JP2020136096A - Lighting fixture unit - Google Patents

Abstract

To provide a lighting fixture unit with a projection lens such that even when the projection lens consists of a plurality of lenses, precision of mutual position relation among the lenses can be enhanced.SOLUTION: As a lens holder 74 supporting first and second lenses 72A, 72B arranged side by side in a unit front-rear direction, first and second positioning pins 74A1, 74A2 which extend in the unit front-rear direction are formed at two circumference places of a front end surface 74A thereof. Then the first lens 72A has first and second engagement parts 72A1, 72A2 formed to engage the first and second positioning pins 74A1, 74A2, and the second lens 72B has first and second engagement parts 72B1, 72B1 formed to engage the first and second positioning pins 74A1, 74A2. Consequently, the first and second lenses 72A, 72B are positioned on a plane orthogonal to an optical axis Ax of the projection lens 72.SELECTED DRAWING: Figure 5

Description

The present invention relates to a lamp unit including a projection lens.

Conventionally, a lamp unit configured to irradiate light from a light source toward the front of the unit via a projection lens has been known.

"Patent Document 1" describes a configuration of a projection lens in such a lamp unit including a plurality of lenses arranged side by side in the front-rear direction of the unit.

The lamp unit described in "Patent Document 1" has a configuration in which a plurality of lenses are supported by a common lens holder. At that time, these a plurality of lenses are supported by a stepped lens support portion formed on the inner peripheral surface of the lens holder and a sleeve arranged so as to abut on the outer peripheral flange portion of another lens. ing.

JP-A-2018-14256

In the lamp unit described in the above "Patent Document 1", since a plurality of lenses are supported by separate lens support portions and sleeves formed in a staircase pattern, sufficient positional relationship accuracy between the lenses is ensured. Not easy to do.

The present invention has been made in view of such circumstances, and in a lamp unit provided with a projection lens, even when the projection lens is composed of a plurality of lenses, the positional relationship between the lenses It is an object of the present invention to provide a lamp unit capable of improving accuracy.

The present invention is intended to achieve the above object by devising a support structure for a plurality of lenses on a lens holder.

That is, the lamp unit according to the present invention is
In a lamp unit configured to irradiate light from a light source toward the front of the unit through a projection lens.
The projection lens includes first and second lenses arranged side by side in the front-rear direction of the unit.
In a lamp unit configured to irradiate light from a light source toward the front of the unit through a projection lens.
The projection lens includes first and second lenses arranged side by side in the front-rear direction of the unit.
The first and second lenses are supported by a common lens holder, and are supported by a common lens holder.
The first and second positioning pins extending in the front-rear direction of the unit are formed at two locations in the circumferential direction on the first end surface of the lens holder in the front-rear direction of the unit.
Each of the first and second lenses is characterized in that first and second engaging portions that engage with the first and second positioning pins are formed.

The above-mentioned "lamp unit" may be configured such that the light emitted from the light source is directly incident on the projection lens, or the emitted light from the light source is incident on the projection lens via another optical member. You may.

The specific shape, material, and the like of each of the above "first and second lenses" are not particularly limited.

The specific shape, material, etc. of the above "lens holder" are not particularly limited.

The "first end face" may be the front end face or the rear end face of the lens holder.

As long as the "first and second positioning pins" are formed at two positions in the circumferential direction on the first end surface of the lens holder, the specific forming positions thereof are not particularly limited. Further, the "first and second positioning pins" may be formed integrally with the lens holder, or a part of a member formed separately from the lens holder is embedded in the lens holder. It may be formed.

The specific shape of the "first and second engaging portions" is not particularly limited as long as it is configured to engage with the first and second positioning pins.

The lamp unit according to the present invention includes first and second lenses arranged side by side in the front-rear direction of the unit as its projection lens, and a lens holder supporting these includes a first end surface in the front-rear direction of the unit. First and second positioning pins extending in the front-rear direction of the unit are formed at two locations in the circumferential direction, while the first and second lenses are engaged with the first and second positioning pins, respectively. Since the first and second engaging portions are formed, the following effects can be obtained.

That is, each of the first and second lenses is positioned in a plane orthogonal to the optical axis of the projection lens by the engagement of the first and second engaging portions with the first and second positioning pins of the lens holder. Therefore, the positional relationship accuracy of the first and second lenses can be improved with respect to the direction orthogonal to the optical axis of the projection lens.

As described above, according to the present invention, in the lamp unit provided with the projection lens, the accuracy of the positional relationship between the lenses can be improved even when the projection lens is composed of a plurality of lenses.

Moreover, by adopting such a configuration, it is not necessary to form a stepped lens support portion on the inner peripheral surface of the lens holder, whereby the outer diameter shape of the lens holder can be reduced.

In the above configuration, each of the first and second lenses includes a positioning hole in which the first engaging portion engages with the first positioning pin, and the second engaging portion engages with the second positioning pin. If it is composed of matching positioning grooves, the following effects can be obtained.

That is, each of the first and second lenses is positioned in the translational direction in a plane orthogonal to the optical axis of the projection lens by engaging the positioning hole with the first positioning pin, and then the positioning groove and the first lens are positioned. Since the positioning in the rotation direction centering on the first positioning pin is performed by engaging with the two positioning pins, the optical axis of the projection lens and the optical axis of the projection lens do not need to be strictly controlled between the first and second positioning pins. The positional relationship accuracy of the first and second lenses can be improved in the orthogonal directions.

In the above configuration, each of the first and second positioning pins is further composed of a stepped pin having a small diameter portion and a large diameter portion formed in a stepped shape, and then the first and second positioning pins formed on the first lens. The second engaging portion engages with the small diameter portions of the first and second positioning pins, and the first and second engaging portions formed on the second lens engage with the large diameter portions of the first and second positioning pins. If it is configured to engage, it is possible to easily control the dimensions when forming the first and second positioning pins.

In the above configuration, lens support portions for supporting the second lens are further formed at a plurality of points in the circumferential direction on the first end surface of the lens holder, and outer peripheral flange portions are formed on each of the first and second lenses. The first lens is arranged with its outer peripheral flange portion in contact with the outer peripheral flange portion of the second lens, and the second lens supports the outer peripheral flange portion of the lens holder with the lens holder. If the configuration is arranged so as to be in contact with the portion, the positional relationship accuracy of the first and second lenses can be improved also in the front-rear direction of the unit.

In the above configuration, the projection lens is further provided with a third lens supported by the lens holder in a state of being arranged side by side in the front-rear direction of the unit with respect to the first and second lenses. In the lens holder, the third and fourth positioning pins are formed at two points in the circumferential direction on the second end surface opposite to the first end surface, and the third lens engages with the third and fourth positioning pins. If the configuration is such that the fourth engaging portion is formed, the positional relationship accuracy between the first and second lenses and the third lens can be ensured without increasing the outer diameter shape of the lens holder.

In the above configuration, the lamp unit according to the present invention is further provided with a spatial light modulator that reflects the light emitted from the light source toward the projection lens, or a micro LED that emits direct light toward the projection lens as a light source. In the case of a configuration equipped with an array, it is important to improve the positional relationship accuracy between the spatial optical modulator or the micro LED array and the projection lens in order to fully exert the optical function as the lamp unit. , It is particularly effective to adopt the configuration of the present invention.

The specific configuration of the above-mentioned "spatial light modulator" is not particularly limited as long as it can control the spatial distribution of the reflected light when reflecting the light from the light source. However, for example, one using a digital micromirror or one using a reflective liquid crystal can be adopted.

Side sectional view showing a vehicle lamp provided with a lamp unit according to an embodiment of the present invention. Perspective view showing the above lamp unit Top view showing the above lamp unit Front view showing the lens side sub-assy of the above lamp unit taken out. VV line sectional view of FIG. Perspective view showing the above lens side sub-assy disassembled 5 is a detailed view of the main part, FIG. 5A is a detailed view of the VIIa part of FIG. 5, FIG. 5B is a detailed view of the VIIb part of FIG. 5, and FIG. 5C is a detailed view of the VIIc part of FIG. Is a detailed view of the VIId part of FIG. (A) is a front view showing an enlarged main part of the lens side sub-assy, and (b) is a view similar to (a) showing a modified example of the above embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a side sectional view showing a vehicle lamp 100 provided with a lamp unit 10 according to an embodiment of the present invention. Further, FIG. 2 is a perspective view showing the lamp unit 10, and FIG. 3 is a plan view showing the lamp unit 10.

In these figures, the direction indicated by X is the "front of the unit", the direction indicated by Y is the "left direction" orthogonal to the "front of the unit" ("right direction" when viewed from the front of the unit), and the direction indicated by Z. Is "upward". The same applies to figures other than these.

The vehicle lamp 100 is a headlamp provided at the front end of the vehicle, and the lamp unit 10 is oriented in the front-rear direction (that is, the unit front-rear direction) in the lamp chamber formed by the lamp body 102 and the translucent cover 104. It is configured to be housed in a state where the optical axis is adjusted so as to match the front-rear direction of the vehicle.

The lamp unit 10 includes a spatial light modulation unit 20, a light source side sub-assy 50, and a lens-side sub-assy 70. The lamp unit 10 is supported by the lamp body 102 via a mounting structure (not shown) in the bracket 40 that forms a part of the spatial light modulation unit 20.

The spatial light modulation unit 20 includes a spatial light modulator 30, a support substrate 22 arranged on the rear side of the unit with respect to the spatial light modulator 30, and a heat sink 24 arranged on the rear side of the unit with respect to the support substrate 22. The bracket 40 is provided on the front side of the unit with respect to the spatial light modulator 30.

The bracket 40 is a metal member, and has a vertical surface portion 40A extending along a vertical surface orthogonal to the front-rear direction of the unit and a horizontal surface portion extending along a substantially horizontal plane from the lower end edge of the vertical surface portion 40A toward the front of the unit. It is equipped with 40B.

The light source side subassie 50 includes a pair of left and right light sources (specifically, light emitting diodes) 52 mounted on the substrate 56, and a reflector 54 that reflects the light emitted from these light sources 52 toward the spatial light modulation unit 20. A base member 60 that supports these is provided, and the base member 60 is supported by the horizontal surface portion 40B of the bracket 40. At that time, the reflecting surface of the reflector 54 is configured to converge the light emitted from each light source 52 in the vicinity of the posterior focal point F (see FIG. 1) of the projection lens 72.

The lens-side sub-assess 70 includes a projection lens 72 having an optical axis Ax extending in the front-rear direction of the unit, and a lens holder 74 that supports the projection lens 72. In the lens holder 74, the horizontal surface portion 40B of the bracket 40 It is supported.

A heat sink 80 and a heat radiating fan 82 for dissipating heat generated by lighting of each light source 52 are arranged on the unit front side of the light source side sub-assy 50 and on the lower side of the lens-side sub-assy 70. .. The heat sink 80 is connected to the heat transfer plate 62 of the light source side subassy 50 via a heat transfer plate 84 and a pair of left and right heat pipes 86.

Then, the lamp unit 10 irradiates the light from each light source 52 reflected by the reflector 54 toward the front of the unit via the spatial light modulator 30 and the projection lens 72, so that various light distribution patterns (for example, low beam) are emitted. A light distribution pattern for high beams, a light distribution pattern for high beams, a light distribution pattern that changes according to the vehicle running conditions, and a light distribution pattern that draws characters, symbols, etc. on the road surface in front of the vehicle) can be formed with high accuracy. There is.

The spatial optical modulator 30 is a digital micromirror device (DMD), and includes a reflection control unit 30A in which a plurality of reflecting elements (specifically, hundreds of thousands of micromirrors) are arranged in a matrix. The reflection control unit 30A is arranged so as to be located on the vertical plane orthogonal to the optical axis Ax at the rear focal point F of the projection lens 72. Then, the spatial light modulator 30 controls the angle of each reflecting surface of the plurality of reflecting elements constituting the reflection control unit 30A, so that the left and right pairs are reflected by the reflector 54 and reach each reflecting element. Select either the direction in which the light from the light source 52 is directed toward the projection lens 72 (the direction indicated by the solid line in FIG. 1) or the direction away from the projection lens 72 (the direction indicated by the two-point chain line in FIG. 1). It is designed to be reflected.

The support substrate 22 is arranged so as to extend along a vertical plane orthogonal to the optical axis Ax, and a conductive pattern (not shown) is formed on the front surface thereof. The spatial light modulator 30 is electrically connected to the support substrate 22 via the socket 26.

The spatial light modulation unit 20 has a configuration in which the spatial light modulator 30 is supported from both sides in the front-rear direction of the unit by a vertical facing portion 40A of the bracket 40 and a heat sink 24. A plate-shaped member 32 and a gasket 34 are arranged between the vertical facing portion 40A of the bracket 40 and the spatial light modulator 30, and the transparent cover 36 is supported by the vertical facing portion 40A of the bracket 40.

Next, a specific configuration of the lens-side sub-assy 70 will be described.

FIG. 4 is a front view showing the lens-side sub-assy 70 taken out from the lamp unit 10, and FIG. 5 is a sectional view taken along line VV of FIG. Further, FIG. 6 is a perspective view showing the lens side sub-assess 70 in an exploded manner.

As shown in these figures, the projection lens 72 is composed of first, second and third lenses 72A, 72B and 72C arranged side by side in the front-rear direction of the unit on the optical axis Ax.

The first lens 72A located most on the front side of the unit is configured as a plano-convex lens bulging toward the front of the unit, and the second lens 72B located in the center is configured as a biconcave lens, and is configured on the rearmost side of the unit. The third lens 72C located at is configured as a biconvex lens.

The first to third lenses 72A to 72C are all made of resin lenses. Specifically, the first and third lenses 72A and 72C are made of acrylic resin, and the second lens 72B is made of polycarbonate resin.

The first to third lenses 72A to 72C have a configuration in which the upper end portion thereof is slightly cut off along the horizontal plane and the lower portion thereof is cut off relatively large along the horizontal plane. The first to third lenses 72A to 72C are supported by a common lens holder 74 at the outer peripheral edge thereof (this will be described later).

The lens holder 74 is a member made of metal (for example, made of aluminum die-cast), and has a holder body 74A formed so as to surround the projection lens 72 in a tubular shape, and both left and right sides from the lower end of the outer peripheral surface of the holder body 74A. It is provided with a pair of left and right leg portions 74B formed so as to overhang.

The first metal fitting 76A is attached to the holder body 74A from the front side of the unit, and the second metal fitting 76B is attached from the rear side of the unit, whereby the first to third lenses 72A to 72C are fixed to the holder body 74A. (This will also be described later).

The pair of left and right legs 74B are formed so that their tips extend along a horizontal plane. At the tip of each leg 74B, a pair of front and rear elongated holes 74Ba (see FIG. 6) extending in the front-rear direction of the unit are formed. The lens holder 74 is fixed to the bracket 40 in a state where the position in the front-rear direction of the unit is finely adjusted by screwing the lens holder 74 to the horizontal surface portion 40B of the bracket 40 in these elongated holes 74Ba.

A pair of left and right outer peripheral flange portions 72Ac, 72Bc, and 72Cc are formed on the outer peripheral edges of the first, second, and third lenses 72A, 72B, and 72C that form the projection lens 72, respectively.

The outer peripheral flange portions 72Ac to 72Cc are formed so as to extend with a constant width along the outer peripheral peripheral portions of the first to third lenses 72A to 72C, and project in a flat plate shape in a direction orthogonal to the optical axis Ax. There is. At that time, in the second lens 72B configured as a biconcave lens, a pair of left and right outer peripheral flange portions 72Bc are formed at the front end position of the outer peripheral surface thereof.

The first and second lenses 72A and 72B are supported by the front end surface 74Aa of the holder body 74A in a state where a pair of left and right outer peripheral flange portions 72Ac and 72Bc are overlapped with respect to the lens holder 74. The three lenses 72C are supported by the rear end surface 74Ab of the holder body 74A in a pair of left and right outer peripheral flange portions 72Cc.

The holder body 74A is formed with first and second positioning pins 74A1 and 74A2 extending toward the front of the unit at two locations in the circumferential direction on the front end surface 74Aa, and at two locations in the circumferential direction on the rear end surface 74Ab. , Third and fourth positioning pins 74A3, 74A4 extending toward the rear of the unit are formed.

The first and second positioning pins 74A1 and 74A2 are located on the horizontal plane including the optical axis Ax on both the left and right sides of the optical axis Ax, and the third and fourth positioning pins 74A3 and 74A4 are also located on both the left and right sides of the optical axis Ax. Is located on the horizontal plane including the optical axis Ax.

7A and 7B are detailed views of the main parts of FIG. 5, FIG. 7A is a detailed view of the VIIa part of FIG. 5, FIG. 7B is a detailed view of the VIIb part of FIG. 5, and FIG. 7C is a diagram. 5 is a detailed view of the VIIc part, and FIG. 7D is a detailed view of the VIId part of FIG. Further, FIG. 8A is an enlarged front view showing a main part of the lens side sub-assy 70.
As shown in FIGS. 7 (a) and 8 (a), the first positioning pin 74A1 located on the right side (left side when viewed from the front of the lamp unit) on the front end surface 74Aa of the holder body 74A has a small diameter portion 74A1A on the tip side. The large diameter portion 74A1B on the base end side is composed of a stepped pin formed in a stepped shape. At that time, both the small diameter portion 74A1A and the large diameter portion 74A1B are formed so as to have a circular cross-sectional shape and slightly tapered, and the connecting portion thereof is formed in a conical surface shape. Further, the tip surface of the small diameter portion 74A1A has a surface shape close to a spherical surface.

As shown in FIGS. 7 (b) and 8 (a), the second positioning pin 74A2 located on the left side of the front end surface 74Aa of the holder body 74A also has a small diameter portion 74A2A and a large diameter portion 74A2B formed in a stepped shape. It consists of stepped pins. The specific shape of the second positioning pin 74A2 is the same as that of the first positioning pin 74A1.

As shown in FIGS. 7 (c) and 7 (d), the third and fourth positioning pins 74A3 and 74A4 are each formed to have a circular cross-sectional shape and slightly tapered, and the tip surface thereof is spherical. It has a surface shape close to.

On the other hand, as shown in FIGS. 7A and 8A, a first engaging portion 72A1 that engages with the first positioning pin 74A1 is formed on the outer peripheral flange portion 72Ac on the right side of the first lens 72A. ing.

The first engaging portion 72A1 is composed of a substantially cylindrical positioning hole that engages with the small diameter portion 74A1A of the first positioning pin 74A1. At that time, the first engaging portion 72A1 is formed so that the inner diameter gradually decreases toward the rear of the unit, and the inner diameter of the rear edge thereof is the base end portion of the small diameter portion 74A1A of the first positioning pin 74A1. It is set to almost the same value as the outer diameter.

As shown in FIGS. 7B and 8A, a second engaging portion 72A2 that engages with the second positioning pin 74A2 is formed on the outer peripheral flange portion 72Ac on the left side of the first lens 72A. ..

The second engaging portion 72A2 is composed of a positioning groove that engages with the small diameter portion 74A2A of the second positioning pin 74A2. At that time, the second engaging portion 72A2 is formed so as to extend from the position on the right side of the small diameter portion 74A2A toward the left, and the vertical width is gradually narrowed toward the rear of the unit. ing. The vertical width of the rear end edge of the second engaging portion 72A2 is set to substantially the same value as the outer diameter of the base end portion of the small diameter portion 74A2A of the second positioning pin 74A2.

Further, as shown in FIG. 7A, a first engaging portion 72B1 that engages with the first positioning pin 74A1 is formed on the outer peripheral flange portion 72Bc on the right side of the second lens 72B.

The first engaging portion 72B1 is composed of a substantially cylindrical positioning hole that engages with the large diameter portion 74A1B of the first positioning pin 74A1. At that time, the first engaging portion 72B1 is formed so that the inner diameter gradually decreases toward the rear of the unit, and the inner diameter of the trailing edge is the base end portion of the large diameter portion 74A1B of the first positioning pin 74A1. It is set to almost the same value as the outer diameter of the neighboring part.

As shown in FIG. 7B, a second engaging portion 72B2 that engages with the second positioning pin 74A2 is formed on the left outer peripheral flange portion 72Bc of the second lens 72B.

The second engaging portion 72B2 is composed of a positioning groove that engages with the large diameter portion 74A2B of the second positioning pin 74A2. At that time, the second engaging portion 72B2 is formed so as to extend from the position on the right side of the large diameter portion 74A2B toward the left, and the vertical width is gradually narrowed toward the rear of the unit. Has been done. The vertical width of the rear end edge of the second engaging portion 72B2 is set to substantially the same value as the outer diameter of the portion near the base end portion of the large diameter portion 74A2B of the second positioning pin 74A2.

As shown in FIG. 7C, a third engaging portion 72C3 that engages with the third positioning pin 74A3 is formed on the outer peripheral flange portion 72Cc on the right side of the third lens 72C.

The third engaging portion 72C3 is composed of a substantially cylindrical positioning hole that engages with the third positioning pin 74A3. At that time, the third engaging portion 72C3 is formed so that the inner diameter gradually decreases toward the front of the unit, and the inner diameter of the front end edge thereof is the outer diameter of the portion near the base end portion of the third positioning pin 74A3. It is set to almost the same value as.

As shown in FIG. 7D, a fourth engaging portion 72C4 that engages with the fourth positioning pin 74A4 is formed on the outer peripheral flange portion 72C on the left side of the third lens 72C.

The fourth engaging portion 72C4 is composed of a positioning groove that engages with the fourth positioning pin 74A4. At that time, the fourth engaging portion 72C4 is formed so as to extend from the position on the right side of the fourth positioning pin 74A4 toward the left, and the vertical width gradually narrows toward the front of the unit. It is formed. The vertical width of the front end edge of the fourth engaging portion 72C4 is set to substantially the same value as the outer diameter of the portion near the base end portion of the fourth positioning pin 74A4.

The front end surface 74Aa of the holder body 74A is formed with the peripheral regions of the first and second positioning pins 74A1 and 74A2 recessed. Further, the rear end surface 74Ab of the holder body 74A is formed in a state where the peripheral regions of the third and fourth positioning pins 74A3 and 74A4 are recessed.

As shown in FIGS. 4 and 6, the holder body 74A of the lens holder 74 supports the second lens 72B at a plurality of locations (specifically, three locations on each of the left and right sides) in the circumferential direction on the front end surface 74Aa. The lens support portion 74Aa1 for this purpose is formed.

Each lens support portion 74Aa1 is formed in a state of protruding toward the front side of the unit on the front end surface 74Aa of the holder body 74A, and the tip surface thereof is located on the same vertical plane orthogonal to the optical axis Ax.

As shown in FIG. 6, the second lens 72B is arranged in a state in which a pair of left and right outer peripheral flange portions 72Bc are in contact with three pairs of left and right lens support portions 74Aa1. Further, the first lens 72A is arranged in a state in which a pair of left and right outer peripheral flange portions 72Ac are in contact with a pair of left and right outer peripheral flange portions 72Bc of the second lens 72B.

The first metal fitting 76A is arranged in a state of being in contact with the pair of left and right outer peripheral flange portions 72Ac of the first lens 72A from the front side of the unit, whereby the first and second lenses 72A and 72B are placed in contact with each other. It is designed to be positioned in the front-rear direction of the unit.

On the other hand, in the holder body 74A of the lens holder 74, lens support portions 74Ab1 for supporting the third lens 72C are formed at a plurality of locations in the circumferential direction (specifically, three locations on each of the left and right sides) on the rear end surface 74Ab. Has been done.

Each lens support portion 74Ab1 is formed in a state of protruding toward the rear side of the unit on the rear end surface 74Ab of the holder body 74A, and the front end surface thereof is located on the same vertical plane orthogonal to the optical axis Ax.

The third lens 72C is arranged in a state where a pair of left and right outer peripheral flange portions 72Cc are in contact with the three pairs of left and right lens support portions 74Ab1.

The second metal fitting 76B is arranged in a state of being in contact with the pair of left and right outer peripheral flange portions 72Cc of the third lens 72C from the rear side of the unit, whereby the third lens 72C is positioned in the front-rear direction of the unit. It is designed to do.

As shown in FIGS. 1 and 6, the holder body 74A of the lens holder 74 is formed with a pair of front and rear openings 74Ac on the upper and lower side wall portions thereof. Each opening 74Ac has a substantially horizontally long rectangular opening shape.

The first and second metal fittings 76B are formed by bending a metal plate.

The first metal fitting 76A is formed in a frame shape so as to surround the first lens 72A in a vertical plane orthogonal to the optical axis Ax, and a pair of upper and lower metal fittings 76A extends substantially horizontally toward the rear of the unit at both upper and lower ends thereof. A flange portion 76Aa is formed. The distance between the upper and lower pair of flange portions 76Aa is set to substantially the same value as the height dimension of the holder main body 74A. Each flange portion 76Aa is formed with a raised portion 76Ab cut up on the optical axis Ax side. Further, the base end portion of each flange portion 76Aa is formed in a corrugated plate shape.

Then, the outer peripheral flange portion 72Bc of the second lens 72B is brought into contact with the lens support portion 74Aa1 formed on the front end surface 74Aa of the holder body 74A, and the outer peripheral flange portion 72Bc of the second lens 72B is brought into contact with the outer peripheral flange portion 72Bc of the first lens 72A. With the flange portion 72Ac in contact with the outer peripheral flange portion 72Ac of the first lens 72A and the first metal fitting 76A in contact with the unit front side, a pair of upper and lower raised portions 76Ab are brought into contact with each other. By locking the opening 74Ac located on the front side of the unit on the upper and lower double-sided wall portions of the holder body 74A, the first and second lenses 72A and 72B can be assembled to the lens holder 74. There is.

At the time of this assembly, the first metal fitting 76A presses the first and second lenses 72A and 72B toward the lens holder 74 side by elastically deforming the base end portion of each flange portion 76Aa formed in the corrugated plate shape. As a result, each raised portion 76Ab is securely locked to each opening 74Ac.

A pair of left and right notch portions 76Ac are formed on the inner peripheral surface of the first metal fitting 76A, so that the tip portions of the first and second positioning pins 74A1 and 74A2 are the first to be formed during the above assembly. 1 It is designed to prevent interference with the metal fitting 76A.

On the other hand, the second metal fitting 76B is formed in a frame shape so as to surround the third lens 72C in a vertical plane orthogonal to the optical axis Ax, and the upper and lower ends 1 thereof extend substantially horizontally toward the front of the unit. A pair of flange portions 76Ba is formed.

Also in the second metal fitting 76B, each flange portion 76Ba is formed with a raised portion 76Bb cut up on the optical axis Ax side, and the base end portion of each flange portion 76Ba is formed in a corrugated shape. There is. Further, a pair of left and right notch portions 76Bc are formed on the inner peripheral surface of the second metal fitting 76B to prevent interference with the third and fourth positioning pins 74A3 and 74A4.

Next, the operation of this embodiment will be described.

The lamp unit 10 according to the present embodiment includes first and second lenses 72A and 72B arranged side by side in the front-rear direction of the unit as its projection lens 72, and the lens holder 74 supporting these includes the first and second lenses 72A and 72B. The first and second positioning pins 74A1 and 74A2 extending in the front-rear direction of the unit are formed at two points in the circumferential direction on the front end surface 74Aa (the first end face in the front-rear direction of the unit), while the first and second lenses 72A. , 72B each has first and second engaging portions 72A1, 72A2, 72B1 and 72B2 that engage with the first and second positioning pins 74A1 and 74A2, and thus has the following effects. Obtainable.

That is, each of the first and second lenses 72A and 72B engages the first and second engaging portions 72A1, 72A2, 72B1 and 72B with the first and second positioning pins 74A1 and 74A2 of the lens holder 74. Therefore, positioning is performed in a plane orthogonal to the optical axis Ax of the projection lens 72, so that the positional relationship accuracy of the first and second lenses 72A and 72B can be improved in the direction orthogonal to the optical axis Ax of the projection lens 72. it can.

As described above, according to the present embodiment, in the lamp unit 10 provided with the projection lens 72, even when the projection lens 72 is composed of a plurality of lenses, the accuracy of the positional relationship between the lenses can be improved. it can.

In particular, the lamp unit 10 according to the present embodiment has a configuration including a spatial light modulator 30 that reflects the light emitted from the light source 52 toward the projection lens 72, and the spatial light modulator 30 and the projection lens. It is particularly effective to adopt the configuration of the present embodiment because it is important to improve the accuracy of the positional relationship with the 72 in order to fully exert the optical function of the lamp unit 10.

Moreover, by adopting the configuration of the present embodiment, it is not necessary to form a stepped lens support portion on the inner peripheral surface of the lens holder 74, whereby the outer diameter shape of the lens holder 74 can be reduced.

Further, in the present embodiment, as the respective configurations of the first and second lenses 72A and 72B, the first engaging portions 72A1 and 72B1 are configured by positioning holes that engage with the first positioning pin 74A1 and the second Since the engaging portions 72A2 and 72B2 are composed of positioning grooves that engage with the second positioning pin 74A2, the following effects can be obtained.

That is, each of the first and second lenses 72A and 72B is a plane orthogonal to the optical axis Ax of the projection lens 72 due to the engagement between the first engaging portions 72A1 and 72B1 as the positioning holes and the first positioning pin 74A1. After positioning in the translational direction inside, positioning in the rotation direction centering on the first positioning pin 74A1 is performed by engaging the second engaging portions 72A2, 72B2 as the positioning groove with the second positioning pin 74A2. Therefore, the positions of the first and second lenses 72A and 72B with respect to the direction orthogonal to the optical axis Ax of the projection lens 72 without strictly controlling the distance between the first and second positioning pins 74A1 and 74A2. Relationship accuracy can be improved.

Further, in the present embodiment, each of the first and second positioning pins 74A1 and 74A2 is composed of a stepped pin in which the small diameter portions 74A1A and 74A2A and the large diameter portions 74A1B and 74A2B are formed in a stepped shape. Then, the first and second engaging portions 72A1 and 72A2 formed on the first lens 72A engage with the small diameter portions 74A1A and 74A2A of the first and second positioning pins 74A1 and 74A2, and the second lens 72B. Since the first and second engaging portions 72B1 and 72B2 formed in the above are engaged with the large diameter portions 74A1B and 74A2B of the first and second positioning pins 74A1 and 74A2, the first and second positioning pins 74A1 and Dimension control when forming the 74A2 can be easily performed.

Further, in the present embodiment, lens support portions 74Aa1 for supporting the second lens 72B are formed at a plurality of points in the circumferential direction on the front end surface 74Aa of the lens holder 74, and the first and second lenses 72A and 72B are formed. Outer peripheral flange portions 72Ac and 72Bc are formed on the outer peripheral flange portions 72Ac and 72Bc, respectively, and the first lens 72A is arranged on the outer peripheral flange portion 72A in a state of being in contact with the outer peripheral flange portion 72Bc of the second lens 72B. Since the second lens 72Bc is arranged with its outer peripheral flange portion 72Bc in contact with the lens support portion 74Aa1 of the lens holder 74, the positional relationship accuracy of the first and second lenses 72A and 72B also in the front-rear direction of the unit. Can be enhanced.

Further, in the present embodiment, as the projection lens 72, a third lens 72C supported by the lens holder 74 in a state of being arranged side by side with respect to the first and second lenses 72A and 72B in the front-rear direction of the unit is provided. On top of that, the third and fourth positioning pins 74A3 and 74A4 are formed at two points in the circumferential direction on the rear end surface 74Ab (second end surface opposite to the first end surface) of the lens holder 74, and the third Since the third and fourth engaging portions 72C3 and 72C4 that engage with the third and fourth positioning pins 74A3 and 74A4 are formed on the lens 72C, the first one without increasing the outer diameter shape of the lens holder 74. And the positional relationship accuracy between the second lenses 72A and 72B and the third lens 72C can be ensured.

In the above embodiment, each of the first and second positioning pins 74A1 and 74A2 has been described as having a stepped pin, but it is also possible to adopt one having a normal non-stepped pin. It is possible.

In the above embodiment, it has been described that the outer peripheral flange portion 72Ac of the first lens 72A and the outer peripheral flange portion 72Bc of the second lens 72B are in direct contact with each other, but a configuration in which the outer peripheral flange portion 72Bc of the first lens 72A is in direct contact with each other is configured. It is also possible to adopt it.

In the above embodiment, a plurality of lenses (that is, the first and second lenses 72A and 72B) are supported on the front end surface 74Aa of the lens holder 74, while a single lens (that is, that is) is supported on the rear end surface 74Ab of the lens holder 74. Although it has been described that the third lens 72C) is supported, a configuration in which a plurality of lenses are also supported on the rear end surface 74Ab of the lens holder 74 (for example, a total of four lenses with two front and rear lenses). Is also possible. At that time, by adopting the same lens support structure as the lens support structure of the front end surface 74Aa on the rear end surface 74Ab, it is possible to obtain the same action and effect.

In the above embodiment, the vehicle lamp 100 is a headlamp provided at the front end of the vehicle, and the configuration in which the lamp unit 10 is housed in the lamp chamber has been described. However, other than this, for example, the headlamp The lamp unit 10 may be applied to the road surface drawing lamp installed at the lower bumper position, or the lamp unit 10 may be applied to the road surface drawing lamp installed at the rear end of the vehicle body. It is possible.

In the above embodiment, the lamp unit 10 has been described as being a vehicle-mounted lighting unit, but it can also be used for applications other than vehicle-mounted.

Next, a modified example of the above embodiment will be described.

FIG. 8B is a diagram similar to FIG. 8A showing a main part of the lens-side sub-assy 170 according to this modification.

The basic configuration of this modification is the same as that of the above embodiment, but the configurations of the first and second lenses 172A and 172B are partially different from those of the above embodiment.

That is, also in the first lens 172A of this modified example, the first engaging portion 172A1 that engages with the first positioning pin 74A1 of the lens holder 74 is provided on the outer peripheral flange portion 172Ac on the right side (left side when viewed from the front of the lamp unit). Along with the formation, a second engaging portion 172A2 that engages with the second positioning pin 74A2 of the lens holder 74 is formed on the outer peripheral flange portion 172Ac on the left side, but the first and second engaging portions 172A1 and 172A2 are formed. Is different from the case of the above embodiment in that both are composed of positioning grooves.

Specifically, the second engaging portion 172A2 is formed so as to extend from a position on the right side of the small diameter portion 74A2A of the second positioning pin 74A2 toward the left, similarly to the second engaging portion 72A2 of the above embodiment. However, the position of the right end edge thereof is set to a position closer to the small diameter portion 74A2A of the second positioning pin 74A2 than in the case of the above embodiment.

The second engaging portion 172A2 is formed so that the vertical width gradually narrows toward the rear of the unit, and the vertical width of the rear edge thereof is the base end portion of the small diameter portion 74A2A of the second positioning pin 74A2. The point that the value is set to substantially the same value as the outer diameter is the same as in the case of the above embodiment.

On the other hand, the first engaging portion 172A1 has a shape symmetrical with that of the second engaging portion 172A2 with respect to the vertical plane including the optical axis Ax.

As a result, the first lens 172A of the present modification is in the vertical and horizontal directions with respect to the lens holder 74 even though the first and second engaging portions 172A1 and 172A2 are both configured by the positioning groove. It is designed to be maintained in a well-positioned state.

Regarding the above points, the second lens 172B also has the same configuration as the first lens 172A.

Even when the configuration of this modification is adopted, the positional relationship accuracy of the first and second lenses 172A and 172B can be improved in the direction orthogonal to the optical axis Ax.

Further, when the configuration of this modification is adopted, it is necessary to strictly control the distance between the first and second positioning pins 74A1 and 74A2 as compared with the case of the above embodiment. Since both the first and second engaging portions 172A1 and 172A2 are formed of positioning grooves, engagement with the first and second positioning pins 74A1 and 74A2 can be easily performed, whereby the first and second engaging portions 172A1 and 172A2 can be easily engaged with the lens holder 74. One lens 172A can be easily attached. The same applies to the second lens 172B in this respect.

It should be noted that the numerical values shown as specifications in the above-described embodiment and its modified examples are only examples, and it goes without saying that these may be set to different values as appropriate.

Further, the present invention is not limited to the configurations described in the above-described embodiment and its modifications, and configurations to which various other modifications are added can be adopted.

10 Lighting unit 20 Spatial light modulation unit 22 Support board 24 Heat sink 26 Socket 30 Spatial light modulator 30A Reflection control unit 32 Plate-shaped member 34 Gasket 36 Translucent cover 40 Bracket 40A Vertical facing part 40B Horizontal surface part 50 Light source side sub-assess 52 Light source 54 Reflector 56 Substrate 60 Base member 62, 84 Heat transfer plate 70, 170 Lens side sub-assess 72 Projection lens 72A, 172A First lens 72Ac, 72Bc, 72Cc, 172Ac Outer flange part 72A1, 72B1, 172A1 First engagement part 72A2, 72B2, 172A2 2nd engaging part 72B, 172B 2nd lens 72C 3rd lens 72C3 3rd engaging part 72C4 4th engaging part 74 Lens holder 74A Holder body 74Aa Front end face (1st end face)
74Aa1, 74Ab1 Lens support 74Ab Rear end face (second end face)
74Ac Opening 74A1 1st positioning pin 74A1A, 74A2A Small diameter part 74A1B, 74A2B Large diameter part 74A2 2nd positioning pin 74A3 3rd positioning pin 74A4 4th positioning pin 74B Leg 74Ba Long hole 76A 1st metal fitting 76Aa, 76Ba Flange part 76A , 76Bb Notch 76Ac, 76Bc Notch 76B 2nd metal fitting 80 Heat sink 82 Heat dissipation fan 86 Heat pipe 100 Vehicle lighting equipment 102 Lamp body 104 Translucent cover Ax Optical axis F Rear focus

That is, the lamp unit according to the present invention is
In a lamp unit configured to irradiate light from a light source toward the front of the unit through a projection lens.
The projection lens includes first and second lenses arranged side by side in the front-rear direction of the unit .
The first and second lens upper SL is supported on a common lens holder,
The first and second positioning pins extending in the front-rear direction of the unit are formed at two locations in the circumferential direction on the first end surface of the lens holder in the front-rear direction of the unit.
Each of the first and second lenses is characterized in that first and second engaging portions that engage with the first and second positioning pins are formed.

The first and second metal fittings 76A and 76B are formed by bending a metal plate.

Claims (6)

In a lamp unit configured to irradiate light from a light source toward the front of the unit through a projection lens.
The projection lens includes first and second lenses arranged side by side in the front-rear direction of the unit.
The first and second lenses are supported by a common lens holder, and are supported by a common lens holder.
The first and second positioning pins extending in the front-rear direction of the unit are formed at two locations in the circumferential direction on the first end surface of the lens holder in the front-rear direction of the unit.
A lamp unit characterized in that each of the first and second lenses is formed with first and second engaging portions that engage with the first and second positioning pins. The first engaging portion is composed of a positioning hole that engages with the first positioning pin.
The lighting equipment unit according to claim 1, wherein the second engaging portion is composed of a positioning groove that engages with the second positioning pin. Each of the first and second positioning pins is composed of a stepped pin in which a small diameter portion and a large diameter portion are formed in a stepped shape.
The first and second engaging portions formed on the first lens are engaged with the small diameter portions of the first and second positioning pins.
The lamp according to claim 1 or 2, wherein the first and second engaging portions formed on the second lens are engaged with the large diameter portions of the first and second positioning pins. unit. Lens support portions for supporting the second lens are formed at a plurality of points in the circumferential direction on the first end surface of the lens holder.
An outer peripheral flange portion is formed on each of the first and second lenses.
The first lens is arranged in a state where the outer peripheral flange portion of the first lens is in contact with the outer peripheral flange portion of the second lens.
The lamp unit according to any one of claims 1 to 3, wherein the second lens is arranged in a state where the outer peripheral flange portion of the second lens is in contact with the lens support portion. The projection lens includes a third lens supported by the lens holder in a state of being arranged side by side in the front-rear direction of the unit with respect to the first and second lenses.
Third and fourth positioning pins extending in the front-rear direction of the unit are formed at two locations in the circumferential direction on the second end surface of the lens holder opposite to the first end surface.
The lighting unit according to any one of claims 1 to 4, wherein the third lens is formed with third and fourth engaging portions that engage with the third and fourth positioning pins. Claim 1 is characterized by comprising a spatial light modulator that reflects light emitted from the light source toward the projection lens or a micro LED array that emits direct light toward the projection lens as the light source. ~ 5 The lighting unit described in any one of them.

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