JP5688235B2 - Beam switching device for rotary solenoid and vehicle headlamp - Google Patents

Description

The present invention relates to a beam switching device for a rotary solenoid and a vehicle headlamp. More specifically, the present invention relates to a technical field in which a rotor having a drive coil is disposed inside a permanent magnet that functions as a stator to achieve downsizing and noise reduction.

  Vehicle headlamps, for example, are those in which a light source and a shade capable of shielding a part of light emitted from the light source are arranged inside a lamp outer casing constituted by a cover and a lamp housing. is there.

  Among such vehicle headlamps, there is one in which light emitted from a light source can be switched between a low beam that irradiates a short distance and a high beam that irradiates a long distance by a beam switching device (for example, Patent Documents). 1 and Patent Document 2).

  In the beam switching device described in Patent Document 1, a so-called linear solenoid in which a drive shaft operates linearly is used as an actuator. In a beam switching device using a linear type solenoid, the shade is moved to one side by moving the drive shaft in one direction and switched to the low beam, and the drive shaft is moved in the other direction. The shade is moved to the other and switched to the high beam.

  In the beam switching device described in Patent Document 2, a drive motor is used as an actuator. In a beam switching device using a drive motor, the shade is moved by rotating the motor shaft in one direction to move the shade to one side and switching to the low beam, and rotating the motor shaft in the other direction. It is moved to the other and switched to the high beam.

JP 2003-257218 A JP 2007-220676 A

  However, in the vehicle headlamp described in Patent Document 1, a linear solenoid is used as an actuator, and since the drive shaft is operated linearly, the moving space is large and the size is reduced. Is difficult.

  Further, since the driving force of the linear solenoid decreases in inverse proportion to the square of the moving stroke, there is a possibility that a predetermined driving force cannot be obtained when the moving stroke increases. Therefore, it is necessary to increase the size of the actuator in order to ensure a predetermined driving force, which also hinders downsizing.

  In the vehicle headlamp described in Patent Document 2, a drive motor is used as an actuator, and rectification is performed. However, rectification causes radio wave noise and hunting, resulting in operation. Reliability may be reduced.

Accordingly, it is an object of the present invention to reduce the size and improve the operation reliability of the rotary solenoid and the beam switching device for a vehicle headlamp.

In order to solve the above-described problems, the rotary solenoid includes a stator constituted by a pair of permanent magnets, a shaft portion serving as a rotation center, a plurality of coil winding portions projecting radially from the shaft portion, and the A plurality of drive coils each wound around a plurality of coil winding portions and having a winding direction of at least one drive coil opposite to a winding direction of another drive coil, and inside the stator A rotor rotated around a shaft, a body in which the stator and the rotor are arranged, and a shaft attached to the rotor and rotatably supported by the body, a part of which protrudes from the body The output shaft is rotated integrally with the rotor, and the first connection portion, the second connection portion, and both ends of the drive coil are in contact with each other. A connecting body having a pair of coil connecting portions to be provided with a pair of brushes having a connection surface that is respectively connectable fixed to the body and the first connecting portion to the second connecting portion, One brush is connected only to the first connection part and the other brush is connected only to the second connection part so that rectification does not occur in the pair of brushes, and the first connection of the connection body And the second connecting portion are spaced apart from each other in the axial direction of the output shaft, the rotor is provided with a regulated protrusion, and the stator can be brought into contact with the regulated protrusion to restrict the rotation of the rotor. The control protrusion which performs is provided .

Therefore, in the rotary solenoid , the rotor is rotated around the shaft portion inside the stator formed by the pair of permanent magnets by energizing the plurality of drive coils.

In order to solve the above-described problems, a beam switching device for a vehicle headlamp is disposed inside a lamp housing formed by a lamp housing opened on one side and a cover closing the opening of the lamp housing. In addition, a part of the light emitted from the light source disposed inside the lamp outer casing can be shielded and moved in a predetermined direction by the driving force of the actuator to be emitted from the light source. A beam switching device for a vehicle headlamp that switches an irradiation range of light, wherein the actuator includes a stator composed of a pair of permanent magnets, a shaft portion serving as a rotation center, and a radial portion from each of the shaft portions. protruded a plurality of coil winding part and the winding direction of other driving coil of said plurality of at least one drive coil wound respectively around the coil winding part A rotor which is rotated about said shaft portion inside the stator and having a plurality of drive coils in opposite to the winding direction, the body of placing the stator and the rotor therein, said rotor An output shaft that is rotatably supported by the body and partially protrudes from the body, is rotated integrally with the rotor, and is connected to the first connecting portion and the second connecting portion. A connection body having a pair of coil connection portions to which both ends of the drive coil are respectively connected, and a connection surface fixed to the body and connectable to the first connection portion and the second connection portion, respectively. and a pair of brushes with the pair of brushes other brush with the one brush so commutation does not occur is connected only to the first connecting portion is the first The first connecting portion and the second connecting portion of the connecting body are arranged apart from each other in the axial direction of the output shaft, a regulated protrusion is provided on the rotor, and the stator is connected to the stator. A regulating projection that is capable of contacting the regulated projection and regulates the rotation of the rotor is provided .

  Therefore, in the vehicle headlamp beam switching device, the rotor is rotated around the shaft portion inside the stator formed by the pair of permanent magnets by energizing the plurality of drive coils, and the light source The irradiation range of the light emitted from is switched.

The rotary solenoid according to the present invention includes a stator constituted by a pair of permanent magnets, a shaft portion serving as a rotation center, a plurality of coil winding portions projecting radially from the shaft portion, and a plurality of coil winding portions. A plurality of drive coils each wound and having a winding direction of at least one drive coil opposite to the winding direction of the other drive coil, and rotated around the shaft portion inside the stator. A rotor in which the stator and the rotor are disposed, an output shaft that is attached to a shaft portion of the rotor and that is rotatably supported by the body and partially protrudes from the body, and the rotor A pair of coil connections in which the first connection portion, the second connection portion, and both ends of the drive coil are connected to each other and rotated together. Comprising a connecting member having bets, and a pair of brushes having a connection surface that is respectively connectable fixed to the body and the first connecting portion to the second connecting portion, said pair of brush rectification One brush is connected only to the first connection part and the other brush is connected only to the second connection part so that it does not occur, and the first connection part and the second connection part of the connection body Are arranged apart from each other in the axial direction of the output shaft, the rotor is provided with a regulated projection, and the stator is provided with a regulation projection capable of contacting the regulated projection and regulating the rotation of the rotor. It is characterized by that.

  Therefore, a rotary solenoid having a rotor that is rotated inside the stator is used as an actuator, and the driving force does not decrease in inverse proportion to the moving stroke unlike a linear solenoid, and a small actuator is used. Therefore, the size can be reduced.

  Further, since rectification is not performed unlike the drive motor, radio wave noise due to rectification or hunting does not occur, and operation reliability can be improved.

Moreover, since the 1st connection part and 2nd connection part of the said connection body are spaced apart and arrange | positioned in the axial direction of the said output shaft, a short circuit can be prevented reliably. Furthermore, even if the rotor rotational force is applied by vibration or the like, the regulated projection of the rotor can be brought into contact with the regulation projection of the stator, so that the rotation of the rotor more than necessary can be regulated.

In the invention described in claim 2 , since the connection surfaces of the pair of brushes are positioned to face each other, the wiring work of the connection cord connected to the brush can be easily performed. .

In the invention described in claim 3 , the connection body is constituted by a first connection member having the first connection portion and a second connection member having the second connection portion, and An arrangement notch is formed in the two connection members, and a part of the first connection member is arranged in the arrangement notch of the second connection member.

  Therefore, it is possible to reduce the size of the actuator by reducing the arrangement space of the connection body.

The beam switching device for a vehicle headlamp according to the present invention is disposed inside a lamp casing formed by a lamp housing opened on one side and a cover that closes the opening of the lamp housing. A vehicle that switches a radiation range of light emitted from the light source by moving a shade that can be shielded and moved in a predetermined direction by a driving force of an actuator. A beam switching device for a headlamp for a vehicle, wherein the actuator includes a stator composed of a pair of permanent magnets, a shaft portion serving as a center of rotation, and a plurality of coil windings projecting radially from the shaft portion. Conversely times unit the winding direction of the plurality of at least one drive coil respectively wound on the coil winding portion to the winding direction of the other drive coil A rotor that rotates around the shaft portion inside the stator, a body that has the stator and the rotor disposed therein, and a shaft that is attached to the shaft portion of the rotor. An output shaft that is rotatably supported by the body and a part of the output shaft projects from the body, and is rotated integrally with the rotor, and the first connection portion, the second connection portion, and both ends of the drive coil are connected to each other. A connection body having a pair of coil connection portions, and a pair of brushes having connection surfaces fixed to the body and connectable to the first connection portion and the second connection portion, respectively . One brush is connected only to the first connection portion and the other brush is connected only to the second connection portion so that the pair of brushes does not rectify. The first connection portion and the second connection portion of the connection body are arranged apart from each other in the axial direction of the output shaft, the regulated protrusion is provided on the rotor, and the regulated projection can be brought into contact with the stator. And a restricting projection for restricting the rotation of the rotor .

  Therefore, a rotary solenoid having a rotor that is rotated inside the stator is used as an actuator, and the driving force does not decrease in inverse proportion to the moving stroke unlike a linear solenoid, and a small actuator is used. Therefore, the size can be reduced.

Further, since rectification is not performed unlike the drive motor, radio wave noise due to rectification or hunting does not occur, and the operation reliability of the actuator can be improved. Moreover, since the 1st connection part and 2nd connection part of the said connection body are spaced apart and arrange | positioned in the axial direction of the said output shaft, a short circuit can be prevented reliably. Furthermore, even if the rotor rotational force is applied by vibration or the like, the regulated projection of the rotor can be brought into contact with the regulation projection of the stator, so that the rotation of the rotor more than necessary can be regulated.

  The best mode for carrying out the actuator and the beam switching device for a vehicle headlamp will be described below with reference to the accompanying drawings.

  The vehicle headlamps 1 are respectively attached to the left and right end portions of the front end portion of the vehicle body.

  As shown in FIG. 1, the vehicle headlamp 1 includes a lamp housing 2 having a recess opened forward and a cover 3 that closes the opening surface of the lamp housing 2. The lamp housing 2 and the cover 3 constitute a lamp outer casing 4, and an inner space of the lamp outer casing 4 is formed as a lamp chamber 5.

  A mounting hole 2 a penetrating in the front-rear direction is formed at the rear end of the lamp housing 2. A back cover 6 that closes the mounting hole 2 a is attached to the rear end of the lamp housing 2.

  A lamp unit 7 is disposed in the lamp chamber 5. The lamp unit 7 includes a lens holder 8, a projection lens 9 attached to the front end portion of the lens holder 8, a reflector 10 attached to the rear surface of the lens holder 8, and a light source 11 attached to the rear end portion of the reflector 10. Have.

  The lamp unit 7 is supported by the lamp housing 2 via an optical axis adjusting mechanism (not shown). Accordingly, the optical axis adjustment mechanism (aiming adjustment or leveling adjustment) of the light emitted from the light source is performed by moving the lamp unit 7 in the vertical direction or the horizontal direction with respect to the lamp housing 2 by operating the optical axis adjustment mechanism. Is possible.

  The lens holder 8 is formed in a substantially cylindrical shape penetrating in the front-rear direction. A rotating shaft 12 extending vertically is fixed to the upper end portion of the lens holder 8, and the rotating shaft 12 is rotatably supported by a support member 13 positioned above the lens holder 8 in the lamp chamber 5. Accordingly, the lamp unit 7 having the lens holder 8 can be rotated in the left-right direction with respect to the lamp outer casing 4 with the rotation shaft 12 as a fulcrum.

  The rotation of the lamp unit 7 in the left-right direction with respect to the lamp outer casing 4 is performed in conjunction with the driver's steering operation.

  An actuator 14 is disposed on the lower side in the lamp chamber 5. As the actuator 14, a rotary solenoid in which a rotor is rotated with respect to a stator is used.

  The projection lens 9 is formed in a flat surface in which the front surface is convex and the rear surface faces rearward. The projection lens 9 has a function of inverting an image on the focal plane including the rear focal point and projecting it forward.

  The inner surface of the reflector 10 is formed as a reflecting surface 10a, and the reflecting surface 10a is formed in, for example, a substantially elliptic spherical surface except for the front end portion. The reflecting surface 10 a is formed so that the first focal point coincides with a light emitting unit (to be described later) of the light source 11 and the second focal point coincides with the rear focal point of the projection lens 9.

  The light source 11 is, for example, a discharge bulb, and emits light from a light emitting unit 16 provided inside the outer tube 15. The outer tube 15 is held by a base part 17 arranged behind the outer pipe 15, and the base part 17 is coupled to a valve socket 18 arranged behind the base part 15.

  A lighting circuit unit (not shown) is disposed at the lower end of the lamp chamber 5, and the lighting circuit unit is positioned below the actuator 14. The valve socket 18 is connected to the lighting circuit unit by a power supply cord 19. Accordingly, a driving voltage is applied to the light source 11 through the power supply cord 19 by driving the lighting circuit unit, and light is emitted from the light emitting unit 16. The light emitted from the light emitting unit 16 travels forward or is reflected by the reflecting surface 10a of the reflector 10, is condensed on a focal plane including the rear focal point of the projection lens 9, and is projected forward by the projection lens 9 as illumination light. Projected.

  A shade 20 is rotatably supported between the projection lens 9 and the light source 11 inside the lamp unit 7. The shade 20 and the actuator 14 are components of the beam switching device 21.

  The actuator 14 is configured by arranging required parts inside the body 22 (see FIGS. 2 and 3).

  As shown in FIG. 2, the body 22 is formed by combining a box-shaped case body 22a opened on one side and a cover 22b that closes the opening of the case body 22a. A shaft support hole (not shown) is formed in each of the case main body 22a and the cover 22b.

  Inside the body 22, for example, a pair of permanent magnets 23, 23 are arranged apart from each other in the front-rear direction, and a stator 24 is configured by the permanent magnets 23, 23 (see FIGS. 2 and 3). The permanent magnets 23 and 23 are fixed inside the case body 22a, one permanent magnet 23 is magnetized to the N pole, and the other permanent magnet 23 is magnetized to the S pole. The permanent magnets 23 are formed in a substantially arc shape having a concave surface in a direction facing each other.

  The permanent magnets 23 and 23 are provided with restricting protrusions 23a and 23a that protrude in directions facing each other.

  A rotor 25 is disposed inside the stator 24 in a rotatable state.

  The rotor 25 has a core 26, bobbins 27, 28 and drive coils 29, 29, 29. An output shaft 30 and a connecting body 31 are attached to the rotor 25.

  Each part of the core 26 is integrally formed of a magnetic metal material, and a cylindrical shaft portion 26a, coil winding portions 26b, 26b, 26b projecting radially from the outer peripheral surface of the shaft portion 26a, and the coil winding. It consists of magnetic force generation parts 26c, 26c, and 26c that are provided at the distal ends of the parts 26b, 26b, and 26b and project so as to extend in the circumferential direction.

  The bobbin 27 is made of, for example, a resin material, and has a substantially cylindrical tube portion 32 extending in the left-right direction, winding portions 33, 33, 33 that protrude radially from the outer peripheral surface of the tube portion 32, and the winding It comprises projecting portions 34, 34, 34 provided at the respective distal ends of the turning portions 33, 33, 33 and projecting so as to extend in the circumferential direction.

  The cylindrical portion 32 includes a large diameter portion 32a and a small diameter portion 32b having an outer diameter smaller than that of the large diameter portion 32a. The end of the large diameter portion 32a opposite to the small diameter portion 32b is the coil winding portion 33, 33. 33. Insertion cutouts 32c and 32d opened to the small diameter portion 32b are formed at the upper end portion and the lower end portion of the large diameter portion 32a, respectively.

  One protrusion 34 of the bobbin 27 is provided with a regulated protrusion 34a that protrudes laterally.

  The bobbin 27 has a cylindrical portion 32, winding portions 33, 33, 33 and protrusions 34, 34, 34 superimposed on a shaft portion 26a, coil winding portions 26b, 26b, 26b, and magnetic force generating portions 26c, 26c, 26c, respectively. In this state, for example, it is fixed to one side surface of the core 26 by adhesion or the like.

  The bobbin 28 is made of, for example, a resin material, and has a substantially cylindrical tube portion 35 extending in the left-right direction, winding portions 36, 36, 36 that protrude radially from the outer peripheral surface of the tube portion 35, and the winding It comprises projecting portions 37, 37, 37 that are provided at the tip portions of the turning portions 36, 36, 36, respectively, and project so as to extend in the circumferential direction.

  One end portion of the cylindrical portion 35 in the axial direction is continuous with the coil winding portions 36, 36, 36.

  In the bobbin 28, the cylindrical portion 35, the winding portions 36, 36, 36 and the projections 37, 37, 37 are superimposed on the shaft portion 26a, the coil winding portions 26b, 26b, 26b, and the magnetic force generation portions 26c, 26c, 26c, respectively. In this state, it is fixed to the other side surface of the core 26 by, for example, adhesion.

  The drive coils 29, 29, and 29 are respectively wound around the outer peripheral surfaces of the coil 26 that overlap the coil winding portions 26 a, 26 a, 26 a of the core 26 and the winding portions 33, 33, 33, 36, 36, 36 of the bobbins 27, 28. Arranged. The drive coils 29, 29, 29 have at least one winding direction opposite to the other winding directions. For example, the winding directions of the two drive coils 29, 29 are clockwise and the other The winding direction of one drive coil 29 is the counterclockwise direction.

  The rotor 25 configured as described above is biased in one rotational direction in the shaft portion 26a of the core 26 by a biasing spring (not shown).

  The output shaft 30 passes through the cylindrical portion 32 of the bobbin 27, the axial portion 26a of the core 26, and the cylindrical portion 35 of the bobbin 28, and is fixed to the core 26 by press-fitting or bonding. The output shaft 30 is inserted into shaft support holes formed in the case main body portion 22 a and the cover portion 22 b of the body 22, and is rotatably supported by the body 22. Therefore, the rotor 25 can rotate in the direction around the axis of the output shaft 30 with respect to the body 22.

  A part of the output shaft 30 protrudes laterally from the body 22, and the protruding portion and the shade 20 are connected by a connecting member (not shown). Therefore, when the output shaft 30 is rotated integrally with the rotor 25 in the direction around the axis, the shade 20 is rotated in a direction corresponding to the rotation direction.

  The connection body 31 includes a first connection member 38 and a second connection member 39 (see FIGS. 3 and 4).

  The first connecting member 38 includes a cylindrical first connecting portion 38a, an arcuate surface-like protruding portion 38b protruding sideways from a part of the first connecting portion 38a, and outwardly from the protruding portion 38b. The coil connecting portion 38c protrudes.

  The second connecting member 39 includes an arc-shaped second connecting portion 39a, an arc-shaped projecting portion 39b projecting laterally from a part of the second connecting portion 39a, and an outer side from the projecting portion 39b. The coil connection portion 39c protrudes to the end, and has an arrangement cutout 39d between the end faces in the circumferential direction of the second connection portion 39a.

  As shown in FIG. 4, the first connection member 38 has a first connection portion 38a and a protruding portion 38b that are externally fitted and fixed to the small diameter portion 32b of the cylindrical portion 32 of the bobbin 27. The portion is inserted and fixed in the insertion notch 32c of the large diameter portion 32a.

  The second connecting member 39 has a second connecting portion 39a and a protruding portion 39b fixed by being fitted onto the small diameter portion 32b of the cylindrical portion 32 of the bobbin 27, and a part of the coil connecting portion 39c is inserted into the large diameter portion 32a. It is inserted into the notch 32d and fixed. At this time, a part of the protruding portion 38 b of the first connection member 38 is disposed in the disposition notch 39 d of the second connection member 39.

  The first connecting member 38 and the second connecting member 39 fixed to the bobbin 27 are not in contact with each other, and the first connecting portion 38 a and the second connecting portion 38 b are connected to the cylindrical portion 32. They are spaced apart in the axial direction.

  In a state where the first connection member 38 and the second connection member 39 are fixed to the bobbin 27 as described above, each end of the drive coils 29, 29, 29 is connected to the coil connection portion 38 c of the first connection member 38. The other end portions of the drive coils 29, 29, and 29 are wound and connected to the coil connection portion 39 c of the second connection member 39.

  As shown in FIGS. 2 and 3, brushes 40, 40 connected to a pair of terminal portions (not shown) provided on the outer surface side of the body 22 are opposite to each other by 180 ° across the output shaft 30. The brushes 40 and 40 are disposed on the side and have connection surfaces 40a and 40a facing each other with the output shaft 30 interposed therebetween. The pair of terminal portions are connected to a power supply circuit (not shown).

  The first connection portion 38 a of the first connection member 38 is slidably connected to the connection surface 40 a of one brush 40, and the second connection portion 39 a of the second connection member 39 is connected to the other brush 40. The connection surface 40a is slidably connected.

  In the actuator (rotary solenoid) 14 configured as described above, when the drive current is not supplied from the power supply circuit to the drive coils 29, 29, 29, the rotor 25 biased by the biasing spring is moved in one direction. The rotational force is applied. Accordingly, the rotor 25 is positioned at the rotating end in one direction (see FIG. 5), and the shade 20 is positioned at one rotating end and is in a low beam state (the state of the solid line in FIG. 1).

  At this time, the shade 20 is in contact with a stopper (not shown) and is positioned at one rotation end, and the regulated protrusion 34a of the rotor 25 is positioned in the vicinity of the one regulated protrusion 23a of the permanent magnet 23 ( (See FIG. 5). Therefore, even if a rotational force in one direction is applied to the rotor 25 due to vibration or the like during traveling of the vehicle, the regulated projection 34a of the rotor 25 can be brought into contact with the one regulation projection 23a of the permanent magnet 23. Therefore, the rotation of the rotor 25 more than necessary can be restricted.

  On the other hand, in the actuator 14, when a drive current is supplied from the power supply circuit to the drive coils 29, 29, 29 through the first connection member 38 and the second connection member 39, the relationship between the magnetic force of the stator 24 and the rotor 25. Thus, a rotational force in the other direction is applied to the rotor 25. Accordingly, the rotor 25 is rotated to the rotation end in the other direction (see FIG. 6), and the shade 20 is positioned at the other rotation end to be in a high beam state (the state of the two-dot chain line in FIG. 1).

  At this time, the shade 20 is in contact with a stopper (not shown) and positioned at the other rotation end, and the regulated protrusion 34a of the rotor 25 is positioned in the vicinity of the other regulated protrusion 23a of the permanent magnet 23 ( (See FIG. 6). Therefore, even if a rotational force in the other direction is applied to the rotor 25 due to vibration or the like during traveling of the vehicle, the regulated protrusion 34a of the rotor 25 can come into contact with the other regulated protrusion 23a of the permanent magnet 23. Therefore, the rotation of the rotor 25 more than necessary can be restricted.

  When the supply of drive current from the power supply circuit to the drive coils 29, 29, 29 is stopped, the rotor 25 is rotated to the rotation end in one direction by the urging force of the urging spring, and the shade 20 is moved to one rotation end. In the low beam state (solid line state in FIG. 1).

  As described above, in the vehicle headlamp 1, the rotary solenoid having the rotor 25 that is rotated inside the stator 24 is used as the actuator 14, so that the operating space of the operating portion (rotor) is small. It is small and can be miniaturized.

  In addition, the driving force does not decrease in inverse proportion to the moving stroke as in the case of a linear solenoid, and a small actuator 14 can be used, and further miniaturization can be achieved.

  Further, since rectification is not performed unlike the drive motor, radio noise due to rectification and hunting do not occur, and the operation reliability can be improved.

  Furthermore, in the connection body 31, the first connection portion 38 a of the first connection member 38 and the second connection portion 39 a of the second connection member 39 are spaced apart in the axial direction of the output shaft 30. Short circuit can be surely prevented.

  Moreover, in the actuator 14, since the connection surfaces 40a and 40a of a pair of brush 40 and 40 are located facing, the brushes 40 and 40 and the terminal part provided in the outer surface side of the body 22 are connected. Therefore, it is possible to easily perform the wiring work of the connecting cords.

  In addition, the connection body 31 is constituted by the first connection member 38 and the second connection member 39, and the protruding portion 38 b of the first connection member 38 is provided in the arrangement notch 39 d formed in the second connection member 39. Since it arrange | positions, the arrangement space of the connection body 31 can be made small and size reduction of the actuator 14 can be achieved.

  The shapes and structures of the respective parts shown in the best mode for carrying out the invention described above are merely examples of the embodiments performed in practicing the present invention. The range should not be interpreted in a limited way.

FIGS. 2 to 6 show the best mode of the actuator and the beam switching device for a vehicle headlamp according to the present invention, and this figure is a schematic longitudinal sectional view of the vehicle headlamp. It is an expansion perspective view of an actuator. It is an expansion disassembled perspective view which shows the internal structure of an actuator. It is an expansion perspective view which shows a bobbin, a 1st connection member, and a 2nd connection member. It is an enlarged side view which shows the position of the rotor in the state which is not supplying with electricity to a drive coil, making a part a cross section. It is an enlarged side view which shows the position of the rotor in the state by which the drive coil was supplied with electricity in the cross section.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle headlamp, 2 ... Lamp housing, 3 ... Cover, 4 ... Lamp housing, 7 ... Lamp unit, 9 ... Projection lens, 10 ... Reflector, 11 ... Light source, 14 ... Actuator, 21 ... Shade, 22 DESCRIPTION OF SYMBOLS ... Body, 23 ... Permanent magnet, 23a ... Restriction protrusion, 24 ... Stator, 25 ... Rotor, 26a ... Shaft part, 26b ... Coil winding part, 29 ... Drive coil, 30 ... Output shaft, 31 ... Connection body, 34a ... regulated protrusion, 38 ... first connection member, 38a ... first connection part, 38c ... coil connection part, 39 ... second connection member, 39a ... second connection part, 39c ... coil connection part, 39d: Arrangement cutout, 40 ... Brush, 40a ... Connection surface, 100 ... Beam switching device

Claims (4)

A stator composed of a pair of permanent magnets;
Driving the winding direction of the wound each winding shaft portion becomes the center of rotation from the shaft portion to the plurality of coil winding portions and a plurality of coil winding part which projects into the radial directions at least one drive coil other A rotor having a plurality of drive coils reversed with respect to the winding direction of the coil and rotated around the shaft portion inside the stator;
A body in which the stator and the rotor are disposed;
An output shaft attached to the shaft portion of the rotor and rotatably supported by the body and partially protruding from the body;
A connection body having a pair of coil connection portions that are rotated integrally with the rotor and connected to the first connection portion, the second connection portion, and both ends of the drive coil;
A pair of brushes having a connection surface fixed to the body and connectable to the first connection portion and the second connection portion, respectively .
The pair of brushes is connected only to the first connection part so that rectification does not occur, and the other brush is connected only to the second connection part,
The first connection portion and the second connection portion of the connection body are arranged apart from each other in the axial direction of the output shaft;
Provide a regulated protrusion on the rotor,
A rotary solenoid characterized in that a restriction protrusion that restricts rotation of the rotor is provided on the stator so as to be in contact with the restriction protrusion . The rotary solenoid according to claim 1, wherein the connection surfaces of the pair of brushes are positioned to face each other . The connection body is constituted by a first connection member having the first connection portion and a second connection member having the second connection portion,
Forming a disposition notch in the second connecting member;
3. The rotary solenoid according to claim 1 , wherein a part of the first connection member is arranged in a notch for arranging the second connection member . A part of the light emitted from the light source disposed inside the lamp outer casing and disposed inside the lamp outer casing constituted by a lamp housing opened in one side and a cover closing the opening of the lamp housing A beam switching device for a vehicle headlamp that switches the irradiation range of light emitted from the light source by moving a shade that can be shielded and moved in a predetermined direction by a driving force of an actuator,
The actuator is
A stator composed of a pair of permanent magnets;
Driving the winding direction of the wound each winding shaft portion becomes the center of rotation from the shaft portion to the plurality of coil winding portions and a plurality of coil winding part which projects into the radial directions at least one drive coil other A rotor having a plurality of drive coils reversed with respect to the winding direction of the coil and rotated around the shaft portion inside the stator;
A body in which the stator and the rotor are disposed;
An output shaft attached to the shaft portion of the rotor and rotatably supported by the body and partially protruding from the body;
A connection body having a pair of coil connection portions that are rotated integrally with the rotor and connected to the first connection portion, the second connection portion, and both ends of the drive coil;
A pair of brushes having a connection surface fixed to the body and connectable to the first connection portion and the second connection portion, respectively .
The pair of brushes is connected only to the first connection part so that rectification does not occur, and the other brush is connected only to the second connection part,
The first connection portion and the second connection portion of the connection body are arranged apart from each other in the axial direction of the output shaft;
Provide a regulated protrusion on the rotor,
A beam switching device for a vehicular headlamp, wherein the stator is provided with a regulating projection that is capable of contacting the regulated projection and regulates the rotation of the rotor .

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