JP6707848B2 - Inner lens and vehicle lighting - Google Patents

Description

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

BACKGROUND ART Conventionally, for example, a vehicular lamp having a daytime light function and a sideways light function is known. Such a vehicular lamp includes a light source and an inner lens that emits light from the light source. As a vehicular lamp, there has been proposed a configuration in which a fish-eye lens pattern is arranged on the light emission surface side of an inner lens to diffuse and emit light from a light source (for example, see Patent Document 1).

JP-A-1-120703

The vehicular lamp described in Patent Document 1 can cause an observer to recognize how the vehicle lighting shines. Further, when the lamp is not lit, an observer may recognize how the external light such as sunlight is reflected and glitters. Here, in the vehicular lamp, there is a demand for a configuration that allows the observer to more effectively recognize the glimmering state when the lamp is lit or not lit.

The present invention has been made in view of the above, and an inner lens that allows a viewer to more effectively recognize how a vehicular lamp shines during lighting or non-lighting, and for a vehicle including the inner lens The purpose is to provide a lamp.

An inner lens according to the present invention is an inner lens for a vehicle lighting device, wherein a plurality of lens bodies and a plurality of light emitting side end surfaces of the lens body are arranged side by side in at least one different direction on the end surfaces. A polyhedron prism is provided, and the polyhedron prism is configured by a polyhedron and has a plurality of light emission surfaces.

Further, in the polyhedral prism, a boundary portion with the end face has a polygonal shape, and the plurality of light emitting surfaces include a first light emitting surface including each side of the boundary portion and the first light emitting surface. And a second light exit surface different from that of the first light exit surface, and the first light exit surface forms a larger angle with the end surface than the second light exit surface.

Further, the boundary portion of the polyhedral prism has a triangular shape.

Further, in the polyhedral prism, the side of the boundary portion overlaps with the adjacent polyhedral prism.

Further, in the polyhedral prism, at least one of the second light emitting surfaces is oriented in a direction different from all the second light emitting surfaces of the adjacent polyhedral prisms.

Further, in the polyhedral prism, all the second light emitting surfaces are oriented in a different direction from all the second light emitting surfaces of the adjacent polyhedral prisms.

Further, the second light emitting surface has a larger area than the first light emitting surface.

Further, the lens body has a mounting portion for mounting the lens body to the outside at an end portion of an end surface on the light incident side, and the polyhedral prism is the above-mentioned when the lens body is viewed from the light emitting side. It is provided at a position overlapping the mounting portion.

A vehicular lamp according to the present invention includes a light source and the inner lens that diffuses light from the light source.

ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to make an observer recognize more effectively how the vehicular lamp shines at the time of lighting or non-lighting.

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 the vehicular lamp according to the present embodiment. FIG. 3 is an enlarged view showing a part of the prism portion according to the present embodiment. FIG. 4 is a plan view showing an example of a polyhedral prism. FIG. 5 is a diagram showing a configuration taken along the line AA in FIG. FIG. 6 is a diagram showing a configuration taken along the line BB in FIG. FIG. 7 is a diagram showing a configuration along the CC cross section in FIG. FIG. 8 is an enlarged view showing a part of the prism portion according to the modification. FIG. 9 is an enlarged view showing a part of the prism portion according to the modification. FIG. 10 is a diagram showing an inner lens according to a modification. FIG. 11 is an enlarged view showing a part of the inner lens according to the modified example.

Embodiments of an inner lens and a vehicle lamp according to the present invention will be described below with reference to the drawings. The present invention is not limited to this embodiment. In addition, constituent elements in the following embodiments include elements that can be easily replaced by those skilled in the art, or substantially the same elements.

FIG. 1 is a diagram showing an example of the vehicular lamp 100 according to the present embodiment when viewed from the front side. A vehicle lamp 100 shown in FIG. 1 is a vehicle lamp such as a daytime running lamp (daytime lamp) and a clearance lamp (car width lamp). The vehicular lamp 100 may have both a daytime lighting function and a sideways lighting function.

In the following description, the front-rear direction, the up-down direction, and the left-right direction indicate directions when the traveling direction of the vehicle is viewed from the driver's seat. Further, an arrow I indicates a direction toward the inside in the left-right direction of the vehicle, and an arrow O indicates a direction toward the outside in the left-right direction of the vehicle. The arrow U indicates the upward direction of the vehicle, and the arrow D indicates the downward direction of the vehicle. The vehicular lamp 100 is attached to each of a left side and a right side of a vehicle front part. Although FIG. 1 and the following description exemplify the vehicle lamp 100 mounted on the right side of the vehicle front part, the same description can be applied to the vehicle lamp mounted on the left side of the vehicle front part.

As shown in FIG. 1, the vehicular lamp 100 is housed in a lamp housing 10. The lamp housing 10 also accommodates other vehicle lamps (not shown) such as headlamps. The vehicle lamp 100 includes a light source 11, a light distribution control unit 12, and an inner lens 13. FIG. 2 is a diagram schematically showing the positional relationship between one light source 11, the light distribution control unit 12, and the inner lens 13. In FIG. 2, arrow F indicates the direction toward the front side of the vehicle. The arrow R indicates the direction toward the rear side of the vehicle.

As shown in FIGS. 1 and 2, the light source 11 emits light in a hemispherical radiation direction, for example, from a front surface. The light source 11 may emit light in a range narrower than the hemispherical radiation direction. As the light source 11, for example, a semiconductor-type light source such as an LED, an OEL, or an OLED (organic EL) can be used, but the light source 11 is not limited to this. In the present embodiment, a plurality of (for example, 5 or 6) light sources 11 are provided and arranged along the shape of the inner lens 13.

The light distribution control unit 12 performs light distribution control so that the light emitted from the light source 11 in the hemispherical radiation direction travels forward. As the light distribution control unit 12, for example, a reflector or the like can be used, but a cup-shaped lens or the like may be used. Further, instead of the light distribution control unit 12 or in addition to the light distribution control unit 12, a conductive member made of a transparent resin material such as acrylic resin, PC (polycarbonate), PMMA (polymethylmethacrylate, methacrylic resin) or the like. An optical member may be used.

The inner lens 13 is arranged in front of the light distribution control unit 12. The inner lens 13 diffuses and outputs the light whose light distribution is controlled. In the present embodiment, the inner lens 13 has a curved shape along the outer edge and the lower edge of the lamp housing 10, but the invention is not limited to this.

The inner lens 13 has an inner lens body 13c and a prism portion 14. The inner lens main body 13c and the prism 14 may be manufactured by one member, but may be manufactured separately and adhered by an adhesive or the like. In this embodiment, the inner lens body 13c and the prism 14 are integrally formed as one member. The prism body 13c has an end face (incident face) 13a on the light incident side on which light from the light source 11 is incident and an end face (emission face) 13b on the light emitting side on which light from the light source 11 is emitted. ing. In FIG. 2, the end surface 13b is a front surface of the inner lens 13 (a surface on the side far from the light source 11, a surface on the emission surface side of the vehicular lamp 100). A prism portion 14 is formed on the end surface 13b of the inner lens 13. The prism portion 14 is formed over substantially the entire end surface 13b of the inner lens 13. The prism unit 14 includes a plurality of polyhedral prisms 20.

FIG. 3 is an enlarged view showing a part of the end surface 13b of the inner lens 13. The direction on the front side of the paper surface of FIG. 3 is the front direction of the vehicle. As shown in FIG. 3, in the polyhedral prism 20, the shape of the boundary portion 21 with the end face 13b is formed in a polygonal shape. In the present embodiment, a configuration in which the boundary portion 21 has a triangular shape will be described as an example. The shape of the boundary portion 21 is not limited to the triangular shape, and may be a polygonal shape other than the triangular shape such as a quadrangle or a pentagon. In the present embodiment, the virtual plane including the boundary portion 21 is the end surface 13b in the portion where the polyhedral prism 20 is provided.

The polyhedral prism 20 has a plurality of (three in this embodiment) sides 22 depending on the shape of the boundary portion 21. The polyhedral prisms 20 are arranged side by side in the extension direction of each side 22 without any gap. That is, the polyhedral prisms 20 are arranged side by side without gaps in three different directions on the end face 13b. Further, the polyhedral prism 20 includes a polyhedral prism 20 in which a triangular vertex of a boundary portion 21 is arranged above and a polyhedral prism in which a triangular vertex of a boundary portion 21 is arranged below when viewed in the three directions. 20 and 20 are arranged adjacent to each other and alternately repeated. Further, the polyhedral prism 20 is arranged such that the side 22 of the adjacent polyhedral prism 20 overlaps. The polyhedral prism 20 is arranged over the entire prism portion 14 of the inner lens 13 with almost no space.

The polyhedral prism 20 has a plurality of planar light emitting surfaces 23. One light emitting surface 23 emits light in one direction, for example. The plurality of light emitting surfaces 23 are oriented in different directions. Therefore, the plurality of light emitting surfaces 23 emit light from the light source 11 in different directions. The shape of the light emitting surface 23 is not limited to a flat surface, and may be a surface having a curvature.

FIG. 4 is a diagram showing a configuration of two adjacent polyhedral prisms 20 out of the plurality of polyhedral prisms 20. FIG. 5 is a diagram showing a configuration taken along the line AA in FIG. FIG. 6 is a diagram showing a configuration taken along the line BB in FIG. FIG. 7 is a diagram showing a configuration along the CC cross section in FIG.

As shown in FIGS. 4 to 7, the plurality of light exit surfaces 23 are a first light exit surface 24 including each side 22 of the polyhedral prism 20 and a second light exit surface different from the first light exit surface 24. Including 25 and. In the present embodiment, the polyhedral prism 20 has a total of six light emitting surfaces 23 including three first light emitting surfaces 24 and three second light emitting surfaces 25. The area of each second light emitting surface 25 is larger than that of each first light emitting surface 24.

Moreover, these six light emitting surfaces 23 are oriented in mutually different directions. In FIG. 4, a polygonal prism 20 (polyhedral prism 20a) in which the apex of the triangle of the boundary portion 21 is arranged above (upper side of FIG. 3), and the apex of the triangle of the boundary portion 21 is on the direction D side (lower side in FIG. ) And the polyhedral prism 20 (polyhedral prism 20b).

The three first light emitting surfaces 24 included in the polyhedral prism 20a emit, for example, a surface 24a that emits light above the vehicle, a surface 24b that emits light inside the vehicle, and a light outside the vehicle. Surface 24c. Further, the three first light emitting surfaces 24 included in the polyhedral prism 20b are, for example, a surface 24d that emits light to the lower side of the vehicle, a surface 24e that emits light to the inner side of the vehicle, and a surface 24e that emits light to the outer side of the vehicle. The surface 24f which emits is included.

The three second light emitting surfaces 25 included in the polyhedral prism 20a emit light toward the lower side of the vehicle, a surface 25b that emits upward toward the inside of the vehicle, and a surface 25b that emits upward toward the outside of the vehicle. And an exit surface 25c. Further, the three second light emitting surfaces 25 included in the polyhedral prism 20b include a surface 25d that emits light toward the upper side of the vehicle, a surface 25e that emits light toward the lower inside of the vehicle, and a surface 25e that emits light toward the lower outside of the vehicle. The emitting surface 25f is included.

Of the above-mentioned surfaces, the surface 24a and the surface 25d both emit light toward the upper side of the vehicle, but since they are directed in mutually different directions, for example, the normal direction (front direction) of the end surface 13b is taken as the reference direction. The emission angles are different from each other. Further, the surface 24d and the surface 25a both emit light to the lower side of the vehicle, but since they are directed in different directions, the emission angles when the normal direction of the end surface 13b is the reference direction are different from each other. There is. Further, the surfaces 24b, 24e, 25b, and 25e all emit light to the inside of the vehicle, but since they are directed in different directions, for example, the emission angle when the normal direction of the end surface 13b is the reference direction is Different from each other. Further, the surfaces 24c, 24f, 25c, and 25f all emit light to the outside of the vehicle, but since they are directed in different directions, the emission angle when the normal direction of the end face 13b is the reference direction is, for example, Different from each other. In the polyhedral prism 20, even when the two adjacent polyhedral prisms 20a and 20b are viewed, the light emitting surface 23 is arranged so as to emit light in different directions.

As shown in FIG. 5, the first light emitting surface 24 makes an angle α with the end surface 13b. Further, as shown in FIG. 6, the second light emitting surface 25 forms an angle β with the end surface 13b. At this time, α>β can be satisfied. That is, the first light emitting surface 24 can be arranged so that the angle formed between the first light emitting surface 24 and the end surface 13b is larger than that of the second light emitting surface 25. In this case, the first light emitting surface 24 can emit light from the light source in the wide-angle direction more than the second light emitting surface 25. Further, the second light emitting surface 25 can emit the light from the light source at a narrower angle than the first light emitting surface 24. Thus, by setting α>β, the polyhedral prism 20 can emit the light from the light source in the front direction of the vehicle and in the narrow angle direction and the wide angle direction. Note that, as described above, all the second light emitting surfaces 25 provided on the two adjacent polyhedral prisms 20a and 20b are oriented in different directions. Therefore, when observed by the observer, it is possible to prevent the light from being linearly connected and viewed. It should be noted that at least one second light emitting surface 25 provided on one (for example, the polyhedral prism 20a) of the two adjacent polyhedral prisms 20a and 20b does not emit all the second light on the other side (for example, the polyhedral prism 20b). The structure may be oriented in a direction different from the plane.

The angle α of the polyhedral prism 20 is set so that light can be emitted at a wider angle than a fisheye lens. Therefore, the observer can recognize the light even when observing the vehicle lamp 100 from the wide-angle direction, and so-called light leakage is suppressed.

As shown in FIG. 5, in the adjacent polyhedral prisms 20, the first light emitting surfaces 24 including the common side 22 are arranged at an angle γ. Such angle γ can be set to, for example, 60°, but is not limited to this and may be set to another angle.

As shown in FIG. 7, the polyhedral prism 20 has a trapezoidal cross section by a plane perpendicular to the end face 13b. In this case, the size of the upper base portion (the surface 25b of the second light emitting surface 25 in FIG. 7) is larger than the size of the hypotenuse portion (the surfaces 24a and 24b of the first light emitting surface 24 in FIG. 7) of the trapezoid. Is getting bigger. The light from the light source is emitted in three directions from each of the surfaces 24a and 24b corresponding to the hypotenuse part of the trapezoid and the surface 25b corresponding to the upper bottom part. At this time, the amount of light emitted from the upper bottom portion is larger than the amount of light emitted from the hypotenuse portion. Therefore, it is possible to make the vehicle lighting device 100 recognize the manner in which the vehicle lighting device 100 shines brightly in the wide-angle direction while ensuring the brightness and the luminous intensity in the front direction.

The area of each second light emitting surface 25 is larger than that of each first light emitting surface 24. Therefore, the light emitted from the second light emitting surface 25 ensures the luminous intensity in the front direction of the vehicle while suppressing the light leakage.

When the light source 11 of the vehicular lamp 1 configured as described above is turned on, light is emitted from the light source 11. The light emitted from the light source 11 has its light distribution controlled by the light distribution control unit 12, and enters the end surface 13 a of the inner lens 13. The light incident on the end surface 13a passes through the inner lens 13 and is emitted from the prism portion 14 on the end surface 13b.

In the prism portion 14, light is emitted in different directions for each light emitting surface 23 having a predetermined area. More specifically, in the polyhedral prism 20a and the polyhedral prism 20b, light is emitted in the forward direction having different angles.

For example, light is emitted from the first light emitting surface 24 in a wide-angle direction with respect to the front direction of the vehicle. Further, from the second light emitting surface 25, which has a larger area than the first light emitting surface 24, the light is emitted at a narrower angle and a larger amount of light than the light emitted from the first light emitting surface 24. Is emitted.

As described above, in the inner lens 13 according to the present embodiment, light is emitted in different directions for each surface of the light emitting surface 23, so that the direction in which light is emitted and the direction in which light is not emitted are clearly distinguished. It Further, in a fisheye lens, light is emitted from a curved portion along a curved surface, whereas in the inner lens 13, light is emitted from a light emitting surface 23 having an area. Therefore, each surface of the light emitting surface 23 is In the direction in which the is directed, the amount of light is greater than that of the fisheye lens. Therefore, when the observer moves the line of sight along the surface of the inner lens 13 on the light emitting side, the light from one light emitting surface 23 is recognized at one position, and the light is emitted from the other light emitting surface 23 at another position. The light of can be recognized. Moreover, at each position where the light is recognized, the light stronger than the fisheye lens can be recognized. As a result, it becomes possible for the observer to more effectively recognize the manner in which all the surfaces of the light emitting surface 23 illuminate at a wide angle so as to glitter. Further, also in the case where external light such as sunlight is reflected and glitters when not lit, the viewer can be more effectively recognized.

Further, in the polyhedral prism 20, the first light emitting surface 24 and the second light emitting surface 25 can have different angles of emitting light. Thereby, for example, light is emitted from the first light emitting surface 24 including the side 22 at a wide angle, and thus light emission is possible over a wide range. Further, since the second light emitting surface 25 has a larger area than the first light emitting surface 24, the amount of light emitted from the second light emitting surface 25 is larger than that of the first light emitting surface 24. As a result, it is possible to secure the amount of light on the front side of the vehicular lamp 100 while emitting light over a wide range.

Further, since the boundary portion 21 of the polyhedral prism 20 has a triangular shape, a plurality of polyhedral prisms 20 can be efficiently arranged on the surface of the inner lens 13. Further, since the sides 22 of the adjacent polyhedral prisms 20 are provided so as to coincide with each other, the polyhedral prisms 20 can be arranged more efficiently.

The technical scope of the present invention is not limited to the above-described embodiment, and appropriate modifications can be made without departing from the spirit of the present invention. For example, in the above embodiment, the case where the boundary portion 21 of the polyhedral prism 20 is formed in a triangular shape has been described as an example, but the invention is not limited to this.

FIG. 8 is a diagram showing an example of the prism portion 14A according to the modification. As shown in FIG. 8, the prism portion 14A has a pattern of a plurality of polyhedral prisms 30. The polyhedral prism 30 has a quadrangular boundary portion 31 and four sides 32. The polyhedral prism 30 has a plurality of planar light emitting surfaces 33 directed in different directions. The plurality of light emitting surfaces 33 emit light from the light source in different directions. The plurality of light emitting surfaces 33 include a first light emitting surface 34 including each side 32 of the polyhedral prism 30 and a second light emitting surface 35 different from the first light emitting surface 34. Note that, in FIG. 8, regarding the correspondence relationship between the light emitting surface 33 and the first light emitting surface 34 and the second light emitting surface 35, one of the reference numerals 34 and 35 is shown for the sake of easy identification of the drawing. Only showing. In the present embodiment, the polyhedral prism 30 has a total of six light emitting surfaces 33 including four first light emitting surfaces 34 and two second light emitting surfaces 35. The pattern of the polyhedral prism 30 is configured such that the arrangement of the first light emitting surface 34 and the second light emitting surface 35 are alternately different in the vertical direction of FIG. 8, but the present invention is not limited to this. The arrangement of the first light emitting surface 34 and the second light emitting surface 35 may be different from each other in the left-right direction of FIG. 8, or may be the same arrangement.

FIG. 9 is a diagram showing an example of the prism portion 14B according to the modification. As shown in FIG. 9, the prism portion 14B has a pattern of a plurality of polyhedral prisms 40. The polyhedral prism 40 has a hexagonal boundary portion 41, and has six sides 42. The polyhedral prism 40 is in a state in which three corners of the polyhedral prism 20 described in the above embodiment are cut away. Therefore, the prism portion 14B has a plurality of voids 15B in addition to the prism portion 14 described in the above embodiment.

The polyhedral prism 40 has a plurality of planar light emitting surfaces 43 directed in mutually different directions. The plurality of light emitting surfaces 43 emit light from the light source in different directions. The plurality of light emitting surfaces 43 include a first light emitting surface 44 including the three sides 42 of the polyhedral prism 40, and a second light emitting surface 45 different from the first light emitting surface 44. In the present embodiment, the polyhedral prism 40 has a total of six light emitting surfaces 43, including three first light emitting surfaces 44 and three second light emitting surfaces 45. Note that in FIG. 9, regarding the correspondence relationship between the light emitting surface 43 and the first light emitting surface 44 and the second light emitting surface 45, one of reference numerals 44 and 45 is shown in order to make it easy to distinguish the drawing. Only showing.

In the prism portion 14B, the first light emitting surfaces 44 are arranged in a straight line along the extension direction of the side 42 overlapping between the adjacent polyhedral prisms 40. Since the prism portion 14B has the void portion 15B, the first light emitting surfaces 44 are arranged apart from each other in the direction aligned on a straight line. In this way, in the prism portion 14B, the first light emitting surfaces 44 are arranged at positions separated from each other in the direction in which the polyhedral prisms 40 are arranged. Therefore, for example, when light is emitted from each of the first light emitting surfaces 44 that are arranged side by side on a straight line, the light is emitted from the regions (first light emitting surface 44) that are separated from each other. Thereby, when an observer observes, it can suppress that light is connected and seen linearly.

Further, in the above-described embodiment, a case has been described as an example in which all the light emitting surfaces 23 are arranged inclined with respect to the end surface 13b including the boundary portion 21 of the polyhedral prism 20, but the present invention is not limited to this. Instead, for example, a light emitting surface 23 parallel to the end surface 13b may be provided. Thereby, the brightness in the front direction of the vehicle can be secured.

Further, in the above embodiment, at least one of the corners of the polyhedral prism 20 may have a rounded shape. For example, the boundary portion 21 of the polyhedral prism 20 may have a triangular shape with rounded corners. In this case, since the voids are formed at the corners of the adjacent polyhedral prisms 20, the first light emitting surfaces 24 arranged side by side on a straight line are arranged apart from each other.

Further, in the above embodiment, an example is shown in which the dimensions of each side and the configuration of the angle α are the same in the three first light emitting surfaces 24 included in one polyhedral prism 20, but the present invention is not limited to this. Not something to do. For example, at least one first light emitting surface 24 may have a configuration such as a dimension of each side and an angle α that is different from other first light emitting surfaces 24.

Similarly, in the above-described embodiment, an example in which the dimensions of each side and the configuration of the angle β are the same in the three second light emitting surfaces 25 included in one polyhedral prism 20 is shown. It is not limited. For example, at least one second light emitting surface 25 may have a configuration such as a dimension of each side and an angle β that is different from other second light emitting surfaces 25. For example, the angle β is different between the surface 25a of the second light emitting surface 25 that emits light toward the lower side of the vehicle and the surfaces 25b and 25c that emit light toward the inside and the outside of the vehicle. May be

Further, in the above-described embodiment, as the vehicle lighting device 100, for example, a daytime running lamp, a clearance lamp, or a vehicle lighting device having both a daytime lighting function and a side lighting function has been described, but the present invention is not limited to this. However, it may be applied to a vehicular lamp having other functions such as a signal lamp and a rear combination lamp.

Further, in the above-described embodiment, the adjacent polyhedral prisms 20 have been described by exemplifying a configuration in which the sides 22 are overlapped, but the present invention is not limited to this, and the sides 22 are separated from each other. It may be configured to be arranged in.

Further, in the above description, the polyhedral prism is described by taking the configuration in which the bottom portion is formed in a triangle or a quadrangle as an example, but the present invention is not limited to this, and the configuration is formed in a pentagonal or more polygonal shape. Good. The inner lens may have a configuration in which polyhedron prisms having a plurality of bottom shapes are combined and arranged. The second light emitting surface 25 may also have another shape such as a triangle, a quadrangle having a shape different from that of the above-described embodiment, or a pentagonal or more polygonal shape.

FIG. 10 is a perspective view showing the inner lens 113 according to the modified example. The inner lens 113 shown in FIG. 10 has a mounting portion 116 on the outer peripheral portion (end portion) of the end surface 113a on the light incident side of the lens body 113c. The attachment portion 116 is provided to attach the lens body 113c to the lamp housing 10 or another member, for example. Further, a polyhedral prism 14 is formed along the edge portion 113d on the end surface 113b of the lens body 113c on the light emitting side.

FIG. 11 is a diagram showing an example when the lens body 113b of the inner lens 113 is viewed from the end surface 113b side on the light emitting side. As shown in FIG. 11, on the end surface 113b, a prism portion 14 including a plurality of polyhedral prisms 20 is formed along the edge portion 113d. The prism portion 14 is provided at a position overlapping the mounting portion 116 when the lens body 113b is viewed from the end surface 113b side on the light emitting side.

In the inner lens 113, the prism portion 14 (plurality of polyhedral prisms 20) provided on the edge portion 113d of the lens body 113d allows the observer to recognize the glimmering state during lighting or non-lighting. Therefore, since the mounting portion 116 provided on the light incident side end surface 113a is covered with the glittering portion of the prism portion 14, it can be suppressed from being recognized from the light emitting side end surface 113b side. Further, the inner lens 113 can diffuse the reflected light by the prism portion 14 when the light from the light source 11 is reflected by the mounting portion 116, for example. Therefore, it is possible to prevent the reflected light reflected by the mounting portion 116 from being recognized from the side of the end surface 113b, and it is possible for the observer to recognize the glimmering state of the prism portion 14 as a whole.

α, β, γ angle 10 lamp housing 11 light source 12 light distribution control unit 13 inner lenses 13a, 13b end face 13c lens bodies 14, 14A, 14B prism unit 15B voids 20, 30, 40 polyhedral prisms 21, 31, 41 boundary portions 22, 32, 42 Sides 23, 33, 43 Light emitting surface 24, 34, 44 First light emitting surface 25, 35, 45 Second light emitting surface 100 Vehicle lamp

Claims (9)

An inner lens for a vehicle lamp,
Lens body,
A plurality of polyhedral prisms arranged on the end surface of the lens body on the light emission side so as to be respectively arranged in a plurality in different at least one direction on the end surface;
The polyhedron prism is constituted by a polyhedron, it has a plurality of light emitting surface,
The polyhedral prism has a polygonal shape in a boundary portion with the end face,
Each of the plurality of light emission surfaces has a first light emission surface including each side of the boundary portion and a second light emission surface having a different angle between the first light emission surface and the end surface. ,
The second light exit surface, an inner lens for contact with the boundary portion. Before Symbol first light exit surface, the second as compared with the light emitting surface, the inner lens of claim 1 large angle forming between the end face. The inner lens according to claim 1 or 2, wherein the boundary portion of the polyhedral prism has a triangular shape. The inner lens according to claim 3, wherein in the polyhedral prism, sides of the boundary portion overlap with adjacent polyhedral prisms. The polyhedron prism, the second light emitting surface at least one, but all of any one of claims 1 to 4 is directed to the second light emitting surface different from the direction of the polyhedral prisms adjacent Inner lens described in. The polyhedron prism, all of the second light emitting surface, claim 1 is directed to a direction different from all of the second light emitting surface of the polyhedron prism adjacent to one of claims 4 Inner lens described. The second light exit surface, the inner lens according to any one of claims 1 to 6 area is larger than the first light emitting surface. The lens body has a mounting portion for mounting the lens body to the outside, at the end of the end surface on the light incident side,
The inner lens according to any one of claims 1 to 7, wherein the polyhedral prism is provided at a position overlapping the mounting portion when the lens body is viewed from the light emitting side. A light source,
A vehicle lamp including the inner lens according to claim 1, which diffuses light from the light source.

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