JP5105214B2 - Fog lights - Google Patents

Description

  The present invention relates to a fog lamp, and more particularly to a fog lamp using a light shielding hood.

  Conventionally, in a vehicular lamp using a bulb such as an incandescent bulb, a light shielding hood has been used to prevent glare caused by direct light from the bulb (see, for example, Patent Document 1).

  FIG. 12 is a diagram for explaining a configuration example of a vehicular lamp using a conventional light shielding hood.

  As shown in FIG. 12, a vehicular lamp 210 using a conventional light-shielding hood reflects light emitted from the light source 220 and the light source 220 to the rear of the vehicle and reflects a predetermined light distribution pattern by the reflected light. In order to prevent glare caused by direct light from the reflector 230 and the light source 220, a light shielding hood 240 having a cylindrical hood body 241 that covers the light source 220 is provided. The reflector 230 includes a reflection surface 231 that forms a light distribution, and a standing wall 232 that extends in the optical axis direction from the outer peripheral edge of the reflection surface 231. In addition to the hood body 241, the light shielding hood 240 includes a support portion 242 that fixes the hood body 241 and the reflector 230.

  In general, the shape of the light shielding hood 240 is determined by the shape of the reflector 230 and the light source 220 to be used. For example, the front side of the cylindrical hood main body 241 has a shape that has a notch so that no illusion light is generated by direct light from the light source 220. In addition, the rear side of the cylindrical hood main body has a cutout shape that prevents light from entering the standing wall 232 of the reflector 230.

JP 11-260114 A

  By the way, in recent standards for vehicle headlamps, for example, fog lamps, as shown in FIG. 13 (A), near the center of the main light distribution A, for confirmation of road signs installed on the road. The overhead sign light B is required.

  On the other hand, in another standard relating to fog lamps, as shown in FIG. 13B, the entire line (LINE 7) connecting the left 10 ° and the right 10 ° of the V line 6 ° below the H line is 2 below the H line. , 5 degrees V line is required to be less than 50% of the maximum luminous intensity of the entire line (LINE6) connecting 10 degrees to the left and 10 degrees to the right, and that the overhead sign light B is less than a predetermined luminous intensity.

  As described above, since the light distribution pattern changes greatly for each standard, each dedicated reflector is required, and the cost increases by having each reflector. Further, when the respective light distributions are compared, there is a problem that the user perceives that one of the light distributions is dark, resulting in a difference in feeling of use (feeling).

  The present invention has been made in view of such circumstances, and an object thereof is to provide a fog lamp capable of satisfying the requirements of LINE6 and LINE7 required by a predetermined standard.

In order to achieve the above object, a fog lamp according to the present invention prevents glare caused by direct light from a light source, a reflector that reflects irradiation light emitted from the light source toward the rear of the vehicle, and the front of the vehicle. Therefore, a light shielding hood having a cylindrical hood body covering the light source,
The reflector reflects the light emitted from the light source, and the vertical thickness is first at a position corresponding to LINE6 and LINE7 defined on the vehicle front screen by a predetermined standard. A first reflecting surface that displays a plurality of images of the light source having a thickness, and a light that is irradiated from the light source is reflected, and a vertical thickness is thinner than the first thickness at a position corresponding to only the LINE6. A second reflection surface that projects a plurality of images of the light source having a second thickness, and the light shielding hood includes a portion for limiting light incident on the first reflection surface from the light source. It is characterized by being.

  According to the fog lamp of the present invention, a portion (for example, a protrusion of the hood main body) for limiting light incident on the first reflecting surface (for example, a reflecting surface near the overhead reflecting surface) included in the light shielding hood from the light source. Since the light entering the first reflecting surface is restricted by the action, the light distributed to the LINE 6 and the LINE 7 is also restricted. However, since light from the second reflecting surface (for example, a reflecting surface away from the light source such as a filament) is not limited, light is distributed to the LINE 6. As a result, the difference in light quantity between LINE6 and LINE7 increases. Accordingly, it is possible to satisfy the requirements required by the standards regarding fog lamps, for example, the requirement that the luminous intensity of LINE7 is less than 50% of the maximum luminous intensity of LINE6.

  The LINE6 is, for example, a line connecting the left 10 ° and the right 10 ° of the V line 2.5 ° below the H line on the vehicle front screen, and the LINE7 is, for example, on the vehicle front screen. It is a line connecting the left 10 ° and the right 10 ° of the V line 6 ° below the H line.

  The reflector further includes an overhead reflection surface for reflecting light emitted from the light source to form overhead sign light, and the light shielding hood blocks light incident on the overhead reflection surface from the light source. It is preferable that the part for this is included.

  If it does in this way, the light distribution pattern applied to various regulations can be formed only by making a reflector common and attaching the hood from which a shape differs. In addition, since the reflector is shared, the cost can be greatly reduced. Moreover, since the light shielding hood controls the overhead light distribution of various light distribution patterns and / or the main light distribution of the various light distribution patterns, the light distribution pattern applied to various regulations can be easily formed.

  It is preferable that the overhead reflecting surface is provided in the first reflecting surface.

  If it does in this way, the light distribution pattern applied to various regulations can be formed only by making a reflector common and attaching the hood from which a shape differs. In addition, since the reflector is shared, the cost can be greatly reduced. Moreover, since the light shielding hood controls the overhead light distribution of various light distribution patterns and / or the main light distribution of the various light distribution patterns, the light distribution pattern applied to various regulations can be easily formed.

  Further, a protrusion is extended on the rear end side of the hood body, and the protrusion is a portion for limiting light incident on the first reflection surface from the light source of the light shielding hood and / or the overhead reflection surface. It is preferable to include a portion for blocking light incident on.

  If it does in this way, the light distribution pattern applied to various regulations can be formed only by making a reflector common and attaching the hood from which a shape differs. In addition, since the reflector is shared, the cost can be greatly reduced. Moreover, since the light shielding hood controls the overhead light distribution of various light distribution patterns and / or the main light distribution of the various light distribution patterns, the light distribution pattern applied to various regulations can be easily formed.

  According to the present invention, it is possible to provide a fog lamp that can satisfy the requirements of LINE6 and LINE7 required by a predetermined standard.

The perspective view from the front side of the vehicle lamp of this embodiment Sectional drawing which cut | disconnected the vehicle lamp shown in FIG. 1 by the vertical surface containing an optical axis Explanatory drawing which shows the example of the light shielding hood used for the vehicle lamp of this embodiment Explanatory drawing for demonstrating the light distribution pattern of the vehicle lamp of this embodiment Sectional drawing which cut | disconnected the other vehicle lamp of this embodiment by the vertical surface containing an optical axis Explanatory drawing which shows the example of the other light-shielding hood used for the vehicle lamp of this embodiment Explanatory drawing for demonstrating the light distribution pattern of the vehicle lamp of this embodiment Explanatory drawing which shows the state in which the light from a light emission part is reflected by a reflective surface, and is irradiated on main light distribution Explanatory drawing showing the relationship between filament image and light distribution pattern Explanatory drawing which shows the example of the other light-shielding hood used for the vehicle lamp of this embodiment Explanatory drawing for demonstrating the light distribution pattern of the vehicle lamp of this embodiment Sectional drawing which cut | disconnected the conventional vehicle lamp in the vertical surface containing an optical axis Explanatory drawing explaining the light distribution pattern required by regulations

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The present invention will be described with reference to the following preferred embodiments, but can be modified in many ways without departing from the scope of the present invention, and other embodiments than the present embodiment can be used. Can do. Accordingly, all modifications within the scope of the present invention are included in the claims.

  FIG. 1 is a perspective view from the front side of the vehicular lamp of the present embodiment. FIG. 2 is a cross-sectional view of the vehicular lamp shown in FIG. 1 cut along a vertical plane including the optical axis. FIG. 3 is an enlarged view of a light shielding hood used for a vehicle lamp.

  The vehicular lamp 100 according to the present embodiment is applied to a fog lamp of a vehicle such as an automobile, and includes a light chamber 10, a bulb 20, a reflector 30, and a light shielding hood 40 as shown in FIGS. Yes.

  The reflector 30 includes a reflecting surface 31 that forms a light distribution, a standing wall 32 that extends from the outer periphery of the reflecting surface 31 in the optical axis direction, and an opening 33 provided in the reflecting surface 31.

  The lamp chamber 10 is defined by a standing wall 32 of the reflector 30. The bulb 20 is a light source such as an incandescent lamp, a halogen lamp, or an HID, and is fixed to the reflector 30 while being inserted into the opening 33 of the reflector 30.

  The reflecting surface 31 of the reflector 30 reflects the irradiation light irradiated to the rear of the vehicle from the bulb 20 without being blocked by the light shielding hood 40, and forms a predetermined light distribution pattern (main light distribution) by the reflected light. This member is disposed on the rear end side of the lamp chamber 10. The reflecting surface 31 of the reflector 30 is, for example, a rotating paraboloid or a rotating paraboloid free-form surface whose focal point is the vicinity of the light emitting unit 21 such as a filament of the bulb 20. An opening 33 into which the bulb 20 is inserted is formed in a portion of the reflector 30 on the optical axis AX that extends in the vehicle front-rear direction.

  The light shielding hood 40 is a member that covers the valve 20 in order to prevent glare (dazzling light) due to direct light from the bulb 20, and the bulb 20 (the bulb 20 in a state of being inserted and fixed in the opening 33 of the reflector 30). ) Is inserted, and a support portion 42 (also referred to as a food stay) is provided. As shown in FIG. 1, the hood main body 41 is disposed on the optical axis AX by fixing the support portion 42 to the standing wall 32. The hood body 41 and the support portion 42 are, for example, regular reflectances such as an aluminum plated plate or a cold rolled steel plate (represented by the symbols SPCC, SPCC-T, SPCD, SPCE, SPCEN, etc. according to the Japanese Industrial Standards (JIS)). Is formed integrally by pressing and bending a relatively high metal plate. In addition, the light shielding hood 40 may be configured by forming the hood main body 41 and the support portion 42 separately and combining them.

  As shown in FIG. 2, an overhead reflection surface 34 is provided in a region above the reflection surface 31. The overhead reflecting surface 34 reflects the irradiation light irradiated to the rear of the vehicle from the bulb 20 without being blocked by the light shielding hood 40, and for confirming a road sign or the like installed on the road by the reflected light, It is a member for forming so-called overhead sign light near the center above the main light distribution.

  The overhead reflection surface 34 for overhead sign light has a different curvature and angle from the reflection surface 31 because the main light distribution is different from the irradiation area. Therefore, when the overhead reflecting surface 34 and the reflecting surface 31 are provided on one curved surface, a step 35 is generated at the boundary. In general, an undercoat and a metal vapor deposition film are formed on the surfaces of the reflective surface 31 and the overhead reflective surface 34. However, if there is a step 35, the undercoat accumulates in the vicinity thereof, and the shape of the reflective surface changes. As a result, there is a risk of causing a light distribution different from the intended light distribution control. That is, when forming a light distribution that does not use the overhead reflecting surface 34 in the vehicular lamp 100, the overhead reflecting surface 34 needs to be shielded by the light shielding hood 40. However, if the undercoat is accumulated, the step 35 is generated. Therefore, it is necessary to shield light from a region including the periphery (region larger than the overhead reflection surface 34 that should be shielded originally). In the present embodiment, since the step 35 is located at the upper end, when the portion where the undercoat accumulates is hidden by the hood body 41, the amount of hood extension can be minimized. Thereby, the problem of the light distribution control accompanying an undercoat can be solved.

  FIG. 4 shows a light distribution pattern formed by the vehicle lamp 100 described above. The reflecting surface 31 reflects the irradiation light irradiated from the bulb 20 to the rear of the vehicle without being blocked by the light shielding hood 40, and forms the main light distribution A by the reflected light. The overhead reflecting surface 34 reflects the irradiation light irradiated from the bulb 20 to the rear of the vehicle without being blocked by the light shielding hood 40, and forms the overhead sign light B near the center above the main light distribution A.

  FIG. 5 is a cross-sectional view taken along a vertical plane including the optical axis of a vehicle lamp provided with a reflector common to the vehicle lamp shown in FIGS. 1 and 2 and a light shielding hood having a different shape. FIG. 6 is an enlarged view of a light shielding hood used for a vehicle lamp.

  As shown in FIG. 5, the vehicular lamp 100 includes a lamp chamber 10, a bulb 20, a reflector 30, and a light shielding hood 60.

  The light shielding hood 60 includes a cylindrical hood main body 61 into which the valve 20 is inserted and a support portion 62. As shown in FIGS. 5 and 6, the hood main body 61 is provided with a protrusion 63 on the rear end side of the hood main body 61. That is, the difference between the hood main body 41 shown in FIG. 3 and the hood main body 61 shown in FIG. The protrusion 63 may be formed integrally with the hood body 61 or may be a separate member from the hood body 61. By providing the protrusion 63, it is possible to prevent the irradiation light emitted from the light emitting unit 21 from entering the overhead reflecting surface 34. Thereby, overhead sign light is not formed above the main light distribution.

  FIG. 7 shows a light distribution pattern formed by the vehicular lamp 100 shown in FIG. The reflecting surface 31 reflects the irradiation light irradiated from the bulb 20 to the rear of the vehicle without being blocked by the light shielding hood 60, and forms the main light distribution A by the reflected light. On the other hand, since the light from the bulb 20 is blocked by the protrusion 63, the overhead reflecting surface 34 cannot reflect the irradiated light forward of the vehicle. Therefore, the overhead sign light B is not formed near the center above the main light distribution A.

  By changing the light shielding hood, it is possible to easily switch between a light distribution pattern having overhead sign light and main light distribution and a light distribution pattern having main light distribution without overhead sign light. Therefore, it is possible to easily cope with regulations requiring a light distribution pattern including overhead sign light and main light distribution and regulations requiring a light distribution pattern including main light distribution without overhead sign light.

  Next, a method for controlling the light distribution pattern in the main light distribution by using different light shielding hoods will be described. FIG. 8 shows a state in which light from the light emitting unit 21 is reflected by the reflecting surface 31 and is irradiated onto the main light distribution. Since the light emitting unit 21 is configured by a filament or the like, it has a predetermined length along the optical axis. That is, the light from the light emitting unit 21 incident on the reflecting surface 31 projects a filament image on the main light distribution.

  In FIG. 8, the locus of light that is emitted from the light emitting unit 21 to the reflecting surface 31 and reflected near the overhead reflecting surface 34 on the upper surface of the reflecting surface 31 is indicated by a broken line 90. The locus of light that is emitted from the light emitting unit 21 to the reflecting surface 31 and reflected by the reflecting surface 31 that is away from the light emitting unit 21 is indicated by a one-dot chain line 80. As shown in FIG. 8, the light reflected in the vicinity of the overhead reflecting surface 34 is displayed as a relatively thick image 92 in the vertical direction on the main light distribution. On the other hand, the light reflected by the reflecting surface 31 away from the light emitting unit 21 is displayed as a relatively thin image 82 in the vertical direction on the main light distribution.

  FIG. 9 shows a plurality of filament images 82 and 92 on a light distribution pattern. The image 82 is concentrated near the horizontal line H of the light distribution pattern. The image 92 is irradiated so as to be perpendicular to the horizontal line H. When compared with the light distribution pattern in FIG. 13B, which is one of the standards for fog lamps, the image 82 is projected at a position corresponding to LINE6, and the image 92 is projected at a position corresponding to both LINE6 and LINE7. Can understand. The reflection surface in the vicinity of the overhead reflection surface excluding the overhead reflection distributes the light from the light emitting part to both LINE6 and LINE7 of the main light distribution, and the reflection surface away from the light emitting part emits the light to the LINE6 of the main light distribution. The light from the light is distributed. Based on the above principle, in a vehicular lamp having a reflecting surface that distributes light from the light emitting section to the main light distribution, by installing a light shielding hood that can adjust the amount of light near the overhead reflecting surface, The light distribution can be controlled.

  Next, the shape of the light shielding hood capable of controlling the main light distribution pattern will be described with reference to FIG. A light shielding hood 70 shown in FIG. 10A includes a hood main body 71 and a support portion 72. A protrusion 73 is provided on the hood main body 71. The difference between the hood body 71 shown in FIG. 10A and the hood body 61 shown in FIG. 6 is the size of the protrusion 73. The protrusion 73 is extended to the back (reflecting surface 31) side compared with the protrusion 63 shown with a dotted line. By making the protrusion 73 longer, in addition to the overhead reflection surface, the amount of light irradiated to the vicinity of the overhead reflection surface can be reduced.

  The protrusion 73 illustrated in FIG. 10B is formed thicker than the protrusion 63. By making the protrusion 73 thick, it is possible to reduce the amount of light irradiated to the vicinity of the overhead reflection surface in addition to the overhead reflection surface.

  The protrusion 73 shown in FIG. 10C is formed larger than the protrusion 63 indicated by a dotted line. By increasing the protrusion 73, it is possible to reduce the amount of light irradiated to the vicinity of the overhead reflection surface in addition to the overhead reflection surface.

  FIG. 11 shows a light distribution pattern when the light shielding hood 40 shown in FIG. 3 and the light shielding hood 70 shown in FIG. 10 (C) are used in a vehicle lamp. FIG. 11A shows a light distribution pattern when the light shielding hood 40 shown in FIG. 3 is used. In this case, since no protrusion is provided on the hood body, overhead sign light B is formed. In addition, since light near the overhead reflection surface and light from the normal reflection surface are reflected, a light distribution pattern corresponding to LINE6 and LINE7 is formed in the main light distribution A.

  FIG. 11B shows a light distribution pattern when the light shielding hood 70 shown in FIG. 10C is used. In this case, since a large protrusion is provided on the hood body, the incidence of light on the overhead reflecting surface and its vicinity is limited. Therefore, the overhead sign light B is not formed by the protrusion of the hood body. Further, since the light near the overhead reflecting surface is limited, the light distributed to the LINE6 and LINE7 is also limited. However, since the light from the reflecting surface away from the light emitting unit is not limited, the light is distributed to the LINE 6. As a result, the difference in light quantity between LINE6 and LINE7 increases. This makes it possible to satisfy the requirement that the luminous intensity of LINE7 be less than 50% of the maximum luminous intensity of LINE6.

  As described above, the vehicular lamp of the present invention can obtain a light distribution pattern applied to various laws and regulations by using a common reflector and changing the light shielding hood.

  DESCRIPTION OF SYMBOLS 100 ... Vehicle lamp, 10 ... Light chamber, 11 ... Inner wall, 20 ... Bulb, 21 ... Light emission part, 30 ... Reflector, 31 ... Reflecting surface, 32 ... Standing wall, 33 ... Opening, 34 ... Overhead reflecting surface, 40, 60 , 70 ... Light-shielding hood, 41, 61, 71 ... Hood body, 42, 62, 72 ... Supporting part, 63, 73 ... Projection

Claims (5)

A light source;
A reflector that reflects the irradiation light emitted from the light source toward the rear of the vehicle to the front of the vehicle;
In order to prevent glare caused by direct light from the light source, a light shielding hood having a cylindrical hood body covering the light source,
A fog lamp comprising:
The reflector reflects the light emitted from the light source, and a plurality of the light sources having a first thickness in the vertical direction at positions corresponding to LINE6 and LINE7 defined on the front screen of the vehicle by a predetermined standard. The light source that reflects the light irradiated from the light source and that has a second thickness smaller than the first thickness in a position corresponding to only the LINE6. A second reflecting surface for projecting a plurality of images,
The fog lamp, wherein the light shielding hood includes a portion for limiting light incident on the first reflecting surface from the light source. The LINE6 is a line connecting the left 10 ° and the right 10 ° of the V line 2.5 ° below the H line on the vehicle front screen,
2. The fog lamp according to claim 1, wherein the LINE 7 is a line connecting the left 10 ° and the right 10 ° of the V line 6 ° below the H line on the vehicle front screen. The reflector further includes an overhead reflecting surface for reflecting the light emitted from the light source to form overhead sign light,
The fog lamp according to claim 1, wherein the light shielding hood includes a portion for shielding light incident on the overhead reflecting surface from the light source.   4. The fog lamp according to claim 1, wherein the overhead reflecting surface is provided in the first reflecting surface. 5.   A protrusion extends on the rear end side of the hood main body, and the protrusion is incident on a portion for limiting light incident on the first reflecting surface from the light source of the light shielding hood and / or on the overhead reflecting surface. The fog lamp according to any one of claims 1 to 4, further comprising a portion for blocking light to be transmitted.