JP6205645B2 - Vehicle lighting - Google Patents

Description

  The present invention relates to a vehicular lamp, and more particularly to a lens-directed vehicular lamp that allows light from a semiconductor light source to enter a lens and irradiate the front of the vehicle or the like as a light distribution pattern from the lens.

  This type of vehicular lamp is conventionally known (see, for example, Patent Document 1).

  The conventional vehicular lamp of Patent Document 1 includes a semiconductor light source, a projection lens, and a cylindrical lens holder. In the conventional vehicular lamp of Patent Document 1, a projection lens having an outer diameter substantially equal to the inner diameter of the lens holder is accommodated in a cylindrical lens holder, and then the projection lens is screwed into the lens holder with a screw. It is fixed. In this structure, the inner diameter of the lens holder and the outer diameter of the projection lens are formed to be substantially equal, so that the assembling workability is poor.

  Thus, for example, a vehicular lamp 50 as shown in FIGS. 7 to 10 has been proposed. As shown in FIG. 8, the vehicular lamp 50 includes a semiconductor light source 61 and a lens that emits light from the semiconductor light source 61 from the light incident surface 53 a, exits from the light exit surface 53 b, and is irradiated as a light distribution pattern. A lens 52 having a portion 56 and a bezel member 55 having a rectangular lens arrangement opening 54 corresponding to the light emitting surface 53b of the lens portion 56 are provided. The bezel member 55 accommodates and arranges a part of the lens portion 56 on the light emission surface 53 b side in the lens arrangement opening 54, and the inner surface of the lens arrangement opening 54 has a portion on the light emission surface 53 b side of the lens portion 56. The direct light leaking from the outer periphery of the lens unit 56 is shielded around the outer periphery.

  Further, as shown in FIG. 10, the lens 52 is extended outward from the lens portion 56 having a rectangular shape in front view substantially equal to the rectangular shape of the lens arrangement opening 54, and both sides of the lens portion 56. A pair of lens mounting pieces 57 and 57 are integrally provided. Then, from the back surface of the bezel member 55 (the inside of the lamp), a part of the light emitting surface 53b side of the lens portion 56 is accommodated in the lens arrangement opening 54, and the lens mounting piece 57, An attachment pin 59 provided corresponding to the attachment holes 58 and 58 of 57 is inserted into the attachment holes 58 and 58. Thereafter, the lens 52 is fixedly attached to the bezel member 55 by caulking a part of the attachment pin 59 protruding from the attachment holes 58, 58 to the back side of the attachment pieces 57, 57.

  Further, the lens 52 and the bezel member 55 integrated in this way are, as shown in FIG. 8, a semiconductor-type light source 61 having a light emitting chip 60 attached to a base member (not shown) of the vehicular lamp 50. , The reference optical axis Z of the lens 52 is aligned with the center O of the light emitting chip 60, and is attached to a lamp housing (not shown) via a base member, and is arranged as a lamp unit together with the semiconductor light source 61. .

  The conventional vehicular lamp 50 is configured as described above, and the operation thereof will be described below.

When the light emitting chip 60 of the semiconductor-type light source 61 is turned on, as shown in FIG. 8, the direct light La emitted from the light emitting surface of the light emitting chip 60 enters the lens portion 56 of the lens 52 from the light incident surface 53a and the light. Light distribution is controlled on the incident surface 53a. The incident light that has entered the lens unit 56 is emitted from the light exit surface 53 b of the lens unit 56. At this time, the emitted light is subjected to light distribution control on the light emitting surface 53b, and the emitted light L1 from the lens portion 56 is emitted.
In this way, the emitted light forms an isoluminous curve represented by a light distribution pattern MP as shown in FIG. 11, for example.

  By the way, in the vehicular lamp 50 having this structure, in order to easily store and arrange the lens portion 56 in the lens arrangement opening 54, as shown in FIG. 8, the lens arrangement opening 54 and the lens portion 56 of the bezel member 55 are arranged. A gap 62 is provided at the boundary. For this reason, a part Lb of the direct light La from the semiconductor-type light source 61 toward the lens unit 56 is emitted to the outside through the gap 62 as the light L2. Then, as shown in FIG. 11, a second light distribution pattern SP that is elongated along the light distribution pattern MP is formed above the light distribution pattern MP that is a normal first light distribution pattern. This light distribution pattern SP becomes glare light. FIG. 11 is a diagram of an isoluminous curve showing a simplified light distribution pattern on a screen drawn by computer simulation. In this isoluminal curve diagram, the central isoluminous curve indicates the high luminous intensity zone (HZ), and the outer isoluminous intensity curve indicates the low luminous intensity zone (LZ). Furthermore, the symbol “VU-VD” indicates vertical lines on the top and bottom of the screen. Reference sign “HL-HR” indicates horizontal lines on the left and right of the screen.

JP2013-73811A.

  As described above, in the conventional vehicular lamp, in order to make it easier to store and arrange the lens portion in the lens arrangement opening of the bezel member, the lens arrangement opening of the bezel member has a margin larger than the outer diameter of the lens portion. If it is formed with a gap, a gap is formed at the boundary with the lens portion. Therefore, a part of the direct light from the semiconductor-type light source toward the lens part leaks to the outside through the gap between the boundaries, and generates glare light different from the normal light distribution pattern. This glare light has the problem of giving glare to those who see the vehicular lamp.

  Accordingly, the problem to be solved by the present invention is to provide a vehicular lamp that eliminates glare produced by leakage of part of the light from the gap between the lens arrangement opening of the bezel member and the lens portion. That is.

The present invention has been proposed to achieve the above object, and is grasped by the following configuration.
(1) A vehicular lamp according to the present invention includes a semiconductor-type light source, and a lens having a lens unit that emits light from the semiconductor-type light source from a first light incident surface and irradiates the light output surface as a light distribution pattern; A lens arrangement opening corresponding to the light exit surface, and a bezel member disposed around the outer periphery of the light exit surface by the lens placement opening, wherein the lens portion includes the first light entrance surface. And a light control unit having a second surface interposed in the light from the semiconductor-type light source toward the gap between the lens arrangement opening and the lens unit.

(2) In the configuration of (1), the second surface causes the light incident on the second surface to be emitted downwardly by the second surface and the light emitting surface.

(3) In the configuration of the above (1) or (2), the light control unit is provided on an upper side of the lens unit, and the second light is incident on the second surface as the first light. It has a surface shape that guides it in a direction that intersects with the light incident on the upper end of the incident surface and traveling toward the upper end of the light exit surface.

(4) In the configurations of (1) to (3), the light exit surface is formed with a secondary curved surface, and the first light incident surface is formed with a free curved surface.

(5) In the configurations of (1) to (4), the second surface is formed such that the width in the vertical direction decreases from the lens center side toward both end sides.

  ADVANTAGE OF THE INVENTION According to this invention, the vehicular lamp which eliminated the glare light which a part of light leaks from the clearance gap between the lens arrangement | positioning opening of a bezel member and a lens part can be provided.

It is a front view of the main components of the lamp unit which shows the embodiment of the vehicular lamp concerning this invention. It is explanatory drawing (description corresponding to the sectional view on the AA line in FIG. 1) which shows the function of the light control part in a lens. It is a side view which shows attachment of a bezel member and a lens. It is a rear view which shows attachment of a bezel member and a lens. It is explanatory drawing of the luminous intensity curve of a screen which shows the light distribution pattern of a lamp unit same as the above. It is a perspective view of a lens same as the above. It is a front view of the main components of the lamp unit which shows an example of the conventional vehicle lamp. It is explanatory drawing (description figure corresponding to the BB sectional drawing in FIG. 7) which shows the problem in the conventional lamp unit same as the above. It is a side view which shows the attachment of the conventional bezel member and a lens. It is a rear view which shows the attachment of the conventional bezel member and a lens. It is explanatory drawing of the luminous intensity curve of a screen which shows the light distribution pattern of the conventional lamp unit same as the above.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as “embodiments”) will be described with reference to the accompanying drawings. In the description of the embodiment, the same numbers are assigned to the same elements throughout. In addition, this invention is not limited by this embodiment.

  1 to 6 show an embodiment of a vehicular lamp according to the present invention. As shown in FIG. 2, the vehicular lamp 11 is disposed in a lamp chamber formed by a lamp housing (not shown) and a lamp lens (not shown), and includes a semiconductor-type light source 12, a lens 13, and a bezel. The member 14 is provided.

  The semiconductor-type light source 12 is, for example, a self-luminous semiconductor-type light source such as an LED, an OEL, or an OLED (organic EL). As shown in FIG. 2, the semiconductor light source 12 includes a light emitting chip (LED chip) 15, a substrate 17 on which the light emitting chip (LED chip) 15 is mounted, and the like, and includes a cooling member 18 and a base member (not shown). And is attached to the lamp housing. Further, the center O of the light emitting surface of the light emitting chip 15 is located at or near the reference focal point F of the lens 13 and on or near the reference optical axis Z of the lens 3.

  The lens 13 is composed of a light transmissive member. The light transmissive member is made of a resin member such as acrylic or polycarbonate. As shown in FIG. 4, the lens 13 includes a lens portion 19 and an attachment portion 20.

  The attachment portion 20 is integrally provided at both left and right end portions of the lens portion 19. The attachment portion 20 is provided with a plurality of attachment holes 21 for attachment to the bezel member 14.

  In this example, the lens unit 19 has a rectangular shape in front view (see FIG. 1). As shown in FIG. 2, the direct light La from the semiconductor light source 12 (light emitting chip 15) enters the lens unit 19. It has a first light incident surface 19a and a light emitting surface 19b from which light incident from the first light incident surface 19a into the lens unit 19 is emitted. In addition, the first light incident surface 19a of the lens unit 19 is formed as a free-form surface. The light exit surface 19b of the lens portion 19 has a convex shape protruding to the opposite side of the semiconductor-type light source 12, and is formed by a quadric surface.

  When the direct light La emitted from the semiconductor-type light source 12 is incident on the first light incident surface 19a, the lens unit 19 emits the light from the light emitting surface 19b as light L1, and as shown in FIG. A normal first light distribution pattern MP is formed. FIG. 5 is a diagram of an isoluminous curve showing a simplified light distribution pattern MP on the screen drawn by computer simulation. In this isoluminal curve diagram, the central isoluminous curve indicates the high luminous intensity zone (HZ), and the outer isoluminous intensity curve indicates the low luminous intensity zone (LZ). Furthermore, the symbol “VU-VD” indicates vertical lines on the top and bottom of the screen. Reference sign “HL-HR” indicates horizontal lines on the left and right of the screen.

  As shown in FIGS. 2 and 4, the lens portion 19 has an opening 25 for lens arrangement of the lens portion 19 and the bezel member 14 on the extension of the first light incident surface 19 a on the first light incident surface 19 a side. The light control unit 23 including the second surface 23a interposed in the light Lb toward the gap 26 is integrally provided. The light control unit 23 has a vertical width S (see FIGS. 2 and 4) on the upper side of the lens unit 19 along the first light incident surface 19a and on the extension of the first light incident surface 19a. A second surface 23a formed continuously in a band shape is provided. In addition, the vertical width S of the second surface 23a of the light control unit 23 having the substantially band shape is large at the center side of the lens unit 19 and decreases toward both ends as shown in FIGS. Is formed.

  As shown in FIG. 2, the light Lb traveling from the semiconductor light source 12 toward the gap 26 between the lens unit 19 and the lens arrangement opening 25 of the bezel member 14 is formed on the second surface 23 a of the light control unit 23. When the light is incident, the light distribution is controlled so that the incident light is emitted from the light emitting surface 19b, and the light L2 traveling into the above-described light distribution pattern MP by the second surface 23a and the light emitting surface 19b. The light distribution is controlled so as to be emitted. Accordingly, the outgoing light L2 of the light Lb incident on the second surface 23a is synthesized in the light distribution pattern MP described above as a portion represented by LC in FIG.

  As shown in FIGS. 1 and 4, the bezel member 14 has a lens arrangement opening 25 having a rectangular shape corresponding to the light emitting surface 19 b of the lens portion 19 of the lens 13. Further, as shown in FIG. 1, the surface 14b of the bezel member 14 opposite to the semiconductor-type light source 12, that is, the surface 14b when viewed from the front when viewing the light emitting surface 19b of the lens portion 19, is horizontal. It is formed as a laterally long curved member having an oblong shape elongated in the direction (lateral direction).

Also, as shown in FIG. 4, the surface 14a of the bezel member 14 on the semiconductor-type light source 12 side is attached in correspondence with the attachment holes 21 provided in both attachment portions 20 and 20 of the lens 13, respectively. A pin 27 is attached. The lens 13 is assembled to the bezel member 14 from the surface 14 a side of the bezel member 14. In this assembly, when the attachment pin 27 on the bezel member 14 side is engaged with the attachment hole 21 of the lens 13 and attached, a part or all of the lens portion 19 on the light emitting surface 19b side is part of the lens arrangement opening 25. As shown in FIGS. 1 to 4, the outer peripheral side surface of the lens portion 19 is arranged in a state surrounded by the inner peripheral edge of the lens arrangement opening 25.
Here, as shown in FIG. 3 which is a side view of the cross section taken along the line AA of FIG. 1, the surface 14b of the bezel member 14 opposite to the semiconductor-type light source 12 is It has a convex curved surface shape in the direction (direction in which light is emitted), and has a lens arrangement opening 25 in the center.
As described above, when the light exit surface 19b of the lens portion 19 is disposed in the lens placement opening 25, the convex curved surface shape of the light exit surface 19b of the lens portion 19 is positioned in the lens placement opening 25. When viewed from the side, the light emitting surface 19b of the lens member 19 and the surface 14b of the bezel member 14 have a surface in the outer direction (the direction in which light is emitted) as a convex curved surface as a whole. Become.

  Then, the bezel member 14 and the lens 13 are integrated by crimping a part of the mounting pin 27 protruding to the back surface side through the mounting holes 21 of the both mounting portions 20 and 20 of the lens 13.

  Further, the lens 13 and the bezel member 14 integrated in this way are, as shown in FIG. 2, a semiconductor-type light source 12 having a light emitting chip 15 attached to a base member (not shown) of the vehicular lamp 11. The reference optical axis Z of the lens 13 is aligned with the center O of the light emitting chip 15 and is attached to a lamp housing (not shown) via a base member, and is arranged as a lamp unit together with the semiconductor light source 12. . When the lens 13 together with the bezel member 14 is disposed in front of the semiconductor light source 12 in this way, the light control unit 23 of the lens unit 19 in this example, as shown in FIG. A second surface 23 a is formed at a position interposed in the light Lb emitted from the light emitting chip 15 and directed toward the gap 26 in the boundary between the upper side of the lens portion 19 and the lens arrangement opening 25.

  The vehicular lamp 11 according to this embodiment is configured as described above, and the operation thereof will be described below.

  When the light emitting chip 15 of the semiconductor light source 12 is turned on, direct light La emitted from the light emitting surface of the light emitting chip 15 enters the lens portion 19 of the lens 13 from the first light incident surface 19a, and the first light incident surface 19a. The light distribution is controlled. Further, the incident light L1 that has entered the lens unit 19 exits from the light exit surface 19 b of the lens unit 19. At this time, the emitted light is subjected to light distribution control on the light emitting surface 19b, and forms, for example, an isoluminous curve represented by a light distribution pattern MP as shown in FIG.

  On the other hand, the light Lb radiated from the light emitting surface of the light emitting chip 15, that is, the light Lb from the semiconductor-type light source 12 toward the gap 26 between the lens placement opening 25 of the bezel member 14 and the lens portion 19 is controlled by light. The light enters the light control unit 23 from the second surface 23 a of the unit 23. The incident light Lb is light-distributed and controlled by the second surface 23a so as to go to the light-emitting surface 19b, is also subjected to light-distribution control by the light-emitting surface 19b, and goes to the light distribution pattern MP described above. It is emitted as L2. That is, the second surface 23a causes the light Lb incident on the second surface 23a to be emitted from the light emitting surface 19b, and is directed downward from the horizontal line by the second surface 23a and the light emitting surface 19b. It has a surface shape that is emitted as light L2 that travels into the light pattern MP. As a result, in the light distribution pattern MP formed by the light of L1, the light of L2 is further combined with the portion represented as LC in FIG.

  By the way, the emitted light L3 indicated by a dotted line in FIG. 2 indicates light that is incident on the upper end of the first light incident surface 19a from the light emitting chip 15 of the semiconductor light source 12 and is emitted from the upper end of the light emitting surface 19b. is there. That is, the emitted light L3 hits the light emitted through the upper end of the lens unit 56 shown in FIG. 8, and the portion above the dotted line of the emitted light L3 of the lens unit 19 shown in FIG. This is a newly provided part.

In other words, the light incident on the upper end of the light incident surface 53a of the conventional lens unit 56 does not have light traveling from the upper side to the lower side through the trajectory indicated as L3 in FIG. In the part 56, the light emitted from the upper end of the light emitting surface 53b does not intersect with other light.
Note that the conventional lens unit 56 shown in FIG. 8 has a problem that light such as the emitted light L3 tends to become glare light because it is directed directly to the outside from the light source.

On the other hand, in the lens unit 19 of the present embodiment, the light that is originally the glare light existing further above the lens unit is intended to be effectively utilized by interposing it in the light distribution pattern via the light control unit 23.
For this reason, the surface shape is such that the light incident from the second surface 23a is guided in a direction that intersects the light traveling from the upper end of the light incident surface 19a of the lens unit 19 toward the upper end of the light emitting surface 19b. Two surfaces 23a are formed.

  In this way, the light incident on the second surface 23a of the light control unit 23 travels below a horizontal line that intersects the light traveling from the upper end of the first incident surface 19a of the lens unit 19 toward the upper end of the light exit surface 19b. As a result of the light, conventionally, the light that becomes the glare light shown as SP in FIG. 11 is synthesized in the light distribution pattern as shown by LC in FIG.

  Further, as described above, the light L3 shown in FIG. 2 is light passing through the upper end of the conventional lens unit 56 (see FIG. 8). In the lens unit 19, the portion below the line of the light L3 is This is the same as the conventional lens portion 56 shown in FIG. 8 (hereinafter, this portion is referred to as “conventional lens portion”). Therefore, the light emitting surface 19b has substantially the same shape as the conventional light emitting surface 56b, and therefore the state of the gap 26 between the light emitting surface 19b and the bezel member 14 is the same as the conventional gap. ing. For this reason, the workability when placing the lens portion 19 in the lens placement opening 25 is not bad as in the prior art. In addition, since the light control unit 23 is made of the same material as the conventional lens unit, there is no visual boundary between the light control unit 23 and the conventional lens unit. When the gap 26 is viewed from the outside, the light control unit 23 on the back side of the gap 26 cannot directly see the semiconductor light source 12 from the outside, so that the appearance when the back is viewed from the gap is improved. The semiconductor light source 12 can also be prevented from being viewed directly.

In this embodiment, as shown in FIG. 6, the second surface 23a of the light control unit 23 has a substantially planar shape curved in the direction of the light emitting surface 19b along the first light incident surface 19a. However, it is not limited to this.
The second surface 23a controls the light distribution so that the light incident on the second surface 23a is directed to the light emitting surface 19b shared with the first light incident surface 19a, and also emits light from the second surface 23a. The surface shape may be any surface shape that can form the light LC positioned in the light distribution pattern as shown in FIG.

Further, in this embodiment, the second surface 23a is linearly extended upward from the upper end portion of the first light incident surface 19a as shown in FIG. It is not limited to the extended surface. The second surface 23a extended as a gentle curved surface from the upper end of the first light incident surface 19a may be used so that the light LC positioned in the light distribution pattern as shown in FIG. 5 can be formed.
(Description of the effect of the embodiment)
The vehicular lamp 11 according to this embodiment is configured and operated as described above, and the effects thereof will be described below.

  In the vehicular lamp 11 according to this embodiment, the light Lb from the light emitting chip 15 of the semiconductor light source 12 toward the gap 26 between the bezel member 14 and the lens arrangement opening 25 is transmitted from the lens portion 19 of the lens 13. It is blocked by the light control unit 23 and does not leak outside through the gap 26 at the boundary. For this reason, it can suppress that the glare light different from normal light distribution generate | occur | produces. Thereby, it is possible to improve safety without dazzling the person who has seen the vehicle lamp 11.

  Further, in the vehicular lamp 11 according to this embodiment, the second surface 23a of the light control unit 23 is directed to the light emitting surface 19b sharing the light incident on the second surface 23a with the first light incident surface 19a. And the second surface 23a is the second surface 23a and the light emitting surface 19b, and the light LC positioned in the light distribution pattern as shown in FIG. 5 is formed. The surface shape can be made. As a result, the light control unit 23 is interposed in the light Lb from the light emitting chip 15 of the semiconductor-type light source 12 toward the gap 26 between the lens placement opening 25 of the bezel member 14 and the lens unit 19, and the light Control is performed so that Lb is emitted as light L2 that goes into the light distribution pattern MP of the lens unit 19 and is combined into the light distribution pattern MP. Accordingly, not only the glare light leaking from the gap 26 can be eliminated, but the light that has not been utilized in the light distribution pattern is synthesized in the light distribution pattern. Can be used effectively to improve the luminous flux of the entire light distribution pattern.

  Further, in the vehicular lamp 11 according to this embodiment, the light emitting surface 19b of the lens portion 19 has substantially the same shape as the conventional one. Accordingly, the gap 26 between the light emitting surface 19b and the bezel member 14 is substantially the same as that of the prior art. Therefore, the assembling workability when the lens portion 19 is arranged in the lens arrangement opening 25 of the bezel member 14 is not deteriorated.

  Further, in the vehicle lamp 11 according to this embodiment, the first light incident surface 19a of the lens portion 19 of the lens 13 is formed with a free curved surface, and the light emitting surface 19b is formed with a secondary curved surface. Thereby, as shown in FIG. 5, the light distribution pattern which has the isoluminous curve of a high luminous intensity zone (HZ) and the isoluminous intensity curve of a low luminous intensity zone (LZ) can be formed easily.

  Furthermore, the vehicular lamp 11 according to this embodiment is formed such that the vertical width S of the second surface 23a of the light control unit 23 is large at the center side of the lens 13 and decreases toward both ends. Yes. That is, the direct light Lb directed from the light emitting chip 15 of the semiconductor-type light source 12 toward the gap 26 is stronger toward the center of the lens unit 19 and decreases toward both ends, so that the lens unit 19 is blocked on the entire upper side on average. It can be synthesized in the light distribution pattern.

  In this embodiment, the structure in which the light control unit 23 is provided only on the upper portion of the lens portion 19a is disclosed. However, the light control portion 23 may be provided on the lower portion (lower side) of the lens portion 19a in addition to the upper portion of the lens portion 19a. Good.

DESCRIPTION OF SYMBOLS 11 Vehicle lamp 12 Semiconductor type light source 13 Lens 14 Bezel member 14a Semiconductor type light source side surface 14b Side surface opposite to semiconductor type light source side 15 Light emitting chip (LED chip)
DESCRIPTION OF SYMBOLS 17 Board | substrate 18 Cooling member 19 Lens part 19a 1st light-incidence surface 19b Light output surface 20 Mounting part 21 Mounting hole 23 Light control part 23a 2nd surface 25 Lens arrangement opening 26 Gap 27 Mounting pin Z Optical axis O Center F Focus MP light distribution pattern (first light distribution pattern)
HZ High light intensity zone LZ Low light intensity zone LC Synthesis zone SP Second light distribution pattern La Normal light Lb Light toward gap direction L1, L2 Emission light S Vertical width of light control unit

Claims (3)

A semiconductor light source;
A lens having a lens unit that irradiates light from the semiconductor-type light source from the first light incident surface and irradiates the light exit surface as a light distribution pattern;
A lens arrangement for opening corresponding to the light emitting surface, and a bezel member disposed to surround the light emitting surface peripheral by the lens disposition opening,
Said lens unit, a light control unit provided on the upper side of the lens portion, wherein the first upper portion of the light incident surface is extended upwardly, the said lens disposition opening from the semiconductor-type light source lens with a second surface interposed light directed into the gap boundary between the parts has the light control unit,
The second surface has a surface shape that guides the light incident on the second surface in a direction that intersects with the light that is incident on the upper end of the first light incident surface and travels toward the upper end of the light emitting surface. And
The vehicle in which the second surface irradiates light incident on the second surface as outgoing light directed downward from the light emitting surface from which light incident from the first light incident surface is emitted. Lamps. 2. The vehicular lamp according to claim 1, wherein the light exit surface is formed with a quadratic curved surface, and the first light incident surface is formed with a free curved surface. It said second surface, toward the lens center side at both ends, a vehicle lamp according to claim 1 or claim 2, characterized in that the width of the vertical direction is formed to be smaller.