JP6943099B2 - Inner lens and vehicle lighting equipment - Google Patents

Description

The present invention relates to an inner lens and a vehicle lamp.

As a vehicle lamp, for example, a light guide plate, an inner lens, or the like is used to emit surface light (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2013-235729

In the above-mentioned vehicle lamps, there is a demand for a configuration in which light unevenness is small and surface emission is efficiently performed.

The present invention has been made in view of the above, and an object of the present invention is to provide an inner lens and a vehicle lamp capable of efficiently surface-emitting with less unevenness of light.

The inner lens according to the present invention has a planar incident surface arranged so as to face the light emitting surface of a light source having a light emitting surface, and a diffuser that radially reflects light incident from the incident surface along the incident surface. A part of the light reflected by the diffuse reflection surface, which is a parabolic surface having a reflecting surface and an axis parallel to the first direction and is arranged at one end of the first direction parallel to the incident surface, is described above. It has a luminous reflective surface that reflects toward the other side of the first direction, and is provided with an optical guide portion that guides light from the first light source and extends in a second direction different from the first direction. , A prism having an exit surface for emitting light on the outer surface side in the vehicle-mounted state, and a plurality of prism reflecting surfaces for reflecting light from the light guide portion side toward the exit surface on the inner surface side in the vehicle-mounted state. The unit includes a connection unit that connects the light guide unit and the prism unit and has a control reflecting surface that reflects the light guided by the light guide unit toward the prism unit.

Further, in the inner lens, the control reflection surface may have a plurality of regions arranged at different angles with respect to the virtual straight line parallel to the first direction.

Further, in the inner lens, the plurality of the regions reflect the light guided by the light guide unit toward the emission surface, and the reflected light is totally reflected on the inner surface of the emission surface. It may be arranged.

Further, in the inner lens, in the prism portion, the distance between the prism reflecting surface and the emitting surface in the light emitting direction may become smaller as the distance from the connecting portion in the second direction increases.

The vehicle lighting equipment according to the present invention includes a first light source unit having a first light source having a light emitting surface, a first inner lens that emits light from the first light source, a second light source, and the second light source. The first inner lens is the inner lens, and the second inner lens is the light from the second light source. And a rod-shaped portion that guides the light It also has a plate-shaped portion that transmits light emitted from the emission surface of the first inner lens and emits light in the emission direction.

Further, in the vehicle lamp, the first light source may be arranged on the axis of the parabolic reflection surface when viewed from a direction perpendicular to the incident surface of the first inner lens.

Further, in the above-mentioned vehicle lamp, the rod-shaped portion has a round bar shape extending in the third direction, and a plurality of light guide reflecting surfaces that reflect the light from the second light source toward the outer surface side in the vehicle-mounted state. On the inner surface side in the vehicle-mounted state, the rod-shaped portion gradually increases in the vertical dimension in the vehicle-mounted state at the connection portion with the plate-shaped portion as it approaches the plate-shaped portion. The connecting portion and the plate-shaped portion have semi-cylindrical surfaces having the same shape as the upper half and the lower half of the rod-shaped portion at the upper and lower portions, respectively, and have a surface for connecting the front end portions of the semi-cylindrical surface. You may.

According to the present invention, it is possible to provide an inner lens and a vehicle lamp capable of efficiently surface-emitting with less unevenness of light.

FIG. 1 is a diagram showing an example of a vehicle lamp according to the present embodiment. FIG. 2 is a diagram showing an example of a vehicle lamp according to the present embodiment. FIG. 3 is a diagram showing an example of the first light source and the first inner lens. FIG. 4 is a perspective view showing an example of a parabolic reflection surface. FIG. 5 is a diagram showing an example when the parabolic reflection surface is viewed from the side. FIG. 6 is a diagram showing an example when the prism portion is viewed from the rear. FIG. 7 is a diagram showing an example when the prism portion is viewed from the front. FIG. 8 is a graph schematically showing the intensity distribution of light reflected on a paraboloid. FIG. 9 is a diagram showing an example in which light is reflected toward the prism portion by the control reflecting surface in the inner lens according to Comparative Example 1. FIG. 10 is a diagram showing an example of a state in which the light guided to the connecting portion by the light guiding portion is reflected toward the prism portion by the control reflecting surface in the first inner lens according to the present embodiment. FIG. 11 is a diagram showing an example of a prism portion of the inner lens according to Comparative Example 2. FIG. 12 is a diagram showing an example of a prism portion of the first inner lens according to the present embodiment. FIG. 13 is a graph showing a comparison of light intensity distributions in the vertical direction between the prism portion according to Comparative Example 2 and the prism portion according to the present embodiment. FIG. 14 is a diagram showing an example of the second inner lens. FIG. 15 is a diagram showing shapes along the AA cross section, the BB cross section, the CC cross section, and the DD cross section in FIG. 14, respectively.

Hereinafter, embodiments of an inner lens and a vehicle lamp according to the present invention will be described with reference to the drawings. The present invention is not limited to this embodiment. In addition, the components in the following embodiments include those that can be easily replaced by those skilled in the art, or those that are substantially the same. In the following description, the front-rear (front, rear), up-down (upper, lower), and left-right (left, right) directions are the directions in which the vehicle headlights are attached to the vehicle. The direction when looking at the front while sitting in the driver's seat is shown. In this embodiment, it is assumed that the vertical direction is parallel to the vertical direction and the horizontal direction is the horizontal direction.

1 and 2 are views showing an example of a vehicle lamp 100 according to the present embodiment. FIG. 1 shows a configuration when viewed from the front, and FIG. 2 shows a configuration when viewed from above. As shown in FIGS. 1 and 2, the vehicle lamp 100 includes a first light source unit 10 and a second light source unit 20. The first light source unit 10 and the second light source unit 20 are supported by the inner panel 30. The inner panel 30 is housed in the housing 40. The vehicle lamp 100 according to the present embodiment can be used for, for example, a clearance lamp unit, a daytime running lamp unit, a turn signal lamp unit, and the like. The vehicle lighting fixture 100 according to the present embodiment may be arranged at any of the front portion, the rear portion, and the side portion of the vehicle. In the present embodiment, a case where the vehicle lamp 100 is arranged on the right side of the front part of the vehicle will be described as an example.

<First light source unit>
The first light source unit 10 has a first light source 11 and a first inner lens (inner lens) 12. The first light source 11 is a semiconductor type light source such as an LED, an OEL, or an OLED (organic EL). The first light source 11 has a light emitting surface 11a. The first light source 11 is fixed to, for example, a light source fixing portion of the inner panel 30.

The first inner lens 12 incidents the light from the first light source 11 and emits the incident light in a predetermined emission direction. In the present embodiment, the exit direction is, for example, forward, but is not limited to this, and may be another direction. FIG. 3 is a diagram showing an example of the first light source 11 and the first inner lens 12. FIG. 3 shows a cross-sectional shape of a plane that passes through the center of the light emitting surface 11a of the first light source 11 and is parallel to the horizontal plane. As shown in FIG. 3, the first inner lens 12 is formed in a plate shape, for example, and is bent in a U shape in a cross-sectional view, for example. That is, the first inner lens 12 has a first portion extending in the first direction D1, a second portion extending from the front end portion of the first portion to the second direction D2, and a rear portion from the left end portion of the second portion. Has a third portion extending to. The first direction D1 is a direction parallel to the incident surface 13 described later, and is a direction along the front-rear direction in the present embodiment. The first direction D1 and the front-rear direction do not have to completely coincide with each other. Further, in the present embodiment, the second direction D2 is a direction along the left-right direction. The second direction D2 and the left-right direction do not have to completely coincide with each other. The first inner lens 12 has a light guide portion 12F, a connection portion 12R, and a prism portion 12G.

The light guide portion 12F has an incident surface 13, a diffuse reflection surface 14, and a parabolic reflection surface 15. The incident surface 13 incidents light from the first light source 11. The incident surface 13 is arranged at a position protruding from the outer surface 12a of the light guide portion 12F. The incident surface 13 is arranged so as to face the light emitting surface 11a of the first light source 11. The incident surface 13 is, for example, flat, but is not limited thereto.

The diffuse reflection surface 14 diffuses the light from the incident surface 13 into the light guide portion 12F. The diffuse reflection surface 14 is arranged at a position facing the light emitting surface 11a. The diffuse reflection surface 14 has, for example, a conical shape with respect to the inner surface 12b of the light guide portion 12F.

The parabolic reflecting surface 15 is arranged at one end of the first direction D1 (in the present embodiment, the rear end). The parabolic reflecting surface 15 reflects the light reflected by the diffuse reflecting surface 14 and reaching the end portion in front of the first direction D1. FIG. 4 is a perspective view showing an example of the parabolic reflecting surface 15. As shown in FIG. 4, the parabolic reflection surface 15 has parabolic surfaces 15a and 15b and a concavo-convex surface 15d. The paraboloids 15a and 15b are arranged so as to sandwich the end side 15c. The paraboloid surface 15a is arranged on the outer surface 12a side, and the paraboloid surface 15b is arranged on the inner surface 12b side. The uneven surfaces 15d are arranged at both ends of the paraboloids 15a and 15b on the outer surface 12a side and the inner surface 12b side.

FIG. 5 is a diagram showing an example of a case where the parabolic reflection surface 15 is viewed from a direction (right side) perpendicular to the incident surface 13. As shown in FIG. 5, the axes AX of the paraboloids 15a and 15b are virtual straight lines parallel to the first direction D1 when viewed from the side. The first light source 11 is arranged on the axis AX of the paraboloids 15a and 15b when viewed from a direction perpendicular to the incident surface 13. In the present embodiment, the configuration in which the center F of the light emitting surface 11a of the first light source 11 is arranged on the axis AX when viewed from the direction perpendicular to the incident surface 13 is shown as an example, but the present invention is not limited to this.

Further, as shown in FIG. 3, the connecting portion 12R connects the light guiding portion 12F and the prism portion 12G. The connecting portion 12R has a control reflecting surface 16. The control reflecting surface 16 reflects the light from the light guiding portion 12F toward the emitting surface 18 (described later) of the prism portion 12G. The control reflecting surface 16 is arranged so that the reflected light is internally reflected on the emitting surface 18 and directed toward the prism reflecting surface 17.

The control reflection surface 16 has a first reflection surface 16a and a second reflection surface 16b as a plurality of regions arranged at different angles with respect to the virtual straight line H parallel to the first direction D1. The first reflecting surface 16a and the second reflecting surface 16b are planar, respectively. The first reflecting surface 16a is arranged at an angle θ1 with respect to the virtual straight line H parallel to the first direction D1. The second reflecting surface 16b is arranged at an angle θ2 with respect to the virtual straight line H. In this embodiment, θ1 <θ2. Therefore, the second reflecting surface 16b has a larger inclination angle with respect to the virtual straight line H than the first reflecting surface 16a. The first reflecting surface 16a and the second reflecting surface 16b reflect the light guided by the light guiding portion 12F with respect to the prism portion 12G at different reflection angles. The angle θ1 and the angle θ2 are set to angles at which the light reflected by the first reflecting surface 16a and the second reflecting surface 16b is internally reflected (totally reflected) on the exit surface 18. The control reflection surface 16 may be, for example, a free curved surface. When the control reflecting surface 16 has a free curved surface, the light guided by the light guiding portion 12F can be reflected by the prism portion 12G at different reflection angles by adjusting the shape of the controlling reflecting surface 16.

The prism portion 12G has a prism reflecting surface 17, an emitting surface 18, and a mounting piece 19. For example, the prism reflecting surfaces 17 are formed in a saw blade shape in a cross-sectional view, and a plurality of prism reflecting surfaces 17 are arranged in the left-right direction. The prism reflecting surface 17 reflects the light reflected by the control reflecting surface 16 (the first reflecting surface 16a and the second reflecting surface 16b) of the connecting portion 12R toward the emitting surface 18. FIG. 6 is a diagram showing an example when the prism portion 12G is viewed from the rear. As shown in FIG. 6, the prism reflecting surface 17 is formed in a state of extending in the vertical direction. The direction in which the prism reflecting surface 17 extends is not limited to the vertical direction, and may be configured to extend in another direction intersecting with the light from the control reflecting surface 16.

The exit surface 18 emits light reflected by the plurality of prism reflection surfaces 17. FIG. 7 is a diagram showing an example when the prism portion 12G is viewed from the front. As shown in FIG. 7, an uneven portion 18a extending in the left-right direction is formed on the exit surface 18. The uneven portion 18a makes it possible to diffuse the light emitted from the exit surface 18 in, for example, the vertical direction. Further, in FIG. 7, the plate-shaped portion 22B (described later) of the second light source unit 20 is shown by a alternate long and short dash line. The plate-shaped portion 22B is arranged in front of the exit surface 18. Therefore, the light emitted from the uneven portion 18a of the exit surface 18 is incident on the plate-shaped portion 22B in a diffused state. In the vehicle lighting fixture 100 according to the present embodiment, the outside of the region where the exit surface 18 and the plate-shaped portion 22B overlap is covered with, for example, the inner panel 30, when viewed from the front of the vehicle. The configuration is such that only the region where the exit surface 18 and the plate-shaped portion 22B overlap can be seen, but the present invention is not limited to this. For example, the inner panel 30 may be arranged because a part of the exit surface 18 is exposed from the plate-shaped portion 22B.

The mounting piece 19 is arranged at the left end of the prism portion 12G, and is mounted on the inner panel 30 via a fixing member (not shown) such as a screw. Therefore, the mounting piece 19 is arranged at a position away from the connecting portion 12R in the second direction D2. The size t2 of the end portion of the prism portion 12G on the mounting piece 19 side is smaller than the dimension t1 of the end portion on the connecting portion 12R side. The size of the prism portion 12G gradually decreases from the right side to the left side, that is, from the connection portion 12R side to the mounting piece 19 side, as the distance from the connection portion 12R in the second direction D2 increases.

Next, the light guide by the first inner lens 12 will be described. The light emitted from the light emitting surface 11a of the first light source 11 is incident on the first inner lens 12 from the incident surface 13. The incident light is diffused in the light guide portion 12F by the diffuse reflection surface 14, and a part of the incident light is directed to the parabolic reflection surface 15.

The light directed to the parabolic reflecting surface 15 is reflected toward the emitting surface 18 by the parabolic surfaces 15a and 15b, for example, as shown in FIG. The light reflected by the paraboloids 15a and 15b travels along the axis AX of the paraboloids 15a and 15b. In this way, the light guide unit 12F parallelizes the light from the first light source 11 and guides the light forward.

FIG. 8 is a graph schematically showing the intensity distribution of the light reflected by the paraboloids 15a and 15b. The vertical axis of FIG. 8 is the light intensity (relative value), and the horizontal axis indicates the position in the light guide unit 12F. The position of the light guide portion 12F shown on the horizontal axis corresponds to the line AA'in FIG. That is, the distribution of the light intensity from the upper end A to the lower end A'is shown in the cross section of the light guide portion 12F on the plane perpendicular to the axis AX. In this case, as shown in FIG. 8, the light intensity is substantially uniform from the upper end A to the lower end A'. Therefore, by providing the paraboloids 15a and 15b, the light incident from the first light source 11 is guided toward the connecting portion 12R in a state where the light intensity is uniform in the vertical direction.

As shown in FIG. 4, for example, the uneven surface 15d is provided in the range A1 from the upper end surface 12c of the light guide portion 12F to the position of the upper end portion of the incident surface 13. Further, the uneven surface 15d is provided in the range A2 from the lower end surface 12d of the light guide portion 12F to the position of the lower end portion of the incident surface 13. By providing the uneven surface 15d in the ranges A1 and A2, the light from the parabolic reflection surface 15 can be diffused more reliably. That is, in the present embodiment, since the diffuse reflection surface 14 has a shape recessed inside the light guide portion 12F, if the light from the emission reflection surface 15 is parallel light, a part of the light toward the exit surface 18 side. Is obstructed by the diffuse reflection surface 14, and it may not be possible to obtain uniform light. On the other hand, in the present embodiment, the uneven surface 15d is provided in the range A1 and A2 in which the light incident surface 13 is not provided in the vertical direction, that is, the range A1 and A2 in which the diffuse reflection surface 14 is not provided in the vertical direction. The uneven surface 15d is not provided in the range where the diffuse reflection surface 14 is provided in the vertical direction. Therefore, the light reflected by the uneven surface 15d is not obstructed by the diffuse reflection surface 14, and the intensity of the reflected light becomes uniform.

The light guided to the connecting portion 12R by the light guiding portion 12F is reflected by the control reflecting surface 16 toward the prism portion 12G.

FIG. 9 is a diagram showing an example in which light is reflected by the control reflecting surface 116 toward the prism portion 112G in the inner lens according to Comparative Example 1. On the other hand, FIG. 10 shows an example of a state in which the light guided to the connecting portion 12R by the light guiding portion 12F is reflected by the control reflecting surface 16 toward the prism portion 12G in the first inner lens 12 according to the present embodiment. It is a figure.

First, Comparative Example 1 will be described. The inner lens according to Comparative Example 1 has a light guide portion 112F, a connection portion 112R, and a prism portion 112G. The configuration of the light guide unit 112F is the same as that of the light guide unit 12F of the present embodiment. Further, the configuration of the prism portion 112G is the same as that of the prism portion 12G of the present embodiment. On the other hand, in the connecting portion 112R, the control reflecting surface 116 has a single planar shape and is arranged at an angle θ3 with respect to the virtual straight line H1 parallel to the first direction.

In such an inner lens according to Comparative Example 1, as shown in FIG. 9, the lights L11 and L12 guided by the connecting portion 112R are reflected by the control reflecting surface 116 and reach the prism portion 112G. The lights L11 and L12 that have reached the prism portion 112G are reflected by the prism reflecting surface 117 and are emitted from the emitting surface 118.

However, for example, the light L13 traveling on the outer surface 112a side of the light guide portion 112F of the control reflection surface 116 does not reach the prism portion 112G after being reflected by the control reflection surface 116, but from the inner surface of the connection portion 112R. It is emitted to the outside of the inner lens. Further, the lights L14 and L15 reflected at the position on the prism portion 112G side of the control reflecting surface 116 pass through the prism portion 112G and are emitted without reaching the prism reflecting surface 117. Therefore, the light guided from the light guide unit 112F is wasted.

On the other hand, in the first inner lens 12 according to the present embodiment, as shown in FIG. 10, among the lights guided by the connecting portion 12R, the light L1 traveling on the outer surface 12a side of the light guiding portion 12F is It is reflected by the first reflecting surface 16a and reaches the emitting surface 18. The light L1 is totally reflected on the inner surface of the exit surface 18 and travels toward the prism reflection surface 17. Then, the light L1 is reflected by the prism reflecting surface 17 and is emitted forward from the emitting surface 18.

Further, the lights L2 and L3 traveling on the inner surface 12b side of the light guide portion 12F are reflected by the second reflecting surface 16b and reach the exit surface 18. The lights L2 and L3 are totally reflected on the inner surface of the exit surface 18 and travel toward the prism reflection surface 17 as in the case of the light L1. Then, the lights L2 and L3 are reflected by the prism reflecting surface 17, and are emitted forward from the emitting surface 18.

Further, the light L4 incident on the boundary portion between the first reflecting surface 16a and the second reflecting surface 16b is reflected at the boundary portion and reaches the prism reflecting surface 17. The light L4 is reflected by the prism reflecting surface 17 and is emitted forward from the emitting surface 18. As described above, in the present embodiment, the control reflecting surface 16 arranged on the connecting portion 12R allows the light guided by the light guiding portion 12F to be emitted from the emitting surface 18 without waste.

Next, the light intensity in the prism portion 12G will be described. FIG. 11 is a diagram showing an example of the prism portion 112G of the inner lens according to Comparative Example 2. FIG. 12 is a diagram showing an example of the prism portion 12G of the first inner lens 12 according to the present embodiment. 11 and 12 show the state seen from the front, respectively.

First, Comparative Example 2 will be described. The inner lens according to Comparative Example 2 has the same configuration as the inner lens according to Comparative Example 1 shown in FIG. In Comparative Example 2, one or a plurality of light sources 111 (light sources 111a to 111c) are arranged on the outer surface side of the control reflection surface 116, and the light from the light source 111 is incident on the outer surface of the control reflection surface 116 to make the prism portion. It is configured to guide light to 112G.

As shown in FIG. 11, the light incident on the control reflecting surface 116 from the light source 111 is diffused in the vertical direction and the front-back direction, and travels in the prism portion 112G while being internally reflected. Of these, the light that has reached the prism reflecting surface 117 is reflected by the prism reflecting surface 117 and is emitted from the emitting surface 118.

On the other hand, in the first inner lens 12 according to the present embodiment, the light guided by the light guide unit 12F is guided and reflected so as to have a uniform light intensity in the vertical direction as shown in FIG. Reach surface 16. Therefore, the light reflected by the control reflecting surface 16 reaches the prism portion 12G while maintaining a uniform distribution of light intensity in the vertical direction.

FIG. 13 is a graph showing a comparison of light intensity distributions in the vertical direction between the prism portion 112G according to Comparative Example 2 and the prism portion 12G according to the present embodiment. The vertical axis of FIG. 13 is the light intensity (relative value), and the horizontal axis indicates the position in the prism portion 112G. The positions B, B', C, and C'shown on the horizontal axis indicate the positions B-B'shown in FIG. 11 and the positions C-C'shown in FIG. The positions BB'and the positions CC' are positions where the distances from the control reflection surface 116 or the control reflection surface 16 are equal.

In this case, in Comparative Example 2, when light is incident on the control reflection surface 116 only from the central light source 111a in the vertical direction, the light intensity of the central portion in the vertical direction is shown by the two-dot chain line curve in FIG. Is strong, and the light intensity becomes weaker from the central part to the upper side or the lower side.

Further, in Comparative Example 2, when light is incident on the control reflection surface 116 from three light sources 111a to 111c in the vertical direction, the positions corresponding to the respective light sources 111a to 111c are shown by the curve of the one-point chain line in FIG. The light intensity is high, and the light intensity becomes weaker as the distance from the position corresponding to each of the light sources 111a to 111c increases or decreases.

Therefore, in Comparative Example 2, the light reflected by the prism reflecting surface 117 and emitted from the emitting surface 118 has uneven light intensity in the vertical direction.

On the other hand, in the present embodiment, as shown by the solid line in FIG. 13, the light passing through the positions CC'of the prism portion 12G has a uniform light intensity in the vertical direction. Therefore, the light reflected by the control reflecting surface 16 travels in the prism portion 12G while maintaining a uniform distribution of light intensity in the vertical direction. Therefore, in the present embodiment, the light reflected by the prism reflecting surface 17 and emitted from the emitting surface 18 has a uniform light intensity distribution in the vertical direction. As described above, in the first light source unit 10, the light from the first light source 11 is guided by the first inner lens 12 with low loss, and is uniformly emitted from the exit surface 18 in the vertical direction.

<Second light source unit>
As shown in FIGS. 1 and 2, the second light source unit 20 has a second light source 21 and a second inner lens 22. Like the first light source 11, the second light source 21 is a semiconductor type light source such as an LED, an OEL, or an OLED (organic EL). The second light source 21 has a light emitting surface 21a. The second light source 21 is fixed to, for example, the light source fixing portion of the inner panel 30.

FIG. 14 is a diagram showing an example of the second inner lens 22. FIG. 14 shows a state in which the second inner lens 22 is viewed from the front. FIG. 15 is a diagram showing shapes along the AA cross section, the BB cross section, the CC cross section, and the DD cross section in FIG. 14, respectively.

As shown in FIG. 14, the second inner lens 22 is formed in a state of extending in the left-right direction. The second inner lens 22 has a light guide unit 23 that guides the light from the second light source 21, and a reflection unit 24 that reflects the light guided by the light guide unit 23 forward. The reflecting portion 24 has, for example, a saw blade-shaped cross section in a plane parallel to the horizontal direction, and has a shape extending in a strip shape in the vertical direction. A plurality of the reflecting portions 24 are arranged side by side in the stretching direction of the second inner lens 22.

The second inner lens 22 is a connecting portion that connects a rod-shaped portion 22A extending in the third direction D3, a plate-shaped portion 22B formed in a plate shape, and the rod-shaped portion 22A and the plate-shaped portion 22B. It has 22C and. In the second inner lens 22, the rod-shaped portion 22A, the plate-shaped portion 22B, and the connecting portion 22C are integrally molded.

The rod-shaped portion 22A extends from the second light source 21 side to the plate-shaped portion 22B side in the third direction D3 which curves from the rear to the front and from the right to the left. The rod-shaped portion 22A may be linear. As shown in FIG. 15, the rod-shaped portion 22A has, for example, a round bar shape having a circular shape with a diameter R in a cross-sectional view.

The plate-shaped portion 22B is connected to the rod-shaped portion 22A and is arranged in front of the light emitting surface 18 of the first inner lens 12 in the light emitting direction. That is, when viewed from the front, the plate-shaped portion 22B is arranged so as to overlap the exit surface 18 of the first inner lens 12. The plate-shaped portion 22B emits light guided by the rod-shaped portion 22A forward. Further, the plate-shaped portion 22B transmits the light emitted from the exit surface 18 of the first inner lens 12 and emits the light forward.

The plate-shaped portion 22B and the connecting portion 22C have a semi-cylindrical surface 23a having the same shape as the upper half of the rod-shaped portion 22A at the upper part, and a semi-cylindrical surface 23b having the same shape as the lower half of the rod-shaped portion 22A at the lower part. The plate-shaped portion 22B has a flat surface 23c that connects the front end portions of the upper and lower semi-cylindrical surfaces 23a and 23b. The plane 23c is a tangent plane between the upper semi-cylindrical surface 23a and the lower semi-cylindrical surface 23b. Therefore, the plate-shaped portion 22B and the connecting portion 22C maintain the configuration of the upper half and the lower half of the rod-shaped portion 22A, and the portion between them has a shape extending in the vertical direction. From the rod-shaped portion 22A to the plate-shaped portion 22B, the reflecting portion 24 is also gradually lengthened in the vertical direction. In this way, since the shape of the second inner lens 22 changes smoothly from the rod-shaped portion 22A to the plate-shaped portion 22B, the loss of light passing through the inside is suppressed. The surface connecting the semi-cylindrical surface 23a and the semi-cylindrical surface 23b is not limited to the flat surface 23c, and may be a curved surface or a concavo-convex portion may be formed on a part of the flat surface.

In the vehicle lamp 100 according to the present embodiment, the first light source unit 10 and the second light source unit 20 are combined and lit. When the first light source 11 is turned on in the first light source unit 10, the light from the first light source 11 is incident on the first inner lens 12. This light is guided by the light guide unit 12F so that the distribution of light intensity in the vertical direction becomes uniform, and is reflected toward the prism unit 12G in a state where the control reflection surface 16 maintains the distribution of light intensity without waste. In the prism portion 12G as well, the light is emitted from the exit surface 18 while maintaining the distribution of light intensity. The emitted light passes through the plate-shaped portion 22B of the second light source unit 20 and is irradiated forward.

Further, when the second light source 21 is turned on in the second light source unit 20, the light from the second light source 21 is incident from the end face of the rod-shaped portion 22A, and the inside of the rod-shaped portion 22A is directed toward the plate-shaped portion 22B. proceed. In this case, the light is internally reflected at each of the rod-shaped portion 22A, the connecting portion 22C, and the plate-shaped portion 22B, and the light that reaches the reflecting portion 24 is reflected forward. The reflected light is emitted from the front end portions of the rod-shaped portion 22A, the connecting portion 22C, and the plate-shaped portion 22B, and is irradiated forward.

Therefore, when viewed from the front, it looks like a band of light is emitted along the shape of the rod-shaped portion 22A of the second inner lens 22. Further, in the portion where the emission surface 18 of the first light source unit 10 and the plate-shaped portion 22B of the second light source unit 20 overlap, the light emitted from the emission surface 18 and the light emitted from the plate-shaped portion 22B are combined. Is irradiated forward. Therefore, it is possible to emit light in a state of being excellent in design and reducing unevenness of light in the vertical direction.

As described above, the first inner lens 12 according to the present embodiment has a planar incident surface 13 arranged to face the light emitting surface 11a of the light source 11 having the light emitting surface 11a, and light incident from the incident surface 13. A diffuse reflection surface 14 that radially reflects along the incident surface 13 and a radial surface 14 that is arranged at the rear end of the first direction D1 and has an axis AX parallel to the first direction D1. An optical guide unit having a luminous reflecting surface 15 that reflects a part of the reflected light toward the front of the first direction D1 and guiding the light from the first light source 11 to the front of the first direction D1. A plurality of 12Fs, which are provided so as to extend in the second direction D2 and have an exit surface 18 for emitting light on the outer surface side in the vehicle-mounted state, and reflect light from the light guide portion 12F side toward the exit surface 18. Control that connects the prism portion 12G having the prism reflecting surface 17 on the inner surface side in the vehicle-mounted state, the light guide portion 12F, and the prism portion 12G, and reflects the light guided by the light guide portion 12F toward the prism portion 12G. It includes a connecting portion 12R having a reflecting surface 16.

According to this configuration, the light incident on the incident surface 13 from the light source 11 and reflected by the diffuse reflection surface 14 and the radial reflection surface 15 and guided by the light guide unit 12F is transmitted to the prism unit 12G by the control reflection surface 16. Reflect toward. In this case, the light guided by the light guide unit 12F is guided so as to have a uniform light intensity in the vertical direction and reaches the control reflecting surface 16. Therefore, the light reflected by the control reflecting surface 16 reaches the prism portion 12G while maintaining a uniform distribution of light intensity in the vertical direction. This light travels in the prism portion 12G while maintaining a uniform distribution of light intensity in the vertical direction, is reflected by the prism reflecting surface 17, and is emitted from the emitting surface 18. Therefore, the light emitted from the exit surface 18 has a uniform light intensity distribution in the vertical direction. As a result, it is possible to efficiently perform surface emission with less unevenness of light.

Further, in the first inner lens 12 described above, the connecting portion 12R may have a plurality of control reflecting surfaces 16 arranged at different angles with respect to a virtual straight line parallel to the first direction. As a result, the light can reach the prism portion 12G without waste.

Further, in the first inner lens 12 described above, the plurality of control reflecting surfaces 16 reflect the light guided by the light guiding portion 12F toward the emitting surface 18, and the reflected light is reflected on the inner surface of the emitting surface 18. It may be arranged so as to be totally reflected. As a result, the light can be reliably reflected on the prism reflecting surface 17, so that the loss can be reduced.

Further, in the first inner lens 12 described above, in the prism portion 12G, the distance between the prism reflecting surface 17 and the emitting surface 18 in the light emitting direction becomes smaller as the distance from the connecting portion 12R to the second direction D2. May be good. As a result, the loss of light can be reduced on the downstream side in the traveling direction of light, so that the light intensity can be made uniform on the exit surface 18 both on the upstream side and the downstream side in the traveling direction of light.

Further, the vehicle lamp 100 according to the present embodiment includes a first light source unit 10 having a first light source 11 having a light emitting surface 11a, a first inner lens 12 for emitting light from the first light source 11, and a first light source unit 10. It includes a second light source unit 20 having two light sources 21 and a second inner lens 22 that emits light from the second light source 21. The first inner lens 12 is the above-mentioned first inner lens 12. The second inner lens 22 is connected to a rod-shaped portion 22A that guides the light from the second light source 21 and the rod-shaped portion 22A, and is arranged in front of the emission surface 18 of the first inner lens 12 in the light emission direction. It has a plate-shaped portion 22B that emits the light guided by the rod-shaped portion 22A in the emitting direction and transmits the light emitted from the emitting surface 18 of the first inner lens 12 and emits the light in the emitting direction.

According to this configuration, the light emitted from the emission surface 18 and the light emitted from the plate-shaped portion 22B are emitted from the portion where the emission surface 18 of the first light source unit 10 and the plate-shaped portion 22B of the second light source unit 20 overlap. The light is combined and irradiated forward. Therefore, it is possible to efficiently perform surface emission with less unevenness of light.

Further, in the vehicle lamp 100 described above, even if the first light source 11 is arranged on the axis AX of the parabolic surfaces 15a and 15b forming the parabolic reflecting surface 15 when viewed from a direction perpendicular to the incident surface 13. good. As a result, the light from the first light source 11 can reach the axis AX symmetrically with respect to the paraboloids 15a and 15b. As a result, the light intensity in the vertical direction can be made uniform.

Further, in the vehicle lamp 100 described above, the rod-shaped portion 22A has a curved and extending round bar shape, and has a plurality of reflecting portions 24 that reflect the light from the second light source 21 toward the outer surface side in the vehicle-mounted state. The rod-shaped portion 22A is provided on the inner surface side in the vehicle-mounted state, and the rod-shaped portion 22A is connected to the plate-shaped portion 22B by gradually increasing the vertical dimension in the vehicle-mounted state as it approaches the plate-shaped portion 22B. The portion 22C and the plate-shaped portion 22B have semi-cylindrical surfaces 23a and 23b having the same shape as the upper half and the lower half of the rod-shaped portion 22A at the upper and lower portions, respectively, and the front side of the upper and lower semi-cylindrical surfaces 23a and 23b. It has a plane 23c that connects the ends, and the semi-cylindrical surfaces 23a, 23b and the plane 23c may be connected. As a result, the change in the shape of the second inner lens 22 is suppressed from the rod-shaped portion 22A to the plate-shaped portion 22B, so that the loss of light passing through the inside is suppressed. Further, since the connecting portion 22C and the plate-shaped portion 22B have semi-cylindrical surfaces 23a and 23b at the upper and lower portions, the light passing through the inside of the second inner lens 22 is likely to be totally reflected on the semi-cylindrical surfaces 23a and 23b. It becomes a shape. As a result, it is possible to suppress the emission of light from the upper and lower portions of the connecting portion 22C and the plate-shaped portion 22B.

The technical scope of the present invention is not limited to the above-described embodiment, and modifications can be made as appropriate without departing from the spirit of the present invention. For example, in the second embodiment described above, the configuration in which the second light source 21 is arranged on the end surface of the rod-shaped portion 22A has been described as an example, but the present invention is not limited to this. For example, a plurality of light sources may be arranged on the end face of the plate-shaped portion 22B.

Further, the vehicle lamp 100 described in the above embodiment may be arranged in a state of being rotated by 90 ° in the axial direction of a straight line parallel to the front-rear direction.

θ1, θ2, θ3 ... Angle, A1, A2 ... Range, D1 ... 1st direction, D2 ... 2nd direction, D3 ... 3rd direction, F ... Center, H, H1 ... Virtual straight line, L1, L11, L2, L12 , L3, L13, L4, L14, L15 ... light, R ... diameter, 10 ... first light source unit, 11 ... first light source, 11a, 21a ... light emitting surface, 12 ... first inner lens, 12a, 112a ... outer surface, 12b ... Inner surface, 12c ... Upper end face, 12d ... Lower end face, 12F, 112F ... Light guide, 12G, 112G ... Prism, 12R, 112R ... Connection, 13 ... Incident surface, 14 ... Diffuse reflection surface, 15 ... Radial reflection surface, 15a, 15b ... Radical surface, 15c ... Edge, 15d ... Concavo-convex surface, 16,116 ... Control reflection surface, 16a ... First reflection surface, 16b ... Second reflection surface, 17,117 ... Prism Reflective surface, 18, 118 ... Exit surface, 18a ... Concavo-convex part, 19 ... Mounting piece, 20 ... Second light source unit, 21 ... Second light source, 22 ... Second inner lens, 22A ... Rod-shaped part, 22B ... Plate-shaped part , 22C ... Connection part, 23 ... Light guide part, 23a, 23b ... Semi-cylindrical surface, 23c ... Flat surface, 24 ... Reflection part, 30 ... Inner panel, 40 ... Housing, 100 ... Vehicle lighting equipment, 111, 111a to 111c ... light source.

Claims (7)

A planar incident surface of a light source having a light emitting surface, which is arranged so as to face the light emitting surface, a diffuse reflection surface that radially reflects light incident from the incident surface along the incident surface, and the incident surface. A part of the light that is arranged at one end of the parallel first direction and has an axis parallel to the first direction and is reflected by the diffuse reflection surface toward the other in the first direction. An optical guide unit that has a reflecting parabolic surface and guides light from the first light source.
It is provided so as to extend in a second direction different from the first direction, has an exit surface for emitting light on the outer surface side in the vehicle-mounted state, and reflects light from the light guide portion side toward the exit surface. A prism portion having a plurality of prism reflecting surfaces on the inner surface side when mounted on a vehicle,
It is provided with a connecting portion that connects the light guiding portion and the prism portion and has a control reflecting surface that reflects the light guided by the light guiding portion toward the prism portion .
The parabolic reflecting surface is an inner lens having uneven surfaces on the upper side and the lower side than the range in which the incident surface is provided in the vertical direction when mounted on a vehicle. The inner lens according to claim 1, wherein the control reflecting surface has a plurality of regions arranged at different angles with respect to the virtual straight line parallel to the first direction. The second aspect of claim 2, wherein the plurality of regions are arranged so that the light guided by the light guide unit is reflected toward the emission surface and the reflected light is totally reflected on the inner surface of the emission surface. Inner lens. The prism portion is any one of claims 1 to 3, wherein the distance between the prism reflecting surface and the emitting surface in the light emitting direction becomes smaller as the distance from the connecting portion in the second direction increases. Inner lens described in the section. A first light source unit having a first light source having a light emitting surface and a first inner lens that emits light from the first light source.
A second light source unit having a second light source and a second inner lens that emits light from the second light source is provided.
The first inner lens is the inner lens according to any one of claims 1 to 4.
The second inner lens is
A rod-shaped portion that guides light from the second light source and
It is connected to the rod-shaped portion, is arranged in front of the emitting surface of the first inner lens in the light emitting direction, emits light guided by the rod-shaped portion in the emitting direction, and emits the first inner lens. A vehicle lamp having a plate-shaped portion that transmits light emitted from the exit surface of the lens and emits light in the exit direction. The vehicle lamp according to claim 5, wherein the first light source is arranged on the axis of the parabolic reflection surface when viewed from a direction perpendicular to the incident surface of the first inner lens. The rod-shaped portion has a round bar shape extending in the third direction, and has a plurality of light guide reflecting surfaces on the inner surface side in the vehicle-mounted state, which reflect light from the second light source toward the outer surface side in the vehicle-mounted state. death,
At the connection portion with the plate-shaped portion, the rod-shaped portion gradually increases as the vertical dimension in the vehicle-mounted state approaches the plate-shaped portion.
The connecting portion and the plate-shaped portion have semi-cylindrical surfaces having the same shape as the upper half and the lower half of the rod-shaped portion at the upper and lower portions, respectively, and have a surface connecting the front end portions of the semi-cylindrical surface. The vehicle lighting fixture according to claim 5 or 6.

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