Electrical device and method of manufacturing the same

Abstract

An electrical device (10) includes: a first welded body (1) having a first metal part (11) and a first resin part (12) covering a portion of the first metal part (11); and a second welded body (2) having a second metal part (21) and a second resin part (22) covering a portion of the second metal part (21). The first metal part (11) has a first upright end portion (13) exposed from the first resin part (12) and upright. The second metal part (21) has a second upright terminal portion (23) exposed from the second resin part (22) and upright in the same upright direction (Z1) as the first upright terminal portion (13). A welded portion (3) is formed by welding the first upright terminal portion (13) and the second upright terminal portion (23) to each other. The first resin portion (12) and the second resin portion (22) are arranged so that they partially overlap each other when viewed from the upright direction (Z1). The welding portion (3) is accommodated within the projection area of ​​the first resin portion (12) and the second resin portion (22) in the erection direction (Z1).

Description

[0001] Citation of related applications

[0002] This application is based on Japanese Patent Application No. 2019-231850 filed on December 23, 2019, the contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to an electrical device and a method for manufacturing the same. Background Art

[0004] Electrical equipment often uses welds to join metal parts, such as wiring components. During welding, weld slag (also known as "weld spatter") can fly. If this slag adheres to other parts of the electrical equipment, it can cause various problems.

[0005] Patent Document 1 proposes a shape of a weld portion for preventing scattering of dirt (ie, slag).

[0006] Prior art literature

[0007] Patent Literature

[0008] Patent Document 1: Japanese Patent Application Laid-Open No. 2002-103056 Summary of the Invention

[0009] It is difficult to actually apply the shape of the welded portion in the welding method described in Patent Document 1 to a terminal portion in an electrical device. Therefore, a technology is desired that easily suppresses the influence of welding slag on the product during the manufacture of electrical devices.

[0010] The present disclosure provides an electrical device and a method for manufacturing the same that can easily suppress the influence of welding slag.

[0011] One embodiment of the present disclosure is an electrical device including a first object to be welded and a second object to be welded.

[0012] The first object to be welded includes a first metal portion and a first resin portion covering a portion of the first metal portion.

[0013] The second object to be welded includes a second metal portion and a second resin portion covering a portion of the second metal portion.

[0014] The first metal portion includes a first upright terminal portion that is exposed from the first resin portion and is upright.

[0015] The second metal portion includes a second upright terminal portion exposed from the second resin portion and upright in the same upright direction as the first upright terminal portion.

[0016] The electrical device is formed with a welded portion formed by welding the first upright terminal portion and the second upright terminal portion to each other.

[0017] The first resin portion and the second resin portion are arranged so as to partially overlap each other when viewed from the upright direction, and

[0018] The weld portion is accommodated within a projection area of ​​the first resin portion and the second resin portion in the upright direction.

[0019] Another embodiment of the present disclosure is a method for manufacturing an electrical device, the electrical device comprising a first object to be welded and a second object to be welded, the first object to be welded comprising a first metal portion and a first resin portion covering a portion of the first metal portion, the second object to be welded comprising a second metal portion and a second resin portion covering a portion of the second metal portion,

[0020] The first metal portion includes a first upright terminal portion that is exposed from the first resin portion and is upright.

[0021] The second metal portion includes a second upright terminal portion exposed from the second resin portion and upright in the same upright direction as the first upright terminal portion.

[0022] The first resin portion and the second resin portion are arranged so as to partially overlap each other when viewed from the upright direction.

[0023] The welding portions of the first upright terminal portion and the second upright terminal portion are arranged so as to be accommodated within the projection areas of the first resin portion and the second resin portion in the upright direction.

[0024] The welded portion is formed by welding the welded portion while a surrounding jig is disposed around the first and second upright terminal portions so as to surround at least the welded portion in a direction perpendicular to the upright direction.

[0025] In the above-described electrical device, the first and second resin portions are arranged so as to partially overlap each other when viewed from the upright orientation. Furthermore, the weld portion is contained within the projections of the first and second resin portions in the upright orientation. This prevents welding slag generated during welding of the first and second upright terminal portions from being directed toward the opposite sides of the first and second resin portions. This limits the range of welding slag scattering within the electrical device. Consequently, an electrical device can be provided that readily suppresses the effects of welding slag.

[0026] In the above-described method for manufacturing an electrical device, welding is performed at the welded portion with the surrounding jig positioned around the first and second upright terminal portions. This allows the first and second resin portions, as well as the surrounding jig, to shield the weld slag from scattering. Consequently, a method for manufacturing an electrical device that easily suppresses the effects of weld slag can be provided.

[0027] As described above, according to the above aspect, it is possible to provide an electrical device and a method for manufacturing the same that can easily suppress the influence of welding slag. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and other objects, features and advantages of the present disclosure will become more apparent with reference to the accompanying drawings and in conjunction with the following detailed description.

[0029] Figure 1 This is a cross-sectional view of a portion of the electrical device in the first embodiment, which is equivalent to Figure 2 Figure 2 is a cross-section viewed along line II.

[0030] Figure 2 This is a top view of the vicinity of the welding portion in the first embodiment, which is equivalent to Figure 1 The diagram is viewed from the II direction.

[0031] Figure 3 This is a front view of the second welded body in the first embodiment, which is equivalent to Figure 1 The III-view diagram.

[0032] Figure 4 This is a plan view explanatory diagram of the electric device in the first embodiment.

[0033] Figure 5 It is an explanatory diagram of the method for manufacturing an electric device in the first embodiment and is a cross-sectional explanatory diagram showing a state before a surrounding jig is arranged around a welded portion.

[0034] Figure 6 It is a cross-sectional explanatory diagram showing the state during welding in the first embodiment.

[0035] Figure 7 yes Figure 6 Cross-sectional view taken along line VI, IV, and II.

[0036] Figure 8 This is a plan view of the enclosing jig in the first embodiment.

[0037] Figure 9 This is an overall plan view of a state where the enclosing jig is arranged on the electrical equipment in the first embodiment.

[0038] Figure 10 yes Figure 6 Cross-sectional view along line XX.

[0039] Figure 11 This is a cross-sectional explanatory diagram of a portion of the electric device in the second embodiment.

[0040] Figure 12 This is a cross-sectional explanatory diagram of a portion of the electric device in the third embodiment.

[0041] Figure 13 This is a cross-sectional explanatory diagram of a portion of the electric device in the fourth embodiment. DETAILED DESCRIPTION

[0042] (Implementation Method 1)

[0043] Reference Figures 1 to 10 , an embodiment of an electrical device and a method for manufacturing the same are described.

[0044] like Figure 1 、 Figure 2 As shown, electrical device 10 of this embodiment includes a first object to be welded 1 and a second object to be welded 2. First object to be welded 1 includes a first metal portion 11 and a first resin portion 12. First resin portion 12 covers a portion of first metal portion 11. Second object to be welded 2 includes a second metal portion 21 and a second resin portion 22. Second resin portion 22 covers a portion of second metal portion 21.

[0045] The first metal portion 11 includes a first upright terminal portion 13 . The first upright terminal portion 13 is a portion exposed from the first resin portion 12 and upright.

[0046] The second metal portion 21 has a second upright end portion 23 . The second upright terminal portion 23 is exposed from the second resin portion 22 and is upright in the same upright direction Z1 as the first upright terminal portion 13 .

[0047] In the electrical device 10 , a welded portion 3 is formed where the first upright terminal portion 13 and the second upright terminal portion 23 are welded to each other.

[0048] like Figure 2 As shown, the first resin portion 12 and the second resin portion 22 are arranged so as to partially overlap each other when viewed in the standing direction Z1. Furthermore, the welded portion 3 is contained within the projection area of ​​the first resin portion 12 and the second resin portion 22 in the standing direction Z1. In this embodiment, the welded portion 3 is contained within the projection area of ​​the second resin portion 22 in the standing direction Z1.

[0049] Hereinafter, the erection direction Z1 of the first and second erection terminal portions 13 and 23 will be simply referred to as the Z1 direction. In particular, when the orientation does not need to be specified, the direction parallel to the Z1 direction will be simply referred to as the Z direction.

[0050] like Figures 1 to 3 As shown, at least one of the first resin portion 12 and the second resin portion 22 has a flange portion 221 extending in a direction perpendicular to the Z direction. In this embodiment, the second resin portion 22 has the flange portion 221. The flange portion 221 is formed at the end portion of the second resin portion 22 in the Z1 direction. In other words, the end surface of the flange portion 221 facing the Z1 direction is coplanar with the end surface of the second resin portion 22 facing the Z1 direction.

[0051] When viewed from the erection direction Z1, the eaves portion 221 extends in at least three directions: the adjacent side and the opposite side of the first resin portion 12 and the second resin portion 22, and both sides of a direction perpendicular to the adjacent direction X. The adjacent direction X is also referred to as the X direction. Furthermore, the direction perpendicular to both the X direction and the Z direction is appropriately referred to as the Y direction.

[0052] In this embodiment, the flange portion 221 also protrudes toward the adjacent sides of the first resin portion 12 and the second resin portion 22. That is, the flange portion 221 of the second resin portion 22 protrudes toward both sides in the X direction and both sides in the Y direction.

[0053] In this embodiment, the electrical device 10 is a DC-DC converter. Figure 4 As shown, the DC-DC converter has a transformer Tr. In addition, the DC-DC converter has electronic circuit parts such as a switching circuit part, a rectifier circuit part, and a filter circuit part. As a part of the electronic circuit part, the electrical device 10 has an electronic circuit substrate 4. In addition, as shown Figure 1 As shown, electronic components such as a semiconductor module 41 are mounted on an electronic circuit board 4. These electronic components also constitute part of the electronic circuit unit. Furthermore, the electrical device 10 includes a housing 5 that houses components such as the transformer Tr, the electronic circuit board 4, and various electronic components. The housing 5 can be made of a metal such as an aluminum alloy, for example.

[0054] In this embodiment, the first welded object 1 is a portion of a transformer Tr. Specifically, the first metal portion 11 of the first welded object 1 constitutes the primary coil of the transformer Tr and its terminals. Furthermore, the first resin portion 12 is at least a portion of a bobbin that covers a portion of the primary coil of the transformer Tr. A portion of the first metal portion 11 extending in the X direction is disposed within the first resin portion 12. Furthermore, the first metal portion 11 is bent in the Z1 direction at the portion exposed from the first resin portion 12 in one direction in the X direction, forming a first upright terminal portion 13.

[0055] The second welded body 2 electrically connects the terminal of the primary coil of the transformer Tr (i.e., the first upright terminal portion 13) to the electronic circuit substrate 4. One end of the second metal portion 21 of the second welded body 2 serves as the second upright terminal portion 23, and the other end serves as the substrate connection portion 24 connected to the electronic circuit substrate 4. In addition, a portion of the second metal portion 21 between the second upright end portion 23 and the substrate connection portion 24 is embedded in the second resin portion 22. The second metal portion 21 protrudes from the second resin portion 22 in the Z1 direction and forms the second upright terminal portion 23. In addition, the second metal portion 21 has a portion protruding from the second resin portion 22 in one direction of the X direction and a portion further upright in the Z1 direction from the protruding end of the portion. The portion upright in the Z1 direction is connected to the electronic circuit substrate 4 and serves as the substrate connection portion 24. The substrate connection portion 24 is inserted into a through-hole formed in the electronic circuit substrate 4 and connected by solder or the like.

[0056] The second upright terminal portion 23 has a curved protrusion 231 that is curved so as to protrude toward the first upright terminal portion 13 in the X direction. The curved protrusion 231 abuts against the first upright terminal portion 13 and is welded thereto.

[0057] The semiconductor module 41 incorporates semiconductor elements such as IGBTs (insulated gate bipolar transistors) and MOSFETs (MOS field effect transistors). Although not shown, electronic components such as capacitors, choke coils, and diodes are also included. These electronic components are connected to the electronic circuit board 4.

[0058] The electronic circuit portion is disposed opposite the solder portion 3 across at least one of the first resin portion 12 and the second resin portion 22. In this embodiment, the electronic circuit board 4 is disposed opposite the solder portion 3 across at least one of the first resin portion 12 and the second resin portion 22.

[0059] The housing 5 includes an opening in the Z1 direction, which is closed by a cover (not shown). The housing 5 also has a bottom wall 51 in the Z2 direction, which is the opposite side of the Z1 direction. The electronic circuit board 4 is disposed closer to the bottom wall 51 than the first resin portion 12. The main surface of the electronic circuit board 4 faces the Z direction.

[0060] like Figure 4As shown, the transformer Tr includes two primary coils, each of which has two terminals forming a first welded object 1. Furthermore, a second welded object 2 is connected to each first welded object 1, thereby forming a welded portion 3. That is, in this embodiment, the electrical device 10 includes at least two welded portions 3. Alternatively, the two first welded objects 1 may share a first resin portion 12. Alternatively, the two second welded objects 2 may share a second resin portion 22.

[0061] Next, a method for manufacturing the electric device 10 according to the present embodiment will be described.

[0062] like Figure 5 As shown, the first resin portion 12 and the second resin portion 22 are arranged so as to partially overlap each other when viewed from the Z direction. The welding points 30 in the first and second upright terminal portions 13 and 23 are arranged so as to be within the projection areas of the first and second resin portions 12 and 22 in the Z direction.

[0063] Then, if Figure 6 、 Figure 7 As shown, a surrounding jig 61 is positioned around the first upright terminal portion 13 and the second upright terminal portion 23. The surrounding jig 61 surrounds at least the welded portion 30 from a direction perpendicular to the upright direction Z1. In this state, the welded portion 30 is welded to form the welded portion 3. In this embodiment, the surrounding jig 61 surrounds at least a portion of the first upright terminal portion 13 and the second upright terminal portion 23 on the Z2 side.

[0064] In addition, if Figure 5 As shown, when welding the first welded object 1 and the second welded object 2, after assembling the components into the housing 5, the opening of the housing 5 is oriented downward in the plumb direction. In other words, the vertical direction Z1 of the first vertical terminal portion 13 and the second vertical terminal portion 23 is oriented downward in the plumb direction. In this state, as shown in FIG. Figure 6 As shown, the surrounding jig 61 is arranged at a predetermined position around the welding portion 30 from below.

[0065] like Figures 5 to 8 As shown, the surrounding fixture 61 has a first surrounding portion 611 and a second surrounding portion 612. The first surrounding portion 611 surrounds the welding portion 30, and the second surrounding portion 612 surrounds the first upright terminal portion 13 and the second upright terminal portion 23, which are closer to the Z2 side than the welding portion 30. In this embodiment, as shown in FIG. Figure 8 As shown, the surrounding fixture 61 has a first surrounding portion 611 and two second surrounding portions 612. Figures 5 to 8As shown, the first surrounding portion 611 includes a peripheral wall portion 611a that circumferentially surrounds the weld portion 30 in a direction perpendicular to the Z direction, and an intermediate wall portion 611b. The peripheral wall portion 611a circumferentially surrounds the weld portion 30 in a direction perpendicular to the Z direction, and the intermediate wall portion 611b is connected to the Z2-side end of the peripheral wall portion 611a. Furthermore, a generally cylindrical second surrounding portion 612 is formed so as to protrude toward the Z2 side from two openings provided in the intermediate wall portion 611b.

[0066] like Figure 9 As shown, the two second surrounding portions 612 are arranged to respectively surround the two welding locations 30 in the electrical device 10. That is, the two second surrounding portions 612 are provided corresponding to the two sets of the first upright end portions 13 and the second upright end portions 23.

[0067] like Figure 5 、 Figure 6 As shown, the surrounding jig 61 has a first opposing portion 621 opposing the first resin portion 12 in the standing direction Z1 and a second opposing portion 622 opposing the second resin portion 22 in the standing direction Z1. The first opposing portion 621 and the second opposing portion 622 are positioned at different positions in the standing direction Z1.

[0068] That is, the second opposing portion 622 is formed closer to the Z2 side than the first opposing portion 621. This corresponds to the positional relationship between the first resin portion 12 and the second resin portion 22, which are opposed to each other. This allows the first opposing portion 621 of the enclosing jig 61 to be positioned in close proximity to the first resin portion 12, and the second opposing portion 622 of the enclosing jig 61 to be positioned in close proximity to the second resin portion 22. Furthermore, the first opposing portion 621 and the first resin portion 12 can be brought into contact with each other. Furthermore, the second opposing portion 622 and the second resin portion 22 can be brought into contact with each other.

[0069] like Figure 6 As shown, the surrounding clamp 61 is arranged so that at least a portion of the opening edge of the surrounding clamp 61 is opposite to the eaves portion 221 from the vertical direction Z1. Figure 10 As shown, the second relative portion 622 surrounding the clamp 61 is disposed opposite to the eaves portion 221. The second relative portion 622 is opposite to the eaves portion 221 extending in three directions.

[0070] Next, as described above, resistance welding is performed on the weld portion 30 while the surrounding jig 61 is arranged. When resistance welding is performed, the weld portion 30 is clamped by a pair of electrode members 63. Figure 6 As shown, in the welding portion 30 , the first and second upright terminal portions 13 and 23 are clamped from both sides in the X direction by a pair of electrode members 63 .

[0071] Next, current is passed between the pair of electrode members 63, causing the current to flow through the welded portion 30. The resulting Joule heat melts the welded portion 30, resulting in a bond. The first and second resin portions 12, 22 prevent the weld slag generated during this process from invading locations closer to the Z2 side. Furthermore, the surrounding jig 61 prevents the weld slag from scattering.

[0072] In addition, the electrode member 63 and the surrounding jig 61 may also be configured as a welding device formed integrally with each other. That is, the surrounding jig 61 may be installed on the welding device including the electrode member 63. In addition, the electrode member 63 and the surrounding jig 61 may also be separate from each other. That is, after the surrounding jig 61 independent of the welding device is arranged around the welding part 30, a pair of electrode members 63 of the welding device may be arranged at the welding part 30. In addition, in this embodiment, a method is shown in which the surrounding jig 61 includes a first surrounding portion 611 and a plurality of second surrounding portions 612, but this is not limited to this. The surrounding jig 61 may also include one first surrounding portion 611 and one second surrounding portion 612. In addition, the surrounding jig 61 may be formed as a whole into a roughly cylindrical shape, and there may be no particular boundary between the first surrounding portion 611 and the second surrounding portion 612.

[0073] Next, the effects of this embodiment will be described.

[0074] In the above-described electrical device 10, the first resin portion 12 and the second resin portion 22 are arranged so as to partially overlap each other when viewed in the Z direction. Furthermore, the weld portion 3 is contained within the projection area of ​​the first and second resin portions 12, 22 in the Z direction. This prevents welding slag from traveling toward the opposite side of the first and second resin portions 12, 22. This also limits the range of welding slag scattering within the electrical device 10. As a result, an electrical device 10 can be provided that easily suppresses the effects of welding slag.

[0075] Furthermore, in the above-described manufacturing method, welding is performed on weld portion 30 while surrounding jig 61 is positioned around first upright terminal portion 13 and second upright terminal portion 23. This allows the first resin portion 12, second resin portion 22, and surrounding jig 61 to shield the scattering of welding slag. Consequently, a method for manufacturing an electrical device that easily suppresses the effects of welding slag can be provided.

[0076] At least one of the first resin portion 12 and the second resin portion 22 includes a flange portion 221. This makes it easier to prevent welding from moving toward the opposite side of the first resin portion 12 and the second resin portion 22. Furthermore, during welding, the enclosing jig 61 is positioned so that at least a portion of its opening edge faces the flange portion 221 in the vertical direction Z1. This more effectively prevents the scattering of welding slag within the equipment.

[0077] The flange portion 221 extends in at least three directions: adjacent to and opposite to the first resin portion 12 and the second resin portion 22, as well as on both sides in the Y direction. This makes it easier to suppress the intrusion of welding slag over a wider range. Furthermore, by arranging the surrounding jig 61 opposite the flange portion 221, the scattering of welding slag can be more effectively prevented.

[0078] An electronic circuit portion (i.e., electronic circuit board 4, semiconductor module 41, etc.) is positioned opposite soldering portion 3, sandwiching at least one of first resin portion 12 and second resin portion 22. This prevents solder slag from flying onto the electronic circuit portion. Consequently, the effects of solder slag on the electronic circuit portion can be minimized.

[0079] The enclosing jig 6 includes a first opposing portion 621 and a second opposing portion 622. Furthermore, the first opposing portion 621 and the second opposing portion 622 are positioned at different positions in the Z direction. This allows the enclosing jig 61 to be positioned in close proximity to the first resin portion 12 and the second resin portion 22, which are positioned at different positions in the Z direction. As a result, the scattering of welding slag can be more effectively prevented.

[0080] As described above, according to the present embodiment, it is possible to provide an electrical device and a method for manufacturing the same that can easily suppress the influence of welding slag.

[0081] (Implementation Method 2)

[0082] like Figure 11 As shown, this embodiment is a mode in which both the first resin portion 12 of the first object to be welded 1 and the second resin portion 22 of the second object to be welded 2 include flange portions 121 and 221 .

[0083] The first metal portion 11 protrudes from the first resin portion 12 in the Z1 direction. The first metal portion 11 stands in the protruding direction from the first resin portion 12 and forms a first standing end portion 13. The first metal portion 11 is bent inside the first resin portion 12.

[0084] The other structures are the same as those in Embodiment 1. Unless otherwise specified, the same reference numerals used in Embodiment 2 and thereafter as those used in the previous embodiment represent the same components as those in the previous embodiment.

[0085] This embodiment can also provide an electrical device and a method for manufacturing the same that can easily suppress the influence of welding slag.

[0086] (Implementation 3)

[0087] like Figure 12 As shown, this embodiment is a mode in which a notched step portion 222 is provided at the end portion of the second resin portion 22 in the Z1 direction.

[0088] The first resin portion 12 is disposed so as to face the surface facing the Z1 side of the notch step portion 222. The other structures are the same as those of the first embodiment.

[0089] This embodiment can also provide an electrical device and a method for manufacturing the same that can easily suppress the influence of welding slag.

[0090] (Implementation 4)

[0091] like Figure 13 As shown, in this embodiment, the first metal portion 11 is bent within the first resin portion 12 , and the second metal portion 21 is also bent within the second resin portion 22 .

[0092] Furthermore, the first resin portion 12 and the second resin portion 22 are formed so as to have a relatively large dimension in a direction perpendicular to the Z direction. In this embodiment, neither the first resin portion 12 nor the second resin portion 22 has a flange portion. Other structures are the same as those in the first embodiment.

[0093] This embodiment can also provide an electrical device and a method for manufacturing the same that can easily suppress the influence of welding slag.

[0094] The present disclosure is not limited to the above-described embodiments, but can be applied to various embodiments without departing from the spirit of the present invention.

[0095] While the present disclosure has been described based on embodiments, it should be understood that the present disclosure is not limited to such embodiments or configurations. The present disclosure also encompasses various modifications and variations within the scope of equivalents. Furthermore, various combinations and methods, including combinations and methods that further include only one element, more than one element, or less than one element, also fall within the scope and spirit of the present disclosure.

Claims

1. An electrical device, comprising: a first object to be welded, the first object to be welded having a first metal portion and a first resin portion covering a portion of the first metal portion; a second object to be welded, the second object to be welded having a second metal portion and a second resin portion covering a portion of the second metal portion; a housing for housing a plurality of components including the first object to be welded and the second object to be welded; as well as An electronic circuit unit as a part of the plurality of components, the electronic circuit unit being arranged in the housing, The first metal portion has a first upright terminal portion that is exposed from the first resin portion and is upright. The second metal portion includes a second upright terminal portion exposed from the second resin portion and upright in the same upright direction as the first upright terminal portion. The electrical device is formed with a welded portion formed by welding the first upright terminal portion and the second upright terminal portion to each other. The first resin portion and the second resin portion are arranged so as to partially overlap each other when viewed from the standing direction, and The welding portion is contained within the projection area of ​​the first resin portion and the second resin portion in the erecting direction. When viewed from the upright direction, the welding portion is arranged at a position overlapping with the second resin portion. The first resin portion is arranged on a side closer to the welding portion in the standing direction than the second resin portion. At least the second resin portion includes: a main body portion having an elongated shape in a direction parallel to the erecting direction; and an eaves portion extending from the main body in a direction perpendicular to the erection direction, The eaves portion extends from an end portion of the main body portion in the upright direction further than the main body portion in a direction perpendicular to the upright direction, and when viewed from the upright direction, the eaves portion extends in at least three directions: a side opposite to adjacent sides of the first resin portion and the second resin portion and both sides of a direction perpendicular to the adjacent direction. The electronic circuit portion is arranged at a position opposite to the solder portion across at least one of the first resin portion and the second resin portion. When viewed from the upright direction, the electronic circuit portion is arranged so as to protrude on both sides of the first resin portion and the second resin portion in the adjacent direction. The eaves portion is arranged between the soldering portion and the electronic circuit portion in the upright direction.

2. A method for manufacturing an electrical device, The electrical device includes a first object to be welded and a second object to be welded, wherein the first object to be welded includes a first metal portion and a first resin portion covering a portion of the first metal portion, and the second object to be welded includes a second metal portion and a second resin portion covering a portion of the second metal portion. The first metal portion has a first upright terminal portion that is exposed from the first resin portion and is upright. The second metal portion includes a second upright terminal portion exposed from the second resin portion and upright in the same upright direction as the first upright terminal portion. The first resin portion and the second resin portion are arranged so as to partially overlap each other when viewed from the standing direction. The welding locations of the first upright terminal portion and the second upright terminal portion are arranged so as to be within the projection areas of the first resin portion and the second resin portion in the upright direction. The welding portion is formed by welding the welding portion in a state where a surrounding jig is arranged around the first and second upright terminal portions so as to surround at least the welding portion in a direction perpendicular to the upright direction. At least one of the first resin portion and the second resin portion includes: A main body having an elongated shape in a direction parallel to the erection direction; and an eaves portion extending from the main body in a direction perpendicular to the erection direction, The eaves portion extends from the end of the main body portion in the standing direction, further than the main body portion in a direction perpendicular to the standing direction. The enclosing jig is arranged so that at least a portion of the opening end edge of the enclosing jig faces the eaves portion from the upright direction. The electronic circuit portion is arranged at a position opposite to the soldering portion across at least one of the first resin portion and the second resin portion.

3. The method for manufacturing an electrical device according to claim 2, wherein: When viewed from the standing direction, the eaves portion extends in at least three directions: a side opposite to a side adjacent to the first resin portion and the second resin portion, and both sides in a direction orthogonal to the adjacent direction.

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