JP2008236995A - Motor apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor apparatus capable of allowing a ground terminal to contact the inner surface of a gear housing, while assuring sealing performance of the gear housing. <P>SOLUTION: A wiper motor 10 comprises a yoke housing 20 in which an armature 22 is housed rotatably; a gear housing 52 for housing a worm wheel 58 and a worm 56 to be rotated by the armature 22; a brush holder 30 which holds brushes 32 and 33 to supply power to the armature 22, sandwiched between the yoke housing 20 and the gear housing 52; a contact plate 50 which is connected to the internal wiring of the brush holder 30, while being slidably contacted to a movable conductive plate 68 of the worm wheel 58; and a ground terminal member 120 which together with the contact plate 50, elastically contacts a hole wall 55A of a communication hole 55, in which the contact plate 50 is inserted, at the gear housing 52 connected to the internal wiring. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a motor device configured by sandwiching a brush holder between a yoke housing and a gear housing.

In a motor device that outputs rotation through a speed reduction mechanism such as a wiper motor or a power window motor, the speed reduction mechanism section includes a position detection section for detecting the rotational position of the motor, and a negative electrode that constitutes the position detection section A technique is known in which a terminal portion is electrically connected to a gear housing and grounded (see, for example, Patent Document 1). In this technique, the ground contact portion that is integrally extended from the negative electrode terminal portion is sandwiched between the gear housing and the cover, and the fixing portion formed at the end of the ground contact portion is fastened to the gear housing and the cover together. It is supposed to be.
JP-A-11-150910

  By the way, in a motor device having a position detection unit, it is required to ensure a sealing property so as to prevent water from entering the gear housing. However, in the conventional technology as described above, the ground contact unit has a gear housing and a cover. Therefore, special measures are required to ensure the required sealing performance, which is a factor in increasing costs.

  An object of the present invention is to obtain a motor device capable of bringing a ground terminal into contact with the inner surface of the gear housing while ensuring the sealing performance of the gear housing in consideration of the above facts.

  According to a first aspect of the present invention, there is provided a motor device comprising: a yoke housing that rotatably accommodates an armature; a first gear that is rotated by the armature; and a movable conductive plate that is meshed with the first gear and has one end surface. A gear housing that houses a second gear that is provided to rotate integrally; and a brush that is sandwiched between the yoke housing and the gear housing to supply power to the armature, and at least a part thereof Is connected to the conducting member at one end through a communication hole that communicates the inside and outside of the accommodating portion in the gear housing in the direction of the rotation axis of the armature. One end protrudes into the second gear housing space in the gear housing, and the other end is movable. A contact member that is slidably contacted with the electric plate, and a ground terminal that is formed or connected to the conducting member or the contact member and elastically contacts the hole wall of the communication hole or the inner surface of the housing portion in the gear housing And.

  In the motor device according to the first aspect, power is supplied to the armature through the conducting member held by the brush holder, and the armature rotates. The rotation of the armature is transmitted to the output unit via the first gear and the second gear. At this time, the movable conductive plate rotates together with the second gear, and the contact member changes the position of relative contact with the movable conductive plate (there may be a non-contact portion), for example, information on rotation of the motor device is obtained. It is done.

  Here, in this motor device, since the ground terminal is in elastic contact with the hole wall of the communication hole for inserting the contact member in the gear housing or the inner surface of the housing portion of the second gear, in other words, the ground terminal is Since the gear housing is in contact with a portion that is not a joint (boundary) portion with another member, the contact of the ground terminal does not affect the sealing performance of the gear housing.

  Thus, in the motor device according to the first aspect, the ground terminal can be brought into contact with the inner surface of the gear housing while ensuring the sealability of the gear housing.

  A motor device according to a second aspect of the present invention is the motor device according to the first aspect, wherein the grounding terminal is configured as a separate member from the conducting member.

  In the motor device according to claim 2, since the conducting member and the ground terminal are separate members, for example, in each configuration in which the arrangement of the ground terminal is different, the conducting member held by the brush holder may be shared. It becomes possible.

  A motor device according to a third aspect of the present invention is the motor device according to the second aspect, wherein the ground terminal is made of a material having a good spring property with respect to the constituent material of the conducting member.

  In the motor device according to claim 3, the ground terminal has a favorable spring property as compared with the conducting member (when the same size and shape are formed, the restoring force is large or the displacement range that behaves as a linear spring is wide. Therefore, a favorable grounding performance can be obtained as compared with a configuration in which a grounding terminal is integrally provided on the conducting member.

  A motor device according to a fourth aspect of the present invention is the motor device according to the second or third aspect, wherein the conductive member is formed with a plurality of connection portions to which the contact member can be connected, and the grounding The terminal is connected to one of the plurality of connecting portions alone or together with the contact member.

  In the motor device according to the fourth aspect, the ground terminal is connected to the connection portion according to the specification among the plurality of connection portions in the conductive member. Thereby, for example, in each configuration in which the arrangement of ground terminals, the number and arrangement of contact members are different, it is possible (easily) to share the conductive member held by the brush holder.

  The motor device according to a fifth aspect of the present invention is the motor device according to any one of the first or fourth aspects, wherein the ground terminal is configured as a separate member from the contact member. It is connected to the conducting member.

  In the motor device according to the fifth aspect, since the ground terminal is separated from the contact member, for example, in a configuration in which a plurality of contact members are provided, each contact member can be shared.

  A motor device according to a sixth aspect of the present invention is the motor device according to any one of the second to fourth aspects, wherein the ground terminal is formed integrally with the contact member.

  In the motor device according to the sixth aspect, the number of parts (the number of assembling steps) is prevented from increasing by the amount corresponding to the ground terminal.

  A motor device according to a seventh aspect of the present invention is the motor device according to the sixth aspect, wherein the ground terminal is formed by cutting and raising a part of the contact member.

  In the motor device according to the seventh aspect, since the ground terminal is formed by cutting and raising a part of the contact member, a contact member having no ground terminal can be obtained by not cutting and raising the cut and raised part. That is, the contact member can be shared regardless of the presence or absence of the ground terminal.

  According to an eighth aspect of the present invention, there is provided a motor device comprising: a yoke housing that rotatably accommodates an armature; a first gear that is rotated by the armature; and a movable conductive plate that is meshed with the first gear and has an end surface. A gear housing that includes a housing portion that houses a second gear that is provided to rotate integrally, and a brush that is sandwiched between the yoke housing and the gear housing to supply power to the armature. A brush holder configured to hold a conducting member that is at least partially conducted to the brush, and a communication hole that communicates the inside and outside of the housing portion in the gear housing in the rotation axis direction of the armature, and one end side is the The other end is connected to the conducting member and protrudes into the second gear housing space in the gear housing. A contact member whose other end is slidably contacted with the movable conductive plate, and a ground terminal portion formed by cutting and raising a part of the contact member and elastically contacting the inner surface of the gear housing. I have.

  In the motor device according to the eighth aspect, power is supplied to the armature through the conductive member held by the brush holder, and the armature rotates. The rotation of the armature is transmitted to the output unit via the first gear and the second gear. At this time, the movable conductive plate rotates together with the second gear, and the contact member changes the position of relative contact with the movable conductive plate (there may be a non-contact portion), for example, information on rotation of the motor device is obtained. It is done.

  Here, in this motor apparatus, since the ground terminal portion is in elastic contact with the inner surface of the gear housing, in other words, the ground terminal is in contact with a portion that is not a joint (boundary) portion with another member in the gear housing. Therefore, the contact of the ground terminal does not affect the sealing performance of the gear housing.

  Thus, in the motor device according to the eighth aspect, the ground terminal can be brought into contact with the inner surface of the gear housing while ensuring the sealability of the gear housing. Further, in the present motor device, since the ground terminal portion is cut and raised from the contact member and formed integrally, a contact member having no ground terminal can be obtained by not cutting and raising the cut portion. That is, the contact member can be shared regardless of the presence or absence of the ground terminal.

  A wiper motor 10 as a motor device according to a first embodiment of the present invention will be described with reference to FIGS. First, the schematic overall configuration of the wiper motor 10 will be described, then the electric circuit 12 of the wiper motor 10 will be described, and then the ground structure 14 which is the main part of the wiper motor 10 will be described in detail. For convenience of explanation, the direction indicated by the arrow U in the figure is referred to as the upward direction, the direction indicated by the arrow F as the forward direction, and the direction indicated by the arrow W as the width direction.

(General outline of geared motor)
1 shows a schematic overall configuration of the wiper motor 10 in a partially cutaway plan view, and FIG. 2 shows a schematic overall configuration of the wiper motor 10 in a bottom view. As shown in these drawings, the wiper motor 10 includes a motor subassembly 16 and a speed reduction unit subassembly 18 constituting the apparatus.

  The motor subassembly 16 rotates in a coaxial and integral manner with a yoke housing 20 formed in a bottomed cylindrical shape as an outer shell, an armature 22 as an armature housed in the yoke housing 20, and the armature 22. An armature shaft 24 as a rotating shaft, a commutator 26 as a commutator provided on the armature shaft 24 on the side of the speed reduction unit subassembly 18 with respect to the armature 22, and a brush holder unit 28 for supplying power to the armature 22 through the commutator 26. It is comprised including. The armature shaft 24, that is, the armature 22 and the yoke housing 20 are configured so that the axial direction is the front-rear direction.

  In the yoke housing 20, one end side along the axial direction of the armature 22 is drawn to form a bottom plate portion 20A, and a flange portion 20B extending to the outer peripheral side is formed at the opening end portion on the other end side. . The yoke housing 20 has a plurality of permanent magnets (not shown) arranged on the inner peripheral surface of the peripheral wall portion thereof, and these permanent magnets are supported so as to face the outer peripheral surface of the armature 22 respectively. Yes. That is, the motor subassembly 16 constituting the wiper motor 10 according to the present embodiment is configured as a magnet motor.

  As shown in FIG. 11, the brush holder unit 28 includes a brush holder 30, a pair of brushes 32 and 33 held by the brush holder 30 so as to be slidable with the commutator 26, and an internal wiring 34 embedded in the brush holder 30. And the main part. Although details will be described later, the internal wiring 34 is configured by the pair of brushes 32 and 33 (the armature 22 and the commutator 26), the external power supply 94, the operation switch 90, and the like to constitute the electric circuit 12 of the wiper motor 10. .

  As shown in FIGS. 1 and 11, the brush holder 30 constituting the brush holder unit 28 includes a cylindrical holder body 38 whose axial direction is the front-rear direction, and a radially outer side from the front end side of the holder body 38. A flange portion 40 extending in the direction is integrally formed. Further, in this embodiment, as shown in FIG. 8, the brush holder 30 is integrally formed with a flat plate portion 42 that is integrally extended in the width direction from the flange portion 40, and the tip end side of the flat plate portion 42. The connector box 44 is formed, and a block-shaped contact base 45 that is integrally protruded toward the speed reduction unit subassembly 18 side. In this embodiment, each part of the brush holder 30 is integrally formed by injection molding of an insulating resin material (insert molding using the wiring member 96 constituting the internal wiring 34 as an insert material). The connector box 44 is detachably connected with an external connector for electrically connecting the external power supply 94, the operation switch 90, etc. to the internal wiring 34.

  As shown in FIG. 1, the brush holder 30 has a holder body portion 38 inserted into the yoke housing 20 through an opening on the flange portion 20 </ b> B side of the yoke housing 20, and the flange portion 40 is a flange of the yoke housing 20. It is abutted against the opening edge on the part 20B side. A pair of brush cases 38A each having a substantially rectangular cylindrical shape are integrally formed on the holder main body 38 so as to face the axis of the commutator 26. Each brush case 38A has a corresponding brush 32, 33 is independently inserted in the commutator 26 so as to be able to contact and separate. Each of the brushes 32 and 33 is connected to a power supply line 46 constituting the electric circuit 12 with the internal wiring 34 and the like. Although not shown, the brushes 32 and 33 are urged toward the commutator 26 by springs, and are pressed against the commutator 26 by this urging force.

  As shown in FIG. 1, a substantially cylindrical alignment bearing 48 is disposed at the center of the holder main body 38, and the armature shaft 24 is inserted into the alignment bearing 48 so that the tip 24A side is external. That is, it protrudes toward the speed reduction unit subassembly 18 side. On the other hand, the other end (not shown) of the armature shaft 24 is rotatably supported by a bearing (not shown) fixed to the center portion of the bottom plate portion 20 </ b> A of the yoke housing 20. As a result, the armature shaft 24, that is, the armature 22 is rotatably supported by the yoke housing 20 and the brush holder unit 28 via a pair of bearings.

  The brush holder unit 28 includes contact plates 50 as a plurality (three in this embodiment) of contact members respectively supported by the contact base 45 of the brush holder 30. Each contact plate 50 is formed in an elongated plate shape in the front-rear direction using a conductive spring material (for example, phosphor bronze) having conductivity and elasticity, and has elasticity (flexibility) in the thickness direction. The three contact plates 50 are arranged at substantially equal intervals in the width direction, and are supported in a cantilever state by the contact base 45 so that the longitudinal directions thereof coincide with the front-rear direction (parallel to each other). .

  These three contact plates 50 are configured to have the same length, and more specifically, the outermost one protrudes along the width direction of the apparatus, and the outermost one protrudes smaller. The base end portion is fixed to the contact base 45 in a stepped manner. In this embodiment, each contact plate 50 has a common size shape. The configuration of each contact plate 50 will be described later together with the configuration of the electric circuit 12 of the wiper motor 10.

  As shown in FIG. 1, the speed reducing portion subassembly 18 includes a gear housing 52 as an outer shell portion. As shown in FIGS. 2, 8, and 9, the gear housing 52 is open on the bottom surface side, and the opening 52A is closed by a cover member (not shown). A gear housing 52 containing a position detection device 65 described later is required to have a required sealing performance at a joint portion with a cover member.

  The gear housing 52 is integrally formed with a flange portion 52B extending from the end on the yoke housing 20 side to the outer peripheral side. As shown in FIGS. 1 and 2, the flange portion 52 </ b> B is abutted against the end surface of the flange portion 20 </ b> B of the yoke housing 20 with the flange portion 40 of the brush holder unit 28 interposed therebetween, and a plurality of screws 54. It is fastened and fixed to the flange portion 20B.

  Thus, the brush holder 30 (brush holder unit 28) is sandwiched (intervened) between the yoke housing 20 and the gear housing 52 along the axial direction, and the motor subassembly 16 and the speed reduction unit sub It is fixed to the assembly 18. In this embodiment, the front direction along the axis of the armature 22 is the assembly direction of the brush holder unit 28 with respect to the yoke housing 20 (gear housing 52), and the speed reducing portion subassembly 18 (yoke housing) with respect to the brush holder unit 28. 20).

  Further, as shown in FIGS. 1 and 2, the speed reducing portion subassembly 18 is engaged with each other to form a speed reducing mechanism disposed in the gear housing 52, and the worm 56 as the first gear and the second gear as the second gear. A worm wheel 58 is provided. The worm 56 is supported by a pair of front and rear bearings 60 and 62 disposed in the gear housing 52 so as to be rotatable about its own axis. The worm 56 is disposed coaxially with the armature shaft 24 of the motor subassembly 16, and the coupling 64 (see FIG. 12) in a state where the motor subassembly 16 and the speed reduction unit subassembly 18 are coupled to each other. The armature shaft 24 is connected to the armature shaft 24 through a via. The through holes 59 shown in FIGS. 3 and 4 are for connecting the armature shaft 24 and the worm 56.

  The worm wheel 58 is rotatably supported by a rotation shaft 66 fixed to the gear housing 52 as shown in FIGS. 1 and 5, and the rotation of the worm 56 forms a discrepancy axis with the axis S of the worm 56. It is decelerated around the rotating shaft 66 and rotates. As shown in FIG. 1, one end surface in the thickness direction of the worm wheel 58 (in this embodiment, the upper surface 58A facing the upper bottom surface 52C of the gear housing 52) is a thin film-shaped movable conductive material having a predetermined conductive pattern shape. A plate 68 is provided.

  As shown in FIG. 1, the movable conductive plate 68 includes a contact hole 55 provided in the gear housing 52 and a contact hole 50 provided in the gear housing 52 such as a worm wheel 58. The tip (contacts 50A to 50C described later) is slidably contacted. Thereby, in the wiper motor 10, the contact state with the three contact plates 50 switches according to the rotational position of the worm wheel 58, and the electric circuit 12 of the wiper motor 10 mentioned later is comprised. That is, as will be described in detail later, the movable conductive plate 68 constitutes a position detection device (switch) 65 with the internal wiring 34 and the contact plate 50.

  The movable conductive plate 68 is fixed by, for example, punching a conductive metal plate into a predetermined conductive pattern shape and fitting into one end surface of the worm wheel 58. In this embodiment, the thin film-shaped movable conductive plate 68 includes a ring-shaped annular portion 68A in which two adjacent contact plates 50 are in contact with each other, and a circumferential direction in a region in which the inner peripheral contact plate 50 is in contact with the annular portion 68A. The main part is formed with a cutout part 68B with a part cut away and a protruding part 68C that protrudes from a part of the annular part 68A in the circumferential direction to a region where the contact plate 50 on the outer peripheral side contacts.

  Further, as shown in FIG. 1, the speed reducer subassembly 18 includes a pivot shaft 70 as an output shaft, and a swing mechanism 72 for converting the rotation of the worm wheel 58 into the reciprocating rotation of the pivot shaft 70. ing. The pivot shaft 70 is rotatably supported on a shaft support portion 52D (see FIGS. 8 and 9) of the gear housing 52 by a bearing (not shown) so as to be parallel to the worm wheel 58. Although not shown in the drawings, the pivot shaft 70 of the wiper motor 10 is configured such that a wiper arm is connected to a tip portion protruding from the shaft support portion 52D of the gear housing 52.

  As shown in FIG. 1, the swing mechanism 72 has a connecting rod 76 having one end rotatably connected to a portion of the worm wheel 58 that is radially spaced from the rotary shaft 66 via a support shaft (crank pin) 74. And a rotating lever 80 that is rotatably connected to the other end of the connecting rod 76 via a support shaft 78. The rotation lever 80 is connected to the pivot shaft 70 via the clutch mechanism 82. Although detailed description is omitted, the clutch mechanism 82 transmits torque from the swing mechanism 72 to the pivot shaft 70 when the load (torque) of the pivot shaft 70 (wiper arm) is equal to or less than a predetermined value. The torque transmission from the swinging mechanism 72 to the pivot shaft 70 is interrupted when the load exceeds the predetermined value.

  As a result, in the deceleration unit subassembly 18, the rotation of the worm wheel 58 is converted into the reciprocating rotation of the rotary lever 80, that is, the pivot shaft 70 by the swing mechanism 72, and the wiper arm connected to the pivot shaft 70 is moved up and down. The wiping operation is performed while reciprocating between the inversion positions. That is, in the wiper motor 10, when the armature 22 rotates with respect to the yoke housing 20 by the operation of the motor subassembly 16, this rotation is decelerated by the worm 56 and the worm wheel 58 of the speed reduction unit subassembly 18, and via the swing mechanism 72. Thus, the wiper arm is reciprocated by being converted to swinging of the pivot shaft 70.

(Electric circuit of wiper motor)
FIG. 14A shows an electric circuit 12 for driving the wiper motor 10 described above, and FIG. 14B shows an electric circuit of the wiper motor 10 in which the position detection device 65 is illustrated as a changeover switch. Twelve equivalent circuits are shown. As shown in these drawings, the electric circuit 12 includes an internal circuit 84 formed in the wiper motor 10 in a portion surrounded by an alternate long and short dash line L. The armature 22, the commutator 26, and the pair of brushes 32 and 33 The internal wiring 34, each contact plate 50, and a movable conductive plate 68 are included. Further, the portions of the internal circuit 84 located on the alternate long and short dash line L are terminals 44A, 44B, 44C, and 44D disposed in the connector box 44.

  As shown in FIGS. 14A and 14B, the terminal 44A is electrically connected to one brush 32 through the internal wiring 34A of the internal wiring 34 and the choke coil 86. The terminal 44B is electrically connected to the other brush 33 via the internal wiring 34B1, the circuit breaker 88, and the internal wiring 34B2. Accordingly, the terminal 44A, internal wiring 34B1, choke coil 86, brush 32, commutator 26 (armature 22), brush 33, internal wiring 34B2, circuit breaker 88, internal wiring 34B1, and terminal 44B are connected in series in this order. .

  In the internal circuit 84, the terminal 44C is electrically connected to the contact 50A formed by the contact plate 50 located at the center of the three contact plates 50 via the internal wiring 34C. Further, the terminal 44D is electrically connected to a contact 50B formed by the contact plate 50 located on the inner peripheral side of the three contact plates 50 via the internal wiring 34D. Of the three contact plates 50, the contact 50C formed by the outer peripheral contact plate 50 is connected to the internal wiring 34E branched from the internal wiring 34B1.

  Further, the electric circuit 12 is connected to the operation switch 90. The operation switch 90 is electrically connected to the terminals 44A, 44C and 44D via connector wirings 90A, 90B and 90C (not shown) connected to the connector box 44. The operation switch 90 is configured to selectively switch between an ON state and an OFF state. In the OFF state, the wire 90A (terminal 44A) and the wire 90B (terminal 44C) are connected, and in the ON state, the wire 90A. And the wiring 90C (terminal 44D).

  On the other hand, the terminal 44B is connected to an external ground (ground) 92 such as a vehicle body via a connector wiring 92A (not shown) connected to the connector box 44. In the electric circuit 12, a power supply wiring 94A having one end connected to the external power supply 94 is connected (branched) to the wiring 90C. Further, in the electric circuit 12, the internal ground 95 of the wiper motor 10 is electrically connected to the internal wiring 34B1 or the internal wiring 34E (shown as the internal wiring 34B1 in FIG. 14). The external ground 92 and the internal ground 95 are configured to serve as both the negative pole of the power system for driving the motor subassembly 16 and the negative pole of the signal system of the position detection device 65.

  Thereby, in the electric circuit 12, when the operation switch 90 is in the ON state, the external power supply 94 and the terminal 44A are conducted by the operation switch 90. In other words, the brush 32 is connected to the external power supply 94. In addition, since the brush 33 is connected to the external ground 92 and the internal ground 95, the motor subassembly 16 (wiper motor 10) operates.

  In the electric circuit 12, when the operation switch 90 is in the OFF state, the terminal 44 </ b> C and the terminal 44 </ b> A are electrically connected by the operation switch 90, so that the brush 32 contacts the contact plate 50 of the position detection device 65. The presence or absence of power supply can be switched according to the state (the rotational position of the worm wheel 58). In this case, as shown in FIGS. 14A and 14B, the contact 50B of the contact plate 50 is located at the notch 68B and there is no conduction between the contact 50A and the contact 50B via the movable conductive plate 68. In this state, the brush 32 is disconnected from the external power supply 94, and the rotation of the motor subassembly 16 is stopped.

  On the other hand, when the contact 50A and the contact 50B are electrically connected via the annular portion 68A, the wiring 90C, the contact 50B of the contact plate 50B, the annular portion 68A, the contact 50A, and the operation switch 90 (the terminal 44C to which the operation switch 90 is connected) 44A), an external power supply 94 is connected to the brush 32 through 44A), so that the rotation of the motor subassembly 16 is maintained. The movable conductive plate 68 notch portion 68B and the overhang portion 68C constituting the position detection device 65 are respectively set corresponding to the lower inverted position (storage position) of the wiper arm, and the conduction between the contact 50A and the contact 50B is cut off. Then, the contact 50A and the contact 50C are electrically connected to form a closed circuit that does not include the external power supply 94. Due to this closed circuit, a power generation load (braking force) acts on the armature 22 from which the power supply from the external power supply 94 is cut off against rotation due to inertia.

  The internal circuit 84 constituting the electric circuit 12 described above is configured such that a portion excluding the commutator 26 (armature 22) which is a mechanical movable portion and the thin film-like movable conductive plate 68 is held by the brush holder unit 28. Yes. Specifically, a wiring member 96 as a conductive member as shown in FIGS. 12 and 13 is partially embedded in the brush holder 30 of the brush holder unit 28. The wiring member 96 includes a first wiring member 96A in which the terminals 44A to 44D and the internal wirings 34A, 34B1, 34C, 34D, and 34E are integrated, and a second wiring member 96B in which the internal wiring 34B2 is mainly formed. It consists of and.

  As shown in FIG. 11, the internal wiring 34A, 34B1, 34C, 34D of the first wiring member 96A is connected to the connecting portion 98 (FIGS. 3, 4, and 4) from the window portion 42A provided in the flat plate portion 42 of the brush holder 30. 11) is exposed, and the internal wiring 34A, 34B1, 34C, 34D is made independent (non-conductive) by cutting the connecting portion 98 as shown in FIGS. It has become so. In the first wiring member 96A, each connection portion 100 with the corresponding contact plate 50 in the internal wiring 34B, 34C, 34E is moved from the brush holder 30 to the speed reduction portion subassembly 18 side as shown in FIGS. It is protruding. Each connecting portion 100 has a crimped shape with a tip portion separated into two.

  In the first wiring member 96A, the connection portion 102 of the choke coil 86 in the internal wiring 34A and the connection portion 104 of the circuit breaker 88 in the internal wiring 34B1 are provided so as to protrude from the brush holder 30, respectively. On the other hand, in the second wiring member 96B, the connection part 106 of the brush 32 in the internal wiring 34B2 and the connection part 108 of the circuit breaker 88 in the internal wiring 34B2 are provided so as to protrude from the brush holder 30, respectively. As shown in FIG. 12, the internal wiring 34F extending from the internal wiring 34A and the internal wiring 34G extending from the internal wiring 34B1 can be connected to each other by a capacitor (not shown). 109 is integrally formed so as to protrude from the brush holder 30, and the wiring member 96 is shared by the wiper motor 10 provided with a capacitor.

  Since the wiring member 96 described above is embedded in the brush holder 30 by insert molding, the portion excluding the commutator 26 and the thin film-like movable conductive plate 68 in the internal circuit 84 as described above, The brush holder unit 28 is configured so as to be integrally handled. The wiring member 96 is made of a conductive material (for example, brass or the like) that is inferior in spring property to the contact plate 50 (a ground terminal member 120 described later) but has good workability.

  In the brush holder unit 28, the contact plates 50 constituting the contacts 50A to 50C of the internal circuit 84 are mechanically and electrically connected to the corresponding connecting portions 100, respectively. As shown in FIG. 12, the contact plate 50 includes a flat plate-like mounting portion 110 formed with a fitting hole 110 </ b> A into which each connection portion 100 is fitted, and extends from the upper end of the mounting portion 110 to the speed reduction portion subassembly 18 side. The main parts are a supported part 112 provided and supported by the contact base 45, and a spring part 114 extending obliquely downward from the front end of the supported part 112 and having tips 50A to 50C at the tips. As shown in FIG. 7, the contact plates 50 are held so as not to be detached from the wiring member 96 by caulking each connection portion 100.

(Internal ground structure of wiper motor)
As described above, the internal circuit 84 constituting the electric circuit 12 is provided with the internal ground 95. The internal ground 95 is configured by conducting the internal wiring 34B1 or the internal wiring 34E to a conductive material (for example, metal) gear housing 52. In the wiper motor 10, the ground terminal member 120 constituting the internal ground 95 of the wiper motor 10 is attached to the connection portion 100 for connecting the contact plate 50 in the wiring member 96 constituting the internal circuit 84.

  In this embodiment, as shown in FIGS. 1, 3, and 11 to 13, the ground terminal member 120 is detachably attached to the connecting portion 100 of the internal wiring 34E through which the contact 50C is conducted. 4 to 6, the gear housing 52 is brought into contact (conductive) with a hole wall 55 </ b> A that forms the lower edge of the communication hole 55 in the gear housing 52.

  Specifically, as shown in FIGS. 10A to 10D, the ground terminal member 120 includes a mounting portion 122 attached to the connection portion 100 and a hole wall of the communication hole 55. The contact leaf spring portion 124 that is elastically contacted with 55A, and the connecting portion 126 that connects the contact leaf spring portion 124 and the attachment portion 122 are mainly configured. The attachment portion 122 is configured by integrally forming a curl spring portion 122B from both ends of the flat base portion 122A in the width direction.

  As shown in FIGS. 10A and 10D, the curl spring portion 122B has each free end portion 122C closest to the upper surface of the base portion 122A and the free end portions 122C and 122A in the free state. Is curved (curled) so that the distance between the two is less than the thickness of each connecting portion 100. Similarly to the contact plate 50, the ground terminal member 120 is made of a conductive spring material (for example, phosphor bronze) having conductivity and elasticity.

  As shown in FIG. 3, FIG. 6 (A), and FIG. 6 (B), the ground terminal member 120 is sandwiched between each free end portion 122C of the attachment portion 122 and the base portion 122A, thereby the free end portion. The connection portion 100 is held in a good conductive state by the biasing force of the curl spring portion 122B that is deformed so that the portion 122C and the base portion 122A are separated from each other. Further, as shown in FIG. 7, in the ground terminal member 120, the attachment portion 110 of the contact plate 50 having the contact point 50C causes the connection portion 100 to be fitted into the fitting hole 110A and the connection portion 100 is caulked. As a result, the contact plate 50 and the connection portion 100 (wiring member 96) are held so as not to fall off.

  Further, as shown in FIGS. 10A to 10D, the connecting portion 126 has the lateral wall 126B from the lower end of the standing wall 126A continuous to the front end of the base portion 122A to the front side (the side opposite to the mounting portion 122). It is configured to extend. The leaf spring portion 124 is continuous with the front end of the lateral wall 126B, is configured to be deformable so as to change the posture with respect to the connecting portion 126, and has elasticity in the vertical direction. As described above, a guide portion 124A that is folded back obliquely upward is integrally formed on the free end side of the contact leaf spring portion 124 that has elasticity in the vertical direction. As shown in FIG. 6A, the ground terminal member 120 is adapted to fit the attachment portion 122 to the connection portion 100 by relative displacement in the front-rear direction.

  On the other hand, the hole wall 55 </ b> A of the communication hole 55 extends to the lower side of the connection portion 100 so as to contact the contact leaf spring portion 124 attached to the connection portion 100. As the ground terminal member 120 moves close to the connecting portion 100 along the front-rear direction as described above, the guide portion 124A is brought into contact with and slides on the lower opening edge 55B of the communication hole 55. The contact leaf spring portion 124 is deformed and guided into the communication hole 55. That is, by providing the guide portion 124 </ b> A, interference between the free end of the contact leaf spring portion 124 and the wall surface 52 </ b> E below the communication hole 55 in the gear housing 52 is prevented.

  Next, the operation of the first embodiment will be described.

  In the wiper motor 10 having the above-described configuration, when the operation switch 90 is switched to the ON state, the brush 32 is electrically connected to the external power supply 94 via the operation switch 90, and power is supplied from the brush 32 to the armature 22 via the commutator 26. Therefore, the motor subassembly 16 operates. Then, the rotation of the armature 22 is transmitted while being decelerated to the worm wheel 58 via the armature shaft 24, the coupling 64, and the worm 56, and the rotation of the worm wheel 58 is further reciprocated by the pivot shaft 70 via the swing mechanism 72. Converted to rotation. As a result, the wiper arm attached to the pivot shaft 70 wipes the windshield glass or the rear glass while reciprocating between the upper and lower inversion positions.

  On the other hand, when the operation switch 90 is switched to the OFF state, if the wiper arm is located at a position other than the lower reverse position (storage position), the brush 32 is externally connected via the movable conductive plate 68 of the position detection device 65. Since the power supply 94 is electrically connected, the operation of the motor subassembly 16 (rotation of the armature 22) is maintained. When the wiper arm reaches the lower reversal position, the notch 68B of the movable conductive plate 68 reaches the position of the contact 50B, so that the conduction between the brush 32 and the external power supply 94 is interrupted and the contact 50C protrudes to the position of the contact 50C. Since the part 68C arrives, a closed circuit is formed in the state shown in FIG. 14A and FIG. 14B for the position detection device 65, and the armature 22 stops in a short time by receiving a braking force accompanying power generation.

  Here, in the wiper motor 10, since the ground terminal member 120 is in elastic contact with the hole wall 55 </ b> A of the communication hole 55 for inserting the contact plate 50 in the gear housing 52, in other words, the ground terminal member 120 is connected to the gear terminal 52. The ground terminal member is in contact with the hole wall 55A of the communication hole 55 that is not a cover member for closing the opening 52A in the housing 52 or a joint (boundary) portion with the yoke housing 20 (brush holder 30) or the like. The contact 120 does not affect the sealability of the gear housing 52.

  Thus, in the motor device according to the first aspect, the ground terminal member 120 can be brought into contact with the inner surface of the gear housing 52 while ensuring the sealing performance of the gear housing 52.

  In the wiper motor 10, since the ground terminal member 120 is a member different from the wiring member 96, the wiring member 96 is made common regardless of whether or not the ground terminal member 120 is installed and the installation position is different. Can do. For example, when the internal ground 95 that is in contact with the gear housing 52 is formed of a portion formed integrally with the wiring member 96, the shape of the wiring member 96 needs to be changed depending on the position of the internal ground 95. In the wiper motor 10, since the ground terminal member 120 is a separate member from the wiring member 96, the wiring member 96 can be used in common with each specification as described above.

  Furthermore, since the ground terminal member 120 is connected to one of the plurality of connecting portions 100 provided in the wiring member 96, the ground terminal member 120 is connected to the wiring member 96. In the configuration in which the connection position of the ground terminal member 120 is different depending on the specification, a plurality of dedicated connection portions for connecting the ground terminal member 120 are provided according to the specification. There is no need. Thereby, in the wiper motor 10, the wiring member 96 can be made common in each specification as described above, and the structure can be simplified.

  Furthermore, in the wiper motor 10, the ground terminal member 120, which is a separate member from the wiring member 96, can be made of a material having better spring property than the wiring member 96. Accordingly, in the wiper motor 10, for example, the ground terminal member 120 is formed on the hole wall 55 </ b> A of the gear housing 52 as compared with a case where the internal ground 95 that contacts the gear housing 52 is formed by a portion formed integrally with the wiring member 96. Can be reliably brought into contact with each other, and the resistance of the internal ground 95 can be reduced to obtain good ground performance.

  Here, in the wiper motor 10, since the ground terminal member 120 is separated from the contact plate 50, a plurality of contact plates 50 can be shared.

  Next, another embodiment of the present invention will be described. Note that parts / parts that are basically the same as those in the first embodiment or the previous configuration are denoted by the same reference numerals as those in the first embodiment or the previous configuration, and the description thereof is omitted. Illustration may be omitted.

(Second Embodiment)
15 shows a wiper motor 130 according to a second embodiment of the present invention in an exploded perspective view corresponding to FIG. As shown in this figure, the wiper motor 130 is different from the brush holder unit 28 having three contact plates 50 in that the first embodiment is provided with a brush holder unit 132 having two contact plates 50. This is different from the wiper motor 10.

  The electric circuit 134 for driving the wiper motor 130 is configured as shown in FIGS. 18 (A) and 18 (B). Specifically, in the internal circuit 136 of the electric circuit 134, the terminal 44C of the connector box 44 is electrically connected to the contact 50A of the contact plate 50 through the internal wiring 34C, and the internal wiring 34E through the internal wiring 34C. That is, it is electrically connected to the internal ground 95.

  Further, the electric circuit 134 is connected to the control device 138. The control device 138 is electrically connected to the terminals 44A, 44C, and 44D through connector wirings 138A, 138B, and 138C (not shown) connected to the connector box 44. The control device 138 is electrically connected to an external power supply 94 and an external ground 92, respectively. Thus, in the electric circuit 134, the terminal 44C (internal ground 95, external ground 92) serves as both the negative pole of the power system for driving the motor subassembly 16 and the negative pole of the signal system of the position detection device 65. Has been. In this embodiment, the terminal 44B is not connected to the external ground 92.

  The control device 138 includes a switch unit 142 and a control unit (ECU) 144. Then, when the switch unit 142 is turned on, the control unit 138 causes the external power supply 94 to conduct to the brush 32 when the switch unit 142 is turned on, and when the switch unit 142 is turned off, the control unit 138 performs contact between the contact 50A and the contact 50B. The control unit 144 is configured to block the conduction between the brush 32 and the external power supply 94 on condition that the signal based on the presence / absence of conduction is OFF (non-conduction). That is, in this embodiment, the position detection device 65 functions as a position sensor instead of a contact changeover switch.

  As shown in FIG. 17, the internal circuit 136 of the electric circuit 134 described above is held by the brush holder unit 132 except for the commutator 26 (armature 22), which is a mechanical movable part, and the thin film-like movable conductive plate 68. Has been configured. Specifically, a wiring member 96 is partially embedded in the brush holder 30 of the brush holder unit 28. In this embodiment, the wiring member 96 forms the internal circuit 136 having the above-described configuration by leaving the connection portion 98 between the internal wiring 34B1 and the internal wiring 34C.

  In the wiper motor 130, as shown in FIGS. 15, 16, and 17, the ground terminal member 120 is connected to the connecting portion 100 of the internal wiring 34E to which the contact plate 50 is not connected, thereby forming the internal ground 95. Has been. The ground terminal member 120 is held in a favorable conductive state by the connecting portions 100 by the urging force of the curl spring portion 122B of the mounting portion 122, and the connecting portions 100 are prevented from falling off by the caulking of the connecting portions 100. Has been. The gap corresponding to the thickness of the mounting portion 110 of the contact plate 50 is absorbed at the angle of the splitting. Other configurations of the wiper motor 130 are the same as the corresponding configurations of the wiper motor 10.

  Therefore, even with the wiper motor 130 according to the second embodiment, basically the same effect can be obtained by the same operation as the wiper motor 10 according to the first embodiment. The wiper motor 10 and the wiper motor 130 have different control methods, that is, the electric circuit 12 (internal circuit 84) and the electric circuit 134 (internal circuit 136), but the ground terminal member 120 is the wiring member 96 and the contact plate 50. As a separate member, the wiring member 96, the movable conductive plate 68, and the contact plate 50 (with their dimensions) are made common.

  That is, by making the ground terminal member 120 separate from the contact plate 50, the ground terminal member 120 is attached to the connection portion 100 together with the contact plate 50 like the wiper motor 10, or is attached alone like the wiper motor 130. It becomes possible.

(Third embodiment)
FIG. 19A shows a partially exploded side sectional view of the brush holder unit 152 constituting the wiper motor 150 according to the third embodiment of the present invention, and FIG. The holder unit 152 is shown in a side sectional view. As shown in this figure, the wiper motor 150 is different from the wiper motors 10 and 130 according to the first and second embodiments in that a ground terminal member 154 is provided instead of the ground terminal member 120 as a ground terminal.

  As shown in FIGS. 20A to 20D, the ground terminal member 154 includes an attachment portion 156 attached to the connection portion 100, and a contact leaf spring portion 158 continuous below the attachment portion 156. The holding leaf spring portion 160 that is continuous above the attachment portion 156 is a main portion. The mounting portion 156 includes an upright wall 156A that matches the mounting portion 110 of the contact plate 50 or is formed in an approximate shape, and a lateral wall 156B that extends forward from the lower edge of the upstanding wall 156A. Is extended to the opposite side). The standing wall 156A is formed with a fitting hole 156C having a fitting shape or an approximate shape.

  Further, the leaf spring portion 158 is configured to be deformable so as to change the posture with respect to the attachment portion 156, and has elasticity in the vertical direction. The contact leaf spring portion 158 is formed in an approximate shape or matched to the contact leaf spring portion 124 of the ground terminal member 120 in a side view, and extends rearward from the front end of the lateral wall 156B. The contact leaf spring portion 158 has a guide portion 158A that performs the same function as the guide portion 124A. The holding leaf spring portion 160 is configured to extend obliquely upward from the upper end of the attachment portion 156.

  The ground terminal member 154 described above has the contact leaf spring portion 158 of the gear housing 52 in a state where the connection portion 100 is fitted in the fitting hole 156C of the attachment portion 156, as shown in FIG. While being in elastic contact with the hole wall 55 </ b> A, the holding leaf spring portion 160 is in elastic contact with the supported portion 112 of the contact plate 50. In other words, in the ground terminal member 154, the ground terminal member 120 is elastically sandwiched between the base portion 122A and each free end portion 122C of the curl spring portion 122B, thereby preventing rattling with respect to the connecting portion 100. On the other hand, the upper and lower holding leaf spring portions 160 and the contact leaf spring portions 158 are elastically pressed against the supported portion 112 and the hole wall 55A, respectively, to prevent the connection portion 100 from rattling.

  When the ground terminal member 154 is applied to a configuration having the electric circuit 134 such as the wiper motor 130, the holding leaf spring portion 160 comes into elastic contact with the contact base 45 of the brush holder 30. That is, the ground terminal member 154 can be applied to any of the electric circuits 12 and 134 (internal circuits 84 and 136), similarly to the ground terminal member 120. The other configuration of the wiper motor 150 is the same as the corresponding configuration of the wiper motor 10 or the wiper motor 130.

  Therefore, even with the wiper motor 150 according to the third embodiment, basically the same effect can be obtained by the same operation as the wiper motors 10 and 130 according to the first or second embodiment.

  Note that, instead of the ground terminal member 120 and the ground terminal member 154 according to the first to third embodiments, a wiper motor is used by using, for example, a ground terminal member 162 as shown in FIGS. 10, 130, 150 may be configured.

  Supplementing the ground terminal member 162, the ground terminal member 162 mainly includes an attachment portion 164 attached to the connection portion 100 and a contact leaf spring portion 124 continuing to the lower end of the attachment portion 164. The mounting portion 164 is formed with a fitting hole 164B into which the connecting portion 100 is fitted in a flat plate-like standing wall 164A, and is cut and raised so as to protrude into the fitting hole 164B in a front view in a non-attached state. It has a pair of upper and lower leaf springs 164C. The pair of upper and lower leaf springs 164C protrudes on the opposite side to the insertion side of the connection portion 100 in the front-rear direction, and allows insertion (fitting) of the connection portion 100 into the fitting hole 164B and after fitting. It is designed to hinder extraction. Further, a pair of arm portions 164D are extended from both ends in the width direction of the standing wall 164A toward the protruding side of 164C so as to be engaged with the distal end of the connecting portion 100 after being split. As a result, the ground terminal member 162 is prevented from being displaced further into the back of the contact base 45 after the connection portion 100 is squeezed. Furthermore, a seating portion 164E seated on the supported portion 112 of the contact plate 50 or the contact base 45 extends forward from the upper end of the standing wall 164A. Further, a lateral wall 164F that continues to the front edge of the contact leaf spring portion 124 extends forward from the lower edge of the flat plate portion 164A.

  Even with the configuration using the ground terminal member 162 described above, the same operational effects as those of the wiper motors 10, 130, and 150 including the ground terminal member 120 or the ground terminal member 154 can be obtained.

(Fourth embodiment)
FIG. 22 shows an exploded perspective view corresponding to FIG. 3 of a wiper motor 170 according to a fourth embodiment of the present invention. As shown in this figure, in the wiper motor 170, the brush holder unit 171 has a contact plate 174 integrally formed with a ground terminal portion 172 as a ground terminal instead of one of the contact plates 50. The wiper motors 10 and 150 according to the first and third embodiments and the modified examples using the ground terminal members 120, 154, and 162, which are separate from the contact plate 50, are provided.

  As shown in FIG. 23 and FIG. 24, the contact plate 174 as a contact member mainly includes an attachment part 110, a supported part 112, a spring part 114, and a ground terminal part 172. The ground terminal portion 172 is matched with the contact leaf spring portion 124 from the front end to a base portion 176 extending from the lower end of the mounting portion 110 toward the supported portion 112 side, or an approximate shape contact leaf spring portion 178. Is extended. The contact leaf spring portion 178 has a guide portion 178A that performs the same function as the guide portion 124A.

  Accordingly, in the wiper motor 170, as shown in FIG. 23, when the contact plate 174 is connected to the connection portion 100 of the internal wiring 34E, the contact leaf spring portion 178 of the ground terminal portion 172 is in elastic contact with the hole wall 55A. It has become. Other configurations of the wiper motor 170 are the same as those of the wiper motors 10 and 150 according to the first to third embodiments.

  Therefore, the wiper motor 170 according to the fourth embodiment is basically the same as in the first to third embodiments except for the operational effect due to the contact plate 50 and the ground terminal members 120 and 154 being separate. The same effect can be obtained by the same operation as the wiper motors 10 and 150. In the wiper motor 170, since the ground terminal portion 172 is integrally provided on the contact plate 174, the number of parts (assembly man-hours) can be reduced as compared with a configuration in which a separate ground terminal is provided. .

(Fifth embodiment)
FIG. 25 shows an exploded perspective view corresponding to FIG. 3 of a wiper motor 180 according to a fifth embodiment of the present invention. As shown in this figure, in the wiper motor 180, the brush holder unit 181 is replaced with a contact plate 174 integrally provided with a ground terminal portion 172 that is elastically contacted with the hole wall 55A of the gear housing 52. The wiper motor 170 according to the fourth embodiment is different from the wiper motor 170 according to the fourth embodiment in that it includes a contact plate 184 integrally provided with a ground terminal portion 182 that is elastically contacted with the upper bottom surface 52C.

  As shown in FIGS. 26, 27 (A), and 27 (B), the ground terminal portion 182 of the contact plate 184 as a contact member is formed as a cut-and-raised plate spring provided in the supported portion 112. Has been. More specifically, the ground terminal portion 182 includes a tongue piece portion 182A (see FIG. 27B) inside the substantially U-shaped cut C that opens toward the spring portion 114 in plan view in the supported portion 112. As shown in FIG. 27 (A), it is formed as a leaf spring by being raised obliquely upward.

  As a result, in the wiper motor 180, as shown in FIG. 26, when the contact plate 184 is connected to the connecting portion 100 of the internal wiring 34E, the ground terminal portion 182 comes into elastic contact with the upper bottom surface 52C of the gear housing 52. . The portion of the upper and bottom surfaces 52 </ b> C of the gear housing 52 that is in elastic contact with the ground terminal portion 182 may be the inner surface of the communication hole 55, or may be closer to the accommodation space 69 than the communication hole 55. In this embodiment, as shown in FIG. 26, the ground terminal portion 182 is in elastic contact with the upper bottom surface 52 </ b> C in the vicinity of the opening end 55 </ b> C of the communication hole 55 in the accommodation space 69.

  Other configurations of the wiper motor 180 are the same as those of the wiper motors 10, 150, and 170 according to the first, third, and fourth embodiments. That is, in the wiper motor 180, the ground terminal portion 182 constitutes a housing space 69 that is not a joint portion with the cover member, the yoke housing 20 (brush holder 30), or the like for closing the opening 52A in the gear housing 52. It is in contact with the upper bottom surface 52C.

  Therefore, the wiper motor 180 according to the fifth embodiment can basically obtain the same effect by the same operation as that of the wiper motor 170 according to the fourth embodiment. Since the wiper motor 180 uses the contact plate 184 having substantially the same appearance as the contact plate 50, the material yield is not changed by changing the parts to the contact plate 184. Further, in the wiper motor 180, as shown in FIG. 27B, a member that does not cut and raise the tongue piece 182A can be used as the contact plate 50. Therefore, the contact plate 50 and the contact plate 184 can be shared. .

  In the above-described embodiment, an example in which the motor device of the present invention is applied to a wiper motor is shown. However, the present invention is not limited to this, and the present invention may be applied to a motor device of any application.

  In the above-described embodiment, the example in which the speed reduction mechanism that configures the speed reduction unit subassembly 18 is a worm speed reduction mechanism including the worm 56 and the worm wheel 58 is shown, but the present invention is not limited to this, For example, a spur gear train, a hypoid gear mechanism, a planetary gear train, or the like may be used as the speed reduction mechanism.

1 is a partially cutaway plan view showing an overall configuration of a wiper motor according to a first embodiment of the present invention. It is the bottom view which removed the cover member which shows the whole structure of the wiper motor which concerns on the 1st Embodiment of this invention. It is a perspective view which decomposes | disassembles and shows the principal part of the wiper motor which concerns on the 1st Embodiment of this invention. It is a perspective view which expands and shows the principal part of the wiper motor which concerns on the 1st Embodiment of this invention. It is a sectional side view which shows the deceleration part subassembly which comprises the wiper motor which concerns on the 1st Embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which expands and shows the principal part of the wiper motor which concerns on the 1st Embodiment of this invention, Comprising: (A) is a partial sectional view which shows partially exploded, (B) is a sectional side view of an assembly | attachment state. . It is a bottom sectional view showing the attachment state of the ground terminal member in the wiper motor concerning the 1st embodiment of the present invention. It is a perspective view which shows the arrangement | positioning relationship between the whole structure of the gear housing which comprises the wiper motor which concerns on the 1st Embodiment of this invention, and a ground terminal member. It is a perspective view which shows the gear housing which comprises the wiper motor which concerns on the 1st Embodiment of this invention. It is a figure which shows the ground terminal member which comprises the wiper motor which concerns on the 1st Embodiment of this invention, Comprising: (A) is a perspective view, (B) is a side view, (C) is a bottom view, (D) is a front view FIG. 1 is a partially cutaway perspective view showing a brush holder unit constituting a wiper motor according to a first embodiment of the present invention. It is a perspective view which shows the member for wiring which comprises the wiper motor which concerns on the 1st Embodiment of this invention. It is a rear view which shows the member for wiring which comprises the wiper motor which concerns on the 1st Embodiment of this invention. It is a figure which shows the electric circuit for driving the wiper motor which concerns on the 1st Embodiment of this invention, Comprising: (A) is a circuit diagram, (B) is an equivalent circuit schematic. It is a perspective view which decomposes | disassembles and shows the principal part of the wiper motor which concerns on the 2nd Embodiment of this invention. It is a sectional side view which expands and shows the principal part of the wiper motor which concerns on the 2nd Embodiment of this invention. It is a perspective view which shows the member for wiring which comprises the wiper motor which concerns on the 2nd Embodiment of this invention. It is a figure which shows the electric circuit for driving the wiper motor which concerns on the 2nd Embodiment of this invention, Comprising: (A) is a circuit diagram, (B) is an equivalent circuit schematic. It is a figure which expands and shows the principal part of the wiper motor which concerns on the 3rd Embodiment of this invention, Comprising: (A) is a sectional side view which shows partially disassembled, (B) is a sectional side view of an assembly | attachment state. . It is a figure which shows the ground terminal member which comprises the wiper motor which concerns on the 3rd Embodiment of this invention, Comprising: (A) is a perspective view, (B) is a side view, (C) is a bottom view, (D) is a front view. FIG. It is a figure which shows the modification of the ground terminal member which comprises the wiper motor which concerns on the 1st-3rd embodiment of this invention, (A) is a perspective view, (B) is a side view, (C) is a bottom view. , (D) is a front view. It is a perspective view which decomposes | disassembles and shows the principal part of the wiper motor which concerns on the 4th Embodiment of this invention. It is a sectional side view which expands and shows the principal part of the wiper motor which concerns on the 4th Embodiment of this invention. It is a perspective view which shows the contact member with a ground terminal part which comprises the wiper motor which concerns on the 4th Embodiment of this invention. It is a perspective view which decomposes | disassembles and shows the principal part of the wiper motor which concerns on the 5th Embodiment of this invention. It is a sectional side view which expands and shows the principal part of the wiper motor which concerns on the 5th Embodiment of this invention. It is a figure which shows the contact member with a ground terminal part which comprises the wiper motor which concerns on the 5th Embodiment of this invention, (A) is a perspective view, (B) is the state before cutting and raising of the ground terminal part 182. It is a perspective view shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Wiper motor (motor apparatus), 20 ... Yoke housing, 22 ... Armature, 30 ... Brush holder, 32 * 33 ... Brush, 34 ... Internal wiring (conduction member), 50 ... Contact plate (contact member), 52 ... Gear housing, 52C ... Upper bottom surface (inner surface of second gear housing portion in gear housing) 55 ... Communication hole, 55A ... Hole wall, 56 .... Worm (first gear), 58 ... Worm wheel (second gear), 68 ... Movable conductive plate, 69 ... Accommodating space (accommodating part), 96 ... Wiring member (conducting) Member), 100... Connection portion, 120... Ground terminal member (ground terminal), 130, 150, 170, 180... Wiper motor (motor device), 154.162. (Ground terminal), 172, 182 ... the ground terminals (ground terminals), 174, 184 ... contact plate (contact member)

Claims (8)

A yoke housing that rotatably accommodates the armature;
A gear housing including a housing portion that houses a first gear rotated by the armature and a second gear meshed with the first gear and provided with a movable conductive plate integrally rotating on one end surface. When,
A brush holder that is sandwiched between the yoke housing and the gear housing, holds a brush for supplying power to the armature, and holds a conductive member that is at least partially connected to the brush;
One end side is connected to the conducting member and the other end projects into the housing space for the second gear in the gear housing through a communication hole that communicates the inside and outside of the housing portion in the gear housing in the rotation axis direction of the armature. A contact member whose other end is slidably contacted with the movable conductive plate;
A grounding terminal formed or connected to the conducting member or the contact member and elastically contacted with the hole wall of the communication hole or the inner surface of the housing portion in the gear housing;
A motor device comprising:   The motor device according to claim 1, wherein the ground terminal is configured as a separate member from the conductive member.   The motor device according to claim 2, wherein the ground terminal is made of a material having good spring property with respect to a constituent material of the conducting member.   The conductive member is formed with a plurality of connecting portions to which the contact member can be connected, and the ground terminal is connected to one of the plurality of connecting portions alone or together with the contact member. The motor device according to claim 2 or claim 3.   5. The motor device according to claim 1, wherein the ground terminal is configured as a separate member from the contact member, and is connected to the contact member or the conducting member.  The motor device according to claim 2, wherein the ground terminal is formed integrally with the contact member.   The motor device according to claim 6, wherein the ground terminal is formed by cutting and raising a part of the contact member. A yoke housing that rotatably accommodates the armature;
A gear housing including a housing portion that houses a first gear rotated by the armature and a second gear meshed with the first gear and provided with a movable conductive plate integrally rotating on one end surface. When,
A brush holder that is sandwiched between the yoke housing and the gear housing, holds a brush for supplying power to the armature, and holds a conductive member that is at least partially connected to the brush;
One end side is connected to the conducting member and the other end projects into the housing space for the second gear in the gear housing through a communication hole that communicates the inside and outside of the housing portion in the gear housing in the rotation axis direction of the armature. A contact member whose other end is slidably contacted with the movable conductive plate;
A ground terminal portion formed by cutting and raising a part of the contact member and elastically contacting the inner surface of the gear housing;
A motor device comprising:

Images