Circuit connection device, rotating electrical machine device, and method of manufacturing circuit connection device

Abstract

This circuit connection device (2) comprises a connector (17) having: a housing (16) in which connection terminals (29, 30) are housed; a positioning guide portion (32) provided on a side different from the opening portion of the housing (16); and a press-fit terminal (25) extended from the connection terminals (29, 30). The circuit connection device (2) further comprises a heat sink (10) to which the housing (16) is fixed and which has: a guide receiving portion (36) fitted into the positioning guide portion (32); and an opening (35) through which the press-fit terminal (25) passes. The circuit connection device (2) still further comprises a circuit substrate (11) fixed to the heat sink (10) and having a substrate positioning guide portion (28) and a through-hole (26) in which the press-fit terminal (25) is crimped. The press-fit terminal (25) and the through-hole (26) can be positioned to each other with high accuracy, so that it is possible to improve reliability and suppress the increase of production cost by a simple assembly process.

Description

[Technical field]

[0001] The present application relates to a circuit connection device, a rotating electrical machine device, and a method for manufacturing a circuit connection device. [Background technology]

[0002] There is a circuit connection device that connects to a through hole of a circuit board at a predetermined distance from a housing of a connector for external connection. Here, the circuit connection device is a device in which a circuit board on which electronic components are mounted and a terminal of a connector for external connection is extended and connected to a through hole of the circuit board. For example, a circuit connection device is used in a control unit of a rotating electric machine. The circuit board of the control unit of the rotating electric machine is equipped with heat-generating components such as an inverter that controls the rotating electric machine, a switching element used in a power supply circuit, a shunt resistor, a microcomputer, and an IC. For this reason, the circuit board is often cooled by being in close contact with a heat sink, and a connector for external connection is connected to the circuit board with the heat sink sandwiched between them. In such a case, the terminal of the connector is connected to the through hole of the circuit board with a predetermined space between the housing of the connector and the heat sink.

[0003] Press-fit terminals are sometimes used to connect a connector to a through-hole in a circuit board. A press-fit terminal is a terminal that enables electrical connection by being inserted into a through-hole in a circuit board. By using a press-fit terminal, it is possible to ensure electrical connection between the circuit board and the connector terminal without soldering. Therefore, by using a press-fit terminal, it is possible to facilitate the manufacture of a circuit connection device and shorten the manufacturing time. This makes it possible to reduce the cost of the circuit connection device.

[0004] A circuit connection device has been proposed in which a press-fit terminal is connected to a through-hole in a circuit board at a specified distance from the housing of a connector for external connection. By leaving a specified distance from the connector housing, the distance to the tip of the press-fit terminal becomes large, which causes a problem that it becomes difficult to insert the press-fit terminal into the through-hole in the circuit board.

[0005] A technology has been disclosed in which a terminal alignment member is provided on a circuit board to facilitate insertion of press-fit terminals into the through-holes of a circuit board even when the distance from the connector housing to the through-holes of the circuit board is large (for example, Patent Document 1). The terminal alignment member has through holes that match the through-holes of the circuit board and is provided with guide holes that communicate with the through holes and widen as they reach the outer surface. The guide holes adjust the position of the press-fit terminals of the connector, making it easier to insert them into the through-holes. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2005-302614 A Summary of the Invention [Problem to be solved by the invention]

[0007] In the technology disclosed in Patent Document 1, it is necessary to additionally arrange a terminal alignment member on the circuit board. This increases the number of parts of the circuit connection device, and increases the product cost. In addition, a process of assembling the terminal alignment member on the circuit board is required, which increases the number of processes, increases the manufacturing cost, and further increases the product cost. In addition, if the relative position between the connector and the circuit board is significantly deviated from the reference dimension, the tip of the press-fit terminal may collide with the guide hole of the terminal alignment member or the periphery of the guide hole at an obtuse angle, which may adversely affect the quality, such as buckling the terminal.

[0008] The circuit connection device according to the present application is a technology for solving the problems of the conventional devices as described above. The object of the present application is to obtain a circuit connection device that connects a through hole of a circuit board at a predetermined distance from a housing of a connector equipped with a press-fit terminal, in which the press-fit terminal and the through hole of the circuit board are positioned with high accuracy, reliability is improved, and a terminal alignment member is not required, and an assembly process is simple, thereby suppressing an increase in product costs. Another object of the present application is to obtain a rotating electric machine equipped with such a circuit connection device. Another object of the present application is to obtain a manufacturing method for manufacturing the circuit connection device by positioning the press-fit terminal and the through hole of the circuit board with high accuracy, reliability is improved, and a terminal alignment member is not required, and an assembly process is simple, thereby suppressing an increase in costs. [Means for solving the problem]

[0009] The circuit connection device according to the present application is a connector including a housing in which a connection terminal is accommodated inside a container having an opening, a positioning guide portion provided on a side of the housing different from the opening, and a press-fit terminal extending from the connection terminal; a heat sink having a housing fixed thereto, the heat sink having a guide receiving portion fitted to the positioning guide portion and an opening through which the press-fit terminal passes; A circuit connection device including a circuit board having a board positioning guide and a through hole to which a press-fit terminal is crimped, the circuit board being fixed to a surface of a heat sink opposite to a surface to which a housing is fixed. And, The connector has a positioning guide portion that is a protrusion, and the press-fit terminal extends parallel to the protrusion, The heat sink has a through hole as a guide receiving portion, The circuit board has a board through hole in which the board positioning guide portion is concentric with the through hole, The diameter of the through hole of the circuit board is larger than the diameter of the through hole of the heat sink, The length from the tip of the protrusion to the surface of the heat sink to which the housing is fixed is longer than the length from the tip of the press-fit terminal to the surface of the circuit board to which the heat sink is fixed, The heat sink has a stepped hole with a diameter larger than that of the through hole on the side of the surface to which the housing is fixed. It is something. In addition, the circuit connection device according to the present application is a connector including a housing in which a connection terminal is accommodated inside a container having an opening, a positioning guide portion provided on a side of the housing different from the opening, and a press-fit terminal extending from the connection terminal; a heat sink having a housing fixed thereto, the heat sink having a guide receiving portion fitted to the positioning guide portion and an opening through which the press-fit terminal passes; A circuit connection device including a circuit board having a board positioning guide portion and a through hole to which a press-fit terminal is crimped, the circuit board being fixed to a surface of a heat sink opposite to a surface to which a housing is fixed, The connector has a positioning guide portion that is a protrusion, and the press-fit terminal extends parallel to the protrusion, The heat sink has a through hole as a guide receiving portion, The circuit board has a board through hole in which the board positioning guide portion is concentric with the through hole, The diameter of the through hole of the circuit board is larger than the diameter of the through hole of the heat sink, The length from the tip of the protrusion to the surface of the heat sink to which the housing is fixed is longer than the length from the tip of the press-fit terminal to the surface of the circuit board to which the heat sink is fixed, The heat sink has a stepped hole with a diameter larger than that of the through hole on the surface opposite to the surface to which the housing is fixed. In addition, the circuit connection device according to the present application is a connector including a housing in which a connection terminal is accommodated inside a container having an opening, a positioning guide portion provided on a side of the housing different from the opening, and a press-fit terminal extending from the connection terminal; a heat sink having a housing fixed thereto, the heat sink having a guide receiving portion fitted to the positioning guide portion and an opening through which the press-fit terminal passes; A circuit connection device including a circuit board having a board positioning guide portion and a through hole to which a press-fit terminal is crimped, the circuit board being fixed to a surface of a heat sink opposite to a surface to which a housing is fixed, The connector has a first positioning protrusion having a cylindrical columnar portion and four ribs parallel to the axis of the columnar portion, and a second positioning protrusion having a columnar portion and two ribs parallel to the axis of the columnar portion.

[0010] The rotating electrical machine according to the present application includes the above-described circuit connection device.

[0011] The method for manufacturing a circuit connection device according to the present application includes: A first step is to fix a circuit board having a through hole for inserting a press-fit terminal and a through hole for positioning the board to a front surface of a heat sink having a through hole concentric with the through hole for positioning the board and having an inner diameter smaller than the inner diameter of the through hole for positioning the board, and an opening through which the press-fit terminal passes; a second step of fixing a connector having a housing in which a connection terminal is accommodated inside a container having an opening, a positioning protrusion extending from the housing to a side opposite the opening, and a press-fit terminal extending from the connection terminal in parallel with the positioning protrusion, the positioning protrusion being fitted into the through hole and the press-fit terminal being crimped into the through hole, to a rear surface of a heat sink; And, In a first step, the position of the circuit board is adjusted using a board assembly jig having a jig positioning protrusion that is inserted into a board positioning through hole of the circuit board from the side of the circuit board, and the position of the heat sink is adjusted using a guide jig having a guide protrusion that is inserted into the through hole from the back side of the heat sink; The jig positioning protrusion is tapered at the tip and middle, and the positions of the board assembly jig and the heat sink are adjusted by the taper at the tip and the edge of the recess provided in the guide protrusion, and the positions of the board assembly jig and the circuit board are adjusted by the taper at the middle and the edge of the board positioning through hole provided in the circuit board. It is something. In addition, a method for manufacturing a circuit connection device according to the present application includes the steps of: A first step is to fix a circuit board having a through hole for inserting a press-fit terminal and a through hole for positioning the board to a front surface of a heat sink having a through hole concentric with the through hole for positioning the board and having an inner diameter smaller than the inner diameter of the through hole for positioning the board, and an opening through which the press-fit terminal passes; a second step of fixing a connector having a housing in which a connection terminal is accommodated inside a container having an opening, a positioning protrusion extending from the housing to a side opposite the opening, and a press-fit terminal extending from the connection terminal in parallel with the positioning protrusion, the positioning protrusion being fitted into a through hole and the press-fit terminal being crimped into a through hole, the second step comprising: In a first step, the positions of the circuit board and the heat sink are adjusted using a board assembly jig having a jig positioning protrusion portion including a cylindrical movable protrusion and a fixed protrusion passing through the cylindrical interior of the movable protrusion, the jig being inserted into the board positioning through hole from the circuit board side; The jig positioning protrusion has a taper at the tip of the fixed protrusion, which is the overall tip, and at the tip of the movable protrusion, which is the overall middle part, and the positions of the board assembly jig and the heat sink are adjusted by the taper of the overall tip and the edge of the through hole, and the positions of the board assembly jig and the circuit board are adjusted by the taper of the overall middle part and the edge of the board positioning through hole. Effect of the Invention

[0012] According to the circuit connection device of the present application, the press-fit terminals and the through-holes of the circuit board can be positioned with high precision, improving reliability, and preventing increases in product costs through a simple assembly process without the need for a terminal alignment member.

[0013] Furthermore, the rotating electrical equipment according to the present application can be provided with a circuit connection device that positions the press-fit terminals and the through-holes of the circuit board with high precision, improves reliability, and does not require a terminal alignment member, thereby suppressing increases in product costs through a simple assembly process, thereby improving the reliability of the rotating electrical equipment and suppressing increases in costs.

[0014] Furthermore, according to the manufacturing method of the circuit connection device of the present application, the press-fit terminals and the through-holes of the circuit board can be positioned with high precision without the need for a terminal alignment member, thereby improving reliability and suppressing cost increases through a simple assembly process. [Brief description of the drawings]

[0015] [Figure 1] 1 is a cross-sectional view of a rotating electric machine device according to a first embodiment. [Diagram 2] 1 is a perspective view of a circuit connection device according to a first embodiment. [Diagram 3] 2 is a perspective view of a circuit board of the circuit connection device according to the first embodiment. FIG. [Figure 4] 1 is a perspective view of a connector of a circuit connection device according to a first embodiment, as viewed from the heat sink mounting surface side. [Diagram 5] 1 is a perspective view of a connector of a circuit connection device according to a first embodiment, as viewed from the connector insertion / removal side. [Figure 6] 2 is a perspective view of a heat sink of the circuit connection device according to the first embodiment. FIG. [Figure 7] 3 is a perspective view of a board assembly jig for the circuit connection device according to the first embodiment. FIG. [Figure 8] 3 is a first assembly diagram of the circuit connection device according to the first embodiment. FIG. [Figure 9]4 is a second assembly diagram of the circuit connection device according to the first embodiment. FIG. [Figure 10] 11 is a third assembly diagram of the circuit connection device according to the first embodiment. FIG. [Figure 11] 13 is a fourth assembly diagram of the circuit connection device according to the first embodiment. FIG. [Figure 12] 13 is a fifth assembly diagram of the circuit connection device according to the first embodiment. FIG. [Figure 13] 3 is a cross-sectional view of the circuit connection device according to the first embodiment when it is attached to a circuit board. FIG. [Figure 14] FIG. 11 is a perspective view of a guide jig for a circuit connection device according to the second embodiment. [Figure 15] 11 is a cross-sectional view of a circuit connection device according to a second embodiment, illustrating how the device is attached to a circuit board. FIG. [Figure 16] 11 is a cross-sectional view of a circuit connection device according to a third embodiment, illustrating how the device is attached to a circuit board. FIG. [Figure 17] 13 is a perspective view of a connector of a circuit connection device according to embodiment 4, as viewed from the heat sink mounting surface side. FIG. [Figure 18] 13 is a front view of a connector of a circuit connection device according to embodiment 4, as viewed from the heat sink mounting surface side. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] 1. First embodiment <Rotating electrical equipment> Hereinafter, a circuit connection device 2 and a rotating electric machine device 100 according to a first embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a cross-sectional view showing a configuration of the rotating electric machine device 100. Fig. 1 shows a cross section along a rotation axis 4 of a rotor 5 of a rotating electric machine 1 provided in the rotating electric machine device 100.

[0017] The rotating electric machine device 100 includes a multi-phase winding type rotating electric machine 1 and a circuit connection device 2. The circuit connection device 2 is a device in which a circuit board 11 on which electronic components are mounted and a terminal extends from a housing of a connector 17 for external connection and is connected to a through hole of the circuit board 11 at a predetermined distance. In this embodiment, the circuit connection device 2 is a control unit that controls the current flowing through the armature winding 7 of the stator 6 of the rotating electric machine 1. The circuit connection device 2 includes a heat sink 10 between the connector 17 and the circuit board 11.

[0018] <Rotary Electric Machines> The configuration of the rotating electric machine 1 will be described. The rotating electric machine 1 includes a rotating shaft 4 built into a cylindrical case 3, a rotor 5 fixed to the rotating shaft 4, and a stator 6 having an inner circumferential surface that faces the outer circumferential surface of the rotor 5 via an air gap. The stator 6 has an armature winding 7 wound thereon, and is press-fitted and fixed to the inner surface of the case 3. In Fig. 1, the output side of the rotating shaft 4 is shown on the lower side, and the non-output side is shown on the upper side.

[0019] An annular wiring portion 8 is disposed on the non-output side of the armature winding 7. The annular wiring portion 8 is connected to an end of the armature winding 7 by TIG welding or the like. A wiring connection terminal 9 extends from the annular wiring portion 8 to the non-output side of the rotating shaft 4 of the rotating electric machine, penetrating a heat sink 10. The wiring connection terminal 9 is electrically connected to a winding end of the armature winding 7 via the annular wiring portion 8.

[0020] The wiring connection terminal 9 is composed of three conductors respectively connected to the wiring connection terminal of the U-phase winding, the wiring connection terminal of the V-phase winding, and the wiring connection terminal of the W-phase winding of the armature winding 7. The wiring connection terminals 9 of each phase extend into the circuit connection device 2 and are connected to the circuit board 11 by soldering or the like.

[0021] The rotor 5 has a plurality of pairs of permanent magnets (not shown) that form field poles arranged on its circumferential surface. A first bearing 12a and a second bearing 12b that rotatably support the rotating shaft 4 are arranged on the non-output side and the output side of the rotating shaft 4 with respect to the rotor 5, respectively. The first bearing 12a is arranged on the rotating shaft part of the heat sink 10. The heat sink 10 serves as a lid that closes the inside of the rotating electric machine device 100. Meanwhile, the second bearing 12b is fixed to a structure 13 on the output side of the rotating electric machine device 100. In addition, a sensor rotor 14 is fixed to the end of the rotating shaft 4 on the opposite output side. The sensor rotor 14 has one or more pairs of permanent magnets.

[0022] <Circuit connection device> Next, the configuration of the circuit connection device 2 will be described. Fig. 2 is a perspective view of the circuit connection device 2 according to the first embodiment. The outer layer of the circuit connection device 2 is covered with a cover 15 (Fig. 2 shows a state in which the cover 15 is removed). The circuit connection device 2 is composed of a heat sink 10, connectors 17 attached to both sides of the heat sink 10, and a circuit board 11. The connector 17 is attached to a connector attachment surface 10a of the heat sink 10. The circuit board 11 is attached to a circuit board attachment surface 10b of the heat sink 10. Note that, although Fig. 2 shows an example in which the connector insert / remove side surface 17b of the connector 17 faces the output side, it is also possible to configure the connector insert / remove side surface 17b to face the anti-output side.

[0023] <Circuit board> 3 is a perspective view of the circuit board 11 of the circuit connection device 2 according to the first embodiment, as viewed from the board heat sink mounting surface 11a. The circuit board 11 is also called a printed wiring board. A rotation sensor 20 is arranged on the circuit board 11 coaxially with the sensor rotor 14 via a gap. The rotation sensor 20 detects changes in the magnetic field from the permanent magnet of the sensor rotor 14, which rotates together with the rotation of the rotating shaft 4, and converts the changes into an electric signal. Note that although the rotation sensor 20 has been described as being a magnetic sensor, a resolver, a hall sensor, an optical sensor, or the like may also be used.

[0024] In addition to the rotation sensor 20, heat-generating electronic components such as a microcomputer 21, a switching element 22, and a shunt resistor 23 are mounted on the circuit board 11. These are collectively referred to as heat-generating components 18. Large electronic components such as a smoothing capacitor 24 are also mounted on the circuit board 11. Furthermore, the circuit board 11 is provided with a terminal connection section 27 in which through holes 26 for inserting press-fit terminals 25 of the connector 17 are arranged. The circuit board 11 is also provided with board positioning through holes 28 on either side of the terminal connection section 27.

[0025] <Connector> FIG. 4 is a perspective view of the connector 17 of the circuit connection device 2 according to the first embodiment, seen from the side of the heat sink mounting surface 17a. FIG. 5 is a perspective view of the connector 17 of the circuit connection device 2 according to the first embodiment, seen from the connector insertion side surface 17b. The connector 17 includes a power supply side housing 16a that accommodates a power supply terminal 29 that connects to an external power supply (battery) and a signal side housing 16b that accommodates a signal terminal 30 that connects to sensors. The power supply side housing 16a and the signal side housing 16b are collectively referred to as the housing 16. The housing 16 is a container shape with an opening, and accommodates a connection terminal. Here, an example in which the housing 16 is divided into two parts is shown, but the housing 16 may be a single container shape as a whole. It may also be divided into three or more container shapes. The connection terminals may all be terminals of the same shape, or may be divided into terminals of three or more different shapes.

[0026] The ends of the power terminals 29 and the signal terminals 30 that extend from the housing 16 and connect to the circuit board 11 are press-fit terminals 25. In this example, the press-fit terminals 25 extend on the opposite side to the power terminals 29 and the signal terminals 30 that are arranged on the opening side of the housing 16. However, the press-fit terminals 25 may extend in a direction different from the opening, such as a direction perpendicular to the opening of the housing 16.

[0027] The press-fit terminal 25 extending from the heat sink mounting surface 17a of the connector 17 is connected to the through hole 26 of the circuit board 11. The press-fit terminal 25 is a terminal that can be electrically connected by being inserted into the through hole 26 of the circuit board 11. By using the press-fit terminal 25, it is possible to ensure an electrical connection between the circuit board 11 and the terminal of the connector 17 without soldering. Therefore, by using the press-fit terminal 25, it is possible to easily manufacture the circuit connection device 2 and shorten the manufacturing time. This allows the cost of the circuit connection device 2 to be reduced. The connector 17 is provided with a cylindrical positioning protrusion 32 for determining the position with respect to the heat sink 10. The positioning protrusion 32 extends parallel to the press-fit terminal 25. The positioning protrusions 32 are provided on both sides of the press-fit terminal 25. Therefore, the positioning protrusions 32 allow accurate position adjustment of the press-fit terminal 25.

[0028] Now consider a state in which connector 17 is attached to heat sink 10 combined with circuit board 11. In this case, the length of positioning protrusion 32 is set so that the length from the tip of positioning protrusion 32 to connector mounting surface 10a of heat sink 10 is longer than the length from the tip of press-fit terminal 25 to board heat sink mounting surface 11a of circuit board 11.

[0029] With this setting, when the connector 17 is attached to the heat sink 10 to which the circuit board 11 is assembled, the positioning protrusions 32 of the connector 17 start to be inserted into the through holes 36 of the heat sink 10, and then the press-fit terminals 25 start to be inserted into the through holes 26 of the circuit board 11. Before the press-fit terminals 25 are inserted into the through holes 36 of the heat sink 10, the positioning protrusions 32 of the connector 17 are inserted into the through holes 36 of the heat sink 10 and accurately positioned. As a result, the press-fit terminals 25 can be smoothly inserted into the through holes 26 of the circuit board 11. Since the positional relationship between the connector 17 and the circuit board 11 can be accurately set, problems that adversely affect quality, such as the tip of the press-fit terminal 25 colliding with the periphery of the through holes 26 of the circuit board 11 and the press-fit terminal 25 buckling, can be prevented.

[0030] <Heat sink> 6 is a perspective view of the circuit connection device 2 according to the first embodiment, seen from the circuit board mounting surface 10b of the heat sink 10. Thermal grease 34 is applied to the heat dissipation portion 33 provided on the circuit board mounting surface 10b of the heat sink 10. This allows the heat generating components 18 that require heat dissipation, such as the switching elements 22 and shunt resistors 23 mounted on the circuit board 11, to dissipate heat to the heat sink 10 via the thermal grease 34.

[0031] Furthermore, a large component housing portion 38 is provided on the circuit board mounting surface 10b of the heat sink 10 to prevent interference with large electronic components such as the smoothing capacitor 24. The rotating shaft through hole 19 is a through hole through which the rotation sensor 20 detects the rotation state of the rotating shaft 4 by means of the sensor rotor 14 attached to the non-output side end of the rotating shaft.

[0032] 5 shows an example in which electronic components that require heat dissipation are arranged on the output side surface of the rotating shaft of the circuit board 11, but the electronic components may be arranged on the opposite side surface of the rotating shaft of the circuit board 11. Also, thermal grease 34 may be filled between the circuit board 11 and the heat sink 10 in an area other than where the heat-generating components 18 are present.

[0033] The heat sink 10 is provided with an opening 35 to prevent interference when the press-fit terminal 25 of the connector 17 is inserted into the through hole 26 of the circuit board 11. Also, a through hole 36 that fits with the positioning protrusion 32 of the connector 17 is provided.

[0034] The board positioning through hole 28 of the circuit board 11, the positioning protrusion 32 of the connector 17, and the through hole 36 of the heat sink 10 are arranged coaxially. The diameter of the through hole 36 of the heat sink 10 is set to be smaller than the diameter of the board positioning through hole 28 of the circuit board 11 and slightly larger than the diameter of the positioning protrusion 32 of the connector.

[0035] As described above, by setting the through hole 36 of the heat sink 10, the board positioning through hole 28 of the circuit board 11, and the positioning protrusion 32 of the connector 17, the ease of assembly of the circuit connection device 2 is improved. After adjusting the relative positions of the heat sink 10 and the circuit board 11 and accurately assembling them, the positioning protrusion 32 of the connector 17 can be fitted into the through hole 36 of the heat sink 10 to attach the connector 17. Since the relative positions of each are accurately adjusted, it becomes possible to easily and accurately press-fit the press-fit terminal 25 of the connector 17 into the through hole 26 of the circuit board 11.

[0036] In the above description, an example was described in which the positioning protrusion 32, the through hole 36, and the board positioning through hole 28 are provided to adjust the positional relationship between the connector 17, the heat sink 10, and the circuit board 11. However, the positioning protrusion 32 of the connector 17 can be a positioning recess 332 if it functions as a positioning guide. In that case, instead of the through hole 36, a connector positioning protrusion 336 may be provided to function as a guide receiving portion of the heat sink 10, and the connector positioning protrusion 336 may be fitted into the positioning recess 332 of the connector 17 to adjust the position accurately. Also, in order to function as a board positioning guide portion of the circuit board 11, the board positioning through hole 28 may be used as it is, and a board positioning protrusion 337 may be provided on the heat sink 10 so that the position can be adjusted by fitting it. (The positioning recess 332, the connector positioning protrusion 336, and the board positioning protrusion 337 are not shown.)

[0037] Even when such a configuration is adopted, the relative positions of the heat sink 10 and the circuit board 11 can be adjusted and assembled accurately by fitting the board positioning protrusions 337 and the board positioning through holes 28 together, and then the connector 17 can be attached accurately by fitting the positioning recesses 332 of the connector 17 into the connector positioning protrusions 336 of the heat sink 10. This makes it possible to press-fit the press-fit terminals 25 of the connector 17 into the through holes 26 of the circuit board 11 easily and accurately.

[0038] <Board assembly jig> Next, a description will be given of the procedure for assembling the circuit connection device 2. Fig. 7 is a perspective view of the board assembly jig 37 of the circuit connection device 2 according to embodiment 1. A board assembly surface 37a of the board assembly jig 37 is provided with a jig positioning protrusion 39 for determining a position relative to the heat sink 10, and a pressure protrusion 40 made of a soft elastic material for applying pressure to the circuit board 11 and spreading out the thermal grease 34 applied to the heat sink 10.

[0039] The jig positioning protrusion 39 of the substrate assembly jig 37 is provided with a first columnar portion 41, a second columnar portion 42, an intermediate tapered portion 43, and a tip tapered portion 44. The diameter of the first columnar portion 41 is set to be smaller than the diameter of the second columnar portion 42 and slightly smaller than the diameter of the through hole 36 provided in the heat sink 10.

[0040] The diameter of the second columnar section 42 is set slightly larger than the diameter of the board positioning through hole 28 provided in the circuit board 11. In addition, the angle of the intermediate tapered section 43 with respect to the cylindrical sections of the first columnar section 41 and the second columnar section 42 is set in the range of 1° to 60°.

[0041] It is desirable that the pressure projections 40 are disposed around the heat generating components 18 that require heat dissipation. This is to spread the heat dissipation grease 34. In addition, a floating mechanism is provided between the board assembly jig 37 and the equipment so that the board assembly jig 37 can move freely in a direction parallel to the board assembly surface 37a (not shown). In addition to the board assembly jig 37, a jig for fixing the heat sink 10 is provided directly below the heat sink 10 (not shown).

[0042] <Assembly Procedure> 8 to 12 are first to fifth assembly diagrams of the circuit connection device 2 according to the first embodiment. Fig. 8 is the first assembly diagram. In Fig. 8, the board assembly jig 37 is set upside down compared to Fig. 7, with the board assembly surface 37a facing downward. The circuit board 11 is attached to the board assembly jig 37 from below, with the board non-heat sink mounting surface 11b facing upward. The diagram shows the state before the first columnar portion 41 of the board assembly jig 37 is inserted into the board positioning through hole 28 of the circuit board 11.

[0043] Fig. 9 is a second assembly diagram. Fig. 9 shows a state in which the circuit board 11 is attached to the circuit board attachment surface 10b of the heat sink 10 while being set in the board assembly jig 37. The circuit board attachment surface 10b of the heat sink 10 is referred to as the front side. The first columnar portion 41 of the board assembly jig 37 is inserted into the through hole 36 of the heat sink 10. At this time, a gap is generated between the first columnar portion 41 and the through hole 36.

[0044] FIG. 10 is a third assembly diagram. In FIG. 10, a load is applied vertically to the non-board mounting surface 37b, which is the back side of the board mounting surface 37a of the board mounting jig 37 (in the direction of the arrow in FIG. 10). The circuit board 11 is pressed against the heat sink 10 and fixed by tightening the screws. Although not shown in FIG. 7 to FIG. 10, the board mounting jig 37 is provided with through holes for tightening the screws in order to tighten the screws while accurately adjusting the positions of the circuit board 11 and the heat sink 10. In addition, the circuit board 11 and the heat sink 10 may be fixed by other fixing methods such as fixing with an adhesive, fixing with welding, fixing with brazing, fixing with soldering, and crimping, in addition to screwing. FIG. 13 shows a cross-sectional view of the circuit board 11 and the heat sink 10 in a screwed state, cut along the dashed line indicated by XIII-XIII in FIG. 10.

[0045] Fig. 11 is a fourth assembly diagram. In Fig. 11, the circuit board 11 and heat sink 10 fixed with screws are removed from the board assembly jig 37 and turned upside down, and the connector mounting surface 10a of the heat sink 10 is placed upside down. The connector mounting surface 10a of the heat sink 10 is called the back side. The positioning protrusion 32 of the connector 17 is inserted into the through hole 36 of the heat sink 10.

[0046] Fig. 12 is a fifth assembly diagram. In Fig. 12, connector 17 is pressed into heat sink 10, and a load is applied vertically to connector inserting / removing side surface 17b, which is the back surface of heat sink mounting surface 17a of connector 17 (in the direction of the arrow in Fig. 12). Press-fit terminal 25 is pressed into through hole 26 and fixed.

[0047] Here, if necessary, pressure may be applied from the tip of press-fit terminal 25 to apply pressure in the axial direction. This is because some press-fit terminals 25 are products whose diameter expands when pressure is applied in the axial direction and are crimped into through-hole 26. In the case of products that maintain electrical contact simply by being inserted into through-hole 26, the step of applying pressure from the tip to apply pressure in the axial direction can be omitted.

[0048] 13 is a cross-sectional view of the circuit board assembly of the circuit connection device 2 according to the first embodiment. A cross-sectional view of the board assembly jig 37, the circuit board 11, and the heat sink 10 shown in FIG. 10, cut along the cross section indicated by the dashed line indicated by XIII-XIII. A load is applied to the circuit board 11 by the board assembly jig 37 (indicated by an arrow in FIG. 13). The intermediate tapered portion 43 of the jig positioning protrusion 39 is pressed against the edge of the board positioning through hole 28 of the circuit board 11. Then, the position of the circuit board 11 is moved and adjusted in the horizontal direction so that the centers of the board positioning through hole 28 and the intermediate tapered portion 43 of the jig positioning protrusion 39 coincide with each other. At this time, the heat dissipation grease 34 applied to the heat sink 10 is spread by the pressure protrusion 40.

[0049] The horizontal position of the heat sink 10 relative to the jig positioning protrusion 39 is adjusted by inserting the first columnar portion 41 of the jig positioning protrusion 39 having the tip tapered portion 44 into the through hole 36 of the heat sink 10. Then, the horizontal position of the circuit board 11 relative to the jig positioning protrusion 39 is accurately adjusted by inserting the intermediate tapered portion 43 of the board assembly jig 37 into the board positioning through hole 28 of the circuit board 11.

[0050] As a result, the horizontal positions of heat sink 10 and circuit board 11 are adjusted with high precision. This ensures that when connector 17 is attached to heat sink 10 in a later process, the positions of press-fit terminals 25 of connector 17 and through-holes 26 of circuit board 11 match accurately, allowing press-fit terminals 25 to be smoothly inserted into through-holes 26.

[0051] In the connector assembly process, positioning protrusions 32 of connector 17 are inserted into through holes 36 of heat sink 10. This adjusts the positions of connector 17 and heat sink 10. Then, connector 17 is moved in the direction in which heat sink mounting surface 17a of connector 17 and connector mounting surface 10a of heat sink 10 come into contact, and press-fit terminals 25 are inserted into through holes 26.

[0052] <Effects> The effects obtained by the device configured as above will be described. In the rotating electrical device 100, if the connector 17 is assembled with the press-fit terminals 25 and through-holes 26 misaligned, there is a risk of improper insertion due to buckling of the terminals and damage to the through-holes 26. In such a case, there is a risk of a decrease in the electrical insulation of the circuit board 11, causing a short circuit between the wiring pattern and the terminals.

[0053] In the circuit connection device 2 according to the first embodiment, an opening 35 is provided in the heat sink 10 to prevent interference between the press-fit terminals 25 and the heat sink 10, and it becomes possible to accurately position the circuit board 11 and the connector 17 via the heat sink 10. The board positioning through hole 28 of the circuit board 11, the positioning protrusion 32 of the connector 17, and the through hole 36 of the heat sink 10 are coaxially arranged. This makes it possible to reduce positional variations during assembly by positioning the circuit board 11 and the connector 17 using the through hole 36 provided in the heat sink 10, and it is possible to position the centers of the press-fit terminals 25 and the through holes 26 with high precision.

[0054] Moreover, the positioning protrusions 32 are provided on both sides of the press-fit terminal 25. Therefore, the positioning protrusions 32 make it possible to adjust the positions of the press-fit terminal 25 and the center of the through-hole 26 with high precision.

[0055] Heat generating components 18, such as switching elements, shunt resistors, microcomputers, and ICs, used in inverters and power circuits for controlling the rotating electric machine 1, are mounted on the circuit board 11 of the circuit connection device 2 of the rotating electric machine device 100. For this reason, the circuit board 11 is often cooled by closely contacting a heat sink 10, and a connector 17 for external connection is connected to the circuit board 11 with the heat sink 10 sandwiched therebetween. In such a case, the heat sink 10 located between the housing 16 of the connector 17 and the circuit board 11 is used to accurately adjust the positions of the connector 17 and the circuit board 11, thereby making it possible to provide the circuit connection device 2 through a simple assembly process without requiring a terminal alignment member. Such advantages are not limited to the rotating electric machine device 100, but can be applied to the circuit connection device 2 in many application fields, such as inverter devices, DC-DC converter devices, and microcomputer application control devices, which use the circuit connection device 2 that utilizes a heat sink.

[0056] Here, the diameter of the board positioning through hole 28 of the circuit board 11 is made larger than the diameter of the through hole 36 of the heat sink 10. Therefore, by applying a load to the board assembly jig 37 and pressing the intermediate tapered portion 43 of the jig positioning protrusion 39 against the edge of the board positioning through hole 28 of the circuit board 11, the horizontal position of the circuit board 11 can be adjusted so that their centers are aligned. This makes it possible to assemble the circuit board 11 to the heat sink 10 with high precision.

[0057] In addition, the length of the positioning protrusion 32 is set so that the length from the tip of the positioning protrusion 32 of the connector 17 to the connector mounting surface 10a of the heat sink 10 is longer than the length from the tip of the press-fit terminal 25 to the board-heatsink mounting surface 11a of the circuit board 11. This allows the positioning protrusion 32 of the connector 17 to be inserted into the through hole 36 of the heat sink 10, and the press-fit terminal 25 to be inserted into the through hole 26 after the position is regulated. As a result, the press-fit terminal 25 can be reliably inserted into the through hole 26.

[0058] Furthermore, when a load is applied to the board assembly jig 37, the heat dissipation grease 34 can be spread by the pressure projections 40, simplifying the assembly process and reducing product costs. Also, high-precision positioning can be achieved with a simple structure that saves space without increasing the number of parts, reducing manufacturing costs.

[0059] In this way, in the circuit connection device 2 having the connector 17 with the press-fit terminals 25, the press-fit terminals 25 can be positioned in the through-holes 26 with high accuracy, reliability can be improved, and the circuit connection device 2 can be manufactured through a simple assembly process, making it possible to reduce product costs. It is also possible to provide a method for manufacturing the circuit connection device 2 in which the press-fit terminals 25 are positioned in the through-holes 26 with high accuracy, reliability can be improved, and manufacturing costs can be reduced through a simple assembly process.

[0060] In the case of a rotating electrical machine 100 including such a circuit connection device 2, it is possible to provide a rotating electrical machine 100 that similarly has improved reliability and a simple structure, thereby reducing production costs.

[0061] 2. Second embodiment A second embodiment will be described with reference to the drawings. The circuit connection device 2 according to the second embodiment is a modified example of the first embodiment, and aims to further improve the positioning accuracy of the press-fit terminals 25 and the through-holes 26. In this embodiment, a configuration will be described in which a tip tapered portion 44 of a board assembly jig 37 is pressed against a recess 48 of a guide jig 47 provided in contact with the connector mounting surface 10a of the heat sink 10.

[0062] 14 is a perspective view of a guide jig 47 of a circuit connection device 2 according to embodiment 2, as viewed from a heat sink lower support surface 47a. The guide jig 47 has a cylindrical guide protrusion 50 with a tapered tip portion 49 and a recess 48 provided on the tip surface. The only differences from the circuit connection device 2 according to embodiment 1 are the shape of the through hole 136 of the heat sink 110 and the addition of the guide jig 47. Therefore, the reference numerals of the circuit connection device 2 are the same as those of embodiment 1.

[0063] 15 is a cross-sectional view of the circuit board assembly of the circuit connection device 2 according to embodiment 2. Guide jig 47 is assembled to connector attachment surface 110a of heat sink 110 from below.

[0064] A stepped hole 51 having a larger diameter than through hole 136 is provided coaxially with through hole 136 on the connector mounting surface 110a side of through hole 136 provided in heat sink 110. The shapes of circuit board 11, board assembly jig 37, and connector 17 are the same as those of the first embodiment.

[0065] Next, a method of assembling the circuit connection device 2 will be described. The tip tapered portion 49 of the guide jig 47 is pressed against the edge of the stepped hole 51 provided in the heat sink 110. Thereafter, with the circuit board 11 attached to the board assembly jig 37, the first columnar portion 41 of the jig positioning protrusion 39 of the board assembly jig 37 is inserted into the through hole 136 of the heat sink 110.

[0066] After the first columnar portion 41 is inserted, a load greater than the load (indicated by an upward arrow in FIG. 15) pressing the guide jig 47 against the heat sink 10 is applied in the vertical direction (indicated by a downward arrow in FIG. 15) to the non-substrate assembly surface 37b of the substrate assembly jig 37. At this time, the tip tapered portion 44 of the substrate assembly jig 37 is pressed against the recess 48 of the guide jig 47. The effects obtained by the device configured as above will be described.

[0067] In the second embodiment, a stepped hole 51 having a diameter larger than that of through hole 36 is provided coaxially with through hole 36 provided in heat sink 10. The tip tapered portion 49 of guide protrusion 50 of guide jig 47 is pressed against the edge of stepped hole 51 in heat sink 110, whereby the horizontal position of heat sink 110 with respect to guide jig 47 is accurately adjusted.

[0068] The diameter of the guide protrusion 50 is increased, and a recess 48 against which the tip tapered portion 44 of the substrate assembly jig 37 abuts is provided at the tip of the guide protrusion 50. The substrate assembly jig 37 is pressed downward to press the tip tapered portion 44 of the substrate assembly jig 37 against the edge of the recess 48 at the tip of the guide protrusion 50 of the guide jig 47, thereby adjusting the relative positions of the substrate assembly jig 37 and the guide jig 47, and also adjusting the positions of the substrate assembly jig 37 and the heat sink 110.

[0069] By applying a load that is greater than the load pressing the guide jig 47 against the heat sink 10 to the non-board mounting surface 37b of the board mounting jig 37 in the vertical direction, it is possible to adjust the positions of the board mounting jig 37 and the heat sink 10, and then adjust the positions of the circuit board 11 and the board mounting jig 37. Therefore, the positions of the circuit board 11 and the heat sink 10 can be adjusted with high precision. That is, in addition to the effect of the first embodiment, it is possible to position the heat sink 10 and the circuit board 11 with even higher precision.

[0070] 3. Third embodiment A third embodiment will be described with reference to the drawings. The circuit connection device 2 according to the third embodiment is a modification of the first embodiment, and aims to reduce the load on the circuit board 11 during assembly, in addition to improving the positioning accuracy of the press-fit terminals 25 and the through holes 26. In this embodiment, a configuration in which a cylindrical movable protrusion 53 of a board assembly jig 137 moves in the axial direction will be described.

[0071] 16 is a cross-sectional view of the circuit board assembly of the circuit connection device 2 according to the third embodiment. The board assembly jig 137 of the third embodiment includes a movable plate 54 to which a cylindrical movable protrusion 53 is fixed, a base plate 56 having a fixed protrusion 55 and a pressure protrusion 140 that pass through the cylindrical interior of the movable protrusion 53, and a spring 57 that passes through the fixed protrusion 55 and is disposed between the movable plate 54 and the base plate 56. The only differences from the circuit connection device 2 of the first embodiment are the shape of the through hole 236 of the heat sink 210 and the configuration of the board assembly jig 137. Therefore, the reference numerals of the circuit connection device 2 are the same as those of the first embodiment.

[0072] A board pressing portion 58 is provided at the tip of movable protrusion 53, and a tip tapered portion 59 is provided at the tip of fixed protrusion 55. In addition, movable plate 54 is provided with an escape hole 60 through which pressure protrusion 140 passes. In addition, a stepped hole 61 having a larger diameter than through hole 236 is provided coaxially with through hole 236 on the circuit board mounting surface 210b side of through hole 236 of heat sink 210. The shapes of circuit board 11 and connector 17 are the same as those in embodiment 1.

[0073] In circuit connection device 2 according to embodiment 3, when a load is applied to board assembly jig 137, board pressing portion 58 is pressed against the edge of board positioning through hole 28 in circuit board 11, and the reaction force of spring 57 presses circuit board 11 against heat sink 210. When further load is applied, tip tapered portion 59 of fixing projection 55 abuts against the edge of stepped hole 61 in heat sink 210. The effects obtained by the device configured as above will be described.

[0074] In the circuit connection device 2 according to the third embodiment, a stepped hole 61 having a larger diameter than the through hole 236 is provided coaxially with the through hole 236 of the heat sink 210 on the circuit board mounting surface 210b side of the through hole 236, so that the length of the board pressing portion 58 of the movable protrusion 53 can be set to be long. By pressing the tip tapered portion 59 of the fixed protrusion 55 against the edge of the stepped hole 61 of the heat sink 10, the positions of the heat sink 10 and the board assembly jig 137 can be accurately adjusted. In addition, by pressing the board pressing portion 58 of the movable protrusion 53 against the edge of the board positioning through hole 28 of the circuit board 11, the positions of the circuit board 11 and the board assembly jig 137 can be adjusted with high precision.

[0075] As a result, it becomes possible to adjust the circuit board 11 and the heat sink 210 with high precision. Furthermore, when the board pressing portion 58 of the movable protrusion 53 is pressed against the edge of the board positioning through hole 28 of the circuit board 11, the movable protrusion 53 moves and holds the circuit board 11 by the elastic force of the spring 57, so that excessive load on the circuit board 11 can be suppressed and damage to the circuit board 11 can be prevented.

[0076] 4. Fourth embodiment A fourth embodiment will be described with reference to the drawings. The circuit connection device 2 according to the fourth embodiment is a modified example of the first to third embodiments, and aims to further improve the positioning accuracy of the press-fit terminals 25 and the through-holes 26. The circuit connection device 2 according to the fourth embodiment is characterized in that a press-fit fixing rib is provided on the protrusion of the connector 17.

[0077] FIG. 17 is a perspective view of the connector 117 of the circuit connection device 2 according to the fourth embodiment, seen from the heat sink mounting surface 117a side. FIG. 18 is a front view of the connector 117 seen from the heat sink mounting surface 117a side. A first protrusion 64 and a second protrusion 65 are provided on the heat sink mounting surface 117a of the connector 117. The first protrusion 64 has a cylindrical columnar portion 64b and four ribs 64a arranged at right angles to each other with a gap between them around the columnar portion. The ribs 64a extend parallel to the axis of the columnar portion 64b. The second protrusion 65 has a cylindrical columnar portion 65b and two ribs 65a arranged on the same line with a gap between them around the columnar portion. The ribs 65a extend parallel to the axis of the columnar portion 65b.

[0078] The columnar portions 64b, 65b and the ribs 64a, 65a are provided at their tips with inclined portions 64c, 65c in a direction in which the diameter becomes smaller as they approach the tips. This makes it easier to insert the first protrusion 64 and the second protrusion 65 into the through-hole 36 of the heat sink 10. In addition, the shape of the ribs 64a, 65a makes it difficult for foreign matter to be generated even if they are scraped off when pressed in.

[0079] The shapes of the circuit board 11, the heat sink 10 and the board assembly jig 37 are the same as those of the embodiment 1. The effects obtained by the device configured as above will be described.

[0080] In the connector assembly process, the connector 117 is inserted in a direction in which the heat sink mounting surface 117a of the connector 117 comes into contact with the connector mounting surface 10a of the heat sink 10. In positioning the connector 117 and the heat sink 10, the four ribs 64a provided on the first protrusion 64 and the through holes 36 provided in the heat sink 10 regulate the position of the connector 117 in the planar direction. The two ribs 65a provided on the second protrusion 65 of the connector 117 and the through holes 36 provided in the heat sink 10 regulate the position in the rotational direction.

[0081] Thereafter, the connector 17 is fixed by press-fitting the ribs 64a, 65b around the columnar portions 64b, 65b of the connector 117 into the inner circumference of the through hole 36 of the heat sink 10. The number of ribs 65a provided on the second protrusion 65 is made smaller than that of the first protrusion 64, and the connector 17 is not completely fixed by the second protrusion 65, thereby providing some play for misalignment of the first protrusion 64, the second protrusion 65, and the through hole 36, and preventing the connector 17 from floating even if misalignment occurs. In addition, the outer diameters of the ribs 64a, 65b are set so that the press-fit load when the ribs 64a, 65b are press-fitted is lower than the insertion load of the press-fit terminal 25.

[0082] Although various exemplary embodiments and examples are described in this application, various features, aspects, and functions described in one or more embodiments are not limited to the application of a specific embodiment, but can be applied to the embodiments alone or in various combinations. Therefore, countless modifications not illustrated are expected within the scope of the technology disclosed in this specification. For example, the modification, addition, or omission of at least one component, and the extraction and combination of at least one component with components of other embodiments are included. [Explanation of symbols]

[0083] REFERENCE SIGNS LIST 1 rotating electric machine, 2 circuit connection device, 10, 110, 210 heat sink, 10a, 110a connector mounting surface, 10b, 210b circuit board mounting surface, 11 circuit board, 11a board heat sink mounting surface, 11b board heat sink non-mounting surface, 16 housing, 17 connector, 17a heat sink mounting surface, 17b connector insertion / removal side, 28 through hole, 29 power terminal, 30 signal terminal, 32 positioning protrusion, 35 opening, 36, 136, 236 through hole, 37, 137 board assembly jig, 37a board assembly surface, 37b board non-assembly surface, 39 jig positioning protrusion, 41 first columnar portion, 42 second columnar portion, 43 intermediate tapered portion, 44 tip tapered portion, 47 guide jig, 47a heat sink lower support surface, 48 Recess, 49 tip tapered portion, 50 guide projection, 51 stepped hole, 55 fixing projection, 58 board pressing portion, 59 tip tapered portion, 61 stepped hole, 64 first projection, 65 second projection, 64a, 65a rib, 64b, 65b columnar portion, 64c, 65c inclined portion, 100 rotating electrical machine device

Claims

1. a connector including a housing in which a connection terminal is accommodated inside a container having an opening, a positioning guide portion provided on a side of the housing opposite to the opening, and a press-fit terminal extending from the connection terminal; a heat sink having a guide receiving portion fitted to the positioning guide portion and an opening through which the press-fit terminal passes, and to which the housing is fixed; a circuit board having a board positioning guide portion and a through hole to which the press-fit terminal is crimped, the circuit board being fixed to a surface of the heat sink opposite to a surface to which the housing is fixed, The connector has a protrusion as the positioning guide portion, and the press-fit terminal extends parallel to the protrusion, The heat sink has a through hole as the guide receiving portion, the circuit board has a board through hole, the board positioning guide portion being concentric with the through hole; a diameter of the board through hole of the circuit board is larger than a diameter of the through hole of the heat sink, the connector has a length from a tip of the protrusion to a surface of the heat sink to which the housing is fixed that is longer than a length from a tip of the press-fit terminal to a surface of the circuit board to which the heat sink is fixed, The heat sink has a stepped hole having a diameter larger than the diameter of the through hole on the side of the surface to which the housing is fixed.

2. A connector having a housing in which a connection terminal is accommodated inside a container having an opening, a positioning guide portion provided on a side of the housing opposite to the opening, and a press-fit terminal extended from the connection terminal. a heat sink having a guide receiving portion fitted to the positioning guide portion and an opening through which the press-fit terminal passes, and to which the housing is fixed; a circuit board having a board positioning guide portion and a through hole to which the press-fit terminal is crimped, the circuit board being fixed to a surface of the heat sink opposite to a surface to which the housing is fixed, The connector has a protrusion as the positioning guide portion, and the press-fit terminal extends parallel to the protrusion, The heat sink has a through hole as the guide receiving portion, the circuit board has a board through hole, the board positioning guide portion being concentric with the through hole; a diameter of the board through hole of the circuit board is larger than a diameter of the through hole of the heat sink, the connector has a length from a tip of the protrusion to a surface of the heat sink to which the housing is fixed that is longer than a length from a tip of the press-fit terminal to a surface of the circuit board to which the heat sink is fixed, The heat sink has a stepped hole having a diameter larger than that of the through hole on a surface opposite to the surface to which the housing is fixed.

3. 3. The circuit connecting device according to claim 1, wherein the connector is provided with a pair of the positioning guides on either side of the press-fit terminal.

4. A connector having a housing in which a connection terminal is accommodated inside a container having an opening, a positioning guide portion provided on a side of the housing different from the opening, and a press-fit terminal extended from the connection terminal. a heat sink having a guide receiving portion fitted to the positioning guide portion and an opening through which the press-fit terminal passes, and to which the housing is fixed; a circuit board having a board positioning guide portion and a through hole to which the press-fit terminal is crimped, the circuit board being fixed to a surface of the heat sink opposite to a surface to which the housing is fixed, The connector is a circuit connection device having a first positioning protrusion having a cylindrical columnar portion and four ribs parallel to the axis of the columnar portion, and a second positioning protrusion having the columnar portion and two ribs parallel to the axis of the columnar portion.

5. 5. The circuit connecting device according to claim 4, wherein the connector has a diameter of the columnar portion and the rib that decreases toward the tip of the positioning projection.

6. 6. The circuit connection device according to claim 1, wherein the circuit board is fixed to the heat sink with screws.

7. 7. The circuit connection device according to claim 1, wherein the connector is fixed to the heat sink by a screw.

8. A rotating electrical machine comprising the circuit connection device according to any one of claims 1 to 7.

9. a first step in which a circuit board having a through hole for inserting a press-fit terminal and a through hole for board positioning is fixed to a front surface of a heat sink having a through hole concentric with the through hole for board positioning and having an inner diameter smaller than the inner diameter of the through hole for board positioning, and an opening through which the press-fit terminal passes; a second step of fixing a connector having a housing in which a connection terminal is accommodated inside a container having an opening, a positioning protrusion extending from the housing to a side opposite to the opening, and a press-fit terminal extending from the connection terminal in parallel to the positioning protrusion, the positioning protrusion being fitted into the through hole and the press-fit terminal being crimped into the through hole, the second step comprising: In the first step, a position of the circuit board is adjusted using a board assembly jig having a jig positioning protrusion that is inserted into the board positioning through hole of the circuit board from the side of the circuit board, and a position of the heat sink is adjusted using a guide jig having a guide protrusion that is inserted into the through hole from the back side of the heat sink, The jig positioning protrusion has tapers at its tip and middle portions, and the positions of the board assembly jig and the heat sink are adjusted by the taper at the tip and the edge of a recess provided in the guide protrusion, and the positions of the board assembly jig and the circuit board are adjusted by the taper at the middle portion and the edge of a board positioning through hole provided in the circuit board.

10. A first step in which a circuit board having a through hole for inserting a press-fit terminal and a board positioning through hole is fixed to a front surface of a heat sink having a through hole concentric with the board positioning through hole and having an inner diameter smaller than the inner diameter of the board positioning through hole, and an opening through which the press-fit terminal passes; a second step of fixing a connector having a housing in which a connection terminal is accommodated inside a container having an opening, a positioning protrusion extending from the housing to a side opposite to the opening, and a press-fit terminal extending from the connection terminal in parallel to the positioning protrusion, the positioning protrusion being fitted into the through hole and the press-fit terminal being crimped into the through hole, the second step comprising: In the first step, positions of the circuit board and the heat sink are adjusted using a board assembly jig having a jig positioning protrusion portion including a cylindrical movable protrusion and a fixed protrusion passing through the cylindrical interior of the movable protrusion, the jig being inserted into the board positioning through hole from the circuit board side; The jig positioning protrusions have tapers at the tip of the fixed protrusion, which is the overall tip, and at the tip of the movable protrusion, which is the overall middle part, and the positions of the board assembly jig and the heat sink are adjusted by the taper of the overall tip and the edge of the through hole, and the positions of the board assembly jig and the circuit board are adjusted by the taper of the overall middle part and the edge of the board positioning through hole.

11. The method for manufacturing a circuit connection device described in claim 10, wherein the jig positioning protrusion moves axially, the tip of the fixed protrusion and the tip of the movable protrusion are capable of moving relative to each other in the axial direction, and when a pressing force is applied to the taper of the tip of the movable protrusion, the length of the tip of the fixed protrusion extends, thereby adjusting the positions of the circuit board and the heat sink.

Images