JP2017152389A - Electronic controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To contribute to compaction of a device by allowing other various terminals to be connected with terminals, provided on a circuit board, with sufficient connection reliability.SOLUTION: An electronic control unit 4 has a case 5 and a cover 6 to be joined each other. A drive circuit board 7 for driving a motor unit 3 is fixed to the cover 6, and a control circuit board 8 for controlling the drive circuit board is fixed to the case 5. Furthermore, an electric connector 9 for supplying power to each board 7, 8 and motor unit 3 is attached to the opening 10 of the case 5. First electrification terminals 25, 3e of this electric connector 9 and motor unit 3, and second electrification terminals 35, 37 of the drive circuit board 7 are electrically connected directly by joining the 5, 6.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an electronic control device, and relates to an electronic control device applied to drive and control an electric motor such as an electric power steering device (EPS) of a vehicle.

  For example, as an electronic control device mounted on a vehicle such as an electric power steering device, a circuit board on which various electronic components are mounted is placed in a space inside the housing composed of a plurality of housing members (for example, cases and covers described later). Both terminals, which are accommodated and provided on the circuit board, and other various terminals (for example, current-carrying terminals such as bus bars) are applied with wire bonding or welding (DC bus bar or the like as in Patent Document 1, for example). Structures that are electrically connected to each other by welding are known.

  In addition, in order to reduce the size of the electronic control device, the two terminals are not simply connected by wire bonding or welding as described above. For example, a tuning fork terminal as disclosed in Patent Document 2 is set to one of the two terminals. And a structure in which the two terminals can be connected from opposite directions (in Patent Document 2, the input terminal (reference numeral 14) of the circuit breaker and the thin-walled tuning fork terminal (reference numeral 38) are connected) has been studied. ing.

JP2010-132102A JP2012-124294A

  However, in the two terminals connected from opposite directions, a load is applied at the time of the connection. Therefore, when a simple tuning fork terminal (thin-walled terminal) is applied to either one of the two terminals. The connection reliability may be lowered due to unstable connection. It is conceivable to increase the connection reliability of both terminals by increasing the thickness of the tuning fork terminal or reinforcing the support structure of the tuning fork terminal (reinforcing with a bus bar or the like) so that it can withstand the load as described above. This leads to an increase in the size of the device.

  The present invention has been made to solve the above-described problems of the prior art, and can connect the terminals provided on the circuit board and other various terminals with sufficient connection reliability. Thus, the problem to be solved is to contribute to downsizing of the apparatus.

  The electronic control device according to the present invention is a creation that can solve the above-described problems. One aspect of the electronic control device is that an electronic component is mounted in a housing that includes two housing members that are located in opposite directions and can be joined to each other. The circuit board is accommodated, and the circuit board is provided on one of the casing members. The electronic control device is provided on the circuit board with a first terminal disposed on the other side of the casing member. The second terminal is connected by joining the two casing members, and the second terminal is erected from the bottom surface portion that is electrically joined to the land portion of the circuit board and fixed from both ends of the bottom surface portion. A pair of bent portions bent in directions close to each other, and a pair of connection portions formed on the distal end side of each of the bent portions and positioned to face each other, and between the pair of connection portions The tip side of the first terminal is press-fitted from the upright direction side of the bent portion. It is characterized by being connected Te.

  According to the present invention, other various terminals can be connected to the terminals provided on the circuit board with sufficient connection reliability, and the apparatus can be reduced in size.

The disassembled perspective view of the electronic control unit which concerns on this embodiment. The principal part longitudinal cross-sectional view of the state which attached the same electronic control unit to the motor unit. The longitudinal cross-sectional view of the same electronic control unit. The top view of a drive circuit board. The perspective view of the joint part of a case. The perspective view of the 2nd electricity supply terminal. The block diagram of a power steering apparatus. The perspective view of the modification of the 2nd electricity supply terminal. The perspective view of the modification of a 1st electricity supply terminal. The perspective view of the modification of the 2nd electricity supply terminal.

  An electronic control device according to an embodiment of the present invention includes two casing members that are located in opposite directions and can be joined to each other, and a circuit board is provided and accommodated in one of the casing members. A first terminal (corresponding to first energization terminals 25 and 3e described later) disposed on the other side of the casing member and a second terminal (corresponding to second energization terminals 35 and 37 described later) provided on the circuit board. Can be connected with sufficient connection reliability (connection without using a tuning fork terminal or the like), and can contribute to downsizing of the apparatus.

  Hereinafter, an electronic control device according to an embodiment of the present invention will be described based on an application example to an electric power steering device. That is, as shown in FIG. 7, the electric power steering apparatus 1 includes an input shaft 2 to which a steering torque is input from a steering wheel, and a motor unit 3 that applies assist torque to the steering torque. Is driven and controlled by an electronic control unit (ECU) 4, and the electronic control device of this embodiment can be applied to the electronic control unit 4.

≪Application example of electronic control device of this embodiment≫
The electronic control unit 4 of FIGS. 1 to 7 is, for example, as shown in FIGS. 1 to 3, the base end side of the shaft 3 a of the motor unit 3 (on the side opposite to the output side end, that is, a control circuit board described later) 8 on the side corresponding to 8).

  The motor unit 3 includes an electric motor (three-phase AC brushless motor) (not shown), a motor housing 3c that houses the electric motor, the shaft 3a that is rotationally driven by the electric motor, and a base end of the shaft 3a. And a magnet S for detecting rotation of the shaft 3a by a hall element 47, which will be described later, and a first energizing terminal (three-phase motor terminal) 3e connected to the three-phase terminals of the motor. . The shaft 3a is rotated by driving the electric motor, and applies assist torque to the steering torque via a reduction gear (not shown). In addition, an exterior portion 3f having a large outer dimension is formed on the electronic control unit 4 side of the motor housing 3c.

  Specifically, the electronic control unit 4 includes a case (housing member) 5 that is fixed to the exterior portion 3f of the motor housing 3c, a cover (housing member) 6 that is joined to the case 5, and a space between the five and six. A drive circuit board 7 that is housed in the drive circuit and drives the electric motor; a control circuit board 8 that is housed between the two and 6 and controls the drive of the drive circuit board 7; It has board | substrates 7 and 8 and the electrical connector 9 which supplies electric power etc. to the said electric motor.

(1) Case 5
The case 5 is a part of a housing that accommodates the circuit boards 7 and 8, and is formed in a box shape having an upper portion opened, for example, by an aluminum alloy material, and is erected on the bottom plate 5a and the edge of the bottom plate 5a. As shown in FIG. 1, the upper portion of the bottom plate 5a is formed so as to protrude in the opposite direction to the side plate 5b.

  An opening 10 for attaching the electrical connector 9 is formed at the top of the bottom plate 5a, holes 10a are provided around the outer periphery of the opening 10, and female screws for fixing the electrical connector are provided at the upper four corners on the motor housing 3c side. A hole 12 is formed.

  In addition, an annular joint portion 11 is formed in the lower portion of the bottom plate 5a on the motor housing 3c side, and is fitted into the opening 3d of the exterior portion 3f, and female screw holes 17 for fixing to the exterior portion 3f are formed in the four corners. Has been. A shaft portion of a fixing screw (not shown) inserted into the through hole of the exterior portion 3f is fastened to the female screw hole 17.

  A circular opening 13 for receiving the sensor magnet S attached to the base end (shaft base end) of the shaft 3 a is formed in the center of the joint 11, and a three-phase motor side is formed below the opening 13. Three horizontally-long rectangular openings 14 through which the first energization terminals (three-phase motor terminals) 3e are inserted are formed, and energization connecting the two circuit boards 7 and 8 is performed obliquely above and to the left and right of the opening 13. A pair of vertically long rectangular openings 16 are formed at the tip of the terminal 15.

  Further, a plurality of columnar substrate fixing portions 18 for fixing the control circuit substrate 8 are erected on the cover 6 side of the bottom plate 5a. A fitting groove 20 is provided around the upper end of each side plate 5b along the outer shape of the case 5, and a boss portion 19 is formed at a predetermined position on the outer surface of each side plate 5b.

(2) Cover 6
As shown in FIGS. 1 to 3, for example, the cover 6 is formed of an aluminum alloy material or the like in a rectangular shape along the outer shape of the case 5, and closes the opening of the case 5. A fitting projection 23 that fits into the fitting groove 20 is provided around the edge of the cover 6 on the case 5 side along the outer shape.

  Further, the cover 6 is formed with a group of female screws 21a for fixing the drive circuit board 7 to the left and right edges, and a boss portion 22 is formed on each end surface at a position corresponding to the boss portion 19. Omitted through holes are formed. A shaft portion of a fixing screw (not shown) inserted through the through hole is fastened to a female screw hole of the boss portion 19. A heat sink (not shown) is formed on the side of the cover 6 opposite to the case 5.

(3) Electrical connector 9
The electrical connector 9 is attached to the outer peripheral edge of the opening 10 of the case 5, and as shown in FIGS. 1 to 3 and 5, the substantially central portion of the first conductive terminal (power supply terminal) 25 on the connector side is sealed with resin. A pair of first connectors C1, a first connector C2 in which a substantially central portion of various signal terminals (torque / S, ignition SW, etc.) 26 is resin-enclosed, and a substantially central portion of a CAN communication terminal 27 is encapsulated in a resin. 1 connector C3 and a second connector 28 to which the first connectors C1 to C3 are fixed, and the opening 10 is closed by the second connector 28.

  The second connector 28 includes a connector holder that holds the first connectors C1 to C3, and three attachment holes 29a through which the first connectors C1 to C3 are inserted are formed. The outer periphery of the resin portion 30 of the first connector C1 to C3 is coupled to the inner surface of each mounting hole 29a, and the first connector C1 to C3 is held and fixed to the second connector 28. Specifically, when connecting the two connectors C1 to C3 and 28, the first connectors C1 to C3 in which the substantially central portions of the terminals 25 to 27 are sealed with resin are inserted into the mounting holes 29a of the second connector 28, respectively. Combine. After this connection, an adhesive (sealant) is applied to the gap between the two C1 to C3 and 28 to reinforce the waterproofness of the gap and the bonding force between the two C1 to C3 and 28. The electrical connector 9 is completed by the combination of the connectors C1 to C3 and 28, and is attached to the outer peripheral edge of the opening 10.

  At this time, the mounting portion 28a to be mounted in the circumferential groove 10b formed on the outer peripheral edge of the opening 10 is provided on the case 5 side of the second connector 28, while the connector is fitted on the opposite side to the case 5. Joint portions 33a to 33c are formed. Further, through holes 30a are formed at the four corners of the second connector 28, and shaft portions of fixing screws (not shown) inserted into the through holes 30a are fastened to the female screw holes 12 of the case 5, and the through holes at both ends are provided. Between 31a, the pin 31 inserted in the hole 10a of case 5 is formed. Since the pins 31 and the holes 10a are formed in an asymmetrical number, it is possible to prevent the electrical connector 9 from being attached to the left and right by mistake.

  One end of each of the terminals 25 to 27 (one end of the terminal 25 corresponds to, for example, one end 90 of FIG. 9; hereinafter, reference numerals and the like are omitted as appropriate) is disposed on the drive circuit board 7 side, while the other end Are arranged in the connector fitting portions 33a to 33c. For example, as shown in FIGS. 3 and 5, one end of each of the terminals 26 and 27 is formed in a pin shape, while one end of the first energizing terminal 25 is formed in a tapered band shape, and the tip thereof Are cut into a V shape, and the inner surfaces of the tip ends of the pair of sandwiching portions 25a are formed in a tapered shape. One end of the three-phase-side first energizing terminal 3e (one end of the terminal 3e corresponds to, for example, one end 90 in FIG. 9; hereinafter, reference numerals and the like are omitted as appropriate) also has a similar tapered shape. To do. ).

  In addition, the connector fitting part formed in the electrical connector of the external apparatus (for example, power supply battery etc.) not shown in figure is inserted in each connector fitting part 33a-33c, and the other end part of each terminal 25-27 is an external, respectively. Electrically connected to the terminal of the electrical connector of the device.

(4) Drive circuit board 7
The drive circuit board 7 converts the current supplied from the electrical connector 9 into three-phase (U-phase, V-phase, W-phase) alternating current, and drives the electric motor in accordance with a control signal from the control circuit board 8. Regarding modules.

  In the drive circuit board 7, a wiring pattern (not shown) is formed on a plate made of a metal material serving as a base via an insulating layer. As shown in FIG. 4A, one end of each first energization terminal 25 is formed. And a driving transistor (driving element, switching element) 36 in which the upstream side P and the downstream side Q are electrically connected in series for each phase of the three-phase alternating current. And the 2nd electricity supply terminal 37 for three-phase motors electrically connected with the one end part of each said 1st electricity supply terminal 3e is mounted.

  In other words, the drive transistor 36 is mounted on the drive circuit board 7 in an array of “two (a set in which the upstream P and the downstream Q are a pair) × 3 sets (for three phases)”. The second energization terminal 37 is arranged between the drive transistor 36 and each of the downstream drive transistors 36, and supplies a three-phase alternating current to each first energization terminal 3e. Each said 2nd electricity supply terminal 35 is arrange | positioned facing the one end part of the said 1st electricity supply terminal 25, and each said 2nd electricity supply terminal 37 is arrange | positioned facing the one end part of the said 1st electricity supply terminal 3e.

  The drive circuit board 7 is mounted with electronic components such as the smoothing capacitor 38 of FIG. 4, the fail-safe relay 39 when a failure occurs, and the coil 60. The smoothing capacitor 38 smoothes the current supplied by the connection between the current-carrying terminals 25 and 35 and supplies the smoothed current to each drive transistor 36.

  Further, the base end portion of the energizing terminal 15 is electrically joined to the left and right edges of the drive circuit board 7, and a group of through holes 45 for fixing to the cover 6 is formed. The shaft portion of the fixing screw 46 inserted through each through hole 45 is fastened to the female screw hole 21 of the cover 6 as shown in FIG.

(5) Second energization terminals 35 and 37
Each of the second energization terminals 35 and 37 is formed by bending a metal plate material such as a copper material, and is electrically joined to a land portion 71 formed at a predetermined position of the drive circuit board 7, for example, as shown in FIG. Each of the bent portions 42, a pair of bent portions 42 that are raised from both end portions 40 a and 40 b of the bottom portion 40 and bent in directions close to each other (hereinafter referred to as bent portion adjacent directions). A pair of connection portions 43 formed on the distal end side and positioned facing each other (opposing in the bent portion proximity direction), and one end portion of the first energization terminal 25 with respect to the gap portion 44 between the connection portions 43 And one end of the first energizing terminal 3e is press-fitted and electrically connected.

  The land portion 71 can be formed by opening a desired position according to the shape of the bottom surface portion 40 in a mask 72 formed by masking a photoresist or the like on one end surface side of the drive circuit board 7, for example. Since the land portion 71 and the bottom surface portion 40 are electrically joined to fix the second current-carrying terminals 35 and 37, the fixed support area (the land portion 71 and the bottom surface portion 40 is compared with the case where a tuning fork terminal or the like is used). And a stable connection structure can be obtained.

  Each bent portion 42 includes an upright portion 42a that protrudes in the thickness direction of the drive circuit board 7 from both end portions 40a or 40b of the bottom surface portion 40 facing each other, and a bent portion from the distal end side of each upright portion 42a. An extension portion 42b extending in the proximity direction, and press-fitting one end portion of the first energization terminal 25 and one end portion of the first energization terminal 3e into the gap portion 44 between the connection portions 43 (of the upright portion 42a). It is configured to be elastically deformed by press-fitting from the standing direction side).

  The distance between the connecting portions 43 (the width of the gap portion 44) is set to be smaller than the dimension in the cross-sectional direction of one end portion of the first energizing terminal 25 or one end portion of the first energizing terminal 3e, thereby allowing both terminals 25 , 3e is set to be press-fitted into the gap portion 44 with a predetermined pressure input (hereinafter referred to as terminal pressure input), that is, the distance between the connection portions 43 is expanded and the bending portions 42 are elastically deformed to press-fit. Can be set. In addition, after the press-fitting, the terminals 25 and 3e are set so as to be clamped by the respective connecting portions 43 with a predetermined clamping force, that is, the restoring action of each bent portion 42 elastically deformed as described above is Can be set to act as a force. Therefore, since each bending part 42 can also be designed so that clamping force may become a desired magnitude | size, it will also contribute to connection reliability.

  In addition, each connecting portion 43 in FIG. 6 is formed to bend and extend from the distal end side of each bent portion 42 (the distal end side of the extending portion 42b in FIG. 6) to the bottom surface portion 40 side. One end portion of the first energizing terminal 25 and one end portion of the first energizing terminal 3e are easily press-fitted into the gap portion 44 along the extending direction of the portion 43, and one end portion of each of the terminals 25 and 3e thus press-fitted Is configured to be easily held between the connection portions 43.

(6) Control circuit board 8
The control circuit board 8 is configured by a printed board (glass epoxy board) or a ceramic board. For example, as shown in FIG. 1, the control circuit board 8 includes a microcomputer (CPU: hereinafter abbreviated as a microcomputer) 4m for controlling each driving transistor 36 and a hall element for detecting the rotation of the electric motor. Have.

  The microcomputer 4m is mounted on the surface of the control circuit board 8 facing the drive circuit board 7, while the hall element 47 is accommodated in the surface opposite to the microcomputer 4m, that is, the opening 13 of the case 5. 4m and 47 are electrically connected through the circuit pattern of the control circuit board 8, and the circuit pattern is a signal transmission path between the both 4m and 47.

  That is, the Hall element 47 is disposed at a position facing the sensor magnet S on one end portion side of the control circuit board 8, detects the magnetic field of the sensor magnet S using the Hall effect, and rotates the shaft 3a. Is detected. This detection signal is input to the microcomputer 4m through the circuit pattern of the control circuit board 8.

  Further, for example, as shown in FIG. 6, the front end portion of the energizing terminal 15 is inserted into one end side of the control circuit board 8 and is electrically connected by soldering or welding. On the other hand, a cutout portion 49 is formed on the other end portion side of the control circuit board 8 to allow one end portion of the energization terminal 25 to pass to the drive circuit board 7 side. One ends of the terminals 26 and 27 are inserted into and electrically connected to both sides of the notch 49.

  Therefore, the microcomputer 4m controls the drive transistor 36 based on information (for example, steering torque, vehicle speed signal, etc.) input from the outside through the both terminals 26 and 27 of the electrical connector 9 and the detection signal of the Hall element 47.

  Note that through holes 48 are formed in the left and right edges of the control circuit board 8, and as shown in FIGS. 2 and 3, the shaft portion of the fixing screw 48 a inserted into each through hole 48 is the board of the case 5. It is fastened to the female screw hole of the fixing portion 18.

(7) Assembly procedure Hereinafter, the assembly procedure of the electronic control unit 4 will be described. First, the control circuit board 8 and the electrical connector 9 are attached to the case 5, and the drive circuit board 7 is attached to the cover 6.

  When the control circuit board 8 is attached, the shaft portion of the fixing screw 48a is inserted into each through hole 48 of the control circuit board 8 with the Hall element 47 facing the opening 13 of the cover 6, and then each fixing is performed. The shaft portion of the screw 48 a is fastened to the female screw hole of each substrate fixing portion 18 of the case 5.

  When the electrical connector 9 is attached, the first connectors C1 to C3 in which the substantially central portions of the terminals 25 to 27 are sealed with resin are inserted into the second connector 28 and the connection is completed. Attach to the periphery. That is, the mounting portion 28a of the second connector 28 is fitted into the circumferential groove 10b of the case 5, and the pin 31 is fitted into the hole 10a. Thereafter, the shaft portion of the fixing screw is inserted into the through hole 30a and fastened to the female screw hole 12, and then one end portions of the terminals 26 and 27 are electrically joined to the control circuit board 8 by soldering. When attaching the drive circuit board 7, the shaft portion of the fixing screw 46 is inserted into the through hole 45 of the drive circuit board 7 and fastened to the female screw hole 21 of the cover 6.

  Next, the case 5 to which the electrical connector 9 and the control circuit board 8 are attached and the cover 6 to which the drive circuit board 7 is attached are assembled. In this operation, one end of the first energizing terminal 25 on the connector side is made to face the second energizing terminal 35 for power supply mounted on the drive circuit board 7 through the notch 49 of the control circuit board 8. In this state, the fitting protrusion 23 of the cover 6 is fitted into the fitting groove 20 of the case 5, and both 20 and 23 are fitted.

  At this time, one end portion of the first energization terminal 25 is press-fitted into the gap portion 44 between the connection portions 43 of the second energization terminal 35 by the fitting force of the fitting protrusion 23 into the fitting groove 20. That is, one end portion of the first energizing terminal 25 is press-fitted into the gap portion 44 while elastically deforming each bent portion 42 of the second energizing terminal 35 when both 5 and 6 are assembled. It will be in the state clamped by each connection part 43 with the clamping force by the restoring action of the part 42. FIG. Accordingly, the fitting protrusion 23 of the cover 6 is inserted into the fitting groove 20 of the case 5, and at the same time, one end of the first energizing terminal 25 is inserted into the gap 44 between the connecting portions 43 of the second energizing terminal 35. The two energization terminals 25 and 35 are directly (electrically) connected by being press-fitted against each other and sandwiched and electrically joined by the connection portions 43.

  Thus, by applying the 2nd electricity supply terminal 35, both the electricity supply terminals 25 and 35 can be connected with sufficient connection reliability. Further, it is not necessary to apply a tuning fork terminal to both the energizing terminals 25 and 35, and this can contribute to downsizing of the apparatus. In addition, since one end portion of the first energization terminal 25 is simply sandwiched and connected to each connection portion 43, that is, connected to be detachable, both the energization terminals 25 and 35 are electrically connected to each other and connected. Even if it exists, it can insert / extract easily, and it becomes easy to perform the electrical test | inspection and motor characteristic test | inspection of the electronic control unit 4 in the said insertion / extraction state.

  At the time of assembling the case 5 and the cover 6 as described above, for example, as shown in FIG. 5, the front ends of the energizing terminals 15 are inserted into the control circuit board 8, and the left and right openings of the case 5 are opened as shown in FIG. Since the housing 5 is accommodated and disposed, the energizing terminal 15 can be electrically connected to the control circuit board 8 by soldering or welding after the case 5 and the cover 6 are assembled. In this respect, the control circuit board 8 and the drive circuit board 7 can be arranged in a stacked state. After this electrical joining operation, the shaft portion of the fixing screw is inserted into the through hole of the boss portion 22 of the cover 6, and the shaft portion is fastened to the female screw hole of the boss portion 19 of the case 5. Assembly is completed.

  The electronic control unit 4 is attached to the motor unit 3 after such assembly work. In this operation, the joint portion 11 of the case 5 is opposed to the opening 3d of the exterior portion 3f, and then the joint portion 11 is fitted into the opening 3d. At this time, since one end portion of each first energization terminal 3e faces each opening 14 of the case 5, each connection portion of the second energization terminal 37 is simultaneously inserted with the joint portion 11 like the second energization terminal 35. It press-fits into the gap portion 44 between 43, is sandwiched between the connection portions 43 and is electrically connected, and both energization terminals 3e and 37 are directly (electrically) connected. Also in this respect, as in the case where the second energization terminal 35 is applied, both the energization terminals 3e and 37 can be connected with sufficient connection reliability, contributing to downsizing of the apparatus, and electronic control. It becomes easy to perform the electrical inspection and the motor characteristic inspection of the unit 4 in the insertion / extraction state.

  For example, when connecting the energization terminal 25 and the like to the drive circuit board 7 based on Patent Document 1, for example, a DC bus bar for wire bonding or welding is applied, but FIG. By applying the current-carrying terminals 35 and 37 having the structure shown, a DC bus bar or the like for wire bonding or welding becomes unnecessary. In this respect, the number of parts of the electronic control unit is reduced as compared with Patent Document 1. It can be said that it can contribute to the cost reduction of the apparatus. In addition, the reduction in the number of parts can contribute to simplification of the manufacturing man-hours of the apparatus, and the work labor can be reduced.

  Next, the shaft portion of the fixing screw is inserted into the through hole of the boss portion 3g, and the shaft portion is fastened to the female screw hole 17 of the case 5, whereby the electronic control unit 4 is attached to the motor housing 3c. In this case, since the electric motor and the power module are fixed to different housing members (case 5 or cover 6), the thermal interference generated in each can be suppressed, which can contribute to improvement of heat dissipation.

  In addition, since the second current-carrying terminal 37 is disposed between the upstream-side P drive transistor 36 and the downstream-side Q drive transistor 36 in view of the component arrangement of the drive circuit board 7, the shaft 3 a of the electric motor and the second Arrangement interference with the two energizing terminals 37 can be suppressed. Furthermore, since the wiring distance between both drive transistors 36 and the second energization terminal 37 can be shortened, the complexity of the wiring can also be suppressed.

  The assembly order of the electronic control unit 4 is not particularly limited, and the motor unit 3 and the case 5 may be assembled first, and then the case 5 and the cover 6 may be assembled.

≪Modification≫
For example, as described above with reference to FIG. 6 and the like, the second energization terminals 35 and 37 stand up from the bottom surface portion 40 that is connected and fixed to the land portion 71 at a predetermined position of the circuit board 7 and from both ends of the bottom surface portion 40. Various terminals (for example, a connection target) having a pair of bent portions 42 bent in the vicinity of the bent portions and a pair of connection portions 43 formed on the distal end side of each bent portion 42 and facing each other. The design can be changed as appropriate as long as the first energizing terminals 25 and 3e are configured to be press-fitted between the pair of connecting portions 43 from the standing direction side of the bent portion 42 and electrically connected. is there.

  As in the case of the pair of bent portions 42 shown in FIG. 6 and the like, in the case of a structure having an upright portion 42a and an extended portion 42b extending in the bent portion proximity direction from the distal end side of the upright portion 42a, it extends. In the part 42b, it will be located facing the bottom face part 40. If the extending portion 42b is flat as shown in FIG. 6 or the like and can be sucked by a suction-type automatic component mounting machine or the like, the second energizing terminal 35, 37 can be automatically mounted on a predetermined position of the circuit board 7, which can contribute to simplification of the manufacturing man-hours of the apparatus and can reduce the work effort.

  The bottom surface portion 40 may be configured to be electrically joined and fixed to the land portion 71, and a conductive bonding material such as solder (not shown) between the bottom surface portion 40 and the land portion 71. It may be a structure that is electrically joined (soldered or the like) with a gap interposed, or a structure that is electrically joined by welding or the like. When various electronic components (such as the smoothing capacitor 38) mounted on the circuit board 7 are electrically joined by a conductive bonding material such as solder, the bottom surface portion 40 and the land portion are connected to each other when the various electronic components are electrically joined. Electrical joining (electrical joining using the same conductive binder) is also possible, which can contribute to the simplification of manufacturing man-hours and can reduce work labor.

  The shape of the bottom surface portion 40 can be appropriately set according to the shape of the land portion 71 and the like. However, as the shape of the bottom surface portion 40 increases, that is, the fixed support area (land portion 71 for the land portion 71). The connection structure of the second energization terminals 35 and 37 with respect to the land portion 71 becomes more stable, for example, the connection area of the first energization terminals 25 and 3e between the connection portions 43 increases. The durability against press-fitting is also improved. In addition, motor efficiency due to a decrease in electrical resistance is improved, and generation of heat is suppressed. Further, by forming a through hole 45 penetrating in the thickness direction in the bottom surface portion 40, when electrically joined to the land portion 71 via a conductive binder, it has a relatively soft property such as liquid or semi-liquid. The conductive bonding material in a state is easily filled into the through-hole 45, and an anchor effect is obtained by solidifying the filled conductive bonding material (the filled conductive bonding material functions as an anchor), and the connection The structure becomes more stable.

  For example, as shown in FIG. 8, the land portion 71 may have a structure having a mask region 72a with a mask 72 interposed between both end portions 71a, 71b and the central portion 71c. By electrically joining the bottom surface portion 40 to the land portion 71 having such a structure via a conductive bonding material, for example, terminal pressure input acts on both end portions 40 a and 40 b of the bottom surface portion 40, and both end portions of the land portion 71. Even if a crack occurs in the conductive bonding material located at 71a and 71b, the mask region 72a prevents the crack from progressing to the conductive bonding material on the central portion 71c side, so that connection reliability is maintained. It can be said that it becomes easy to be done.

  Further, as shown in FIG. 8, a notch 71 d may be formed at the center 71 c of the land 71 to form a constricted shape. In this case, the bottom surface portion 40 may be formed in a constricted shape by forming the notch portion 41 in the central portion 40c in accordance with the shape of the land portion 71. In such a conductive binder interposed between the constricted land portion 71 and the bottom surface portion 40, when it is in a relatively soft state such as liquid or semi-liquid and protrudes from between the two 40, 71, The protruding conductive binder is likely to return between the portions 40 and 71 due to surface tension acting at the positions of the notches 41 and 71d. As a result, even when the central portion 40c of the bottom surface portion 40 and the central portion 71c of the land portion 71 can be displaced from each other, the displacement is suppressed because the two portions 40c and 71c are easily displaced in the matching direction. It will be possible.

  One end portions of the first energization terminals 25 and 3e are elastically deformed in the Y direction in the drawing by forming a groove portion 91 on the side edge side of the one end portion 90, for example, as one end portion 90 shown in FIG. It may be easy. Thereby, even when the press-fit angle when the press-fit angle is inserted into the gap 44 between the connection portions 43 of the terminals 35 and 37 is displaced, the one end portion 90 is easily corrected in the Y direction in the figure, and the connection reliability is improved. It becomes easy to obtain. Further, when the groove portion 92 is formed on the distal end side of the one end portion 90, the one end portion 90 is easily elastically deformed with respect to the X direction or the θ direction in the drawing, and even if the press-fit angle is misaligned. Is easily corrected in the X direction and θ direction in the figure, and connection reliability is easily obtained. In the second energizing terminals 35 and 37, for example, as shown in FIG. 10, a groove 93 may be formed on the side edge side of the bent portion 42, and the bent portion 42 is easily elastically deformed. It can contribute to reliability.

  Various materials can be applied to the first energization terminals 25 and 3e and the second energization terminals 35 and 37 as long as they can be electrically connected to each other. As a specific example, the first energizing terminals 25 and 3e are made of a conductive material such as pure copper, and the second energizing terminals 35 and 37 are made of a conductive material such as phosphor bronze and are elastic. It is mentioned to apply what has.

≪Others≫
The present invention is not limited to the configuration of the embodiment and the like, and can be modified and implemented within the scope described in each claim. For example, the present invention can be applied not only to the electric power steering device 1 but also to an electronic control device (electronic control unit) such as an electric brake device of an automobile or a variable valve device of an internal combustion engine.

  Further, the first energization terminal 3 e can be coupled to the motor side terminal by joining the case 5 and the cover 6. To describe this procedure, first, the first connectors C1 to C3 in which the substantially central portions of the terminals 25 to 27 are sealed with resin are inserted into the mounting holes 29a of the second connector 28 and coupled. After this connection, an adhesive (sealant) is applied to the gap between the two C1 to C3 and 28 to enhance the waterproofness of the gap and the bonding force between the two C1 to C3 and 28.

  Next, the electrical connector 9 is attached to the outer peripheral edge of the opening 10 of the case 5, and one end of the first energization terminal 3 e is coupled to the second energization terminal 37 of the drive circuit board 7. If the case 5 and the cover 6 are assembled in this state, one end of the first energizing terminal 25 is coupled to the second energizing terminal 35 and at the same time, the other end of the first energizing terminal 3e is connected to the motor side in the motor housing 3c. Connect with terminal.

In addition, technical ideas other than the invention described in the scope of claims ascertained from the respective embodiments will be exemplified below.
[Claim a] In the electronic control device according to any one of claims 1 and 2,
The electronic control device according to any one of claims 1 and 2, wherein the central portion of the land portion is formed in a constricted shape by forming a notch portion in the central portion.
The electronic control device according to claim 1, wherein the bottom portion is formed with a through-hole penetrating in the thickness direction of the bottom portion.

3 ... Motor unit 3e, 25 ... 1st energization terminal (1st terminal)
4 ... Electronic control unit (electronic control unit)
5 ... Case (the other casing member)
6 ... Cover (one housing member)
7 ... Drive circuit board (circuit board)
8 ... Control circuit board 15 ... Energization terminal (energization member)
35, 37 ... second energizing terminal (second terminal)
40 ... Bottom part 42 ... Bending part 43 ... Connection part 71 ... Land part 72 ... Mask

Claims (2)

An electronic control device in which a circuit board on which one of the casing members is mounted and an electronic component is mounted is housed in the casing. And
The first housing is connected by fixing the two housing members, the first terminal is disposed on the other of the housing members, and the second terminal provided on the circuit board,
The second terminal includes a bottom surface portion that is electrically bonded and fixed to a land portion of the circuit board, a pair of bending portions that are raised from both ends of the bottom surface portion and bent in directions close to each other, and the respective bending portions. It has a pair of connecting portions that are formed on the tip side and arranged to face each other,
The first terminal is a connector terminal or a motor terminal;
Between the pair of connection portions, the distal end side of the first terminal is inserted from the standing direction side of the bent portion and becomes electrically connectable,
In the land portion, a mask region is formed between both end portions and a central portion of the land portion, and a conductive bonding material is interposed between the land portion and the bottom surface portion of the second terminal, thereby the land portion. An electronic control device characterized in that a part and the bottom part are electrically joined.   Each of the bent portions has a pair of upright portions that are erected from both ends of the bottom surface portion facing each other, and an extended portion that extends from the distal end side of each of the erected portions in the proximity of the bent portion. The electronic control device according to claim 1, wherein

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