JP4943781B2 - Electric motor brush holder and electric motor - Google Patents

Description

  The present invention includes a holder main body that holds a pair of brushes that are disposed inside a motor housing and that is in sliding contact with a commutator, and a power feeding connector portion that is disposed outside the motor housing and is detachably connected to an external connector. The present invention relates to a brush holder for an electric motor and an electric motor.

  Conventionally, an electric motor with a brush is often used as a drive source for a power window device or a sunroof device provided in a vehicle. Such an electric motor with a brush has a motor yoke (motor housing) in which a pair of magnets are fixed to an inner peripheral surface, and an amateur rotatably accommodated in the motor yoke. The amateur coil is provided. The coil ends of these amateur coils are respectively connected to corresponding segments (commutator pieces) of the commutator (commutator), and this commutator is fixed to the amateur shaft and rotates together with the amateur shaft. Further, a resin brush holder is disposed inside the motor yoke, and a pair of brushes that are in sliding contact with the commutator are held by the brush holder. And when electric power is supplied to each brush from a power supply, this electric power is supplied to an amateur coil via a commutator, and an amateur shaft rotates.

  In addition, conventionally, a power supply connector portion is integrally formed on the holder body of the brush holder via a connecting portion, and an external connector from a power source is connected to this connector portion to supply power to each brush. Technology is known. In this case, a pair of lead members formed of a conductive metal plate such as a steel plate are embedded side by side in the brush holder by insert molding using a molding die, and the power supply terminal of the external connector connected to the connector portion is These brushes are connected to the brushes via these lead members.

  By the way, in an electric motor with a brush, the sliding contact portion between the brush and the commutator may become a source of electromagnetic noise when the brush is energized, and this noise may interfere with other electrical components (radio noise). Etc.) is necessary. For this reason, for example, in the electric motor disclosed in Patent Document 1, a choke coil (noise prevention element) is connected between a terminal and a brush arranged on the holder body side of the lead member, and the choke coil rides on the power supply circuit. The noise is absorbed to prevent the emission of noise to the outside of the motor. In this case, the choke coil is mounted on the element mounting portion provided on the holder body of the brush holder in parallel with the axial direction of the commutator, and each coil end extending from both ends in the axial direction is disposed at a predetermined position of the holder body. The lead members are connected to each other.

On the other hand, the choke coil may not be provided depending on the specifications required for the electric motor. In this case, the terminal of each lead member arranged in the holder body is connected to the corresponding brush by wiring or the like.
JP 2003-79109 A

  However, in the electric motor shown in Patent Document 1, the holder main body side terminal of each lead member arranged in the brush holder and each brush are provided by being shifted in the axial direction, and these are arranged in parallel with the axial direction. Since the connection is made by a coil, when this brush holder is diverted to an electric motor with a specification that does not require a choke coil, each lead member and each brush absorb each axial displacement. A terminal plate for connecting the lead members is prepared separately, and the terminal plate is mounted on the element mounting portion. For this reason, the power supply circuit of the brush holder is designed according to the specification including the choke coil, and the wiring path is long and complicated, which hinders the miniaturization of the brush holder.

  An object of the present invention is to provide a brush holder capable of simplifying the wiring provided in the holder main body in any specification with or without a noise preventing element.

  A brush holder for an electric motor according to the present invention includes a holder main body that holds a pair of brushes that are disposed inside a motor housing and are in sliding contact with a commutator, and a power supply that is disposed outside the motor housing and is detachably connected to an external connector. A brush holder for an electric motor comprising: a base wall provided with a through-hole through which the commutator is inserted, orthogonal to the axial direction of the commutator; A connector-side terminal disposed on the first side, a first terminal disposed on one side in the axial direction of the commutator with respect to the base wall of the holder body, and a first terminal disposed on the other side. The commutator with respect to the base wall of the holder body A second lead member having a first terminal arranged on one side in the axial direction and a second terminal arranged on the other side; and the base wall penetrates in the axial direction of the commutator to the holder body. It is mounted on an element mounting portion provided, and has a noise preventing element connected between one of the brushes and one side terminal or the other side terminal of the first or second lead member.

  The brush holder of the electric motor of the present invention is characterized in that a pair of the element mounting portions are provided in the holder body.

  In the brush holder of the electric motor according to the present invention, the noise preventing element is a choke coil, and the choke coil is mounted on the element mounting portion in parallel with the axial direction of the commutator.

  In addition, the electric motor of the present invention includes a holder body that holds a pair of brushes that are disposed inside the pair of motor housings and that is in sliding contact with the commutator, and a power feeding that is disposed outside the motor housing and is detachably connected to an external connector. An electric motor comprising a brush holder comprising a connector part for a base wall, wherein the brush holder is provided in the holder main body perpendicular to the axial direction of the commutator, and has a through wall through which the commutator is inserted A connector-side terminal disposed in the connector portion, a one-side terminal disposed on one side in the axial direction of the commutator with respect to the base wall of the holder body, and a second-side terminal disposed on the other side A first lead member comprising: a connector-side terminal disposed on the connector portion; and the base wall of the holder body. A second lead member having one terminal arranged on one side in the axial direction of the commutator and the other terminal arranged on the other side, and penetrating the base wall in the axial direction of the commutator. A noise preventing element that is mounted on an element mounting portion provided in the holder body and connected between one of the brushes and one or the other terminal of the first or second lead member, The brush holder is sandwiched and fixed between the pair of motor housings.

  According to the present invention, the terminal of the first and second lead members is provided on both sides on the one side and the other side in the axial direction with respect to the base wall of the holder body. Since the noise prevention element is mounted, the wiring from each brush is selectively used as the terminal of the lead member on one side or the other side in the axial direction of the base wall depending on the presence or absence of the noise prevention element. Can be connected to. Thereby, in each specification of the presence or absence of a choke coil, a wiring path can be simplified.

  Further, according to the present invention, the holder main body is provided with a pair of element mounting portions, and the noise prevention elements are respectively mounted on these element mounting portions. A noise prevention element can be provided.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  1A and 1B are a front view and a side view showing a power window motor having a brush holder according to an embodiment of the present invention, and FIG. 2 is a power window motor shown in FIG. FIG.

  A power window motor 11 shown in FIGS. 1 (a) and 1 (b) is used as a drive source of a power window device provided in a vehicle (not shown), and is mounted inside a door of a vehicle body via a regulator (not shown). Open and close the window glass.

  The power window motor 11 includes a motor main body 12 and a speed reducer 13, which are an electric motor with a speed reducer assembled as a unit, and the operation control is performed by a control device 14 mounted on the vehicle. It has become.

  The motor body 12 is a so-called brushed electric motor. As shown in FIG. 2, the motor body 12 includes a motor yoke 15 as a motor housing having a oval cross section and a bottomed cylindrical shape. A pair of magnets 16 are fixed to the peripheral surface. An armature 17 (armature) is accommodated in the motor yoke 15 so as to face these magnets 16. The amateur 17 has an amateur shaft (rotating shaft) 18 and an armature core 19 fixed to the armature shaft 18, and one end of the armature shaft 18 is supported by a bearing 21 provided at the bottom of the motor yoke 15. The amateur 17 is rotatable inside the motor yoke 15. A plurality of slits 19a are formed in the amateur core 19, and a plurality of amateur coils 22 are wound around the slits 19a by overlapping winding. Further, a commutator (commutator) 23 is fixed to the armature shaft 18 adjacent to the armature core 19, and the coil ends of each armature coil 22 are electrically connected to corresponding segments 23 a of the commutator 23, respectively. .

  The motor main body 12 is provided with a power feeding device 24 in order to supply power to the commutator 23. The power feeding device 24 has a pair of brushes (details will be described later) that are in sliding contact with the outer peripheral surface of the commutator 23. When a direct current is supplied to these brushes, the direct current is commutated by the commutator 23. It flows through each amateur coil 22. When a direct current flows through the amateur coil 22, an electromagnetic force is generated between the armature core 19 and the magnet 16, and the armature 17 is rotated by this electromagnetic force. Details of the power feeding device 24 will be described later.

  On the other hand, the speed reducer 13 has a gear case 25 as a motor housing. The gear case 25 is fixed to the opening end of the motor yoke 15 by a fastening member (bolt) and closes the opening of the motor yoke 15. The armature shaft 18 of the motor body 12 protrudes from the motor yoke 15 into the gear case 25, and the protruding base end portion and the tip end portion thereof are rotatably supported by the gear case 25 by bearings 26a and 26b. A worm 27 is integrally formed on the outer peripheral surface of the portion of the amateur shaft 18 that protrudes into the gear case 25, and a worm wheel 28 that meshes with the worm 27 is rotatably accommodated inside the gear case 25. An output shaft 29 extending in a direction orthogonal to the armature shaft 18 is fixed to the shaft center 28. The front end portion of the output shaft 29 protrudes from the gear case 25, and the front end portion protruding from the gear case 25 is connected to a regulator (not shown). As a result, when the motor body 12 is actuated and the armature shaft 18 is rotated, the rotation is decelerated to a predetermined number of rotations by the decelerating mechanism by the worm 27 and the worm wheel 28 and transmitted to the output shaft 29, and the output shaft 29 The window glass is driven to open and close through the regulator by the rotation of. The gear case 25 is integrally formed with a pair of engaging projections 25a that can be engaged with engaging recesses 36d and 36e provided in a brush holder 31 described later.

  The output shaft 29 supported by the gear case 25 is arranged so that the axial direction is aligned with the direction in which the thickness dimension of the motor yoke 15 formed in an oval cross section is thin. As a result, the power window motor 11 is formed in a flat shape with a small thickness dimension L in the axial direction of the output shaft 29 as shown in FIG. The gear case 25 is integrally provided with a plurality of mounting legs 25b. The power window motor 11 is disposed in a door that forms a part of a thin wall of the vehicle with the axial direction of the output shaft 29 directed inward and outward of the door, that is, in the thickness direction of the door. The surface of the leg portion 25b opposite to the direction in which the output shaft 29 protrudes is fixed to the inner panel of the door (not shown) by fastening means such as bolts, so that it is fixed inside the door.

  3A and 3B are perspective views showing details of the power feeding device shown in FIG. 2, FIG. 4A is a plan view of the power feeding device shown in FIG. 2, and FIG. 4B is FIG. It is a rear view of the electric power feeder shown in FIG.

  As shown in FIGS. 3 and 4, the power supply device 24 provided in the power window motor 11 includes a resin brush holder 31, and the brushes 32 a and 32 b and the power supply circuit 33 are provided in the brush holder 31. Thus, the power feeding device 24 is obtained.

  The brush holder 31 is made of resin formed by injection molding of a resin material, and has a structure in which a holder main body 34, a connecting portion 35, and a connector portion 36 are integrally formed. The holder main body 34 includes a ring portion 34a formed in a substantially oval shape along the opening end of the motor yoke 15, a pair of side walls 34b extending from the ring portion 34a in the axial direction of the armature shaft 18, and the side walls 34b. A base wall 34 c formed orthogonal to the axial direction of the armature shaft 18, that is, the axial direction of the commutator 23, is provided at the end opposite to the ring portion 34 a, and the ring portion 34 a and the connecting portion 35 are connected to the motor yoke 15. Between the motor case 15 and the gear case 25, and is fixed to the motor body 12. A through hole 37 is formed in the axial center portion of the base wall 34 c, and the commutator 23 is inserted into the through hole 37 and arranged inside the holder main body 34.

  As shown in FIGS. 3B and 4B, the base ends of the pair of leaf springs 38a and 38b are fixed to the base wall 34c by screw members 41, and the distal ends of these leaf springs 38a and 38b are fixed. The above-described brushes 32a and 32b are attached to each. These brushes 32a and 32b are in sliding contact with the outer peripheral surface of the commutator 23 while being elastically biased by the leaf springs 38a and 38b. That is, the brushes 32a and 32b are held by the holder body 34 and are commutator. 23 is in sliding contact with the outer peripheral surface.

  The connecting portion 35 is formed to extend from the ring portion 34a of the holder main body 34 to the radially outer side of the commutator 23, and protrudes from the motor yoke 15 and the gear case 25 to the outside of the motor yoke 15 as shown in FIG. And is connected to the connector portion 36 at the tip. In other words, the connecting portion 35 connects the holder main body 34 arranged inside the motor main body 12 and the connector portion 36 arranged outside the motor main body 12 inside and outside the motor main body 12.

  5A is a cross-sectional view showing the internal structure of the connector portion, and FIG. 5B is a cross-sectional view taken along line AA shown in FIG. 5A.

  As shown in FIG. 1, the connector portion 36 is disposed adjacent to the outside of the motor yoke 15, and this connector portion 36 is connected to an external connector 42 from the control device 14 to supply power from the control device 14. It is for power feeding to be supplied to each brush 32a, 32b. As shown in FIG. 5, the connector portion 36 is formed in a box shape having a rectangular cross section with one end opened, and a connection recess 36 b is formed inside the outer peripheral wall 36 a, and the connection recess 36 b is formed in the commutator 23. It opens toward the worm wheel 28 side as viewed from the armature shaft 18 in the radial direction. On the other hand, the external connector 42 from the control device 14 is formed in a convex shape. As shown in FIG. 1, the external connector 42 is pushed into the connection concave portion 36b from the axial direction, thereby connecting the connection concave portion 42b. It is connected to the connector part 36 in the state accommodated in 36b. In addition, the external connector 42 can be detached from the connector portion 36 by pulling the external connector 42 while operating a release button (not shown) provided on the external connector 42. That is, the connector part 36 is detachably connected to the external connector 42.

  A connecting piece 36c extending toward the gear case 25 in parallel to the axial direction of the commutator 23 is provided at the base end of the connector section 36. The connector section 36 is connected to the distal end of the connecting section 35 at the connecting piece 36c. As a result, the connector portion 36 is displaced from the holder main body 34 toward the bottom side of the motor yoke 15 to prevent interference with the gear case 25.

  A pair of engaging recesses 36d and 36e are provided between the outer peripheral wall 36a of the connector portion 36 and the connecting piece 36c, and can be engaged with the engaging protrusion 25a of the gear case 25. Thus, the gear case 25 can effectively receive a load when the external connector 42 is attached to and detached from the connector portion 36.

  6 is a perspective view showing the entire structure of the power feeding circuit, and FIG. 7 is a perspective view showing details of the first and second lead plates shown in FIG.

  The power feeding circuit 33 is a circuit for connecting the external connector 42 connected to the connector portion 36 and the brushes 32a and 32b to supply power from the external connector 42 to the brushes 32a and 32b. As shown in FIG. 6, a first lead plate 43 as a first lead member and a second lead member are connected to the power feeding circuit 33 in order to electrically connect the connector portion side and the holder main body side. The second lead plate 44 is provided.

  As shown in FIG. 7, the first lead plate 43 is formed by punching a metal plate having conductivity such as a steel plate or a copper plate into a predetermined shape and bending it into a predetermined shape. A main body 43a bent in the shape of "", a connector side terminal 43b extending from one end of the main body 43a, and a front side power supply as one side terminal extending from the other end of the main body 43a to one side of the commutator 23 in the axial direction. A terminal 43c and a back side power supply terminal 43d as the other side terminal extending from the other end of the main body 43a to the other side in the axial direction of the commutator 23 are provided. Similarly, the second lead plate 44 is formed by punching a metal plate having conductivity, such as a steel plate or a copper plate, into a predetermined shape and bending it into a predetermined shape. A main body portion 44a bent to one end, a connector side terminal 44b extending from one end of the main body portion 44a, a front side power supply terminal 44c as one side terminal extending from the other end of the main body portion 44a to one side in the axial direction of the commutator 23, A back-side power supply terminal 44d as the other-side terminal extending from the other end of the main body 44a to the other side in the axial direction of the commutator 23 is provided.

  These lead plates 43 and 44 are insert-molded in the brush holder 31 across the holder main body 34, the connecting portion 35 and the connector portion 36 in the main body portions 43 a and 44 a so that the main body portions 43 a and 44 a are aligned with each other. It is buried by. As shown in FIGS. 2 and 5, the connector side terminals 43 b and 44 b of the lead plates 43 and 44 have a width direction that coincides with the axial direction of the commutator 23 and a thickness direction that is the axis of the output shaft 29. The connector portion 36 protrudes into the connection recess 36b so as to match the direction, and the protruding portion forms a terminal portion. Further, the connector side terminal 43b of the first lead plate 43 is bent along the second lead plate 44 at an intermediate portion thereof, whereby the connector side terminals 43b and 44b protruding to the connector portion 36 are mutually connected. They are arranged in the width direction. Therefore, for example, each connector side terminal 43b, 44b has the thickness direction aligned with the axial direction of the commutator 23 and accommodates these connector side terminals 43b, 44b as compared with the case where they are arranged side by side in the width direction. Thus, the thickness dimension of the connector portion 36 facing the axial direction of the output shaft 29 can be reduced.

  On the other hand, the main body portions 43a and 44a of the first and second lead plates 43 and 44 are twisted at right angles with respect to the connector side terminals 43b and 44b at the base ends of the connector portions 36, respectively, with reference to the axis. As can be seen from the above, inside the connecting portion 35, the width direction thereof coincides with the axial direction of the output shaft 29 and is arranged in the width direction, and the thickness direction thereof coincides with the axial direction of the commutator 23. Is arranged. Thereby, the dimension which faces the axial direction of the commutator 23 of the connection part 35 can be reduced, and the connection part 35 can be formed thinly. That is, in order to reduce the thickness dimension of the connector portion 36 facing the output shaft 29 in the axial direction, the connector-side terminals 43b and 44b of the lead plates 43 and 44 formed in a plate shape are arranged in the width direction in the axial direction of the commutator 23. And the body portion 43a, 44a is twisted at a right angle with respect to the connector center terminals 43b, 44b even if they are arranged so that the thickness direction thereof coincides with the axial direction of the output shaft 29. Accordingly, the thickness direction of the main body portions 43a and 44a in the connecting portion 35 can be made to coincide with the axial direction of the commutator 23, so that the thickness of the commutator 23 in the connecting portion 35 can be reduced.

  As described above, in the brush holder 31, the connector side terminals 43b and 44b are arranged in the width direction in the axial direction of the commutator 23 and arranged side by side in the width direction, and the main body portions 43a and 44a are arranged in the connector side terminal 43b. , 44b are twisted at right angles with respect to the axial center, so that these body portions 43a, 44a are aligned in the axial direction of the commutator 23 in the connecting portion 35 and aligned in the width direction, and the thicknesses thereof. Since the direction is arranged to coincide with the axial direction of the output shaft 29, the thickness dimension of the connector portion 36 is reduced and the axial dimension of the power window motor 11 provided with the brush holder 31 is reduced. The motor 11 can be reduced in size.

  In the brush holder 31, the connector portion 36 is opened toward the radially outer side of the commutator 23, so that the workability of attaching and detaching the external connector 42 to the connector portion 36 in the power window motor 11 can be improved. it can.

  Further, in this brush holder 31, the axial center of the connector portion 36 is shifted in the axial direction of the commutator 23 with respect to the axial center of the connecting portion 35, so that the gear case 25 fixed to the motor yoke 15, other members, etc. The connector portion 36 can be disposed without interfering with the connector.

  Further, in this power window motor 11, since the engaging recesses 36d and 36e of the connector portion 36 of the brush holder 31 and the engaging protrusion 25a of the gear case 25 are engaged, the external connector 42 is connected to the connector portion 36. The load at the time of attachment / detachment can be effectively received by the gear case 25.

  As shown in FIGS. 3A and 4A, the front-side power supply terminals 43c and 44c of the lead plates 43 and 44 are on one side in the axial direction of the commutator 23 with respect to the base wall 34c of the holder body 34, respectively. That is, it protrudes along the front side of the brush holder 31, and each protruding portion functions as a terminal for connecting the connector side terminals 43 b and 44 b to a circuit provided on the front side of the brush holder 31. Further, the back-side power supply terminals 43d and 44d of the lead plates 43 and 44 protrude side by side on the other side in the axial direction of the commutator 23, that is, on the back side of the brush holder 31, respectively, with respect to the base wall 34c of the holder body 34. The protruding portion of the connector functions as a terminal for connecting the connector side terminals 43b and 44b to a circuit provided on the back side of the brush holder 31. That is, the first and second lead plates 43 and 44 are connected to the corresponding brushes 32a and 32b in either the front-side power supply terminals 43c and 44c or the back-side power supply terminals 43d and 44d as the holder body side terminals. It has become.

  FIG. 8 is a cross-sectional view showing a brush holder forming apparatus, and FIG. 9 is a side view showing an arrangement state of each lead plate inside the brush holder. 10 is a cross-sectional view showing details of the holding portion provided in the second mold, and FIG. 11 is a cross-sectional view showing details of the exposure hole formed in the connecting portion by the holding portion shown in FIG. . Next, a method of manufacturing the brush holder 31 in which the lead plates 43 and 44 are embedded will be described with reference to FIGS.

  The molding device 51 of the brush holder 31 includes a first molding die 52 and a second molding die 53, and the second molding die 53 is in the axial direction of the commutator 23 with respect to the first molding die 52. Relative movement is possible in the direction of approaching and separating along. Further, the molding device 51 is provided with a slide mold 54 for forming the connection recess 36 b in the connector portion 36, and this slide mold 54 is orthogonal to the relative movement direction of the first and second molding dies 52, 53. When the first mold 52, the second mold 53, and the slide mold 54 are combined, a molding chamber 55 is formed between the molds 52, 53, and 54. It is like that.

  The first mold 52 is provided with a pair of holding holes (details are not shown) side by side, and the front-side power supply terminals 43c and 44c of the lead plates 43 and 44 are inserted into the corresponding holding holes at the tip portions thereof. Thus, the first mold 52 is held. Similarly, a pair of holding holes (details are not shown) are provided side by side in the second mold 53, and the back-side power supply terminals 43d and 44d of the lead plates 43 and 44 correspond to the corresponding holding holes at the tip portions thereof. Thus, it is held by the second mold 53. Similarly, the slide mold 54 is provided with a pair of holding holes (details not shown) arranged side by side, and the connector side terminals 43b and 44b of the lead plates 43 and 44 are inserted into the corresponding holding holes at the tip portions thereof. Thus, the slide mold 54 is held. As a result, as shown in FIG. 8, the first and second lead plates 43 and 44 have their front-side power supply terminals 43c and 44c held by the first molding die 52 at their tips, respectively, The terminals 43d and 44d are held by the second molding die 53 at their tip portions, and the respective connector side terminals 43b and 44b are held by the slide die 54 at their tip portions, and are aligned with each other inside the molding chamber 55. Placed in.

  In addition, the second molding die 53 of the molding device 51 includes the terminals 43a and 44a of the lead plates 43 and 44 embedded in the connecting portion 35, that is, the terminals held by the molds 52 to 54. In the intermediate portion, a holding portion 56 is provided to hold the lead plates 43 and 44 disposed inside the molding chamber 55. The holding portion 56 protrudes from the main body of the second molding die 53 toward the first molding die 52 and comes into contact with one outer surface in the thickness direction of each of the lead plates 43 and 44, and a first projection piece 56a. The first protruding piece 56a further includes a second protruding piece 56b that protrudes toward the first mold 52 and is disposed between the first lead plate 43 and the second lead plate 44. The lead plate 43 and the second lead plate 44 are restricted from moving in the axial direction by the first projecting piece 56a, and the second projecting piece 56b is sandwiched therebetween so that the distance between them is maintained. ing.

  When the first and second lead plates 43 and 44 are arranged in the molding chamber 55, it is a mating surface between the first molding die 52 and the second molding die 53, on the first molding die 52 side. The molten resin material is injected into the molding chamber 55 from the injection hole 57 provided. When the molten resin material is injected into the molding chamber 55 from the injection hole 57, the resin material is filled into the molding chamber 55, and the holder main body 34, the connecting portion 35, and the connector portion 36 are integrated with each other by this resin material. The formed brush holder 31 is insert-molded. At this time, a slide die 54 protrudes from a portion of the molding chamber 55 where the connector portion 36 is molded, and the slide die 54 forms a connection recess 36 b inside the connector portion 36. In addition, the resin material does not enter the holding holes provided in the respective molds 52 to 54, so that the tip portions held in the holding holes of the first and second lead plates 43 and 44 are The portions held in the holding holes protrude from the holder main body 34 and the connector portion 36 to form terminals. Further, the brush holder 31 is molded in a state where the main body portions 43a and 44a are held by the holding portion 56, so that each lead plate is connected to the connecting portion 35 of the molded brush holder 31 as shown in FIG. An exposure hole 58 for exposing a part of the main body portions 43a, 44a to the outside is formed, and a gap 59 is formed between the main body portions 43a, 44a of the lead plates 43, 44 exposed from the exposure hole 58. It is formed.

  As described above, in the brush holder 31, the brush plates 31 and 44 are held in the molding chamber 55 at the three points of the connector side terminals 43b and 44b, the front side power supply terminals 43c and 44c, and the back side power supply terminals 43d and 44d. Since the insert molding of the holder 31 is performed, it is possible to suppress displacement and deformation of the lead plates 43 and 44 embedded in the brush holder 31 at the time of injection molding. Therefore, it is possible to prevent the lead plates 43 and 44 from coming into contact with each other inside the brush holder 31 and prevent them from causing an insulation failure. In addition, since the insulation failure of each lead plate 43, 44 can be prevented in the process of insert molding the brush holder 31, the other steps for preventing the insulation failure of each lead plate 43, 44 are unnecessary. The number of processing steps can be reduced, thereby reducing the cost of the brush holder 31.

  Further, in the brush holder 31, in addition to the three points of the connector side terminals 43b and 44b, the front side power supply terminals 43c and 44c, and the back side power supply terminals 43d and 44d, the main body portions 43a and 44a of the lead plates 43 and 44 are held. Since the holding portion 56 is provided, the intermediate portion of each terminal is held in the molding chamber 55 by the holding portion 56, so that the insulation failure of each lead plate 43, 44 at the time of injection molding can be further reliably prevented. .

In the power window motor 11, in order to ensure the insulation of each lead plate 43, 44, the exposure hole 58 formed in the connecting portion 35 after the molding of the brush holder 31 is formed by a sealant or the like. It is trying to block.
Furthermore, it may be configured such that the portions for holding the main body portions 43a, 44a of the lead plates 43, 44 are positioned to be sandwiched by the motor housing when the brush holder 31 is formed.

  FIG. 12 is a perspective view showing details of the choke coil, and FIG. 13 is a cross-sectional view showing details of one element mounting portion.

  In order to absorb noise generated by the sliding contact between the brushes 32a and 32b and the commutator 23, the power feeding circuit 33 is provided with a pair of choke coils 61 and 62 as noise preventing elements. As shown in FIG. 12, these choke coils 61 and 62 include coil bodies 61a and 62a around which conductive wires are wound around cylindrical iron cores 61d and 62d, respectively, and one end in the axial direction of the coil bodies 61a and 62a. The first connection lines 61b and 62b are drawn out in the tangential direction of the coil bodies 61a and 62a, and the second connection lines 61c and 62c are drawn out in the axial direction of the coil bodies 61a and 62a from the other end in the axial direction. ing.

  As shown in FIGS. 3 and 4, in order to mount the choke coils 61 and 62 on the brush holder 31, the brush holder 31 is provided with a pair of element mounting portions 63 and 64. One element mounting portion 63 is disposed at a symmetrical position with respect to the coupling portion 35 with the axis of the holder body 34 as the center, and has a semi-cylindrical shape that penetrates the base wall 34 c in the axial direction of the commutator 23. It is formed integrally with the holder body 34. The other element mounting portion 64 is disposed adjacent to one element mounting portion 63 and is formed integrally with the holder main body 34 in a cylindrical shape penetrating the base wall 34 c in the axial direction of the commutator 23. ing.

  The choke coil 61 is inserted in the element mounting portion 63 in the axial direction from the insertion side end portion which is the front side of the brush holder 31, whereby the choke coil 61 is mounted on the element mounting portion 63 in parallel with the axial direction of the commutator 23. Is done. At this time, the choke coil 61 is inserted into the element mounting portion 63 from the other end side in the axial direction, that is, the side from which the second connection line 61c protrudes. As a result, as shown in FIG. 13, the first connection line 61 b of the choke coil 61 mounted on the element mounting portion 63 is connected to the brush holder 31 from the lead-out portion 63 a formed at the insertion side end of the element mounting portion 63. The second connection line 61 c is drawn from the element mounting portion 63 to the back side of the brush holder 31. Similarly, the choke coil 62 is inserted into the other element mounting portion 64 from the insertion side end portion on the front side of the brush holder 31 in the axial direction, so that the choke coil 62 is parallel to the axial direction of the commutator 23. 64. At this time, the choke coil 62 is inserted into the element mounting portion 64 from the other end side in the axial direction, that is, the side from which the second connection line 62c protrudes. As a result, the first connection line 62b of the choke coil 62 mounted on the element mounting portion 64 is pulled out to the front side of the brush holder 31 from the lead-out portion 64a formed at the insertion side end of the element mounting portion 64. The second connection line 62 c is drawn from the element mounting portion 64 to the back side of the brush holder 31.

  As shown in FIG. 6, the first connection line 61b of the choke coil 61 mounted on one element mounting portion 63 is connected to one end of a lead plate 65 that penetrates the back and front of the base wall 34c. The other end of the first lead plate 43 is connected to the back-side power supply terminal 43 d of the first lead plate 43 through a circuit breaker 66 and a lead plate 67. The second connecting wire 61c of the choke coil 61 is connected to one end of a lead plate 68 disposed on the back surface of the base wall 34c, and the other end of the lead plate 68 is a screw member together with a leaf spring 38a of one brush 32a. 41 is fixed to the holder main body 34. That is, the choke coil 61 is connected between the back-side power supply terminal 43d of the first lead plate 43 and the one brush 32a via the lead plates 65, 67, 68, the circuit breaker 66, and the leaf spring 38a. On the other hand, the first connection line 62b of the choke coil 62 mounted on the other element mounting portion 64 is connected to the front power supply terminal 44c of the second lead plate 44, and the second connection line 62c is the back surface of the base wall 34c. The other end of the lead plate 69 is fixed to the holder main body 34 by the screw member 41 together with the leaf spring 38b of the other brush 32b. That is, the choke coil 62 is connected between the front power supply terminal 44c of the second lead plate 44 and the other brush 32b via the lead plate 69 and the leaf spring 38b. In this way, when the power supply circuit 33 is configured in the brush holder 31 and power is supplied from the control device 14 to the connector-side terminals 43b and 44b via the external connector 42, the brushes 32a are connected via the power supply circuit 33. , 32b is supplied with power and the power window motor 11 is activated. Further, by changing the direction of the current supplied from the control device 14, the polarity of each brush 32a, 32b is reversed, and the power window motor 11 can be operated in both forward and reverse directions.

  Each lead plate 65, 67, 68, 69 is formed of a conductive metal plate such as a steel plate or a copper plate.

  As shown in FIG. 3A and FIG. 4A, in order to arrange and hold the first connection line 61b of the choke coil 61 mounted on one element mounting portion 63 at a predetermined position of the brush holder 31, The brush holder 31 is provided with a first guide portion 71. The brush holder 31 is provided with a second guide portion 72 in order to place and hold the first connection line 62b of the choke coil 62 attached to the other element attachment portion 64 at a predetermined position of the brush holder 31. ing.

  The base wall 34c of the brush holder 31 is provided with a pair of cylindrical portions 73 and 74 that project from the base wall 34c in the axial direction of the commutator 23 toward the front side of the brush holder 31 integrally with the base wall 34c. The one cylindrical portion 73 is disposed adjacent to the one element mounting portion 63, and the first guide portion 71 is provided at the tip of the cylindrical portion 73. The other cylindrical portion 74 is disposed adjacent to the front power supply terminal 43 c of the first lead plate 43, and the second guide portion 72 is provided at the tip of the cylindrical portion 74.

  Since the first guide portion 71 and the second guide portion 72 have basically the same structure, the structure of these guide portions 71 and 72 will be described below based on the first guide portion 71. I will explain.

  FIG. 14 is a cross-sectional view showing details of the first guide portion. As shown in FIG. 14, the first guide portion 71 is located between the pair of guide walls 71a and 71b and the guide walls 71a and 71b. And a groove 71c to be formed. The inner side surfaces of the respective guide walls 71a and 71b are inclined in a direction gradually separating from each other toward the tip end side in the axial direction of the columnar portion 73, so that the groove portion 71c has a substantially sectional shape with a wide width on the opening side. It is formed in a V shape. Further, the end portions on the opening side of the guide walls 71a and 71b, that is, the tip portions in the axial direction are on the insertion direction side of the choke coil 61 with respect to the lead-out portion 63a provided at the insertion side end portion of one element mounting portion 63. Highly formed. Further, the groove 71 c is formed in a loose curved shape along the ring portion 34 a of the brush holder 31. Then, the first connection line 61 b of the choke coil 61 mounted on one element mounting portion 63 is pulled out from the lead-out portion 63 a of the element mounting portion 63 and routed in the groove portion 71 c of the first guide portion 71. Thus, the groove 71c is held by the pair of guide walls 71a and 71b. Similarly, the first connection line 62b of the choke coil 62 attached to the other element attachment portion 64 is drawn from the lead portion 64a of the element attachment portion 64 and routed to the groove portion 72c of the second guide portion 72. Thus, the groove 72c is held by the pair of guide walls 72a and 72b. In addition, as shown in FIG. 4, the end of the guide wall 71 b of the first guide portion 71 on the element mounting portion 63 side is a corner where the first connection line 61 b first abuts when the choke coil 61 is assembled. A portion 71d is provided.

  Here, the first guide portion 71 is formed higher on the insertion direction side of the choke coil 61 than the lead portion 63a of the element mounting portion 63 to which the choke coil 61 is mounted. When the choke coil 61 is temporarily held, that is, before the choke coil 61 is completely inserted into the element mounting portion 63, the first connection line 61b is connected to the element of the first guide portion 71. It can be engaged with the corner 71d on the mounting portion 63 side. Therefore, after the choke coil 61 is mounted on the element mounting portion 63, the first connecting wire 61b can be easily formed without the need for operations such as deforming the first connecting wire 61b and engaging with the first guide portion 71. Can be engaged with the first guide portion 71.

  As described above, in the power feeding device 24, the first guide portion 71 that holds the first connection line 61 b is arranged on the side of the choke coil 61 in the insertion direction from the lead-out portion 63 a of the element mounting portion 63 to which the choke coil 61 is mounted. Since the choke coil 61 is inserted into the element mounting portion 63, the first connection line 61b can be easily engaged with the first guide portion 71. Thereby, the assembly | attachment property of the choke coil 61 to the brush holder 31 can be improved.

  In the power feeding device 24, the first guide portion 71 that holds the first connection line 61b is higher in the insertion direction side of the choke coil 61 than the lead-out portion 63a of the element mounting portion 63 to which the choke coil 61 is mounted. Since the first connecting line 61b is engaged with the corner 71d of the first guide 71, the first connecting line 61b is easily deformed from the state with the corner 71d as a fulcrum (forming. ). Accordingly, it is possible to easily form the choke coil 61 while holding the first connecting wire 61b on the first guide portion 71, and to improve the assembling property of the choke coil 61 to the brush holder 31. .

  Further, in the power feeding device 24, the first connection line 61 b of the choke coil 61 is held by the first guide portion 71, so that the first connection line 61 b is provided on the brush holder 31 and has a different polarity. It is possible to improve the insulating property of the choke coil 61 by preventing contact with the choke coil 61. In particular, if the first guide portion 71 is provided with a pair of guide walls 71a and 71b and a groove portion 71c, the first connection line 61b can be reliably held by the guide walls 71a and 71b, and the guide The walls 71a and 71b can reliably prevent the first connecting wire 61b from coming into contact with the conductive member of the other electrode.

  Further, in this power feeding device 24, the groove 71c of the first guide 71 is formed in a V-shaped cross section, so that the first connection line 61b can be easily connected to the bottom of the groove 71c of the first guide 71. Accordingly, the first connecting wire 61b can be securely held and routed easily.

  FIG. 15 is a cross-sectional view showing the positional relationship between the other element mounting portion and the second to fourth guide portions.

  The brush holder 31 has a first connection line 62b of the choke coil 62 mounted on the other element mounting portion 64, and a side wall of the holder body 34 between the element mounting portion 64 and the second guide portion 72. A third guide portion 75 and a fourth guide portion 76 are provided for holding along 34b. Each of the guide portions 75 and 76 has a structure in which the side wall 34b of the holder body 34 is used as one guide wall, and the groove portions 75b and 76b are provided between the guide walls 75a and 76a provided in parallel therewith. . Further, a corner 75c where the first connection line 62b first comes into contact with the choke coil 62 when the choke coil 62 is assembled is provided at the end of the guide wall 75a of the third guide portion 75 on the element mounting portion 64 side. . The distal end portions of the respective guide walls 75a and 76a are formed higher on the insertion direction side of the choke coil 62 than the lead portion 64a of the other element mounting portion 64. Further, the distal end portions of the guide walls 75a and 76a of the third and fourth guide portions 75 and 76 are higher in the insertion direction side of the choke coil 62 than the distal end portions of the guide walls 72a and 72b of the second guide portion 72. Is formed. That is, in this brush holder 31, the guide walls 72 a and 72 b of the second guide portion 72 far from the lead-out portion 64 a of the other element mounting portion 64 are the third and fourth guide portions 75 that are closer. , 76 is formed higher than the guide walls 75a, 76a on the insertion direction side of the choke coil 62. Thus, when the choke coil 62 is inserted into the element mounting portion 64, the first connection is made before the choke coil 62 is temporarily held, that is, before the choke coil 62 is completely inserted into the element mounting portion 64. The wire 62b can be engaged with the corner portion 75c of the third guide portion 75 on the element mounting portion 64 side. Therefore, after the choke coil 62 is mounted on the element mounting portion 64, the first connecting wire 62b can be easily formed without the need for operations such as deforming the first connecting wire 62b and engaging with the third guide portion 75. Can be engaged with the third guide portion 75. Then, the first connection line 62b disposed in the third guide portion 75 can be sequentially engaged with the fourth guide portion 76 and the second guide portion 72 by the same routing method. That is, when the first connection line 62 b of the choke coil 62 is formed along the guide portions 75, 76, 72, first, the guide wall 75 a of the third guide portion 75 on the side close to the element mounting portion 64. The first connecting line 62b is easily deformed (formed) from the corner 75c as a fulcrum from that state, and similarly in the fourth guide portion 76 portion and the second guide portion 72 portion. In addition, the first connection line 62b can be deformed, and this makes it easy to route the first connection line 62b.

  As described above, in the power feeding device 24, the plurality of guide portions 72, 75, 76 provided on the brush holder 31 are formed higher on the insertion direction side of the choke coil 62 as the distance from the lead portion 64a increases. It is possible to facilitate the routing work when routing the brush 62 on the brush holder 31 while the first connecting wire 62b of the coil 62 is held by the guide portions 72, 75, and 76.

  As shown in FIG. 14, a screw hole 81 that opens to the back surface of the base wall 34 c is formed at the base end of the cylindrical portion 73 where the first guide portion 71 is provided in parallel to the axial direction of the commutator 23. A screw member 41 for fixing the leaf spring 38a to which the brush 32a is attached to the brush holder 31 is screwed to the screw hole 81 in parallel to the axial direction of the commutator 23. Similarly, although not shown in detail, a screw hole that opens to the back surface of the base wall 34c is formed in parallel to the axial direction of the commutator 23 at the base end of the cylindrical portion 74 where the second guide portion 72 is provided. The screw member 41 for fixing the leaf spring 38b to which the brush 32b is attached to the brush holder 31 is screwed into the screw hole parallel to the axial direction of the commutator 23.

  That is, the first guide portion 71 is disposed coaxially with the screw member 41 for fixing the leaf spring 38a to which the one brush 32a is attached to the brush holder 31, and the second guide portion 72 is attached to the other brush 32b. The plate spring 38b is arranged coaxially with the screw member 41 for fixing the leaf spring 38b to the brush holder 31. Thereby, the length of the screw hole 81 can be increased by utilizing the inside of the first and second guide portions 71 and 72, and the axial length of the screw member 41 can be increased, and the leaf spring 38b. Can be securely fixed. Further, the power supply device 24 and the power window motor 11 provided with the power supply device 24 can be downsized without providing a new installation space for the first and second guide portions 71 and 72.

  As described above, in the power supply device 24, the guide portions 71 and 72 are arranged coaxially with the screw member 41 for fixing the leaf springs 38a and 38b to which the brushes 32a and 32b are attached to the brush holder 31. The power supply device 24 of the power window motor 11 can be reduced in size by efficiently arranging the guide portions 71 and 72 in a limited space on the brush holder 31.

  Moreover, in this electric power feeder 24, each guide part 71 and 72 is formed in the front-end | tip of the cylindrical parts 73 and 74 which protrude in the axial direction of the commutator 23 from the base wall 34c of the brush holder 31, and these cylindrical part 73, Since the screw hole 81 into which the screw member 41 is screwed is formed at the base end of 74, the layout of the guide portions 71 and 72 and the screw member 41 is improved, and the power feeding device 24 is further downsized. be able to.

  FIG. 16A is an explanatory view showing the positional relationship between the lead plate connecting portion disposed at the bottom side end of one element mounting portion and the lead portion provided at the insertion side end of the element mounting portion. FIG. 16B is an explanatory diagram showing the relationship between the lead-out positions of the first connection line and the second connection line of the choke coil.

  As shown in FIG. 16A, the lead-out portion 63a provided at the insertion side end of one element mounting portion 63 is a coil of the choke coil 61 mounted on the semi-cylindrical portion of the element mounting portion 63. It is formed in a groove shape along a straight line A passing through the center of the groove portion 71c of the first guide portion 71 adjacent to the main body 61a on the element mounting portion 63 side. As shown in FIG. 13, a bottom wall 82 is provided integrally with the base wall 34 c at the bottom side end of one element mounting portion 63, and the second wall of the choke coil 61 is provided on the bottom wall 82. A connecting portion 68a of a lead plate 68 serving as a connecting lead member connected to the connecting wire 61c is disposed. As described above, one end of the lead plate 68 is connected to one brush 32a by the screw member 41, and the connecting portion 68a is provided at the other end. A slit 68b through which the second connection line 61c is inserted is formed at the tip of the connection portion 68a. As shown in FIG. 16A, the slit 68b is formed at the bottom of the element mounting portion 63 at the choke. The coil 61 is arranged so as to have a predetermined positional relationship with respect to the lead-out part 63a with reference to the axis of the coil 61, that is, the axis of the element mounting part 63. That is, the mutual positional relationship is defined such that the straight line B passing through the axis of the element mounting portion 63 and the axis of the slit 68b and the straight line A on which the lead-out portion 63a is formed form an angle α.

  On the other hand, as shown in FIG. 16B, in the choke coil 61, the drawing positions of the first connection line 61b and the second connection line 61c with respect to the axis are set to a predetermined positional relationship. . That is, the drawing position a1 of the first connection line 61b and the drawing position a2 of the second connection line 61c as viewed from the axial direction are set to form an angle β with the axis as the center. A straight line C passing through the second connection line 61c and a straight line D indicating the lead-out direction of the first connection line 61b form an angle α. As described above, the positional relationship between the drawing positions a1 and a2 of the first connection line 61b and the second connection line 61c of the choke coil 61 is such that the drawing part 63a provided in the element mounting part 63 and the connection part 68a of the lead plate 68. The positional relationship is the same. Therefore, by inserting the choke coil 61 into the element mounting portion 63 with the first connection wire 61b aligned with the lead-out portion 63a, the first connection wire 61b is engaged with the first guide portion 71, and The two connection wires 61 c can be inserted into the slits 68 b of the connection portions 68 a provided on the lead plate 68.

  Similarly, although not shown in detail, the positional relationship between the lead-out portion 64a of the other element mounting portion 64 and the connection portion 69a of the lead plate 69 serving as a connecting lead member provided on the bottom of the other element mounting portion 64 is also the same. The same positional relationship as in the case of 63 is set. Thus, the choke coil 62 is inserted into the other element mounting portion 64 so that the first connection wire 62b is aligned with the lead portion 64a, whereby the second connection wire 62c is connected to the connection portion 69a provided on the lead plate 69. It can be inserted through the slit. Further, the positional relationship between the lead-out portion 63a provided in one element mounting portion 63 and the first guide portion 71, and the third portion closest to the lead-out portion 64a provided in the other element mounting portion 64 and the element mounting portion 64. The choke coil 62 is inserted into the element mounting portion 64 in alignment with the lead-out portion 64a of the other element mounting portion 64, so that the first connection line 62b is set. Can be engaged with the third guide portion 75.

  As described above, in the power feeding device 24, the positional relationship between the extraction positions a1 and a2 with respect to the axis of the first and second connection lines 61b and 61c of the choke coil 61 and the first connection line 61b are extracted. The positional relationship with respect to the axis of the choke coil 61 is set to be the same between the lead portion 63a to be connected and the connection portion 68a of the lead plate 68 to which the second connection line 61c is connected. Even if the slit 68b of the connecting portion 68a of the lead plate 68 arranged on the bottom side of the 63 and the tip of the second connecting wire 61c of the choke coil 61 cannot be visually observed, the first connecting wire 61b By inserting the choke coil 61 into the element mounting portion 63 in accordance with the lead-out portion 63a, the second connection line 61c can be reliably connected to the connection portion 68a of the lead plate 68.

  In the power feeding device 24, the brush holder 31 is provided with a pair of element mounting portions 63 and 64, and the positional relationship between the connection portions 68a and 69a corresponding to the respective element mounting portions 63 and 64 and the lead-out portions 63a and 64a is determined. Furthermore, the positional relationship between the drawing portion 63a of one element mounting portion 63 and the first guide portion 71 and the relationship between the leading portion 64a of the other element mounting portion 64 and the third guide portion 75 are set. Since the positional relationship is set to be the same, the same choke coils 61 and 62 can be used for these element mounting portions 63 and 64, so that the type of choke coil used for the power feeding device 24 can be changed. The cost of the power feeding device can be reduced.

  Next, a method for attaching the choke coil 61 to the brush holder 31 will be described. The method for mounting the choke coil 62 is basically the same and will not be described.

  First, the first and second connection lines 61b and 61c of the choke coil 61 are formed in advance so that the respective drawing positions have a predetermined positional relationship with respect to the axis.

  Next, the choke coil 61 is inserted into the element mounting portion 63 from the other end side in the axial direction, that is, the side where the second connection line 61c is provided. When the choke coil 61 is temporarily held by the element mounting portion 63, that is, before the choke coil 61 is completely inserted into the element mounting portion 63, the first connection line 61b is connected to the first guide portion. 71 is engaged with a corner 71d.

  When the first connecting wire 61b is engaged with the corner 71d of the first guide portion 71, the choke coil 61 is further inserted into the element mounting portion 63 with the first connecting wire 61b aligned with the lead-out portion 63a. Is done. When the choke coil 61 is abutted against the bottom wall 82 of the element mounting portion 63, the second connection line 61 c is naturally inserted into the slit 68 b of the connection portion 68 a of the lead plate 68. Then, the second connection line 61c inserted through the slit 68b is connected to the connection portion 68a by solder or the like. When the choke coil 61 is attached, the deformation (forming) operation for arranging the first connecting wire 61b in the groove portion 71c of the first guide portion 71 is simultaneously performed as described above.

  17 is a perspective view showing details of the lead plate and connection terminal portions provided on the lead plate, and FIG. 18 is a front view showing an insertion hole through which the lead plate shown in FIG. 17 is inserted, and FIG. ), (B) are cross-sectional views showing the procedure for inserting the lead plate into the insertion hole.

  As shown in FIG. 6, the lead as an insertion lead member that connects the first connection line 61 b of the choke coil 61 arranged on the front side of the brush holder 31 and the circuit breaker 66 protruding to the back side of the brush holder 31. The plate 65 has a main body portion 65a disposed on the back surface of the base wall 34c and an insertion portion 65b that bends at right angles to the main body portion 65a. The main body portion 65a is one of the circuit breakers 66 on the back side of the brush holder 31. Connected to the terminal. On the other hand, the base wall 34c of the brush holder 31 is formed with an insertion hole 91 that passes through the base wall 34c in the axial direction of the commutator 23, and the insertion portion 65b of the lead plate 65 extends from the distal end to the insertion hole. It is inserted through 91 and protrudes to the front side of the brush holder 31. As shown in FIG. 6, the first connection line 61b of the choke coil 61 is connected to a connection terminal portion 92 provided at the tip of the insertion portion 65b on the front side with respect to the base wall 34c. That is, the lead plate 65 is connected to the brush 32a via the choke coil 61 on the front side of the brush holder 31, and on the back side via the circuit breaker 66 and the lead plate 67, the back side feed terminal 43d of the first lead plate 43. It is connected to the.

  Here, as shown in FIG. 18, the insertion hole 91 is formed in a rectangular cross section having a pair of wide inner surfaces 91a and 91b facing both surfaces of the lead plate 65 in the thickness direction. A protrusion 93 having a semicircular cross section is formed. As shown in FIG. 19, the protrusion 93 is integrated with the base wall 34c and is positioned at a substantially middle portion in the width direction of the wide inner surface 91a and from the substantially middle portion in the axial direction of the insertion hole 91 toward the surface side of the base wall 34c. In the opening on the surface side of the base wall 34c, the gap L between the protrusion 93 and the other wide inner surface 91b facing the protrusion 93 is the thickness of the lead plate 65. It is narrower than t. Thus, when the insertion portion 65b of the lead plate 65 is inserted into the insertion hole 91, the protrusion 93 elastically contacts the lead plate 65, that is, elastically deforms in the direction in which the protrusion 93 is crushed, and the elastic force causes the lead The insertion portion 65b of the plate 65 is pressed against the other wide inner surface 91b. Therefore, the insertion part 65b of the lead plate 65 is positioned on the brush holder 31 with the other wide inner surface 91b as a reference, and the friction between the wide inner surface 91b and the protrusion 93 prevents the insertion through the insertion hole 91.

  On the other hand, as shown in an enlarged view in FIG. 17, the connection terminal portion 92 formed at the distal end of the insertion portion 65b on the side inserted through the insertion hole 91 has an axial direction from the distal end of the insertion portion 65b, that is, the insertion portion 65b. A notch groove or slit 94 extending along the direction of insertion through the insertion hole 91 is formed, and the slit 94 is formed at an intermediate portion in the width direction of the insertion portion 65b. It is formed in a fork shape having a protruding portion. Further, a taper surface 95 that chamfers the base portion of the slit 94 is formed on the surface of the connection terminal portion 92 that faces the protrusion 93, and when the insertion portion 65b is inserted into the insertion hole 91, The tapered surface 95 passes over the protrusion 93. When the insertion portion 65b is inserted into the insertion hole 91, the connection terminal portion 92 protrudes to the front side of the base wall 34c, and the first connection line 61b of the choke coil 61 inserted through the slit 94 is connected by solder or the like. Connected to the terminal portion 92.

  Next, a method for attaching the lead plate 65 to the brush holder 31 will be described.

  First, a connection terminal portion 92 having a slit 94 and a tapered surface 95 is formed in advance at the tip of the insertion portion 65b of the lead plate 65, and a protrusion 93 is formed on the wide inner surface 91a of the insertion hole 91 of the brush holder 31. .

  Next, from the back side of the brush holder 31, the insertion portion 65 b of the lead plate 65 on which the connection terminal portion 92 is formed is inserted into the insertion hole 91 so that the tapered surface 95 provided on the connection terminal portion 92 passes over the protrusion 93. The connecting terminal portion 92 is protruded to the front side of the brush holder 31. At this time, the insertion portion 65 b inserted through the insertion hole 91 moves so that the taper surface 95 is brought into contact with the surface of the taper-shaped protrusion 93 and gradually rides on the protrusion 93. Thereby, the connection terminal portion 92 passes through the protrusion 93 without cutting the protrusion 93 integrally formed with the resin holder body 34.

  When the connection terminal portion 92 protrudes to the front side of the brush holder 31, the first connection wire 61 b of the choke coil 61 is connected to the connection terminal portion 92, and the opposite end portion of the lead plate 65 is connected to the circuit breaker 66. Is done.

  As described above, in the power feeding device 24, the taper surface 95 is formed at the base portion of the slit 94 formed at the tip of the lead plate 65, and therefore when the lead plate 65 is inserted into the insertion hole 91. The lead plate 65 gradually rides on the protrusion 93 on the tapered surface 95, and the protrusion 93 is not cut off by the edge of the base portion of the slit 94. Therefore, the lead plate 65 prevents the protrusion 93 from being scraped, and the lead plate 65 is reliably pressed against the other wide inner surface 91b by the protrusion 93, so that the lead plate 65, that is, the connection terminal portion 92 provided at the tip of the lead plate 65 is provided. Positioning can be ensured. Further, since the connection terminal portion 92 is reliably positioned, the connection work of the choke coil 61 to the connection terminal portion 92 can be facilitated.

  Further, since the first connecting wire 61b of the choke coil 61 can be guided to the slit 94 by the tapered surface 95 formed at the base portion of the slit 94, the choke coil 61 to the connecting terminal portion 92 of the lead plate 65 is provided. Can be easily connected.

  FIG. 20 is a perspective view showing a modification of the power feeding circuit shown in FIG.

  6 is provided with a pair of choke coils 61, 62, and the first and second lead plates 43, 44 are connected to the corresponding brushes 32a, 32b via these choke coils 61, 62. Has been. On the other hand, depending on the specifications of the power window motor 11, the choke coils 61 and 62, which are noise prevention elements, may be excluded. In this case, the same brush holder 31 as shown in FIG. A power supply circuit 101 having the configuration is provided.

  Here, in the brush holder 31, the first and second lead plates 43 and 44 that electrically connect the connector portion 36 and the holder main body 34 are a pair of terminals that protrude from the front side and the back side of the brush holder 31, respectively. 43c, 43d, 44c, 44d, and the pair of element mounting portions 63, 64 formed in the holder body 34 are formed so as to penetrate the base wall 34c in the 23-axis direction of the commutator. Depending on the specifications of the presence or absence of the choke coils 61 and 62, the power feeding circuit can be configured with an optimum path. That is, regardless of whether or not the choke coils 61 and 62 are present, the first and second leads are connected regardless of whether the connecting portions to the first and second lead plates 43 and 44 are disposed on the front or back of the brush holder 31. Since the connection to the plates 43 and 44 can be selectively made on either the front or back side of the brush holder 31, the wiring path of the power feeding circuit can be simplified regardless of the presence or absence of the choke coils 61 and 62. It is. For example, in the case shown in FIG. 20, the leaf spring 38 a of one brush 32 a is fed to the back side of the first lead plate 43 via the circuit breaker 66 and the lead plate 67 by the lead plate 102 replaced with the lead plate 65. The leaf spring 38 b of the other brush 32 b is connected to the terminal 43 d and is connected to the back-side power supply terminal 44 d of the second lead plate 44 by the lead plate 103.

  As described above, in the brush holder 31, the holder main body side terminals of the first and second lead plates 43 and 44 are provided on both sides of one side and the other side in the axial direction with respect to the base wall 34 c of the holder main body 34. Since the choke coils 61 and 62 are mounted on the element mounting portions 63 and 64 passing through the base wall 34c in the axial direction, the wiring from the brushes 32a and 32b is used as a base depending on the presence or absence of the choke coils 61 and 62. It can be selectively connected to the lead plates 43 and 44 on either the one side or the other side in the axial direction of the wall 34c. Thereby, in each specification of the presence or absence of the choke coils 61 and 62, the wiring path | route of the electric power feeding circuits 33 and 101 provided in this brush holder 31 can be simplified.

  In the brush holder 31, a pair of element mounting portions 63 and 64 are provided on the holder body 34, and the choke coils 61 and 62 are mounted on the element mounting portions 63 and 64, respectively. Choke coils 61 and 62 can be provided between 43 and 44 and the brushes 32a and 32b, respectively.

  It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, in the present embodiment, the present invention is applied to the power window motor 11 in which the speed reducer 13 is attached to the motor main body 12. However, the present invention is not limited to this, for example, an electric motor without the speed reducer 13. The present invention may be applied to other electric motors. Further, not only the power window motor 11 used as a drive source of the power window device, but also, for example, a drive source of an automatic opening / closing device for a vehicle that automatically drives an opening / closing body such as a slide door, a back door, and a sun roof provided on the vehicle body. For example, the present invention may be applied to a thin electric motor mounted in a body panel.

  Further, in the present embodiment, the holding portion 56 is provided in the second mold 53, but the present invention is not limited to this, and may be provided in the first mold 52.

  In the present embodiment, the choke coils 61 and 62 are used as the noise prevention element. However, the present invention is not limited to this, and any element for reducing noise riding on the power feeding circuit may be used. A varistor, a capacitor, or the like may be used.

  Furthermore, in the present embodiment, the first connection line 61b of the choke coil 61 is connected to the back-side power supply terminal 43d of the first lead plate 43, and the second connection line 61c of the choke coil 61 is connected to the second lead. Although it connects to the front side power supply terminal 44c of the board 44, it is not restricted to this, According to the structure of the power supply circuit 33, the front side power supply terminals 43c and 44c of the corresponding lead plates 43 and 44, and the back side power supply terminal 43d, 44d can be connected.

(A), (b) is the front view and side view which show the power window motor provided with the brush holder which is one embodiment of this invention. It is a cross-sectional view of the power window motor shown in FIG. (A), (b) is a perspective view which shows the detail of the electric power feeder shown in FIG. 2, respectively. (A) is a top view of the electric power feeder shown in FIG. 2, (b) is a rear view of the electric power feeder shown in FIG. (A) is sectional drawing which shows the internal structure of a connector part, (b) is sectional drawing which follows the AA line shown to the figure (a). It is a perspective view which shows the whole structure of a feed circuit. It is a perspective view which shows the detail of the 1st and 2nd lead board shown in FIG. It is sectional drawing which shows the shaping | molding apparatus of a brush holder. It is a side view which shows the arrangement | positioning state of each lead board inside a brush holder. It is sectional drawing which shows the detail of the holding | maintenance part provided in a 2nd shaping | molding die. It is sectional drawing which shows the detail of the exposure hole formed in a connection part by the holding | maintenance part shown in FIG. It is a perspective view which shows the detail of a choke coil. It is sectional drawing which shows the detail of one element mounting part. It is sectional drawing which shows the detail of a 1st guide part. It is sectional drawing which shows the positional relationship of the other element mounting part and the 2nd-4th guide part. (A) is explanatory drawing which shows the positional relationship of the connection part of the lead plate arrange | positioned at the bottom part side edge part of one element mounting part, and the drawer | drawing-out part provided in the insertion side edge part of this element mounting part, (b) is explanatory drawing which shows the relationship between the drawing position of the 1st connection line of a choke coil, and a 2nd connection line. It is a perspective view which shows the detail of a lead plate and the connecting terminal part provided in this lead plate. FIG. 18 is a front view showing an insertion hole through which the lead plate shown in FIG. 17 is inserted. (A), (b) is sectional drawing which shows the insertion procedure of the lead board to an insertion hole, respectively. It is a perspective view which shows the modification of the electric power feeding circuit shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Power window motor 12 Motor main body 13 Reduction gear 14 Control apparatus 15 Motor yoke 16 Magnet 17 Amateur 18 Amateur shaft 19 Amateur core 19a Slit 21 Bearing 22 Amateur coil 23 Commutator 23a Segment 24 Feeder 25 Gear case 25a Engagement protrusion 25b Mounting leg 26a, 26b Bearing 27 Worm 28 Worm wheel 29 Output shaft 31 Brush holder 32a, 32b Brush 33 Feeding circuit 34 Holder body 34a Ring portion 34b Side wall 34c Base wall 35 Connection portion 36 Connector portion 36a Outer peripheral wall 36b Connection recess 36c Connection piece 36d 36e engaging recess 37 through hole 38a, 38b leaf spring 41 screw member 42 external connector 43 first lead plate 43a body 43b connector side terminal 4 3c Front side power supply terminal 43d Back side power supply terminal 44 Second lead plate 44a Main body 44b Connector side terminal 44c Front side power supply terminal 44d Back side power supply terminal 51 Molding device 52 First molding die 53 Second molding die 54 Slide mold 55 Molding chamber 56 Holding portion 56a First projecting piece 56b Second projecting piece 57 Injection hole 58 Exposed hole 59 Clearance 61, 62 Choke coil 61a, 62a Coil body 61b, 62b First connection line 61c, 62c Second connection line 61d, 62d Iron core material 63, 64 Element mounting portion 63a, 64a Lead-out portion 65 Lead plate 65a Main body portion 65b Insertion portion 66 Circuit breaker 67 Lead plate 68 Lead plate 68a Connection portion 68b Slit 69 Lead plate 69a Connection portion 71 First guide portion 71a, 71b Guide wall 71c Groove 71d Corner 72 Second gas 72a, 72b Guide wall 72c Groove 73, 74 Column 75 75 Third guide 75a Guide wall 75b Groove 75c Corner 76 Fourth guide 76a Guide wall 76b Groove 81 Screw hole 82 Bottom wall 91 Insertion hole 91a, 91b Wide inner surface 92 Connection terminal portion 93 Projection 94 Slit 95 Tapered surface 101 Feed circuit 102, 103 Lead plate L Thickness dimension A to D Straight line α, β Angle a1, a2 Draw position L Clearance t Plate thickness

Claims (4)

An electric motor comprising: a holder body that holds a pair of brushes that are disposed inside a motor housing and that is in sliding contact with a commutator; and a power feeding connector portion that is disposed outside the motor housing and is detachably connected to an external connector. A brush holder,
A base wall provided in the holder body perpendicular to the axial direction of the commutator, and having a through hole through which the commutator is inserted;
A connector-side terminal disposed in the connector portion; a one-side terminal disposed on one side in the axial direction of the commutator with respect to the base wall of the holder body; and another terminal disposed on the other side. A first lead member;
A connector-side terminal disposed in the connector portion; a one-side terminal disposed on one side in the axial direction of the commutator with respect to the base wall of the holder body; and another terminal disposed on the other side. A second lead member;
The base wall penetrates in the axial direction of the commutator and is mounted on an element mounting portion provided in the holder main body, and one of the one brush and one terminal or the other terminal of the first or second lead member. A brush holder for an electric motor, comprising: a noise preventing element connected therebetween.   2. The brush holder for an electric motor according to claim 1, wherein a pair of the element mounting portions are provided in the holder body.   3. The brush holder for an electric motor according to claim 1, wherein the noise preventing element is a choke coil, and the choke coil is mounted on the element mounting portion in parallel with the axial direction of the commutator. Motor brush holder. A brush holder comprising a holder main body for holding a pair of brushes disposed inside the pair of motor housings and in sliding contact with the commutator, and a power feeding connector portion disposed outside the motor housing and detachably connected to an external connector. An electric motor comprising:
The brush holder is provided in the holder main body perpendicular to the axial direction of the commutator, and a base wall having a through-hole through which the commutator is inserted;
A connector-side terminal disposed in the connector portion; a one-side terminal disposed on one side in the axial direction of the commutator with respect to the base wall of the holder body; and another terminal disposed on the other side. A first lead member;
A connector-side terminal disposed in the connector portion; a one-side terminal disposed on one side in the axial direction of the commutator with respect to the base wall of the holder body; and another terminal disposed on the other side. A second lead member;
The base wall penetrates in the axial direction of the commutator and is mounted on an element mounting portion provided in the holder main body, and one of the one brush and one terminal or the other terminal of the first or second lead member. It consists of noise prevention elements connected between
The electric motor characterized in that the brush holder is clamped and fixed between the pair of motor housings.

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