CN110553216A - Vehicle lamp - Google Patents

Vehicle lamp Download PDF

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Publication number
CN110553216A
CN110553216A CN201811036050.XA CN201811036050A CN110553216A CN 110553216 A CN110553216 A CN 110553216A CN 201811036050 A CN201811036050 A CN 201811036050A CN 110553216 A CN110553216 A CN 110553216A
Authority
CN
China
Prior art keywords
lamp
light source
housing
source unit
light
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
CN201811036050.XA
Other languages
Chinese (zh)
Other versions
CN110553216B (en
Inventor
户塚贵丈
长瀬一真
河内直树
杉本将希
道家幸治
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.)
Koito Manufacturing Co Ltd
Original Assignee
Koito Manufacturing Co Ltd
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 Koito Manufacturing Co Ltd filed Critical Koito Manufacturing Co Ltd
Publication of CN110553216A publication Critical patent/CN110553216A/en
Application granted granted Critical
Publication of CN110553216B publication Critical patent/CN110553216B/en
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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/30—Fog lights
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles

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)

Abstract

A light source unit (20) having a light emitting element (22) as a light source is attached to a rear wall section (112c) of a housing (112). At this time, the base (26) of the light source unit (20) is mounted on the housing (112) by inserting the base (26) into an opening formed in the rear wall (112c) and rotating the base (26). In addition, the housing (112) is provided with an anti-reverse structure (160) which prevents the light source unit (20) from rotating from a specified mounting position to a loosening direction by abutting against a lamp holder (26) of the light source unit (20). Therefore, the shape of the light distribution pattern formed by the light emitted from the projection lens (32) and coming from the light emitting element (22) can be prevented from being different from the desired shape. Therefore, in the vehicle lamp with a movable lens for controlling the light distribution of the light from the light source by the projection lens, the shape of the light distribution pattern can be maintained in a desired shape even when the light source unit of the rotary mounting type is used.

Description

Vehicle lamp
Technical Field
The present invention relates to a vehicle lamp configured to perform light distribution control of light from a light source by a projection lens.
Background
conventionally, as a configuration of a vehicle lamp, there is known a vehicle lamp in which light distribution control of light from a light source is performed by a projection lens.
Patent document 1 describes, as a configuration of such a vehicle lamp, a vehicle lamp of a movable lens type: the lamp has a lens in which an optical portion and a turning portion are integrally formed, and the turning portion is supported by a housing so as to be rotatable in the vertical direction.
The light source of the vehicle lamp described in patent document 1 includes a light emitting element supported by a rear wall portion of a housing via a substrate and a heat sink.
Documents of the prior art
Patent document
Patent document 1: japanese national laid-open publication No. 2015-522929
Disclosure of Invention
Technical problem to be solved by the invention
In such a vehicle lamp, the following configuration may be adopted: in addition to the light source unit including the light emitting element, the substrate on which the light emitting element is mounted, and the socket supporting the substrate, the socket of the light source unit is inserted into the opening formed in the rear wall portion of the housing and is rotated to be mounted on the housing.
By configuring such a rotatably mounted light source unit, the light source can be positioned with high accuracy in the front-rear direction of the lamp while simplifying the lamp structure, but there are the following problems.
That is, when the light source unit is rotated in the loosening direction from the predetermined mounting position due to vehicle vibration or the like, the shape of the light distribution pattern formed by the light emitted from the light source and emitted from the projection lens is different from the desired shape.
The present invention has been made in view of the above circumstances, and an object thereof is to provide a vehicle lamp in which a lens is movable to control the light distribution of light from a light source by a projection lens, and which can maintain the shape of a light distribution pattern in a desired shape even when a light source unit of a rotary attachment type is used.
Means for solving the problems
The present invention has a predetermined anti-reverse structure to achieve the above object.
That is, the vehicle lamp of the present invention is as follows:
A vehicle lamp for performing light distribution control of light from a light source by a projection lens, comprising: a lens holder for supporting the projection lens;
A housing that supports the lens holder so as to be rotatable about a rotation axis extending in a vehicle width direction;
The light source unit includes a light emitting element, a substrate on which the light emitting element is mounted, and a socket for supporting the substrate, the light source is configured as the light emitting element in the light source unit,
The light source unit is mounted on the housing by inserting the lamp holder into an opening formed in a rear wall of the housing and rotating the lamp holder,
The housing is provided with an anti-reverse structure which prevents the light source unit from rotating from a specified mounting position to a loosening direction by abutting against the lamp holder.
The type of the vehicle lamp of the present invention is not particularly limited, and for example, a fog lamp, a headlamp, or the like may be used.
The "lens holder" may be supported by the housing so as to be rotatable about a rotation axis extending in the vehicle width direction, and the specific configuration thereof is not particularly limited.
The "anti-reverse structure" may be any structure as long as it can prevent the light source unit from rotating in the loosening direction from the predetermined mounting position by coming into contact with the socket, and the specific structure thereof is not particularly limited.
Effects of the invention
In the vehicle lamp according to the present invention, the lens holder that supports the projection lens is supported by the housing so as to be rotatable in the vertical direction, and therefore, the optical axis adjustment in the vertical direction can be performed in a state where the light source is fixed to the housing. Therefore, the vehicle lamp can be made compact, and can be applied to a vehicle lamp such as a fog lamp in particular.
Further, the light source of the vehicle lamp according to the present invention is configured as a light emitting element of a light source unit, and the light source unit includes: the light emitting element, the substrate on which the light emitting element is mounted, and the lamp socket supporting the substrate can simplify the lamp structure.
In this case, the light source unit is mounted to the housing by inserting the socket of the light source unit into the opening formed in the rear wall portion of the housing and rotating the socket, so that the light source can be positioned in the front-rear direction of the lamp with high accuracy.
In addition, since the housing is provided with the anti-reverse structure that prevents the light source unit from rotating in the loosening direction from the predetermined attachment position by coming into contact with the socket of the light source unit, it is possible to prevent the light distribution pattern for the fog lamp formed by the light emitted from the light source emitted from the projection lens from having a shape different from a desired shape.
As described above, according to the present invention, in the vehicle lamp of the lens movable type in which the light distribution of the light from the light source is controlled by the projection lens, even when the light source unit of the rotation mounting type is used, the shape of the light distribution pattern can be maintained in a desired shape.
In the above configuration, if a configuration is adopted in which a plurality of white light emitting diodes are arranged adjacent to each other as the light emitting element, and a configuration is adopted in which the light emitting surface of the light emitting element extends laterally long when the light emitting unit is rotated to the predetermined mounting position as the light emitting element, a laterally long light distribution pattern can be formed, and therefore the vehicle lamp can be a vehicle lamp particularly suitable for a fog lamp or the like.
In the above configuration, if a configuration including an abutment member for abutting against the socket of the light source unit and a fastening member for fastening the abutment member to the rear wall portion of the housing is further adopted as the anti-reverse structure, it is possible to prevent the light source unit from rotating in the loosening direction from the predetermined attachment position with a simple configuration.
In the above configuration, if a structure including a base body and a heat sink fixed to the base body is adopted for a lamp base as a light source unit, and a structure in which the abutting member abuts against the heat sink toward the light source unit is adopted, the following operational effects can be obtained.
That is, since the heat sink is formed of a hard member made of metal, the heat sink is hardly deformed even if the abutting member abuts, and therefore, the light source unit can be reliably prevented from rotating from the mounting position in the loosening direction.
the type of the "fixing member" is not particularly limited, but if it is formed of a screw, the contact member can be fastened with a simple structure.
In this case, if the screw is configured to have a screw hole shape capable of transmitting a rotational force only in a direction of tightening the screw, it is possible to prevent the light source unit from being rotated in a loosening direction from the attachment position due to the screw being detached by an inadvertent operation of a screwdriver or the like after the vehicle lamp is assembled.
In the above-described configuration, if a configuration including a fastening portion fixed to the rear wall portion of the case and a pair of arm portions extending from the fastening portion is further adopted as the configuration of the abutment member, and a configuration in which the distal end surfaces of the pair of arm portions are brought into contact with or close to the heat sink in a state in which the fastening portion is fastened to the rear wall portion of the case is adopted, the abutment member can be easily positioned.
In this case, if the heat sink is configured to include a disc-shaped distal end portion and a plurality of heat dissipating fins extending in a band-like manner toward the rear side of the lamp on the outer peripheral surface thereof, and the distal end portion is fixed to the socket body, and the distal end surfaces of the pair of arm portions are brought into contact with or close to the heat sink with respect to the pair of heat dissipating fins located at the end portions in the circumferential direction among the plurality of heat dissipating fins, the abutting member can be more easily positioned.
In this case, if the structure of the abutment member is further configured such that the pair of arm portions extend along the outer peripheral surface of the distal end portion of the heat sink in a state where the fastening portion is fastened to the rear wall portion of the case, the pair of arm portions can be used as the guide member when the abutment member is fixed to the rear wall portion of the case.
In the above configuration, if the contact member is further formed of a plate-like member made of resin, the anti-reverse structure can be made simple and lightweight.
Drawings
fig. 1 is a plan sectional view showing a vehicle lamp according to a first embodiment of the present invention.
Fig. 2 is a sectional view II-II of fig. 1.
Fig. 3 is a front view showing the vehicle lamp.
Fig. 4 is a detailed view of a main portion of fig. 2.
Fig. 5 (a) is a detail view of the Va portion of fig. 3, and (b) is a detail view of the Vb portion of fig. 3.
Fig. 6 is a view in the direction VI of fig. 5 (b), and shows how the filter is attached to the housing of the vehicle lamp.
Fig. 7 is a plan sectional view showing a state in which a lens holder is attached to a housing in the vehicle lamp.
Fig. 8 is a front view showing a state in which the light source unit is attached to the housing in the above vehicle lamp.
Fig. 9 (a) is a rear view partially showing the vehicle lamp, and (b) is a view similar to (a) showing a first modification of the first embodiment.
fig. 10 is a view similar to fig. 1 showing a second modification of the above embodiment.
Fig. 11 is a plan sectional view showing a vehicle lamp according to a second embodiment of the present invention.
FIG. 12 is a detail view of the section XII-XII of FIG. 11.
fig. 13 is a front view showing a housing to which the light source unit is attached in the second embodiment.
Fig. 14 is a rear view showing a state in which a projection lens is attached to a lens holder in the second embodiment.
Fig. 15 is a perspective view showing the above-described assembly as viewed obliquely from the rear and downward.
Description of the reference numerals
10. 210, 510 vehicle lamp
12. 112, 512 casing
12a, 512a right side wall portion
12a1, 512a1 fulcrum engaging recess (fulcrum engaging part)
12a2, 12b2, 512a2, 512b2 groove parts
12b, 512b left side wall
12b1, 512b1 fulcrum engaging hole (fulcrum engaging part)
12b3 vent hole
12b4 annular ridge
12b5 plane part
12c, 112c, 512c rear wall
12c1 and 512c1 openings
12c2 stop
12c3, 112c3, 512c3 Ribs
12c3a, 112c3a notch
12c3b, 12c3c, 112c3b, 112c3c marker
12d, 512d extension
12d1 separation preventing part
12e annular groove part
12f support
14. 514 light-transmitting cover
14A, 514A cover body part
14B, 514B outer peripheral flange
14Ba projecting flange part
14Bb annular projection
20 light source unit
22 luminous element (light source)
24 base plate
26 lamp holder
26A lamp holder body
26Aa engaging projection
26Ab connector section
26B heat sink
26B1 front end
26B2 radiating fin
28 elastic sealing member
20. 230, 530 light distribution control unit
32. 232, 532 projection lens
32a, 232a caulking projection
32A, 532A lens body
32B, 532B outer peripheral flange portion
34. 234, 534 lens holder
34a slit
34A, 234A, 534A body portion
34Aa through hole
34B, 234B, 534B protruding sheet
Rear region of 34Ba, 534Ba
34Ba1, 534Ba1 groove part
34Bb separation-preventing projection
34L, 34R, 234L, 234R foot
34La, 34Ra fulcrum projection
34Lb Rib
36. 236, 536 reflective member
36a opening part
36s, 536s reflective element
40 optical axis adjusting screw
40a screw part
40b shaft part
Insertion hole of 40c screwdriver
42O-shaped ring
50. 552 filter element
100 bumper
100a opening part
112c4 boss part
160 anti-reverse structure
162 abutting member
162A fastening portion
162B arm
164 screw
164a screw hole
234Ab lens pressing part
236b outer peripheral flange portion
512g step part
512h vent hole
512i boss part
532Ba, 532Bb fastening engagement part
532Ba1, 532Bb1 notch part
532Ba2, 532Bb2 engaging projection
532Bc, 532Bd rib clamping part
532Bc1, 532Bd1 convex part
532Bc2, 532Bd2 concave part
532Be positioning projection
534Ab, 534Ac lens fastening part
534Ab1, 534 lens stop hole
534Ab2, 534Ac2 guide recess
534Bc, 534Rc positioning ribs
534L, 534R foot
534La, 534Ra fulcrum projection
534Lb, 534Rb anti-separation protrusion
536a cylindrical part
554 cap
Ax optical axis
Ax1 axis of rotation
Ax2 axis
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
First, a first embodiment of the present invention will be explained.
Fig. 1 is a plan sectional view showing a vehicle lamp 10 according to the present embodiment, and fig. 2 is a sectional view taken along line II-II of fig. 1. Fig. 3 is a front view showing the vehicle lamp 10. Fig. 3 shows a state in which a part of the components is cut away.
In these figures, the direction indicated by X is "forward" with respect to the lamp (also "forward" with respect to the vehicle), the direction indicated by Y is "left" perpendicular to "forward" (also "left" with respect to the vehicle, but "right" with respect to the lamp when viewed from the front), and the direction indicated by Z is "upper". The same applies to the other drawings.
As shown in these figures, a vehicle lamp 10 according to the present embodiment is a fog lamp provided at the front right end portion of a vehicle, and includes a housing 12 functioning as a lamp body and a transparent translucent cover 14 attached to a front end opening portion thereof to form a lamp chamber, and a light emitting element 22 serving as a light source and a light distribution control unit 30 for controlling the light distribution of light from the light emitting element 22 are accommodated in the lamp chamber.
The light distribution control unit 30 is supported by the housing 12 so as to be rotatable in the vertical direction. The light emitting element 22 is a part of the light source unit 20, and the light source unit 20 is attached to the rear wall portion 12c of the housing 12.
the light-transmitting cover 14 has a cover body portion 14A and an outer peripheral flange portion 14B, the cover body portion 14A has a laterally elongated oblong outer shape when the lamp is viewed from the front, and the outer peripheral flange portion 14B is positioned on the outer peripheral side of the cover body portion 14A. The cover body portion 14A is formed to extend along a convex curved surface close to a spherical surface, and is disposed in a state of being inclined toward the lamp rear side from a left end portion (a right end portion when the lamp is viewed from the front) to a right end portion thereof.
The outer peripheral flange portion 14B has a laterally long oblong outer shape one turn larger than the cover main body portion 14A, and the outer peripheral flange portion 14B has a protruding flange portion 14Ba formed in a portion located on the lower left side thereof. The protruding flange portion 14Ba is formed to protrude from a general portion of the outer peripheral flange portion 14B toward the outer peripheral side in the shape of a right triangle having two sides extending in the horizontal direction and the vertical direction.
As described above, by forming the protruding flange portion 14Ba in the outer peripheral flange portion 14B of the light-transmitting cover 14, it is possible to prevent the light-transmitting cover 14 from being erroneously mounted in a vertically inverted state, and to prevent the light-transmitting cover 14 from being erroneously mounted between the fog lamp (i.e., the lamp to be paired with the vehicle lamp 1) provided at the left front end portion of the vehicle.
The housing 12 has the same outer shape as that of the light-transmitting cover 14 when the lamp is viewed from the front. The light-transmitting cover 14 is fixed to the housing 12 in a state in which an annular protrusion 14Bb formed on the rear surface of the outer peripheral flange 14B thereof is inserted into an annular groove 12e formed at the front end opening of the housing 12. This fixing is performed by ultrasonic welding in a state where the distal end portion of the annular protrusion 14Bb of the light-transmitting cover 14 is in contact with the bottom surface portion of the annular groove portion 12e of the case 12.
The vehicle lamp 10 is attached to a vehicle body side member (not shown) in a state of being embedded in a bumper 100 (a member indicated by a two-dot chain line in fig. 1) of a vehicle.
Specifically, the vehicle lamp 10 is attached to the vehicle body side member in a state in which the cover main body portion 14A of the translucent cover 14 is exposed to the opening portion 100a formed in the bumper 100 at the two pairs of left and right brackets 12f formed in the housing 12. At this time, by forming the opening portion 100a of the bumper 100 in advance in an oblong inner peripheral edge shape slightly larger in lateral length than the outer peripheral edge shape of the cover main body portion 14A of the light-transmitting cover 14, it is possible to cover the bumper 100 with a large portion of the outer peripheral flange portion 14B protruding beyond the flange portion 14 Ba.
Next, a specific configuration of the light distribution control unit 30 and a support structure of the housing 20 will be described.
The light distribution control unit 30 includes a projection lens 32 for controlling the deflection of the direct light from the light emitting element 22, and a lens holder 34 for supporting the projection lens 32.
The projection lens 32 is made of a colorless and transparent acrylic resin or the like, and its optical axis Ax extends in the front-rear direction of the lamp in the vicinity below the light emitting element 22.
The projection lens 32 includes a lens body 32A having a convex front surface and a flat rear surface, and an outer peripheral flange 32B formed in an annular shape on the outer peripheral side of the lens body 32A so as to be flush with the rear surface of the lens body 32A. The projection lens 32 has an oval outer shape that is long in the lateral direction when the lamp is viewed from the front, and is disposed in a state of being inclined toward the rear of the lamp from the left end to the right end thereof. The projection lens 32 emits the direct light from the light emitting element 22 toward the front of the lamp as light which is directed slightly downward and largely diffused in the vehicle width direction at the lens main body portion 32A, thereby forming a light distribution pattern for a fog lamp. In this case, the projection lens 32 has a surface shape of the lens body 32A such that a maximum spread angle of the light emitted from the projection lens 32 to the outside in the vehicle width direction is larger than a maximum spread angle of the light emitted from the projection lens 32 to the inside in the vehicle width direction.
The lens holder 34 is made of a transparent member such as a colorless transparent polycarbonate resin. The lens holder 34 is formed such that an annular main body portion 34A supporting the projection lens 32 at the outer peripheral edge portion of the projection lens 32 extends obliquely from the left end portion to the right end portion toward the lamp rear side along the rear surface of the projection lens 32, and a pair of leg portions 34L, 34R extending toward the lamp rear side are formed at both the left and right side portions thereof.
The lens holder 34 supports the projection lens 32 by fixing the projection lens 32 to the lens holder 34 at four positions by thermal caulking. In order to achieve this, caulking projections 32a are formed at four positions on the rear surface of the outer peripheral edge portion of the projection lens 32, and a through hole 34Aa for inserting the caulking projection 32a is formed in the main body portion 34A of the lens holder 34. In fig. 1 to 3, the caulking projections 32a are shown in a state after the heat caulking is performed.
In the vehicle lamp 10, external light passes through the translucent cover 14 and the projection lens 32 from the front side of the lamp and enters the internal space of the housing 12 (i.e., the space behind the projection lens 32 in the lamp chamber), and a reflecting member 36 for reflecting the external light is disposed at the rear side of the lamp with respect to the projection lens 32.
The reflecting member 36 is supported by the lens holder 34. Specifically, the reflecting member 36 is formed integrally with the lens holder 34, and is supported by the lens holder 34. Therefore, the reflecting member 36 is also made of a transparent member such as a transparent polycarbonate resin.
The reflecting member 36 is configured as an annular member extending from the outer peripheral edge portion of the main body portion 34A of the lens holder 34 toward the rear of the lamp in the direction closer to the optical axis Ax. Specifically, the reflecting member 36 is formed such that the front surface thereof extends along a curved surface having an intermediate shape between a conical surface and an elliptical conical surface, and an opening portion 36a having a circular inner peripheral shape close to the optical axis Ax is formed at the rear end portion thereof. At this time, the reflecting member 36 is disposed in a positional relationship not to block the light for light distribution control from the light emitting element 22 to the projection lens 32.
A plurality of reflecting elements 36s are formed on the rear surface of the reflecting member 36 (i.e., a portion overlapping the peripheral edge of the lens main body portion 32A of the projection lens 32 when the lamp unit is viewed from the front), and the reflecting elements 36s reflect external light transmitted through the projection lens 32 and entering the internal space of the housing 12 toward the projection lens 32. Each of the reflecting elements 36s has a surface shape such as a triangular pyramid or a triangular prism, and thus can totally reflect external light reaching the reflecting element 36 s. That is, the reflecting member 36 is configured such that, when the vehicle lamp 10 is viewed from the front side of the lamp, several reflecting elements 36s arranged at an angle of totally reflecting the external light in the viewing direction appear bright.
The light distribution control unit 30 is supported by the housing 12 at a pair of left and right leg portions 34L, 34R of the lens holder 34 so as to be rotatable about a rotation axis Ax1 extending in the vehicle width direction (i.e., the horizontal direction orthogonal to the optical axis Ax).
A specific structure for achieving this is as follows.
That is, the pair of right and left leg portions 34L, 34R extend in a plate shape from both right and left side portions of the main body portion 34A of the lens holder 34 toward the rear of the lamp in a plan view.
The pair of left and right legs 34L, 34R extend in a tongue-like shape from the main body portion 34A of the lens holder 34 toward the rear of the lamp in a side view. As shown in fig. 1, the pair of left and right leg portions 34L, 34R extend in directions slightly spreading away from each other rearward of the lamp with respect to a vertical plane extending in the front-rear direction of the lamp in a plan view. At this time, the left leg 34L is formed longer (more specifically, twice or longer) than the right leg 34R in accordance with the inclination of the main body portion 34A of the lens holder 34 from the left end to the right end toward the rear of the lamp. Further, a reinforcing rib 34Lb for improving the bending rigidity of the leg portion 34L is formed on the inner surface of the left leg portion 34L (i.e., the side surface located on the optical axis Ax side).
Fulcrum protrusions 34La, 34Ra protruding outward on the rotation axis Ax1 are formed on the outer side surfaces of the rear end portions of the leg portions 34L, 34R. Each of the fulcrum projections 34La and 34Ra is formed in a truncated cone shape, and the base end portion thereof is formed in a columnar shape, and the base end portion of the left fulcrum projection 34La is longer than the base end portion of the right fulcrum projection 34 Ra.
The light distribution control unit 30 is supported by the housing 12 so as to be rotatable about the rotation axis Ax1 by inserting the fulcrum projection 34Ra of the right leg portion 34R of the lens holder 34 into the fulcrum engagement recess 12a1 formed in the right side wall portion 12a of the housing 12 and inserting the fulcrum projection 34La of the left leg portion 34L into the fulcrum engagement hole 12b1 formed in the left side wall portion 12b of the housing 12.
That is, the fulcrum engaging recess 12a1 constituting the right fulcrum engaging portion is formed as a truncated cone-shaped recessed portion on the inner surface of the right side wall portion 12a of the case 12, and the fulcrum engaging hole 12b1 constituting the left fulcrum engaging portion is configured as a cylindrical through hole penetrating the left side wall portion 12b of the case 12 in the vehicle width direction.
A filter 50 is attached to the left side wall portion 12b of the housing 12 from the outer surface side thereof, and the filter 50 is used for closing a fulcrum engagement hole 12b1 (which will be described later).
Fig. 4 is a detailed view of a main portion of fig. 2.
As also shown in the drawing, the left rear end portion of the housing 12 is configured as an extension portion 12d that extends from the rear wall portion 12c toward the lamp rear side. An optical axis adjusting screw 40 for rotating the light distribution control unit 30 about a rotation axis Ax1 is rotatably supported by a lower wall portion of the protruding portion 12d about an axis Ax2 extending in the vertical direction.
The optical axis adjusting screw 40 is a resin (e.g., polyamide resin) member, and has a diameter that decreases stepwise from a lower end portion to an upper end portion thereof, and a threaded portion 40a formed at an upper end portion thereof. The threaded portion 40a is formed of a metric thread. The optical axis adjusting screw 40 is supported by the housing 12 at a shaft portion 40b located in the middle thereof in a state where the screw portion 40a thereof is exposed to the lamp chamber and the lower end portion thereof is exposed to the external space.
A screwdriver insertion hole 40c is formed in a lower end portion of the optical axis adjusting screw 40. When a driver, not shown, is inserted into the driver insertion hole 40c and operated, the optical axis adjusting screw 40 can be rotated about the axis Ax 2. An O-ring 42 is attached to the shaft portion 40b of the optical axis adjusting screw 40, and the O-ring 42 ensures airtightness in the lamp chamber.
The lens holder 34 has a projection piece 34B formed on the left side thereof and extending rearward of the lamp. The projecting piece 34B extends in a plate-like shape on the same vertical plane as the left leg portion 34L, and has a rear end edge located on the lamp rear side (the lamp rear side relative to the optical axis adjusting screw 40) relative to the rotation axis Ax 1.
In a side view, a portion of the projecting piece 34B from the main body portion 34A of the lens holder 34 to a position on the lamp rear side of the rotation axis Ax1 surrounds the left leg portion 34L with a substantially U-shaped slit 34A therebetween, and a rear region 34B on the lamp rear side of the portion extends with a substantially constant vertical width toward the lamp rear side at the same height position as the optical axis Ax.
The outer side surface (the side surface on the opposite side of the optical axis Ax) of the projection piece 34B is formed in a single plane shape, a step is formed in a middle portion of the rear region 34Ba on the inner side surface of the projection piece 34B, and the thickness of a portion on the lamp rear side than the step is thinner than the thickness of other general portions (see fig. 1). A plurality of (specifically, three) groove portions 34Ba1 are formed on the inner side surface of the thin portion, and the plurality of groove portions 34Ba1 are screwed with the optical axis adjusting screw 40.
The plurality of groove portions 34Ba1 are screw-engaged with the threaded portion 40a of the optical axis adjustment screw 40 centered at the same height position as the optical axis Ax when the optical control unit 30 is at the rotation reference position, that is, the reference position of the optical axis adjustment thereof.
Each of the groove portions 34Ba1 extends in the front-rear direction of the lamp in a substantially wedge-shaped vertical sectional shape, and has an upper-lower width set to a value equal to the pitch of the threaded portion 40a of the optical axis adjusting screw 40.
The inner surface of the rear region 34Ba of the projecting piece 34B is tapered in the vicinity of the rear end edge in a plan view, and the rear end surfaces of the plurality of groove portions 34Ba1 are formed in a zigzag shape in a side view.
The inner side surface of the left side wall portion 12B of the housing 12 extends to the projecting portion 12d maintaining a smooth planar shape, and a disengagement preventing portion 12d1 for preventing the groove portion 34Ba1 of the projecting piece 34B from being disengaged from the screw-engaged state with the optical axis adjusting screw 40 is formed at the rear end portion thereof. The detachment prevention portion 12d1 is formed in a positional relationship in which a partial region of the rear end portion of the inner surface of the left side wall portion 12B is thicker toward the inner surface side than other general portions, and is close to the outer surface of the rear region 34Ba of the projecting piece 34B.
In a front region of the projection piece 34B on the lamp front side of the rotation axis Ax1, a pair of upper and lower detachment prevention projections 34Bb are formed on the outer side surface thereof. Specifically, the pair of upper and lower detachment prevention protrusions 34Bb are formed at the tip end of the protrusion piece 34B at positions adjacent to the upper and lower portions of the substantially U-shaped slit 34 a.
Each of the disengagement prevention protrusions 34Bb has a trapezoidal outer shape that is long in the front-rear direction of the lamp in plan view, and the distal end surface thereof is close to the inner surface of the left side wall portion 12b of the housing 12. At this time, the gap between the distal end surface of each detachment prevention protrusion 34Bb and the inner surface of the left side wall portion 12b of the housing 12 is set to a value smaller than the insertion depth of the fulcrum protrusion 34Ra of the right leg portion 34R of the lens holder 34 into the fulcrum engagement recess 12a1 in a state of being engaged with the fulcrum engagement recess 12a1 of the housing 12.
Fig. 5 (a) is a detailed view of the Va portion of fig. 3, and fig. 5 (b) is a detailed view of the Vb portion of fig. 3.
As shown in fig. 5 (a), a groove 12a2 extending from the fulcrum engagement recess 12a1 toward the front of the lamp is formed on the inner surface of the right side wall 12a of the housing 12.
The vertical width of the front region of the groove portion 12a2 is set to be larger than the vertical width of the rear region. Specifically, the groove 12a2 is formed such that the vertical width thereof gradually increases toward the front of the lamp. At this time, the vertical width of the groove portion 12a2 is set to be substantially the same as the outer diameter of the base end portion of the fulcrum projection 34Ra of the lens holder 34 at the rear end position thereof, and set to be about 2 to 4 times the vertical width at the rear end position thereof at the front end position thereof.
The depth of the front region of the groove portion 12a2 is set to be greater than the depth of the rear region thereof. Specifically, the groove 12a2 is formed such that the depth thereof gradually increases toward the front of the lamp. In this case, the depth of the groove portion 12a2 is set to a value of about 0.2 to 0.6 times the insertion depth of the fulcrum protrusion 34Ra into the fulcrum engagement recess 12a1 at the rear end position thereof, and to a value of about 0.6 to 1.2 times the insertion depth at the front end position thereof.
On the other hand, as shown in fig. 5 (b), a groove 12b2 extending from the fulcrum engagement hole 12b1 toward the front of the lamp is formed on the inner surface of the left side wall 12b of the housing 12.
The vertical width of the front region of the groove portion 12b2 is set to be larger than the vertical width of the rear region thereof. Specifically, the groove 12b2 is formed such that the vertical width thereof gradually increases toward the front of the lamp. At this time, the vertical width of the groove portion 12b2 is set to be substantially the same as the outer diameter of the base end portion of the fulcrum protrusion 34La of the lens holder 34 at the rear end position thereof, and is set to be about 2 to 6 times the vertical width at the rear end position thereof at the front end position thereof.
the depth of the front region of the groove portion 12b2 is set to be greater than the depth of the rear region thereof. Specifically, the groove 12b2 is formed such that the depth thereof gradually increases toward the front of the lamp. In this case, the depth of the groove portion 12a2 is set to a value of about 0.2 to 0.6 times the insertion depth of the fulcrum protrusion 34La into the fulcrum engagement hole 12b1 at the rear end position thereof, and to a value of about 0.6 to 1.2 times the insertion depth at the front end position thereof.
Fig. 6 is a view in the VI direction of fig. 5 (b), and shows how the filter member 50 is attached to the housing 12.
As shown in the drawing, the left side wall portion 12b of the case 12 is formed with a vent hole 12b3 penetrating the left side wall portion 12b in the vehicle width direction on the upper side of the fulcrum engagement hole 34 La. The vent hole 12b3 is formed in an arc shape surrounding the fulcrum protrusion 34La to absorb pressure fluctuations associated with changes in temperature of the gas in the lamp chamber, and has an opening shape larger than the fulcrum engagement hole 34 La.
A filter 50 is attached to the left side wall portion 12b of the housing 12 from the outer surface side thereof, and the filter 50 is used to close the fulcrum engagement hole 12b1 and the vent hole 12b 3.
The filter 50 is a sheet-like filter having water resistance and moisture diffusion properties, and has a circular outer shape. The filter 50 is made of a sheet-like material having a thickness of several tens of micrometers, such as expanded polytetrafluoroethylene (ePTFE), and has a structure in which a plurality of fine pores (for example, pores having a diameter of 10 μm or less) are formed in a mesh shape.
An annular convex strip portion 12b4 surrounding the fulcrum engagement hole 12b1 and the vent hole 12b3 is formed on the outer surface of the left side wall portion 12b, and the height of the annular convex strip portion 12b4 is set to a value larger than the thickness of the filter 50 (for example, a value of about 0.5 to 1 mm). Further, a region of the outer surface of the left side wall portion 12b on the inner peripheral side of the annular convex portion 12b4 is formed as a flat surface portion 12b 5.
The filter member 50 is attached to the outer surface of the left side wall portion 12b of the housing 12 by attaching the filter member 50 to the flat surface portion 12b5 on the inner peripheral side of the annular ridge portion 12b 4. At this time, the annular convex portion 12b4 functions as a positioning guide when the filter material 50 is attached to the left side wall portion 12b of the housing 12, and also functions to make it difficult for the filter material 50 attached to the left side wall portion 12b to peel off.
Fig. 7 is a plan cross-sectional view showing a state in which the lens holder 34 of the light distribution control unit 30 is attached to the housing 12 in the embodiment.
As shown in the drawing, in a state where the light distribution control unit 30 is inclined in the horizontal plane, the rear end portion of the projection piece 34B of the lens holder 34 and the fulcrum projection portion 34La of the left leg portion 34L are brought into contact with the inner surface of the left side wall portion 12B of the housing 12, and are elastically deformed. In this state, the right leg portion 34R is inserted into the case 12, and the fulcrum projection portion 34Ra of the leg portion 34R is inserted into the fulcrum engagement recess 12a1 of the right wall portion 12a of the case 12. Thereafter, the light distribution control unit 30 is rotated about the vicinity of the fulcrum projection 34Ra in the direction of the arrow shown, and the light distribution control unit 30 is pushed in, thereby moving the rear end portion of the projection piece 34B and the fulcrum projection 34La of the leg portion 34L toward the lamp rear side along the inner side of the left side wall portion 12B of the housing 12. Then, the rear end portion of the projecting piece 34B is caused to climb up the detachment prevention portion 12d1 formed at the rear end portion of the inner side surface of the left side wall portion 12B, and then the fulcrum projecting portion 34La of the leg portion 34L is inserted into the fulcrum engagement hole 12B1 of the left side wall portion 12B.
Thereby, the light distribution control unit 30 is supported by the housing 12 so as to be rotatable about the rotation axis Ax 1. At this time, the projecting piece 34B becomes a state in which it is screw-engaged with the threaded portion 40a of the optical axis adjusting screw 40 at the plurality of groove portions 34Ba1 formed on the inner side surface thereof, and the outer side surface thereof approaches the detachment prevention portion 12d1 of the housing 12.
Since the groove portion 12a2 extending from the fulcrum engagement recess portion 12a1 toward the front of the lamp is formed on the inner surface of the right side wall portion 12a of the case 12, when the right leg portion 34R is inserted into the case 12, the fulcrum protrusion portion 34Ra is engaged with the groove portion 12a2, and thus can be moved toward the rear of the lamp while being guided in the vertical direction, and can be easily inserted into the fulcrum engagement recess portion 12a 1.
Further, since the groove portion 12b2 extending from the fulcrum engagement hole 12b1 toward the front of the lamp is formed on the inner surface of the left side wall portion 12b of the case 12, when the left leg portion 34L is inserted into the case 12, the fulcrum protrusion portion 34La is engaged with the groove portion 12b2, and thus can be moved toward the rear of the lamp while being guided in the vertical direction, and can be easily inserted into the fulcrum engagement hole 12b 1.
As shown by the two-dot chain line in fig. 7, if the projection piece 34B and the left leg portion 34L are integrally formed as the structure of the lens holder 34, when the fulcrum projection portion 34La of the leg portion 34L abuts against the inner surface of the left side wall portion 12B of the housing 12, the projection piece 34B is separated from the inner surface of the left side wall portion 12B, and the rear end portion thereof interferes with the optical axis adjusting screw 40. However, since the lens holder 34 of the present embodiment is configured such that the projection piece 34B and the left leg portion 34L are elastically deformed independently of each other, such a problem does not occur, and the light distribution control unit 30 can be smoothly assembled.
Next, a specific structure of the light source unit 20 and a structure of mounting the light source unit to the housing 12 will be described.
Fig. 8 is a front view showing a state in which the light source unit 20 is attached to the housing 12 in the vehicle lamp 10. Fig. 9 (a) is a rear view partially showing the vehicle lamp 10.
As shown in fig. 8, an opening 12c1 for attaching the light source unit 20 is formed in the rear wall 12c of the case 12.
The light source unit 20 includes a substrate 24 on which the light emitting element 22 is mounted, and a socket 26 for supporting the substrate 24.
The light emitting element 22 has a rectangular light emitting surface that is laterally long, by arranging three white light emitting diodes adjacent to each other in the vehicle width direction (i.e., the left-right direction). The light emitting element 22 is disposed with its light emitting surface facing the front direction of the lamp (i.e., the front of the vehicle).
The light source unit 20 is a rotary-mounting type light source unit, and is mounted to the housing 12 by inserting the socket 26 from the lamp rear side into the opening 12c1 of the housing 12 and rotating clockwise by a predetermined angle (specifically, 45 °).
The socket 26 of the light source unit 20 includes a resin socket body 26A and a metal (e.g., cast aluminum) heat sink 26B fixed to the socket body 26A.
The socket main body 26A is formed in a cylindrical shape with an outer diameter slightly smaller than the inner diameter of the opening 12c1 of the housing 12, and a plurality of engaging projections 26Aa for engaging with the rear wall 12c of the housing 12 around the opening 12c1 are formed on the outer peripheral surface of the front end surface thereof. As shown in fig. 9 (a), a connector portion 26Ab is formed at the rear end of the socket main body 26A, and the connector portion 26Ab is used for supplying power to the light source unit 20.
The heat sink 26B has a disc-shaped distal end portion 26B1, and the heat sink 26B is fixed to the socket body 26A at the distal end portion 26B 1. The heat sink 26B has five heat dissipating fins 26B2 extending in a band-like shape toward the rear of the lamp on the outer peripheral surface of the distal end portion 26B 1. The five heat dissipating fins 26B2 are formed at the apex position of the light source 20 and at positions spaced apart from the apex position to the left and right sides by equal intervals (specifically, 45 ° intervals).
The light source unit 20 has an elastic sealing member 28 attached to a front end portion of a lamp socket 26 thereof. The elastic sealing member 28 is formed of an annular member having elasticity such as an O-ring fitted into the outer peripheral surface of the socket body 26A, and is attached in a state of being in contact with the distal end portion 26B1 of the heat sink 26B. When the light source unit 20 is attached to the housing 12, the elastic sealing member 28 is pressed against the rear wall portion 12c of the housing 12 and elastically compressed and deformed, thereby ensuring airtightness in the lamp chamber.
As shown in fig. 8, the opening 12c1 of the housing 12 has an opening shape having projections and depressions corresponding to the plurality of engaging projections 26Aa formed in the socket body 26A. The uneven shape of the opening 12c1 is formed in a positional relationship such that the plurality of engaging protrusions 26Aa of the light source unit 20 (shown by two-dot chain lines in the figure) in the mounted state are rotated by 45 ° clockwise when the lamp is viewed from the front.
A stopper portion 12c2 is formed at a position around the opening portion 12c1 on the front surface of the rear wall portion 12c of the housing 12, and when the socket main body 26A inserted into the opening portion 12c1 is rotated 45 ° clockwise, the stopper portion 12c2 abuts against the engaging projection portion 26Aa of the socket main body 26A to restrict further rotation.
As shown in fig. 9 (a), a rib 12c3 is formed on the rear surface of the rear wall portion 12c of the housing 12, and the rib 12c3 surrounds the opening portion 12c1 and extends rearward of the lamp.
The rib 12c3 surrounds the opening 12c1 in the entire circumferential direction and has a notch 12c3a formed at the lower end thereof.
The rib 12c3 extends along a cylindrical surface centered on the central axis of the light source unit 20. At this time, the rib 12c3 extends to a position further toward the lamp rear side than the position where the elastic sealing member 28 is pressed against the rear wall portion 12c of the housing 12. Specifically, as shown in fig. 1, the rear end surface of the rib 12c3 is located further toward the lamp rear side than the contact position between the elastic sealing member 28 and the distal end portion 26B1 of the heat sink 26B. The central axis of the light source unit 20 is located near above the optical axis Ax. When the light source unit 20 is attached to the housing 20, the light emitting element 22 is disposed in a state in which the lower end edge of the light emitting surface thereof extends in the horizontal direction in the vicinity above the optical axis Ax (see fig. 3 and 8).
As shown in fig. 9 (a), a mark 12c3b indicating a predetermined mounting position of the rotatably mounted light source unit 20 is formed on the outer peripheral surface of the rib 12c 3. The mark 12c3b is formed at a position directly above the center axis of the light source unit 20 and indicates that the light source unit 20 is mounted in an upright state.
Further, another mark 12c3c is formed on the outer peripheral surface of the rib 12c3 at a position rotated 45 ° counterclockwise from the mark 12c3b when the lamp is viewed from the rear. The mark 12c3c indicates the angular position when the light source unit 20 is inserted into the opening 12c 1.
At this time, the mark 12c3b is a triangular protrusion when the lamp is viewed from the rear. On the other hand, the mark 12c3c is formed as a semicircular arc-shaped protrusion when the lamp is viewed from the rear.
Next, the operation and effects of the present embodiment will be described.
In the vehicle lamp 10 of the present embodiment, since the lens holder 34 that supports the projection lens 32 is supported by the housing 12 so as to be rotatable in the vertical direction, the optical axis adjustment in the vertical direction can be performed in a state where the light emitting element 22 is fixed to the housing 12 and not moved. Therefore, the vehicle lamp 10 can be made compact, and can be applied to a vehicle lamp such as a fog lamp in particular.
In addition, since the light emitting element 22 as a light source is configured as a part of the light source unit 20 including the socket 26 for supporting the substrate 24 on which the light emitting element 22 is mounted, the structure of the lamp can be simplified.
At this time, since the light source unit 20 is configured to be attached to the housing 12 by inserting the socket 26 into the opening 12c1 formed in the rear wall portion 12c of the housing 12 and rotating the socket 26, the light emitting element 22 can be positioned in the front-rear direction of the lamp with high accuracy.
In the first embodiment, the case where the projection lens 32 is formed in a plano-convex lens shape has been described, but a projection lens formed in a lenticular lens shape or a convex meniscus lens shape, a projection lens formed in a fresnel lens shape, or the like may be used.
In the first embodiment, the case where the opening 36a is formed in the rear end portion of the reflecting member 36 has been described, but a structure in which a portion located in the opening 36a is formed in a transparent lens shape may be employed.
In the first embodiment, the case where the housing 12 supporting the light distribution control unit 30 is a lamp body has been described, but other lamp component parts (for example, a part supported by the lamp body) may be used.
In the first embodiment, the case where the vehicle lamp 10 is a fog lamp has been described, but may be configured as another lamp (e.g., a headlamp).
Next, a modified example of the first embodiment will be described.
First, a first modification of the first embodiment will be described.
Fig. 9 (b) is a view similar to fig. 9 (a) and partially showing the vehicle lamp according to the present modification.
As shown in fig. (b), the basic configuration of this modification is the same as that of the first embodiment, but the structure for attaching the light source unit 20 to the housing 12 is partially different from that of the first embodiment.
That is, in the present modification, the light source unit 20 is attached to the housing 112 by inserting the socket 26 of the light source unit 20 from the lamp rear side into the opening (not shown) of the housing 112 and rotating the same clockwise by a predetermined angle, but the housing 112 is provided with the anti-reverse structure 160, which is different from the case of the above-described embodiment.
The anti-reverse structure 160 is configured to prevent the light source unit 20 from rotating in the loosening direction from a predetermined attachment position by abutting against the socket 26.
Specifically, the anti-reverse structure 160 has an abutment member 162 for abutting against the socket 26 and a screw 164 as a fastening member for fastening the abutment member 162 to the rear wall portion 112c of the housing 112.
The screw 164 fixes the abutment member 162 to the rear wall portion 112c of the housing 112 at a position directly below the light source unit 20.
To achieve this, a boss portion 112c4 is formed on the rear wall portion 112c of the housing 112, and the boss portion 112c4 is used to fix the screw 164 at a position directly below the optical axis Ax.
in the case 112 of the present modification, a rib 112c3 is also formed on the rear surface of the rear wall portion 112c, and the rib 112c3 extends along a cylindrical surface centered on the central axis of the light source unit 20. At this time, the rib 112c3 is formed such that the lower end portion thereof extends to the vicinity of the boss portion 112c4, thereby forming notched portions 112c3a on both the left and right sides of the boss portion 112c 4.
The height (i.e., the amount of rearward projection) of the rib 112c3 is set to the same value as the rib 112c3 of the above-described embodiment. Further, marks 112c3b and 112c3c similar to those of the above embodiment are formed on the outer peripheral surface of the rib 112c3 at the same positions as those of the above embodiment.
The contact member 162 is a resin plate-shaped member, and includes a fastening portion 162A and a pair of arm portions 162B, the fastening portion 162A is fixed to the boss portion 112c4 of the housing 112 by a screw 164, and the pair of arm portions 162B extend from the fastening portion 162A in both the left and right directions along the rib 112c 3.
In the contact member 162, the distal end surfaces of the pair of left and right arm portions 162B are in contact with (or close to) the heat sink 26B of the light source unit 20 in a state of being fixed to the boss portion 112c4 of the housing 112 by the screw 164. At this time, the abutment member 162 abuts against the heat sink 26B with respect to the pair of right and left heat radiating fins 26B2 positioned at the lowermost end of the five heat radiating fins 26B 2. The contact member 162 is in contact with the heat radiation fins 26B2 of the heat sink 26B, thereby preventing the light source unit 20 from rotating in the loosening direction from the predetermined attachment position.
In the abutment member 162, the inner peripheral edge of each arm portion 162B is formed to extend along the outer peripheral surface of the distal end portion 26B1 of the heat sink 26B in a state of being fixed to the boss portion 112c4 of the case 112.
The screw 164 is configured as a screw with a seat, and has a screw hole shape capable of transmitting a rotational force only in a direction of tightening the screw 164. That is, the screw hole 164a of the screw 164 has a shape in which a plus (+) shaped groove portion lacks a wall surface positioned in a counterclockwise direction thereof.
Even in the case of adopting the configuration of the present modification, the same operational effects as in the case of the first embodiment can be obtained.
further, by providing the anti-reverse structure 160 as in the present modification, the light source unit 20 is always held at the predetermined attachment position, and therefore, it is possible to prevent the light distribution pattern shape for the fog lamp formed by the light from the light source emitted from the projection lens 32 from being different from the desired shape.
Further, in the present modification, since the anti-reverse structure 160 that prevents the light source unit 20 from rotating in the loosening direction from the predetermined attachment position by coming into contact with the socket 26 of the light source unit 20 is provided in the housing 112, it is possible to prevent the light distribution pattern shape formed by the light emitted from the light emitting element 22 emitted from the projection lens 32 from being different from the desired shape.
Further, since the light emitting element 22 of the light source unit 20 is configured such that a plurality of white light emitting diodes are arranged adjacent to each other, and the light emitting surface of the light emitting element 22 extends in a laterally long manner when the light emitting unit 20 is rotated to the predetermined mounting position, and the lower edge of the light emitting surface thereof is arranged in a state of extending in the horizontal direction in the vicinity above the optical axis Ax, a laterally long light distribution pattern having a horizontal cutoff line can be formed at the upper end edge, and thus the vehicle lamp can be applied to a vehicle lamp, particularly, a fog lamp or the like.
In this case, in the present modification, since the anti-reverse structure 160 is configured to include the contact member 162 for contacting the socket 26 of the light source unit 20 and the screw 164 as a fastening member for fastening the contact member 162 to the rear wall portion 112c of the housing 112, it is possible to prevent the light source unit 20 from rotating in the loosening direction from the predetermined attachment position with a simple configuration.
Further, the lamp socket 26 of the light source unit 20 is configured to include the lamp socket body 26A and the heat sink 26B fixed to the lamp socket body 26A, and the contact member 162 is configured to be in contact with the light source unit 20 with respect to the heat sink 26B, so that the following operational effects can be obtained.
That is, since the heat sink 26B is formed of a hard member made of metal, the contact member 162 is hardly deformed even when it is contacted, and thus the light source unit 20 can be reliably prevented from rotating in the loosening direction from the mounting position.
Further, in the present modification, since the fastening member is constituted by the screw 164, the fastening of the contact member 162 can be performed with a simple configuration.
Further, since the screw 164 has the screw hole 164a capable of transmitting the rotational force only in the direction of tightening the screw 164, it is possible to prevent the light source unit 20 from being rotated in the loosening direction from the attachment position due to the screw 164 being detached by an inadvertent driver operation after the vehicle lamp 10 is assembled.
In the present modification, the contact member 162 includes the fastening portion 162A fixed to the rear wall portion 112c of the case 112 and the pair of arm portions 162B extending from the fastening portion 162A, and the distal end surfaces of the pair of arm portions 162B are configured to contact or come close to the heat sink 26B in a state where the fastening portion 162A is fastened to the rear wall portion 112c of the case 112, so that the contact member 162 can be easily positioned.
in this case, the heat sink 26B is configured to include the disc-shaped distal end portion 26B1 and the plurality of heat dissipating fins 26B2 extending in a band shape toward the lamp rear side on the outer peripheral surface thereof, and is fixed to the socket main body 26A at the distal end portion 26B1 thereof, and the distal end surfaces of the pair of arm portions 162B come into contact with or approach the heat sink 26B with respect to the pair of heat dissipating fins 26B2 located at the end portions in the circumferential direction among the five heat dissipating fins 26B2, so that the abutment member 162 can be more easily positioned.
Further, since the contact member 162 is configured such that the pair of arm portions 162B extend along the outer peripheral surface of the distal end portion 26B1 of the heat sink 26B in the state where the fastening portion 162A is fastened to the rear wall portion 112c of the case 112, the pair of arm portions 162B can be used as a guide member when the contact member 162 is fixed to the rear wall portion 112c of the case 112.
further, since the contact member 162 is formed of a plate-like member made of resin, the anti-reverse structure 160 can be made simple and lightweight.
In the first modification described above, the case where the fastening member is constituted by the screw 164 has been described, but a case where it is constituted by a snap or the like may be employed.
Next, a second modification of the first embodiment will be described.
Fig. 10 is a view similar to fig. 1 showing a vehicle lamp 210 according to this modification.
As shown in the drawing, the basic configuration of the present modification is the same as that of the first embodiment, but the configuration of the light distribution control unit 230 is partially different from that of the first embodiment.
The light distribution control unit 230 of the present modification also includes the projection lens 232, the lens holder 234, and the reflection member 236, but the reflection member 236 is configured separately from the lens holder 234, which is different from the case of the above-described embodiment.
Specifically, in the light distribution control unit 230 of the present modification, the reflection member 236 is sandwiched between the projection lens 232 and the lens holder 234 and is heat-staked.
In order to achieve this, an outer peripheral flange portion 236b is formed at the front end portion of the reflection member 236, while an annular lens pressing portion 234Ab is formed at the inner peripheral edge portion of the main body portion 234A of the lens holder 234, and the lens pressing portion 234Ab engages with the outer peripheral flange portion 236b of the reflection member 236 to position the reflection member 236 in contact with the rear surface of the projection lens 232. In a state where the reflecting member 236 is sandwiched between the projection lens 232 and the lens holder 234, the projection lens 232 is thermally caulked in a state where caulking protrusions 232a formed at four positions on the outer peripheral edge portion of the rear surface of the projection lens 232 are inserted into through holes (not shown) formed at four positions on the main body portion 234A of the lens holder 234.
The projection lens 232 is formed longer than the projection lens 32 of the first embodiment than the caulking projection 232a, and is otherwise configured in the same manner as in the first embodiment.
The lens holder 234 also has a main body portion 234A that is different in structure from the lens holder 34 of the first embodiment, and the pair of left and right leg portions 234L, 234R and the projecting piece 234B have the same structure as that of the first embodiment.
Further, the configuration of the reflecting member 236 other than the outer peripheral flange portion 236b is also the same as that of the first embodiment.
Even in the case of adopting the configuration of the present modification, the same operational effects as in the case of the first embodiment can be obtained.
In addition, with the configuration of the present modification, although the reflecting member 236 is formed separately from the lens holder 234, the reflecting member 236 can be supported by an inexpensive fixing structure.
Further, by configuring the reflecting member 236 separately from the lens holder 234 as in the present modification, the degree of freedom in the shape of the reflecting member 236 can be increased.
Next, a second embodiment of the present invention will be explained.
Fig. 11 is a top cross-sectional view showing a vehicle lamp 510 according to the present embodiment, and fig. 12 is a cross-sectional detail view of XII-XII in fig. 11.
As shown in these figures, the basic configuration of the vehicle lamp 510 of the present embodiment is the same as that of the first embodiment, but the vehicle lamp 510 is configured as a fog lamp provided at the left front end portion of the vehicle.
The shapes of the housing 512 and the light-transmitting cover 514 of the vehicle lamp 510 are partially different from those of the first embodiment, and the configurations of the light distribution control unit 530 and the reflecting member 536 are different from those of the first embodiment.
That is, the light-transmitting cover 514 of the present embodiment also includes a cover body portion 514A and an outer peripheral flange portion 514B, the cover body portion 514A has a laterally elongated oblong outer shape when the lamp is viewed from the front, and the outer peripheral flange portion 514B is positioned on the outer peripheral side of the cover body portion 514A, but the light-transmitting cover 514 is disposed facing the vehicle front direction and is supported by the housing 512 on a vertical plane orthogonal to the vehicle front-rear direction.
Further, the light distribution control unit 530 of the present embodiment also includes a projection lens 532 for controlling the deflection of the direct light from the light emitting element 22 and a lens holder 534 for supporting the projection lens 532, but the support is performed by fitting the projection lens 532 into the lens holder 534 (which will be described later).
The projection lens 532 includes a lens body 532A having a convex front surface and a flat rear surface, and an outer peripheral flange 532B formed annularly on the outer peripheral side of the lens body 532A so as to be flush with the rear surface of the lens body 532A. The projection lens 532 has an oval outer shape that is long in the lateral direction when the lamp is viewed from the front, and a concave-convex portion (which will be described later) for fitting into the lens holder 534 is formed on the outer peripheral surface of the outer peripheral flange portion 532B.
The lens holder 534 has a pair of leg portions 534L, 534R extending rearward of the lamp on both left and right sides of a main body portion 534A formed in a ring shape. The pair of left and right leg portions 534L, 534R are formed to have the same length, and fulcrum protrusions 534La, 534Ra are formed on the outer side surfaces of the rear end portions thereof, respectively.
The lens holder 534 is supported by the housing 512 so as to be rotatable about the rotation axis Ax1 by inserting the fulcrum projection 534Ra of the right leg portion 534R into the fulcrum engagement recess 512a1 formed in the right side wall portion 512a of the housing 512 and inserting the fulcrum projection 534La of the left leg portion 534L into the fulcrum engagement hole 512b1 formed in the left side wall portion 512b of the housing 512.
A vent hole (not shown) similar to the vent hole 12b3 of the first embodiment is formed in the left side wall portion 512b of the case 512, and a filter member 50 is attached to the left side wall portion 512b from the outer surface side thereof, and the filter member 50 is used to plug the vent hole and the fulcrum engagement hole 512b 1.
The separation prevention protrusions 534Lb and 534Rb are formed on the outer side surfaces of the distal end portions of the legs 534L and 534R, respectively.
Each of the disengagement prevention protrusions 534Lb and 534Rb has a trapezoidal outer shape that is long in the front-rear direction of the lamp in plan view, and the tip end surface thereof is formed to have a height close to the inner surfaces of the left side wall 512b and the right side wall 512a of the housing 512. At this time, the gap between the distal end surfaces of the detachment prevention protrusions 534Lb and 534Rb and the inner surfaces of the left side wall portion 512b and the right side wall portion 512a is set to a value smaller than the insertion depth of the fulcrum protrusions 534La and 534Ra in a state where the fulcrum protrusions 534La and 534Ra are engaged with the fulcrum engagement hole 512b1 and the fulcrum engagement recess 512a1, respectively.
A projection piece 534B extending rearward of the lamp is formed on the left side portion of the lens holder 534. The projecting piece 534B extends below the left leg portion 534L in a plate-like shape along a vertical plane parallel to the optical axis Ax, and is screwed to the optical axis adjusting screw 40 disposed in the extension portion 512d of the housing 512 in a groove portion 534Ba1 formed in the inner surface of the rear end portion of the rear region 534 Ba.
In the present embodiment, the light source unit 20 of the rotary attachment type is also attached to the rear wall portion 512c of the housing 512, but the opening portion 512c1 for this attachment is formed at a position displaced rightward (i.e., inward in the vehicle width direction) from the center position of the rear wall portion 512 c. Thus, the maximum spread angle of the light emitted from the projection lens 532 toward the outside in the vehicle width direction is larger than the maximum spread angle toward the inside in the vehicle width direction.
The peripheral portion of the opening 512c1 of the rear wall 512c of the housing 512 is formed as a cylindrical step portion 512g that is displaced toward the front side of the lamp with respect to the other general portions.
The stepped portion 512g has an inner peripheral surface shape that is slightly larger than the outer peripheral shape of the light source unit 20, and the amount of displacement of the stepped portion 512g in the forward direction is set so that the light emitting surface of the light emitting element 22 of the light source unit 20 is at the same position as the rotation axis Ax1 in the lamp front-rear direction.
In the present embodiment, a rib 512c3 that surrounds the opening 512c1 and extends rearward of the lamp is also formed on the rear surface of the rear wall 512c of the housing 512, but the inner peripheral surface of the rib 512c3 extends in a manner to be flush with the inner peripheral surface of the step portion 512g in a general portion of the rear wall 512 c.
The amount of rearward projection of the rib 512c3 from the general portion of the rear wall 512c is set to the same value as the rib 12c3 of the above-described embodiment. Therefore, the position of the rear end face of the rib 512c3 is greatly displaced toward the lamp rear side from the contact position of the elastic sealing member 28 and the distal end portion 26B1 of the heat sink 26B.
In the present embodiment, a reflecting member 536 is also disposed on the lamp rear side of the projection lens 532, and the reflecting member 536 is configured to reflect external light that is transmitted from the lamp front side through the light-transmitting cover 514 and the projection lens 532 and enters the internal space of the housing 512.
The reflecting member 536 is an opaque resin member, is formed separately from the lens holder 534, and is supported by the housing 512.
The reflecting member 536 surrounds the light source 20, is formed in a flat plate shape, has a front surface treated with a reflecting surface such as aluminum vapor deposition, and has a plurality of reflecting elements 536s formed thereon. Each of the reflecting elements 536s is formed as a concave portion in a triangular pyramid shape, and reflects light reaching the reflecting element 536 s.
The reflecting member 536 is fitted on the outer peripheral surface of the stepped portion 512g in a cylindrical portion 536a extending rearward of the lamp from the rear surface thereof. At this time, in the reflecting member 536, the plurality of reflecting elements 536s are positioned further toward the rear side of the lamp than the light emitting surface of the light emitting element 22 of the lamp unit 20, so that the light emitted from the light emitting element 22 is not incident on each reflecting element 536 s.
Fig. 13 is a front view showing the housing 512 to which the light source unit 20 is attached.
As shown in the drawing, in the present embodiment, a groove 512a2 extending from the fulcrum engaging recess 512a1 toward the front of the lamp is also formed in the inner surface of the right side wall 512a of the case 512, and a groove 512b2 extending from the fulcrum engaging hole 512b1 toward the front of the lamp is also formed in the inner surface of the left side wall 512b of the case 512.
The grooves 512a2, 512b2 are formed such that the vertical width and depth thereof gradually increase toward the front of the lamp.
A vent hole 512h penetrating the rear wall 512c is formed in the rear wall 512c of the case 512.
The vent hole 512h is located between the stepped portion 512g and the protruding portion 512d where the optical axis adjustment screw 40 is disposed in the vehicle width direction, and is located above the rotation axis Ax1 in the vertical direction.
As shown in fig. 12, the vent hole 512h is formed in a boss portion 512i protruding from the rear wall portion toward the rear of the lamp.
The vent hole 512h is composed of a through-hole portion formed in the upper half portion of the boss portion 512i and extending in the front-rear direction of the lamp, a deep hole portion opened to the rear side of the lamp in the lower half portion of the boss portion 512i, and a cutout portion formed by cutting out a part of the deep hole portion in the lower end portion of the boss portion 512 i.
A filter member 552 is attached to the rear end surface of the boss portion 512i, and the filter member 552 is formed in a short cylindrical shape with an outer diameter slightly smaller than that of the boss portion 512 i.
The filter 552 is housed so as to be fitted into an inner space of the cap 554 made of resin, and the cap 554 is attached to the rear end portion of the boss portion 512i so as to come into contact with the rear end surface of the boss portion 512 i. The ventilation hole 512 is blocked by the filter 552 in the middle of the ventilation path.
The filter 552 is configured as a sponge-like filter having air permeability. That is, the filter 552 is a porous filter in which a plurality of holes (for example, holes having a diameter of about 0.3 to 2.5 mm) are formed in a three-dimensional mesh shape.
if this filter member 552 is compared with the filter member 50 shown in fig. 11 (the filter member attached to the left side wall portion 512b of the housing 512), the filter member 50 is superior to the filter member 552 in terms of water resistance and moisture diffusion, and the filter member 552 is superior to the filter member 50 in terms of air permeability.
Fig. 14 is a rear view showing a state in which the projection lens 532 is attached to the lens holder 534 in the light distribution control unit 530 of the present embodiment. Fig. 15 is a perspective view showing an assembled state as viewed obliquely from the rear and the lower side.
As shown in these figures, the lens holder 534 has lens fastening portions 534Ab and 534Ac formed at two positions above and below the rear surface of the body portion 534A, and has positioning ribs 534Rc formed on the inner surface of the right leg portion 534R and positioning ribs 534Bc formed on the inner surface of the projection piece 534B.
As also shown in fig. 11, the lens fastening portion 534Ac on the lower side is formed as an H-shaped protrusion extending from the rear surface of the body portion 534A of the lens holder 534 toward the rear of the lamp. That is, the lens fastening portion 534Ac has a laterally long rectangular lens locking hole 534Ac1 formed in the front end portion thereof, and has a laterally long rectangular guide recess 534Ac2 formed in the rear end portion thereof.
The lens stopper 534Ab positioned on the upper side also has the same configuration as the lens stopper 534Ac, and is formed with a lens locking hole 534Ab1 and a guide concave portion 534Ab 2. However, the left-right width of the lens fastening portion 534Ab is set to a value larger than that of the lens fastening portion 534 Ac.
The positioning rib 534Rc of the right leg 534R and the positioning rib 534Bc of the projection piece 534B are formed to extend rearward of the lamp from the rear surface of the body portion 534A. At this time, as also shown in fig. 11, the positioning rib 534Bc is formed to extend longer than the positioning rib 534 Rc.
Note that, if the positioning rib 534Rc is extended to the same extent as the positioning rib 534Bc, the leg 534L is prevented from being elastically deformed when the light distribution control unit 530 is assembled to the housing 512, and therefore, the positioning rib 534Rc is formed to be short.
as shown in fig. 14 and 15, the outer peripheral flange 532B of the projection lens 532 has fastening engagement portions 532Ba and 532Bb formed at two upper and lower positions on the outer peripheral surface thereof, and rib engagement portions 532Bc and 532Bd formed at two left and right positions on the outer peripheral surface thereof.
The fastening engagement portions 532Ba and 532Bb have engagement protrusions 532Ba2 and 532Bb2 formed at the center of the cutout portions 532Ba1 and 532Bb1, respectively.
The engaging projections 532Ba2 and 532Bb2 of the fastening engaging portions 532Ba and 532Bb are formed to have a width slightly narrower than the width of the lens locking holes 534Ab1 and 534Ac1 of the lens fastening portions 534Ab and 534Ac of the lens holder 534, and as shown in fig. 11, the outer surface of the portion thereof disposed near the front of the lamp is formed in a slanted shape.
The notches 532Ba1 and 532Bb1 of the fastening engagement portions 532Ba and 532Bb are formed to have a width slightly larger than that of the lens fastening portions 534Ab and 534Ac of the lens holder 534.
The rib engagement portion 532Bc on the right side has a concave portion 532Bc2 formed in the same shape as the positioning rib 534Rc of the leg portion 534R at the center portion of the convex portion 532Bc1 formed near the inner surface of the leg portion 534R of the lens holder 534.
The rib engaging portion 532Bd positioned on the left side has a concave portion 532Bd2 having the same shape as the positioning rib 534Bc of the projection piece 534B formed below the convex portion 532Bd1 formed near the leg portion 534L of the lens holder 534 and the inner surface of the projection piece 534B.
Further, a hemispherical positioning projection 532Be is formed at three positions on the front surface of the outer peripheral flange 532B of the projection lens 532 so as to Be arranged in an L shape.
The light distribution control unit 530 is assembled by fitting the projection lens 532 into the lens holder 534 from the lamp rear side, and in this case, the projection lens 532 can be easily assembled by fitting it from the upper side in a state where the lens holder 534 is disposed slightly downward.
Specifically, when the pair of upper and lower engaging protrusions 532Ba2 and 532Bb2 of the projection lens 532 is placed along the pair of upper and lower guide recesses 534Ab2 and 534Ac2 of the lens holder 534, the left recess 532Bd2 of the projection lens 532 naturally engages with the positioning rib 534Bc of the lens holder 534. At this time, the right concave portion 532Bc2 of the projection lens 532 is not yet engaged with the positioning rib 534Rc of the lens holder 534, but when the projection lens 532 is further pressed downward in this state, the right concave portion 532Bc2 is engaged with the positioning rib 534Rc, and positioning is achieved in the vertical direction and the horizontal direction. At this time, the positioning projections 532Be formed at three positions on the front surface of the outer peripheral flange 532B of the projection lens 532 abut against the rear surface of the main body portion 534A of the lens holder 534, thereby positioning in the depth direction (i.e., the lamp front-rear direction).
Next, the operation and effects of the present embodiment will be described.
In the vehicle lamp 510 according to the present embodiment, the lens holder 534 that supports the projection lens 532 is supported by the housing 512 so as to be rotatable in the vertical direction, and therefore, the optical axis adjustment in the vertical direction can be performed in a state where the light emitting element 22 is fixed to the housing and not moved. Therefore, the vehicle lamp 510 can be made compact, and can be applied to a vehicle lamp such as a fog lamp in particular.
In the present embodiment, since the light emitting element 22 as a light source is also configured as a part of the light source unit 20, the lamp configuration can be simplified.
In this case, since the light source unit 20 is configured to be attached to the housing 512 by inserting the socket 26 into the opening 512c1 formed in the rear wall portion 512c of the housing 512 and rotating the socket 26, the light emitting element 22 can be positioned in the front-rear direction of the lamp with high accuracy.
It should be noted that the numerical values shown as the specifications in the above embodiments and the modifications thereof are merely examples, and it is obvious that they may be set to different values as appropriate.
The present invention is not limited to the configurations described in the above embodiments and modifications thereof, and various modifications other than the above may be made.

Claims (10)

1. A vehicle lamp for performing light distribution control of light from a light source by a projection lens, comprising:
A lens holder for supporting the projection lens;
A housing that supports the lens holder so as to be rotatable about a rotation axis extending in a vehicle width direction;
The light source unit includes a light emitting element, a substrate on which the light emitting element is mounted, and a socket for supporting the substrate, the light source is configured as the light emitting element in the light source unit,
The light source unit is mounted on the housing by inserting the lamp holder into an opening formed in a rear wall of the housing and rotating the lamp holder,
The housing is provided with an anti-reverse structure which prevents the light source unit from rotating from a specified mounting position to a loosening direction by abutting against the lamp holder.
2. a lamp for a vehicle as defined in claim 1,
The light emitting element is configured such that a plurality of white light emitting diodes are arranged adjacent to each other,
The light emitting element is configured such that a light emitting surface of the light emitting element extends laterally long when the light emitting unit is rotated to the predetermined mounting position.
3. The vehicular lamp according to claim 1 or 2, wherein,
The anti-reverse structure includes a contact member for contacting the socket and a fastening member for fastening the contact member to the rear wall portion of the housing.
4. The vehicular lamp according to claim 3, wherein,
The lamp holder comprises a lamp holder main body and a heat sink fixed to the lamp holder main body,
The abutting member abuts against the heat sink toward the lamp holder.
5. A vehicular lamp according to any one of claims 3 or 4,
The fastening member is constituted by a screw.
6. The vehicular lamp according to claim 5, wherein,
the screw has a threaded hole shape capable of transmitting a rotational force only in a direction of tightening the screw.
7. A lamp for a vehicle as claimed in any one of claims 4 to 6,
The abutting member includes a fastening portion fixed to a rear wall portion of the housing and a pair of arm portions extending from the fastening portion,
The contact member is configured such that the distal end surfaces of the pair of arm portions come into contact with or approach the heat sink in a state where the fastening portion is fastened to the rear wall portion of the case.
8. A lamp for a vehicle as recited in claim 7,
The heat sink includes a disc-shaped front end portion and a plurality of heat dissipation fins extending in a band-like shape toward the rear side of the lamp on the outer peripheral surface of the front end portion, the heat sink being fixed to the lamp socket body at the front end portion,
The distal end surfaces of the pair of arm portions come into contact with or approach the heat sink with respect to a pair of heat radiating fins located at circumferential ends of the plurality of heat radiating fins.
9. A lamp for a vehicle as recited in claim 8,
The contact member is configured such that the pair of arm portions extend along an outer peripheral surface of a distal end portion of the heat sink in a state where the fastening portion is fastened to the rear wall portion of the case.
10. A lamp for a vehicle as claimed in any one of claims 3 to 9,
The contact member is formed of a plate-like member made of resin.
CN201811036050.XA 2018-06-01 2018-09-06 Vehicle lamp Active CN110553216B (en)

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JP2022074954A (en) * 2020-11-05 2022-05-18 株式会社小糸製作所 Light source unit

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CN110553216B (en) 2022-04-29
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CN210860959U (en) 2020-06-26
JP6619846B2 (en) 2019-12-11

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