Light emitting device

Abstract

To provide a light emitting device that can stably support a light guide body while ensuring a light emitting portion.SOLUTION: A light emitting device comprises: a light guide body 10 that guides light from a light source and emits the light, and is formed into a plate shape; a first case 21 and a second case 22 that face each other in a thickness direction T of the light guide body 10, and sandwich the light guide body 10; and an annular elastic material 40 that is fitted into a groove 10a formed in the light guide body 10 and surrounds the light guide body 10. The first case 21 and the second case 22 support the light guide body 10 while compressing the annular elastic material 40 in the thickness direction T.SELECTED DRAWING: Figure 12

Description

Technical Field

[0001] The present disclosure relates to a light-emitting device.

Background Art

[0002] For example, Patent Document 1 describes a light-emitting device including a light guide that guides light emitted from a light source to a light-transmitting portion and causes the light-transmitting portion to emit light.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Unlike the device described in Patent Document 1, when it is desired to allow a user to visually recognize the light emission of the light guide itself, a structure that stably supports the light guide while securing a light-emitting portion is required.

[0005] The present disclosure has been made in view of the above circumstances, and an object thereof is to provide a light-emitting device capable of stably supporting a light guide while securing a light-emitting portion.

Means for Solving the Problems

[0006] To achieve the above object, a light-emitting device according to the present disclosure includes a light guide that guides light from a light source to the inside and emits light, and is formed in a plate shape, and a first case and a second case that face each other in the thickness direction of the light guide and sandwich the light guide, and an annular elastic material that is fitted into a groove formed in the light guide and surrounds the light guide, and the first case and the second case support the light guide while compressing the annular elastic material in the thickness direction.

Effects of the Invention

[0007] According to the present disclosure, the light guide can be stably supported while securing a light-emitting portion.

Brief Description of the Drawings

[0008]

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Embodiments for Carrying Out the Invention

[0009] An embodiment of the present disclosure will be described with reference to the drawings.

[0010] (First Embodiment) The light-emitting system 1 shown in FIG. 1 is provided on a saddle-type vehicle 2 and is a system that notifies a user (the driver of the saddle-type vehicle 2) of various information by the light emission of a light-emitting device 3. The saddle-type vehicle 2 is, for example, a motorcycle (motorized two-wheeler), but any type in which a user sits on a saddle is acceptable, and it may be a trike (motorized three-wheeler) or the like.

[0011] The light-emitting system 1 includes a windshield 2a of the saddle-type vehicle 2, a light-emitting device 3 provided inside (on the user side) of the windshield 2a and composed of a separate member from the windshield 2a, a control device 4, and an external light sensor 5. The windshield 2a is a front cowl including a light-transmitting portion.

[0012] Two light-emitting devices 3 are provided inside (on the user side) of the windshield 2a, one is located at the left end of the windshield 2a, and the other is located at the right end of the windshield 2a. Hereinafter, among the two light-emitting devices 3, the one located at the left end is referred to as the light-emitting device 3L, and the one located at the right end is referred to as the light-emitting device 3R, and they may be distinguished by reference numerals. Although the light-emitting devices 3L and 3R are provided on the windshield 2a in a left-right symmetric arrangement as viewed from the user, since their respective structures are the same, mainly, both will be described as the light-emitting device 3 without distinction. Note that the light-emitting device 3 shown in FIGS. 3 to 5 shows the light-emitting device 3L located at the left end.

[0013] The light-emitting device 3 is supported by a support 2b provided inside the windshield 2a and is positioned at a distance from the windshield 2a as shown in FIG. 2.

[0014] The light-emitting device 3 includes a light guide 10, a case 20, and a circuit board 30 on which a light source 31 is mounted, as shown in FIGS. 3 to 5. Note that in FIGS. 4, 8, and 9, the light guide 10 is schematically represented in a perspective view-like manner.

[0015] The light guide 10 guides the light from the light source 31 inside and emits light. The light guide 10 is a member formed in a plate shape from a material having light transmissivity and light guiding properties such as acrylic.

[0016] The light guide 10 has an inner surface 11 and an outer surface 12 that face each other in the thickness direction T (see FIG. 3) of the light guide 10 and have a front-back relationship with each other, an upper end surface 13 that connects the upper ends of the inner surface 11 and the outer surface 12, a lower end surface 14 that connects the lower ends of the inner surface 11 and the outer surface 12, and two side surfaces 15, 16. The inner surface 11 is the surface that faces the user when the light emitting device 3 is mounted on the saddle-type vehicle 2.

[0017] The case 20 includes a first case 21 and a second case 22 that face each other in the thickness direction T of the light guide 10, and is formed of metal or resin. The case 20 is configured by combining the first case 21 and the second case 22.

[0018] The first case 21 and the second case 22 according to the first embodiment are each formed in an L shape. The first case 21 and the second case 22 of this shape support the light guide 10 by sandwiching each of the lower end portion of the light guide 10 and the lateral end portion of the light guide 10. The lower end portion of the light guide 10 is a portion having a predetermined width upward from the lower end surface 14 of the light guide 10. The lateral end portion of the light guide 10 is a portion having a predetermined width inward from the side surface 15 or the side surface 16 of the light guide 10 (in the example shown in FIGS. 3 and 4, a portion having a predetermined width inward from the side surface 15).

[0019] The first case 21 and the second case 22 are fixed to each other by known fixing means such as screwing, engaging, fitting, and adhesion, and sandwich the light guide 10 in the thickness direction T. Note that the thickness (length in the thickness direction T) of each of the first case 21 and the second case 22 is arbitrary. Also, in the first case 21 and the second case 22 according to the first embodiment, a structure may be adopted in which the light guide 10 is supported while compressing the annular elastic material 40 in the thickness direction T as described in the second embodiment described later.

[0020] The circuit board 30 is composed of a PCB (Printed Circuit Board) on which the light source 31 is mounted, and as shown in FIG. 4, it is supported by a board support portion 20a provided in the case 20. The board support portion 20a may be separate from the case 20, or may be integrated with at least one of the first case 21 and the second case 22.

[0021] As shown in FIG. 5, the light source 31 is composed of, for example, an LED (Light Emitting Diode), faces the lower end surface 14 of the light guide 10, and emits light L toward the lower end surface 14 (that is, emits light L upward). Here, the inner surface 11 of the light guide 10 is subjected to a light diffusion process for reflecting and diffusing the light L from the light source 31 guided into the interior from the lower end surface 14. As a result, the inner surface 11 emits light (surface emission) based on the light L. The light diffusion process is, for example, circular or elliptical dots (either concave or convex) formed on the inner surface 11, but other portions having at least one of the concave and convex shapes may be sufficient. Further, as long as the user can visually recognize the surface emission, the light diffusion process may be applied to at least one of the inner surface 11 and the outer surface 12.

[0022] As shown in FIG. 5, the region of the light guide 10 where the light diffusion process is applied includes a first region R1 and a second region R2 that is farther from the light source 31 than the first region R1. That is, the second region R2 is a region above the first region R1. And the second region R2 has a higher degree of light diffusion than the first region R1. This can be realized, for example, by applying a light diffusion process to the light guide 10 so as to satisfy at least one of (i) making the diameter of the dots formed in the second region R2 larger than that in the first region R1 and (ii) making the density of the dots formed in the second region R2 higher than that in the first region R1. Thereby, it is possible to reduce the unevenness of surface emission caused by the light L emitted from the light source 31 and attenuating more as it travels upward.

[0023] In addition, a plurality (three in this embodiment as an example) of light sources 31 are provided. By controlling the lighting and blinking operations of each of the plurality of light sources 31 individually under the control of the control device 4 electrically connected to the circuit board 30, the area of the surface light emission of the light guide 10 (hereinafter referred to as the surface light emission area) changes. Note that the plurality of light sources 31 may emit light of the same color or may include LEDs that emit light of different colors from each other.

[0024] FIG. 8 is an example of changing the light emission pattern of the light guide 10 by the surface light emission areas A1, A2, and A3 that switch so as to move from right to left in time series in the light emitting device 3L located at the left end of the windshield 2a. Thereby, for example, it is possible to notify the user that some object is approaching from the right side of the saddle type vehicle 2. Although not shown in FIG. 8, the light emission pattern of the light guide 10 can be similarly changed in the light emitting device 3R located at the right end of the windshield 2a.

[0025] FIG. 9 is an example of the light emission pattern of the light guide 10 by the combination of the surface light emission areas B1, B2, and B3 that switch so as to move from right to left in time series in the light emitting device 3L and the C1, C2, and C3 that switch so as to move from left to right in time series in the light emitting device 3R corresponding thereto. According to this example, it is possible to notify the user that some object is approaching from the front of the saddle type vehicle 2. In FIG. 9, the surface light emission areas B1, B2, and B3 in the light emitting device 3L are each formed in a strip shape. This mode can be realized, for example, by not performing a light diffusion process on a portion corresponding to the boundary between adjacent areas among the surface light emission areas B1, B2, and B3, or by forming a light shielding layer on the portion corresponding to the boundary. The same applies to the surface light emission areas C1, C2, and C3 in the light emitting device 3R.

[0026] Further, although not shown, by causing the light guide 10 of the light emitting device 3L to emit surface light over the entire area while not causing the light guide 10 of the light emitting device 3R to emit light, information regarding the right direction can be notified to the user. Conversely, by causing the light guide 10 of the light emitting device 3R to emit surface light over the entire area while not causing the light guide 10 of the light emitting device 3L to emit light, information regarding the left direction can be notified to the user. Also, by causing the light guides 10 of each of the light emitting devices 3R and 3L to emit surface light over the entire area, information regarding the forward direction can be notified to the user.

[0027] The light guide 10 not only emits surface light as described above, but also the upper end surface 13 and the side surface 16 emit light in response to the lighting or blinking of the plurality of light sources 31. In particular, in order to effectively allow the user to visually recognize the light emission of the upper end surface 13, as shown in FIG. 6, the case 20 (that is, the first case 21 and the second case 22) is provided so as to incline the light guide 10 from the vertical direction V toward the user of the saddle-type vehicle 2. The θ shown in FIG. 6 indicates the inclination angle of the case 20 with respect to the vertical direction V. Here, the case 20 is supported by a support 2b provided inside the windshield 2a via a pedestal 20b located below it. For example, due to the shape of this pedestal 20b, the case 20 is provided so as to incline the light guide 10 from the vertical direction V toward the user of the saddle-type vehicle 2. Note that the pedestal 20b may be integral with the case 20 or may be a separate body.

[0028] Furthermore, as a modified example shown in FIG. 7, the light guide 10 may be formed such that the angle formed by the inner surface 11 and the upper end surface 13 is an acute angle. Thereby, the light L from the light source 31 reflected by the upper end surface 13 becomes more likely to be directed toward the viewpoint P of the user, and the light emission of the upper end surface 13 can be more effectively visually recognized by the user.

[0029] The control device 4 is a computer that controls the operation of the light-emitting device 3, and is composed of a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), a drive circuit that drives the light source 31, and the like. Note that the ROM includes an EEPROM (Electrically Erasable Programmable ROM). For example, the control device 4 individually controls the lighting and blinking operations of each of the plurality of light sources 31.

[0030] In addition, the control device 4 is connected to various ECUs (Electric Control Units) mounted on the saddle-type vehicle 2 through CAN (Controller Area Network) communication, and executes various controls by using the data detected by each other. For example, a well-known ADAS (Advanced Driver Assistance System) is constructed in the saddle-type vehicle 2 by the control device 4 and various ECUs. By this ADAS, various processes such as FCW (Front Collision Warning), LDW (Lane Departure Warning), and BSD (Blind Spot Detection) can be executed, and the control device 4 changes the light emission pattern of the light guide 10 according to these processes. In addition, the control device 4 acquires a signal from the external light sensor 5 described below.

[0031] The external light sensor 5 is, for example, an illuminance sensor that detects the illuminance of external light, and outputs a signal corresponding to the brightness (illuminance) of the received external light to the control device 4. In the ROM of the control device 4, there is stored dimming data that is predetermined data and shows the relationship between the brightness of the external light (the value indicated by the signal S from the external light sensor 5) and the brightness (luminance B) of the light source 31, which is shown by a curve as in FIG. 10. The control device 4 functions as a dimming control unit that controls the brightness of the light source 31 based on the signal S from the external light sensor 5 and the dimming data.

[0032] When a set value Q indicating the brightness preferred by the user is set from the user via input means (not shown), the control device 4 determines an automatic dimming range R based on the set value Q. The automatic dimming range R is a range that defines the lower limit brightness Bmin and the upper limit brightness Bmax when the light source 31 emits light (synonymous with a range that defines a signal lower limit value Smin corresponding to the lower limit brightness Bmin and a signal upper limit value Smax corresponding to the upper limit brightness Bmax). Specifically, when the value indicated by the signal S from the ambient light sensor 5 is equal to or greater than the signal lower limit value Smin and equal to or less than the signal upper limit value Smax, the control device 4 causes the light source 31 to emit light at a brightness B corresponding to the value indicated by the signal S in the dimming data. Further, when the value indicated by the signal S from the ambient light sensor 5 is less than the signal lower limit value Smin, the control device 4 causes the light source 31 to emit light at the lower limit brightness Bmin as a fixed value. Further, when the value indicated by the signal S from the ambient light sensor 5 is greater than the signal upper limit value Smax, the control device 4 causes the light source 31 to emit light at the upper limit brightness Bmax as a fixed value. Thereby, in the light emitting device 3, light emission reflecting the user's preference is performed, which is user-friendly. That is, the control device 4 functioning as a dimming control unit is determined according to the setting by the user of the saddle-type vehicle 2, and controls the brightness of the light source 31 within the automatic dimming range R which is the range of the lower limit and the upper limit of the brightness of the light source 31.

[0033] The description of the first embodiment is above. Subsequently, the light emitting device 3v according to the second embodiment will be described with reference to FIGS. 11 to 14. Hereinafter, for configurations having the same functions as those of the first embodiment, the same reference numerals as those of the first embodiment will be used, and the description will focus on the differences from the first embodiment.

[0034] (Second Embodiment) The light emitting device 3v according to the second embodiment includes a light guide 10 and a circuit board 30 on which the light source 31 is mounted (not shown in FIGS. 11 to 14). Further, the light emitting device 3v includes a case 20 having a shape different from that of the first embodiment and an annular elastic member 40 shown in FIGS. 12 to 14.

[0035] The case 20 includes a first case 21 and a second case 22 that face each other in the thickness direction T of the light guide 10. The case 20 is constituted by combining the first case 21 and the second case 22. The first case 21 and the second case 22 according to the second embodiment support the light guide 10 by sandwiching the lower end portion of the light guide 10 as shown in FIGS. 11 and 12. The first case 21 and the second case 22 are fixed to each other by known fixing means such as screwing, engaging, fitting, and adhesion, and sandwich the light guide 10 in the thickness direction T.

[0036] The annular elastic member 40 is an O-ring made of an elastomer such as rubber and is provided to surround the light guide 10. The annular elastic member 40 functions as a sealing material that fills the space between the light guide 10 and each of the first case 21 and the second case 22. Specifically, the annular elastic member 40 is fitted into a groove 10a formed in the light guide 10. The groove 10a is provided over the entire circumference of the portion of the light guide 10 that is covered by the first case 21 and the second case 22. As shown in FIG. 12, the first case 21 and the second case 22 support the light guide 10 while compressing the annular elastic member 40 in the thickness direction T.

[0037] As shown in FIG. 14, the first case 21 has a first contact wall 21a that contacts the annular elastic member 40, and the second case 22 has a second contact wall 22a that contacts the annular elastic member 40. And the interval (interval in the thickness direction T) between the portion of the first contact wall 21a facing the side surface 15 of the light guide 10 and the portion of the second contact wall 22a facing the side surface 15 becomes narrower as it moves away from the side surface 15. Similarly, the interval (interval in the thickness direction T) between the portion of the first contact wall 21a facing the side surface 16 of the light guide 10 and the portion of the second contact wall 22a facing the side surface 16 becomes narrower as it moves away from the side surface 16. In this way, in the portions corresponding to the side surface 15 and the side surface 16 respectively, by making the inner shape formed by the first contact wall 21a and the second contact wall 22a tapered, it is possible to suppress the force applied to the annular elastic member 40 from escaping in a direction perpendicular to the thickness direction T, which is the main compression direction, and effectively exert the sealing function of the annular elastic member 40.

[0038] Further, among the first contact wall 21a and the second contact wall 22a, portions C1 to C4 corresponding to the four corners of the light guide 10 are formed in a curved surface shape (R shape). Thereby, when the annular elastic member 40 is compressed by the first case 21 and the second case 22, it is possible to suppress the generation of a gap between the annular elastic member 40 and each of the first contact wall 21a and the second contact wall 22a. As a result, the waterproof effect is good. This is the description of the second embodiment.

[0039] The present invention is not limited by the above embodiments and drawings. It is possible to appropriately make changes (including deletion of components) without changing the gist of the present invention.

[0040] The light-emitting devices 3 and 3v included in the light-emitting system 1 described above can be described from the viewpoints described in the following Appendices 1 to 3.

[0041] (Appendix 1) (Appendix 1-1) A light-emitting device provided inside a windshield of a saddle-type vehicle and composed of a member different from the windshield, comprising a light source and a light guide that guides light from the light source to the inside and emits light, provided in two on the windshield, one located at the left end of the windshield and the other located at the right end of the windshield, Light-emitting device.

[0042] According to the light-emitting device described in Appendix 1-1, since the light-emitting patterns of the two light-emitting devices, which are composed of members different from the windshield, can be used, it is easy for the user to recognize the desired information by the light emission.

[0043] (Appendix 1-2) There are a plurality of the light sources, and the lighting and flashing operations of each are individually controlled, The light-emitting device described in Appendix 1-1.

[0044] According to the light-emitting device described in Appendix 1-2, since a dynamic light-emitting pattern of the light guide can be realized, It is possible to notify the user of various information.

[0045] (Appendix 1-3) The light guide includes a surface facing the user of the saddle-type vehicle, emits surface light based on light from a plurality of the light sources, By individually controlling the lighting and blinking operations of each of the plurality of the light sources, the area where the light guide emits surface light changes. The light-emitting device according to Appendix 1-2.

[0046] According to the light-emitting device described in Appendix 1-3, it is easier for the user to notice the notification by light emission.

[0047] (Appendix 1-4) The light-emitting device according to any one of Appendices 1-1 to 1-3, An ambient light sensor that outputs a signal according to the brightness of the received ambient light, A dimming control unit that is predetermined data and controls the brightness of the light source according to a signal from the ambient light sensor based on dimming data indicating the relationship between the brightness of the ambient light and the brightness of the light source, and is provided on the saddle-type vehicle. A lighting system, The dimming control unit is determined according to the setting by the user of the saddle-type vehicle, and controls the brightness of the light source within an automatic dimming range that is the range of the lower limit and the upper limit of the brightness of the light source. Lighting system.

[0048] According to the lighting system described in Appendix 1-4, as described above, it is user-friendly.

[0049] (Appendix 2) (Appendix 2-1) A light guide that guides light from a light source to the inside and emits light, and is formed in a plate shape, A first case and a second case that face each other in the thickness direction of the light guide and sandwich the light guide, An annular elastic material that is fitted into a groove formed in the light guide and surrounds the light guide, and is provided. The first case and the second case support the light guide while compressing the annular elastic material in the thickness direction. Light-emitting device.

[0050] According to the light-emitting device described in Supplementary Note 2-1, the light guide can be stably supported while securing a light-emitting portion.

[0051] (Supplementary Note 2-2) The first case has a first contact wall that contacts the annular elastic material. The second case has a second contact wall that contacts the annular elastic material. The distance between the portion of the first contact wall facing the side surface of the light guide and the portion of the second contact wall facing the side surface becomes narrower as it moves away from the side surface. The light-emitting device described in Supplementary Note 2-1.

[0052] According to the light-emitting device described in Supplementary Note 2-2, as described above, the sealing function by the annular elastic material can be effectively exhibited.

[0053] (Supplementary Note 2-3) Among the first contact wall and the second contact wall, the portions corresponding to the four corners of the light guide are formed in a curved surface shape. The light-emitting device described in Supplementary Note 2-2.

[0054] According to the light-emitting device described in Supplementary Note 2-3, as described above, the waterproof effect is good.

[0055] (Supplementary Note 2-4) It is provided inside the windshield of a saddle-type vehicle. The first case and the second case support the light guide by sandwiching at least the lower end portion of the light guide. The light-emitting device according to any one of Supplementary Notes 2-1 to 2-3.

[0056] According to the light-emitting device of Supplementary Note 2-4, the application to a saddle-type vehicle is simple.

[0057] (Supplementary Note 3) (Appendix 3-1) A light-emitting device provided inside the windshield of a saddle-type vehicle, comprising a light guide formed in a plate shape that guides light from a light source inside and emits light, a first case and a second case that face each other in the thickness direction of the light guide, and a circuit board located inside the first case and the second case and on which the light source is mounted. The light source faces the lower end surface of the light guide, and the first case and the second case support the light guide by sandwiching at least the lower end portion of the light guide. Light-emitting device.

[0058] According to the light-emitting device described in Appendix 3-1, since the light guide can be made to emit light instead of the windshield itself, it is easy for the user to recognize the desired information by the emitted light.

[0059] (Appendix 3-2) The first case and the second case are provided so as to incline the light guide from the vertical direction toward the user of the saddle-type vehicle. The light-emitting device described in Appendix 3-1.

[0060] According to the light-emitting device described in Appendix 3-2, as described above, the light emission from the upper end surface of the light guide can be effectively visually recognized by the user.

[0061] (Appendix 3-3) The light guide has an inner surface and an outer surface that face each other in the thickness direction of the light guide and are in a front-back relationship with each other. At least one of the inner surface and the outer surface is subjected to a light diffusion process for diffusing the light from the light source guided inside the light guide. The region of the light guide where the light diffusion process is performed includes a first region and a second region that is farther from the light source than the first region. The second region has a higher degree of light diffusion than the first region. The light-emitting device described in Appendix 3-1 or 3-2.

[0062] According to the light-emitting device described in Supplementary Note 3-3, it is possible to reduce the unevenness of surface light emission caused by the light emitted from the light source and attenuated thereby.

[0063] (Supplementary Note 3-4) The light guide has an upper end surface connecting the upper ends of each of the inner surface and the outer surface, The angle formed by the inner surface and the upper end surface is an acute angle. The light-emitting device described in Supplementary Note 3-3.

[0064] According to the light-emitting device described in Supplementary Note 3-4, as described above, the light emission from the upper end surface can be effectively visually recognized by the user.

[0065] In the above description, for the sake of facilitating the understanding of the present disclosure, the description of known technical matters has been appropriately omitted.

[0066] This invention can be implemented in various embodiments and modifications without departing from the broad spirit and scope of this invention. Also, the above-described embodiments are for explaining this invention and do not limit the scope of this invention. That is, the scope of this invention is indicated by the claims rather than the embodiments. And various modifications made within the scope of the claims and within the scope of the meaning of the invention equivalent thereto are considered to be within the scope of this invention.

Explanation of Reference Numerals

[0067] 1... Light-emitting system 2... Saddle-type vehicle, 2a... Windshield, 2b... Support 3, 3v... Light-emitting device 4... Control device 5... External light sensor 10... Light guide, 10a... Groove 11... Inner surface, 12... Outer surface, 13... Upper end surface, 14... Lower end surface, 15, 16... Side surfaces 20... Case, 20a... Substrate support portion, 20b... Pedestal 21... First case, 21a... First contact wall 22... Second case, 22a... Second contact wall 30…Circuit board, 31…Light source 40…Annular elastic material R1…First region, R2…Second region L…Light, A1~A3, B1~B3, C1~C3…Surface light-emitting regions T…Thickness direction, V…Vertical direction, P…Viewpoint, R…Automatic dimming range S…Signal, Smin…Signal lower limit value, Smax…Signal upper limit value B…Luminance, Bmin…Lower luminance, Bmax…Upper luminance C1~C4…Parts corresponding to the four corners of the light guide 10

Claims

1. A light guide body that is formed in a plate shape and guides light from a light source to emit light inside, a first case and a second case that face each other in the thickness direction of the light guide body and sandwich the light guide body, and an annular elastic material that is fitted into a groove formed in the light guide body and surrounds the light guide body. The first case and the second case support the light guide body while compressing the annular elastic material in the thickness direction. A light emitting device.

2. The first case has a first contact wall that contacts the annular elastic material, the second case has a second contact wall that contacts the annular elastic material, and the distance between a portion of the first contact wall facing the side surface of the light guide body and a portion of the second contact wall facing the side surface becomes narrower as it moves away from the side surface. The light emitting device according to Claim 1.

3. Portions of the first contact wall and the second contact wall corresponding to the four corners of the light guide body are formed in a curved surface shape. The light emitting device according to Claim 2.

4. It is provided inside the windshield of a saddle-type vehicle. The first case and the second case support the light guide body by sandwiching at least the lower end portion of the light guide body. The light emitting device according to any one of Claims 1 to 3.

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