Circuit integrated motor

Abstract

To provide a circuit integrated motor that can reliably regulate the positional displacement of a press-fit portion that is press-fitted and fixed into a through-hole in a circuit board, thereby preventing a current failure caused by the displacement.SOLUTION: A circuit integrated motor 1 is provided a casing 2 and is formed with a plurality of boss portions 13, and includes base members 3, 24 on which a plurality of terminal holding portions 25 are arranged in a circumferential direction around an output shaft 6 to which a rotor 7 is fixed, a substrate 15 which is joined by a joining member 18 with one side of the substrate 15 abutting against each boss portion 13, and a plurality of press-fit terminals 14 which are held by each terminal holding portion 25 and connected to the coil 8a, and whose tip press-fit portions 14a are press-fitted and fixed into through holes 19 in the substrate 15, where a movement restricting portion 14c that abuts against one side of the substrate 15 is integrally formed with each press-fit terminal 14, and each of the boss portions 13 is disposed in the vicinity of each of the press-fit terminals 14.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a circuit-integrated motor. [Background technology]

[0002] For example, Patent Document 1 discloses a circuit-integrated motor using press-fit terminals. Three press-fit terminals are erected in through holes provided on the upper surface of a motor case, and the base end of each press-fit terminal is connected to the lead wire of each phase coil wound around a stator. A press-fit portion is formed at the tip of the press-fit terminal, and each press-fit portion is press-fitted and fixed into a through hole of a substrate arranged on the motor case. The press-fit portion contacts the conductor pattern on the inner circumferential surface of the through hole, and is electrically connected to a drive control circuit mounted on the substrate via this conductor pattern. As a result, the coils of each phase are connected to the drive control circuit via the press-fit terminal, and the coils of each phase are energized by the drive control circuit to operate the motor. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2021-158763 A Summary of the Invention [Problem to be solved by the invention]

[0004] For example, in order to smoothly press-fit the press-fit portion into the through-hole, the width of the press-fit portion is gradually increased from the tip side, and then gradually decreased after passing the maximum width. The press-fit portion is pressed into the through-hole until its maximum width is located inside the through-hole, and contact with the through-hole is maintained only by the holding force generated by the friction between the press-fit portion and the through-hole. Therefore, in order to obtain sufficient holding force, it is necessary to strictly control various dimensions such as the maximum width of the press-fit portion and the inner diameter of the through-hole, but even if such measures are taken, there are cases in which the holding force is insufficient and the press-fit portion is displaced inside the through-hole.

[0005] For example, in the circuit-integrated motor of Patent Document 1, the upper surface of the motor case restricts the positional displacement of the press-fit terminal in the direction opposite to the press-fitting direction, but does not restrict its positional displacement in the press-fitting direction. If the press-fit terminal is displaced in the press-fitting direction, the narrower press-fit portion will be positioned inside the through-hole and will not be able to maintain a normal contact state, which may result in poor conductivity and failure to energize the coil normally, reducing the reliability of the motor.

[0006] The present invention has been made to solve these problems, and its object is to provide a circuit-integrated motor that can reliably regulate the positional displacement of a press-fit portion that is press-fitted into a through-hole in a circuit board, thereby preventing poor electrical conductivity caused by positional displacement and thereby improving reliability. [Means for solving the problem]

[0007] In order to achieve the above object, the circuit-integrated motor of the present invention comprises a base member provided in a casing, having insulating properties, and having a plurality of boss portions formed thereon, and a plurality of terminal holding portions arranged in a circumferential direction around an output shaft to which a rotor is fixed; a substrate joined to each of the boss portions by a joining member with one side surface abutting each of the boss portions of the base member; and a plurality of press-fit terminals held by each of the terminal holding portions of the base member and connected to the coils of each phase wound around the stator, and having press-fit portions at their tips press-fit into through holes formed in the substrate, connecting the coils of each phase to the substrate, wherein each press-fit terminal is integrally formed with a movement restricting portion that abuts against one side surface of the substrate, and each boss portion is disposed in close proximity to each of the press-fit terminals.

[0008] In another embodiment, a drive control circuit for energizing the coils of each phase may be mounted on the board, and a plurality of press-fit terminals may connect the coils of each phase to the drive control circuit on the board.

[0009] In another aspect, each movement restricting portion may be formed on both sides of the press-fit portion.

[0010] As another aspect, each press-fit terminal may include two press-fit portions, and each movement restricting portion may be formed between the two press-fit portions.

[0011] In another embodiment, the coupling member may be a screw member that screws into the boss portion to fasten the substrate to the boss portion.

[0012] In another embodiment, the joining member may be a cured layer of adhesive interposed between the substrate and the boss portion.

[0013] In another aspect, the casing may have an opening closed by a cover member, and the connecting members may be formed on the cover member corresponding to each boss portion, with a plurality of pressing surfaces that sandwich the substrate between each boss portion.

[0014] In another aspect, each boss portion may be provided between a pair of adjacent press-fit terminals, and each boss portion may be connected to the board by a connecting member.

[0015] In another embodiment, each boss portion may be integrally provided on the base member so as to protrude therefrom.

[0016] In another embodiment, each boss portion may be a spacer member disposed on a base member and sandwiched between the base member and the substrate. Effect of the Invention

[0017] According to the circuit-integrated motor of the present invention, the positional displacement of the press-fit portion press-fitted into the through-hole of the substrate can be reliably regulated, thereby preventing poor electrical conductivity caused by positional displacement, thereby improving reliability. [Brief description of the drawings]

[0018] [Figure 1] 1 is a perspective view showing a circuit-integrated motor according to an embodiment; [Diagram 2] FIG. 4 is a cross-sectional view of the motor showing the location of the substrate. [Diagram 3] FIG. 2 is a plan view showing the motor with the upper case not shown. [Figure 4] FIG. 2 is a plan view showing the motor with the upper case and the circuit board not shown. [Diagram 5] FIG. 2 is a perspective view showing the motor with an upper case and a center case not shown. [Figure 6] 6 is an exploded perspective view corresponding to FIG. 5 in which the substrate and the press-fit terminals are separated. FIG. [Figure 7] FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. [Figure 8] FIG. 8 is a cross-sectional perspective view taken along line VIII-VIII in FIG. [Figure 9] FIG. 9 is a cross-sectional perspective view taken along line IX-IX in FIG. [Figure 10] 9 is a cross-sectional perspective view corresponding to FIG. 8 in which the substrate and the press-fit terminal are separated. [Figure 11] 9 is a sectional perspective view corresponding to FIG. 8 and showing a first modified example in which movement restricting portions are formed on both sides of a press-fit portion. FIG. [Figure 12] 9 is a sectional perspective view corresponding to FIG. 8 and showing a second modified example in which there is one press-fit portion. FIG. [Figure 13] 8 is a cross-sectional view corresponding to FIG. 7 and showing a third modified example in which a substrate is bonded onto a boss portion. FIG. [Figure 14] 8 is a cross-sectional view corresponding to FIG. 7 and showing a fourth modified example in which the board is sandwiched between the boss portion and a pressing surface formed on the upper case. FIG. [Figure 15] 8 is a cross-sectional view corresponding to FIG. 7 and showing a fifth modified example in which the boss portion is a spacer member separate from the central case. FIG. [Figure 16] 4 is a plan view corresponding to FIG. 3, illustrating an arrangement of boss portions when press-fit terminals are spaced at 120° intervals in the circumferential direction. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a circuit-integrated motor embodying the present invention will now be described. In the following description, the circuit-integrated motor may also be simply referred to as a motor. Fig. 1 is a perspective view showing the circuit-integrated motor of this embodiment, Fig. 2 is a cross-sectional view of the motor showing the circuit board, Fig. 3 is a plan view showing the motor without the upper case, and Fig. 4 is a plan view showing the motor without the upper case and the circuit board. For the sake of convenience, the up and down directions are expressed below assuming that the motor is in the position shown in Fig. 1 with the output shaft facing downward.

[0020] As shown in Figures 1 and 2, the casing 2 of the motor 1 is made up of a central case 3 with a pair of bracket parts 3a integrally formed therewith, an upper case 4 closing the upper side of the central case 3, and a lower case 5 closing the lower side of the central case 3, and is cylindrical in shape extending vertically as a whole, defining a space inside. Each of the cases 3 to 5 is made of an insulating synthetic resin material. An output shaft 6 extending vertically is disposed in the center of the casing 2, and is rotatably supported by a bearing (not shown). The lower end of the output shaft 6 protrudes outside the casing 2.

[0021] A rotor 7 having a permanent magnet is fixed to the output shaft 6 inside the casing 2, and a stator 8 having U, V, and W phase coils 8a wound around a core is disposed on the outer periphery of the rotor 7. The motor 1 is used to drive various devices, and is attached to the device to be driven by bolts via the bracket portion 3a, and the output shaft 6 protruding outward is connected to the device to be driven to drive it.

[0022] The central case 3 is integrally formed with an upwardly facing mounting base surface 9 that forms an annular shape centered on the axis C of the output shaft 6, and a cylindrical peripheral wall 10 that surrounds the mounting base surface 9, and a board accommodating chamber 11 is defined between these portions 9, 10 and the upper case 4. A shaft hole 9a is formed in the center of the mounting base surface 9, and the upper end of the output shaft 6 protrudes into the board accommodating chamber 11 through this shaft hole 9a, and a magnet 12 is fixed thereto.

[0023] 2 to 4, boss portions 13 are respectively provided at three positions on the mounting base surface 9, and the upper surface of each boss portion 13 is flat. Press-fit terminals 14 are provided at six positions on the mounting base surface 9, and the base end of each press-fit terminal 14 is connected to the coil 8a of one of the phases of the stator 8, and two press-fit portions 14a formed at the tip end protrude upward. The connection points between the press-fit terminals 14 and the coils 8a will be described in detail later.

[0024] A circular plate-shaped substrate 15 is disposed within the substrate housing chamber 11, and a sensor body 16 is provided at the center of its underside. The sensor body 16 faces the magnet 12 to form a Hall sensor 17, which outputs a detection signal that changes according to the rotation angle of the rotor 7 while the motor 1 is in operation. Although not shown, the substrate 15 is also equipped with an inverter circuit that energizes each coil 8a of the stator 8 to operate the motor 1, and a control circuit that controls the inverter circuit based on the detection signal from the sensor body 16. The control circuit and the inverter circuit correspond to the "drive control circuit" of the present invention.

[0025] The bottom surface of the substrate 15 abuts on each boss portion 13, and screws 18 are screwed into the boss portions 13 from above to fasten the substrate 15 to each boss portion 13. The bottom surface of the substrate 15 corresponds to "one side" of the substrate in the present invention. In this state, the press-fit portions 14a of the press-fit terminals 14 are press-fitted and fixed into through holes 19 that penetrate the substrate 15. The press-fit portions 14a contact a conductor pattern (not shown) formed on the inner circumferential surface of the through holes 19, and are electrically connected to the inverter circuit via the conductor pattern. As a result, the coils 8a of each phase of the stator 8 are connected to the inverter circuit via the press-fit terminals 14.

[0026] Four press-fit terminals 20 protrude upward from the board 15 and extend into a connector housing 4a formed integrally with the upper case 4 to form a connector 21. When the motor 1 is attached to a device to be driven, a coupler of a wire harness from a host controller that controls the device is connected to the connector 21, enabling mutual communication between the host controller and the motor 1.

[0027] When the motor 1 configured in this manner is attached to a device to be driven and the output shaft 6 rotates, a detection signal is output from the sensor body 16 to the control circuit and also to a host controller via the connector 21. Based on various information including this detection signal, a command signal for driving the motor 1 is input from the host controller to the control circuit via the connector 21, and the control circuit controls the inverter circuit. The inverter circuit then energizes the coils 8a of each phase of the stator 8 at a predetermined energization angle, and the motor 1 operates to drive the device to be driven.

[0028] Next, the connection portion between the press-fit terminal 14 and the coil 8a will be described in detail. FIG. 5 is a perspective view showing motor 1 with upper case 4 and central case 3 not shown, FIG. 6 is an exploded perspective view corresponding to FIG. 5 with board 15 and press-fit terminal 14 separated, FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 3, FIG. 8 is a cross-sectional perspective view taken along line VIII-VIII in FIG. 3, FIG. 9 is a cross-sectional perspective view taken along line IX-IX in FIG. 3, and FIG. 10 is a cross-sectional perspective view corresponding to FIG. 8 with board 15 and press-fit terminal 14 separated.

[0029] It should be noted that, although FIG. 7 shows a fastened state of a particular boss portion 13 and FIGS. 8 to 10 show a particular press-fit terminal 14, the other boss portions 13 and press-fit terminals 14 have the same structure.

[0030] 4, 8 and 9, the mounting base surface 9 of the center case 3 is formed with six upwardly protruding portions 23 corresponding to the press-fit terminals 14. Each of the protruding portions 23 is formed with a slit 23a extending in the circumferential direction about the axis C of the output shaft 6.

[0031] As shown in Figs. 5 and 6, an upper insulator 24 is disposed below the central case 3, and the upper insulator 24 is annular and has approximately the same diameter as the central case 3. The upper insulator 24, in cooperation with a lower insulator (not shown), serves to maintain insulation between the coil 8a of the stator 8 and the core, and is made of an insulating synthetic resin material for that purpose. The upper insulator 24 is formed with terminal holding portions 25 that protrude upward in correspondence with each of the bulging portions 23 of the central case 3. Each terminal holding portion 25 is formed with a terminal holding groove 25a extending in the circumferential direction centered on the axis C of the output shaft 6, and a coil restricting groove 25b extending in the radial direction centered on the axis C perpendicular to the terminal holding groove 25a, and both open upward. As shown in Figures 8 and 9, when the central case 3 is disposed on the upper insulator 24, the bulge portions 23 are fitted into each terminal holding portion 25 from above, and the terminal holding grooves 25a open upward through each slit 23a of the bulge portions 23.

[0032] As shown in Figs. 6, 8 and 10, the press-fit terminal 14 is flat, and a central portion 14b extending in the width direction is formed at the vertical center position. The two press-fit portions 14a extend upward from the central portion 14b, and each has a shape in which the width gradually increases from the tip side and then decreases after reaching the maximum width. A trapezoidal movement restricting portion 14c is formed between the two press-fit portions 14a on the central portion 14b. A rectangular insertion portion 14d extends downward from the central portion 14b, and a coil pressure contact groove 14e having a width narrower than the wire diameter of the coil 8a is formed to open downward in the insertion portion 14d, and triangular return portions 14f are formed on both sides in the width direction.

[0033] As shown in Figs. 8 to 10, the lead wire 8a1 is drawn from the coil 8a of each phase and disposed at the bottom of the coil restriction groove 25b of the terminal holding portion 25 of the upper insulator 24. The insertion portion 14d of the press-fit terminal 14 is inserted into the terminal holding groove 25a from above through the slit 23a, and the central portion 14b abuts against the bulging portion 23, while the return portion 14f is hooked on the inner wall of the terminal holding groove 25a to restrict upward removal. During the process of inserting the press-fit terminal 14 into the terminal holding groove 25a, the coil restriction groove 25b restricts downward positional displacement of the lead wire 8a1, so that the lead wire 8a1 is forcibly fitted into the coil press-contact groove 14e, whereby the outer skin is stripped off and the lead wire 8a1 is electrically connected to the press-fit terminal 14. This connection structure has the advantage that when assembling the motor 1, the connection with the coil 8a can be completed simply by inserting the press-fit terminal 14 into the terminal holding groove 25a from above.

[0034] As described above, the board 15 is disposed in the board accommodation chamber 11, and is fastened by the screws 18 in a position where the bottom surface of the board 15 is in contact with each boss portion 13. The screws 18 correspond to the "joint member" and the "screw member" of the present invention. In this state, as shown in Figs. 8 and 9, the press-fit portion 14a of each press-fit terminal 14 is press-fitted and fixed in the through-hole 19 of the board 15. More specifically, the maximum width portion of each press-fit portion 14a is located in the through-hole 19, and the contact state with the through-hole 19 is maintained by the holding force generated by the friction between the press-fit portions 14a and the through-hole 19. The movement restricting portion 14c of each press-fit terminal 14 is in contact with the bottom surface of the board 15. The reason why two press-fit portions 14a are provided on one press-fit terminal 14 is to increase the conductive area with the board 15 and raise the upper limit of the allowable current value.

[0035] As a result, downward displacement of each press-fit terminal 14 is restricted by abutting its central portion 14b against the bulge 23 of the mounting base surface 9, and upward displacement is restricted by abutting the movement restricting portion 14c against the underside of the substrate 15.

[0036] In this embodiment, the central case 3 in which the above-mentioned three boss portions 13 are formed and the upper insulator 24 in which the six terminal holding portions 25 are formed constitute a "base member" of the present invention.

[0037] Next, the positional relationship between each press-fit terminal 14 and each boss portion 13 in a plan view will be described. As is well known, the number of press-fit terminals 14 and their arrangement in the circumferential direction around the axis C of the output shaft 6 are set based on the specifications of the motor 1, such as the number of poles. According to the specifications of the motor 1 of this embodiment, as shown in Figs. 3 and 4, six press-fit terminals 14 are arranged at intervals of 40° (indicated by angle α in Fig. 3) in the circumferential direction around the axis C. The three bosses 13 are arranged between adjacent pairs of press-fit terminals 14, and the boards 15 are fastened by screws 18 at the positions of these bosses 13. That is, the adjacent pairs of press-fit terminals 14 are restricted from upward positional displacement by abutting their respective movement restricting portions 14c against the lower surface of the board 15, but the board 15 is fastened by screws 18 at the midpoints of these movement restricting portions 14c, i.e., at close positions spaced circumferentially by 20° from the movement restricting portions 14c (indicated by angle α0 in Fig. 3), to prevent bending in the vertical direction.

[0038] For example, when the board 15 is fastened by the screw 18 at a position far away from the movement restricting portion 14c, the vertical displacement of the board 15 is restricted at the position of the screw 18, but the board 15 is bent and displaced in the vertical direction at the position of the movement restricting portion 14c. Each press-fit terminal 14 is subjected to a holding force due to friction generated between the press-fit terminal 14 and the through-hole 19, and the return portion 14f restricts the press-fit terminal 14 from being removed upward. However, when the press-fit terminal 14 is subjected to some kind of external force, for example, an external force caused by vibration, the press-fit terminal 14 is displaced while bending the board 15 upward via the movement restricting portion 14c. As a result, the narrower portion of the press-fit portion 14a is positioned inside the through-hole 19 and cannot maintain a normal contact state, which may cause a failure to normally energize the coil 8a due to poor electrical continuity.

[0039] As described above, in this embodiment, the board 15 is fastened with the screws 18 at a close position corresponding to the midpoint between the movement restricting portions 14c of a pair of adjacent press-fit terminals 14 to prevent bending in the vertical direction. Therefore, even if the press-fit terminals 14 are subjected to some external force and attempt to displace upward, the board 15 does not bend via the movement restricting portions 14c, preventing the press-fit terminals 14 from displacing upward. This makes it possible to maintain the press-fit portions 14a in the correct position within the through holes 19, and therefore allows current to flow through the coils 8a while maintaining a good contact state, thereby improving the reliability of the motor 1.

[0040] In particular, in this embodiment, a connection structure is adopted in which the lead wire 8a1 is forcibly fitted into the coil pressure contact groove 14e to connect the press-fit terminal 14 and the lead wire 8a1 of the coil 8a. Therefore, if the press-fit terminal 14 is displaced upward, the lead wire 8a1 may come off the coil pressure contact groove 14e, causing a contact failure. Therefore, compared with a structure in which the press-fit terminal 14 and the lead wire 8a1 are connected by a welding method such as fusing, this structure tends to be less reliable. However, the above-mentioned action prevents the press-fit terminal 14 from being displaced upward, so that the problems caused by this type of connection structure can be solved.

[0041] Furthermore, two press-fit portions 14a are provided on a central portion 14b of the press-fit terminal 14, and a movement restricting portion 14c is formed between them. The two press-fit portions 14a are originally arranged with a certain distance between them, so the movement restricting portion 14c is formed in the dead space between them. Therefore, the movement restricting portion 14c can be provided with almost no increase in the width of the press-fit terminal 14. Since there is little space to spare inside the board accommodating chamber 11, increasing the width of the press-fit terminal 14 can cause the motor 1 to become larger, but this can prevent such a problem from occurring.

[0042] Furthermore, the board 15 is fastened to each boss portion 13 with a screw 18. Therefore, the board 15 is firmly joined to each boss portion 13 to prevent bending, and furthermore, the upward positional displacement of the press-fit terminals 14 can be reliably prevented via the movement restricting portions 14c.

[0043] Furthermore, the bosses 13 are integrally formed on the mounting base surface 9 of the central case 3. Therefore, when the central case 3 is manufactured by injection molding or the like, the bosses 13 can be formed simultaneously with the injection molding of the central case 3 without adding a special process for providing the bosses 13, which contributes to reducing the manufacturing costs of the motor 1.

[0044] The present invention is not limited to the above-mentioned embodiment, and other examples 1 to 5 will be described below. [Example 1] In the above embodiment, the movement restricting portion 14c is formed between the two press-fit portions 14a of the press-fit terminal 14, but in this modified example 1, the movement restricting portions 14c are formed on both sides of the press-fit portion 14a. Fig. 11 is a sectional perspective view corresponding to Fig. 8 showing modified example 1.

[0045] As in the above embodiment, two press-fit portions 14a are formed on the central portion 14b, and movement restricting portions 14c are formed on both sides of these press-fit portions 14a. Although the width of the press-fit terminal 14 is slightly larger than that of the embodiment, the press-fit terminal 14 can be maintained in a more stable position. That is, since the press-fit terminal 14 of the embodiment has only one movement restricting portion 14c that abuts against the lower surface of the board 15, the position of the press-fit terminal 14 may change depending on the direction in which the external force is applied, and the press-fit terminal 14 may not be able to maintain a normal contact state with the through-hole 19. In this modification 1, since two movement restricting portions 14c spaced apart in the width direction abut against the lower surface of the board 15, the change in the position of the press-fit terminal 14 can be suppressed regardless of the direction in which the external force is applied, and thus the press-fit terminal 14 can maintain a normal contact state with the through-hole 19, thereby improving the reliability of the motor 1.

[0046] [Example 2] In this modification 2, instead of the modification 1, one press-fit portion 14a is provided. Fig. 12 is a cross-sectional perspective view showing the modification 2 and corresponding to Figs. One press-fit portion 14a is formed on the central portion 14b, and movement restricting portions 14c are formed on both sides of the press-fit portion 14a. In Fig. 12, the width of the press-fit terminal 14 is set to match the terminal holding portion 25 having the same shape as in the embodiment, but it is also possible to make each movement restricting portion 14c closer to the press-fit portion 14a. In that case, the width of the press-fit terminal 14 can be reduced, and the motor 1 can be made smaller.

[0047] [Example 3] In the above embodiment, the board 15 is fastened to each boss portion 13 with a screw 18, but in this modification 3, the board 15 is bonded to each boss portion 13 with an adhesive. Fig. 13 is a cross-sectional view corresponding to Fig. 7 showing modification 3.

[0048] After applying a quick-drying adhesive to each boss portion 13, the board 15 is placed in the board accommodation chamber 11 and left there. At this time, the board 15 is automatically maintained in a desired position centered on the axis C of the output shaft 6 because the press-fit portions 14a of the press-fit terminals 14 are press-fitted and fixed into the through holes 19 of the board 15. When the adhesive hardens to form a hardened layer 31, the board 15 is bonded to each boss portion 13 via the hardened layer 31. In this example, the hardened layer 31 of the adhesive interposed between each boss portion 13 and the board 15 corresponds to the "bonding member" of the present invention. As in the case of the screws 18, the board 15 can be firmly bonded to each boss portion 13 to prevent bending.

[0049] [Example 4] In place of the modified example 3, in this modified example 4, the upper case 4 is utilized to couple the substrate 15 to each boss portion 13. Fig. 14 is a cross-sectional view showing the modified example 4 and corresponding to Figs.

[0050] On the lower surface of the upper case 4, bosses 41 are provided at positions corresponding to the bosses 13, protruding downward, and the lower surface of each boss 41 is a flat pressing surface 41a. The board 15 is disposed in the board accommodation chamber 11, and the upper case 4 is joined to the central case 3 to close the opening. Each pressing surface 41a of the upper case 4 abuts against the upper surface of the board 15, sandwiching the board 15 between each boss 13 on the central case 3 side, thereby allowing the board 15 to be joined to each boss 13. The upper case 4 corresponds to the "cover member" of the present invention. In this modification 4, the fastening operation of the board 15 with the screw 18 is not necessary, so that the assembly work of the motor 1 can be simplified, and the manufacturing cost can be reduced.

[0051] [Example 5] In the above embodiment, the boss portions 13 are integrally provided on the mounting base surface 9 of the center case 3 to protrude therefrom, but in this modified example 5, they are formed as separate spacer members 51. Fig. 15 is a cross-sectional view corresponding to Fig. 7 showing modified example 5.

[0052] The spacer member 51 is cylindrical and is interposed between the mounting base surface 9 of the central case 3 and the substrate 15. The screws 18 penetrate the substrate 15 and the spacer member 51 and screw into the mounting base surface 9, thereby fastening the spacer member 51 and the substrate 15 onto the mounting base surface 9. For example, if the distance between the mounting base surface 9 and the substrate 15 changes due to a change in the specifications of the motor 1, in the embodiment in which the boss portions 13 are integrally formed with the central case 3, it is necessary to remake the molding die for the entire central case. In contrast, according to the modified example 5, the specification change can be accommodated simply by changing to a spacer member 51 with a different length, so that it is only necessary to remake a small molding die for the spacer member 51, which contributes to reducing manufacturing costs.

[0053] The aspects of the present invention are not limited to the above-mentioned embodiment and each of the other examples. For example, in the above-mentioned embodiment and each of the other examples, the boss portion 13 is disposed at the midpoint of the movement restriction portion 14c of the press-fit terminal 14 arranged at 40° intervals in the circumferential direction around the axis C as shown in FIG. 3 based on the specifications of the motor 1, that is, at a close position spaced apart by 20° in the circumferential direction, but the present invention is not limited to this. For example, in the motor 1 in which three press-fit terminals 14 are arranged at 120° intervals in the circumferential direction (shown by angle α in FIG. 16), as shown in FIG. 16, if the boss portion 13 is disposed at the midpoint of a pair of adjacent press-fit terminals 14, each press-fit terminal 14 will be spaced apart by 60° from the boss portion 13, and therefore the bending of the board 15 cannot be effectively restricted at the movement restriction portion 14c. Therefore, in such a case, similar to the above embodiment, for example, boss portions 13 may be individually formed at adjacent positions (indicated by angle α0 in Figure 16) spaced circumferentially from the movement restricting portion 14c of each press-fit terminal 14 by the equivalent of 20°.

[0054] In the above embodiment, the boss portions 13 are disposed between each pair of adjacent press-fit terminals 14, and as a result, the boss portions 13 are arranged side by side in the circumferential direction centered on the axis C of the output shaft 6. However, the boss portions 13 do not necessarily have to be arranged side by side in the circumferential direction. The boss portions 13 can be arranged in any position close to the press-fit terminals 14.

[0055] In the above embodiment, the control circuit and inverter circuit are mounted on the board 15 to drive and control the motor 1, but the function of the board 15 is not limited to this. For example, the board 15 may only have a relay function with an external controller, and the external controller may be provided with a control circuit and inverter circuit to drive and control the motor 1 via the board 15 and each press-fit terminal 14. [Explanation of symbols]

[0056] 1 Circuit integrated motor 2 Casing 3 Center case (base part) 4 Upper case (cover part) 6 Output shaft 7 Rotor 8 Stator 8a coil 13 Boss section 15 Substrate 14 Press-fit terminal 14a Pressfit section 14c Movement Control Section 18 Screws (connecting parts, screw parts) 19 Through Hole 24 Upper insulator (base material) 25 Terminal holding part 31 Hardened layer (bonding material) 41a Pressing surface 51 Spacer member

Claims

1. a base member provided on the casing, having insulating properties, the base member having a plurality of boss portions formed thereon, and a plurality of terminal holding portions arranged in parallel in a circumferential direction around an output shaft to which the rotor is fixed; a substrate connected to each of the boss portions of the base member by a connecting member with one side surface of the substrate being in contact with each of the boss portions of the base member; a plurality of press-fit terminals that are respectively held in the terminal holding portions of the base member and connected to the coils of each phase wound around the stator, and have press-fit portions at their tips press-fitted into through holes formed in the substrate to connect the coils of each phase to the substrate; In a circuit-integrated motor having Each of the press-fit terminals has a movement restricting portion that is integrally formed with the press-fit terminal and that abuts against one side surface of the board. The boss portions are disposed adjacent to the press-fit terminals. A circuit-integrated motor characterized by the above.

2. A drive control circuit for energizing the coils of each phase is mounted on the substrate, The press-fit terminals connect the coils of each phase to the drive control circuit of the substrate.

2. The circuit-integrated motor according to claim 1.

3. The movement restricting portions are formed on both sides of the press-fit portion.

2. The circuit-integrated motor according to claim 1.

4. Each of the press-fit terminals includes two of the press-fit portions, Each of the movement restricting portions is formed between the two press-fit portions.

2. The circuit-integrated motor according to claim 1.

5. The coupling member is a screw member that screws into the boss portion to fasten the substrate to the boss portion.

5. The circuit-integrated motor according to claim 1, wherein the motor is a rotor.

6. The joining member is a cured layer of adhesive interposed between the substrate and the boss portion.

5. The circuit-integrated motor according to claim 1, wherein the motor is a rotor.

7. The casing has an opening closed by a cover member, The coupling member is a plurality of pressing surfaces formed on the cover member corresponding to each of the boss portions, and sandwiches the substrate between the corresponding boss portions.

5. The circuit-integrated motor according to claim 1, wherein the motor is a rotor.

8. Each of the boss portions is provided between a pair of adjacent press-fit terminals, and is connected to the substrate by the connecting member.

5. The circuit-integrated motor according to claim 1, wherein the motor is a rotor.

9. Each of the boss portions is integrally provided on the base member.

5. The circuit-integrated motor according to claim 1, wherein the motor is a rotor.

10. Each of the boss portions is a spacer member disposed on the base member and sandwiched between the base member and the substrate.

5. The circuit-integrated motor according to claim 1, wherein the motor is a rotor.

Images