Vehicle lighting

Abstract

To provide a vehicular lighting tool for enabling light emission in good appearance while shortening its longitudinal size.SOLUTION: A first light guide lens 3 includes a light guide part 7 extending in one direction, a reflection part 9 located on one end side of the light guide part 7 for reflecting light L located on the back side of the light guide part 7 and adapted to be guided toward the other end side of the light guide part 7, to the front face side of the light guide part 7, and an emission part 10 located on the front face side of the light guide part 7 for emitting the light L reflected by the reflection part 9, to the outside of the light guide part 7. A second light guide lens 4 includes a second incidence part 11 for making the light L emitted from the emission part 10 incident from the back side to the inside, a first light emission part 12 for emitting part L1 of the light L made incident from the second incidence part 11, from the front face side to the outside, to perform light emission, and a second light emission part 13 for emitting part L2 of the light L made incident from the second incidence part 11, from a position different from the first light emission part 12 to the outside, to perform light emission.SELECTED DRAWING: Figure 3

Description

【Technical Field】 【0001】 The present invention relates to vehicle lamps. 【Background Art】 【0002】 Conventionally, as vehicle lamps mounted on vehicles, those combining a light source such as a light-emitting diode (LED) and a light guide such as a light guide lens are known. 【0003】 For example, in Patent Document 1 below, as the configuration of the light guide, even when it is formed so that the length in the front-rear direction in the horizontal plane changes and the light emission region on the front surface is set shorter than the light incident region on the rear surface in the vertical plane, a vehicle lamp capable of realizing uniform light emission is disclosed. 【Prior Art Documents】 【Patent Documents】 【0004】 【Patent Document 1】 Japanese Unexamined Patent Application Publication No. 2015-49977 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0005】 However, in the invention described in Patent Document 1 above, since the front-rear length of the light guide is long, for example, depending on the slant shape or the shape with a tight wrap-around given to the corner portion on the front end or rear end side of the vehicle, it becomes difficult to arrange it inside the lamp body. Further, in the invention described in Patent Document 1, since only the light emission region on the front surface emits light in a line shape, the variations in appearance are poor. 【0006】 The present invention has been proposed in view of such conventional circumstances, and an object thereof is to provide a vehicle lamp capable of performing another good-looking light emission together with line-shaped light emission while shortening the dimensions in the front-rear direction. 【Means for Solving the Problems】 【0007】 To achieve the above objective, the present invention provides the following means. [1] Light source and The system comprises a first light guide lens and a second light guide lens for guiding the light emitted from the light source, The first light guide lens comprises a light guide portion extending in one direction, A first incident portion is located at one end of the light guide portion and causes light emitted from the light source to enter the interior of the light guide portion, A reflecting portion located on the back side of the light guide portion, which reflects the light guided toward the other end of the light guide portion toward the front side of the light guide portion, It has an output section located on the front side of the light guide section, which emits the light reflected by the reflecting section to the outside of the light guide section, The second light guide lens has a shape that extends in the first direction, A second inlet that directs the light emitted from the aforementioned emission part into the interior from the back side, A first light-emitting unit that emits light by emitting a portion of the light incident from the second incident unit outwards from the front side, A portion of the light incident from the second incident part is directed in a direction perpendicular to the first direction. Towards It has a second light-emitting part that emits light by emitting it to the outside. death, before The second incident portion is located in the central part of the back side of the second light guide lens, and At least one second focusing incident surface is arranged in a stepped manner from both sides of the first focusing incident surface toward the emission section, The first focusing incident surface and the second focusing incident surface include at least one diffusing incident surface located between adjacent surfaces, The light incident from the first and second focusing incident surfaces is focused toward the first light-emitting section. This invention is characterized by diffusing a portion of the light incident from the aforementioned diffusion incident surface toward the second light-emitting portion. Car Dual-purpose light fixture. [2 The first light-gathering incident surface is composed of a convex curved surface that is curved in an arc shape in a cross-section along the other direction. The second light-gathering incident surface is composed of a curved surface obtained by dividing the central part of a convex curved surface that is curved in an arc shape in a cross section along the other direction, with a groove in between. The diffusion incident surface is characterized by being composed of surfaces that connect adjacent first and second light-gathering incident surfaces of the groove portion. 1 Vehicle lighting equipment as described in [ ]. [ 3 The first light-emitting part and the emission part have a shape that extends in the direction described above. The vehicle lamp according to [1], further characterized in that the dimension of the first light-emitting portion in the other direction is smaller than the dimension of the emission portion in the other direction. [ 4 ] The first light-emitting portion is located on the front side of the second light guide lens and has a line-shaped first light-emitting surface extending in the direction described above. The second light-emitting part is located on the upper surface side of the second light guide lens. Having a second light-emitting surface The vehicle lighting device described in [1] above, characterized in that it is a vehicle lighting device. [5] The vehicle lamp according to [4], characterized in that the second light-emitting part has a plurality of second light-emitting surfaces arranged in the one direction. [6] A light-shielding member is provided that covers at least the front and top sides of the second light guide lens, The light-shielding member is the first light-emitting surface A first opening that exposes to the outside, and the second light-emitting surface The above is characterized by having a second opening that exposes to the outside. 4 Vehicle lighting equipment as described in [ ]. [Effects of the Invention] 【0008】 As described above, the present invention makes it possible to provide a vehicle light fixture that shortens the dimensions in the front-to-back direction while providing a linear light emission along with another visually appealing light emission. [Brief explanation of the drawing] 【0009】 [Figure 1]It is a perspective view showing the configuration of a vehicle lamp according to an embodiment of the present invention. [Figure 2] It is a front view showing the configuration of the vehicle lamp shown in FIG. 1. [Figure 3] It is a sectional view of the vehicle lamp taken along the line segment A-A shown in FIG. 2. 【Mode for Carrying Out the Invention】 【0010】 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings used in the following description, for the sake of easy viewing of each component, the scale of the dimensions may be made different depending on the component, and the dimensional ratios of each component are not necessarily the same as the actual ones. 【0011】 As an embodiment of the present invention, for example, the vehicle lamp 1 shown in FIGS. 1 to 3 will be described. Note that FIG. 1 is a perspective view showing the configuration of the vehicle lamp 1. FIG. 2 is a front view showing the configuration of the vehicle lamp 1. FIG. 3 is a sectional view of the vehicle lamp 1 taken along the line segment A-A shown in FIG. 2. 【0012】 Also, in the drawings shown below, an XYZ orthogonal coordinate system is set, and the X-axis direction is the front-rear direction (length direction) of the vehicle lamp 1, the Y-axis direction is the left-right direction (width direction) of the vehicle lamp 1, and the Z-axis direction is the up-down direction (height direction) of the vehicle lamp 1, and each is shown as such. 【0013】 The vehicle lamp 1 of the present embodiment includes a light source 2, a first light guide lens 3 and a second light guide lens 4 arranged side by side in the front-rear direction, and a light shielding member 5 that covers the second light guide lens 4. 【0014】 The light source 2 is composed of, for example, an LED, and is mounted on the surface of a circuit board 6 provided with a drive circuit for driving this LED, and emits light L radially toward the first light guide lens 3. 【0015】 The first light guide lens 3 is made of a light-transmitting material such as a transparent resin like polycarbonate or acrylic, or glass. The first light guide lens 3 has a rod-shaped light guide portion 7 extending in one direction (left-right in this embodiment), a first incident portion 8 located at one end (base end) of the light guide portion 7, a reflecting portion 9 located on the back side of the light guide portion 7, and an output portion 10 located on the front side of the light guide portion 7. 【0016】 The first incident section 8 is located on one end side of the light guide section 7 and has a flat incident surface 8a facing the light source 2. The first incident section 8 directs the light L emitted from the light source 2 into the light guide section 7 (first light guide lens 3) from the incident surface 8a. The light L that enters the light guide section 7 from the first incident section 8 is then guided toward the other end (tip side) of the light guide section 7. 【0017】 Furthermore, the first incident section 8 is not limited to the configuration having the flat (planar) incident surface 8a described above, but may also have a lens shape that parallelizes or focuses the light L emitted radially from the light source 2 as it enters the interior of the light guide section 7. 【0018】 The reflective section 9 is located in the center of the back side of the light guide section 7 and has a plurality of reflective cuts 9a arranged in the direction in which the light guide section 7 extends (one direction). The plurality of reflective cuts 9a only need to reflect light L incident on the back side of the light guide section 7 at an angle that causes it to exit (transmit) from the front side of the light guide section 7 to the outside, and there are no particular limitations on their shape, size, number, etc. 【0019】 In this embodiment, the multiple reflection cuts 9a are configured such that, for example, grooves with a substantially triangular cross-section, which are cut out in a direction other than the one direction (up and down in this embodiment) in a direction perpendicular to the one direction (left and right in this embodiment), are arranged in one direction (left and right in this embodiment). 【0020】 Furthermore, the multiple reflection cuts 9a are designed to uniformize the light L emitted from the emission section 10 (described later) in the direction in which the light guide section 7 extends (one direction). To achieve this, the depth of the grooves forming the reflection cuts 9a gradually increases from one end of the light guide section 7 to the other end. Alternatively, the spacing between adjacent reflection cuts 9a gradually narrows from one end of the light guide section 7 to the other end. 【0021】 Furthermore, the reflective section 9 has a pair of reflective surfaces 9b on both sides of the central part (multiple reflective cuts 9a) on the back side of the light guide section 7, in the other direction (up and down direction). The pair of reflective surfaces 9b are composed of concave curved surfaces that are curved in an arc shape in the cross section of the light guide section 7 along the other direction (up and down direction) (hereinafter referred to as the "vertical cross section"). 【0022】 In the reflective section 9, the light L incident on these multiple reflection cuts 9a and the pair of reflective surfaces 9b is reflected toward the emission section 10 located on the front side of the light guide section 7. 【0023】 The emission section 10 is located on the front side of the light guide section 7 and has an emission surface 10a that extends in one direction (left-right direction). The emission surface 10a is composed of a convex curved surface that curves in an arc shape in the vertical cross-section of the light guide section 7. 【0024】 In the emission section 10, the light L reflected by the reflection section 9 is emitted from the emission surface 10a toward the second light guide lens 4 located outside (in front of) the light guide section 7 (first light guide lens 3). In addition, the emission section 10 emits the light L incident on the emission surface 10a toward the second light guide lens 4 in front of it so that it is parallel to the central axis AX connecting the centers of the first light guide lens 3 and the second light guide lens 4. 【0025】 The second light guide lens 4 is made of a light-transmitting material such as a transparent resin like polycarbonate or acrylic, or glass, and extends in one direction while covering the front, top, and bottom sides of the light guide portion 7 (first light guide lens 3). 【0026】 In other words, the second light guide lens 4 has a first lens portion 41 located on the front side of the light guide portion 7 (first light guide lens 3), and a pair of second lens portions 42 extending backward from both sides in the other direction (up and down direction) on either side of the central part of the back side of the first lens portion 41. 【0027】 The first lens portion 41 has an upper surface 4a and a lower surface 4b that are inclined forward in opposite directions with respect to the central axis AX, and a pair of inclined surfaces 4c and 4d that are inclined in opposite directions with respect to the front ends of the upper surface 4a and the lower surface 4b, with the first light-emitting surface 12a (described later) in between. 【0028】 The pair of second lens portions 42 are continuous with the upper surface 4a and lower surface 4b of the first lens portion 41, and have a flat plate shape that is inclined in opposite directions with respect to the central axis AX. Note that the pair of second lens portions 42 do not contribute to the illumination of the vehicle lamp 1, and are therefore not necessarily required components; they can be omitted in some cases. 【0029】 Furthermore, a recess 43 is provided on the back side of the second light guide lens 4, which is composed of the first lens portion 41 and a pair of second lens portions 42. The first light guide lens 3 is positioned inside this recess 43. 【0030】 The second light guide lens 4 has a second incident portion 11 located on the back side of the first lens portion 41, a first light-emitting portion 12 located on the front side of the first lens portion 41, and a second light-emitting portion 13 located on the upper surface 4a side of the first lens portion 41. 【0031】 The second incident section 11 has a shape (a so-called Fresnel lens shape) that includes a first condensing incident surface 11a located in the center of the back side of the first lens section 41, at least one (two each in this embodiment) second condensing incident surfaces 11b arranged in a stepped manner toward the exit section 10 from both sides (up and down directions) of the first condensing incident surface 11a, and at least one (two each in this embodiment) diffusing incident surfaces 11c located between adjacent first condensing incident surfaces 11a and second condensing incident surfaces 11b. 【0032】 The first light-gathering incident surface 11a is formed by a convex curved surface that curves in an arc shape in the vertical cross-section of the first lens portion 41 (second light guide lens 4). 【0033】 The second light-gathering incident surface 11b is composed of a curved surface obtained by dividing the central part of a convex curved surface that is curved in an arc shape into upper and lower halves with a groove 11d in between. 【0034】 The diffusion incidence surface 11c is composed of an upper surface and a lower surface that connect adjacent first focusing incidence surface 11a and second focusing incidence surface 11b of the groove portion 11d, which are inclined forward in opposite directions with respect to the central axis AX. 【0035】 In this embodiment, two second light-gathering incident surfaces 11b are arranged in a stepped manner on both sides of the first light-gathering incident surface 11a in the other direction (up and down direction). In addition, a first-stage diffusion incident surface 11c is provided that connects the first light-gathering incident surface 11a and the first-stage second light-gathering incident surface 11b, and a second-stage diffusion incident surface 11c is provided that connects the first-stage second light-gathering incident surface 11b and the second-stage second light-gathering incident surface 11b. The number of second light-gathering incident surfaces 11b and diffusion incident surfaces 11c arranged in a stepped manner is not particularly limited and can be changed as appropriate. 【0036】 In the second inlet section 11, of the light L emitted from the outlet section 10 toward the second light guide lens 4, the light L1 incident from the first condensing inlet surface 11a and the second condensing inlet surface 11b is focused toward the first light-emitting section 12. On the other hand, the light L2 incident from the diffusing inlet surface 11c is diffused toward the second light-emitting section 13. 【0037】 The first light-emitting section 12 is located on the front side of the first lens section 41 and has a linear first light-emitting surface 12a extending in one direction. The first light-emitting surface 12a is composed of a flat or arc-shaped convex curved surface (flat in this embodiment) in the vertical cross-section of the first lens section 41 (second light guide lens 4). Furthermore, the dimensions of the first light-emitting surface 12a in other directions (vertical direction) are smaller than those of the emission surface 10a. 【0038】 In the first light-emitting section 12, the light L1 incident from the first light-collecting incident surface 11a and the second light-collecting incident surface 11b is emitted to the outside from the first light-emitting surface 12a. This makes it possible to make the first light-emitting surface 12a (first light-emitting section 12) emit light in a line shape (hereinafter referred to as "line emission"). 【0039】 The second light-emitting section 13 is located on the upper surface 4a side of the first lens section 41 and has a plurality of second light-emitting surfaces 13a arranged in one direction. The plurality of second light-emitting surfaces 13a are formed on the upper surface 4a side of the first lens section 41 by arranging rectangular light-emitting patterns P extending in the front-rear direction of the first lens section 41 at equal intervals in one direction. 【0040】 Furthermore, the shape and number of light emission patterns P are not particularly limited and can be changed as appropriate to match the design of the vehicle lighting fixture 1. 【0041】 In the second light-emitting section 13, the light L2 incident from the diffusion incident surface 11c is emitted to the outside from multiple second light-emitting surfaces 13a. This makes it possible to make multiple second light-emitting surfaces 13a (second light-emitting section 13) emit light in accordance with the shape of the light emission pattern P (hereinafter referred to as "pattern emission"). 【0042】 Here, the light L1 emitted from the first light-emitting surface 12a (first light-emitting part 12) is focused light, while the light L2 emitted from the second light-emitting surface 13a (second light-emitting part 13) is diffused light. As a result, the first light-emitting surface 12a (first light-emitting part 12) emits light relatively brighter than the second light-emitting surface 13a (second light-emitting part 13). 【0043】 The light-shielding member 5 is made of a resin such as polycarbonate or acrylic containing a light-shielding pigment (for example, black), and has a shape that covers at least the front and top sides (in this embodiment, the front side, top side, and bottom side) of the second light guide lens 4. 【0044】 Furthermore, the light-shielding member 5 is not limited to being formed separately from the second light guide lens 4 described above; for example, the second light guide lens 4 and the light-shielding member 5 may be integrally formed by two-color molding. The light-shielding member 5 can also be formed by a coating film covering the second light guide lens 4. 【0045】 The light-shielding member 5 has a linear first opening 5a that exposes the first light-emitting surface 12a (first light-emitting part 12) to the outside, and a plurality of second openings 5b that expose a plurality of second light-emitting surfaces 13a (second light-emitting parts 13) to the outside. The light-emitting pattern P reflects the shape of these second openings 5b. 【0046】 In the vehicle light fixture 1 of this embodiment, which has the above configuration, the front side can be illuminated in a line by the first light-emitting part 12, and the upper side can be illuminated in a pattern by the second light-emitting part 13. 【0047】 Furthermore, in the vehicle light fixture 1 of this embodiment, by making the first opening 5a and the second opening 5b formed in the light-shielding member 5 narrow, it is also possible to black out the lights when they are not illuminated. 【0048】 Thus, the vehicle light fixture 1 of this embodiment makes it possible to increase the variety of appearances by using the line emission and pattern emission (another type of emission) described above, while also improving the appearance when the light is on and when it is not. 【0049】 Furthermore, in the vehicle lighting device 1 of this embodiment, by arranging the first light guide lens 3 inside the recess 43 provided on the back side of the second light guide lens 4 described above, it is possible to reduce the loss of light L compared to when line-shaped light emission is performed using only the first light guide lens 3, and to improve the utilization efficiency of the light L emitted from the light source 2. 【0050】 Furthermore, in the vehicle lighting device 1 of this embodiment, by making the second incident portion 11 located on the back side of the second light guide lens 4 (first lens portion 41) a Fresnel lens shape, it is possible to significantly shorten the dimensions of the first light guide lens 3 and the second light guide lens 4 in the front-to-back direction. 【0051】 It should be noted that the present invention is not necessarily limited to the embodiments described above, and various modifications can be made without departing from the spirit of the invention. 【0052】 For example, the second light-emitting part 13 can be located in a different position from the first light-emitting part 12 described above, and is not limited to being located on the upper surface side of the second light guide lens 4. For example, it can be placed on the lower surface side of the second light guide lens 4, or on both the upper and lower surfaces of the second light guide lens 4. 【0053】 The vehicle lighting fixture 1 to which the present invention is applied is not particularly limited, and the present invention can be broadly applied to, for example, taillights, position lights, daytime running lights (DRL), reverse lights, turn signals, side marker lamps, etc. 【0054】 Furthermore, the light source 2 can be any light source that emits light L radially, and in addition to the LEDs mentioned above, light-emitting elements such as laser diodes (LDs) can be used. Also, the color of the light emitted by the light source 2 can be changed as appropriate depending on the application of the vehicle lighting device 1, such as red light, white light, or orange light. [Explanation of symbols] 【0055】 1...Vehicle lighting fixture 2...Light source 3...First light guide lens 4...Second light guide lens 5...Light shielding member 6...Circuit board 7...Light guide section 8...First incident section 9...Reflecting section 10...Emitting section 11...Second incident section 11a...First light-gathering incident surface 11b...Second light-gathering incident surface 11c...Diffusing incident surface 12...First light-emitting section 13...Second light-emitting section 41...First lens section 42...Second lens section 43...Recess P...Light emission pattern L...Light

Claims

[Claim 1] Light source and The system includes a first light guide lens and a second light guide lens for guiding the light emitted from the light source, The first light guide lens comprises a light guide portion extending in one direction, A first incident portion is located at one end of the light guide portion and causes light emitted from the light source to enter the interior of the light guide portion, A reflecting portion located on the back side of the light guide portion, which reflects the light guided toward the other end of the light guide portion toward the front side of the light guide portion, It has an output section located on the front side of the light guide section, which emits the light reflected by the reflecting section to the outside of the light guide section, The second light guide lens has a shape that extends in the first direction, A second inlet that directs the light emitted from the aforementioned emission part into the interior from the back side, A first light-emitting unit that emits light by emitting a portion of the light incident from the second incident unit outwards from the front side, It has a second light-emitting part that emits light by emitting a portion of the light incident from the second incident part outwards in a direction other than the first direction, perpendicular to the first direction, The second incident portion comprises a first light-gathering incident surface located in the central part of the back side of the second light guide lens, At least one second focusing incident surface is arranged in a stepped manner from both sides of the first focusing incident surface toward the emission section, The first focusing incident surface and the second focusing incident surface include at least one diffusing incident surface located between adjacent surfaces, The light incident from the first and second focusing incident surfaces is focused toward the first light-emitting section. A vehicle light fixture characterized by diffusing a portion of the light incident from the aforementioned diffusion incident surface toward the second light-emitting part. [Claim 2] The first light-gathering incident surface is composed of a convex curved surface that is curved in an arc shape in a cross-section along the other direction. The second light-gathering incident surface is formed by a curved surface obtained by dividing the central part of a convex curved surface that is curved in an arc shape in a cross section along the other direction, with a groove in between. The vehicle light fixture according to claim 1, characterized in that the diffusion incident surface is composed of surfaces connecting adjacent first and second light-gathering incident surfaces of the groove. [Claim 3] The first light-emitting part and the emission part have a shape that extends in the direction described above. Furthermore, the vehicle light fixture according to claim 1, characterized in that the dimension of the first light-emitting portion in the other direction is smaller than the dimension of the emission portion in the other direction. [Claim 4] The first light-emitting portion is located on the front side of the second light guide lens and has a line-shaped first light-emitting surface extending in the direction of the first, The vehicle lamp according to claim 1, characterized in that the second light-emitting part has a second light-emitting surface located on the upper side of the second light guide lens. [Claim 5] The vehicle lamp according to claim 4, characterized in that the second light-emitting part has a plurality of second light-emitting surfaces arranged in the one direction. [Claim 6] The second light guide lens is provided with a light-shielding member that covers at least the front and top surfaces, The vehicle lamp according to claim 4, characterized in that the light-shielding member has a first opening that exposes the first light-emitting surface to the outside and a second opening that exposes the second light-emitting surface to the outside.

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