JP6238668B2 - Vehicle lighting - Google Patents

Description

  The present invention relates to a vehicular lamp such as a fog lamp.

  For example, a vehicular lamp such as a fog lamp disposed on the left and right of the front portion of the vehicle has at least a light source and light emitted from the light source in the front of the vehicle defined by a housing and an outer lens that covers the opening. It is configured to accommodate a reflector that reflects to the back. In such a vehicular lamp, the outer lens has its periphery fixed to the periphery of the opening of the housing by the structure shown in FIG.

  That is, FIG. 7 is a partial cross-sectional view showing a fixing portion of an outer lens to a housing in a conventional vehicle lamp. As shown in FIG. 7, the outer lens 103 side (upper part of FIG. A lens mounting groove 102a that opens toward the outer lens 103 is formed in the vicinity of the outer peripheral edge of the outer lens 103 so that the lens mounting leg 103a toward the housing 102 (downward in FIG. 7) is substantially perpendicular to the lens surface of the outer lens 103. It is installed.

  Thus, in order to fix the outer lens 103 to the housing 102, an adhesive 109 such as hot melt that is in a molten state by heating is injected into the lens mounting groove 102a of the housing 102, and then the lens mounting leg 103a of the outer lens 103 is attached. It is inserted into the lens mounting groove 102a of the housing 102. In this state, the adhesive 109 is cooled and solidified, so that the vicinity of the outer peripheral edge of the outer lens 103 is fixed to the peripheral edge of the opening of the housing 102.

  However, in the conventional vehicular lamp in which the outer lens 103 is fixed to the housing 102 by the above-described fixing structure, the distal end portion of the transparent lens mounting leg 103a integrally protruding from the outer lens 103 is the adhesive 109, the housing 102, or the like. Therefore, when the vehicle lamp is viewed from the front, the lens mounting leg 103a portion of the outer lens 103 looks dark like a black edge, and there is a problem that the overall aesthetics are impaired.

  Therefore, Patent Document 1 proposes a vehicular lamp shown in FIG.

  That is, FIG. 8 is a plan cross-sectional view of the main part of the vehicle lamp proposed in Patent Document 1. In the illustrated vehicle lamp 201, a lens mounting leg 203a is provided at the outermost peripheral position of the outer lens 203. A light guide portion 203b that curves toward the inside of the outer lens 103 is provided in an appropriate range from the lens surface of the mounting leg 203a to the housing 202, and the inside of the front end of the light guide portion 203b on the housing 202 side. In the portion, a daylighting unit 203c for introducing light into the light guide unit 203b is provided. The housing 202 is provided with a reflecting surface 202b that reflects light from the light source 205 and external light and directs it toward the daylighting portion 203c of the lens mounting leg 203a.

  According to such a vehicular lamp 201, the reflected light obtained by reflecting the light from the light source 205 and the external light on the reflecting surface 202b of the housing 202 is introduced into the lens mounting leg 203a from the lighting unit 203c, and this light is guided to the light guide unit. Since 203b is guided and emitted from the lens surface of the outer lens 203 to the outside, a dark portion does not occur on the lens surface of the outer lens 203, and the appearance of the entire vehicular lamp 201 is not impaired.

JP 11-260108 A

  However, in the vehicle lamp 201 shown in FIG. 8 proposed in Patent Document 1, since the reflected light from the housing 202 is used, it is necessary to form the reflecting surface 202b on the housing 202, and the shape of the housing 202 is complicated. There is a problem of becoming. The lens mounting leg 203a of the outer lens 203 has a daylighting portion 203c for taking in the reflected light reflected by the reflecting surface 202b of the housing 202, and a light guiding portion 203b for guiding the light taken in from the daylighting portion 203c. Therefore, there is a problem that the shape of the lens mounting leg 203a is complicated.

  Furthermore, in the vehicular lamp 201 proposed in Patent Document 1, when the light source 205 is a light bulb, light is emitted from the light bulb in all directions, so the intensity of light emitted from the light source 205 in the lateral direction is strong. Therefore, when the light source 205 is an LED (light emitting diode) that emits light with high directivity, the intensity of the light in the lateral direction is weak, so that the lens mounting leg 203a is lit. There is a problem that cannot be expected. There is an example in which another light source is used in order to increase the intensity of light in the lateral direction, but there is a problem in that an increase in cost cannot be avoided if another light source is used.

  The present invention has been made in view of the above problems, and even if the light source is an LED, the object of the present invention is to enhance the aesthetics by shining the lens mounting leg portion of the outer lens with a simple configuration. The object is to provide a vehicular lamp.

In order to achieve the above object, according to the first aspect of the present invention, a lens mounting leg projecting from the outer peripheral edge of the outer lens is inserted into a lens mounting groove formed at the peripheral edge of the opening of the housing and bonded by an adhesive. In the vehicular lamp configured to attach the outer lens to the housing, and to house at least an LED and a reflector that reflects light emitted from the LED in a lamp chamber defined by the housing and the outer lens.
The outer peripheral edge portion of the outer lens extends to the outside in the radial direction from the reflector, and the surface of the extended portion has a convex curved surface, and the convex curved surface shape is reflected from the reflector after being emitted from the LED. A shape in which light is totally reflected by the convex curved surface and incident on the lens mounting leg ,
The lens mounting leg outer side surface and the outer peripheral edge of the lens mounting leg on the back surface of the extending portion are subjected to a texture process .

  The invention according to claim 2 is the invention according to claim 1, wherein the angle α formed by the tangent line and the left and right straight lines at the point where the reflected light of the convex curved surface of the outer lens is totally reflected is set to 25 ° or less, The angle β between the normal line at the point where the reflected light of the convex curved surface is totally reflected and the reflected light is set to 40 ° or more.

The invention according to claim 3 is the invention according to claim 1 or 2, wherein the lens mounting groove opens toward the front of the vehicle.
The lens mounting leg is formed in a rib shape protruding toward the rear of the vehicle .

According to the present invention, since so as to incident on the lens mounting legs of said outer lens reflected light reflected by the reflector and emitted from the LED is totally reflected by the outer lens surface (lens surface), lens attachment legs by reflected light Even if the light source is an LED, it is possible to prevent the occurrence of the problem that when the vehicular lamp is viewed from the front, the lens mounting leg portion of the outer lens looks dark like a black edge and the overall beauty is impaired. Since the lens mounting leg outer side surface and the lens mounting leg outer peripheral edge on the back surface of the outer lens extending portion are subjected to graining, the light emitted from them is diffused and uniformed, so that the aesthetics of the vehicular lamp can be improved. Increased further.

Further , the surface of the extending portion extending radially outward from the reflector of the outer lens is a convex curved surface, and the shape of the convex curved surface is set to a predetermined condition (specifically, the reflected light on the surface of the convex curved surface is totally reflected. The angle α between the tangent line at the point where the light is reflected and the left and right straight lines is 25 ° or less, and the angle β between the normal line and the reflected light at the point where the reflected light of the convex curved surface is totally reflected is set to 40 ° or more). It is only necessary to satisfy this requirement, and it is not necessary to apply special processing with a large shape change to the housing or the outer lens, so that the above effect can be obtained with a simple configuration.

1 is a front view of a vehicular lamp according to the present invention. It is the sectional view on the AA line of FIG. It is the BB sectional view taken on the line of FIG. FIG. 4 is an enlarged detail view of a C part in FIG. 3. It is a perspective view which shows the state which removed the outer lens of the vehicle lamp which concerns on this invention. It is a perspective view which shows the state which removed the outer lens and extension of the vehicle lamp which concerns on this invention. It is a fragmentary sectional view which shows the fixation part to the housing of the outer lens in the conventional vehicle lamp. It is a plane sectional view of a vehicular lamp main part proposed in patent documents 1.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  1 is a front view of a vehicular lamp according to the present invention, FIG. 2 is a sectional view taken along line AA in FIG. 1, FIG. 3 is a sectional view taken along line BB in FIG. 5 is a perspective view showing a state in which the outer lens of the vehicular lamp according to the present invention is removed. FIG. 6 is a perspective view showing a state in which the outer lens and the extension of the vehicular lamp are removed.

  A vehicular lamp 1 according to the present embodiment is a fog lamp disposed on the left and right of a front portion of a vehicle, and is defined by an outer lens 3 that covers a housing 2 and its front opening as shown in FIGS. A plurality of (six in the illustrated example) LEDs 5 which are light sources arranged in the horizontal direction (left and right direction in FIG. 3), and a flat substrate 6 on which these LEDs 5 are mounted. A reflector 7 that reflects the light emitted from each LED 5 toward the front of the vehicle (left side in FIG. 2) and an extension 8 that covers the periphery of the reflector 7 are accommodated.

  The housing 2 is integrally formed in a box shape with an opaque resin, and the circular ring-shaped opening periphery has a front of the vehicle between the outer periphery of the extension 8 as shown in detail in FIG. A lens mounting groove 2a that opens toward the end is formed over the entire circumference.

  The outer lens 3 is integrally formed in a circular arc curved shape using a transparent resin such as polycarbonate, and a rib-shaped lens mounting leg 3a protruding toward the rear of the vehicle is integrally formed on the outer periphery of the outer lens 3 over the entire circumference. Has been. In order to fix the outer lens 3 to the housing 2, an adhesive such as hot melt that is melted by heating in the lens mounting groove 2 a formed between the periphery of the opening of the housing 2 and the outer periphery of the extension 8. After injecting 9, the lens mounting leg 3 a of the outer lens 3 is inserted into the lens mounting groove 2 a of the housing 2. In this state, the adhesive 9 is cooled and solidified, so that the vicinity of the outer peripheral edge of the outer lens 3 is fixed to the peripheral edge of the opening of the housing 2, and the outer lens 3 and the housing 2 are hermetically sealed. A light chamber 4 is defined.

  The substrate 6 on which the plurality of LEDs 5 are mounted is attached to the lower surface of the substrate holder 10 fixed to the upper portion of the housing 2, and the reflector 7 is disposed below the substrate 6. Here, the reflector 7 is integrally formed in a rectangular box shape that opens forward and upward by an opaque resin, and the main reflection portion 7b surrounded by the left and right side walls 7a is an elliptical curved surface that rises obliquely upward toward the rear. It is configured as. The inner surface of the reflector 7 constitutes a reflecting surface, and the reflecting surface is subjected to treatment such as aluminum vapor deposition for increasing the reflectance.

  The extension 8 is integrally formed of an opaque resin, and is disposed on the inner side of the outer lens 3 in the lamp chamber 4 along the inner surface of the outer lens 3. An opening 8a is formed in the lower half of the extension 8 to allow reflected light reflected by the reflector 7 and traveling toward the front of the vehicle. An upper portion 8b of the opening 8a is A louver-shaped shielding portion that covers the substrate holder 10, the LED 5, the substrate 6, and the like from the front is configured.

  In the vehicular lamp 1 configured as described above, when current is supplied to each LED 5 from a power source (not shown) such as a battery, each LED 5 emits light, and the light is reflected by the reflector 7 toward the front of the vehicle. Then, the light passes through the outer lens 3 and is emitted forward of the vehicle.

  By the way, in the vehicular lamp 1 according to the present embodiment, as shown in FIG. 3, the outer peripheral edge portion (Z region in the drawing) of the outer lens 3 extends to the radially outer side from the reflector 7 and extends. 3A is formed, and the surface (lens surface) of the extending portion 3A is a convex curved surface as shown in detail in FIG. The convex curved surface shape of the surface (lens surface) of the extending portion 3A is shown in FIG. 4 in detail as the light emitted from the LED 5 and reflected by the inner surface (reflection surface) of the side wall 7a of the reflector 7 is shown in FIG. As shown in FIG. 2, the shape is such that the light is totally reflected by the convex curved surface and directed toward the lens mounting leg 3a of the outer lens 3. Specifically, as shown in FIG. 4, the angle α formed by the tangent line T and the left and right straight lines D at the point p where the reflected light L of the convex curved surface of the extending portion 3A of the outer lens 3 is totally reflected is 25 ° or less ( In the present embodiment, the angle β is set to 22 °), and the angle β formed by the normal N and the reflected light L at the point p of the convex curved surface is set to 40 ° or more (56 ° in the present embodiment). Has been. Further, in the present embodiment, the lens mounting leg 3a of the outer lens 3 and the peripheral surface (the E surface in FIG. 4) are subjected to graining.

  Thus, according to the vehicular lamp 1 according to the present embodiment, as shown in FIG. 3, the reflected light L emitted from the LED 5 and reflected by the inner surface (reflection surface) of the side wall 7a of the reflector 7 is shown in FIG. As shown in detail in FIG. 2, since the light is totally reflected by the surface (lens surface) of the extending portion 3A of the outer lens 3 and is directed toward the lens mounting leg 3a of the outer lens 3, the lens mounting leg 3a and the periphery thereof are reflected light. Even if the light source is LED5 even when the light source is LED5, when the vehicular lamp 1 is viewed from the front, the lens mounting leg 3a portion of the outer lens 3 looks dark like a black edge and the overall aesthetics are impaired. It is prevented.

  Then, the surface of the extending portion 3A extending radially outward from the reflector 7 of the outer lens 3 is a convex curved surface, and the shape of the convex curved surface is set to a predetermined condition (specifically, the reflection of the surface of the convex curved surface). The angle α formed between the tangent line T at the point p where the light L is totally reflected and the left and right straight lines D is 25 ° or less, and the angle β formed between the normal line N and the reflected light L at the point p on the convex curved surface is set to 40 ° or more. It is only necessary to satisfy the setting), and the housing 2 and the outer lens 3 do not need to be specially processed with a large shape change, and thus the above-described effect can be obtained with a simple configuration.

  Further, in the present embodiment, since the lens mounting leg 3a of the outer lens 3 and the peripheral surface (E surface shown in FIG. 4) are subjected to graining, the light emitted from those surfaces is diffused and uniformed, As a result, the effect of further enhancing the beauty of the vehicular lamp 1 can be obtained.

DESCRIPTION OF SYMBOLS 1 Vehicle lamp 2 Housing 2a Lens mounting groove of housing 3 Outer lens 3A Outer lens extension part 3a Lens mounting leg of outer lens 4 Lamp chamber 5 LED
6 Substrate 7 Reflector 7a Reflector Side Wall 7b Reflector Main Reflector 8 Extension 8a Extension Opening 8b Extension Shield 9 Adhesive 10 Substrate Holder L Reflected Light

Claims (3)

A lens mounting leg formed on the outer peripheral edge of the outer lens is inserted into a lens mounting groove formed on the peripheral edge of the opening of the housing and bonded with an adhesive to attach the outer lens to the housing, and the housing and the outer lens In a vehicle lamp configured to accommodate at least an LED and a reflector that reflects light emitted from the LED in a lamp chamber defined by
The outer peripheral edge portion of the outer lens extends to the outside in the radial direction from the reflector, and the surface of the extended portion has a convex curved surface, and the convex curved surface shape is reflected from the reflector after being emitted from the LED. A shape in which light is totally reflected by the convex curved surface and incident on the lens mounting leg ,
A vehicular lamp, wherein the lens mounting leg outer side surface and the outer peripheral edge of the lens mounting leg on the back surface of the extending portion are subjected to a graining process .   The angle α formed between the tangent line at the point where the reflected light of the convex curved surface of the outer lens is totally reflected and the left and right straight lines is set to 25 ° or less, and the normal line at the point where the reflected light of the convex curved surface is totally reflected 2. The vehicular lamp according to claim 1, wherein an angle [beta] formed with the reflected light is set to 40 [deg.] Or more. The lens mounting groove opens toward the front of the vehicle,
The vehicular lamp according to claim 1 , wherein the lens mounting leg is formed in a rib shape protruding toward the rear of the vehicle.

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