JP7415873B2 - Electrical components and methods of manufacturing electrical components - Google Patents

Description

The disclosure herein relates to electrical components and methods of manufacturing electrical components.

Patent Document 1 describes a motor device including a printed circuit board and terminals.

JP 2019-33599 Publication

In the motor device of Patent Document 1, the terminals are mechanically connected to the printed circuit board. When an external force is applied to the terminal, there is a possibility that stress will be concentrated at the connection point between the terminal (connection terminal) and the printed circuit board (connected member).

Therefore, an object of the present disclosure is to provide an electrical component and a method for manufacturing an electrical product in which stress is suppressed from being applied to the connection portion between a connecting terminal and a connected member.

An electrical component according to one aspect of the present disclosure includes:
A connected member (400);
A connection terminal (500) connected to a connected member,
The connection terminal includes a connection portion (501) connected to the connected member, a first conductive portion (510) connected to the connection portion and partially extending in the first direction, and a first conductive portion (510) connected to the first conductive portion and partially extending in the first direction. has a second conductive part (520) extending in a second direction different from the first direction,
The portion of the first conductive portion extending in the first direction includes a first stress relaxation portion (540) that relieves stress applied to the connection portion between the connection portion and the connected member;
A portion of the second conductive portion extending in the second direction includes a second stress relaxation portion (550) that relieves stress applied to the first conductive portion;
It further includes a coating resin (800) that covers the first stress relaxation section, the second stress relaxation section, and the connected member.

Further, a method for manufacturing an electrical component according to one embodiment of the present disclosure includes:
A connected member (400);
A connection terminal (500) connected to a connected member,
The connection terminal includes a connection portion (501) connected to the connected member, a first conductive portion (510) connected to the connection portion and partially extending in the first direction, and a first conductive portion (510) connected to the first conductive portion and partially extending in the first direction. has a second conductive part (520) extending in a second direction different from the first direction,
The portion of the first conductive portion extending in the first direction includes a first stress relaxation portion (540) that relieves stress applied to the connection portion between the connection portion and the connected member;
A portion of the second conductive portion extending in the second direction includes a second stress relaxation portion (550) that relieves stress applied to the first conductive portion ;
A method for manufacturing an electrical component , further comprising a first stress relaxation part, a second stress relaxation part, and a coating resin (800) that covers a connected member ,
preparing a fixing part (700) including a first positioning part (710) that determines the position of the connected member and a second positioning part (720) that determines the position of the connection terminal;
After connecting the connecting part to the connected member, a part of the connected member is placed in the first positioning part, and a part of the connecting terminal that is further away from the connecting part than the second stress relaxation part is placed in the second positioning part. A method of manufacturing electrical components to be placed.

According to this, even if an external force is applied to a portion of the connection terminal (500) that is farther away from the connection portion (501) than the second stress relief portion (550), the first stress relief portion (540) and the first stress relief portion (540) The stress applied to the connection point between the connected member (400) and the connection part (501) is easily relaxed by the two stress relaxation parts (550).

Note that the reference numbers in parentheses above merely indicate correspondence with the configurations described in the embodiments described later, and do not limit the technical scope in any way.

FIG. 2 is a schematic diagram illustrating an electric steering device. It is a top view explaining the connection form of a controller and a motor. It is a perspective view of a controller. FIG. 3 is a perspective view of the controller excluding the coating resin. It is a perspective view explaining a control board. It is a perspective view explaining a connection terminal. It is a top view explaining a 1st stress relaxation part and a 2nd stress relaxation part. FIG. 6 is a top view illustrating positioning of the controller to the fixed part. 9 is a cross-sectional view illustrating positioning of the control board along line IX-IX shown in FIG. 8. FIG. 9 is a cross-sectional view illustrating positioning of the connection terminal along line XX shown in FIG. 8. FIG. 9 is a cross-sectional view illustrating the shape of the connection terminal along the line XI-XI shown in FIG. 8. FIG. It is a perspective view explaining the modification of a controller.

Hereinafter, a plurality of embodiments for carrying out the present disclosure will be described with reference to the drawings. In each form, parts corresponding to matters explained in the preceding form may be given the same reference numerals and redundant explanation may be omitted. When only a part of the configuration is described in each form, the other forms previously described can be applied to other parts of the structure.

In addition, it is not only possible to combine parts that are explicitly shown to be combinable in each embodiment, but also to combine embodiments with each other even if it is not explicitly stated, or between embodiments and modified examples, as long as there is no particular problem with the combination. It is also possible to partially combine the modified examples.

(First embodiment)
An electric power steering device 200 to which a controller 300 according to the present embodiment is applied will be explained based on FIG. 1. Note that the controller 300 is not limited to application to the electric power steering device 200. The controller 300 corresponds to an electrical component.

<Steering system>
As shown in FIG. 1, an electric power steering device 200 is applied to a steering system 100 of a vehicle. The steering system 100 includes a steering wheel 110, a steering shaft 120, a pinion gear 130, a rack shaft 140, wheels 150, and an electric power steering device 200.

Steering wheel 110 is connected to steering shaft 120. A pinion gear 130 is provided at the tip of the steering shaft 120. The pinion gear 130 meshes with the rack shaft 140. A pair of wheels 150 are connected to both ends of the rack shaft 140 via tie rods or the like.

When the driver rotates the steering wheel 110, a steering shaft 120 connected to the steering wheel 110 rotates. This rotational movement of steering shaft 120 is converted into linear movement of rack shaft 140 by pinion gear 130. As a result, the pair of wheels 150 are steered to an angle corresponding to the amount of displacement of the rack shaft 140.

<Electric power steering device>
The electric power steering device 200 functions to assist the rotation of the steering wheel 110. The electric power steering device 200 includes a torque sensor 210, a reduction gear 220, and a drive device 320 shown in FIG. Note that in the drawings, the torque sensor 210 is abbreviated as "TSS".

The drive device 320 includes a controller 300 and a motor 310. As shown in FIGS. 1 and 2, the motor 310 and the controller 300 are integrally connected. The drive device 320 has a so-called mechanical and electrical integrated type configuration. Note that in the drawings, the controller 300 is abbreviated as "CTR". The motor 310 is abbreviated as "MTR".

Torque sensor 210 functions to detect steering torque of steering shaft 120. Steering torque detected by torque sensor 210 is input to controller 300.

The controller 300 controls the drive of the motor 310 based on the steering torque detected by the torque sensor 210 and signals input from various ECUs mounted on the vehicle.

Motor 310 is connected to reduction gear 220 via a belt (not shown). The reduction gear 220 reduces the rotation of the motor 310 and transmits the rotation to the steering shaft 120. This assists the rotation (steering) of the steering wheel 110.

As described above, the electric power steering device 200 of this embodiment has a column assist type configuration that applies an assist force to the steering shaft 120 to assist steering. However, the configuration of the electric power steering device 200 is not limited to the above example. As the configuration of the electric power steering device 200, a rack assist type that applies an assist force to the rack shaft 140 or a pinion assist type that applies an assist force to the pinion gear 130 can also be adopted.

<Controller>
Next, the controller 300 will be explained in detail. In this regard, three mutually orthogonal directions are hereinafter referred to as an x direction, a y direction, and a z direction. The x direction corresponds to the first direction. The y direction corresponds to the second direction. Note that in the drawings, the description of "direction" is omitted.

As shown in FIGS. 2 to 4, the controller 300 includes a control board 400, a connection terminal 500, and a coating resin 800. The control board 400 corresponds to a connected member.

As shown in FIG. 5, the control board 400 has a flat shape with a thin thickness in the z direction. The control board 400 has a first main surface 400a and a second main surface 400b that are aligned in the z direction. A connection hole 401 and a board positioning hole 411 are formed in the control board 400, passing through the first main surface 400a and the second main surface 400b.

The connection hole 401 is formed at the center of the control board 400, spaced apart from the edge of the control board 400. The board positioning hole 411 is cut out from the end of the control board 400 and extends in the x direction and the y direction, respectively.

Note that a plurality of board positioning holes 411 may be formed in the control board 400. In that case, each of the plurality of substrate positioning holes 411 does not have to have the same shape.

The connection terminal 500 is made of a material containing an electrically conductive member. Further, the connection terminal 500 has elasticity. The connection terminal 500 plays the role of electrically connecting the motor 310 to an electronic component (not shown) mounted on the control board 400.

A conductive pattern (not shown) that is electrically connected to electronic components is printed on the control board 400. The connection terminal 500 is mechanically connected to the control board 400 via solder or the like so that the conductive pattern and the motor 310 are electrically connected.

As shown in FIG. 6, the connection terminal 500 includes a substrate connecting portion 501, a first conductive portion 510 connected to the substrate connecting portion 501, a second conductive portion 520 connected to the first conductive portion 510, and a second conductive portion 520 connected to the first conductive portion 510. It has a motor connection part 560 connected to part 520. The board connection section 501 corresponds to a connection section.

The board connection part 501 is a part that is mechanically and electrically connected to the control board 400 via solder or the like. The motor connection portion 560 is a portion that is mechanically and electrically connected to the motor terminal 311 of the motor 310 by welding or the like.

The first conductive part 510 has a first extension part 511, a second extension part 512, and a third extension part 513. The first extension part 511 extends in the z direction away from the board connection part 501. The second extension part 512 extends in the y direction away from the first extension part 511. The third extension part 513 extends in the x direction away from the second extension part 512.

The second conductive part 520 has a fourth extension part 521 , a fifth extension part 522 , and a sixth extension part 523 . The fourth extension part 521 extends in the y direction away from the third extension part 513. The fifth extension part 522 extends in the z direction away from the fourth extension part 521. The sixth extension part 523 extends in the y direction away from the fifth extension part 522. A motor connection portion 560 is connected to an end of the sixth extension portion 523 that is spaced apart from the fifth extension portion 522 .

The coating resin 800 is a resin member that covers part of the control board 400 and the connection terminals 500. The specific covering form will be explained in detail later.

<First stress relaxation part>
As described above, the connection terminal 500 has the first conductive part 510 including the third extension part 513 extending in the x direction. As shown in FIG. 7, the third extension part 513 is formed with a first stress relaxation part 540 having a bellows shape that repeats mountain folds and valley folds in the y direction.

Even if an external force in at least one of the x and y directions is applied to a portion of the connection terminal 500 closer to the second conductive part 520 than the first stress relaxation part 540, the first stress relaxation part 540 Each of them is designed to curve aggressively.

Accordingly, external force is less likely to be applied to the board connection portion 502 of the connection portion between the board connection portion 501 and the control board 400 that is closer to the substrate connection portion 501 than the first stress relaxation portion 540 .

Note that the first stress relaxation section 540 does not have to have a bellows shape. Although not shown, the first stress relaxation section 540 may be thinner in the y direction, for example. Further, although not shown, for example, a part of the first stress relaxation part 540 may have a bellows shape, and the remaining part may have a thinner thickness in the y direction. In either case, external force is less likely to be applied to the board connection portion 502 of the connection portion between the board connection portion 501 and the control board 400 that is closer to the substrate connection portion 501 than the first stress relaxation portion 540 . In the drawing, the first stress relaxation part 540 is shown surrounded by a broken line.

<Second stress relaxation part>
As described above, the connection terminal 500 has the second conductive part 520 including the fourth extension part 521 extending in the y direction. As shown in FIGS. 7 and 11, the fourth extension portion 521 is formed with a second stress relaxation portion 550 that has a bellows shape that repeats mountain folds and valley folds in the z direction.

Even if an external force is applied in at least one of the y direction and the z direction to a portion of the connection terminal 500 closer to the motor connection portion 560 than the second stress relaxation portion 550, the second stress relaxation portion 550 acts in the y direction and the z direction, respectively. It curves aggressively.

Accordingly, external force is less likely to be applied to the first conductive portion 510 on the substrate connection portion 501 side than the second stress relaxation portion 550. Furthermore, external force is less likely to be applied to the board connection part 502 of the connection part between the board connection part 501 and the control board 400 which is closer to the board connection part 501 than the second stress relaxation part 550 .

Note that the second stress relaxation section 550 does not have to have a bellows shape. Although not shown, the second stress relaxation section 550 may be thinner in the z direction, for example. Although not shown, for example, a part of the second stress relaxation part 550 may have a bellows shape, and the remaining part may have a thinner thickness in the z direction. In either case, external force is less likely to be applied to the board connection portion 502 of the connection portion between the board connection portion 501 and the control board 400 that is closer to the substrate connection portion 501 than the second stress relaxation portion 550 . In the drawing, the second stress relaxation section 550 is shown surrounded by a broken line.

<Connection form of control board and connection terminal>
As described above, the control board 400 is provided with the connection hole 401 that penetrates the first main surface 400a and the second main surface 400b. As described above, the connection terminal 500 is provided with the board connection part 501 that is connected to the control board 400.

As shown in FIGS. 4 to 6, the substrate connection portion 501 extends in the z direction. The board connection portion 501 is inserted into the connection hole 401. A board connecting portion 501 is mechanically connected to the control board 400 via solder (not shown). Specifically, the board connecting portion 501 is mechanically connected to the first main surface 400a, the second main surface 400b, and the wall surface of the connection hole 401 of the control board 400 via solder. Further, the substrate connecting portion 501 is electrically connected to, for example, a conductive pattern printed on the first main surface 400a via solder.

<Connection terminal and coating resin>
As described above, the coating resin 800 covers part of the control board 400 and the connection terminals 500.

Specifically, as shown in FIGS. 3 and 4, the coating resin 800 includes a control board 400, a board connection part 501, a first conductive part 510 including a first stress relaxation part 540, and a second stress relaxation part. A portion of the fourth extension 521 including the portion 550 is each covered.

Accordingly, the remaining portion of the fourth extension part 521 on the motor connection part 560 side, the fifth extension part 522, the sixth extension part 523, and the motor connection part 560 are exposed from the coating resin 800. These parts of the second conductive part 520 that are exposed from the coating resin 800 are collectively referred to as an exposed part 570 below.

Note that the portion of the connection terminal 500 that is closer to the motor connection portion 560 than the second stress relaxation portion 550 and the exposed portion 570 are the same portion. A portion of the connection terminal 500 closer to the motor connection portion 560 than the second stress relaxation portion 550 is exposed from the coating resin 800. In the drawing, a portion closer to the motor connection portion 560 than the broken line surrounding the second stress relaxation portion 550 corresponds to the exposed portion 570.

<Lower mold and upper mold>
Next, a method for manufacturing the controller 300 will be explained. Before explaining the manufacturing method in detail, the mechanical configurations of the lower die 700 and the upper die 900 will be explained. The lower mold 700 corresponds to a fixed part.

Each of the lower mold 700 and the upper mold 900 is a mold made of a member including, for example, steel.

As shown in FIG. 11, the lower mold 700 has a first opposing surface 700a that faces the upper mold 900 in the z direction, and a bottom surface 700b that is aligned with the first opposing surface 700a in the z direction.

As shown in FIGS. 8 to 11, a first cavity 730 and a fixing hole 720 recessed from the first opposing surface 700a toward the bottom surface 700b in the lower die 700 and the first opposing surface 700a from the surface of the first cavity 730 on the bottom surface 700b side. A positioning portion 710 is formed that stands up toward the substrate. The positioning section 710 corresponds to a first positioning section. The fixing hole 720 corresponds to a second positioning part. The first cavity 730 corresponds to a cavity.

The first cavity 730 is a hole filled with molten coating resin 800. Further, the first cavity 730 is also a hole in which a part of the control board 400 and the connection terminal 500 inserted into the coating resin 800 are provided.

Note that the part of the connection terminal 500 provided in the first cavity 730 refers to the substrate connection section 501 , the first conductive section 510 including the first stress relaxation section 540 , and the substrate connection section 501 including the second stress relaxation section 550 . This refers to a part of the fourth extension 521 on the side.

The fixing hole 720 is a hole in which the remaining portion of the connection terminal 500 is housed in the lower mold 700. The fixing hole 720 also serves as a positioning function for correcting the relative position between the board connection portion 502 and the motor connection portion 560.

The remaining portion of the connection terminal 500 provided in the fixing hole 720 is the exposed portion 570 described above.

The positioning part 710 is a part for fixing the positions of the control board 400 in the x direction and the y direction. As shown in FIGS. 8 and 9, the positioning portion 710 extends in the z direction from the bottom surface 700b side of the first cavity 730 toward the first opposing surface 700a, and is spaced apart from the wall surface of the first cavity 730 in the x direction. and the y direction, respectively.

As shown in FIG. 11, the upper mold 900 has a second opposing surface 900a that faces the lower mold 700 in the z direction, and a top surface 900b that is aligned with the second opposing surface 900a in the z direction.

A second cavity 910 is formed in the upper die 900 and is recessed from the second opposing surface 900a toward the top surface 900b. The second cavity 910 is a hole filled with molten coating resin 800. The second cavity 910 is also a hole in which a part of the connection terminal 500 inserted into the coating resin 800 is provided. Note that a part of the connection terminal 500 may not be provided in the second cavity 910.

<Manufacturing method of controller>
A method of manufacturing the controller 300 will be described. The method for manufacturing the controller 300 corresponds to the method for manufacturing electrical components. First, a lower mold 700 and an upper mold 900 are prepared.

Next, the board connecting portion 501 of the connecting terminal 500 is inserted into the connecting hole 401.

Next, the board connecting portion 501 and the control board 400 are mechanically and electrically connected using solder.

Next, as shown in FIGS. 8 and 9, the control board 400 is placed in the first cavity 730 so that the board positioning hole 411 passes through the positioning part 710. This defines the position of the control board 400 with respect to the lower mold 700. The control board 400 and a portion of the connection terminal 500 are provided in the first cavity 730 .

Next, as shown in FIG. 8, the exposed portion 570 is inserted into the fixing hole 720. To be more specific, as shown in FIG. 10, the exposed base portion 571 located closer to the motor connection portion 560 than the second stress relaxation portion 550 in the fourth extension portion 521 is located in the x direction, which partitions a part of the fixing hole 720. It is inserted into a region between the first partition wall surface 721 and the second partition wall surface 722 that are lined up.

As shown in FIG. 11, the fifth extension portion 522 is inserted into a portion between a third partition wall surface 723 and a fourth partition wall surface 724 that partition a part of the fixing hole 720 and are arranged in the y direction.

Although not shown, the sixth extension portion 523 is inserted into a region between two partition wall surfaces arranged in the x direction that are different from the first partition wall surface 721 and the second partition wall surface 722 that partition a part of the fixing hole 720.

Although not shown, the motor connecting portion 560 is inserted into a portion of the fixing hole 720 where the motor connecting portion 560 is accommodated.

Next, the lower mold 700 and the upper mold 900 are brought close to each other and clamped. By clamping the mold, the first cavity 730 and the second cavity 910 communicate with each other in the z direction as shown in FIG. 11 .

This communicating hole is filled with molten coating resin 800. The coating resin 800 filled in the communication hole cools and hardens in the communication hole. As a result, a portion of the control board 400 and the connection terminals 500 are inserted into the coating resin 800. At the same time as the mold is opened, the completed controller 300 is taken out from the lower mold 700 and the upper mold 900.

<Correction of misalignment>
In the process of connecting the board connecting portion 501 to the control board 400, a relative positional shift between the board connecting portion 502 and the exposed portion 570 may occur. To put it more specifically, a relative positional shift between the board connection portion 502 and the exposed base portion 571 may occur.

As described above, before inserting the exposed base 571 into the region between the first partition wall surface 721 and the second partition wall surface 722, the positioning part 710 is passed through the board positioning hole 411 of the control board 400, and the control board 400 is inserted into the lower die 700. Fixed to. Therefore, if a relative positional shift occurs between the board connection point 502 and the exposed base 571, an external force is applied to the exposed base 571 to move the exposed base 571 between the first partition wall surface 721 and the second partition wall surface 722. It is necessary to move it to the site.

As described above, the third extension part 513 is provided with the first stress relaxation part 540. The first stress relaxation section 540 is bendable in both the x direction and the y direction. For this purpose, the exposed base portion 571 is movable in the x direction and the y direction starting from the first stress relaxation portion 540 by external force.

As described above, the second stress relaxation section 550 is provided in the fourth extension section 521. The second stress relaxation section 550 is bendable in both the y direction and the z direction. Therefore, the exposed base portion 571 is movable in the y direction and the z direction starting from the second stress relaxation portion 550 by external force. Hereinafter, the first stress relaxation section 540 and the second stress relaxation section 550 will be collectively referred to as stress relaxation section 530.

As a result, the exposed base portion 571 is movable in the x direction, y direction, and z direction using the stress relaxation portion 530 as a starting point by external force. Therefore, it is possible to correct the exposed base portion 571 and move it to a portion between the first partition wall surface 721 and the second partition wall surface 722.

If a relative positional shift occurs between the board connection point 502 and the exposed base 571 as described above, by correcting the position of the exposed base 571, the exposed base 571 can be moved between the first partition wall surface 721 and the second partition wall surface 721. Insert into the area between.

In addition, there may be other cases in which a relative positional shift occurs between the board connection portion 502 and the fifth extension portion 522. In that case, it is necessary to apply external force to move the fifth extension portion 522 to a portion between the third partition wall surface 723 and the fourth partition wall surface 724.

The fifth extension part 522 is movable in each of the x direction and the y direction from the first stress relaxation part 540 as a starting point. Therefore, the fifth extension part 522 is movable in the x direction and the y direction using the first stress relaxation part 540 as a starting point by external force.

The fifth extension part 522 is movable in the y direction and the z direction, starting from the second stress relaxation part 550. Therefore, the fifth extension part 522 is movable in the y direction and the z direction using the second stress relaxation part 550 as a starting point by external force.

As a result, the fifth extension part 522 can be moved in the x direction, y direction, and z direction using the stress relaxation part 530 as a starting point by external force. It is possible to correct the fifth extension portion 522 and move it to a portion between the third partition wall surface 723 and the fourth partition wall surface 724.

If a relative positional shift occurs between the board connection point 502 and the fifth extension part 522 as described above, by correcting the position of the fifth extension part 522, the fifth extension part 522 can be moved to the third partition wall surface 722. and the fourth partition wall surface 724.

Although not shown, the sixth extension part 523 is also movable in the x direction, y direction, and z direction using the stress relaxation part 530 as a starting point by an external force. It is possible to correct a part of the fixing hole 720 and move it to a part between two partition wall surfaces different from the first partition wall surface 721 and the second partition wall surface 722 arranged in the x direction by correcting the sixth extension part 523. It is now possible.

If a relative positional shift occurs between the board connecting portion 502 and the sixth extension part 523 as described above, the position of the sixth extension part 523 is corrected by an external force. Specifically, the sixth extension part 523 is inserted into a site between two partition wall surfaces different from the first partition wall surface 721 and the second partition wall surface 722 that partition a part of the fixing hole 720 and are arranged in the x direction. do.

Although not shown, the motor connection section 560 is also movable in the x direction, y direction, and z direction, respectively, using the stress relaxation section 530 as a starting point by external force. By correcting the motor connection part 560, it is possible to partition a part of the fixing hole 720 and move it to a part where the motor connection part 560 is accommodated.

If a relative positional shift occurs between the board connection part 502 and the motor connection part 560 as described above, by correcting the position of the motor connection part 560, the motor connection part 560 and a part of the fixing hole 720 can be fixed. Insert the section into the section where the motor connection section 560 is to be accommodated.

To summarize the above, the exposed portion 570 is movable in the x direction, y direction, and z direction using the stress relaxation portion 530 as a starting point by external force. It is possible to correct the exposed portion 570 and move it to a location in the fixing hole 720 where the exposed portion 570 is accommodated.

Further, during mold clamping, the exposed base portion 571 is held between the first opposing surface 700a and the second opposing surface 900a by the mold. Misalignment in the z direction between the board connection portion 502 and the exposed base portion 571 is corrected.

In this way, the relative positional deviation between the board connection portion 502 and the exposed portion 570 can be corrected. According to the manufacturing process, with the relative positional deviation between the board connection part 502 and the exposed part 570 corrected, the part of the control board 400 and the connection terminal 500 that is closer to the board connection part 501 than the second stress relaxation part 550 can be inserted into the coating resin 800.

<Effect>
As described above, the third extension part 513 is provided with the first stress relaxation part 540 that is bendable in the x direction and the y direction. The fourth extension part 521 is provided with a second stress relaxation part 550 that can be bent in the y direction and the z direction.

For this reason, when an external force is applied to the exposed portion 570 in at least one of the x, y, and z directions, the stress relaxation portion 530 moves in at least one of the x, y, and z directions. It is curved.

This makes it difficult for an external force to be applied to a portion closer to the substrate connection portion 501 than the second stress relaxation portion 550. As a result, concentration of stress on the board connection portion 502 is easily suppressed.

As described above, the first stress relaxation section 540 is formed in the third extension section 513 extending in the x direction. Moreover, the first stress relaxation part 540 has a bellows shape that repeats mountain folds and valley folds in the y direction. Therefore, the first stress relaxation section 540 is easily curved in the x direction and the y direction.

As described above, the second stress relaxation section 550 is formed in the fourth extension section 521 extending in the y direction. Further, the second stress relaxation portion 550 has a bellows shape that repeats mountain folds and valley folds in the z direction. Therefore, the second stress relaxation section 550 is easily curved in the y direction and the z direction.

As described above, each of the first stress relaxation section 540 and the second stress relaxation section 550 is coated with the coating resin 800. Therefore, each of the first stress relaxation section 540 and the second stress relaxation section 550 is less likely to be damaged by external force.

After the board connecting part 501 and the control board 400 are mechanically and electrically connected using solder as described above, the board positioning hole 411 is passed through the positioning part 710. After passing the substrate positioning hole 411 through the positioning part 710, the exposed part 570 is inserted into the fixing hole 720.

For this reason, if a relative positional shift occurs between the board connection portion 502 and the exposed portion 570, it is necessary to apply an external force to move the exposed portion 570 to a position in the fixing hole 720 where the exposed portion 570 is accommodated.

As described above, the exposed portion 570 is movable in each of the x direction, y direction, and z direction starting from the stress relaxation portion 530. This makes it easier to suppress the external force required to move the exposed portion 570.

Accordingly, external force is less likely to be applied to a portion of the connection terminal 500 closer to the substrate connection portion 501 than the second stress relaxation portion 550. As a result, concentration of stress on the board connection portion 502 is easily suppressed.

Further, as described above, each of the first stress relaxation section 540 and the second stress relaxation section 550 has a bellows shape. Therefore, the exposed portion 570 is easily curved in the x direction, the y direction, and the z direction, starting from at least a portion of the first stress relaxation portion 540 and the second stress relaxation portion 550. This makes it easier to correct the relative positional deviation between the board connection portion 502 and the exposed portion 570.

As described above, in a state where the relative positional deviation between the board connection portion 502 and the exposed portion 570 is corrected, the control board 400 and the board connection portion 501 The side portion is inserted into the coating resin 800. Therefore, the controller 300 can be manufactured with high precision.

(First modification)
Note that the first stress relaxation part 540 does not need to be formed in the third extension part 513. The second stress relaxation part 550 may not be formed in the fourth extension part 521. If the extension direction of the part where the first stress relaxation part 540 is formed is different from the extension direction of the part where the second stress relaxation part 550 is formed, which part of the first conductive part 510 the first stress relaxation part 540 is formed is different from the extension direction of the part where the first stress relaxation part 540 is formed. may be formed. Similarly, if the extension direction of the part where the second stress relaxation part 550 is formed is different from the extension direction of the part where the first stress relaxation part 540 is formed, the second stress relaxation part 550 is different from the extension direction of the part where the first stress relaxation part 540 is formed. It may be formed at any location.

(Second modification)
The first conductive part 510 does not need to have all of the board connection part 501, the first extension part 511, the second extension part 512, and the third extension part 513. The first conductive part 510 only needs to have at least the substrate connection part 501 and the first extension part 511. In that case, the second extension part 512 and the third extension part 513 may be included in the second conductive part 520. The second conductive part 520 may include both the first stress relaxation part 540 and the second stress relaxation part 550. Depending on the components included in the first conductive section 510, components that are not included in the first conductive section 510 may be included in the second conductive section 520.

(Third modification)
The connection terminal 500 has a first corner part that connects a first extension part 511 and a second extension part 512. It has a second corner part that connects the second extension part 512 and the third extension part 513. The connection terminal 500 has a third corner portion that connects the third extension portion 513 and the fourth extension portion 521. The connection terminal 500 has a fourth corner portion that connects a fourth extension portion 521 and a fifth extension portion 522. The connection terminal 500 has a fifth corner portion that connects the fifth extension portion 522 and the sixth extension portion 523. The connection terminal 500 has a sixth corner portion that connects the sixth extension portion 523 and the motor connection portion 560. If the extension direction of the part where the first stress relaxation part 540 is formed is different from the extension direction of the part where the second stress relaxation part 550 is formed, and the exposed part 570 is movable in any direction, the first stress relaxation part At least one of the stress relieving portion 540 and the second stress relieving portion 550 may be formed at a corner portion.

(Fourth modification)
Connection terminal 500 does not need to have all the components described above. For example, as shown in FIG. 12, the connection terminal 500 includes a first conductive part 510 including a board connection part 501, a first extension part 511, and a fourth extension part 521, a first conductive part 510 including a fifth extension part 522, and a sixth extension part 523. It may have two conductive parts 520 and a motor connection part 560.

In that case, the first extension part 511 and the fourth extension part 521 are connected by the first corner part. The fourth extension part 521 and the fifth extension part 522 are connected by a fourth corner part. The fifth extension part 522 and the sixth extension part 523 are connected by a fifth corner part. The sixth extension part 523 and the motor connection part 560 are connected by a sixth corner part.

In this case, the first stress relaxation part 540 is provided in the fourth extension part 521 extending in the y direction, and the second stress relaxation part 550 is bent to connect the fifth extension part 522 and the sixth extension part 523. It may be provided at the extending fifth corner portion.

As a result, even if the part of the connection terminal 500 closer to the motor connection part 560 than the second stress relaxation part 550 moves in any direction due to a force applied from the outside, the stress applied to the board connection part 502 is relaxed by the stress relaxation part 530. It is becoming easier to

Note that if the extension direction of the part where the first stress relaxation part 540 is formed is different from the extension direction of the part where the second stress relaxation part 550 is formed, the first stress relaxation part 540 is the same as that of the first conductive part 510. It may be formed at any location. Similarly, if the extension direction of the part where the second stress relaxation part 550 is formed is different from the extension direction of the part where the first stress relaxation part 540 is formed, the second stress relaxation part 550 is different from the extension direction of the part where the first stress relaxation part 540 is formed. It may be formed at any location.

400... Control board, 500... Connection terminal, 501... Board connection part, 510... First conductive part, 520... Second conductive part, 540... First stress relaxation part, 550... Second stress relaxation part, 700... Lower mold , 710... Positioning part, 720... Fixing hole, 730... Cavity, 800... Coating resin

Claims (5)

A connected member (400);
a connection terminal (500) connected to the connected member,
The connection terminal includes a connection portion (501) connected to the connected member, a first conductive portion (510) connected to the connection portion and partially extending in a first direction, and connected to the first conductive portion. and a second conductive portion (520) that partially extends in a second direction different from the first direction,
A portion of the first conductive portion extending in the first direction includes a first stress relaxation portion (540) that relieves stress applied to a connection point between the connection portion and the connected member,
A portion of the second conductive portion extending in the second direction includes a second stress relaxation portion (550) that relieves stress applied to the first conductive portion ;
An electrical component further comprising a coating resin (800) that covers the first stress relaxation section, the second stress relaxation section, and the connected member . The electrical component according to claim 1, wherein at least a portion of the first stress relaxation section and the second stress relaxation section have a bellows shape that repeats mountain folds and valley folds. A connected member (400);
a connection terminal (500) connected to the connected member,
The connection terminal includes a connection portion (501) connected to the connected member, a first conductive portion (510) connected to the connection portion and partially extending in a first direction, and connected to the first conductive portion. and a second conductive portion (520) that partially extends in a second direction different from the first direction,
A portion of the first conductive portion extending in the first direction includes a first stress relaxation portion (540) that relieves stress applied to a connection point between the connection portion and the connected member,
A portion of the second conductive portion extending in the second direction includes a second stress relaxation portion (550) that relieves stress applied to the first conductive portion ;
A method for manufacturing an electrical component, further comprising a coating resin (800) that covers the first stress relaxation part, the second stress relaxation part, and the connected member ,
preparing a fixing part (700) including a first positioning part (710) that determines the position of the connected member and a second positioning part (720) that determines the position of the connection terminal;
After connecting the connecting part to the connected member, a part of the connected member is placed in the first positioning part, and a part of the connected member is placed on the side of the connecting terminal that is farther away from the connecting part than the second stress relaxation part. A method for manufacturing an electrical component, including arranging a portion in the second positioning portion. At least a part of the first stress relaxation part and the second stress relaxation part has a bellows shape that repeats mountain folds and valley folds,
Curving at least a portion of the first stress relaxation part and the second stress relaxation part to position a part of the connection terminal on a side farther away from the connection part than the second stress relaxation part. 4. The method for manufacturing an electrical component according to claim 3 , wherein the electrical component is disposed in a section. In addition to the first positioning part and the second positioning part, the fixing part is provided with the connected member and at least a part of the first stress relaxation part and the second stress relaxation part. , a cavity (730) filled with the molten coating resin,
After arranging a part of the connected member in the first positioning part and arranging the connection terminal in the second positioning part, the cavity is filled with the molten coating resin, and the coating resin is solidified. 4. The method for manufacturing an electrical component according to 3 or 4 .

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