WO2020067206A1 - Motor device - Google Patents

Abstract

One embodiment of the present invention is a motor device provided with: a cylindrical member; and a stator provided with a stator core having an inner hole, an insulating member attached to the stator core, and a coil comprising a conducting wire wound on the stator core with the insulating member interposed therebetween. The stator core is attached to the cylindrical member such that an inner circumferential surface of the stator core is in contact with an outer circumferential surface of the cylindrical member. The insulating member has a cylindrical section that extends from the stator core along the outer circumferential surface of the cylindrical member. A projection that is in contact with the outer circumferential surface of the cylindrical member is formed at an end section on an inner circumferential surface of the cylindrical section. A recess is provided at a position on the outer circumferential surface of the cylindrical member, said position facing the projection.

Description

Motor device

The present invention relates to a motor device.

Conventionally, in a motor device including a stator having a stator core and a coil formed of a conductive wire wound around the stator core via an insulating member, it is known to press-fit the stator core into a cylindrical member. For example, in a motor device described in Japanese Patent Application Laid-Open No. 2013-252054, it is described that a stator is press-fitted into a bearing holder by inserting the stator into a stator press-fitting portion of a bearing holder as a cylindrical member.

By the way, when the stator is press-fitted into the cylindrical member, chips (cut chips) may be generated due to strong rubbing between the inner peripheral surface of the stator and the outer peripheral surface of the cylindrical member. Therefore, it is necessary to prevent the chips generated at the time of press-fitting from affecting the reliability of the motor device.

Accordingly, an object of the present invention is to improve the sealing performance of chips generated by press-fitting a stator into a cylindrical member.

An exemplary first invention of the present application is a coil comprising a cylindrical member, a stator core having an inner hole, an insulating member attached to the stator core, and a conductor wound around the stator core via the insulating member. Wherein the stator core is attached to the cylindrical member so that an inner peripheral surface of the stator core is in contact with an outer peripheral surface of the cylindrical member, and the insulating member is a cylindrical member. A cylindrical portion extending from the stator core along an outer peripheral surface of the cylindrical member, and a protrusion that contacts an outer peripheral surface of the cylindrical member is formed at an end of an inner peripheral surface of the cylindrical portion. A motor device, wherein a recess is provided on a surface at a position facing the protrusion.

According to the present invention, the sealing performance of chips generated by press-fitting the stator into the cylindrical member can be improved.

It is a perspective view from one side of the motor device of an embodiment. It is a perspective view from the other side of the motor device of an embodiment. It is a sectional view of the motor device of an embodiment. It is an exploded perspective view about the main parts of the motor device of an embodiment. FIG. 3 is an exploded perspective view of the motor device according to the embodiment, excluding coils of a stator. FIG. 4 is an enlarged front view of one insulator included in the stator. It is an enlarged front view of the other insulator included in the stator. It is an enlarged front view of the stator of the motor device of an embodiment. FIG. 4 is a diagram illustrating a structure in an assembled state after a stator is press-fitted into a sleeve when the motor device according to the embodiment is assembled, as viewed from the circuit board side in the axial direction. FIG. 10 is an enlarged sectional view of the structure in an assembled state of FIG. 9. FIG. 4 is a partial cross-sectional view of the motor device of the embodiment at the time of starting press-fitting in a step of press-fitting the stator into the sleeve. FIG. 9 is a partial cross-sectional view of the motor device according to the embodiment during press-fitting in a step of press-fitting the stator into the sleeve. It is AA sectional drawing of FIG. FIG. 9 is a partial cross-sectional view of the motor device according to the embodiment at the time when press-fitting is completed in a step of press-fitting the stator into the sleeve. It is a horizontal sectional view of the vehicle headlight to which the motor device of an embodiment is applied.

The present invention relates to a patent application No. 2018-184374 filed with the Japan Patent Office on September 28, 2018, the entire contents of which is incorporated herein by reference.

Hereinafter, embodiments of the motor device according to the present invention will be described.

(1) Schematic Configuration of Motor Device 1 of Embodiment A schematic configuration of the motor device 1 of the embodiment will be described below with reference to FIGS.
FIG. 1 is a perspective view from one side of a motor device 1 of the embodiment. FIG. 2 is a perspective view from the other side of the motor device 1 of the embodiment. FIG. 3 is a cross-sectional view of the motor device 1 according to the embodiment. FIG. 4 is an exploded perspective view of main components of the motor device 1 according to the embodiment.
In the following description, “axial direction” means the axial direction of the sleeve 9 of the motor device 1. The axial direction is equal to the rotation axis of the shaft 5, which is the rotation axis of the motor (the axis CTR in FIG. 3).

As shown in FIGS. 1 to 3, an exemplary motor device 1 of the present embodiment includes a circuit board 3, a yoke 4, a shaft 5, a rotating body 6, a cover 2 covering the rotating body 6, and a stator 8. And a device for rotating the rotating body 6 by a DC brushless motor.

The cover 2 is made of, for example, resin and has a rectangular parallelepiped shape with a bottom. As shown in FIG. 4, a sleeve 9 (an example of a cylindrical member) is attached to the cover 2. The sleeve 9 is made of metal such as iron or aluminum, for example, and is disposed in a hole provided at the center of the circular bottom of the cover 2. The cover 2 and the sleeve 9 are integrated by insert molding.

The circuit board 3 is electrically connected to the coil (winding) 83 of the stator 8 via conductive pins 84 (an example of a conductive member; see FIGS. 3 and 4), and a control circuit (not shown) is mounted. . The circuit board 3 supplies a current to the coil 83.
As shown in FIG. 4, the circuit board 3 includes a first surface 3a which is a surface on the yoke 4 side, and a second surface 3b which is a surface on the back side of the first surface 3a and a surface on the cover 2 side. Have. The first surface 3a is a main mounting surface on which main circuit components are mounted.
An inner hole 3h is formed near the center of the circuit board 3, and the inner hole 3h is pressed into the outer peripheral surface of the sleeve 9, whereby the circuit board 3 and the sleeve 9 are connected.
The circuit board 3 has two through holes 32. As shown in FIGS. 2 and 3, the screw 22 is fastened to the cover 2 through the through hole 32, and regulates the circumferential displacement of the circuit board 3 with respect to the cover 2. The cover 2 is arranged to face the second surface 3b of the circuit board 3 opposite to the first surface 3a, and is configured to cover the second surface 3b of the circuit board 3.

(4) As shown in FIG. 4, the cover 2 has two openings 24, and the circuit board 3 has two through holes 34. As will be described later, in the motor device 1 of the present embodiment, the other end of the conductive pin 84 having one end fixed to the coil 83 of the stator 8 passes through the through hole 34 of the circuit board 3, and the second surface 3 b ( (Surface on the cover 2 side). The opening 24 of the cover 2 is provided to efficiently perform the work of soldering the conductive pins 84.

As shown in FIG. 3, the shaft 5 extends in the axial direction of the motor device 1. One end of the shaft 5 is fixed to the support portion 41. The support portion 41 is made of, for example, metal, and the yoke 4 and the support portion 41 are joined by caulking the support portion 41. The support portion 41 is pressed against the inner surface (leftward in FIG. 3) of the yoke 4 in the axial direction of FIG. 3 by the urging force of the coil spring 53 provided between the support portion 41 and the bearing 52.
One end of the shaft 5 is pressed into the support portion 41, and the other end of the shaft 5 is fixed to the rotating body 6. The shaft 5 penetrates through the inside of the sleeve 9, and is supported at one end and the other end in the axial direction of the sleeve 9 by bearings 51 and 52, respectively.

ヨ ー ク As shown in FIGS. 2 and 4, the yoke 4 has a substantially annular shape. The magnet 7 is pressed into the inner peripheral surface of the yoke 4 (see FIG. 3). The magnet 7 is magnetized such that N poles and S poles are alternately arranged in the circumferential direction. The yoke 4 is made of a magnetic material, and prevents a magnetic field formed by the magnet 7 from leaking outside the magnet 7.

As shown in FIG. 3, the stator 8 is disposed so as to face the first surface 3 a of the circuit board 3, the stator core 81, an insulating member 82 attached to the stator core 81, and the stator core 81 via the insulating member 82. And a coil 83 formed of a wound conductive wire.
In the present embodiment, the magnet 7 and the shaft 5 constitute a rotor. The motor according to the present embodiment is an outer rotor type DC brushless motor in which the rotor is located radially outside the stator 8.

(2) Configuration of Stator 8 of Embodiment Next, the configuration of the stator 8 will be described in more detail with reference to FIGS.
FIG. 5 is an exploded perspective view of the stator 8 excluding the coil 83. FIG. 6 is an enlarged front view of the first insulator 82A when viewed from the yoke 4 side in the axial direction. FIG. 7 is an enlarged front view of the second insulator 82B when viewed from the rotating body 6 side in the axial direction. FIG. 8 is an enlarged front view of the stator 8 (view when viewed from the yoke 4 side).

FIG. 5 shows a stator core 81, insulating members 82 (first insulator 82A, second insulator 82B), and conduction pins 84. The insulating member 82 is made of resin, and is manufactured by, for example, injection molding.
As shown in FIG. 5, the stator core 81 is a laminated body in which a plurality of magnetic steel sheets are laminated and fixed in the axial direction (the left and right direction in FIG. 3), and has a plurality of teeth 811. In the example of the present embodiment, the teeth 811 are provided at 90-degree intervals in the circumferential direction of the stator core 81.
An inner hole 81h is formed in a central portion of the stator core 81. The inner peripheral surface 81 a of the inner hole 81 h is pressed into the outer peripheral surface of the sleeve 9 when the stator 8 is connected to the sleeve 9. That is, the stator core 81 is attached to the sleeve 9 such that the inner peripheral surface 81a of the inner hole 81h of the stator core 81 contacts the outer peripheral surface of the sleeve 9.

As shown in FIG. 5, the insulating member 82 is made of an insulating material such as rubber or resin, and insulates the coil 83 from the teeth 811 and the first insulator 82A that sandwiches the stator core 81 from both sides. It consists of body 82B. The first insulator 82A and the second insulator 82B have an inner hole 82Ah and an inner hole 82Bh into which the sleeve 9 is inserted.

As shown in FIGS. 5 and 6, the first insulator 82A has a teeth cover portion 821A corresponding to the teeth 811 of the stator core 81 at intervals of 90 degrees in the circumferential direction of the inner hole 82Ah. The first insulator 82A has an inner peripheral wall 823A that extends in the axial direction at the periphery of the inner hole 82Ah. That is, the inner peripheral wall 823A extends in the axial direction on the side opposite to the side on which the stator core 81 is provided with reference to the teeth cover portion 821A. The wall portion 822A extends in the axial direction on the side where the stator core 81 is provided with reference to the tooth cover portion 821A.
As shown in FIGS. 5 and 7, the second insulator 82B has a teeth cover portion 821B corresponding to the teeth 811 of the stator core 81 at intervals of 90 degrees in the circumferential direction of the inner hole 82Bh. The second insulator 82B has a cylindrical portion 823B that extends in the axial direction at the periphery of the inner hole 82Bh. That is, the cylindrical portion 823B extends in the axial direction on the side opposite to the side on which the stator core 81 is provided with reference to the teeth cover portion 821B. A wall portion 822B extends in the axial direction on the side where the stator core 81 is provided with reference to the tooth cover portion 821B.
As described above, the first insulator 82A and the second insulator 82B extend along the periphery of the inner hole 81h of the stator core 81 and in the axial direction of the sleeve 9 into which the stator 8 is press-fitted. An inner peripheral wall 823A that separates the coil 811 from the coil 83 and a cylindrical portion 823B are provided. By providing the inner peripheral wall 823A and the cylindrical portion 823B, insulation between the coil 83 and the teeth 811 is reliably performed.

Referring to FIGS. 5 and 6 again, a cutout portion 823Ah is formed in the inner peripheral wall 823A of the first insulator 82A. As described later, the notch portion 823Ah is provided to expose the surface of the stator core 81 when the stator 8 is assembled, and to facilitate the press-fitting operation of the stator 8 into the sleeve 9. That is, the first insulator 82A has the notch 823Ah on the periphery of the inner hole 82Ah corresponding to the exposed surface of the stator core 81.
In the notch 823Ah, a projection 823Aj is provided radially outward from the inner peripheral wall 823A. The projection 823Aj is provided to ensure insulation between the coil 83 and the teeth 811 at the notch 823Ah.

Referring to FIGS. 5 and 7, the second insulator 82B has a cylindrical portion 824B that extends in the axial direction and allows the conduction pin 84 to pass therethrough. The cylindrical portion 824B is supported by a wall portion 822B formed in the axial direction, so that the strength of the cylindrical portion 824B is sufficiently ensured.
Note that the cylindrical portion 823B of the second insulator 82B is not provided with a notch.

After sandwiching the stator core 81 from both sides by the first insulator 82A and the second insulator 82B, a coil 83 is formed by winding a conductive wire around the teeth cover 821A, the teeth 811 and the teeth cover 821B. The stator 8 is assembled as shown in FIG.
After assembling the stator 8, as shown in FIG. 5, the conductive pin 84 is passed through the cylindrical portion 824 </ b> B, and one end of the conductive pin 84 and one end of the coil 83 are soldered.

(3) Press-fitting of Stator 8 to Sleeve 9 Next, press-fitting of the stator 8 to the sleeve 9 when assembling the motor device 1 of the present embodiment will be described with reference to FIGS.
FIG. 9 is a diagram of the assembled structure after press-fitting the stator 8 into the sleeve 9 when assembling the motor device 1 of the present embodiment, as viewed from the first surface 3a side of the circuit board 3 in the axial direction. It is. When assembling the motor device 1 of the present embodiment, the circuit board 3 is fixed to the cover 2 before the stator 8 is pressed into the sleeve 9. FIG. 10 is an enlarged sectional view of the structure in the assembled state of FIG.

As shown in FIG. 10, when the stator 8 is press-fitted into the sleeve 9, the inner hole 81 h of the stator core 81 of the stator 8 extends in the axial direction (the press-fitting direction D from the first surface 3 a to the second surface 3 b of the circuit board 3). This is performed so that the inner peripheral surface 81a contacts the outer peripheral surface 9a of the sleeve 9. At the time of press-fitting, the cover 2 is fixed to the equipment, and the stator 8 is pressed by a predetermined amount in the press-fitting direction by the press-fitting jig.
As described above, at the time of press-fitting of the stator 8, one end of the conductive pin 84 is in a state of being soldered to the coil 83. Therefore, the operator checks whether or not the end of the conductive pin 84 is soldered. By doing so, erroneous press-fitting of the orientation of the stator 8 is avoided.

In this embodiment, when the stator 8 is pushed in by the press-fitting jig, a part of the stator core 81 is exposed. Therefore, the jig is pressed against the exposed surface of the stator core 81 so that the stator 8 is brought into contact with the sleeve 9. Press-fitting can be performed reliably.
More specifically, as shown in FIG. 8, the stator core 81 of the stator 8 has an exposed surface that is exposed when viewed from the side where the jig is pressed in the axial direction of the sleeve 9. The inner surface 81 a of the inner hole 81 h of the stator core 81 can be securely pressed into the outer surface 9 a of the sleeve 9 by bringing the inner surface 81 a of the stator core 81 into contact with the inner surface of the sleeve 9 by pushing the inner surface 81 a of the sleeve 9.
The exposed surface of the stator core 81 shown in FIG. 8 includes a peripheral region 811a along the periphery of the inner hole 81h of the stator core 81 on the surface of the stator core 81. The peripheral region 811a of the inner hole 81h on the exposed surface is located closest to the outer peripheral surface 9a of the sleeve 9 when the stator 8 is press-fitted into the sleeve 9 on the surface of the stator core 81, so that the jig is pressed into the peripheral region 811a. , The stator 8 can be more securely press-fitted.

よ う As described with reference to FIG. 6, the notch 823Ah is formed in the inner peripheral wall 823A of the first insulator 82A. Therefore, after assembling the first insulator 82A to the stator core 81, as shown in FIG. 8, a protruding region 811p of the exposed surface where the surface of the stator core 81 is exposed through the notch 823Ah is formed. In the present embodiment, the protruding region 811p is a region that protrudes in the radial direction of the stator core 81 from the periphery of the inner hole 81h of the stator core 81.

If it is assumed that the inner peripheral wall 823A of the first insulator 82A is provided outside the state shown in FIG. 6, the peripheral area 811a of the exposed surface can be widened. However, as shown in FIG. 3, the outer shape of the entire stator 8 cannot be expanded in order to secure a gap between the magnets 7. The size in the radial direction 811 is sacrificed, which affects the performance of the motor. Therefore, a notch 823Ah is locally provided in the inner peripheral wall 823A of the first insulator 82A in the circumferential direction, thereby providing a protruding region 811p of the exposed surface of the stator core 81. Therefore, an effective exposed area can be secured without affecting the performance of the motor.

In the example of the present embodiment, four protruding regions 811p on the exposed surface are formed along the periphery of the inner hole 81h of the stator core 81. The press-fitting operation is performed by pressing the stator 8 in the press-fitting direction D using a press-fitting jig that simultaneously contacts the four projecting regions 811p of the exposed surface. Since the four projecting regions 811p are located relatively close to the outer peripheral surface 9a of the sleeve 9, the press-fitting of the stator 8 is reliably performed.

In the example of the present embodiment, the protruding regions 811p of the exposed surface of the stator core 81 are arranged at equal intervals in the circumferential direction of the inner hole 81h of the stator core 81. In this example, protruding regions 811p of the exposed surface of the stator core 81 are provided at four locations between the adjacent teeth 811 of the stator core 81 at equal intervals in the circumferential direction. That is, in FIG. 8, the configuration is such that the protruding region 811p is provided toward the portion where the coil 83 is not wound, so that the influence on the arrangement of the coil 83 in the stator 8 is small.

As described with reference to FIG. 6, the first insulator 82A is provided with the projection 823Aj at the notch 823Ah from the inner peripheral wall 823A toward the outside in the radial direction. Therefore, when the stator 8 is assembled, as shown in FIG. 8, the protrusion 823Aj of the first insulator 82A is configured to surround at least a part of the protruding region 811p on the exposed surface of the stator core 81. Therefore, insulation between the tooth 811 and the coil 83 in the protruding region 811p is reliably performed.

円 筒 Note that, unlike the inner peripheral wall 823A of the first insulator 82A, the cylindrical portion 823B of the second insulator 82B is not provided with a notch. Therefore, in a state where the stator 8 is assembled, when the stator 8 is viewed from the second insulator 82B side, a projecting region projecting radially outward from the inner hole 81h is not formed on the exposed surface of the stator core 81. That is, the protruding region is provided only on the surface of the stator core 81 on the first insulator 82A side in the axial direction of the sleeve 9, and is not provided on the surface of the stator core 81 on the second insulator 82B side in the axial direction of the sleeve 9. . Therefore, by checking the exposed surfaces of the stator core 81 on both sides of the stator 8, the operator can also prevent erroneous assembly in which the direction of the stator 8 is erroneous when press-fitting the sleeve 9.

(4) Sealing when Stator 8 is Press-Fit into Sleeve 9 When the stator 8 is press-fitted into the sleeve 9, the inner peripheral surface of the stator 8 and the outer peripheral surface of the sleeve 9 are strongly rubbed with each other, so that chips (cut chips) are generated. May occur. In that case, the generated chips may move and adhere to the circuit board 3, causing a problem such as an electrical short circuit. Therefore, in the motor device 1 of the present embodiment, a configuration is adopted in which the space between the stator 8 and the sleeve 9 is securely sealed as described below so that chips generated at the time of press-fitting do not move to the circuit board 3. Have been.

Hereinafter, sealing when the stator 8 is press-fitted into the sleeve 9 will be described with reference to FIGS. FIG. 11 is a partial cross-sectional view of the motor device 1 according to the embodiment at the time when the press-fitting is started in the process of press-fitting the stator 8 into the sleeve 9. FIG. 12 is a partial cross-sectional view of the motor device 1 according to the embodiment in the process of press-fitting the stator 8 into the sleeve 9 during press-fitting. FIG. 13 is a sectional view taken along line AA of FIG. FIG. 14 is a partial cross-sectional view of the motor device 1 according to the embodiment at the time when the press-fitting is completed in the process of press-fitting the stator 8 into the sleeve 9.
In each of FIGS. 11, 12, and 14, an enlarged view of a portion E in (a) is shown in (b).

As shown in FIG. 11, the cylindrical portion 823B of the second insulator 82B extends from the stator core 81 toward the circuit board 3 along the outer peripheral surface of the sleeve 9. A protrusion 825B is formed at an end of the inner peripheral surface 823Bs of the cylindrical portion 823B. The protrusion 825B is provided for the purpose of sealing so that chips generated while the stator 8 is pressed into the sleeve 9 do not fall onto the circuit board 3.
As described above, since the second insulator 82B is a resin member manufactured by, for example, injection molding, the end of the inner peripheral surface 823Bs corresponds to the split surface of the mold, as shown in FIG. Burr Br is generated as described above.

As shown in FIG. 11B, the outer peripheral surface 9a of the sleeve 9 has a small-diameter outer peripheral surface 9a1 formed continuously in the press-fitting direction, and an outer peripheral surface 9a2 linearly expanding in diameter from the diameter of the outer peripheral surface 9a1. , A large-diameter outer peripheral surface 9a3. The outer peripheral surface 9a3 of the sleeve 9 is provided with a recess 93d over the entire circumference.

(4-1) Start Time of Press-In As shown in FIG. 11, at the start of press-fitting in the press-fitting step when the stator 8 is press-fitted into the sleeve 9, the protrusion surface 825Bs of the protrusion 825B comes into contact with the outer peripheral surface 9a3 of the sleeve 9. Is configured. Since the press-fitting direction is the downward direction in FIG. 11, the projection surface 825Bs comes into contact with the outer peripheral surface 9a3 during the entire press-fitting process. Therefore, chips generated due to strong rubbing between the inner peripheral surface of the stator 8 and the outer peripheral surface of the sleeve 9 during the press-fitting process are generated from the gap between the inner peripheral surface 823Bs of the second insulator 82B and the outer peripheral surface 9a3. Is prevented from moving. That is, the space between the stator 8 and the sleeve 9 is sealed so that the chips do not move to the circuit board 3.

(4-2) During press-fitting FIG. 12 shows a state where the press-fitting has progressed from the state of FIG. In the state of FIG. 12, the second insulator 82B moves relatively downward with respect to the sleeve 9 as compared to the state of FIG.
As shown in FIG. 12B, in this state, the protrusion 825B is located on the outer peripheral surface 9a3, but since the burr Br is formed on the protrusion surface 825Bs, the protrusion surface 825Bs is floating from the outer peripheral surface 9a3. It has become. Therefore, as shown in FIG. 13, a gap is formed between the protruding surface 825Bs and the outer peripheral surface 9a3, and the sealing between the stator 8 and the sleeve 9 is incomplete.

(4-3) End of Press-In At the end of press-in, as shown in FIG. 12, a recess 93d of the outer peripheral surface 9a3 of the sleeve 9 is provided at a position facing the projection 825B. Therefore, the burr Br formed on the projection surface 825Bs of the projection 825B is accommodated in the recess 93d, and the projection surface 825Bs comes into contact with the outer peripheral surface 9a3 without any gap. Therefore, at the time of press-fitting when the stator 8 is press-fitted into the sleeve 9, generated chips are securely sealed between the inner peripheral surface 823Bs of the stator 8 and the outer peripheral surface of the sleeve 9, and the reliability of the motor device 1 is improved. Is not affected.

(5) Application Example of Motor Device 1 of Present Embodiment Next, as an application example of the above-described motor device 1 of the present embodiment, an outline of a vehicle headlight on which the motor device 1 of the present embodiment can be mounted will be described. This will be described with reference to FIG. FIG. 15 is a horizontal sectional view of the vehicle headlamp. The vehicle headlamp 10 shown in FIG. 15 is a left headlamp mounted on the left side of the front end of the automobile, and has the same structure as the headlamp mounted on the right side except that it is symmetrical. Therefore, hereinafter, the left vehicle headlamp 10 will be described in detail, and the description of the right vehicle headlamp will be omitted.

よ う As shown in FIG. 15, the vehicle headlamp 10 includes a lamp body 12 having a concave portion that opens forward. The lamp body 12 has a front opening covered with a transparent front cover 14 to form a lamp chamber 16. The light room 16 functions as a space in which the lamp unit 18 is housed.

The lamp unit 18 is a unit that employs a blade scan type ADB (Adaptive DrivingamBeam) technology, and is configured to emit a so-called variable high beam. The lamp unit 18 includes an optical unit 20 and a projection lens 27. The optical unit 20 includes a rotating reflector 60 and the light source 26. As the projection lens 27, for example, a convex lens is used. The shape of the convex lens may be appropriately selected according to the light distribution characteristics such as a required light distribution pattern and illuminance distribution, and an aspheric lens or a free-form surface lens is used. An extension reflector 23 is provided around the projection lens 27.

The rotating reflector 60 reflects light emitted from the light source 26 while the blade 60b rotates in one direction around the rotation axis R by the motor 30 as a driving source, and scans the reflected light to form a light distribution pattern. Are formed. Further, the blade 60b includes an annular reflection region 60a configured to reflect the light emitted from the light source 26 while rotating, and to form a desired light distribution pattern.

ブ レ ー ド The shape of the blade 60b of the rotary reflector 60 is configured such that the secondary light source of the light source 26 due to reflection is formed near the focal point of the projection lens 27. The blade 60b has a shape twisted such that the angle formed by the optical axis Ax and the reflection surface changes in the circumferential direction around the rotation axis R. Thereby, scanning using light (light source image) of the light source 26 becomes possible.

(4) The light source 26 is preferably capable of controlling turning on and off in a short time. For example, a semiconductor light emitting element such as an LED, an LD, and an EL element is suitable.

The motor 30 is mounted on the board 92. The substrate 92 is mounted and fixed on a mounting surface 94a of the heat sink 94. The mounting surface 94a is configured such that the rotation axis R of the rotary reflector 60 is inclined with respect to the optical axis Ax or the forward direction of the vehicle when the substrate 92 is mounted.

The light source 26 is mounted on the substrate 36. A lens 38 as a primary optical system is provided between the light source 26 and the rotary reflector 60 in the light emission direction. The lens 38 condenses the light emitted from the light source 26 so that the light emitted from the light source 26 goes to the reflection area 60 a of the rotary reflector 60. The substrate 36 is mounted on the heat sink 40. The heat sink 94 and the heat sink 40 are fixed to a metal plate-shaped support member 42. The lamp unit 18 is supported by a means using an aiming screw 44 and a nut 46 via a support member 42 so as to be tiltable with respect to the lamp body 12.

The control circuit 48 is connected to the light source 26 and the motor 30 via each substrate, and transmits a signal for controlling the light source 26 and the motor 30 and receives a signal output from the motor 30.

In the vehicle headlight 10, the rotary reflector 60 corresponds to the rotating body 6 of the motor device 1 of the present embodiment, and the motor 30 corresponds to the motor of the motor device 1 of the present embodiment. As described above, the motor device 1 of the present embodiment is applicable to the vehicle headlamp 10.

Although the embodiment of the motor device of the present invention has been described in detail above, the scope of the present invention is not limited to the above embodiment. Further, the above-described embodiment can be variously improved or changed without departing from the gist of the present invention.

Claims (3)

1. A cylindrical member;
   A stator including: a stator core having an inner hole; an insulating member attached to the stator core; and a coil formed of a conductive wire wound around the stator core via the insulating member.
   With
   The stator core is attached to the cylindrical member such that the inner peripheral surface of the stator core contacts the outer peripheral surface of the cylindrical member,
   The insulating member has a cylindrical portion extending from the stator core along an outer peripheral surface of the cylindrical member,
   At the end of the inner peripheral surface of the cylindrical portion, a projection that contacts the outer peripheral surface of the cylindrical member is formed,
   On the outer peripheral surface of the cylindrical member, a recess is provided at a position facing the projection,
   Motor device.
2. The cylindrical member and the stator core are attached by press fitting,
   The cylindrical member and the stator core are configured such that the projection comes into contact with the outer peripheral surface of the cylindrical member at the start of press fitting.
   The motor device according to claim 1.
3. The insulating member is made of resin,
   The motor device according to claim 1.

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