JP2017062910A - Vehicular backup light - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular backup light capable of suppressing occurrence of a dark portion in a front region on the road with respect to a vehicle rear end part.SOLUTION: A vehicular backup light includes: a light source 22 for emitting light downward; a reflection surface 28a for main light distribution provided below the light source 22, and for reflecting the light from the light source 22 toward the vehicle rear; a top surface reflection surface 28b provided at the backside above so as not to shield the light from the light source 22 entering the reflection surface 28a for main light distribution; an additional reflection surface 28c for reflecting at least one part of the light which does not enter the reflection surface 28a for main light distribution out of the light from the light source 22 toward the top surface reflection surface 28b; and a lens 26 in which the reflection light from the reflection surface 28a for main light distribution and the top surface reflection surface 28b transmits. It is constituted so that the light of the reflection surface 28a for main light distribution irradiates the place farther than the front region on a road R with respect to the vehicle rear end part, and the light of the additional reflection face 28c irradiates the front region.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a reverse lamp for a vehicle.

  2. Description of the Related Art Conventionally, there is known a vehicular reverse lamp including a light source (bulb) and a reflective surface (reflector) that reflects light from the light source backward (see, for example, Patent Document 1).

Japanese Patent No. 39730767

  However, in the vehicular reverse lamp having the above configuration, the light from the light source reflected by the reflecting surface is irradiated downward at a predetermined angle (for example, about 15 degrees with respect to the horizontal direction) with respect to the horizontal direction. It is difficult to irradiate the front area on the road surface with respect to the end portion, and it results in irradiating farther than the front area on the road surface with respect to the rear end portion of the vehicle. This causes a problem that a dark feeling is given to the driver.

  The present invention has been made in view of such circumstances, and can suppress the occurrence of dark (dark parts) in the front area on the road surface with respect to the rear end of the vehicle (as a result, the driver or the like has a dark feeling). It is an object to provide a reverse lamp for a vehicle that can be improved.

  In order to achieve the above object, according to one aspect of the vehicle reverse lamp according to the present invention, in the vehicle reverse lamp provided at the rear end portion of the vehicle, a light source that emits light downward and light from the light source are incident. The main light distribution reflecting surface is provided below the light source and reflects the light from the light source toward the rear of the vehicle, and the light from the light source incident on the main light distribution reflecting surface is not blocked. A top surface reflecting surface provided behind and above the main light distribution reflecting surface, and at least a part of the light from the light source that does not enter the main light distribution reflecting surface. An additional reflection surface that reflects toward the top surface reflection surface; and a main light distribution reflection surface and a lens that transmits reflected light from the top surface reflection surface, and the main light distribution reflection surface includes: The light from the light source reflected by the main light distribution reflecting surface and transmitted through the lens is reflected by the vehicle. The additional reflection surface is configured to irradiate a far region on the road surface with respect to the rear end portion, and the additional reflection surface is reflected by the additional reflection surface and the top surface reflection surface in this order and is transmitted from the light source that passes through the lens. Light is configured to irradiate the near region.

  According to this aspect, it is possible to suppress the occurrence of dark (dark part) in the front area on the road surface with respect to the rear end of the vehicle (as a result, it is possible to improve the dark feeling to the driver or the like). Can be provided.

  This is because the light from the light source that is reflected in this order by the additional reflection surface and the top surface reflection surface and passes through the lens irradiates a front area on the road surface with respect to the rear end portion of the vehicle.

  In the above aspect of the vehicle backward lamp according to the present invention, the light source may be a semiconductor light emitting element arranged to emit light downward.

  Further, in the above aspect of the vehicle reverse lamp according to the present invention, the main light distribution reflecting surface further includes at least a reflector body and a reflector including a top surface extending from the upper end edge of the reflector body toward the rear of the vehicle. Provided in the reflector body, the top surface reflecting surface is provided on the top surface, and a through hole is formed in the top surface through which light from the light source incident on the reflecting surface for main light distribution passes. It may be.

  In the above aspect of the vehicle reverse lamp of the present invention, the main light distribution reflecting surface may be constituted by a plurality of reflecting regions.

  Moreover, in the said aspect of the reverse lamp for vehicles of this invention, the said additional reflective surface may be provided in the lower end part vicinity of the said reflective surface for main light distribution.

  Moreover, in the said aspect of the reverse lamp for vehicles of this invention, the said additional reflective surface may be provided in the at least 1 level | step-difference part among the level | step-difference parts between these reflective areas.

  ADVANTAGE OF THE INVENTION According to this invention, the reverse lamp for vehicles which can suppress that dark (dark part) generate | occur | produces in the near area | region on the road surface with respect to a vehicle rear end part (as a result can improve giving a dark feeling to a driver | operator etc.). It becomes possible to provide.

(A) It is a perspective view of 10 L of vehicle reverse lamps which are one Embodiment of this invention, (b) It is a partial expansion perspective view of the vicinity of the additional reflective surface 28c. It is a figure (bird's-eye view) showing a mode that the road surface with respect to a vehicle rear-end part is irradiated with the light from the reverse lamp 10 (10L, 10R) for vehicles. (A) The longitudinal cross-sectional view of 20 A of lamp units, (b) The figure (side view) showing a mode that the light from the reverse lamp 10 for vehicles is irradiating on the road surface. (A) (b) It is a figure for demonstrating the preparation procedure of the additional reflective surface 28c. (A) The longitudinal cross-sectional view of the vehicle reverse lamp of a comparative example, (b) The figure (side view) showing a mode that the light from the vehicle reverse lamp of a comparative example is irradiating on the road surface. It is a figure (bird's eye view) showing a mode that the road surface with respect to a vehicle rear-end part is irradiated with the light from the reverse lamp for vehicles of a comparative example. It is a figure showing the modification of the additional reflective surface 28c. It is a modification of the reverse lamp 10 for vehicles.

  Hereinafter, a reverse lamp for a vehicle which is an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1A is a perspective view of a vehicular reverse lamp 10L according to an embodiment of the present invention. The vehicle reverse lamp 10L shown in FIG. 1A is provided at the left end portion of the vehicle rear end portion toward the front of the vehicle. Among the rear end portions of the vehicle, a vehicle reversing lamp 10R (not shown) provided at the right end toward the front of the vehicle is equivalent to a vehicle reversing lamp 10L that is reversed left and right, and is substantially the same as the vehicle reversing lamp 10L. In the following, the vehicular reverse lamp 10L will be described as a representative.

  FIG. 2 is a view (bird's eye view) showing a state in which light on the road surface with respect to the rear end portion of the vehicle is irradiated with light from the vehicle reverse lamp 10 (10L, 10R). The vertical axis in FIG. 2 represents the distance from the rear end of the vehicle toward the rear of the vehicle, and the horizontal axis represents the distance from the center line extending in the vehicle front-rear direction to the left-right direction.

  As shown in FIG. 1A, the vehicular reverse lamp 10L of the present embodiment is configured by three lamp units 20A, 20B, and 20C.

  Since the configuration of each of the lamp units 20A to 20C is common, the lamp unit 20A disposed at the left end in FIG. 1 will be described as a representative.

  FIG. 3A is a longitudinal sectional view of the lamp unit 20A, and FIG. 3B is a diagram (side view) showing a state in which light from the vehicular backward lamp 10 is radiated on the road surface.

  As shown in FIG. 3A, the lamp unit 20A covers a light source 22 that emits light downward, a reflector 24 provided below the light source 22, and an opening of the reflector 24 that opens toward the rear of the vehicle. And a lens 26 provided in a state of being attached.

  The lens 26 is a substantially flat transparent cover, and is arranged in a slanted state, that is, in an inclined state so that the upper end portion 26a is on the front side of the vehicle and the lower end portion 26b is on the rear side of the vehicle. Yes.

The light source 22 is a semiconductor light emitting device such as a white LED light source including an LED chip having a size of about 1 mm square and a phosphor (not shown) covering the LED chip, and is made of metal so as to emit light downward. In a state of being held by a holding member (not shown) such as a substrate, it is disposed in the vicinity of the focal point F of the reflector 24 (the main light distribution reflecting surface 28a). Optical axis AX ₂₂ of the light source 22 may be coincident to the vertical line, it may be inclined with respect to the vertical line. Optical axis AX ₂₂ of the light source 22 passes through substantially the center of the light emitting surface, and extends perpendicular to the emitting surface. The light source 22 may be a bulb light source such as an incandescent light bulb or other light source.

  The reflector 24 is provided below the light source 22 so that the light from the light source 22 is incident thereon, and includes a main light distribution reflecting surface 28a that reflects the light from the light source 22 toward the rear of the vehicle.

  A top surface reflection surface 28b is provided behind and above the main light distribution reflection surface 28a so as not to block light from the light source 22 incident on the main light distribution reflection surface 28a.

  In the vicinity of the lower end portion of the main light distribution reflecting surface 28a, additional reflection that reflects at least part of the light from the light source 22 that does not enter the main light distribution reflecting surface 28a toward the top surface reflecting surface 28b. A surface 28c is provided.

  Specifically, the reflector 24 includes a reflector main body 24a, a top surface 24b extending from the upper end edge of the reflector main body 24a toward the rear of the vehicle, and a reflector rib 24c extending from the lower end edge of the reflector 24 toward the rear of the vehicle.

  The main light distribution reflection surface 28a is provided on the rear surface of the reflector body 24a, the top reflection surface 28b is provided on the lower surface of the top surface 24b, and the additional reflection surface 28c is the lower end of the main light distribution reflection surface 28a. It is provided near the part.

  Each of the reflecting surfaces 28a to 28c is constituted by a reflecting surface formed by metal deposition such as aluminum on the inner surface of the reflector 24 (the vehicle rear side surface of the reflector body 24a, the lower surface of the top surface 24b, the upper surface of the reflector rib 24c, etc.). ing. Of course, not limited to this, each of the reflecting surfaces 28 a to 28 c may be a reflecting member such as a mirror attached to the reflector 24.

  The top surface 24b is a plate-like member extending from the upper end edge of the reflector main body 24a toward the rear of the vehicle, and a portion near the main light distribution reflection surface 28a is from the light source 22 incident on the main light distribution reflection surface 28a. A through hole H through which light passes is formed. The light source 22 is disposed near the upper portion of the through hole H. The light source 22 may be arranged in a state where part or all of the light source 22 is located in the through hole H. The light from the light source 22 passes through the through hole H and enters the main light distribution reflecting surface 28a and the additional reflecting surface 28c.

  The main light distribution reflecting surface 28a is provided below the light source 22 so that the light from the light source 22 is incident thereon, and reflects the light from the light source 22 toward the rear of the vehicle. The main light distribution reflecting surface 28a is reflected from the main light distribution reflecting surface 28a, and the light RayA from the light source 22 that passes through the lens 26 is from a front region on the road surface R with respect to the rear end of the vehicle (lamp unit 20A). It is configured to irradiate far away (see FIG. 3B).

Specifically, the main light distribution reflecting surface 28a is a single focus surface, that is, a rotating paraboloid (or a similar free-form surface) with the focal point F set in the vicinity of the light source 22, and its optical axis AX _28a. (Rotating shaft) is arranged in a state of extending rearward and obliquely downward. The main light distribution reflection surface 28a is divided into a plurality of vertical lines (for example, vertical lines) and a plurality of horizontal lines (for example, horizontal lines) as viewed from the front thereof, and a plurality of reflection regions m1, m1,. Contains

  Each reflection area m1, m1,... Is reflected by each reflection area m1, m1,..., And the light RayA from the light source 22 that passes through the lens 26 and travels toward the rear of the vehicle is distributed in the target direction. .., Of the area far from the front area on the road surface R with respect to the rear end of the vehicle.

  FIG. 1B is a partially enlarged perspective view in the vicinity of the additional reflection surface 28c.

  The additional reflection surface 28c is provided in the vicinity of the lower end portion of the main light distribution reflection surface 28a and reflects light from the light source 22 toward the top surface reflection surface 28b. The additional reflection surface 28c is reflected by the additional reflection surface 28c and the top surface reflection surface 28b in this order, and the light RayB from the light source 22 that passes through the lens 26 is on the road surface R in front of the vehicle rear end (lamp unit 20A). The region is irradiated (see FIG. 3B).

  Specifically, the additional reflection surface 28c is a reflection surface that is not mounted (not included) on the single focus surface (main light distribution reflection surface 28a), and has a plurality of vertical lines (for example, vertical lines) as viewed from the front. ), And a plurality of reflection regions m2, m2,... Formed (see FIG. 1B).

  Each of the reflective areas m2, m2,... Is reflected by the respective reflective areas m2, m2,..., And the light from the light source 22 that passes through the lens 26 and travels toward the rear of the vehicle is distributed in the target direction. Of the front area on the road surface R with respect to the rear end portion of the vehicle, each of the reflection areas m2, m2,...

  Specifically, the additional reflection surface 28c can be configured as follows.

  FIG. 4A and FIG. 4B are diagrams for explaining a procedure for creating the additional reflection surface 28c.

  First, as shown in FIG. 4 (a), points p1, p1,... To be aimed at in the near area on the road surface R with respect to the rear end of the vehicle are determined, and then, as shown in FIG. 4 (b), In consideration of the refractive index of the lens 26 from the points p1, p1,..., The points p2, p2,. The additional reflection surface 28c is configured to coincide with the points p2, p2,... With respect to the surface reflection surface 28b and the angle θ of the light beam. The additional reflection surface 28c can be configured by executing the above procedure using a predetermined software program.

  Other lamp units 20B and 20C can be configured in the same manner as described above.

  In addition, since the area | region which each lamp unit 20A-20C (additional reflection surface 28c) takes charge of among the near area | regions on the road surface R with respect to a vehicle rear end part differs from each other, the additional reflection surface of each lamp unit 20A-20C The size and shape of 28c are different from each other (see FIG. 1A).

  According to the present embodiment, it is possible to suppress the occurrence of dark (dark part) in the near area on the road surface R with respect to the rear end of the vehicle (as a result, it is possible to improve the darkness of the driver etc.). Lamps can be provided.

  This is because the light RayB from the light source 22 that is reflected in this order by the additional reflection surface 28c and the top surface reflection surface 28b and passes through the lens 26 irradiates a near region on the road surface R with respect to the rear end portion of the vehicle. .

  Next, in order to confirm this effect, the simulation results (comparative examples and examples) performed by the present inventors using a predetermined software program will be described.

<Comparative example>
FIG. 5A is a longitudinal sectional view of a vehicle reverse lamp according to a comparative example, and FIG. 5B is a diagram (side view) illustrating a state in which light from the vehicle reverse lamp according to the comparative example irradiates the road surface. It is. FIG. 6 is a diagram (bird's eye view) showing a state in which light on a road surface with respect to the rear end portion of the vehicle is irradiated with light from a vehicle backward lamp according to a comparative example. The vertical axis in FIG. 6 represents the distance from the rear end of the vehicle toward the rear of the vehicle, and the horizontal axis represents the distance from the center line extending in the vehicle front-rear direction to the left-right direction.

  As shown in FIG. 5 (a), the vehicle reverse lamp of the comparative example is the same as the vehicle reverse lamp 10 except that the additional reflecting surface 28c is omitted from the vehicle reverse lamp 10 (10L, 10R). It is configured.

  When the additional reflection surface 28c is not provided as in this comparative example, as shown in FIG. 5 (b), a farther area than the front area on the road surface R with respect to the rear end portion of the vehicle is irradiated. As a result of being blocked by the reflector rib 24c and not irradiating the front area, as shown in FIG. 6, dark D (dark part) occurs in the front area on the road surface R with respect to the rear end of the vehicle (as a result, the driver or the like It gives a dark feeling).

<Example>
The vehicle reverse lamp of the embodiment is configured in the same manner as the vehicle reverse lamp 10.

  When the additional reflection surface 28c is provided as in the present embodiment, as shown in FIG. 3B, the far area on the road surface R with respect to the rear end of the vehicle is irradiated and the front area is also irradiated. As a result, as shown in FIG. 2, it is possible to suppress the occurrence of dark (dark part) in the near area on the road surface R with respect to the rear end part of the vehicle (as a result, it is possible to improve giving the driver a dark feeling). I understand.

  Next, a modified example will be described.

  FIG. 7 shows a modification of the additional reflection surface 28c.

  In the above embodiment, the additional reflection surface 28c is illustrated in the vicinity of the lower end portion of the main light distribution reflection surface 28a. However, the present invention is not limited to this, and as shown in FIG. A multi-focus surface, that is, a plurality of rotary paraboloids (a plurality of reflection regions m3, m3...) Having the same focal point F position and different focal lengths, and the additional reflection surface 28c is formed in each reflection region m3. , M3... May be provided in at least one step portion among the step portions 24a1, 24a1,.

  FIG. 8 shows a modified example of the vehicular reverse lamp 10 (lamp unit 20A).

  Moreover, in the said embodiment, although each reflective surface 28a-28c illustrated about the structure provided (included) in the one reflector 24, not only this but each reflective surface 28a-28c, As shown in FIG. 8, they may be configured as separate members that are physically separated from each other.

  As described above, in the vehicular retreat lamp provided at the rear end portion of the vehicle, an additional reflection surface is added, the vehicle is reflected by the light from the light source that is reflected in this order by the additional reflection surface and the top surface reflection surface, and passes through the lens. By irradiating the front area on the road surface with respect to the rear end, it is possible to suppress the occurrence of dark (dark areas) in the front area on the road surface with respect to the rear end of the vehicle. Is not only the vehicle reversing lamp of the above-described embodiment and modification, but also any main light-reflecting reflecting surface and top surface reflecting surface (or a reflecting surface corresponding thereto). The present invention can be applied to various types of vehicular reverse lamps (for example, vehicular reverse lamps described in Japanese Patent No. 3973677).

  Each numerical value shown in the above embodiment and each modified example is an exemplification, and any appropriate numerical value different from this can be used.

  The above embodiment is merely an example in all respects. The present invention is not construed as being limited to these descriptions. The present invention can be implemented in various other forms without departing from the spirit or main features thereof.

  10 (10L, 10R) ... reverse lamp for vehicle, 20A, 20B, 20C ... lamp unit, 22 ... light source, 24 ... reflector, 24a ... reflector body, 24a1 ... stepped portion, 24b ... top surface, 24c ... reflector rib, 26 ... lens, 26a ... upper end, 26b ... lower end, 28a ... main light distribution reflecting surface, 28b ... top reflecting surface, 28c ... additional reflecting surface

Claims (6)

In the vehicle reverse lamp provided at the rear end of the vehicle,
A light source that emits light downward;
A main light distribution reflecting surface that is provided below the light source so that light from the light source enters, and reflects the light from the light source toward the rear of the vehicle;
A top surface reflecting surface provided on the rear side and above the reflecting surface for main light distribution so as not to block light from the light source incident on the reflecting surface for main light distribution; and
An additional reflection surface that reflects at least a portion of light from the light source that is not incident on the main light distribution reflection surface toward the top surface reflection surface;
A lens through which reflected light from the main light distribution reflecting surface and the top surface reflecting surface is transmitted;
The main light distribution reflecting surface is configured such that light from the light source that is reflected by the main light distribution reflecting surface and passes through the lens irradiates a far region on the road surface with respect to the rear end of the vehicle. ,
The said additional reflective surface is a reverse lamp for vehicles comprised so that the light from the said light source which is reflected in this order by the said additional reflective surface and the said top surface reflective surface, and permeate | transmits the said lens may irradiate the said near field.   The vehicular reverse lamp according to claim 1, wherein the light source is a semiconductor light emitting element arranged to irradiate light downward. A reflector including at least a reflector body and a top surface extending from an upper end edge of the reflector body toward the rear of the vehicle;
The main light distribution reflecting surface is provided on the reflector body,
The top surface reflecting surface is provided on the top surface,
3. The vehicular reverse lamp according to claim 1, wherein a through hole through which light from the light source incident on the main light distribution reflecting surface passes is formed in the top surface. 4.   The vehicular reverse lamp according to any one of claims 1 to 3, wherein the main light distribution reflecting surface is constituted by a plurality of reflecting regions.   5. The vehicular reverse lamp according to claim 1, wherein the additional reflection surface is provided near a lower end portion of the main light distribution reflection surface. 6. 5. The vehicular reverse lamp according to claim 4, wherein the additional reflection surface is provided in at least one step portion among the step portions between the plurality of reflection regions.