EP2442017A1 - Fahrzeugscheinwerfer mit einer magnetbetätigten Blende - Google Patents

Fahrzeugscheinwerfer mit einer magnetbetätigten Blende Download PDF

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Publication number
EP2442017A1
EP2442017A1 EP11178928A EP11178928A EP2442017A1 EP 2442017 A1 EP2442017 A1 EP 2442017A1 EP 11178928 A EP11178928 A EP 11178928A EP 11178928 A EP11178928 A EP 11178928A EP 2442017 A1 EP2442017 A1 EP 2442017A1
Authority
EP
European Patent Office
Prior art keywords
rotor
headlight
stator
screen
solenoid actuator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP11178928A
Other languages
English (en)
French (fr)
Other versions
EP2442017B1 (de
Inventor
Gerardo Maino
Marilinda Sala
Ruggero Manzotti
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mes SA
Original Assignee
Mes SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mes SA filed Critical Mes SA
Publication of EP2442017A1 publication Critical patent/EP2442017A1/de
Application granted granted Critical
Publication of EP2442017B1 publication Critical patent/EP2442017B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/68—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens
    • F21S41/683—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens by moving screens
    • F21S41/689—Flaps, i.e. screens pivoting around one of their edges

Definitions

  • the present patent application relates to a headlight for cars and motor vehicles provided with a partial dimming screen, actuated by means of a solenoid actuator.
  • DE 100 51 833 discloses a motor vehicle head lamp with mobile screen for high and low beam settings, using motor with air coupling to activate the screen that returns to rest position under the influence of spring or counterweight.
  • FR 2868507 discloses an headlight device for motor vehicles, provided with case and support units to maintain a rod of a support part of a swiveling shutter, so that motor and shutter axes are parallel and a toothed wheel and terminal pinion of the motor constitute a gear.
  • DE102004025228 discloses a headlight for vehicles provided with electrical actuator having a spool as stator and a spring unit for adjustment of rotor and aperture shaft in three predetermined rotary positions around the same angle of rotation, i.e. acute angle.
  • W02008/035385 discloses a vehicle head lamp, wherein the screen is actuated by a solenoid actuator comprising an internal rotor that rotates inside an external fixed stator. Nevertheless, the head lamp disclosed in W02008/035385 is impaired by the complex fixing of the screen to the shaft of the rotor.
  • the purpose of the present invention is to eliminate the inconveniences of the prior art by disclosing a vehicle head lamp with screen actuated by means of solenoid that is reliable, resistant, efficient, inexpensive and simple to make and install.
  • the vehicle head lamp according to the invention comprises:
  • the solenoid actuator can be actuated by the vehicle's driver by means of a specific control to cause the rotation of said rotating screen.
  • the rotor of the solenoid actuator is revolvingly mounted around said stator in such a way that the stator is inside the rotor.
  • Said configuration allows for safer and more reliable mounting of the screen on the rotor that is situated in external position on the stator.
  • said configuration allows for avoiding the use of return springs to bring the rotor back to the initial position.
  • the headlight for vehicles of the invention is described, being generally indicated with reference numeral (1).
  • the headlight (1) comprises a single lamp (2) with wattage comparable with traditional high beam lamps.
  • the lamp (2) is fitted into a traditional support and power supply assembly (20).
  • a reflecting body (21) is disposed around the lamp (2) to convey the light emitted by the lamp (2) into a preferential direction.
  • the reflecting body (21) is fixed to the power supply support (20) by means of a ring (22).
  • two brackets (23) are mounted to fix the headlight to the chassis of the vehicle and adjust the inclination of the luminous beam emitted by the lamp.
  • a flange (3) is mounted on the front border of the reflecting body (21).
  • the flange (3) (see also Fig. 5 ) is composed of a rectangular frame that defines a central opening (30) for passage of light.
  • a solenoid actuator (4) is supported by the flange (3).
  • the solenoid actuator (4) actuates a screen (9) that partially covers the opening (30) of the flange in such a way to screen part of the luminous beam coming from the lamp (2).
  • the screen (9) can go from closed position ( Fig. 6 ) to open position ( Fig. 7 ).
  • closed position When the screen (9) is in closed position, it interferes with the luminous beam emitted by the lamp (2), thus generating a dipped light.
  • open position instead, when the screen (9) is in open position, it does not interfere with the luminous beam emitted by the lamp (2), thus generating a high beam.
  • An electrical cable (40) is connected to the solenoid actuator (4) and protrudes from the headlight (1) to power and operate the solenoid actuator.
  • a front mask (24) is fixed to the reflecting body (21) in order to lock the flange (3) firmly.
  • a transparent body (25), such as glass, is mounted on the mask (24) in order to protect the inside of the headlight.
  • the solenoid actuator (4) comprises an internal stator (5) and an external rotor (6) revolvingly mounted around the stator (5).
  • the internal stator (5) is fixed to the flange (3). Instead, the screen (9) is fixed on the external rotor (6).
  • the stator (5) comprises a shaft (50) provided with first end (51) and second end (52) supported in corresponding supports (31, 32) of the flange (3).
  • the shaft (5) of the stator is fixed to the flange (3), for example by means of splining, in such a way to prevent rotation with respect to the flange (3).
  • a pack of plates with winding (53) of the stator is mounted on the shaft (50).
  • the winding (53) of the stator is made of two parts, using high-temperature resistant copper wire in order to guarantee electrical insulation of the stator (5).
  • the rotor (6) is made of an internally empty cylindrical body (60). From the external surface of the cylinder (60) of the rotor two wings (61) protrude radially outwards, being fixed to the screen (9) so that the screen (9) forms a plane that protrudes radially outwards from the cylinder (60) of the rotor.
  • the wings (61) of the cylinder of the rotor are fixed in a central portion of the screen (9).
  • the wings (61) are welded to the screen (9).
  • the screen (9) consists in a basically rectangular plate and can advantageously have a predominantly U-shaped configuration with two wings (90, 91) extending in the vicinity of the two lateral borders of the rotor (6) to screen the light near the sides of the rotor.
  • each magnetic element (7) is shaped as arc of a circle, in cross-sectional view, with subtended angle of approximately 90° - 120°.
  • the stator (5) is inserted into the rotor (6), in such a way that a toroidal air space (T) known as 'air gap' is generated between the external surface of the pack of plates (53) ( Figs. 6 and 7 ).
  • T toroidal air space
  • a head (8) On a lateral border of the cylinder (60) of the rotor, a head (8) is mounted (8), being basically shaped as a disc with central shank (80).
  • Two stop means (81, 82) are provided on the peripheral part of the head (8) in such a way to protrude outwards.
  • the stop means (81, 82) act as stops when they come in contact with a stop surface obtained in the flange (3).
  • the stop means (81, 82) define the rotation travel of the rotor (6) from the closed position of the screen (9) ( Fig. 6 ) to the open position of the screen (9) ( Fig. 7 ).
  • an axial shank (65) is provided, wherein a first bush revolvingly supported in the fixed shaft (50) of the stator is obtained.
  • the head (8) is provided, inside the shank (80), with a second bush that is revolvingly supported on the fixed shaft (50) of the stator. So, the two ends of the rotor (6) are revolvingly supported by the fixed shaft (50) of the stator.
  • a helicoidal spring (M) is disposed around the shank (80) of the head of the rotor.
  • the spring (M) is provided with first end (M1) engaged in the head (8) and second end (M2) engaged in the flange (3).
  • the spring (M) is suitably pre-loaded in such a way that when the screen (9) is in open position (high beam), the spring (M) generates a return force that tends to bring the rotor (6) back to the initial position with screen closed (dipped lights).
  • the screen (9) In the initial position the screen (9) is closed (dipped lights).
  • the actuation of a high beam activation control by the vehicle's driver determines, in an instantaneous sequence, the passage of current in the windings (53) of the stator (5), the electrical excitation of the solenoid actuator (4), the forward rotation of the cylinder of the rotor (6) and the downward-forward overturning of the screen (9) fixed to the rotor (up to the specific position shown in Fig. 7 ).
  • the actuation of a high beam deactivation control by the vehicle's driver determines, in an instantaneous sequence, the passage of current in the windings (53) of the stator (5), the electrical de-excitation of the solenoid actuator (4), the backward rotation of the cylinder of the rotor (6) and the upward movement of the screen (9) fixed to the rotor (up to the specific position shown in Fig. 6 ), with the cooperation of the spring (M).
  • the spring (M) can be omitted.
  • the solenoid actuator (4) of the invention uses the magnetic effect between the magnetic elements (7) disposed inside the cylinder of the rotor (6) and the external flange (3).
  • the flange (3) is made of magnetic sheet metal. So, the spring (M) can be omitted.
  • the magnetic elements (7) disposed in the cylinder of the rotor are suitably directed with respect to the magnetic field generated by the winding (53) of the stator crossed by current. So, it is necessary to define the relative position of the magnetic elements (7) disposed inside the rotor with respect to the flange (3).
  • Figs. 8 and 9 illustrate a battery of the vehicle (V) providing electrical power, the winding (53) of the stator of the solenoid actuator and a switch (T) consisting in a controlled switch that can be switched between two positions:
  • the switch (T) short-circuits the winding (53) ( Fig. 8 ) in such a way to generate current recirculation with braking effect on the return speed of the rotor to the initial position.
  • Such current recirculation in the winding (53) obtained by short-circuiting the winding (53) acts as brake for the motion of the rotor and avoids undesired oscillations of the rotor.
  • the pre-loaded spring eliminates the effect of undesired movements of the screen (9) during the return of the device to the initial position.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
EP11178928.5A 2010-10-18 2011-08-25 Fahrzeugscheinwerfer mit einer magnetbetätigten Blende Active EP2442017B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITAN2010A000181A IT1401790B1 (it) 2010-10-18 2010-10-18 Faro per veicoli dotato di schermo azionato mediante solenoide.

Publications (2)

Publication Number Publication Date
EP2442017A1 true EP2442017A1 (de) 2012-04-18
EP2442017B1 EP2442017B1 (de) 2014-12-17

Family

ID=43737777

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11178928.5A Active EP2442017B1 (de) 2010-10-18 2011-08-25 Fahrzeugscheinwerfer mit einer magnetbetätigten Blende

Country Status (2)

Country Link
EP (1) EP2442017B1 (de)
IT (1) IT1401790B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150292702A1 (en) * 2012-09-07 2015-10-15 Shanghai Koito Automotive Lamp Co., Ltd. Rotary Electromagnetic Actuator and Car Lamp Low Beam and High Beam Light Switching Device Thereof
EP2966345A1 (de) * 2014-07-09 2016-01-13 AML Systems Blendenmechanismus, der eine tragleiste und einen permanentmagneten umfasst
US20170114977A1 (en) * 2015-03-04 2017-04-27 Shanghai Koito Automotive Lamp Co., Ltd. Rotary Electromagnetic Actuator and Car Lamp Low Beam and High Beam Light Switching Device

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001143505A (ja) * 1999-11-12 2001-05-25 Stanley Electric Co Ltd 車両用前照灯
JP2002056707A (ja) * 2000-08-07 2002-02-22 Ichikoh Ind Ltd 車両用ヘッドランプ装置
DE10051833A1 (de) 2000-10-19 2002-05-08 Bosch Gmbh Robert Planares Gassensorelement
DE10334553A1 (de) * 2003-07-30 2005-06-16 Hella Kgaa Hueck & Co. Scheinwerfer für Fahrzeuge
FR2868507A1 (fr) 2004-04-02 2005-10-07 Valeo Vision Sa Dispositif projecteur avec mecanisme de volet pivotant
DE102004025228A1 (de) 2004-05-22 2005-12-08 Hella Kgaa Hueck & Co. Scheinwerfer für Fahrzeuge
EP1764550A1 (de) * 2005-09-20 2007-03-21 Valeo Vision Scheinwerfer mit einer mittels einem zurückziehbaren Anschlag in zwei Betriebsmodus steuerbaren Blende
WO2008035385A2 (en) 2006-09-20 2008-03-27 Mes S.A. Vehicle head lamp provided with partial dimming screen
US20090190368A1 (en) * 2007-12-27 2009-07-30 Petr Smajser Projector unit

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001143505A (ja) * 1999-11-12 2001-05-25 Stanley Electric Co Ltd 車両用前照灯
JP2002056707A (ja) * 2000-08-07 2002-02-22 Ichikoh Ind Ltd 車両用ヘッドランプ装置
DE10051833A1 (de) 2000-10-19 2002-05-08 Bosch Gmbh Robert Planares Gassensorelement
DE10334553A1 (de) * 2003-07-30 2005-06-16 Hella Kgaa Hueck & Co. Scheinwerfer für Fahrzeuge
FR2868507A1 (fr) 2004-04-02 2005-10-07 Valeo Vision Sa Dispositif projecteur avec mecanisme de volet pivotant
DE102004025228A1 (de) 2004-05-22 2005-12-08 Hella Kgaa Hueck & Co. Scheinwerfer für Fahrzeuge
EP1764550A1 (de) * 2005-09-20 2007-03-21 Valeo Vision Scheinwerfer mit einer mittels einem zurückziehbaren Anschlag in zwei Betriebsmodus steuerbaren Blende
WO2008035385A2 (en) 2006-09-20 2008-03-27 Mes S.A. Vehicle head lamp provided with partial dimming screen
US20090190368A1 (en) * 2007-12-27 2009-07-30 Petr Smajser Projector unit

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150292702A1 (en) * 2012-09-07 2015-10-15 Shanghai Koito Automotive Lamp Co., Ltd. Rotary Electromagnetic Actuator and Car Lamp Low Beam and High Beam Light Switching Device Thereof
EP2894064A4 (de) * 2012-09-07 2016-05-25 Shanghai Koito Automotive Lamp Elektromagnetischer drehbetätigungsmechanismus sowie ober- und unterstrahlumschaltung eines fahrzeugscheinwerfers dafür
EP2966345A1 (de) * 2014-07-09 2016-01-13 AML Systems Blendenmechanismus, der eine tragleiste und einen permanentmagneten umfasst
FR3023602A1 (fr) * 2014-07-09 2016-01-15 Aml Systems Mecanisme de coupure comportant une barrette porteuse d'un aimant permanent.
CN105261441A (zh) * 2014-07-09 2016-01-20 Aml系统公司 包括承载有永磁体的杆的截挡机构
US10180225B2 (en) 2014-07-09 2019-01-15 Aml Systems Cutoff mechanism comprising a bar carrying a permanent magnet
CN105261441B (zh) * 2014-07-09 2019-01-18 Aml系统公司 包括承载有永磁体的杆的截挡机构
US20170114977A1 (en) * 2015-03-04 2017-04-27 Shanghai Koito Automotive Lamp Co., Ltd. Rotary Electromagnetic Actuator and Car Lamp Low Beam and High Beam Light Switching Device
US10386034B2 (en) * 2015-03-04 2019-08-20 Hasco Vision Technology Co., Ltd. Rotary electromagnetic actuator and car lamp low beam and high beam light switching device

Also Published As

Publication number Publication date
IT1401790B1 (it) 2013-08-28
EP2442017B1 (de) 2014-12-17
ITAN20100181A1 (it) 2012-04-19

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