WO2022090271A1 - Ensemble de fixation pour moyen de réglage de visée de lampe de véhicule - Google Patents

Ensemble de fixation pour moyen de réglage de visée de lampe de véhicule Download PDF

Info

Publication number
WO2022090271A1
WO2022090271A1 PCT/EP2021/079742 EP2021079742W WO2022090271A1 WO 2022090271 A1 WO2022090271 A1 WO 2022090271A1 EP 2021079742 W EP2021079742 W EP 2021079742W WO 2022090271 A1 WO2022090271 A1 WO 2022090271A1
Authority
WO
WIPO (PCT)
Prior art keywords
fastening assembly
screw
housing
metal connector
vehicle lamp
Prior art date
Application number
PCT/EP2021/079742
Other languages
English (en)
Inventor
Juan Antonio Rubia Mena
Ramon FUENTES HERNANDEZ
Luis-Antonio SANCHEZ
Maria Esther PALOP DEL RIO
Original Assignee
Valeo Vision
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 Valeo Vision filed Critical Valeo Vision
Publication of WO2022090271A1 publication Critical patent/WO2022090271A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
    • B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
    • B60Q1/06—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely-controlled from inside vehicle
    • B60Q1/068—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely-controlled from inside vehicle by mechanical means
    • B60Q1/0683—Adjustable by rotation of a screw
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2200/00—Special features or arrangements of vehicle headlamps
    • B60Q2200/30—Special arrangements for adjusting headlamps, e.g. means for transmitting the movements for adjusting the lamps
    • B60Q2200/32—Ball-joints

Definitions

  • the present invention relates to a fastening assembly for adjusting an aiming adjuster for a vehicle lamp and more particularly to fastening assembly for an aiming adjuster providing high precision adjustment for automotive vehicle headlamp.
  • Lighting devices are used in automobiles and the like, for lighting the path ahead. These lighting devices need to be oriented properly to provide adequate lighting to the driver of the automobile under various driving conditions and at the same time avoid dazzling vehicles coming from opposite direction.
  • optical modules of lighting devices are assembled to a housing of a lighting device by means of connection points, and the optical module is movable relative to the housing to correct the orientation.
  • the housing is usually made of plastic, for instance a polycarbonate thermoplastic.
  • optical axis adjusters are provided. Based on the level of performance required and sometimes due to cost various types of optical axis adjusters provided. We can broadly classify them as non-precision adjusters and precision adjusters. Nonprecision adjusters are composed of a screw having a spherical joint, a thread and sealing O-ring. These are screwed directly over the headlamp housing. This solution provided adjustment level that are enough for halogen lighting systems and not for LED based lighting system. In Precision adjuster, increase in precision is obtained by reducing thread pitch of the adjuster. This decreases the axial force that the system is able to stand, as there is less material engaged between two thread profiles.
  • An objective of the present invention is to provide a fastening assembly for adjusting an aiming adjuster of a vehicle lamp, which over comes the above mention disadvantages. More particularly the present invention provides a fastening assembly for adjusting an aiming adjuster adapted to be mounted on a housing and capable of providing precision adjustment of the aiming adjuster.
  • a fastening assembly adapted to be mounted on a housing, for adjusting an aiming adjuster of a vehicle lamp
  • the fastening assembly comprises a screw having a threaded portion; and a nut member comprising an insert having a thorough passage and a metal connector to assemble over the insert, wherein the metal connector engages with the housing and the screw.
  • the fastening assembly of the present invention is easier to assemble and does not require complicate tools to mount on the housing of the vehicle lamp.
  • the fastening assembly is capable of standing high axial force under automotive thermal and vibration environments. Further, the fastening assembly is compact and is cheaper to manufacture as it relies on only one metal part.
  • the metal connector is obtained from a metal sheet.
  • the use of sheet metal for making the metal connector reduces the overall cost and provides ease of manufacture. Further, the metal connector made of sheet metal may be compact and may provide relative flexibility during assembly. In addition, when the metal connector is obtained from a metal sheet, it stands high axial force under automotive thermal and vibration environments.
  • the metal connector includes at least one tooth to engage with a housing of the vehicle lamp. The at least one tooth of the may be configured to engage with the housing to lock the metal connector with the housing and prevent disengagement , for instance disengagement due to high axial forces, or automotive thermal or vibration environments.
  • the metal connector comprises a connector base having a cut out portion and a plurality of side faces extending away from the connector base in axial direction of the nut member.
  • the plurality of side faces extending away from the connector base provides flexibility to the metal connector. This further enables easy assembly of the metal connector to the housing.
  • At least one tooth may be provided on the side faces on the end farther from the connector base.
  • the metal connector may be locked to the housing in a buttress lock.
  • a buttress lock is a locking arrangement which makes it is easy to insert the nut assembly in the housing, and difficult to pull it out.
  • a buttress lock may be formed by a lever section that increases pressure on a friction contact when a pulling effort is increased on a lever- connected part.
  • the friction point is the at least one tooth on the side faces of the metal connector and is configured to lock with the housing in order to form the buttress lock.
  • the side faces form a lever of a buttress lock, pivoting around a folded joint with the connector base.
  • the at least one tooth locked to the housing may prevent disengagement during operation due to friction between the two parts, or high axial forces, or vehicle thermal or vibration environment.
  • several teeth are provided on the metal connector. Thereby, a friction resistance is increased, and a stability of the mounting of the fastening assembly in the housing of a vehicle lamp is enhanced.
  • several teeth may be configured to engage on all the available sides of the housing, thus preventing any misalignment during operation.
  • the teeth of the metal connector engage particularly well with a plastic housing, for instance a polycarbonate housing.
  • the metal connector includes at least one internal tab structure adapted to engage with the threaded portion of the screw when the screw is engaged with the nut member.
  • the at least one internal tab structure of the metal connector may be obtained through a blanking process to form the required profile in a sheet metal.
  • the profile of the internal tab structure and the elasticity provided by the sheet metal provide the internal tab structure with flexibility to adapt to the size of the screw. In addition, this also helps achieving assembly tolerances and managing thermal dilatation of the parts.
  • the metal connector includes a threaded portion adapted for engaging with the thread. This threaded portion may be obtained by stamp-pressing the metal sheet of the metal connector.
  • the at least one internal tab structure extends radially inwards from the inner surface of the cut out portion of the connector.
  • the internal tab structure extending inwards enables the tab structures to directly engage with the screw.
  • at least one tab structure may have a helicoidally shaped tip in order to engage with the thread, for instance the inner ends of the tab structures may have angled edges.
  • the internal tab structure may be flexible enough in order to allow tab structures without a helicoidally shaped tip to engage with the thread.
  • the tab structure may have an narrow and elongated shape for better flexibility, or a shorter and wider shape for more rigidity.
  • the metal connector comprises at least 3 tab structures, so as to enable a assembly of the metal connector with the screw by press fitting the screw in the connector.
  • the metal connector comprises at least 4 tab structures, so as to limit the effort when the screw is press fitted into the connector.
  • the metal connector comprises at least 6 tab structures, so that the screw can be press fitted using a hand press.
  • the connector comprises an aperture on each of the at least one of the side faces and wherein the insert comprises at least one locking stub adapted to engage with the aperture of the metal connector.
  • the locking stub when engaged with the aperture of the metal connector may lock the metal connector with the insert. This prevents disengagement of the metal connector and the insert.
  • the screw comprises a first end and second end, and wherein the threaded portion is between the first end and the second end.
  • the threaded portion may be configured to allow ease of operation for adjusting the orientation of the vehicle lamp.
  • the first end of the adjusting screw an end of the screw is adapted to form a ball joint with a lighting module of the vehicle lamp.
  • the ball joint may comprise a ball head provided at the end of the screw and a receptacle located on the lighting module.
  • the ball head is configured to mate with the receptacle such that the ball head is free to rotate inside the receptacle without disengaging.
  • the free rotation of the spherical end allows the lighting module to pivot and/or tilt relative to the spherical end.
  • the ball head may have at least one spherical portion.
  • the ball head may have pseudo-spherical portions, that is to say that the ball head has edge portions arranged in order to form a spherical envelope, in particular a plurality of edges forming such a spherical envelope.
  • the ball head is polyhedral.
  • a lighting module may be a module comprising at least one reflector and/or at least one lens.
  • a module contributes to regulatory lighting functions such as a low beam and/or a high beam function.
  • the insert comprises a flange.
  • the flange may be configured to connect with the housing of the vehicle lamp in order to maintain an angular positioning of the fastening assembly with respect to the housing; for instance, a planar joint connects the flange with the housing. Such a connection secures an angular stability of the fastening assembly with respect to the housing, which is essential for the optical adjustment function of the fastening assembly.
  • the fastening assembly comprises a gasket adapted to seal a space between the screw and the housing.
  • the gasket may be configured to prevent moisture, water and other foreign particles from entering the nut member and damaging the parts.
  • the insert is made of plastic, which is cheap to manufacture.
  • the plastic insert stabilizes the metal connector with the housing when assembled.
  • the insert's passage for the screw is smooth.
  • the smooth passage of the insert may provide less resistance to the movement of the screw inside the passage and enables easy and fast assembly of the screw, the insert and the connector.
  • a smooth passage is less costly to manufacture and contributes to stabilizing the screw.
  • the nut member is adapted to be press-fitted in the housing of the vehicle lamp.
  • the process of press fitting the nut member to the housing provides relative ease of assembly and does not require use of complicated tools. This may further enable increased assembly speed and efficiency.
  • the passage of the insert is smooth and when the metal connector includes a tab structure adapted to engaging with the thread of the screw, the elasticity of the tab structure allows for an assembly of the screw by press fitting, which is particularly economic and time efficient.
  • Figure 1 a shows a cut section of a fastening assembly for a non-precision adjuster of known art used for aiming vehicle lamp.
  • Figure 1 b shows a cut section of a fastening assembly of a precision adjuster of known art used for aiming vehicle lamp.
  • Figure 2 shows a perspective view of a fastening assembly for an aiming adjuster for a vehicle lamp according to an embodiment of the present invention.
  • Figure 3 shows an exploded view of a fastening assembly for an aiming adjuster along with a housing for a vehicle lamp according an embodiment of the present invention.
  • Figure 4 shows an exploded view of a nut member of the fastening assembly of figure 3 for an aiming adjuster of vehicle lamp.
  • Headlamps of automobiles are known to available with an optical axis adjustment system that include a tiltable member such as a lighting module assembled to a stationary member (e.g. mounting bracket) of the headlamp.
  • the optical axis adjustment system include an aiming adjuster, which are usually accessible by technician to enable and operate the aiming adjuster.
  • the aiming adjuster needs to provide aiming torque to enable precision aiming and needs to be robust in operation.
  • Figure 1 a shows a fastening assembly for an aiming adjusters used in halogen lighting system or in lighting system where high precision is not needed.
  • the fastening assembly is composed of a screw that includes a spherical joint, a thread with an ISO 724 metric thread profile and sealing gasket. They are directly screwed over the headlamp housing.
  • Figure 1 b shows another fastening assembly for an aiming adjuster of known art where there is need for high precision adjustment or for LED lighting system. In these aiming adjusters, the precision is improved by reducing the thread pitch of the adjusters.
  • a metal nut is provided in the aiming adjuster to withstand the axial force generated while operating. Further, the metal nut is configured to engage with a plastic nut during assembly.
  • a gasket adapted to seal a space between the screw 10 and the housing 50 may be provided to prevent entry of foreign particle inside the fastening assembly 100.
  • FIG 2 shows a fastening assembly 100 according to an embodiment of the present invention.
  • the fastening assembly 100 is adapted be mounted on a housing 50 for aiming a lighting module of a vehicle lamp.
  • the fastening assembly 100 comprises a screw 10 having a threaded portion 12 and a nut member 200 (see Figure 3).
  • the screw 10 comprises a first end 16 and second end 18, a threaded portion 12 may be provided between the first end 16 and the second end 18.
  • the threaded portion 12 may be configured enable the movement of the screw 10 relative to the housing 50, when an external action is initiated.
  • the threaded portion 12 on the screw 10 can be produced by either stamping or process such as tapping, milling or similar process.
  • the threads of the threaded portion 12 have a helicoidal thread profile.
  • the nut member 200 comprises of an insert 20 and a metal connector 30 engaged with the insert 20.
  • the metal connector 30 may include at least one tooth 38, the at least one tooth 38 may be adapted to engage with a housing 50 of the vehicle lamp.
  • the metal connector 30 comprises at least one internal tab structure 34 adapted to engage with the threaded portion 12 of the screw 10 when the screw 10 is threaded to the nut member 200.
  • the profile of the metal connector 30 is designed to match the profile of the insert 20 to be engage with the insert 20.
  • the metal connector 30 of the nut member 200 engages with the housing 50 and the screw 10.
  • the metal connector 30 engages with the housing 50 in a buttress lock, and the insert 20 stabilizes the metal connector 30 with regard to the housing.
  • the metal connector 30 comprises a connector base 301 having a cut out portion 302 and a plurality of side faces 32 extending away from the connector base 301 in axial direction of the nut member 200.
  • the connector base 301 and the side faces 32 forms an angle between them that essentially may be nonlinear, that is the angle between side faces 32 and connector base 301 rages between 1 degree and up to 180 degree, but may be configured such that the angle is not 0 degree or 180 degrees.
  • the side faces 32 comprises at least one tooth 38 which may be substantially perpendicular to the side faces 32 to engage with a housing 50 of the vehicle lamp.
  • the side faces 32 may form a cantilever beam arrangement by virtue of extending away from the connector base 301 of the metal connector 30.
  • the at least one tooth 38 on the side faces 32 may be on the end farther from the connector base 301 .
  • the cantilever beam arrangement of the side faces 32 provides flexibility to the metal connector 30.
  • the flexibility along with the provision of the at least one tooth 38 at the end farther from the connector base 301 may enable the above-mentioned buttress lock.
  • the screw 10 comprises a first end 16 and second end 18. Further, the threaded portion 12 of the screw 10 is provided between the first end 16 and the second end 18.
  • the first end 16 of the screw 10 has a ball joint 14 adapted to form a ball joint with a lighting module (not shown in Figures) of the vehicle lamp.
  • the ball joint 14 causes the lighting module to move relative to a pivot joint (not shown) due to the movement of the bolt 10 for adjusting the orientation of the vehicle lamp.
  • the at least one internal tab structure 34 of the metal connector 30 extends radially inwards from the inner surface of the cut out portion 302 of the metal connector 30 and are intended to engage with the threaded portion 12 of the bolt 10.
  • the internal tab structure 34 of the metal connector 30 may be configured to act as the only direct connection between the metal connector 30 and the bolt 10. The connection signifies that apart from the internal tab structure 34 of the metal connector 30 no other portion of the metal connector 30 may be in contact with the bolt 10.
  • the at least one internal tab structures 34 may be flexible and may be designed to be directly fixed on the threaded portion 12 of the bolt 10 during assembly and there is no need to screwing the assembly together.
  • the engagement of the at least one internal tab structure 34 with the threaded portion 12 of the screw 10 ensures that the aiming torque remains stable even after multiple thermal and vibration cycles.
  • the internal tab structures 34 moves on the threaded portion 12 following the thread profile when external action is initiated for adjusting on the screw 10.
  • the metal connector 30 may be provided with stamped threads (not shown) on the inner surface of the cut out portion 302. The stamped threads may be configured to engage with the thread portion 12 of the screw 10 when external action is initiated for adjusting on the screw 10.
  • the insert 20 includes a first end A and a second end B that is opposite to the first end A (refer Figure 4).
  • the insert 20 includes a thorough passage extending from the first end A to the second end B to receive the threaded portion 12 of the screw 10.
  • the through passage of the insert 20 preferably as per the embodiment of the invention is smooth and does not include threads. However, in an alternate embodiment threads may be provided in the passage of the insert 10 to engage with the threaded portion 12 of the screw 10.
  • the metal connector 30 comprises an aperture 36 on each of the side faces 32.
  • the insert 20 as per the preferred embodiment comprises a locking stub 24 adapted to engage with the aperture 36 of the connector 30.
  • the locking stub 24 is preferably provided near the second end B. Additionally; the insert 20 comprises a flange 22 on the first end A opposite to the locking stub 24. The at least one locking stub 24 of the insert 20 engages with the aperture 36 of the metal connector 30 and locks the assembly in place.
  • the metal connector 30 and the insert 20 are press fitted together to form the fastener assembly 100.
  • the insert comprises locking ribs 26; the ribs are adapted to engage with the housing 50 of the vehicle lamp.
  • the fastening assembly 100 comprises an gasket 40 assembled on the adjusting screw 10 near the second end 18 when the fastening assembly is assembled to the housing. The gasket is to make sure the assembly is watertight and no fluid enters the fattener assembly 100.
  • the metal connector 30 may be obtained from sheet metal in particular by performing blanking operation on a sheet metal to obtain the required profile.
  • the blanking operation may involve cutting the sheet metal in a punch and die.
  • the side faces 32, internal tab structure 34 and at least one tooth 38 of the metal connector 30 can be realized in one punching operation and one folding operation.
  • the resultant blank obtained from the blanking operation may be then folded in a die to create the nonlinear shape as discussed earlier.
  • the nut member 200 is adapted to be press fit in the housing 50 of the vehicle lamp.
  • the plurality of side faces 32 of the metal connector 30 creates a one-way locking assembly with the housing 50 of the vehicle lamp.
  • the at least one tooth 38 locks into the housing body due to friction when nut member 200 if engaged with the housing 50.
  • the metal connector 30 of the nut member 200 may be locked axially by friction thereby blocking any axial movement of the screw 10.
  • a clip can be moulded in a hollow hole of the housing by providing an undercut or step in the housing.
  • the insert 20 ensures an angular position of the screw and allows better engagement of screw member 10 compared to putting screw member directly into housing.
  • the insert 20 is made of plastic or other polymer based material as per the embodiment of the present invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

La présente invention concerne un ensemble (100) de fixation destiné à un moyen de réglage de visée prévu pour être monté sur un boîtier (50), pour régler un moyen de réglage de visée d'une lampe de véhicule, l'ensemble de fixation comportant une vis (10) dotée d'une partie filetée (12) et un élément (200) d'écrou comportant un insert (20) doté d'un passage traversant et d'un connecteur (30) en métal pour s'assembler par-dessus l'insert (20). Le connecteur (30) en métal comprend au moins une dent (38) destinée à interagir avec un boîtier (50) de la lampe de véhicule, et au moins une structure interne (34) à languettes prévue pour interagir avec la partie filetée (12) de la vis (10). Le connecteur (30) en métal interagit avec le boîtier (50).
PCT/EP2021/079742 2020-10-30 2021-10-26 Ensemble de fixation pour moyen de réglage de visée de lampe de véhicule WO2022090271A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FRFR2011171 2020-10-30
FR2011171A FR3115744A1 (fr) 2020-10-30 2020-10-30 Ensemble de fixation pour un dispositif de réglage de la visée d'un feu de véhicule

Publications (1)

Publication Number Publication Date
WO2022090271A1 true WO2022090271A1 (fr) 2022-05-05

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ID=77180051

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2021/079742 WO2022090271A1 (fr) 2020-10-30 2021-10-26 Ensemble de fixation pour moyen de réglage de visée de lampe de véhicule

Country Status (2)

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FR (1) FR3115744A1 (fr)
WO (1) WO2022090271A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2304311A (en) * 1940-08-05 1942-12-08 Richard W Luce Fastener means
US3525285A (en) * 1968-10-08 1970-08-25 Tinnerman Products Inc Fastening assembly device
US4606688A (en) * 1982-12-15 1986-08-19 Eaton Corporation Removable fastening assembly
US5197799A (en) * 1990-07-23 1993-03-30 Valeo Vision Headlamp having beam orientation adjusting means
US5453914A (en) * 1992-08-29 1995-09-26 Robert Bosch Gmbh Arrangement with at least two structural parts adjustably connectable by an adjusting screw
US7008135B2 (en) * 2002-01-31 2006-03-07 Guide Corporation Stamped ball socket
US10583772B2 (en) * 2017-09-25 2020-03-10 Koito Manufacturing Co., Ltd. Vehicle lamp having a leveling actuator coupled to an aiming nut

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2304311A (en) * 1940-08-05 1942-12-08 Richard W Luce Fastener means
US3525285A (en) * 1968-10-08 1970-08-25 Tinnerman Products Inc Fastening assembly device
US4606688A (en) * 1982-12-15 1986-08-19 Eaton Corporation Removable fastening assembly
US5197799A (en) * 1990-07-23 1993-03-30 Valeo Vision Headlamp having beam orientation adjusting means
US5453914A (en) * 1992-08-29 1995-09-26 Robert Bosch Gmbh Arrangement with at least two structural parts adjustably connectable by an adjusting screw
US7008135B2 (en) * 2002-01-31 2006-03-07 Guide Corporation Stamped ball socket
US10583772B2 (en) * 2017-09-25 2020-03-10 Koito Manufacturing Co., Ltd. Vehicle lamp having a leveling actuator coupled to an aiming nut

Also Published As

Publication number Publication date
FR3115744A1 (fr) 2022-05-06

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