JP2005348538A - Motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor which reduces the axial deviation of a motor axis of the motor and can reduce vibration and a noise as well. <P>SOLUTION: The motor includes a yoke housing which rotationally houses an armature having a rotational shaft 9 and a commutator, and a brush holder 7 which holds a brush 8 slidably contacted with the commutator and arranges a capacitor 15 connected to the yoke housing in a state that a connecting terminal 15a is interposed between the brush holder 7 and the yoke housing. A projection 7f is formed at a position opposed to the connecting terminal 15a with the rotational shaft 9 as a center on the outer peripheral surface of the brush holder 7. Moreover, a groove 7g which houses the connecting terminal 15a is formed on the outer peripheral surface of the brush holder 7. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a motor.

  2. Description of the Related Art Conventionally, a motor used for a power window device, a sunroof device, or the like includes a motor body and a speed reduction unit, and a brush that is slidably contacted with a yoke housing that houses the motor, a gear housing that houses the speed reduction mechanism, and the motor (commutator) And a brush holder for holding are integrally assembled.

In this type of motor, in order to suppress electromagnetic noise generated between the brush and the commutator, for example, a brush holder is provided with a capacitor (see, for example, Patent Document 1). One connection portion of the capacitor is connected to the brush, and the other connection portion is grounded to a yoke housing made of metal via a ground terminal (yoke connection terminal).
JP 2001-186712 A

  By the way, in the motor described above, since the ground terminal connected to the capacitor is sandwiched between the brush holder and the yoke housing, the brush holder may be displaced with respect to the yoke housing. If the position of the brush holder with respect to the yoke housing is shifted, the rotating shaft of the motor supported by the bearing held by the yoke housing and the bearing held by the gear housing will be twisted. There was a problem of generating vibration and noise.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a motor that can reduce the shaft misalignment of the motor rotation shaft and, in turn, can reduce vibration and noise.

  In order to solve the above-mentioned problem, the invention according to claim 1 is characterized in that a yoke housing that rotatably accommodates an armature having a rotating shaft and a commutator, and the yoke housing are integrally assembled, and the rotating shaft is rotated. A gear housing that houses a deceleration mechanism that decelerates, and a brush that holds the brush in sliding contact with the commutator, and an element that is connected to the yoke housing with a connection terminal sandwiched between the brush holder and the yoke housing are disposed. In the motor including the brush holder, a protrusion is provided on the outer peripheral surface of the brush holder at a position facing the connection terminal around the rotation shaft.

According to a second aspect of the present invention, in the motor according to the first aspect, a groove portion that accommodates the connection terminal is formed on the outer peripheral surface of the brush holder.
According to a third aspect of the present invention, in the motor according to the first or second aspect, the protrusion height of the protrusion is such that the distance from the center of the rotation shaft to the outer peripheral surface of the protrusion is equal to the rotation shaft. The distance is set to be substantially the same as the distance from the center to the outer peripheral surface of the connection terminal.

  According to a fourth aspect of the present invention, in the motor according to any one of the first to third aspects, the groove portion is formed in a substantially semicircular shape, and a radius thereof is larger than a radius of the connection terminal. It is set to a value.

  According to a fifth aspect of the present invention, in the motor according to any one of the first to fourth aspects, the plurality of connection terminals are arranged side by side, and the width of the protruding portion is the plurality of connection terminals. Is set to be substantially the same as the width of the region in which is disposed.

(Function)
According to the first aspect of the present invention, since the protrusion is provided on the outer peripheral surface of the brush holder at a position facing the connection terminal around the rotation axis, the element protruding from the outer peripheral surface of the brush holder is provided. With the connection terminal and the protrusion, the axis of the yoke housing and the axis of the brush holder can be easily aligned. Therefore, the positional accuracy between the yoke housing and the brush holder can be improved, the armature shaft misalignment can be reduced, and vibration and noise during armature rotation can be reduced.

  According to the second aspect of the present invention, since the groove portion for accommodating the connection terminal is formed on the outer peripheral surface of the brush holder, the connection terminal is accommodated in the groove portion and positioned reliably. For this reason, the positional accuracy between the brush holder and the yoke housing is further improved.

  According to the third aspect of the present invention, the protruding height of the protruding portion is such that the distance from the center of the rotating shaft to the outer peripheral surface of the protruding portion is substantially equal to the distance from the center of the rotating shaft to the outer peripheral surface of the connection terminal. It is set to be the same value. For this reason, the axial center of the yoke housing and the axial center of the brush holder are matched with high accuracy, and the positional accuracy between the yoke housing and the brush holder is further improved.

  According to the invention of claim 4, the groove is formed in a substantially semicircular shape, and the radius thereof is set to a value larger than the radius of the connection terminal, so that the connection terminal is accommodated in the groove. It surely contacts the bottom of the groove. For this reason, if the radius of a connection terminal is managed, the protrusion amount from the brush holder outer peripheral surface of a connection terminal can be managed easily.

  According to the fifth aspect of the present invention, a plurality of connection terminals are arranged side by side, and the width of the protrusion is set to be substantially the same as the width of the region where the plurality of connection terminals are provided. That is, since one projection is provided for a plurality of connection terminals, the configuration is simpler than when a projection is provided for each connection terminal.

  ADVANTAGE OF THE INVENTION According to this invention, the motor which can reduce the axial shift of a motor rotating shaft and can reduce a vibration and noise can be provided.

(First embodiment)
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a motor 1 of this embodiment. The motor 1 is a motor used as a drive source for a power window device mounted on a vehicle. The motor 1 includes a motor main body 2 and a speed reduction unit 3.

The motor body 2 includes a yoke housing 4, a pair of magnets 5, an armature (armature) 6, a brush holder 7, and a pair of brushes 8.
The yoke housing 4 has a bottomed flat cylindrical shape, and a pair of magnets 5 are fixed to the inner surface thereof. An armature 6 is rotatably housed inside the magnet 5. The armature 6 has a rotating shaft 9, and a base end portion of the rotating shaft 9 is rotatably supported by a bearing 10 assembled at the bottom center of the yoke housing 4.

  A pair of flange portions 4 b extending outward in the radial direction is formed in the opening 4 a of the yoke housing 4. The flange portion 4b is provided to fix the yoke housing 4 to the gear housing 21 described later with screws 11. Further, a brush holder 7 as shown in FIGS. 2 and 3 is sandwiched between the opening 4 a (flange 4 b) of the yoke housing 4 and the opening 21 a of the gear housing 21. 2A is a plan view of the brush holder 7 as viewed from the motor body 2 side, and FIG. 2B is an enlarged partial cross-sectional view of a portion surrounded by a one-dot chain line in FIG. 3 is a side view of the brush holder 7.

  As shown in FIG. 1, the brush holder 7 is made of synthetic resin and has a flat cross-sectionally shaped brush holder main body (hereinafter referred to as a holder main body) 7 a that is inserted into the opening 4 a of the yoke housing 4. , An extending portion 7b extending radially outward from the holder main body portion 7a, and a connector portion 7c that is exposed to the outside of the motor 1 from the extending portion 7b and is electrically connected to the outside. A bearing 12 that rotatably supports a predetermined portion of the rotating shaft 9 is assembled at the center of the holder body 7a.

  In addition, a pair of brush holders arranged opposite to each other across the central axis L1 of the motor body 2 (rotating shaft 9) along the longitudinal direction of the holder body 7a on the motor body 2 side of the holder body 7a. A portion 7d is formed. Each brush holding portion 7d holds a brush 8, and each brush 8 is in sliding contact with a commutator 13 that rotates integrally with the rotary shaft 9 to supply power to the commutator 13.

  And as shown to Fig.2 (a), the wall part 7e is erected in the axial direction at the outer periphery of the holder main-body part 7a. Further, a projection 7f protruding outward in the radial direction is provided at a predetermined position on the outer peripheral surface of the wall 7e, and at a position facing the projection 7f across the central axis L1 of the rotation shaft 9. As shown in FIG. 3, a groove portion 7g extending in the axial direction is formed.

  As shown in FIG. 2A, a cylindrical choke coil 14 for removing power source noise is provided on one side of each brush holding portion 7d in the holder main body portion 7a. A pigtail 8 a extending from each brush 8 is connected to a connection terminal 14 a on one end side of each choke coil 14. Further, the connection terminal on the other end side of each choke coil 14 is inserted into the back surface side in a state where the choke coil 14 is installed on the brush holder 7.

  In addition, two rectangular parallelepiped capacitors 15 for removing power source noise are arranged side by side on the brush holding portion 7d side (motor body 2 side) of the holder body portion 7a. The connection terminal 15a on one end side of each capacitor 15 is disposed up to the wall portion 7e provided on the holder main body portion 7a, and is bent toward the axial direction on the outer peripheral surface of the wall portion 7e. And as shown in FIG. 3, it accommodates in the said groove part 7g formed in the outer peripheral surface of the holder main-body part 7a, and is arrange | positioned so that it may extend in an axial direction. Here, the capacitor 15 corresponds to an element connected (grounded) to the yoke housing in a state where the connection terminal 15 a is sandwiched between the brush holder 7 and the yoke housing 4. The connection terminal on the other end side of each capacitor 15 is inserted on the back side in a state where the capacitor 15 is installed on the brush holder 7.

  As shown in FIGS. 2 (a) and 2 (b), the connection terminal 15a protrudes radially outward from the outer peripheral surface of the wall portion 7e while being accommodated in the groove portion 7g. It is installed in the opening 21 a and is sandwiched between the brush holder 7 and the yoke housing 4 and comes into contact with the yoke housing 4. Since the connection terminal 15a and the protruding portion 7f are located opposite each other with the central axis L1 interposed therebetween, displacement of the brush holder 7 provided with the capacitor 15 (connection terminal 15a) with respect to the yoke housing 4 is prevented.

  Further, the protrusion amount of the protrusion 7f from the outer peripheral surface of the brush holder 7 is such that the distance R2 from the central axis L1 to the outer peripheral surface of the protrusion 7f is substantially equal to the distance R1 from the central axis L1 to the outer peripheral surface of the connection terminal 15a. It is set to be the same value. For this reason, when the brush holder 7 provided with the capacitor 15 (connection terminal 15a) is installed in the motor 1, the central axis L1 of the brush holder 7 and the central axis L1 of the yoke housing 4 coincide with each other with high accuracy. For this reason, in a state where the brush holder 7, the yoke housing 4, and the gear housing 21 are assembled, it is possible to prevent the rotating shaft 9 from being misaligned at the position of the brush holder 7 and causing twisting.

  Further, since the radius r12 of the groove portion 7g is set to a value larger than the radius r11 of the connection terminal 15a, the connection terminal 15a reliably contacts the bottom surface of the groove portion 7g when accommodated in the groove portion 7g. Therefore, in the brush holder 7, the distance R1 from the center axis L1 to the outer peripheral surface of the connection terminal 15a is easily set based on the distance r13 from the center axis L1 to the bottom surface of the groove 7g and the radius r11 of the connection terminal 15a. Will be able to. That is, since the distance R1 is (r13 + 2 × r11), if the radius r11 of the connection terminal 15a is managed, the capacitor-side distance R1 can be easily managed.

  Further, as shown in FIG. 2A, a rectangular parallelepiped breaker 16 for overcurrent protection is disposed on the brush holding portion 7d side of the holder main body portion 7a. The breaker 16 is located on the outer peripheral portion on the opposite side of the capacitor 15 across the central axis L1 of the rotary shaft 9. Connection portions of second and third terminals 18 and 19 to be described later are exposed at positions where the breaker 16 is disposed, and the connection portions 16a and 16b of the breaker 16 are respectively connected to connection portions of the corresponding terminals 18 and 19, respectively. Connected.

  Further, first and second terminals 17 and 18 made of a metal plate are embedded in the holder main body portion 7a, the extension portion 7b, and the connector portion 7c of the brush holder 7 by insert molding. The terminals 17 and 18 extend from the connector portion 7c to a predetermined position of the holder main body portion 7a via the extension portion 7b, are arranged side by side at the connector portion 7c and the extension portion 7b, and are divided into both sides at the holder main body portion 7a. Be placed. A third terminal 19 made of a metal plate is embedded in the holder main body 7a by insert molding.

  One end of the first terminal 17 is exposed as a terminal pin 17a at the connector portion 7c, and the other end is exposed on the back side of the holder main body portion 7a. One end of the second terminal 18 is exposed as a terminal pin 18 a at the connector portion 7 c similarly to the first terminal 17, and is exposed at the lower portion of the breaker 16. One end of the third terminal 19 is exposed on the back side of the holder body 7 a and the other end is exposed on the back side of the holder body 7 a and the lower part of the breaker 16.

  The electrical connection between the terminals 17 to 19 and the breaker 16, choke coil 14, and capacitor 15 will be described. In the breaker 16, the connection portions 16 a and 16 b are connected to the connection portions of the second and third terminals 18 and 19. Connected by electrical welding. Each choke coil 14 is connected to the connection portion of the first and third terminals 17 and 19 on the back side of the holder main body portion 7a. In addition, each capacitor 15 has a connection terminal on the other end connected to a connection portion of the first and third terminals 17 and 19 on the back surface side of the holder main body portion 7a. That is, each capacitor 15 is connected to the brush 8 via the first and third terminals 17 and 19 and the choke coil 14.

The speed reducer 3 shown in FIG. 1 includes a gear housing 21, a worm shaft 22, and a worm wheel 23.
The gear housing 21 is made of synthetic resin and is formed in a predetermined shape so as to accommodate the worm shaft 22 and the worm wheel 23 therein. The gear housing 21 has an opening 21 a that faces the opening 4 a (flange 7 b) of the yoke housing 4. The gear housing 21 and the yoke housing 4 are fixed by the screw 11 with the brush holder 7 being sandwiched between the yoke housing 4 and the gear housing 21.

  The worm shaft 22 is connected to the rotating shaft 9 of the motor 1 and is rotatably supported by bearings 24 and 25 provided at predetermined positions in the gear housing 21. The worm shaft 22 is engaged with a worm wheel 23, and the worm wheel 23 is drivingly connected to an output shaft 26 disposed so as to be orthogonal to the worm shaft 22. The output shaft 26 is drivingly connected to a known X-arm regulator (not shown) that opens and closes a window glass (not shown). Then, when the output shaft 26 rotates, the regulator operates to open and close the window glass.

As described above, this embodiment has the following effects.
(1) On the outer peripheral surface of the brush holder 7, a protrusion 7 f is provided at a position facing the connection terminal 15 a of the capacitor 15 around the rotation shaft 9 (center axis L <b> 1). For this reason, the axial center of the yoke housing 4 and the axial center of the brush holder 7 can be easily aligned by the connection terminal 15a of the capacitor 15 and the projection 7f that are opposed to each other with the rotating shaft 9 as the center. Therefore, the positional accuracy between the yoke housing 4 and the brush holder 7 can be improved, the axial deviation of the armature 6 (rotating shaft 9) can be reduced, and the vibration and noise during the rotation of the armature 6 can be reduced.

  (2) Since the groove part 7g which accommodates the connection terminal 15a of the capacitor | condenser 15 is formed in the outer peripheral surface of the brush holder 7, the connection terminal 15a is accommodated in the groove part 7g, and is positioned reliably. For this reason, the positional accuracy between the brush holder 7 and the yoke housing 4 is further improved.

  (3) The protrusion height of the protrusion 7f is such that the distance R2 from the central axis L1 of the rotation shaft 9 to the outer peripheral surface of the protrusion 7f is the distance from the central axis L1 of the rotation shaft 9 to the outer peripheral surface of the connection terminal 15a. It is set to be substantially the same value as R1. For this reason, when the brush holder 7 is assembled to the yoke housing 4, the position of the central axis L1 of the yoke housing 4 and the position of the central axis L1 of the brush holder 7 are matched with each other with high accuracy. The positional accuracy with respect to the brush holder 7 is further improved.

  (4) Since the groove portion 7g formed on the outer peripheral surface of the brush holder 7 is formed in a substantially semicircular shape in which the radius r12 is larger than the radius r11 of the connection terminal 15a, the connection terminal 15a is securely connected to the groove portion 7g. It is in contact with the bottom surface. For this reason, if the radius r11 of the connection terminal 15a is managed, the protrusion amount of the connection terminal 15a from the outer peripheral surface of the brush holder 7 can be easily managed.

(Second Embodiment)
Hereinafter, a second embodiment of the present invention will be described with reference to the drawings.
In addition, in this embodiment, since the structure of a brush holder main-body part differs from the said 1st Embodiment, description and drawing are abbreviate | omitted about the same structural member as 1st Embodiment.

  The brush holder 30 is made of synthetic resin, and as shown in FIG. 4A, a brush holder main body portion (hereinafter referred to as a holder main body portion) 30 a having a flat circular cross section is formed in the opening 4 a of the yoke housing 4. Inserted. 4A is a plan view of the holder main body 30a as viewed from the motor main body 2 side, and FIG. 4B is an enlarged partial cross-sectional view of a portion surrounded by a one-dot chain line in FIG. 2A.

  As shown in FIG. 4 (a), the holder body 30a is disposed on the side of the motor body 2 with the central axis L1 of the motor body 2 (rotating shaft 9) in between along the longitudinal direction of the holder body 30a. A pair of brush holding portions 30b arranged to face each other is formed. Each brush holding portion 30b holds a brush 31, and each brush 31 is in sliding contact with a commutator 13 that rotates integrally with the rotary shaft 9 to supply power to the commutator 13.

  And the protrusion part 30c which protrudes toward a radial direction outer side is provided in the predetermined position of the outer peripheral surface of the holder main-body part 30a. As shown in FIG. 4B, a groove 30d extending in the axial direction is formed at a position facing the protrusion 30c across the central axis L1 of the rotation shaft 9.

  As shown in FIG. 4A, the holder main body 30a is provided with two resistors 32 and two capacitors 33 as elements. The two resistors 32 and the two capacitors 33 constitute a generally known noise prevention circuit that prevents the generation of electromagnetic noise between the brush 31 and the commutator 13.

  Each brush 31 is connected to a power supply terminal for receiving power supply via a resistor 32, and between each resistor 32 and the power supply terminal is grounded to the yoke housing 4 via a capacitor 33. And the capacitor | condenser 33 suppresses the big voltage change at the time of the brush 31 slidably contacting with the commutator 13, and it prevents the power supply noise between this brush 31 and the commutator 13.

  Each capacitor 33 as an element is connected to the yoke housing 4 in a state where the connection terminal 33 a is sandwiched between the brush holder 30 and the yoke housing 4. The other connection terminal of the capacitor 33 is connected between the resistor 32 and the power supply terminal.

  More specifically, the connection terminals 33a of the two capacitors 33 are arranged side by side up to the outer peripheral edge of the holder main body 30a, and are bent in the axial direction as they are. And it accommodates in the said groove part 30d formed in the outer peripheral surface of the holder main-body part 30a, and arranges two side by side so that it may extend in an axial direction. The two connection terminals 33a protrude radially outward from the outer peripheral surface of the holder body 30a while being accommodated in the groove 30d, and are installed in the opening 4a of the yoke housing 4 in this state. It is sandwiched between the brush holder 30 and the yoke housing 4 and connected (grounded) to the yoke housing 4.

  At this time, since the protrusion of the connection terminal 33a and the protrusion 30c are in a position facing each other across the central axis L1, the positional deviation of the brush holder 7 provided with the capacitor 33 (connection terminal 33a) with respect to the yoke housing 4 is displaced. Is prevented.

  As in the first embodiment, the protrusion amount of the protrusion 30c from the outer peripheral surface of the brush holder 30 is such that the distance from the central axis L1 to the outer peripheral surface of the protrusion 30c is the center axis L1 to the connection terminal 33a. The distance is set to be approximately the same as the distance to the outer peripheral surface. For this reason, when the brush holder 30 provided with the capacitor 33 (connection terminal 33a) is installed in the motor 1, the center axis L1 of the brush holder 30 and the center axis L1 of the yoke housing 4 coincide with each other with high accuracy. For this reason, in a state where the brush holder 30, the yoke housing 4 and the gear housing 21 are assembled, it is possible to prevent the rotating shaft 9 from being misaligned at the position of the brush holder 30 and causing twisting.

  The width W2 of the protrusion 30c is set to be approximately the same as the width W1 of the region where the two connection terminals 33a are provided. Since the yoke housing 4 is made of metal and has a relatively high rigidity, if the protrusion 30c is provided at one place with the width W2, the same as that of providing two protrusions corresponding to each connection terminal 33a. An effect is obtained. That is, the brush holder 30 is accurately positioned with respect to the yoke housing 4 by the connection terminal 33 a and the protrusion 30 c of the capacitor 33 provided in the brush holder 30.

As described above, this embodiment has the following effects.
(1) Two connection terminals 33a are arranged side by side, and the width W2 of the protrusion 30c is set to be approximately the same as the width W1 of the region where the connection terminals 33a are provided. That is, since one projection 30c is provided for the two connection terminals 33a, the configuration is simpler than when the projection 30c is provided for each connection terminal 33a.

In addition, you may change each said embodiment of this invention as follows.
In the first embodiment, the connection terminals 15a of the two capacitors 15 are disposed so as to extend toward opposite sides, but the connection terminals 15a may be provided in any way. For example, as shown in FIG. 5, two connection terminals 15a may be provided side by side. In this case, as shown in FIG. 6, two groove portions 41 are formed along the axial direction corresponding to the positions where the connection terminals 15 a are disposed, and each connection terminal 15 a is accommodated in the groove portion 41. It is provided so as to protrude from the outer peripheral surface of the holder body 7a. And the protrusion part 42 is provided in the position facing the groove part 41 on both sides of the central axis L1 of the rotating shaft 9. As shown in FIG. The width W4 of the protrusion 42 is set to be approximately the same as the width W3 of the region where the two connection terminals 15a are provided. With this configuration, the same effects as those of the first embodiment can be obtained, and the number of protrusions provided on the brush holder can be reduced to achieve a simple configuration.

  In each of the above embodiments, the groove portions 7g and 30d for accommodating the connection terminals 15a and 33a of the capacitors 15 and 33 are formed on the outer peripheral surfaces of the brush holders 7 and 30, but the groove portions are not necessarily formed. In that case, the connection terminals 15a and 33a may be disposed at predetermined positions on the outer peripheral surfaces of the brush holders 7 and 30 (positions facing the protrusions 7f and 30c across the central axis L1).

In each of the above embodiments, the connection terminals 15a and 33a are wires, but other shapes such as a plate shape may be used.
In each of the above embodiments, the shape of the groove portions 7g and 30d is a semicircular shape, but the shape of the groove portions is not limited to this. As long as the connection terminals 15a and 33a of the capacitors 15 and 33 grounded to the yoke housing 4 protrude by a predetermined amount while being accommodated in the groove, the groove may have any shape. Further, it is not necessary to form the groove portion so that the capacitors 15 and 33 are necessarily in contact with the bottom surface of the groove portion. For example, a groove portion having a substantially triangular cross section may be used.

  In each of the above embodiments, the capacitors 15 and 33 in the motor are grounded. However, a choke coil or a resistor as an element may be grounded.

Sectional drawing of the motor in 1st Embodiment. (A) of the brush holder in 1st Embodiment is the top view seen from the motor main body side, (b) is the fragmentary sectional enlarged view of (a). The side view of the brush holder in 1st Embodiment. (A) of the brush holder in 2nd Embodiment is the fragmentary top view seen from the motor main body side, (b) is the fragmentary sectional enlarged view of (a). Explanatory drawing of the brush holder of another example. Explanatory drawing of the brush holder of another example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Motor, 2 ... Motor main-body part, 3 ... Reduction mechanism, 4 ... Yoke housing, 6 ... Armature (armature), 7, 30 ... Brush holder, 7f, 30c, 42 ... Projection part, 7g, 30d, 41 ... Groove, 8, 31 ... brush, 13 ... commutator, 15, 33 ... capacitor as element, 15a, 33a ... connection terminal, 9 ... rotating shaft, 13 ... commutator, 21 ... gear housing, R1, R2 ... distance, r11 ... radius of the connection terminal, r12 ... radius of the groove, W1, W2, W3, W4 ... width.

Claims (5)

A yoke housing that rotatably accommodates an armature having a rotating shaft and a commutator, a gear housing that is integrally assembled to the yoke housing and that accommodates a reduction mechanism that decelerates the rotation of the rotating shaft, and a slide on the commutator. A brush holder that holds a brush in contact with the brush holder in which an element to be connected to the yoke housing is disposed in a state where a connection terminal is sandwiched between the brush holder and the yoke housing.
The motor according to claim 1, wherein a protrusion is provided on the outer peripheral surface of the brush holder at a position facing the connection terminal around the rotation axis. The motor according to claim 1,
The motor according to claim 1, wherein a groove for accommodating the connection terminal is formed on an outer peripheral surface of the brush holder. The motor according to claim 1 or 2,
The protrusion height of the protrusion is set so that the distance from the center of the rotation shaft to the outer peripheral surface of the protrusion is substantially the same as the distance from the center of the rotation shaft to the outer peripheral surface of the connection terminal. A motor characterized by being made. The motor according to any one of claims 1 to 3,
The said groove part is formed in the substantially semicircle shape, The radius is set to the larger value than the radius of the said connection terminal, The motor characterized by the above-mentioned. The motor according to any one of claims 1 to 4,
The motor is characterized in that a plurality of the connection terminals are arranged side by side, and the width of the protrusion is set to be substantially the same as the width of the region in which the plurality of connection terminals are arranged.

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