JP5454197B2 - Vehicle lighting - Google Patents

Description

  The present invention relates to a vehicular lamp such as a headlamp or a fog lamp that illuminates the front of an automobile, and more particularly to a vehicular lamp that suppresses glare and color unevenness and has improved appearance and quality. It is.

  This type of vehicle headlamp generally includes a lamp housing, a lamp lens disposed in front of the lamp housing, a lamp housing, and the like, as known in, for example, Patent Document 1 and Patent Document 2 A lamp chamber defined by a lamp lens; a light source bulb disposed in the lamp chamber; and a reflector disposed in the lamp chamber and reflecting light from the light source bulb toward the lamp lens.

  Further, as shown in FIG. 14, as a reflector, a reflector main body having a first reflecting surface 52 provided in the vicinity of a light source bulb 51 (hereinafter referred to as “light source 51”) and forming a predetermined light distribution pattern on the inner front surface. A reflector 56 having a hollow shape is also known which is integrally provided with a standing wall portion 55 provided on the extension of the reflector main body 53 and a second reflecting surface 54. In the lamp having the reflector 56, when the light source 51 is turned on, light from the light source 51 is reflected by the first reflecting surface 52 of the reflector main body 53 of the reflector 56, and the reflected light passes through a lamp lens (not shown). Irradiated outside with a predetermined light distribution pattern. The second reflecting surface 54 is seen as a part of the reflecting surface of the reflector 16 when not lit, and improves the appearance. Generally, the second reflecting surface 54 is used as a reflecting surface for generating a light distribution pattern during lighting. Not. However, actually, reflected light that affects the light distribution pattern is generated, and this reflected light contributes to glare, color unevenness, and the like.

  Further, as shown in FIG. 15A in the front view, the reflector 54 swells in the left-right direction along the horizontal line H passing through the bulb center O1 of the light source 51, and (b) of FIG. ), A structure that swells in the vertical direction along the vertical line V passing through the bulb center O1 of the light source 51 and is formed into a vertically long and flat circular shape, and further a structure that is formed into a quadrilateral other than a circle, Alternatively, there is a circular shape, for example, a structure in which only the lower portion is cut out. In general, the standing wall portions 55 of the reflectors 54 are provided as a flat plane between the reflector main body 53 and the front opening 57.

Japanese Utility Model Publication No. 6-13005 JP 2003-249103 A

  However, for example, in the vehicular lamp using the horizontally long flat circular reflector 54 shown in FIG. 15A, the front is irradiated when the vehicle travels as shown in the light distribution pattern in FIG. Light 61 (which causes glare that becomes dazzling light on the oncoming vehicle and color unevenness in the road surface light, etc. on both the left and right portions of the light distribution characteristics (hereinafter referred to as “effective light distribution pattern 60”) Hereinafter, there is a problem that “unnecessary light 61” is produced and the appearance and quality are deteriorated.

On the other hand, in the vehicular lamp using the vertically long and flat circular reflector 54 shown in FIG. 15B, as shown in FIG. 16B, the upper part of the effective light distribution pattern 60 is formed. There is a problem that the unnecessary light 61 that causes the glare and the color unevenness is produced, and the appearance and quality are deteriorated.

  This problem is the same for shapes other than the flat circular shape, for example, the structure formed in the above-described quadrilateral shape.

  As a method for solving this problem, conventionally, the first reflecting surface is provided with a plurality of curved surfaces or a knurling, for example, to suppress glare and uneven color, but this method also has a strong light quantity. The product could not suppress sufficient glare and uneven color.

  As a result of pursuing problems such as glare and color unevenness, the applicants of the present invention are provided as a plane in which the standing wall portion 55 of the reflector 54 extends straight from the reflector main body 53 toward the front opening 57. For this reason, it has been found that the light incident on and reflected from the second reflecting surface 54 of the standing wall 55 from the light source 51 is irradiated directly through the lamp lens without being controlled.

  Therefore, the present invention has been made in view of these points, and provides a vehicular lamp that can suppress unnecessary light that causes glare, uneven color, and the like, and that improves appearance and quality. Objective.

  In order to solve the above problems, a vehicle lamp according to the present invention is a vehicle lamp having a light source and a reflector for irradiating light from the light source forward. The reflector is provided in the vicinity of the light source and has a predetermined A first reflecting surface forming a light distribution pattern and a second reflecting surface formed on a standing wall provided on an extension of the first reflecting surface, and the second reflecting surface is formed with a convex curved surface. The curvature of the surface on the horizontal line or the vertical line passing through the center of the light source is larger than the curvature of one of the surfaces.

  According to this configuration, the second reflecting surface is formed as a convex curved surface, and the curvature of the surface on the horizontal line or the vertical line passing through the center of the light source is larger than the curvature of one of the surfaces. The light reflected by the second reflecting surface is controlled to be dispersed. Thereby, compared with the reflector with the structure where the conventional 2nd reflective surface makes a plane, the unnecessary light which causes glare, color irregularity, etc. can be controlled.

  The said structure WHEREIN: The said 2nd reflective surface can employ | adopt the structure formed so that the curvature on the horizontal line or vertical line which passes along the center of the said light source might become the minimum.

  According to this configuration, a vehicular lamp including a reflector having a horizontally long flat circular shape that swells in the left-right direction along the horizontal line, and a vehicular lamp including a reflector having a vertically long circular shape that swells in the vertical direction along the vertical line. However, it is possible to control and suppress unnecessary light, which has conventionally caused glare, color unevenness, and the like, to be distributed on a convex curved surface.

  In the above configuration, a configuration in which an extension having a reflection surface formed by a convex curved surface having substantially the same curvature as the second reflection surface is provided on the inner surface in front of the opening of the reflector.

  According to this configuration, even if the extension having the reflection surface is provided in front of the opening of the reflector, the convex light on the reflection surface of the extension disperses unnecessary light that causes glare, uneven color, etc. Can be controlled and suppressed.

  According to the present invention, the second reflection surface is formed with a convex curved surface, and the light reflected by the second reflection surface is controlled by the shape of the convex curved surface, thereby suppressing the causes of glare and color unevenness. Therefore, glare, color unevenness and the like are reduced, and an effect of improving appearance and quality can be obtained.

It is a cross-sectional view of the vehicular lamp showing an embodiment of the present invention. It is the perspective view which showed 1st Example of the reflector in a vehicle lamp same as the above. It is a front view of the reflector in 1st Example same as the above. FIG. 4 is a sectional view taken along line AA in FIG. 3. FIG. 4 is a sectional view taken along line BB in FIG. 3. It is the figure which showed an example of the light distribution pattern obtained with the vehicle lamp using the reflector of 1st Example same as the above. It is the perspective view which showed 2nd Example of the reflector in a vehicle lamp same as the above. It is a front view of the reflector in 2nd Example same as the above. It is CC sectional view taken on the line of FIG. It is the DD sectional view taken on the line of FIG. It is the figure which showed an example of the light distribution pattern obtained with the vehicle lamp using the reflector of 2nd Example same as the above. It is a figure explaining the modification of the reflector in a vehicle lamp same as the above, and is a perspective view of the reflector. It is a figure explaining the modification of the reflector in a vehicle lamp same as the above, and is a front view of the reflector. It is longitudinal cross-sectional explanatory drawing of the reflector in the conventional vehicle lamp. It is front explanatory drawing which showed an example of the conventional reflector, (a) is a horizontally long flat circular reflector, (b) has shown the vertically long flat circular reflector. FIGS. 15A and 15B are diagrams illustrating an example of a light distribution pattern in a vehicular lamp using a conventional reflector, where FIG. 15A illustrates a light distribution pattern when the reflector illustrated in FIG. 15A is used, and FIG. Each of the light distribution patterns when the reflector shown in b) is used is shown.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the accompanying drawings. Note that the same number is assigned to the same element throughout the description of the embodiment.

  FIG. 1 is a cross-sectional view of a vehicle headlamp shown as an embodiment of a vehicle lamp of the present invention. In the figure, a vehicle headlamp 11 is an example of a headlamp of an automobile, and includes a lamp housing 12, a lamp lens 13 disposed in front of the lamp housing 12, and the lamp housing 12 and the lamp lens 13. A defined lamp chamber 14, a light source bulb (for example, a halogen lamp) 15 disposed in the lamp chamber 14, and a lamp chamber 13 that reflects light from the light source bulb 15 toward the lamp lens 13. And a reflector 16 to be provided. Further, an inner panel (or inner housing) 18 having an extension 17 formed on the front side of the reflector 16 is disposed in the lamp chamber 14, and a rubber cap 19 is provided between the light source bulb 15 and the lamp housing 12. Is arranged.

  The reflector 16 has a more detailed structure shown in FIGS. 2 to 5 as a first embodiment of the reflector 16. A vehicle headlamp 11 in which the reflector 16 shown in FIGS. 2 to 5 is applied to the reflector 16 of FIG. 1 will be further described below with reference to FIGS. The reflector 16 according to the first embodiment has a hollow shape as shown in FIG. As shown in FIG. 3, the reflector 16 has a horizontal width along a horizontal line H passing through the bulb center O1 of the light source bulb 15 as viewed from the front direction, and a vertical line V passing through the bulb center O1 of the light source bulb 15. And a reflector main body 21 having a horizontally long flat circular shape that is larger than the vertical width along the horizontal direction and bulging in the left-right direction as a whole, and provided with a first reflective surface 21a with an aluminum vapor deposition or silver coating on the inner surface. The first reflecting surface 21a is integrally provided with a standing wall portion 22 that extends integrally from the front end to the opening 23, and is provided with a second reflecting surface 22a that is similarly subjected to aluminum vapor deposition or silver coating on the inner surface. Yes. In addition, the standing wall part 22 in this example is provided in the state located in front of the vehicle with respect to the position of the light source bulb 15.

  In the reflector 16, when the light source bulb 15 is turned on, the light from the light source bulb 15 is reflected by the first reflecting surface 21 a of the reflector body 21, and the reflected light passes through the lamp lens 13 to the outside and has a predetermined light distribution pattern. Irradiated with. The second reflecting surface 22a of the standing wall portion 22 is seen as a part of the reflecting surface of the reflector 16 when not lit, and improves the appearance, and is used as a reflecting surface that generates a light distribution pattern when lit. Not. That is, the second reflecting surface 22a of the standing wall portion 22 is a dummy portion of the reflecting surface of the reflector 16, and does not directly contribute to the light distribution pattern, but rather is formed by light reflected by the first reflecting surface 21a. When the reflected light reflected by the second reflecting surface 22a is mixed into the light distribution pattern, the light often adversely affects the light distribution characteristics and often causes glare, color unevenness, and the like. Therefore, it is preferable that the reflected light reflected by the second reflecting surface 22a is not mixed into the light distribution pattern formed by the light reflected by the first reflecting surface 21a.

  Therefore, in the reflector 16 in the first embodiment, the inner surface of the upright wall portion 22, that is, the second reflecting surface 22a, is formed so that the section from the front end of the first reflecting surface 21a to the opening portion 23 has a gentle convex curved surface. The entire reflector 16 is formed in a trumpet shape, and the reflected light reflected by the second reflecting surface 22a is dispersed so that the light reflected by the first reflecting surface 21a is not clearly mixed. Further, in the second reflecting surface 22a, the curvature R1 in the portion 22A on the horizontal line H passing through the bulb center O1 of the light source bulb 15 is minimum (see FIG. 4), and on the vertical line V passing through the bulb center O1 of the light source bulb 15. It is formed as a gradually changing surface that gradually changes along the circumferential direction so that the curvature R2 of the portion 22B becomes maximum (see FIG. 5). The curvature R1 and the curvature R2 differ depending on the inner diameter of the standing wall portion 22 and the length from the front end of the first reflecting surface 21a to the opening portion 23, respectively.

  An inner panel 18 having an extension 17 disposed on the front side of the reflector 16 has a content structure from the lamp lens 13, for example, an optical axis adjusting mechanism (not shown) disposed on the rear part of the reflector 16 in the lamp chamber 14, a breathing A mechanism, a wiring mechanism, and the like are shielded from being seen, and light is prevented from leaking in directions other than a predetermined direction. The outer surface of the inner panel 18 and the inner surface of the extension 17 are subjected to aluminum vapor deposition or silver coating. The opening shape of the extension 17 substantially matches the opening shape of the reflector 16 when viewed from the front, and the inner surface shape from the rear opening 24 to the front opening 25 has a cross section in the direction along the optical axis O as the reflector. 16 is formed with a convex curved surface having substantially the same curvature as that of the second reflecting surface 22a.

  In the vehicle headlamp 11 formed in this way, when the light source bulb 15 is turned on, the light from the light source bulb 15 is reflected by the first reflecting surface 21a, and the reflected light passes through the lamp lens 13 and is given to the outside. Irradiate with a light distribution pattern. Further, the light reflected by the first reflecting surface 21 a and incident on the second reflecting surface 22 a and the extension 17 and reflected is controlled by the convex curved surfaces of the second reflecting surface 22 a and the extension 17 to be suppressed.

  FIG. 6 shows an example of a light distribution pattern of the vehicle headlamp 11 using the reflector 16 in the first embodiment shown in FIGS. 2 to 5, that is, a reflector having a horizontally long flat shape when viewed from the front direction. An example of the light distribution pattern in the vehicle headlamp 11 is shown. Therefore, when comparing the light distribution pattern shown in FIG. 6 and the light distribution pattern in the conventional vehicle headlamp shown in FIG. 16A, the light distribution pattern of the vehicle headlamp in the present invention is the conventional one. It can be seen that the unnecessary light 61 that causes glare and color unevenness, which has been a problem with the vehicle headlamps, is suppressed and reduced. Thereby, the vehicular headlamp 11 of the present invention using the reflector 16 in the first embodiment is improved in appearance and quality.

  Further, in the reflector 16 of the present embodiment, the curvature R1, R2 of the second reflecting surface 22a provided in the standing wall 22 in a state where the standing wall 22 is positioned in front of the vehicle with respect to the position of the light source bulb 15. Since the starting point of the light source bulb 15 is located in front of the vehicle with respect to the position of the light source bulb 15, more intense light from the light source bulb 15 can be incident on the first reflecting surface 21a for maximum use. In addition, strong light from the light source bulb 15 can be prevented from entering the second reflecting surface 22a. As a result, it is possible to eliminate the generation of unnecessary light 61 that causes glare, uneven color, and the like, which has been a problem with conventional vehicle headlamps, and contributes to improvement in appearance and quality.

  7 to 10 show a second embodiment of the reflector 16 used for the reflector 16 of the vehicle headlamp 11 shown in FIG. Therefore, in the following description, it demonstrates as the vehicle headlamp 11 which uses the reflector of 2nd Example.

  In the reflector 16 of the second embodiment, the width in the left-right direction along the horizontal line H passing through the bulb center O1 of the light source bulb 15 as viewed from the front is the same as the vertical line V passing through the bulb center O1 of the light source bulb 15. A reflector main body 21 having a first reflecting surface 21a that is smaller than the width in the direction and has a vertically oblong circular shape that swells in the vertical direction as a whole, and on the inner surface of which aluminum deposition or silver coating is applied; It integrally has a standing wall portion 22 that extends integrally from the front end of the reflecting surface 21a to the opening 23, and that has a second reflecting surface 22a that is similarly provided with aluminum deposition or silver coating on the inner surface. In addition, the standing wall part 22 in this example is also provided in the state located in front of the vehicle with respect to the position of the light source bulb 15.

  In the reflector 16 in the second embodiment, the inner surface of the upright wall portion 22, that is, the second reflecting surface 22a, has a gently convex convex curve between the front end of the first reflecting surface 21a and the opening 23. The entire reflector 16 is formed in a trumpet shape, and the reflected light reflected by the second reflecting surface 22a is dispersed so that the light reflected by the first reflecting surface 21a is not clearly mixed. Further, in the second reflecting surface 21a, the curvature R1 in the portion 22A on the horizontal line H passing through the light source bulb 15 bulb center O1 is the maximum (see FIG. 9), and the portion on the vertical line V passing through the light source bulb 15 bulb center O1. It is formed as a gradually changing surface that gradually changes along the circumferential direction so that the curvature R2 at 22B is minimized (see FIG. 10). Here, the curvature R1 and the curvature R2 are also different depending on the inner diameter of the standing wall portion 22 and the length from the front end of the first reflecting surface 21a to the opening 23.

  In the vehicle headlamp 11 using the reflector 16 in the second embodiment formed as described above, when the light source bulb 15 is turned on, the light from the light source bulb 15 is reflected by the first reflecting surface 21a and the reflected light thereof. Irradiates to the outside through a lamp lens 13 with a predetermined light distribution pattern. Further, the light reflected by the first reflecting surface 21 a and incident on the second reflecting surface 22 a and the extension 17 and reflected is controlled by the convex curved surfaces of the second reflecting surface 22 a and the extension 17 to be suppressed.

  FIG. 11 shows an example of a light distribution pattern of the vehicle headlamp 11 using the reflector 16 in the second embodiment shown in FIGS. 7 to 10, that is, a vehicle using a vertically flattened reflector. An example of the light distribution pattern in the headlamp 11 is shown. Therefore, when comparing the light distribution pattern shown in FIG. 11 with the light distribution pattern in the conventional vehicle headlamp shown in FIG. 16B, the light distribution pattern of the vehicle headlamp in the present invention is the conventional one. It can be seen that the unnecessary light 61 that causes glare and color unevenness, which has been a problem with the vehicle headlamps, is suppressed and reduced. As a result, the vehicular headlamp 11 of the present invention using the reflector 16 in the second embodiment is improved in appearance and quality.

  In the above-described embodiment, the reflector formed in a flat circle has been described. However, the present invention is not limited to the reflector formed in a flat circle, and may be a circular shape, a square shape, or a circular shape. The present invention can be similarly applied to a reflector having a structure in which only the lower portion is cut out, such as the reflector 16 shown in FIG. That is, the reflector 16 shown in FIGS. 12 and 13 is a reflector 16 having a vertically long and flat circular shape, and is provided with a horizontal portion 26 cut at the lower portion. Further, the portion of the second reflecting surface 22a corresponding to the horizontal portion 26 also has a gentle gap between the front end of the first reflecting surface 21a and the opening 23 so as to disperse the reflected light on the two reflecting surfaces 22a. The shape is a convex curved surface.

  As mentioned above, although this invention was demonstrated using embodiment, it cannot be overemphasized that the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiments. Further, it is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 11 Vehicle headlamp 12 Lamp housing 13 Lamp lens 14 Lamp chamber 15 Light source bulb 16 Reflector 17 Extension 18 Inner panel 19 Rubber cap 21 Reflector main-body part 21a 1st reflective surface 22 Standing wall part 22a 2nd reflective surface 23 Opening part 24 Rear part Opening 25 Front opening H Horizontal line V Vertical line R1, R2 Curvature O Optical axis O1 Valve center

Claims (2)

In a vehicle lamp having a light source and a reflector for irradiating light from the light source forward,
The reflector is provided in the vicinity of the light source and forms a predetermined light distribution pattern; and
A second reflecting surface formed on a standing wall provided on the extension of the first reflecting surface;
The second reflecting surface is formed as a convex curved surface and is circumferentially arranged so that the curvature of the surface on the horizontal line or the vertical line passing through the bulb center of the light source is minimum and the curvature of the surface on the other side is maximum. It is a flat circle with a gradually changing surface that gradually changes along,
The vehicular lamp , wherein a starting point of curvature of the second reflecting surface is provided on an opening side of the reflector on an extension of the first reflecting surface from a position of a light source . Before the front KiHiraki opening, vehicle lamp according to claim 1, characterized in that a extension having a reflecting surface formed by forming a convex curved surface having substantially the same curvature as the the inner surface second reflecting surface .

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