Motor and the bushing-like connector used for it

Abstract

Motor (1) comprising the following: a circuit board (10) connected to a coil of a stator; a plug-like connection area (20) formed in a part of the outer periphery of the circuit board (10) and exposed to the outside through an opening (34) formed in the housing (30); and a housing (30) in which the circuit board (10) is accommodated, and a socket-like connector (50) that can be connected to a cable and has a socket-like contact (60) that interacts with the plug-like connection area (20); wherein the socket-like connector (50) has the following: a connector housing (70) in which the socket-like contact (60) is housed; and a cover (80) in which the connector housing (70) is housed and which is fixed to the housing (30) of the motor, wherein the connector housing (70) is held by the cover (80) such that it is movable in a planar direction which is orthogonal to a direction in which the interaction with the plug-like connection area (20) takes place.

Description

[0001] The present invention relates to a motor and to a bushing-like connector used for this motor.

[0002] Traditionally, servomotors are used as drive sources in machine tools and the like. Generally, internal rotor motors are used as such servomotors. An example of an internal rotor motor is the one described in patent document 1.

[0003] The motor described in patent document 1 has a rotatably mounted rotor and a stator arranged externally to the rotor. The stator comprises a stator core, an insulator covering the stator core, and coils wound around a plurality of teeth of the stator core. The stator coils are connected to a circuit board attached to the insulator. A connector for external power supply is also attached to the circuit board.

[0004] A cable connector, which is connected to a power supply cable from an external power supply device, is then engaged with this external power supply connector, and power is supplied to the motor via the external power supply connector.

[0005] Patent document 2 describes an external rotor motor with a rotor and a stator, as well as a printed circuit board (PCB) arranged between the motor winding and the motor flange. The PCB has printed conductor tracks that are connected to the winding ends of the motor winding and to an externally inserted connecting cable. The connection between the connecting cable and the conductor tracks of the PCB is designed as a connector that can be attached to the outer edge of the PCB. [Patent Document 1] JP 2011-167054 A [Patent document 2] DE 34 26 973 C2

[0006] However, the conventional motor described in patent document 1 presented the following problems. In particular, the number of components was high, as a cable connector and an external power supply connector were required on the motor side to connect a power supply cable and a motor-side circuit board. Furthermore, not only was the number of components large, but the assembly man-hours were also significant due to the need to mount the motor-side external power supply connector on the circuit board.

[0007] For this reason, the present invention has been developed to solve these prior art problems, and the objective of the present invention is to create a motor and a socket-like connector used for this motor, which reduce the number of components and the number of assembly man-hours when connecting a cable and a motor-side circuit board.

[0008] To achieve the objective described above, a motor according to one aspect of the present invention is characterized in that it has the following: a circuit board connected to a coil of a stator; a plug-like connection area formed in a part of the outer periphery of the circuit board; and a housing in which the circuit board is received, wherein the plug-like connection area is exposed to the outside through an opening formed in the housing and a socket-like connector connected to a cable can engage with or interact with the plug-like connection area.

[0009] Furthermore, according to another aspect of the present invention, a socket-like connector is the socket-like connector used for the aforementioned motor, which is characterized in that it is connected to the cable and has a socket-like contact that interacts with the plug-like connection area.

[0010] In the motor and the socket-like connector used for this motor according to the present invention, a plug-like connection area is provided, which is formed in a part of the outer periphery of the circuit board. The plug-like connection area is exposed to the outside through an opening formed in a housing, and a socket-like connector connected to a cable can interact with the plug-like connection area. When connecting the cable and the motor-side circuit board, it is therefore sufficient to engage the socket-like connector with the plug-like connection area formed in a part of the outer periphery of the circuit board, and it is not necessary to provide a connector on the motor-side circuit board. This reduces the number of components and also the number of working hours required for assembly.Assembly man-hours can be reduced, as no work needs to be carried out to mount a connector on the motor-side circuit board.

[0011] The drawings show: Fig. 1 a perspective view of a state in which a socket-like connector interacts with a plug-like connection area of ​​a motor according to the present invention and the socket-like connector is attached to the motor; Fig. 2 a perspective view of a state in which the motor and the bushing-like connector of the Fig. 1 have been separated; Fig. 3 Another perspective view of a state in which the motor and the bushing-like connector of the Fig. 1 have been separated; Fig. 4 A rear view of a state in which the motor and the bushing-like connector of the Fig. 1 have been separated; Fig. 5 a sectional view along line 5-5 in Fig. 4; Fig. 6 a perspective view showing a longitudinal section of the motor and the bushing-like connector of the Fig. 1; Fig. 7 a perspective view of the in Fig. 1. Motor shown when viewed from the side of the front surface; Fig. 8 a perspective view of the in Fig. 1. Bushing-like connector shown when viewed from the side of the base surface; Fig. 9 a stretched perspective view of the in Fig. 1 shown socket-like connector; Fig. 10 a stretched perspective view of the in Fig. 1. Bushing-like connector shown when viewed from the side of the base surface; Fig. 11 a floor view of the in Fig. 1 shown socket-like connector; Fig. 12 a sectional view along line 12-12 in Fig. 11; and Fig. 13 a sectional view along line 13-13 in Fig. 11.

[0012] An embodiment of the present invention is described below with reference to the drawings.

[0013] Fig. Figure 1 illustrates a state in which a socket-like connector 50 is connected to a plug-like connection area 20 of a motor 1 (see Figure 1). Fig. 2) interacts and the bushing-like connector 50 is attached to the motor 1.

[0014] At the in Fig. The motor 1 shown in Figure 1 is an internal rotor motor, comprising a stator (not shown), a rotor (not shown), coils or windings (not shown) extending from the stator to the outside, and a circuit board 10 connected to the stator coils. The stator, rotor, coils, and circuit board 10 are housed inside a casing 30.

[0015] The housing 30 is essentially a cuboid metal element having a front surface 30a, a rear surface 30b, a right side surface 30c, a left side surface 30d, a top surface 30e, and a bottom surface 30f. A through-opening 31, extending from the front surface 30a to the rear surface 30b, is formed in the housing 30. The stator, rotor, coils, and circuit board 10 are accommodated in the through-opening 31 of the housing 30.

[0016] A mounting area 32, having a substantially rectangular shape when viewed from above, is formed on the upper surface 30e of the housing 30 such that it projects away from the upper surface 30e, as shown in Fig. 1 to Fig. Figure 7 shows that the mounting area 32 need not project from the upper surface 30e of the housing 30. Four internally threaded areas 33 for mounting the bushing-like connector 50 are formed, for example, at the four corners of the mounting area 32, as shown in Figure 7. Fig. 2, Fig. 3 and Fig. Figure 7 shows that the socket-like connector 50 is attached to the mounting area 32 by means of four externally threaded screws 95. Fig. 1 and Fig. Figure 6 is shown. It should be noted that the number of internally threaded areas 33 and externally threaded screws 95 can also be two, six, or the like. A rectangular opening 34, extending from the upper surface of the mounting area 32 to the through-hole 31 in the housing 30, is formed in a central area when viewing this mounting area 32 from above, as shown in Figure 6. Fig. 2, Fig. 3 as well as Fig. 5 to Fig. Figure 7 is shown. It should be noted that the opening 34 can also have a shape other than a rectangular one, such as an irregular shape.

[0017] The circuit board 10 is designed in the form of a ring-shaped plate and is attached to an end face of the stator. As shown in Fig. As shown in Figure 5, the circuit board 10 is housed inside the casing 30 such that the front surface of the circuit board 10 faces the side of the front surface 30a of the casing 30, and the rear surface of the circuit board 10 faces the side of the rear surface 30b of the casing 30. The stator coils are formed from a U-phase coil, a V-phase coil, and a W-phase coil. End regions of the U-phase coil, the V-phase coil, and the W-phase coil are each connected to a plurality of conductor regions (not shown) provided on the circuit board 10. Furthermore, the plug-like connection region 20 is formed in a part of the outer periphery of the circuit board 10, namely in the upper end region of the outer periphery of the circuit board 10 in the present embodiment, as shown in the figures. Fig. 2 to Fig. Figure 7 shows the connector-like connection area 20. This connector is integrally formed with the circuit board 10 and has the same thickness, so that it projects upwards from the upper end of the outer periphery of the circuit board 10. It should be noted that the connector-like connection area 20 does not necessarily have to project away from the outer periphery of the circuit board 10. The connector-like connection area 20 is a plate area that, when viewed from the side of the front surface (the side of the front surface 30a of the housing 30), is essentially rectangular. A plurality of (six in the present embodiment) electrically conductive contact surfaces 20a are formed on this connector-like connection area 20 such that they are exposed on the front and rear surfaces of the connector-like connection area 20.The majority of the electrically conductive connection surfaces 20 are each connected to the majority of the conductor areas provided on the circuit board 10, to which the end regions of the U-phase coil, the V-phase coil, and the W-phase coil are each connected. In the present embodiment, the multiple electrically conductive connection surfaces 20a are formed by two connection surfaces for braking, one connection surface for grounding, and three connection surfaces for the U-phase coil, the V-phase coil, and the W-phase coil.

[0018] The plug-like connection area 20 is free from the opening 34 formed in the housing 30, as shown in Fig. 2, Fig. 3 as well as Fig. 5 to Fig. Figure 7 shows that the circuit board 10 is attached to the end face of the stator such that the upper end of the plug-like connection area 20 is positioned slightly below the upper surface of the mounting area 32, as shown in Figure 7. Fig. 5 is shown.

[0019] Furthermore, the socket-like connector 50 is formed with a plurality of (six in the present embodiment) socket-like contacts 60, which interact with the plug-like connection area 20, with a connector housing 70 that accommodates these socket-like contacts 60, and with a cover 80 that accommodates the connector housing 70, as shown in Fig. 5 as well as in Fig. 8 to Fig. 13 is shown.

[0020] The socket-like contacts 60 are formed by stamping and forming an electrically conductive metal flat body and are provided with a fixing area 61 which is fixed to the connector housing 70, as shown in Fig. 5, Fig. 9, Fig. 10 and Fig. Figure 13 shows the fixing area 61 as box-shaped. A contact tongue 64 is located on the lower wall (the right wall in the figure). Fig. 5) of the sizing area 61, as provided for in Fig. 5 and Fig. Figure 13 shows the socket-like contacts 60. These contacts are each received inside contact receiving chambers 71, which will be described below and are formed in the connector housing 70. The socket-like contacts 60 are secured in the connector housing 70 by the contact tongues 64 engaging with locking areas 73 provided in the connector housing 70.

[0021] Furthermore, each socket-like contact 60 is provided with a pair of contact arms 61a and 61b, each extending from the front ends (the lower ends in Fig. 5) extend away from the upper wall and the lower wall of the fixing area 61. When the socket-like contacts 60 interact with the plug-like connecting area 20, the plug-like connecting area 20 is accommodated between the pairs of contact arms 61a and 61b, as shown in Fig. Figure 6 shows that each pair of contact arms 61a and 61b is elastically deformed and comes into contact with the electrically conductive contact surfaces 20a, which are exposed on the front and rear surfaces of the plug-like connection area 20.

[0022] Furthermore, each socket-like contact 60 is provided with a core wire sleeve 62 and an insulating sleeve 63 extending from the rear end (the upper end in Fig. 5) extend away from the lower wall of the fixing area 61. The core wire sleeves 62 of the socket-like contacts 60 create a crimp connection with the core wire of each electrical wire (not shown) of a power supply cable or power supply cable C (see Fig. 5), and the insulating sleeves 63 are used for crimping onto the sheathing of each electrical wire of the power supply cable C.

[0023] Furthermore, the connector housing 70 has an essentially cuboid shape, as shown in the Fig. 8 to Fig. 10 is shown, wherein it is formed by molds made of an insulating synthetic resin material. Furthermore, the connector housing 70 is provided with a plurality of (six in the present embodiment) contact receiving chambers 71 in which the several socket-like contacts 60 are each received, as shown in Fig. 5, Fig. 9 and Fig. Figure 13 shows that the multiple contact chambers 71 are formed with a predetermined center-to-center spacing in the longitudinal direction of the connector housing 70. Each contact chamber 71 is located at the rear end face (the upper end face in Fig. 5) of the connector housing 70 is open and extends towards the front of the connector housing 70. Furthermore, the locking areas 73 for securing the socket-like contacts 60 received in the contact receiving chambers 71 are also provided in sections corresponding to the contact receiving chambers 71 of the lower wall (the right wall in Fig. 5) of the connector housing 70.

[0024] Furthermore, a rectangular guide opening 72, sized to accommodate the plug-like connection area 20, is provided on the front end face of the connector housing 70, as shown in Fig. 5, Fig. 8, Fig. 11 and Fig. Figure 13 shows the guide opening 72 extending from the front end face of the connector housing 70 towards the contact chambers 71. Furthermore, pairs of inclined guide surfaces 75c and 75d are located at the upper edge (the left edge in Figure 13). Fig. 5) and the lower edge of an inlet formed at the front edge to the guide opening 72, as shown in Fig. 5, Fig. 11 and Fig. Figure 13 shows a pair of inclined guide surfaces 75a and 75b at the left end (the left end in Fig. 11) and the right end in the longitudinal direction of the entrance formed at the front edge to the guide opening 72, as shown in Fig. 11 and Fig. 12 is shown.

[0025] Furthermore, a pair of locking projections 74a and 74b are located on the left side face (the left side face in Fig. 11) and the right side surface in the longitudinal direction of the connector housing 70, as shown in Fig. 9 to Fig. Figure 12 shows that the locking projections 74a and 74b extend outwards from the left and right side surfaces, respectively, and engage with locking projections 82a and 82b of the cover 80 described below, as shown in Fig. Figure 12 shows that the locking projection 74a on the left side is provided with an inclined surface 74aa, an outer surface 74ab and a front end surface 74ac, as shown in Figure 12. Fig. Figure 12 shows that the inclined surface 74aa extends obliquely outward and forward from the left side face of the connector housing 70, and the outer surface 74ab extends parallel to the left side face and forward from the outer end of the inclined surface 74aa. The front end surface 74ac extends from the front end of the outer surface 74ab such that it is perpendicular to the left side face and engages with the rear surface of the locking projection 82a of the cover 80 to prevent it from disengaging toward the front of the connector housing 70. Furthermore, a locking projection 74b on the right side is provided with an inclined surface 74ba, an outer surface 74bb, and a front end surface 74bc, as shown in Figure 12. Fig. Figure 12 shows that the inclined surface 74ba extends obliquely outwards and forwards from the right side face of the connector housing 70, and the outer surface 74bb extends parallel to the right side face and forwards from the outer end of the inclined surface 74ba. The front end surface 74bc extends away from the front end of the outer surface 74bb such that it is perpendicular to the right side face and engages with the rear surface of the locking projection 82b of the cover 80 to prevent it from disengaging towards the front of the connector housing 70.

[0026] Furthermore, the cover 80, which accommodates the connector housing 70, has an essentially cuboid shape, as shown in the Fig. 8 to 10, and is formed by molds made of synthetic resin. A housing receiving chamber 81, which receives the connector housing 70, is formed in this cover 80, as shown in Fig. 5, Fig. 8, Fig. 10, Fig. 12 and Fig. Figure 13 shows the housing receiving chamber 81 on the front surface (the lower surface in the figure). Fig. 5) the cover 80 is open and extends towards the rear of the cover 80. The left and right side walls (which are in Fig. The 12 side walls arranged on the left and right of the cover 80 are each formed from a first side wall area 80a, a second side wall area 80b and a third side wall area 80c, as shown in Fig. Figure 12 shows the first side wall section 80a extending forward from the rear wall of the cover 80, and the second side wall section 80b extending laterally outwards and forwards from the front end of the first side wall section 80a. The third side wall section 80c extends forwards from the front end of the second side wall section 80b. The housing receiving space 81 is bounded laterally by the first side wall sections 80a, the second side wall sections 80b, and the third side wall sections 80c. Furthermore, on the left side of the third side wall section 80c, the locking projection 82a, with which the locking projection 74a of the connector housing 70 engages, projects laterally inwards from the third side wall section 80c.Furthermore, on the third side wall region 80c, the locking projection 82b, with which the locking projection 74b of the connector housing 70 engages in a locking action, is formed and projects laterally inwards from the third side wall region 80c. Additionally, on the first side wall region 80a, a stop step region 80f, which regulates a rearward movement of the connector housing 70 received inside the housing receiving space 81, is formed and projects laterally inwards on both the left and right sides. It should be noted that the outer surface of the second side wall region 80b can extend linearly upwards without any change compared to the outer surface of the third side wall region 80c.

[0027] Next, with reference to Fig. 12 The dimensions of the housing receiving space 81 and the connector housing 70 are considered in the direction of the lateral width when the connector housing 70 is received in the housing receiving space 81 in a normal state. In this case, the dimensions are specified such that a gap δ1 is formed between the outer surface 74ab of the locking projection 74a on the left side of the connector housing 70 and the inner surface 80d of the third side wall region 80c of the cover 80. On the opposite side, the dimensions are provided such that a gap δ1 is formed between the outer surface 74bb of the locking projection 74b on the right side of the connector housing 70 and the inner surface 80d of the third side wall region 80c of the cover 80.Furthermore, the dimensions are such that a gap δ1 is formed between the left side surface of the connector housing 70 and the inner surface 80e of the first side wall region 80a of the cover 80. On the opposite side, the dimensions are such that a gap δ1 is formed between the right side surface of the connector housing 70 and the inner surface 80e of the first side wall region 80a of the cover 80. The dimensions of the connector housing 70 and the housing receiving space 81 are thus such that a total of 2δ1 gaps are formed in the direction of the lateral width between the connector housing 70 and the left and right side walls of the cover 80.

[0028] With reference to Fig. 11 and Fig. 13. The dimensions in the vertical direction of the housing receiving space 81 and the connector housing 70 are now considered in the case where the connector housing 70 is accommodated in the housing receiving space 81 in a normal state. Here, the dimensions are specified such that a gap δ2 is formed between the upper surface 70a of the connector housing 70 and the inner surface 80h of an upper wall 80g of the cover 80. On the opposite side, the dimensions are specified such that a gap δ2 is formed between the lower surface 70b of the connector housing 70 and the inner surface 80i of the housing receiving space 81 of the cover 80. Thus, the dimensions of the connector housing 70 and the housing receiving space 81 are specified such that a total of 2δ2 gaps are formed in the vertical direction between the connector housing 70 and the inner surface 80h and the inner surface 80i of the cover 80.

[0029] Thus, the dimensions of the connector housing 70 and the housing receiving space 81 are designed such that a total of 2δ1 gaps are formed in the lateral direction between the connector housing 70 and the left and right side walls of the cover 80. Furthermore, the dimensions of the connector housing 70 and the housing receiving space 81 are designed such that a total of 2δ2 gaps are formed in the vertical direction between the connector housing 70 and the inner surface 80h and the inner surface 80i of the cover 80. Thus, the connector housing 70 is held by the cover 80 in such a way that it can move in the lateral direction as well as in the vertical direction.Here, the direction of the lateral width and the vertical direction of the connector housing 70 correspond to planar directions that are orthogonal to the direction in which an engagement with the plug-like connection area 20 takes place on the side of the motor 1, as shown in . Fig. 5 and Fig. Figure 6 is shown. Thus, the connector housing 70 is held by the cover 80 in such a way that it can move in planar directions that are orthogonal to the direction in which the engagement or interaction with the plug-like connection area 20 takes place.

[0030] Furthermore, a mounting flange 83 is provided on both the upper wall 80g and the lower wall of the cover 80 such that it projects outwards from the upper wall 80g and the lower wall. A total of four mounting screw through-holes 84 are formed at the two longitudinally located corner areas of each mounting flange 83.

[0031] Furthermore, a cable opening 85a is formed in the lower wall of the cover 80 for inserting the power supply cable C, as shown in Fig. 5, Fig. 6, Fig. 10 and Fig. Figure 13 shows that a cylindrical area 85, surrounding the cable opening 85a, projects downwards from the lower wall of the cover 80. A threaded area 86 is formed on the outer circumference of the cylindrical area 85, and a plurality of ribbed areas 87 are formed at regular intervals around the outer end of the cylindrical area 85. It should be noted that the ribbed areas 85 are not required. A cylindrical waterproof rubber area 89 is then inserted on the inner circumferential side of the cylindrical area 85, as shown in Figure 13. Fig. 5, Fig. 6, Fig. 9, Fig. 10 and Fig. Figure 13 shows that a threaded section 91 of a fastening element 90 for the waterproof rubber section is screwed to the threaded section 86 on the outer circumferential side of the cylindrical section 85. The inner diameter of the waterproof rubber section 89 corresponds approximately to the diameter of the cable opening 85a, as shown in Figure 13. Fig. 5, Fig. 6 and Fig. Figure 13 illustrates this. When the power supply cable C is attached, the free end of the power supply cable C is inserted through an inner through-hole of the waterproof rubber area 89 and positioned in the cable opening 85a, as shown in Figure 13. Fig. Figure 5 shows that screwing the fastening element 90 for the waterproof rubber section onto the cylindrical section 85 causes the waterproof rubber section 89 to press firmly against the power supply cable C from the outer circumferential side of the power supply cable C. The space between the waterproof rubber section 89 and the power supply cable C is thus sealed.

[0032] Furthermore, an annular recess area 88 is formed in the front end surface of the cover 80 such that it surrounds the opening in the housing receiving area 81, as shown in Fig. 8 and Fig. Figure 10 shows a ring-shaped waterproof sealing element 94, which is then fitted into this recess area 88.

[0033] Next, a method for assembling the bushing-like connector 50 and a method for attaching the assembled bushing-like connector 50 to the motor 1 are described with reference to Fig. 5, Fig. 6 and Fig. 12 described.

[0034] First, the free end of the power supply cable C is passed through the fastening element 90 for the waterproof rubber area and through the inner through-hole of the waterproof rubber area 90 and inserted into the cable opening 85a in the cover 80.

[0035] Next, the electrical wires of the power supply cable C are connected by crimping to the wire core sleeves 62 and the insulating sleeves 63 of the socket-like contacts 60.

[0036] The socket-like contacts 60 are then inserted into the contact receiving chambers 71 from the rear of the connector housing 70, with the pairs of contact arms 61a and 61b leading the way. The contact tongues 64 of the socket-like contacts 60 are thereby locked to the locking areas 73 of the connector housing 70, thus securing the socket-like contacts 60 to the connector housing 70.

[0037] Next, as in Fig. As shown in Figure 12, the connector housing 70 is inserted into the housing receiving space 81 from the front of the cover 80, with the rear end of the connector housing 70 leading the way. This causes the locking projections 74a and 74b of the connector housing 70 to move over the locking projections 82a and 82b of the cover 80, and the connector housing 70 is locked to the cover 80. Rearward movement of the connector housing 70 is prevented by the rear end of the connector housing 70 bearing against the stop stepped areas 80f of the cover 80. Furthermore, forward movement of the connector housing 70 is prevented by the front end surfaces 74ac and 74bc of the locking projections 74a and 74b of the connector housing 70 bearing against the rear surface n of the locking projections 82a and 82b of the cover 80.

[0038] The subsequent screwing of the fastening element 90 for the waterproof rubber section onto the cylindrical section 85 results in the waterproof rubber section 89 pressing firmly against the power supply cable C from the outer circumferential side of the power supply cable C. The power supply cable C is thus attached to the socket-like connector 50 in such a way that the space between the waterproof rubber section 89 and the power supply cable C is sealed.

[0039] The waterproof sealing element 94 is then fitted into the recess area 88 of the cover 80, and this completes the assembly of the socket-type connector 50.

[0040] In the socket-like connector 50 mounted in this manner, the front end face of the cover 80 and the front end face of the connector housing 70 point downwards, as shown in Fig. 5 is shown. In this state, the socket-like connector 50 is moved downwards, and the free end of the connector housing 70 is inserted into the opening 34 formed in the housing 30 of the motor 1, as shown in Fig. Figure 6 illustrates this. The plug-like connection area 20 on the motor 1 side extends through the guide opening 72 in the connector housing 70 and is received between the pairs of contact arms 61a and 61b of the socket-like contacts 60. This results in elastic deformation of the contact arm pairs 61a and 61b, which then come into contact with the electrically conductive contact surfaces 20a exposed on the front and rear surfaces of the plug-like connection area 20. Consequently, the electrically conductive contact surfaces 20a are positioned between the contact arm pairs 61a and 61b. As a result, the circuit board 10 on the motor 1 side and the power supply cable C are connected via the plug-like connection area 20 and the socket-like contacts 60.Since the pairs of contact arms 61a and 61b come into contact with the electrically conductive contact surfaces 20a, which are exposed on the front surface and the rear surface of the plug-like connection area 20, the contact reliability can be increased compared to the case in which only one contact arm comes into contact with an electrically conductive contact surface 20a.

[0041] In this way, in the motor 1 and the socket-like connector 50 according to the present embodiment, the plug-like connection area 20 is provided such that it is formed in a part of the outer periphery of the circuit board 10, and the plug-like connection area 20 is freely accessible from the opening 34 formed in the housing 30 on the side of the motor 1. Furthermore, the socket-like connector 50 connected to the power supply cable C is able to interact with the plug-like connection area 20.When the power supply cable C and the circuit board 10 are connected on the motor 1 side, it is sufficient to engage the socket-like connector 50 with the plug-like connection area 20, which is formed in a part of the outer periphery of the circuit board 10. There is no need to provide a connector on the circuit board 10 on the motor 1 side. Thus, the number of components can be reduced, and since no assembly work is required to mount the connector on the circuit board 10 on the motor 1 side, the number of assembly man-hours can be reduced.

[0042] After the socket-like connector 50 has been engaged with the plug-like connection area 20 on the side of the motor 1, four fastening screws 95 are then inserted into the fastening screw through-holes 84 of the cover 80 together with O-rings 96 and screwed onto the internally threaded areas 33 on the side of the motor 1, as shown in Fig. Figure 1 shows the cover 80 of the bushing-like connector 50 being attached to the motor 1. At this point, the waterproof sealing element 94 on the side of the bushing-like connector 50 is seated on the mounting area 32 on the side of the motor 1, as shown in Figure 1. Fig. Figure 6 shows that the space between the cover 80 of the bushing-like connector 50 and the mounting area 32 of the housing 30 of the motor 1 is thereby sealed. It should be noted that the O-rings 96 are not required.

[0043] Furthermore, it should be noted that on the side of the motor 1, when the circuit board 10 is housed in the through-opening 31 of the housing 30, the positions of the circuit board 10 and the plug-like connection area 20 often shift in a direction orthogonal to the direction in which the socket-like connector 50 engages with the plug-like connection area 20.

[0044] In the socket-like connector 50 according to the present embodiment, as mentioned above, the connector housing 70 is held by the cover 80 such that it can move in planar directions orthogonal to the direction in which the engagement with the plug-like connection area 20 takes place. Even if the position of the plug-like connection area 20 shifts in a direction orthogonal to the direction of engagement, the connector housing 70 can follow the movement of the plug-like connection area 20 when the free end of the connector housing 70 is inserted into the opening 34.

[0045] Even if the position of the plug-like connection area 20 shifts in a direction orthogonal to the direction of engagement, the plug-like connection area 20 thus passes through the guide opening 72 in the connector housing 70 and is received in a suitable manner between the pairs of contact arms 61a and 61b of the socket-like contacts 60.

[0046] Here, the pairs of inclined guide surfaces 75c and 75d are each located at the upper edge (the left edge in Fig. 5) and the lower edge of the inlet to the guide opening 72 located at the front edge in the connector housing 70, as shown in Fig. 5 is shown. Furthermore, the pair of inclined guide surfaces 75a and 75b is located at the left end (the left end in Fig. 11) and the right end in the longitudinal direction of the entrance to the guide opening 72 located at the front edge, as shown in Fig. 11 and Fig.Figure 12 illustrates this. That is, the inclined guide surfaces 75a and 75b, as well as 75c and 75d, are formed at edges in directions orthogonal to the direction of engagement at the entrance to the guide opening 72 of the connector housing 70. If the position of the plug-like connection area 20 has shifted in a direction orthogonal to the direction of engagement, the outer end of the plug-like connection area 20 rests either against the pair of inclined guide surfaces 75c and 75d or against the pair of inclined guide surfaces 75a and 75b of the guide opening 72. In this way, the connector housing 70 can easily follow the plug-like connection area 20 when it moves.

[0047] An embodiment of the present invention has been described above; however, the present invention is not limited to this embodiment, and various modifications and improvements can be made.

[0048] For example, a case has been described in which the power supply cable C is attached to the socket-like connector 50. However, the socket-like connector 50 can also be shipped to a customer in a state in which the connector housing 70, containing the plurality of socket-like contacts 60, is held by the cover 80, and the power supply cable C can be connected by this customer to the socket-like contacts 60.

[0049] Furthermore, it is sufficient that the plug-like connection area 20 is formed in a part of the outer periphery of the circuit board 10 and is exposed by the opening 34 formed in the housing 30, without it being necessary that the plug-like connection area 20 is formed in the upper end region of the outer periphery of the circuit board 10.

[0050] Furthermore, the circuit board 10 does not need to have a ring-shaped form.

[0051] Furthermore, in the case of the socket-like contacts 60, in addition to pairs of contact arms 61a and 61b which come into contact with the electrically conductive contact surfaces 20a, there may also be only one contact arm, and this contact arm may come into contact with a surface of an electrically conductive contact surface 20a.

[0052] Furthermore, the locking projections of the connector housing 70 can also be in the form of a housing tongue supported on one side.

[0053] Furthermore, the socket-like connector according to the present invention can be used not only for supplying electrical current to a motor, but also for transmitting signals to an encoder circuit. In such a case, a signal transmission cable is used instead of a power supply cable. Reference symbol list 1 engine 10 circuit board 20 plug-like connection area 30 cases 34 Opening 50 socket-type connectors 60 socket-type contacts 70 connector housings 80 coverage C Power supply cable (cable)

Claims

[1] Engine (1) comprising: a circuit board (10) connected to a coil of a stator; a plug-type connection portion (20) formed in a part of the outer periphery of the circuit board (10) and exposed to the outside through an opening (34) formed in the housing (30); and a housing (30) in which the circuit board (10) is accommodated, and a socket-type connector (50) connectable to a cable and having a socket-type contact (60) cooperating with the plug-type connection portion (20); wherein the socket-type connector (50) comprises: a connector housing (70) in which the socket-like contact (60) is housed; and a cover (80) in which the connector housing (70) is housed and which is fixed to the housing (30) of the motor, wherein the connector housing (70) is held by the cover (80) such that it is movable in a planar direction which is orthogonal to a direction in which the interaction with the plug-like connection portion (20) takes place.

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