JP7246152B2 - motor device - Google Patents

Description

The present invention relates to motor devices.

2. Description of the Related Art In a motor device, it is necessary to establish electrical continuity between a coil made of a conductive wire wound around a stator core via an insulating member and a circuit board. For example, in the motor disclosed in Patent Literature 1, lead wires at the winding start and winding end of the coil are connected to a printed circuit board.

JP 2017-135854 A

2. Description of the Related Art In manufacturing a motor device, when connecting a coil to a circuit board, one end of the coil or a conductive member such as a conductive pin connected to one end of the coil is soldered onto the circuit board. At this time, when soldering is performed on the main mounting surface of the circuit board, it is necessary to secure a solder fillet area on the main mounting surface. There is

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to prevent impairing the efficient mounting of components and wiring on the main mounting surface of a circuit board when the coil and the circuit board are electrically connected when manufacturing a motor device. .

An illustrative first invention of the present application comprises a circuit board having a through hole, a stator core arranged to face a first surface which is one surface of the circuit board, and a conductive wire wound around the stator core. a stator having a coil; and a cover arranged to face a second surface opposite to the first surface of the circuit board and covering the second surface of the circuit board, wherein the coil, or the coil a conductive member protruding from the second surface through the through hole, the cover having an opening exposing the through hole, the cover having the second surface of the circuit board at the opening; It has a wall surface extending from a reference surface opposite to the facing surface toward the second surface of the circuit board, and the wall surface gradually increases from the reference surface toward the second surface of the circuit board. The motor device has an inclined surface that is inclined inside the opening .

Advantageous Effects of Invention According to the present invention, it is possible to prevent impairing efficient mounting of components and wiring on the main mounting surface of the circuit board when the coil and the circuit board are electrically connected when manufacturing the motor device.

It is a perspective view from one side of the motor device of the embodiment. It is a perspective view from the other side of the motor device of the embodiment. It is a sectional view of a motor device of an embodiment. 1 is an exploded perspective view of main parts of a motor device of an embodiment; FIG. 2 is an exploded perspective view of the motor device of the embodiment, excluding coils of the stator; FIG. 4 is an enlarged front view of one insulator included in the stator; FIG. FIG. 4 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 the embodiment. FIG. 4 is a view of the structure in an assembled state after press-fitting the stator into the sleeve when assembling the motor device of the embodiment, as seen from the circuit board side in the axial direction; Figure 10 is an enlarged sectional view of the assembled structure of Figure 9; FIG. 4 is a view of the structure in an assembled state after press-fitting the stator into the sleeve when assembling the motor device of the embodiment, as seen from the cover side in the axial direction; FIG. 12 is a cross-sectional view taken along the line AA of FIG. 11; 1 is a horizontal sectional view of a vehicle headlamp to which a motor device of an embodiment is applied; FIG.

An embodiment of the motor device of the present invention will be described below.

(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 the 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 of the embodiment. FIG. 4 is an exploded perspective view of main components of the motor device 1 of 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 (axis CTR in FIG. 3) of the shaft 5 which is the rotation axis of the motor.

As shown in FIGS. 1 to 3, the exemplary motor device 1 of this 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 DC brushless motor to rotate the rotating body 6 .

The cover 2 is made of resin, for example, and has a cuboid 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, for example iron or aluminum, and is placed in a central hole in 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 coils (windings) 83 of the stator 8 and conduction pins 84 (an example of a conductive member; see FIGS. 3 and 4), and has a control circuit (not shown) mounted thereon. . The circuit board 3 supplies current to the coil 83 .
As shown in FIG. 4, the circuit board 3 has a first surface 3a on the side of the yoke 4 and a second surface 3b on the side of the cover 2 on the back side of the first surface 3a. have. The first surface 3a is the main mounting surface on which main circuit components are mounted.
An inner hole 3h is formed in the vicinity of the center of the circuit board 3, and the circuit board 3 and the sleeve 9 are connected by press-fitting the inner hole 3h into the outer peripheral surface of the sleeve 9. As shown in FIG.
The circuit board 3 has two through holes 32 . As shown in FIGS. 2 and 3 , screws 22 are fastened to cover 2 through through holes 32 to restrict circumferential displacement of circuit board 3 with respect to 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 .

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, one end of which is fixed to the coil 83 of the stator 8, passes through the through-hole 34 of the circuit board 3 and passes through the second surface 3b of the circuit board 3 ( (surface on the cover 2 side) is soldered. The opening 24 of the cover 2 is provided for efficient soldering of the conductive pin 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 metal, for example, and the yoke 4 and the support portion 41 are joined by crimping the support portion 41 . The support portion 41 is pressed against the inner surface of the yoke 4 (leftward in FIG. 3) in the axial direction of FIG.
One end of the shaft 5 is press-fitted into the support portion 41 and the other end of the shaft 5 is fixed to the rotating body 6 . The shaft 5 passes through the sleeve 9 and is supported by bearings 51 and 52 on one end side and the other end side of the sleeve 9 in the axial direction, respectively.

As shown in FIGS. 2 and 4, the yoke 4 has a generally annular shape. A magnet 7 is press-fitted into the inner peripheral surface of the yoke 4 (see FIG. 3). The magnet 7 is magnetized so that N poles and S poles are alternately arranged in the circumferential direction. The yoke 4 is made of a magnetic material and prevents the magnetic field generated by the magnet 7 from leaking outside the magnet 7 .

As shown in FIG. 3 , the stator 8 is arranged to face the first surface 3 a of the circuit board 3 . and a coil 83 made of a wound conductor wire.
In this embodiment, the magnet 7 and the shaft 5 constitute a rotor. The motor of this 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 coils 83. FIG. FIG. 6 is an enlarged front view of the first insulator 82A 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 rotor 6 side in the axial direction. FIG. 8 is an enlarged front view of the stator 8 (viewed from the yoke 4 side).

5 shows stator core 81, insulating member 82 (first insulator 82A, second insulator 82B), and conduction pin 84. FIG.
As shown in FIG. 5 , the stator core 81 is a laminated body in which a plurality of magnetic steel plates are laminated in the axial direction (horizontal direction in FIG. 3 ) and fixed, and has a plurality of teeth 811 . In the example of this embodiment, the teeth 811 are provided at intervals of 90 degrees in the circumferential direction of the stator core 81 .
A central portion of the stator core 81 is formed with an inner hole 81h. The inner peripheral surface 81a of the inner hole 81h is press-fitted to the outer peripheral surface of the sleeve 9 when the stator 8 is coupled with the sleeve 9. As shown in FIG. That is, the stator core 81 is attached to the sleeve 9 so that the inner peripheral surface 81 a of the inner hole 81 h of the stator core 81 is in contact with 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 between the coil 83 and the teeth 811. A first insulator 82A and a second insulator sandwich 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 tooth cover portions 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 extending 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 where the stator core 81 is provided with the tooth cover portion 821A as a reference. A wall portion 822A extends axially on the side where the stator core 81 is provided with the tooth cover portion 821A as a reference.
As shown in FIGS. 5 and 7, the second insulator 82B has tooth cover portions 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 an inner peripheral wall 823B protruding in the axial direction at the periphery of the inner hole 82Bh. That is, the inner peripheral wall 823B extends in the axial direction on the side opposite to the side where the stator core 81 is provided with the tooth cover portion 821B as a reference. A wall portion 822B extends axially on the side where the stator core 81 is provided with the tooth cover portion 821B as a reference.
As described above, the first insulator 82A and the second insulator 82B each 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. It has wall surfaces (wall surfaces of the inner peripheral walls 823A and 823B) separating the coil 83 from the coil 811 . By providing the inner peripheral walls 823A and 823B, the insulation between the coil 83 and the teeth 811 is ensured.

Referring to FIGS. 5 and 6 again, a notch 823Ah is formed in the inner peripheral wall 823A of the first insulator 82A. As will be described later, the notch 823Ah is provided to expose the surface of the stator core 81 when the stator 8 is assembled, and to facilitate press-fitting of the stator 8 into the sleeve 9 . That is, the first insulator 82A has a notch 823Ah along the periphery of the inner hole 82Ah corresponding to the exposed surface of the stator core 81. As shown in FIG.
A projection 823Aj is provided in the notch portion 823Ah from the inner peripheral wall 823A toward the outside in the radial direction. The protrusions 823Aj are provided to ensure insulation between the coil 83 and the teeth 811 at the cutouts 823Ah.

5 and 7, the second insulator 82B extends axially and has a tubular portion 824B for the conducting pin 84 to pass therethrough. The cylindrical portion 824B is supported by a wall portion 822B formed in the axial direction, thereby ensuring sufficient strength of the cylindrical portion 824B.
No notch is provided in the inner peripheral wall 823B of the second insulator 82B.

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

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

As shown in FIG. 10, when the stator 8 is press-fitted into the sleeve 9, the inner hole 81h of the stator core 81 of the stator 8 is axially (press-fitting direction D from the first surface 3a to the second surface 3b of the circuit board 3). The inner peripheral surface 81 a is brought into contact with the outer peripheral surface 9 a of the sleeve 9 . When press-fitting, the cover 2 is fixed to the equipment, and the stator 8 is pushed in by a predetermined amount in the press-fitting direction by means of a press-fitting jig.
As described above, when the stator 8 is press-fitted, one end of the conduction pin 84 is soldered to the coil 83, so the operator checks whether or not the end of the conduction pin 84 is soldered. By doing so, it is possible to prevent the stator 8 from being press-fitted in the wrong direction.

In this embodiment, when the stator 8 is pushed in by the press fitting jig, the stator core 81 is partly exposed. can be securely press-fitted into the
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 against which the jig is pressed in the axial direction of the sleeve 9. The inner peripheral surface 81a of the inner hole 81h of the stator core 81 can be reliably press-fitted into the outer peripheral surface 9a of the sleeve 9 by bringing them into contact with each other and pushing them in the axial direction (the direction toward the back of the paper surface of FIG. 8).
The exposed surface of stator core 81 shown in FIG. Of the exposed surfaces, the peripheral edge region 811a of the inner hole 81h is located on the surface of the stator core 81 closest to the outer peripheral surface 9a of the sleeve 9 when the stator 8 is press-fitted into the sleeve 9. , the stator 8 can be press-fitted more reliably.

As described with reference to FIG. 6, a notch 823Ah is formed in the inner peripheral wall 823A of the first insulator 82A. Therefore, after the first insulator 82A is assembled to the stator core 81, as shown in FIG. 8, the surface of the stator core 81 is exposed through the notch 823Ah to form an exposed protruding region 811p. 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 the inner peripheral wall 823A of the first insulator 82A were provided outside the state shown in FIG. 6, it would be possible to widen the peripheral edge region 811a of the exposed surface. However, as shown in FIG. 3, the outer shape of the stator 8 as a whole cannot be widened to secure a gap between the magnets 7. The radial size of 811 is sacrificed, affecting motor performance. Therefore, a notch portion 823Ah is locally provided in the inner peripheral wall 823A of the first insulator 82A in the circumferential direction, thereby providing a projecting region 811p of the exposed surface of the stator core 81. As shown in FIG. Therefore, it is possible to secure an effective exposed area without affecting the performance of the motor.

In the example of the present embodiment, four projecting regions 811p are formed on the exposed surface along the periphery of the inner hole 81h of the stator core 81 . A 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 protruding regions 811p are positioned relatively close to the outer peripheral surface 9a of the sleeve 9, the stator 8 is reliably press-fitted.

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

As described with reference to FIG. 6, the first insulator 82A is provided with a protrusion 823Aj directed radially outward from the inner peripheral wall 823A at the notch 823Ah. Therefore, when the stator 8 is assembled, the protrusions 823Aj of the first insulator 82A are configured to surround at least a portion of the protruding regions 811p of the exposed surface of the stator core 81, as shown in FIG. Therefore, the insulation between the teeth 811 and the coils 83 in the projecting regions 811p is ensured.

In addition, unlike the inner peripheral wall 823A of the first insulator 82A, the inner peripheral wall 823B of the second insulator 82B is not provided with a notch. Therefore, when the stator 8 is assembled, when the stator 8 is viewed from the second insulator 82B side, the exposed surface of the stator core 81 does not have a protruding region that protrudes radially outward from the inner hole 81h. That is, the projecting region is provided only on the surface of the stator core 81 on the side of the first insulator 82A in the axial direction of the sleeve 9, and is not provided on the surface of the stator core 81 on the side of the second insulator 82B 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 prevent incorrect assembly of the stator 8 in the wrong direction when press-fitting it into the sleeve 9 .

(4) Soldering of Conductive Pins 84 Next, soldering of the conductive pins 84 when assembling the motor device 1 of the present embodiment will be described with reference to FIGS. 10 to 12. FIG.
FIG. 11 is a view of the assembled structure after the stator 8 is press-fitted into the sleeve 9 when assembling the motor device 1 of the present embodiment, viewed from the second surface 3b side of the circuit board 3 in the axial direction. is. FIG. 12 is a sectional view taken along the line AA of FIG. 11. FIG.

When the stator 8 is press-fitted, the conductive pin 84 is inserted into the tubular portion 824B of the second insulator 82B of the stator 8 and one end of the conductive pin 84 is soldered to the coil 83 . When the stator 8 is press-fitted into the sleeve 9, the stator 8 moves on the outer peripheral surface of the sleeve 9 so that the other end of the conductive pin 84 which is not soldered becomes the tip in the press-fitting direction D (see FIG. 10). . In the following description, the end of the conduction pin 84 that becomes the tip in the press-fitting direction D (that is, the end on the cover 2 side) when the stator 8 is press-fitted is referred to as the first end of the conduction pin 84 .

As shown in FIG. 4, the circuit board 3 is provided with through holes 34 through which the conduction pins 84 are passed. When the stator 8 is press-fitted into the sleeve 9, as shown in FIG. protrude.
As shown in FIG. 11 , the cover 2 has an opening 24 that exposes the through hole 34 of the circuit board 3 . Therefore, a soldering jig such as a soldering iron can be brought into contact with the first end 84a of the conductive pin 84 through the opening 24, and the first end 84a of the conductive pin 84 can be connected to the second surface 3b of the circuit board 3 ( (non-main mounting surface). That is, in the motor device 1 of the present embodiment, since the conductive position of the coil 83 with respect to the circuit board 3 is the second surface 3b of the circuit board 3 which is not the main mounting surface, the first surface 3a which is the main mounting surface of the circuit board 3 It is possible not to impair the efficient mounting of components and wiring in the device.

In addition, in the example of the present embodiment, the opening 24 is substantially rectangular, but it is not limited thereto and can be appropriately determined according to the shape of the circuit board 3 . From the viewpoint of soldering workability, it is preferable to make the opening area of the opening 24 as large as possible.

Referring to Figure 12, the detailed shape of the opening 24 in the cover 2 is shown. As shown in FIG. 12, the cover 2 has a wall surface 24W extending from the reference surface 2b of the cover 2 toward the second surface 3b of the circuit board 3, whereby the opening 24 is formed. As shown in FIG. 10, the reference surface 2b of the cover 2 is a surface that is orthogonal to the axial direction and coincides with the cover 2 side end surface of the sleeve 9 in the axial direction. The wall surface 24</b>W is formed to a position close to the second surface 3 b of the circuit board 3 , thereby suppressing entry of foreign matter into the circuit board 3 through the opening 24 . The minimum value of the gap between the wall surface 24W and the second surface 3b of the circuit board 3 is, for example, such that a short circuit (for example, a short circuit between IC pins) does not occur even if a foreign object enters the circuit board 3. value.

The wall surface 24W has an inclined surface 241 that inclines toward the inside of the opening 24 from the reference surface 2b toward the second surface 3b of the circuit board 3 . By providing the inclined surface 241, a soldering jig can be used when soldering the first end 84a of the conductive pin 84 without requiring a large area for the portion where the second surface 3b of the circuit board 3 is exposed through the opening 24. It becomes possible to perform soldering from an oblique direction, and the workability of soldering can be improved.

Further, the wall surface 24W has an orthogonal surface 242 perpendicular to the reference surface 2b as it goes from one end of the inclined surface 241 on the second surface 3b side of the circuit board 3 toward the second surface 3b. Supposing that the inclined surface 241 is provided to the vicinity of the second surface 3b of the circuit board 3, since the inclined surface 241 is inclined toward the inside of the opening 24, the end portion of the inclined surface 241 near the second surface 3b is It forms an acute angle when viewed in cross section, and burrs are likely to occur during molding. On the other hand, in the present embodiment, by providing the orthogonal surface 242, the end portion of the wall surface 24W near the second surface 3b can be formed at a right angle in a cross-sectional view, and the generation of burrs during molding can be suppressed. .

(5) Application example of the motor device 1 of the present embodiment Next, as an application example of the motor device 1 of the present embodiment described above, an outline of a vehicle headlamp in which the motor device 1 of the present embodiment can be mounted will be described. Description will be made with reference to FIG. FIG. 13 is a horizontal sectional view of the vehicle headlamp. The vehicle headlamp 10 shown in FIG. 13 is a left headlamp mounted on the left side of the front end of an automobile, and has the same structure as the headlamp mounted on the right side except that it is bilaterally symmetrical. Therefore, the left vehicle headlamp 10 will be described in detail below, and the description of the right vehicle headlamp will be omitted.

As shown in FIG. 13, the vehicle headlamp 10 includes a lamp body 12 having a recess opening forward. The lamp body 12 has a front opening covered with a transparent front cover 14 to form a lamp chamber 16 . The lamp chamber 16 functions as a space in which the lamp unit 18 is accommodated.

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

The rotating reflector 60 reflects the light emitted from the light source 26 while rotating the blade 60b in one direction around the rotation axis R by the motor 30, which is a driving source, and scans the reflected light to form a light distribution pattern. is configured to form The blade 60b also has an annular reflecting area 60a configured to rotate and reflect the light emitted from the light source 26 to form a desired light distribution pattern.

The blade 60 b of the rotating reflector 60 is shaped so that a secondary light source of the light source 26 is formed near the focal point of the projection lens 27 by reflection. Further, the blade 60b has a twisted shape so that the angle formed by the optical axis Ax and the reflecting surface changes as it goes in the circumferential direction about the rotation axis R. This enables scanning using light from the light source 26 (light source image).

The light source 26 is preferably one that can be turned on and off in a short period of time, and is preferably a semiconductor light-emitting device such as an LED, LD, or EL device.

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

Light source 26 is mounted on substrate 36 . A lens 38 as a primary optical system is provided between the rotating reflector 60 and the light emitting direction of the light source 26 . The lens 38 collects the light emitted from the light source 26 so that the light emitted from the light source 26 is directed toward the reflecting area 60 a of the rotating reflector 60 . Substrate 36 is mounted on 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 tiltably supported with respect to the lamp body 12 by means of an aiming screw 44 and a nut 46 via a support member 42 .

The control circuit 48 is connected to the light source 26 and the motor 30 via respective substrates, and transmits signals for controlling the light source 26 and the motor 30 and receives signals output from the motor 30 .

In the vehicle headlamp 10, the rotary reflector 60 corresponds to the rotor 6 of the motor device 1 of this embodiment, and the motor 30 corresponds to the motor of the motor device 1 of this embodiment. As described above, the motor device 1 of this embodiment can be applied to the vehicle headlamp 10 .

Although the embodiments of the motor device of the present invention have been described above in detail, the scope of the present invention is not limited to the above embodiments. Also, the above embodiments can be modified and modified in various ways without departing from the gist of the present invention.

In the above-described embodiment, as shown in FIG. 8, the protruding regions 811p of the exposed surface of the stator 8 are arranged at equal intervals in the circumferential direction of the inner hole 81h of the stator core 81. do not have. The protruding regions 811p may not be evenly spaced in the circumferential direction of the inner hole 81h of the stator core 81, and the number of protruding regions 811p is not limited to four. When the protruding regions 811p are arranged at equal intervals in the circumferential direction of the inner hole 81h, they may be arranged at equal intervals in the circumferential direction between adjacent teeth, or may be arranged at equal intervals in the circumferential direction regardless of the positions of the teeth. They may be arranged at predetermined angles.

In the embodiment described above, as shown in FIGS. 7 and 8, an example in which four cylindrical portions 824B for inserting the conduction pins 84 are provided is shown, but the present invention is not limited to this. The number of tubular portions 824B may be, for example, three.

In the above-described embodiment, the case where the coil 83 and the circuit board 3 are electrically connected via the conduction pin 84 has been described as an example, but this is not the only case. By inserting the ends of the coil 83 into the tubular portion 824B of the second insulator 82B and the through hole 34 of the circuit board 3 and soldering them on the second surface 3b of the circuit board 3, the coil 83 and the circuit board 3 are connected. and may be electrically connected.

DESCRIPTION OF SYMBOLS 1... Motor apparatus 2... Cover 2b... Reference plane 21... Board placement part 24... Opening 24W... Wall surface 241... Inclined surface 242... Orthogonal plane 3... Circuit board 3a... First surface 3b 2nd surface 32, 34 through hole 4 yoke 41 support 5 shaft 51, 52 bearing 53 coil spring 6 rotor 7 magnet 8 stator 81 Stator core 81h Inner hole 81a Inner peripheral surface 811 Teeth 811a Peripheral region 811p Protruding region 812 Teeth wall surface 82 Insulating member 82A First insulator 82Ah Inner hole 821A Teeth cover portion 822A Wall portion 823A Inner peripheral wall surface 823Ah Notch portion 823Aj Projection 82B Second insulator 82Bh Inner hole 821B Teeth cover portion 822B Wall portion 823B... Inner peripheral wall surface 824B... Cylindrical part 822B... Wall part 83... Coil 84... Conductive pin 9... Sleeve 9a... Outer peripheral surface 10... Vehicle headlamp 12... Lamp body 14... Front cover 16 Lamp chamber 18 Lamp unit 20 Optical unit 27 Projection lens 30 Motor 60 Rotating reflector 60a Reflection area 60b Blade 26 Light source 92 Substrate 40 , 94... Heat sink 94a... Mounting surface 36... Substrate 38... Lens 42... Supporting member 44... Aiming screw 46... Nut

Claims (2)

a circuit board having a through hole;
a stator disposed facing a first surface, which is one surface of the circuit board, and having a stator core and a coil made of a conductor wire wound around the stator core;
a cover arranged to face a second surface opposite to the first surface of the circuit board and covering the second surface of the circuit board;
with
the coil or a conductive member in contact with the coil protrudes from the second surface through the through hole;
The cover has an opening that exposes the through hole,
the cover has a wall surface extending toward the second surface of the circuit board from a reference surface, which is the surface opposite to the surface facing the second surface of the circuit board, in the opening;
The wall surface has an inclined surface that inclines toward the inside of the opening from the reference surface toward the second surface of the circuit board,
motor device. The wall surface has an orthogonal plane orthogonal to the reference plane from one end of the inclined surface toward the second surface of the circuit board,
A motor device according to claim 1 .

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