is buried in the circuit board, two ends of the first exposed portion are respectively connected to the second buried section and the buried portion, and two ends of the second exposed portion are respectively connected to the buried portion and the second docking area.

[0010] In one embodiment of the present invention, the circuit board has a first surface and a second surface opposite to each other, the first docking area is disposed on the first surface, the welding area is disposed on the second surface, and each first extension section is buried in the circuit board.

[0011] In one embodiment of the present invention, in each first extension segment, the first extension segment includes a first extension portion and a first connection portion, the first extension portion is connected to the corresponding first embedded segment, and the first connection portion connects the first extension portion and the first docking area.

[0012] In one embodiment of the present invention, a plurality of second circuits are further included, the circuit board has a second docking area, the second docking area is located on the plug-in side and is arranged on the second surface, each second circuit includes a second buried section and a second extension section, each second buried section is buried in the circuit board and connected to a side of the welding area away from the plug-in side, and each second extension section is buried in the circuit board and connects the second docking area and the corresponding second buried sections.

[0013] In one embodiment of the present invention, in each second extension segment, the second extension segment includes a second extension portion and a second connection portion, the second extension portion is connected to the corresponding second embedded segment, and the second connection portion connects the second extension portion and the second docking area.

[0014] In one embodiment of the present invention, a connector is further included. The connector is arranged on the plug-in side. The main body section includes an inclined portion and a straight portion. The inclined portion is obliquely connected between the attachment section and the straight portion so that the straight portion bypasses the outer edge of the connector.

[0015] In one embodiment of the present invention, a fixing member is further included. The fixing member is disposed on the wiring side and covers each welding end and at least a portion of the attachment section.

[0016] The busbar connecting line reverse soldering structure of the present invention arranges a plurality of first lines on a circuit board so that each first buried section is buried in the circuit board and connected to a side of the welding area away from the plug-in side, and each first extension section is connected to the first docking area and the corresponding first buried section, thereby avoiding the signal from taking additional repeated paths, thereby preventing the signal attenuation and impedance mismatch problems caused by the stub effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional appearance diagram of the first embodiment of the present invention;

[0018] Figure 2 A three-dimensional appearance diagram of another viewing angle of the first embodiment of the present invention;

[0019] Figure 3 is a perspective exploded view of a first embodiment of the present invention;

[0020] Figure 4 It is a three-dimensional exploded view of another viewing angle of the first embodiment of the present invention;

[0021] Figure 5 is a cross-sectional side view of a first embodiment of the present invention;

[0022] Figure 6 It is a wiring diagram of the first circuit of the first embodiment of the present invention;

[0023] Figure 7 It is a wiring diagram of the second circuit of the first embodiment of the present invention;

[0024] Figure 8 This is a wiring diagram of the first circuit of the second embodiment of the present invention;

[0025] Fig. 9 It is a wiring diagram of the second circuit of the second embodiment of the present invention;

[0026] Among them, the reference numerals

[0027] 10: Circuit board;

[0028] 101: a first surface;

[0029] 102: second surface;

[0030] 11: Wiring side;

[0031] 12: plug-in side;

[0032] 13: welding area;

[0033] 14: first docking area;

[0034] 15: second docking area;

[0035] 20: Linear arrangement;

[0036] 21: Ontology section;

[0037] 211: inclined portion;

[0038] 212: straight part;

[0039] 22: attachment section;

[0040] 23: welding end;

[0041] 30: connector;

[0042] 31: first terminal;

[0043] 32: second terminal;

[0044] 40: first line;

[0045] 41: first buried section;

[0046] 42: first extension section;

[0047] 421: first extension portion;

[0048] 422: first connecting portion;

[0049] 50: second line;

[0050] 51: second buried section;

[0051] 52: second extension section;

[0052] 521: first exposed part;

[0053] 522: Burial Department;

[0054] 523: second exposed part;

[0055] 524: second extension portion;

[0056] 525: second connecting portion;

[0057] 60: fixing member;

[0058] D: Outgoing line direction. DETAILED DESCRIPTION

[0059] In the description of the present invention, it should be understood that the terms "front side", "rear side", "left side", "right side", "front end", "rear end", "end", "longitudinal", "lateral", "vertical", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0060] As used herein, terms such as "first," "second," "third," "fourth," and "fifth" describe various elements, components, regions, layers, and / or portions, which should not be limited by these terms. These terms may only be used to distinguish one element, component, region, layer, or portion from another. Unless the context clearly indicates, terms such as "first," "second," "third," "fourth," and "fifth" as used herein do not imply a sequence or order.

[0061] As used herein and not otherwise defined, the terms "substantially" and "approximately" are used to describe and describe small variations. When applied to an event or circumstance, the term may include the exact moment at which the event or circumstance occurred, as well as the event or circumstance occurring to a close approximation. For example, when applied to a numerical value, the term may include a range of variation less than or equal to ±10% of the numerical value, such as less than or equal to ±5%, less than or equal to ±4%, less than or equal to ±3%, less than or equal to ±2%, less than or equal to ±1%, less than or equal to ±0.5%, less than or equal to ±0.1%, or less than or equal to ±0.05%.

[0062] The detailed description and technical contents of the present invention will be described as follows with reference to the accompanying drawings, however, the drawings are only for illustrative purposes and are not intended to limit the present invention.

[0063] The present invention provides a busbar connecting wire reverse welding structure, please refer to Figures 1 to 7 FIG. 1 is a first embodiment of the present invention, which mainly includes a circuit board 10 , a wire array 20 , a connector 30 and a plurality of first circuits 40 .

[0064] See also Figures 1 to 5 As shown, the circuit board 10 has a wiring side 11 and a plug-in side 12 opposite to each other. In this embodiment, the wiring side 11 is located at the front side of the circuit board 10, and the plug-in side 12 is located at the rear side of the circuit board 10. The circuit board 10 has a welding area 13 and a first docking area 14, and defines a wire outlet direction D. The welding area 13 is located at the wiring side 11, and the first docking area 14 is located at the plug-in side 12. The wire outlet direction D is from the wiring side 11 to the plug-in side 12. The first docking area 14 is provided with a gold finger, and the direction of the gold finger is the same as the wire outlet direction D.

[0065] See also Figures 2 to 5 As shown, the cable array 20 includes a body section 21, an attachment section 22 and a plurality of welding ends 23. The body section 21 extends along the cable outlet direction D, that is, extends from one side of the circuit board 10 toward the plug-in side 12. The attachment section 22 extends from the body section 21 in the opposite direction of the cable outlet direction D, and is roughly attached to the circuit board 10. Each welding end 23 extends from the attachment section 22 in the opposite direction of the cable outlet direction D, and is electrically connected to the welding area 13. Therefore, the cable array 20 is located on one side of the circuit board 10, each welding end 23 faces the opposite direction to the plug-in side 12, and the cable array 20 extends along the cable outlet direction D and faces the same direction as the plug-in side 12, so as to achieve the effect of reverse cable outlet by reverse welding.

[0066] It should be noted that the “attachment section 22 is substantially attached to the circuit board 10 ” mentioned here refers to the setting type of the attachment section 22 , that is, there may still be a slight gap between the attachment section 22 and the circuit board 10 , and does not mean that the attachment section 22 is completely attached and fixed to the circuit board 10 .

[0067] See also Figures 1 to 5 As shown, the connector 30 is disposed on the plug-in side 12. The connector 30 has a plurality of first terminals 31 arranged in a row. Each first terminal 31 is elastically overlapped with a gold finger of the first docking area 14, so that the connector 30 and the circuit board 10 are electrically connected to transmit signals.

[0068] Each first circuit 40 is arranged on the circuit board 10. Each first circuit 40 includes a first buried section 41 and a first extension section 42. Each first buried section 41 is buried in the circuit board 10 and connected to a side of the welding area 13 away from the plug-in side 12. Each first extension section 42 connects the first docking area 14 and the corresponding first buried section 41.

[0069] Therefore, each welding end 23 faces the opposite direction to the plug-in side 12, and the line row 20 extends along the line-out direction D and faces the same direction as the plug-in side 12, so that the effect of reversing the line out can be achieved by reverse soldering; at the same time, each first buried section 41 is buried in the circuit board 10 and connected to the side of the welding area 13 away from the plug-in side 12, and each first extension section 42 is connected to the first docking area 14 and the corresponding first buried sections 41, so that the signal can directly enter each first buried section 41 after passing through each welding end 23, and then be transmitted to the first docking area 14 and the connector 30 through each first extension section 42, thereby avoiding the signal from taking additional repeated paths, thereby preventing the signal attenuation and impedance mismatch caused by the stub effect.

[0070] For further explanation, see Figures 1 to 4 As shown, the circuit board 10 has a first surface 101 and a second surface 102 opposite to each other. In this embodiment, the first surface 101 is the upper surface of the circuit board 10, and the second surface 102 is the lower surface of the circuit board 10, but the present invention is not limited thereto. Figure 6 As shown, the first docking area 14 in this embodiment is disposed on the first surface 101, the welding area 13 is disposed on the second surface 102, and each first extension section 42 of each first circuit 40 is arranged on the first surface 101, but the present invention is not limited thereto. Specifically, each first embedded section 41 in this embodiment is vertically connected between the corresponding first extension section 42 and the welding area 13, so that each first circuit 40 presents an inverted L shape, but the first embedded section 41 can also be obliquely connected between the first extension section 42 and the welding area 13.

[0071] In addition, in order to match the connector 30 with upper and lower rows of overlapping terminals, the busbar connection line anti-welding structure of this embodiment also includes a plurality of second lines 50, and the circuit board 10 has a second docking area 15. However, the provision of a plurality of second lines 50 and the second docking area 15 is not a necessary limitation of the present invention, which is explained here first. The second docking area 15 is located on the plug-in side 12 and is provided with a gold finger, and the orientation direction of the gold finger is the same as the outlet direction D. The first docking area 14 and the second docking area 15 are respectively located on the opposite sides of the circuit board 10. In this embodiment, the first docking area 14 is provided on the first surface 101, and the second docking area 15 is provided on the second surface 102, but it can also be provided in the opposite direction. The connector 30 is provided on the first surface 101 and the second surface 102 of the circuit board 10 at the same time, and has a plurality of second terminals 32 arranged in a row and arranged up and down with each first terminal 31. Each second terminal 32 is elastically overlapped with the gold finger of the second docking area 15, so that the connector 30 and the circuit board 10 form an electrical connection to transmit signals. Each second circuit 50 includes a second buried section 51 and a second extension section 52. Each second buried section 51 is buried in the circuit board 10 and connected to the side of the soldering area 13 away from the plug-in side 12. Each second extension section 52 connects the second docking area 15 and the corresponding second buried section 51.

[0072] Therefore, each second buried section 51 is buried in the circuit board 10 and connected to the side of the welding area 13 away from the plug-in side 12, and each second extension section 52 is connected to the second docking area 15 and the corresponding second buried section 51, so that the signal can directly enter each second buried section 51 after passing through each welding end 23, and then be transmitted to the second docking area 15 and the connector 30 through each second extension section 52, and it can also avoid the signal from taking additional repeated paths, thereby preventing the signal attenuation and impedance mismatch caused by the stub effect.

[0073] Please read next Figure 7 As shown, each second extension section 52 in this embodiment includes a first exposed portion 521, a buried portion 522 and a second exposed portion 523. In each second extension section 52, the buried portion 522 is buried in the circuit board 10, the two ends of the first exposed portion 521 are respectively connected to the second buried section 51 and the buried portion 522, and the two ends of the second exposed portion 523 are respectively connected to the buried portion 522 and the second docking area 15. In this embodiment, each second buried section 51 is vertically connected between the welding area 13 and the corresponding first exposed portion 521, and each buried portion 522 is vertically connected between the corresponding first exposed portion 521 and the corresponding second exposed portion 523, so that each second extension section 52 is lightning-shaped, but the present invention is not limited thereto.

[0074] In particular, when the connector 30 has only one row of terminals (for example, only the aforementioned multiple first terminals 31 or only the aforementioned multiple second terminals 32), the connector 30 can be vertically arranged on the first surface 101 or the second surface 102 of the circuit board 10, or can be arranged on the first surface 101 and the second surface 102 of the circuit board 10 at the same time, and the first docking area 14 can be correspondingly arranged on the first surface 101 or the second surface 102 to overlap with the row of terminals of the connector 30. Therefore, if the first docking area 14 is arranged on the first surface 101, each first circuit 40 can adopt the aforementioned Figure 6 When the first docking area 14 is disposed on the second surface 102, each first circuit 40 may adopt the aforementioned Figure 7 The second line 50 is arranged in such a way that wiring is performed.

[0075] See also Figures 2 to 5 As shown, the body section 21 in this embodiment includes an inclined portion 211 and a straight portion 212, but the present invention is not limited thereto. The inclined portion 211 is connected obliquely between the attachment section 22 and the straight portion 212, so that the straight portion 212 can bypass the outer edge of the connector 30 without causing interference. It should be noted that in other embodiments not shown in the figures, if the connector 30 is directly disposed on the first surface 101, the body section 21 does not need to form the inclined portion 211, that is, the straight portion 212 can be straightly attached to the second surface 102 and extend out along the line-out direction D.

[0076] See also Figure 1 and Figure 5 As shown, the busbar connection line anti-welding structure of this embodiment further includes a fixing member 60, but the present invention is not limited thereto. The fixing member 60 is disposed on the wiring side 11, and covers and fixes each welding end 23 and at least a portion of the attachment section 22, thereby protecting each welding end 23 from being separated. Specifically, the fixing member 60 in this embodiment is integrally formed by plastic injection molding on the side of the circuit board 10 away from the plug-in side 12, but the present invention is not limited thereto, for example, the fixing member 60 can also be split into two pieces to clamp the circuit board 10 to achieve the effect of covering each welding end 23 and a portion of the attachment section 22.

[0077] Please read next Figure 8 and Fig. 9 FIG. 2 is a second embodiment of the present invention. The main difference between the second embodiment and the first embodiment lies in the wiring method of each first circuit 40 and each second circuit 50 , which is described in detail as follows.

[0078] See also Figure 8As shown, each first buried section 41 of each first circuit 40 is buried in the circuit board 10 and connected to the side of the welding area 13 away from the plug-in side 12, and each first extension section 42 of each first circuit 40 is buried in the circuit board 10 and connected to the first docking area 14 and the corresponding first buried sections 41. Each first extension section 42 in this embodiment includes a first extension portion 421 and a first connection portion 422. In each first extension section 42, the first extension portion 421 connects the corresponding first buried section 41, and the first connection portion 422 connects the first extension portion 421 and the first docking area 14. In this embodiment, each first buried section 41 vertically connects the welding area 13 and the corresponding first extension portion 421, and each first connection portion 422 vertically connects the corresponding first extension portion 421 and the first docking area 14, so that each first extension section 42 is in an inverted L shape, but the present invention is not limited thereto.

[0079] See also Fig. 9 As shown, each second buried section 51 of each second circuit 50 is buried in the circuit board 10 and connected to the side of the welding area 13 away from the plug-in side 12, and each second extension section 52 of each second circuit 50 is buried in the circuit board 10 and connected to the second docking area 15 and the corresponding second buried sections 51. Each second extension section 52 in this embodiment includes a second extension portion 524 and a second connection portion 525. In each second extension section 52, the second extension portion 524 connects the corresponding second buried section 51, and the second connection portion 525 connects the second extension portion 524 and the second docking area 15. In this embodiment, each second buried section 51 vertically connects the welding area 13 and the corresponding second extension portion 524, and each second connection portion 525 vertically connects the corresponding second extension portion 524 and the second docking area 15, so that each second extension section 52 is in an inverted U shape, but the present invention is not limited thereto.

[0080] Therefore, each first circuit 40 and each second circuit 50 in the second embodiment are hidden in the circuit board 10 and are not exposed to the outside, which can effectively reduce the signal interference caused by the first circuit 40 and the second circuit 50 being exposed to the outside, and can avoid oxidation and contamination caused by contact with the external air and environment, effectively prolonging the service life, and can also achieve the reverse output effect while avoiding the signal attenuation and impedance mismatch caused by the stub effect caused by reverse soldering.

[0081] The reverse soldering structure of the busbar connecting wire of the present invention is that each welding end 23 faces the opposite direction to the plug-in side 12, and the line row 20 extends along the line-out direction D and faces the same direction as the plug-in side 12, so that the reverse soldering can be used to achieve the effect of reversing the line out; at the same time, each first buried section 41 is buried in the circuit board 10 and connected to the side of the welding area 13 away from the plug-in side 12, and each first extension section 42 is connected to the first docking area 14 and the corresponding first buried sections 41, so that the signal can directly enter each first buried section 41 after passing through each welding end 23, and then be transmitted to the first docking area 14 and the connector 30 through each first extension section 42, thereby avoiding the signal from taking additional repeated paths, thereby preventing the signal attenuation and impedance mismatch problems caused by the stub effect.

[0082] In summary, the present invention has industrial applicability, novelty and advancement. The present invention may also have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field can evolve various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the patent applied for the present invention.

Claims

1. A busbar connecting wire reverse welding structure, characterized in that: include: A circuit board having a wiring side and a plug-in side opposite to each other, the circuit board having a welding area and a first docking area and defining a wire outlet direction, the welding area is located on the wiring side, the first docking area is located on the plug-in side, and the wire outlet direction is from the wiring side toward the plug-in side; A line array, comprising a main body section, an attachment section and a plurality of welding ends, wherein the main body section extends along the line-outward direction, the attachment section extends from the main body section in the opposite direction of the line-outward direction and is attached to the circuit board, and each welding end extends from the attachment section in the opposite direction of the line-outward direction and is electrically connected to the welding area; and A plurality of first circuits are arranged on the circuit board, each of the first circuits comprises a first buried section and a first extension section, each of the first buried sections is buried in the circuit board and connected to a side of the welding area away from the plug-in side, and each of the first extension sections is connected to the first docking area and the corresponding first buried sections.

2. The busbar connecting wire reverse welding structure according to claim 1, characterized in that: It also includes multiple second circuits. The circuit board has a second docking area, which is located on the plug-in side. The first docking area and the second docking area are respectively located on two opposite sides of the circuit board. Each of the second circuits includes a second buried section and a second extension section. Each of the second buried sections is buried in the circuit board and connected to a side of the welding area away from the plug-in side. Each of the second extension sections connects the second docking area and the corresponding second buried sections.

3. The busbar connecting wire reverse welding structure according to claim 1, characterized in that: The circuit board has a first surface and a second surface opposite to each other. The first docking area is arranged on the first surface, the welding area is arranged on the second surface, and each of the first extension sections is arranged on the first surface.

4. The busbar connecting wire reverse welding structure according to claim 3, characterized in that: It also includes multiple second circuits, the circuit board has a second docking area, the second docking area is located on the plug-in side and is arranged on the second surface, each of the second circuits includes a second buried section and a second extension section, each of the second buried sections is buried in the circuit board and connected to the side of the welding area away from the plug-in side, in each of the second extension sections, the second extension section includes a first exposed portion, a buried portion and a second exposed portion, the buried portion is buried in the circuit board, the two ends of the first exposed portion are respectively connected to the second buried section and the buried portion, and the two ends of the second exposed portion are respectively connected to the buried portion and the second docking area.

5. The busbar connecting wire reverse welding structure according to claim 1, characterized in that: The circuit board has a first surface and a second surface opposite to each other. The first docking area is arranged on the first surface, the welding area is arranged on the second surface, and each of the first extension sections is buried in the circuit board.

6. The busbar connecting wire reverse welding structure according to claim 5, characterized in that: In each of the first extension sections, the first extension section includes a first extension portion and a first connection portion. The first extension portion is connected to the corresponding first embedded section, and the first connection portion is connected to the first extension portion and the first docking area.

7. The busbar connecting wire reverse welding structure according to claim 5, characterized in that: It also includes multiple second circuits, the circuit board has a second docking area, the second docking area is located on the plug-in side and is arranged on the second surface, each of the second circuits includes a second buried section and a second extension section, each of the second buried sections is buried in the circuit board and connected to the side of the welding area away from the plug-in side, and each of the second extension sections is buried in the circuit board and connects the second docking area and the corresponding second buried sections.

8. The busbar connecting wire reverse welding structure according to claim 7, characterized in that: In each of the second extension sections, the second extension section includes a second extension portion and a second connection portion. The second extension portion is connected to the corresponding second embedded section, and the second connection portion is connected to the second extension portion and the second docking area.

9. The busbar connecting wire reverse welding structure according to claim 1, characterized in that: It also includes a connector, which is arranged on the plug-in side. The body section includes an inclined portion and a straight portion. The inclined portion is obliquely connected between the attachment section and the straight portion so that the straight portion bypasses the outer edge of the connector.

10. The busbar connecting wire reverse welding structure according to claim 1, characterized in that: The invention also comprises a fixing member, which is arranged on the wiring side and covers each welding end and at least a part of the attachment section.

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