Light-emitting device and switch device

Abstract

To suppress variation in brightness at an illumination part.SOLUTION: A light-emitting device 11 includes at least two light sources 35, 36 arranged in a first direction, and a light guide body 9 disposed facing the light sources 35, 36. When viewed from a direction in which the light sources 35, 36 face the light guide body 9, a light reception surface 94 of the light guide body 9 overlaps with light-emitting surfaces 35a, 36a of the light sources 35, 36. When viewed from the facing direction, on the light reception surface 94, concave parts 95, 96 are provided in regions facing the light-emitting surfaces 35a, 36a of the light sources 35, 36. The concave parts 95, 96 are arranged on the one-to-one basis with respect to the light sources 35, 36 in a direction where the light sources 35, 36 are arranged.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present invention relates to a light-emitting device and a switch device. [Background technology]

[0002] Patent Document 1 discloses a light guide device that can uniformly illuminate key tops. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2017-91928 Summary of the Invention

[0004] This light guide device constitutes a part of a switch device whose main components are an operation button operated by a user and a light guide that guides light from a light source to the key top of the operation button. In the switch device, a printed circuit board is arranged perpendicular to the operating direction of the operation button. A light guide is provided inside the key top and extends toward the printed circuit board. The lower end surface of the light guide faces a light source provided on the printed circuit board. [Problem to be solved by the invention]

[0005] Here, when lighting the key top with two light sources arranged side by side on a printed circuit board, variations in brightness may occur in the illuminated areas of the key top. Therefore, when illuminating a keytop using two light sources arranged side by side on a printed circuit board and one light guide, it is necessary to be able to suppress variations in brightness in the illuminated area. [Means for solving the problem]

[0006] In this case, at least two light sources aligned in a first direction; a light guide disposed opposite the light source, When viewed from a direction in which the light source and the light guide face each other, a light receiving surface of the light guide overlaps with a light emitting surface of the light source, The light emitting device comprises: a first light emitting device that illuminates a first illumination portion; a second light emitting device that illuminates a second illumination area that is larger in area than the first illumination area; In the first light emitting device, A recessed portion is provided on a surface of the light guide facing the light source, the recessed portion being made up of a pair of inclined surfaces whose distance from the light source changes continuously in the arrangement direction of the light sources, The recesses are arranged one-to-one with respect to the light sources, The array of light sources Arranged in the same direction And, In the second light emitting device, the recess is not provided on the surface of the light guide facing the light source. The light emitting device has the following configuration. [Effects of the Invention]

[0007] According to the present invention, it is possible to suppress variations in brightness in the illuminated area. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. [Figure 2] FIG. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] FIG. 4 is a diagram illustrating a cover member. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] 4A and 4B are diagrams illustrating the positional relationship between a light guide and a light source. [Figure 9] FIG. [Figure 10] FIG. [Figure 11] FIG. [Figure 12] 4A and 4B are diagrams illustrating the positional relationship between a light guide and a light source. [Figure 13] 10A and 10B are diagrams illustrating the function of a light guide body. [Figure 14] 10A and 10B are diagrams illustrating the function of a light guide body. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, an embodiment of the present invention will be described by taking as an example a case where the embodiment is applied to a switch device 1 for a vehicle. Fig. 1 is an exploded perspective view of the switch device 1. Fig. 2 is a perspective view of the switch device 1. Fig. 3 is a cross-sectional view of the switch device 1. Fig. 3 is a schematic cross-sectional view of a switch 5A portion of the switch device 1 taken along plane A in Fig. 2. 4 is a cross-sectional view of the switch device 1. FIG. 4 is a schematic cross-sectional view of the switch 5A taken along line BB in FIG.

[0010] In the following description, when explaining the positional relationship of the components of the switch device 1, the XYZ directions in Fig. 1 will be used as a reference. When explaining the positional relationship of the components, the terms "upper side" and "lower side" may be used as necessary, based on the vertical direction along the Z direction in Fig. 1.

[0011] As shown in FIG. 2, the switch device 1 includes a total of four switches 5 (5A to 5D). At the top of the case 2, the operated portion 51 of each switch 5 (5A to 5D) is exposed. Each of the switches 5 (5A to 5D) is assigned a different function. As an example, if the switch device 1 is a switch device used to specify the driving mode of a vehicle, functions such as parking (P), reverse driving (R), neutral (N), and forward driving (D) are assigned to each of the switches 5A to 5D.

[0012] In the switch device 1, when any one of the switches 5A to 5D is pressed, the function assigned to the pressed switch 5 is designated, and the designation of the function that had been designated up to that point is terminated.

[0013] As shown in FIG. 3, the switch 5A has an operated part 51 that is operated by a user, a movable body 6 that displaces in conjunction with the operation of the operated part 51, a light guide 9A arranged inside the movable body 6, and light sources 35 and 36 arranged on a printed circuit board 34. As shown in FIG. 1, the light guides 9 (9A to 9D) are made of a resin material such as polycarbonate. One light guide 9 (9A to 9D) is provided for each switch 5 (5A to 5D). One light source 35, 36 is also provided for each switch 5 (5A to 5D). In this embodiment, a pair of light sources 35, 36 is provided for each of the switches 5A, 5B, 5C, and 5D. The light sources 35, 36 are aligned on the printed circuit board 34 in the width direction of the light guides 9A, 9B, 9C, and 9D at positions facing the light guides 9A, 9B, 9C, and 9D of the switches 5A, 5B, 5C, and 5D, respectively. In the following description, when switches 5A, 5B, 5C, and 5D and light guides 9A, 9B, 9C, and 9D are not particularly distinguished from each other, they will be simply referred to as switches 5 and light guides 9.

[0014] As shown in FIG. 4, the switch 5A further includes a magnet 10 attached to the movable body 6 and a magnetic sensor 7 (Hall IC: detection element) that detects a change in the magnetic force of the magnet 10 due to displacement of the movable body 6. The printed circuit board is shared by the four switches 5 (5A to 5D). Therefore, four supports 75 for supporting the magnetic sensors 7 are provided on the printed circuit board . Here, the switches 5 (5A to 5D), the light guides 9 (9A to 9D), and the light sources 35 and 36 constitute the light emitting device 11 of the present invention.

[0015] As shown in Fig. 3, the printed circuit board 34 is housed inside the cover 3 that closes the lower opening of the case 2. As shown in Fig. 3, the cover 3 has a bottom wall portion 31 and a peripheral wall portion 32 that surrounds the entire outer periphery of the bottom wall portion 31. The peripheral wall portion 32 is provided in a direction that is approximately perpendicular to the bottom wall portion 31. The peripheral wall portion 32 is formed at the same height over the entire circumferential direction. The cover 3 is attached to the case 2 with screws (not shown) in a state where the peripheral wall portion 32 is fitted into the lower opening of the case 2.

[0016] A support base 33 for a printed circuit board 34 is provided inside the peripheral wall portion 32. The support base 33 protrudes in the same direction as the peripheral wall portion 32. A plurality of support bases 33 are provided on the bottom wall portion 31. The printed circuit board 34 is placed on the upper end of the support base 33. As shown in FIG. 3, a cover member 8 made of an elastic material is placed on the printed circuit board .

[0017] As shown in Fig. 1, switches 5A, 5C, and 5D are push-button switches and have the same basic configuration. Switch 5B is a rocking switch. Switch 5D has the same basic configuration as switch 5A, but the width of a light guide 9D (described below) is wider than the width of light guide 9A of switch 5A.

[0018] The basic configuration of the switch 5A will be described below as a representative example of a push switch. As shown in Figure 3, the operated portion 51 (operator) of the switch 5A has a pressed portion 510 (key top), a peripheral wall portion 511 that surrounds the entire outer periphery of the pressed portion 510, and a connecting portion 512 that extends inside the peripheral wall portion 511 in the same direction as the peripheral wall portion 511. The central region of the upper surface of the pressable portion 510 is an illuminated portion 515, and light from light sources 35 and 36 is irradiated via light guide 9A onto the back surface of illuminated portion 515 on the side of printed circuit board 34 (the lower side in the figure). An identifier (mark) is provided on the upper surface of illuminated portion 515 to make the function assigned to switch 5A visible. Light can pass through the identifier portion in the illuminated region, and irradiation with illumination light improves the visibility and design of the identifier.

[0019] A through hole 20 that connects the inside and outside of the case 2 is provided in the upper part of the case 2. A peripheral wall 21 that surrounds the through hole 20 is provided in the upper part of the case 2. The peripheral wall 21 extends linearly upward on the opposite side from the printed circuit board 34. In the case 2, a peripheral wall 511 of the operated unit 51 is fitted onto the outside of the peripheral wall 21. Furthermore, in the case 2, a peripheral wall 61 (first wall 611) of the movable body 6 penetrates the inside of the peripheral wall 21 in the direction of the axis Z1. Here, the axis Z1 is a straight line that is perpendicular to the upper surface 34a of the printed circuit board 34 and follows the displacement direction of the movable body 6.

[0020] The movable body 6 is supported by the peripheral wall 21 on the case 2 side so as to be movable in the direction of the axis Z1. In the movable body 6, the connecting portion 512 of the operated portion 51 is inserted inside the peripheral wall 61 (second wall portion 612). A protrusion 615 protruding from the inner circumference of the peripheral wall 61 (second wall portion 612) engages with an engagement hole 512a on the tip side of the connecting portion 512. In this embodiment, the operated portion 51 and the movable body 6 are connected by the protrusion 615 on the movable body 6 engaging with the engagement hole 512a. This allows the movable body 6 to be displaced in the direction of the axis Z1 in conjunction with the pressing operation of the operated portion 51.

[0021] Fig. 5 is a diagram schematically illustrating the cover member 8 as viewed from the case 2 side. For ease of explanation, Fig. 5 shows a simplified view by omitting the depiction of the fine irregularities on the surface of the cover member 8. Furthermore, in Fig. 5, to illustrate the correspondence between the portions (placing portion 82, accommodating portion 83) protruding from the base portion 81 and the switches 5A to 5D, the corresponding portions (placing portion 82, accommodating portion 83) for each of the switches 5A to 5D are shown surrounded by dashed lines.

[0022] 5, the cover member 8 has a base portion 81, a mounting portion 82, a storage portion 83, and a light-transmitting area 84. The cover member 8 is an integrated part made of a flexible elastic material such as rubber. It is formed to a size that can cover the entire top surface of the printed circuit board 34. The base 81 is a portion that is placed on the printed circuit board 34 (see FIG. 3). The mounting portion 82 is a portion that supports the movable body 6 so that it can be displaced in the direction of the axis Z1 (up and down direction in the figure) (see FIG. 3). The accommodation portion 83 is a portion that accommodates the magnetic sensor 7 and the support body 75 (see FIG. 4). The light-transmitting region 84 is a portion that is formed to be thinner than other portions. The light-transmitting region 84 is located above the light sources 35, 36 on the printed circuit board 34. The light-transmitting region 84 is formed to a thickness that allows light to pass through while suppressing a decrease in the amount of light irradiated from the light sources 35, 36.

[0023] 5, in the cover member 8, a pair of mounting portions 82, 82, one housing portion 83, and one light-transmitting area 84 are assigned to each switch. In the figure, the mounting portions 82, 82, the housing portion 83, and the light-transmitting area 84 in the area surrounded by a dashed line and labeled 5A are the area for switch 5A. In the figure, the mounting portions 82, 82, the housing portion 83, and the light-transmitting area 84 in the area surrounded by a dashed line and labeled 5D are the area for switch 5D.

[0024] As shown by hidden lines in Fig. 5, the light sources 35 and 36 are located on the far side of the light transmitting area 84. The light sources 35 and 36 of the switches 5A to 5C are arranged side by side in the vertical direction (X direction) in the figure. The light sources 35 and 36 of the switch 5D are arranged side by side in the horizontal direction (Y direction) in the figure. 3, the light sources 35 and 36 are, for example, LEDs. The light sources 35 and 36 are arranged with their light emission surfaces facing upward. In this embodiment, the wavelength of light emitted by the light source 35 is different from the wavelength of light emitted by the light source 36. For example, the light source 35 emits white light, while the light source 36 emits orange light. 3, light guide 9A is located on the opposite side of printed circuit board 34 from light transmission region 84. A light receiving surface 94 (incident surface) of light guide 9A and the light emitting surfaces of light sources 35 and 36 are disposed opposite each other with light transmission region 84 sandwiched therebetween (see FIG. 8).

[0025] As shown in FIG. 3, the mounting portion 82 is composed of a cylindrical contact portion 821, a support wall portion 822 that surrounds the entire outer periphery of the contact portion 821, and a stopper portion 823 that connects to the lower end of the contact portion 821. The contact portion 62 on the movable body 6 side is placed on the upper end of the contact portion 821. The stopper portion 823 is a cylindrical portion that is arranged concentrically with the contact portion 821. The stopper portion 823 is formed with a smaller outer diameter than the contact portion 821. The support wall portion 822 extends from the boundary between the abutment portion 821 and the stopper portion 823 toward the printed circuit board 34. The support wall portion 822 connects the abutment portion 821 and the base portion 81. The support wall portion 822 is inclined such that an inner diameter R822 increases as it moves away from the abutment portion 821 toward the printed circuit board 34. The support wall portion 822 holds the abutment portion 821 at a position spaced apart from the printed circuit board 34.

[0026] When an operating force toward the printed circuit board 34 is input to the movable body 6, the abutment portion 821 of the mounting portion 82 is pushed by the abutment portion 62 and displaces in a direction approaching the printed circuit board 34 while deforming the support wall portion 822. The abutment portion 821 displaces toward the printed circuit board 34 to a position where the stopper portion 823 contacts the printed circuit board 34. Contacts are provided at the opposing portions of the abutment portion 821 and the printed circuit board 34, and when the abutment portion 821 contacts the printed circuit board 34, the switch 5A is turned on. When the operating force acting on the movable body 6 is released, the restoring force of the support wall portion 822 displaces the mounting portion 82 in a direction away from the printed circuit board 34 . The support wall portion 822 applies a biasing force to the movable body 6 in a direction that returns the movable body 6 placed on the placement portion 82 to its initial position before displacement.

[0027] In this embodiment, the movable body 6, which displaces in the direction of the axis Z1 in response to the operation of the operated part 51, is placed on the mounting parts 82, 82, so that the user can feel the operation sensation (reaction force) when pressing the operated part 51.

[0028] 6 is a cross-sectional view of the switch device 1. FIG. 6 is a cross-sectional view of the switch 5A taken along line AA in FIG. Fig. 7 is a diagram illustrating a light guide 9A. Fig. 7(A) is a perspective view of the light guide 9A. Fig. 7(B) is a cross-sectional view of the light guide 9A taken along plane A in Fig. 7(A). Fig. 7(C) is a cross-sectional view of the light guide 9A taken along plane B in Fig. 7(A). Fig. 7(D) is a plan view of the light guide 9A as viewed from the direction of arrow CC in Fig. 7(B). Fig. 8 is a diagram illustrating the positional relationship between the light guide 9A and the light sources 35 and 36. Fig. 8(A) is an enlarged view of region A in Fig. 3. Fig. 8(B) is a cross-sectional view taken along line BB in Fig. 8(A). Note that Fig. 8(B) does not illustrate the cover member 8.

[0029] As shown in FIG. 3, the light guide 9A of the switch 5A is provided inside the movable body 6 along the axis Z1. 8(B), the light guide 9A has a substantially rectangular shape when viewed from below. The light guide 9A is provided with its long side surfaces 91, 91 oriented along the arrangement direction of the light sources 35, 36 (X direction). As shown in Figure 7 (B), the lower end of the light guide 9A is a light receiving surface 94 (incident surface) for light irradiated from the light sources 35 and 36, and the upper end is an emission surface 93 (exit surface) for light that enters the inside of the light guide 9A from the light receiving surface 94. As shown in FIG. 7C, the side surfaces 91, 91 of the light guide 9A are inclined in such a way that they approach each other from the light emitting surface 93 toward the light receiving surface 94. The thickness D90 of the light guide 9A in a direction perpendicular to the side surface 91 becomes thinner toward the light receiving surface 94 side. 7(B), the side surfaces 92, 92 of the light guide 9A are composed of a first side surface 921 parallel to the center line C9 and a second side surface 922 inclined toward each other toward the light receiving surface 94. The first side surface 921 is located on the light emitting surface 93 side. The second side surface 922 is located on the light receiving surface 94 side. The thickness W90 of the light guide 9A along the side surface 91 varies across a boundary 920 between a first side surface 921 and a second side surface 922. In a cross-sectional view along the second side surface 922, the thickness W90 of the second side surface 922 decreases toward the light receiving surface 94.

[0030] 7A and 7D, the light guide 9A has locking pieces 97, 97, and 98 provided on the side surfaces 92, 92 facing the light-emitting surface 93. As shown in Fig. 7D, the locking pieces 97, 97 extend in directions away from each other from one side surface 92a. The locking piece 98 extends parallel to the locking piece 97 from the other side surface 92b.

[0031] As shown in FIG. 6, the light guide 9A is provided in a state in which the locking pieces 97, 97, 98 are locked to the engagement portions 213, 213, 213 provided on the peripheral wall portion 21 of the case 2. The peripheral wall portion 21 is formed in a cylindrical shape by a pair of first wall portions 211, 211 and second wall portions 212, 212 connecting the ends of the first wall portions 211, 211. The peripheral wall portion 21 has a substantially rectangular outer shape in a cross-sectional view.

[0032] In the drawing, one second wall portion 212 located on the left side is provided with two engagement portions 213, 213 spaced apart in the longitudinal direction (X direction) of the second wall portion 212. In the drawing, the other second wall portion 212 located on the right side is provided with one engagement portion 213. These engagement portions 213 protrude from the inner periphery of the second wall portion 212. The engagement portion 213 is provided with a recess 213a with an opening facing inward. The locking pieces 97, 98 of the light guide 9A are engaged from the Z direction with the two engaging portions 213, 213 of one second wall portion 212. The locking piece 97 of the light guide 9A is engaged from the Z direction with the one engaging portion 213 of the other second wall portion 212. In this state, the light guide 9A is positioned by the peripheral wall portion 21 in a state where the relative displacement with respect to the peripheral wall portion 21 is restricted.

[0033] Guide grooves 214, 214 are provided in the center of the longitudinal direction (Y direction) on the inner periphery of the first wall portions 211, 211. On the other hand, a guide groove 215 is provided in the center of the longitudinal direction (X direction) on the inner periphery of the second wall portion 212. These guide grooves 214, 214, 215 are formed with a predetermined range in the Z direction.

[0034] The peripheral wall 61 of the movable body 6 is located inside the peripheral wall 21. Guides 616, 616, 617 on the movable body 6 side are engaged with the guide grooves 214, 214 from the Z direction. In this state, the movable body 6 is allowed to move in the Z direction relative to the peripheral wall 21. When the movable body 6 moves in the Z direction in conjunction with the pressing operation of the operated portion 51 of the switch 5A, the displacement of the movable body 6 in the Z direction is guided by the guides 616, 616, 617 engaged with the guide grooves 214, 214, 215.

[0035] The peripheral wall 61 of the movable body 6 is formed in a cylindrical shape from a pair of first walls 611, 611 and second walls 612, 612 connecting the ends of the first walls 611, 611. The peripheral wall 61 has a substantially rectangular outer shape in cross section. When viewed from the Z direction, the peripheral wall 61 has cutouts 65 at positions overlapping the engagement portions 213. When viewed from the Z direction, the locking pieces 97 of the light guide 9A are engaged with the engagement portions 213 at positions overlapping the cutouts 65.

[0036] As shown in FIG. 7B, the light-emitting surface 93 of the light guide 9A is formed in a concave shape recessed downward toward the light-receiving surface 94. In a cross-sectional view, the light-emitting surface 93 is preferably formed in an arc shape with a vertex P facing downward. The vertex P of the arc-shaped light-emitting surface 93 is positioned on the center line C9 of the light guide 9A. The shape of the light-emitting surface 93 is not limited to an arc shape. For example, it may be a V-shape with a vertex facing downward.

[0037] 8A, the light receiving surface 94 is configured with two recesses 95 and 96 recessed toward the light emitting surface 93. The recesses 95 and 96 are aligned in the direction in which the light sources 35 and 36 are aligned (X direction).

[0038] The recess 95 is disposed opposite the light source 35. The recess 95 has a pair of inclined surfaces 951, 951. The distance d between the pair of inclined surfaces 951, 951 and the light emitting surface 35a of the light source 35 changes continuously in the arrangement direction (X direction) of the light sources 35, 36. As shown in FIG. 8B, when viewed from the opposing direction of the light guide 9A and the light source 35 (Z direction), the pair of inclined surfaces 951, 951 are adjacent to each other in the arrangement direction of the light sources 35, 36 (X direction). The light guide 9A is positioned so that the boundary line Ca between the pair of inclined surfaces 951, 951 overlaps with the light emitting surface 35a of the light source 35, more preferably intersects with the center C35 of the light emitting surface 35a.

[0039] In this state, when viewed from the opposing direction of the light guide 9A and the light source 35 (Z direction), the light source 35 is provided in a positional relationship where it completely overlaps with the recess 95. Here, the boundary line Ca between the inclined surfaces 951, 951 is perpendicular to the line X1. The line X1 is a line that runs along the arrangement direction (X direction) of the light sources 35, 36 and passes through the centers C35, C36 of the light sources 35, 36. In the recess 95, the distance d from the light emitting surface 35a of the light source 35 is greatest at the boundary line Ca. The inclined surfaces 951, 951 are inclined such that the distance d from the light emitting surface 35a decreases as the distance from the boundary line Ca increases in the arrangement direction (X direction) of the light sources 35, 36.

[0040] The recess 96 is disposed opposite the light source 36. The recess 96 has a pair of inclined surfaces 961, 961. The distance d between the pair of inclined surfaces 961, 961 and the light emitting surface 36a of the light source 36 changes continuously in the arrangement direction (X direction) of the light sources 35, 36. As shown in FIG. 8B, when viewed from the opposing direction of the light guide 9A and the light source 36 (Z direction), the pair of inclined surfaces 961, 961 are adjacent to each other in the arrangement direction of the light sources 35, 36 (X direction). The light guide 9A is positioned so that the boundary line Cb between the pair of inclined surfaces 961, 961 overlaps with the light emitting surface 36a of the light source 36, more preferably intersects with the center C36 of the light emitting surface 36a.

[0041] In this state, when viewed from the opposing direction of the light guide 9A and the light source 36 (Z direction), the light source 36 is provided in a positional relationship where it completely overlaps with the recess 96. Here, a boundary line Cb between the inclined surfaces 961, 961 is perpendicular to the straight line X1. In the recess 96, the distance d between the boundary line Cb and the light-emitting surface 36a of the light source 36 is maximum. The inclined surfaces 961, 961 are inclined such that the distance d between the boundary line Cb and the light-emitting surface 36a decreases as the distance increases from the boundary line Cb in the arrangement direction (X direction) of the light sources 35, 36.

[0042] 8B, a boundary line Cx between the inclined surface 951 on the recess 95 side and the inclined surface 961 on the recess 96 side is located closer to the light source 35 than a straight line C9 passing through the center of the light receiving surface 94 in the arrangement direction (X direction) of the light sources 35, 36. In the light receiving surface 94, the surface facing the light sources 35, 36 has a pointed uneven surface that continues in the arrangement direction (X direction) of the light sources 35, 36. Therefore, in this embodiment, the surface facing the light sources 35, 36 in the light receiving surface 94 does not have a flat surface parallel to the light emitting surfaces 35a, 36a of the light sources 35, 36, but the shape of the light receiving surface is not limited to this. A flat surface may be provided between the recess 95 and the recess 96 depending on the area of ​​the light sources 35, 36, etc.

[0043] Here, when light source 35 emits white light and light source 36 emits orange light, it is preferable that at least a partial area of ​​inclined surfaces 961, 961 is subjected to a light diffusion treatment such as a graining process. When two light sources of different colors are arranged side by side, it is necessary to match the brightness required for each light source with the brightness of the light actually emitted from each light source. As described above, by applying a light diffusion treatment to the inclined surfaces 961, 961 of the recess facing the light source whose brightness is to be reduced, it is possible to easily adjust the brightness ultimately required for each light source.

[0044] As shown in FIG. 1, light guides 9B and 9C have the same basic configuration as light guide 9A, except that the arrangement of the locking pieces is different. That is, the light guides 9B and 9C have two recesses 95 and 96 aligned in the alignment direction of the light sources 35 and 36 on the light receiving surface 94, and are provided with a light emitting surface 93 that is recessed in a concave shape.

[0045] 9 is a cross-sectional view of the switch device 1. In FIG. 9, a cross section of the switch 5D portion of the switch device 1 taken along plane B in FIG. 2 is schematically shown. Fig. 10 is a cross-sectional view of the switch device 1. Fig. 9 schematically shows a cross section of the switch 5D portion of the switch device 1 taken along line BB in Fig. 9.

[0046] In the switch 5D, the peripheral wall 61 on the movable body 6 side is also located inside the cylindrical peripheral wall 21 on the case 2 side. Engagement portions 213 protruding from the inner periphery of the peripheral wall 21 are engaged with locking pieces 97, 97, 98 on the light guide 9D side at positions overlapping with notches 65 provided in the peripheral wall 61.

[0047] Fig. 11 is a diagram illustrating a light guide 9D. Fig. 11(A) is a perspective view of the light guide 9D. Fig. 11(B) is a cross-sectional view of the light guide 9D taken along plane A in Fig. 11(A). Fig. 11(C) is a cross-sectional view of the light guide 9D taken along plane B in Fig. 11(A). Fig. 11(D) is a plan view of the light guide 9D as viewed from the direction of arrow CC in Fig. 11(B). Fig. 12 is a diagram illustrating the positional relationship between the light guide 9D and the light sources 35 and 36. Fig. 12(A) is an enlarged view of region A in Fig. 9. Fig. 12(B) is a cross-sectional view taken along line AA in Fig. 12(A). Note that in Fig. 12(B), the cover member 8 is not shown.

[0048] As shown in FIG. 9, a switch 5D has a light guide 9D provided therein that has a different shape from the light guide 9A described above. The light guide 9D of the switch 5D is provided along the axis Z2 inside the movable body 6. Here, the axis Z2 is a straight line that is perpendicular to the upper surface 34a of the printed circuit board 34 and that is aligned with the displacement direction of the movable body 6.

[0049] As shown in FIG. 9, the light guide 9D of the switch 5A is provided inside the movable body 6 along the axis Z2. 12(B), the light guide 9D has a substantially rectangular shape when viewed from below. The light guide 9D is provided with its long side surfaces 91, 91 oriented along the arrangement direction of the light sources 35, 36 (Y direction). As shown in FIG. 11B, the lower end of light guide 9D is light receiving surface 94 for light emitted from light sources 35 and 36, and the upper end is light emitting surface 93 for light that enters light guide 9D from light receiving surface 94. As shown in FIG. 11(B), side surfaces 92, 92 of a light guide 9D are inclined in such a way that they approach each other from a light-emitting surface 93 toward a light-receiving surface 94. As shown in FIG. The light guide 9D has a width W90 along the side surface 91 that becomes thinner toward the light receiving surface 94 side. 11(C), the side surfaces 91, 91 of the light guide 9D are composed of a first side surface 911 parallel to the center line C9 and a second side surface 912 inclined toward each other toward the light receiving surface 94. The first side surface 911 is located on the light emitting surface 93 side. The second side surface 912 is located on the light receiving surface 94 side. The thickness D90 of the light guide 9D in a direction perpendicular to the side surface 91 varies across a boundary 910 between the first side surface 911 and the second side surface 912. In a cross-sectional view along the side surface 91, the thickness D90 of the second side surface 912 decreases toward the light receiving surface 94.

[0050] 11A and 11D, light guide 9D has locking pieces 97, 97, and 98 provided on side surfaces 91, 91 facing light-emitting surface 93. As shown in Fig. 11D, locking pieces 97, 97 extend in directions away from one side surface 91a. Locking piece 98 extends parallel to locking piece 97 from the other side surface 91b.

[0051] As shown in FIG. 10, the light guide 9D is provided in a state in which the locking pieces 97, 97, 98 are locked to the engagement portions 213, 213, 213 provided on the peripheral wall portion 21 of the case 2. In the peripheral wall portion 21, one second wall portion 212 located on the left side in the drawing is provided with one engagement portion 213. In the other second wall portion 212 located on the right side in the drawing, two engagement portions 213, 213 are provided at an interval in the longitudinal direction (X direction) of the second wall portion 212. These engaging portions 213 protrude from the inner periphery of the second wall portion 212. The engaging portions 213 are provided with recesses 213a whose openings face inward. The locking pieces 97, 98 of the light guide 9D are engaged from the Z direction with the two engaging portions 213, 213 of the other second wall portion 212. The locking piece 97 of the light guide 9D is engaged from the Z direction with one engaging portion 213 of one second wall portion 212. In this state, the light guide 9D is positioned by the peripheral wall portion 21 in a state where the relative displacement with respect to the peripheral wall portion 21 is restricted.

[0052] The peripheral wall 61 of the movable body 6 is located inside the peripheral wall 21. Guides 616, 616, 617 on the movable body 6 side are engaged with the guide grooves 214, 214 from the Z direction. In this state, the movable body 6 is allowed to move in the Z direction relative to the peripheral wall 21. When the movable body 6 moves in the Z direction in conjunction with the pressing operation of the operated portion 51 of the switch 5D, the displacement of the movable body 6 in the Z direction is guided by the guides 616, 616, 617 engaged with the guide grooves 214, 214, 215.

[0053] The peripheral wall 61 of the movable body 6 is formed in a cylindrical shape from a pair of first walls 611, 611 and second walls 612, 612 connecting the ends of the first walls 611, 611. The peripheral wall 61 has a substantially rectangular outer shape in cross section. When viewed from the Z direction, the peripheral wall 61 has cutouts 65 at positions overlapping the engagement portions 213. When viewed from the Z direction, the locking pieces 97 of the light guide 9A are engaged with the engagement portions 213 at positions overlapping the cutouts 65.

[0054] 11(B), the light emitting surface 93 of the light guide 9D is a flat surface perpendicular to the center line C9. The light receiving surface 94 of the light guide 9D is formed in a protruding shape that protrudes in a direction away from the light emitting surface 93. The light receiving surface 94 is made up of a pair of inclined surfaces 941 and 942. As shown in Fig. 12(A), the pair of inclined surfaces 941 and 942 are adjacent to each other in the arrangement direction of the light sources 35 and 36 (Y direction).

[0055] The inclined surface 941 is disposed opposite the light source 35. The distance d between the inclined surface 941 and the light emitting surface 35a of the light source 35 changes continuously in the arrangement direction (Y direction) of the light sources 35, 36. Specifically, the inclined surface 941 is inclined in a direction such that the distance d becomes smaller toward the adjacent inclined surface 942 side (the right side in the figure). The inclined surface 942 is disposed opposite the light source 36. The distance d between the inclined surface 942 and the light emitting surface 36a of the light source 36 changes continuously in the arrangement direction (Y direction) of the light sources 35, 36. Specifically, the inclined surface 942 is inclined in a direction such that the distance d becomes smaller toward the adjacent inclined surface 941 side (left side in the figure).

[0056] The light guide 9D is positioned such that the boundary line Cx between the inclined surfaces 941 and 942 is located between the light source 35 and the light source 36 when viewed from the opposing direction of the light guide 9D and the light sources 35 and 36 (Z direction). In this state, it is preferable that the light guide 9D is positioned so that the center C35 of the light-emitting surface 35a approximately coincides with the Y-direction center line C941 of the inclined surface 941, and the center C36 of the light-emitting surface 36a approximately coincides with the Y-direction center line C942 of the inclined surface 942.

[0057] 12A, the light emitted from the light sources 35 and 36 moves from the centers C35 and C36 of the light-emitting surfaces 35a and 36a in a direction perpendicular to the light-emitting surfaces 35a and 36a (the direction of the center line indicated by the reference line V in the figure). At this time, the light emitted from the light sources 35 and 36 moves along the reference line V and diffuses to the surroundings. When light guide 9D is positioned as described above, light emitted from light source 35 enters light guide 9A from inclined surface 941, and light emitted from light source 36 enters light guide 9A from inclined surface 942.

[0058] Here, when light source 35 emits white light and light source 36 emits orange light, it is preferable that inclined surface 961 on the light source 36 side be subjected to a light diffusion treatment such as a graining process. When two light sources of different colors are placed side by side, the brightness of the light emitted from the light sources will be different. Therefore, by applying a light diffusion treatment to the inclined surface 941 onto which the brighter light is incident, as described above, it is possible to reduce the variation in the brightness of the light finally emitted from the light guide 9D.

[0059] The functions of the light guides 9A and 9D will be described below. 13 and 14 are diagrams for explaining the function of the light guide. FIG. 13A shows the travel paths of incident light in light guide 9A, including the travel paths of light emitted from light source 35 and the travel paths of light emitted from light source 36. FIG. 13B shows the travel path of incident light in light guide 9D, including the travel path of light emitted from light source 35 and the travel path of light emitted from light source 36. Fig. 14A shows the travel path of incident light in the case of light guide 9X, whose light receiving surface 94' is a flat surface, and Fig. 14B shows the travel path of incident light in the case of light guide 9A.

[0060] As shown in FIG. 3, when the operated portion 51 of the switch 5A is pressed, the movable body 6 is displaced downward toward the printed circuit board 34 in conjunction with the displacement of the operated portion 51. Then, the mounting portion 82 of the cover member 8 is pressed by the contact portion 62 of the movable body 6 and comes into contact with the upper surface 34a of the printed circuit board 34. This turns on the switch 5A, and light is emitted from one of the light sources 35, 36 upward toward the light guide 9A side.

[0061] [Light guide 9A] 8, in the case of the switch 5A, the recess 95 of the light guide 9A is located above the light source 35. When viewed from the opposing direction (Z direction) of the light guide 9A and the light source 35, the pair of inclined surfaces 951, 951 are adjacent to each other in the arrangement direction (X direction) of the light sources 35, 36. The light guide 9A is positioned so that the boundary line Ca between the pair of inclined surfaces 951, 951 overlaps with the light emitting surface 35a of the light source 35, more preferably intersects with the center C35 of the light emitting surface 35a.

[0062] Here, the light emitted from the light source 35 moves from the center of the light-emitting surface 35a in a direction perpendicular to the light-emitting surface 35a (the direction of the reference line V in the figure) (see FIG. 8(A)). At this time, the light emitted from the light source 35 moves along the reference line V and diffuses to the surroundings. The pair of inclined surfaces 951, 951 are provided in a symmetrical positional relationship with the boundary line Ca therebetween, and the inclined surfaces 951, 951 are provided so as to cross the direction of movement of light emitted from the light source 35. Therefore, substantially all of the light emitted from the light source 35 enters the light guide 9A from the inclined surfaces 951, 951 of the recess 95.

[0063] Similarly, when light is emitted from the light source 36 of the switch 5A, the recess 96 of the light guide 9A is located above the light source 36. When viewed from the opposing direction (Z direction) of the light guide 9A and the light source 36, the pair of inclined surfaces 961, 961 are adjacent to each other in the arrangement direction (X direction) of the light sources 35, 36 (see FIG. 8A). The light guide 9A is positioned so that the boundary line Cb between the pair of inclined surfaces 961, 961 overlaps with the light emitting surface 36a of the light source 36, more preferably intersects with the center C36 of the light emitting surface 36a.

[0064] Therefore, since the pair of inclined surfaces 961, 961 are arranged so as to cross the direction of movement of the light emitted from the light source 36, almost all of the light emitted from the light source 36 enters the light guide 9A from the inclined surfaces 961, 961 of the recess 96.

[0065] As shown in FIG. 13(A) and FIG. 14(B), light entering light guide 9A through recesses 95 and 96 travels upward to where light emitting surface 93 is located while being reflected inside light guide 9A. Here, in the light guide 9A, the direction of movement of incident light is diffused inside the light guide 9A by adjusting the inclination angles of the inclined surfaces 961 and 962 with respect to the light emitting surfaces 35a and 36a of the light sources 35 and 36. Therefore, the direction of movement of the emitted light is controlled while suppressing polarization of the light emitted from the light emitting surface 93 of the light guide 9A.

[0066] Furthermore, the light-emitting surface 93 is formed in a curved shape that curves in a direction away from the illumination area 515, and is recessed toward the light-receiving surface 94. Therefore, the light that is diffused inside the light guide 9A is concentrated when passing through the light-emitting surface 93, and the illumination area 515 of the operated unit 51 can be illuminated with high brightness. Therefore, in operated portion 51 of switch 5A, brightness can be ensured while suppressing variations in brightness in illuminated portion 515 illuminated by light from light guide 9A. Even in the switches 5B and 5C having the light guides 9B and 9C having the same basic configuration as the light guide 9A, the brightness can be ensured while suppressing variations in brightness in the illuminated portion 515.

[0067] On the other hand, as shown in Fig. 14A, in the case of a light guide 9X in which the light receiving surface 94' is a flat surface, the light sources 35 and 36 are arranged side by side, so that the light incident on the light guide 9X is biased to one side in the width direction. In the case of Fig. 14A, of the light emitted from the center of the light source 35, the light that diffuses to the region to the right of the reference line V can be diffused inside the light guide 9X. On the other hand, the light that diffuses to the region to the left of the reference line V is biased to the left side of the light guide 9X. This is because the light source 35 is located closer to the second side surface 922, and in the region to the left of the reference line V, the light that enters the light guide 9A is reflected by the side surface 92 before being sufficiently diffused. Therefore, the light is concentrated in the region to the left of the light-emitting surface 93, resulting in uneven brightness in the illuminated area 515. As a result, the light reflected within the light guide 9X is also biased to one side, which results in a bias in the light emitted from the light-emitting surface 93. As a result, a brightness bias occurs in the illumination area 515 illuminated by the light-emitting surface 93 of the light guide 9X.

[0068] 14(b), in the light guide 9A, the inclined surfaces 951, 951 diffuse the incident light, and in the region to the left of the reference line V, the light is reflected at a position closer to the light receiving surface 94. This effectively prevents the light from concentrating in the region to the left of the reference line V, and reduces unevenness in the brightness of the illuminated area 515.

[0069] Even when the light source that emits light is the light source 36, the provision of the inclined surfaces 961, 961 suitably prevents the light from concentrating in the area to the right of the reference line V. This makes it possible to reduce unevenness in the brightness of the illuminated area 515.

[0070] [Light guide 9D] 13(B), light guide 9D is wider than light guide 9A in the direction along side surface 91, and the width increases from light receiving surface 94 toward light emitting surface 93. Therefore, light guide 9D has a wider light emitting surface 93 than light guide 9A.

[0071] Light guide 9D shows an example in which light emitting surface 93 remains flat, and light receiving surface 94, which is made up of a pair of inclined surfaces 941, 942, is formed in a pointed shape that protrudes toward light sources 35, 36. That is, in the light guide 9D, the inclined surfaces 951, 951 simply diffuse the incident light, and the light is diffused within the light guide 9D before it reaches the light emitting surface 93. Therefore, the light guide 9D reduces the processing costs of providing a recess on the light receiving surface while effectively preventing light from concentrating in an area on one side of the reference line V, thereby reducing unevenness in the brightness of the illuminated area 515. If the width of the light guide 9D can be secured in the direction in which the light sources 35 and 36 are arranged and unevenness in the brightness of the illuminated area 515 can be reduced, the light receiving surface 94 of the light guide 9D can also be made flat, further reducing processing costs.

[0072] As described above, the switch device 1 according to this embodiment has the light emitting device 11 configured as follows. (1) The light emitting device 11 is At least two light sources 35, 36 aligned in a first direction; and a light guide 9 disposed opposite the light sources 35 and 36. When viewed from the opposing direction of the light sources 35, 36 and the light guide 9 (Z direction), the light receiving surface 94 of the light guide 9 overlaps with the light emitting surfaces 35a, 36a of the light sources 35, 36. When viewed from the opposing direction (Z direction), recesses 95 and 96 are provided on the light receiving surface 94 in areas facing the light emitting surfaces 35a and 36a of the light sources 35 and 36. The recesses 95, 96 are provided in a one-to-one correspondence with the light sources 35, 36, and are arranged side by side in the arrangement direction of the light sources 35, 36 (first direction).

[0073] With this configuration, when viewed from the opposing direction (Z direction), the light sources 35 and 36 are arranged in a positional relationship where they overlap with the recesses 95 and 96 on the light-receiving surface 94 side, respectively. Therefore, light emitted from the light sources 35 and 36 enters the inside of the light guide 9A through the recesses 95 and 96 that are provided in a one-to-one correspondence with the light sources 35 and 36. By adjusting the shapes of the recesses 95 and 96, the traveling direction of the incident light can be adjusted, thereby suppressing bias in the light before it reaches the light-emitting surface 93 of the light guide 9A. This allows the traveling direction of the light emitted from the light-emitting surface 93 to be controlled, thereby suppressing variations in brightness in the area illuminated by the emitted light (illumination area 515). Furthermore, since the recesses 95, 96 are provided in a one-to-one correspondence with the light sources 35, 36, by adjusting the shape of each recess 95, 96 so that the light moves in the optimal direction for each light source 35, 36, it is expected that the variation in brightness can be further suppressed.

[0074] (2) The recesses 95, 96 have a pair of inclined surfaces 951, 951, 961, 961 whose distance d from the light sources 35, 36 changes continuously in the arrangement direction of the light sources 35, 36 (first direction). The pair of inclined surfaces 951, 951 are connected to each other at a position that overlaps with the light emitting surface 35a of the light source 35 when viewed from the opposing direction. The pair of inclined surfaces 961, 961 are connected to each other at a position that overlaps with the light emitting surface 36a of the light source 36 when viewed from the opposing direction. When viewed from the opposing direction, a boundary line Ca occurring at the connection point of a pair of inclined surfaces 951, 951 and a boundary line Cb occurring at the connection point of a pair of inclined surfaces 961, 961 are perpendicular to the arrangement direction of the light sources 35, 36 and have a maximum distance d from the light sources 35, 36.

[0075] With this configuration, for example, the moving direction of incident light can be adjusted by adjusting the inclination angle of the inclined surfaces 951, 961 relative to the light-emitting surfaces 35a, 36a of the light sources 35, 36, and therefore the moving direction of light emitted from the light-emitting surface 93 of the light guide 9 (light guide 9A in the case of the switch 5A) can be controlled. This makes it possible to suppress variations in brightness in the area illuminated by the emitted light (illuminated area 515).

[0076] (3) When viewed from the opposing direction, the boundaries Ca and Cb intersect with the central portions (centers C35 and C36: see FIG. 8B) of the light emitting surfaces 35a and 36a of the light sources 35 and 36 in the arrangement direction (first direction) of the light sources 35 and 36.

[0077] The light emitted from the light sources 35, 36 moves not only in a direction perpendicular to the light-emitting surfaces 35a, 36a (direction of reference line V: see FIG. 8A), i.e., in the direction in which the light sources 35, 36 face the light guide 9, but also in a direction inclined toward the light-emitting direction. Therefore, when viewed from the direction in which the light sources 35, 36 face the light guide 9, the area of ​​the irradiated light spreads outward as it moves away from the light-emitting surfaces 35a, 36a. With the above configuration, light diffusing from the center of the light emitting surfaces 35a, 36a of the light sources 35, 36 and diffusing around the reference line V can be appropriately received by the pair of inclined surfaces 951, 951, 961, 961 of the recesses 95, 96. This increases the amount of light emitted from light sources 35 and 36 that enters light guide 9, thereby increasing the amount of light that exits light guide 9, and therefore, improvement in brightness at illuminated portion 515 can be expected.

[0078] (4) In the recess 95 on one side in the arrangement direction (first direction) of the light sources 35 and 36, the inclined surface 951 located on the other side in the arrangement direction (the inclined surface 951 on the right side in (A) of FIG. 8) is The recess 96 on the other side in the arrangement direction (first direction) is connected to the inclined surface 961 (the inclined surface 961 on the left side in FIG. 8A) located on one side in the arrangement direction (first direction).

[0079] With this configuration, the light receiving surface 94 is formed into an uneven shape in which the distance from the light sources 35, 36 changes continuously in the arrangement direction (first direction) of the light sources 35, 36. This allows the areas of the inclined surfaces 951, 961 to be larger than when the entire light receiving surface 94 is a flat surface, thereby ensuring the amount of light received from the light sources 35, 36. Furthermore, if a flat surface parallel to the light-emitting surfaces 35a, 36a of the light sources 35, 36 remains at the boundary between the recess 95 on one side in the arrangement direction and the recess 96 on the other side, it would be difficult to control the direction of movement of light incident from this flat surface. By positioning only the inclined surfaces 951, 961 constituting the recesses 95, 96 at the portions of the light guide 9 facing the light sources 35, 36, most of the light emitted from the light sources 35, 36 can be made to enter the light guide 9, making it possible to emit the incident light in the desired direction while making it less likely to be biased.

[0080] (5) It has an operated portion 51 (operator) having an illumination portion 515. The light emitting surface 93 of the light guide 9 is disposed opposite the illumination portion 515 . In a cross-sectional view along the opposing direction of the light emitting surface 93 of the light guide 9 and the illumination portion 515, the light emitting surface 93 of the light guide 9 has a curved shape that curves in a direction away from the illumination portion 515.

[0081] With this configuration, the light emitted from the light emitting surface 93 of the light guide 9 can be collected at the illumination portion 515, so that the brightness of the illumination portion 515 can be ensured.

[0082] (6) The light sources 35 and 36 are two light sources that are aligned in the alignment direction of the light sources 35 and 36 (first direction) and emit light of different colors.

[0083] With this configuration, it is possible to change the color of the light irradiated onto the illumination area 515, which is expected to improve the lighting effect at the illumination area 515. As a result, even if two light sources with different brightness, area, and placement positions are provided for one illumination area 515, it is possible to suppress variations in brightness at the illumination area 515.

[0084] (7) In the recess 96 facing one of the two light sources 35 and 36, a light diffusion treatment is applied to at least a portion of the surface.

[0085] For example, if the inclined surface is subjected to a light diffusion treatment such as a texturing process, the amount of light incident on the light guide can be adjusted. When two light sources of different colors are placed side by side, it is necessary to match the brightness required for each light source with the brightness of the light actually emitted from each light source. By configuring as described above, it is possible to easily adjust the brightness required for each light source.

[0086] The present invention can also be specified as a switch device 1. (8) The switch device 1 is an operated portion 51 (operator) of the switch 5 (5A to 5D); and a light emitting device 11 that illuminates an illumination portion 515 of the operated portion 51. The operated unit 51 operated by the user is Different functions are assigned to operated portion 51 (first operator) of switch 5A and operated portion 51 (second operator) of switch 5D when operated. The illuminated portion 515 of the operated portion 51 (first operator) of the switch 5D has a larger area than the illuminated portion 515 of the operated portion 51 of the switch 5A. The light emitting device 11 is Two light sources 35, 36 arranged side by side; a light guide 9 disposed opposite two light sources 35 and 36; The light emitting devices 11 are provided in a one-to-one correspondence with the operated portions 51 . In the light-emitting device 11 of the switch 5A, The light guide 9A has recesses 95, 96 formed of a pair of inclined surfaces 951, 951, 961, 962 on the surface facing the light sources 35, 36, such that the distance d from the light sources 35, 36 changes continuously in the arrangement direction of the light sources 35, 36. The recesses 95, 96 are arranged one-to-one with the light sources 35, 36 and are aligned in the arrangement direction of the light sources 35, 36 (first direction: X direction in Figure 8). In the light-emitting device 11 of the switch 5D, The surface of light guide 9D facing light sources 35 and 36 does not have the recesses similar to those of light guide 9A.

[0087] With this configuration, when the area of ​​the illuminated portion 515 of the switch 5A is small, the light emitted from the light sources 35 and 36 enters the light guide 9A through the recesses 95 and 96 that are provided one-to-one with the light sources 35 and 36. By adjusting the shapes of the recesses 95 and 96, the direction of movement of the incident light can be adjusted, and therefore the direction of movement of the light emitted from the light-emitting surface 93 of the light guide 9A can be controlled. This makes it possible to reduce variations in brightness in the area illuminated by the emitted light. Furthermore, in the case of the operated portion 51 of the switch 5D in which the area of ​​the illuminated portion 515 is larger than that of the switch 5A, by making the width of the light guide 9D wider, the variation in brightness in the illuminated portion can be reduced and the processing cost for providing the recess can be reduced.

[0088] In the above embodiment, an example in which two light sources are arranged side by side has been described, but the number of light sources may be three or more. In this case, the light receiving surface of the light guide has recesses, the number of which is equal to the number of light sources, arranged continuously in the direction in which the light sources are arranged. For example, if three types of light sources, R (red), G (green), and B (blue), are used, the amount of light emitted from each light source can be adjusted to illuminate and decorate the illuminated area with the desired color.

[0089] Although the embodiments and modifications of the present invention have been described above, the present invention is not limited to these and can be modified as appropriate within the scope of the technical concept of the invention. [Explanation of symbols]

[0090] 1: Switch device 2: Case 211: 1st wall 212:Second wall part 213: Engagement part 3: Cover 5 (5A~5D): Switch 51: Operated part (operator) 510: Pressed part 515: Lighting area 6: Movable body 7: Magnetic sensor 8: Cover member 81: Base 82: Placement section 83: Storage unit 84: Light transmission area 9(9A~9D, 9X): Light guide 10: Magnet 11: Light-emitting device 34: Printed circuit board 35, 36: Light source 35a, 36b: light-emitting surface 91, 91a, 91b: Side 92, 92a, 92b: Side 93: Light-emitting surface 94: Light receiving surface 95: Recess 96: Recess 97, 98: Locking pieces 910, 920: Boundary points 911, 921: 1st side 912, 922: 2nd side 941, 942: Inclined surface 951, 952: Inclined surface 961, 962: Inclined surface C35, C36: Center C9: Center line Ca, Cb, Cx: Boundary Line d : distance

Claims

1. at least two light sources aligned in a first direction; a light guide disposed opposite the light source, When viewed from a direction in which the light source and the light guide face each other, a light receiving surface of the light guide overlaps with a light emitting surface of the light source, The light emitting device comprises: a first light emitting device that illuminates a first illumination portion; a second light-emitting device that illuminates a second illumination area that is larger in area than the first illumination area; In the first light-emitting device, a recessed portion formed of a pair of inclined surfaces whose distance from the light source changes continuously in the arrangement direction of the light sources is provided on a surface of the light guide facing the light source, and the recessed portions are provided in a one-to-one relationship with the light sources and are arranged side by side in the arrangement direction of the light sources, In the second light emitting device, the recess is not provided on the surface of the light guide facing the light source.

2. In claim 1, In the light guide of the first light emitting device, the pair of inclined surfaces are connected to each other at a position overlapping with the light emitting surface of the light source when viewed from the opposing direction, When viewed from the opposing direction, a boundary line formed at a connection portion of the pair of inclined surfaces is perpendicular to the first direction and is at a maximum distance from the light source.

3. In claim 2, the boundary line intersects with a center portion of the light-emitting surface of the light source in the first direction when viewed from the opposing direction.

4. In claim 2, The inclined surface located on the other side in the first direction of the recess on one side in the first direction is a recess on the other side in the first direction that is connected to an inclined surface located on one side in the first direction;

5. In claim 2, a light emitting surface of the light guide body facing an illumination portion that is the first illumination portion or the second illumination portion; In a cross-sectional view along a direction in which the light-emitting surface of the light guide and the illumination portion face each other, the light-emitting surface of the light guide has a curved shape that curves in a direction away from the illumination portion.

6. In any one of claims 1 to 5, The light source is two light sources that are aligned in the first direction and emit light of different colors.

7. In claim 6, The light emitting device, wherein a light diffusion treatment is applied to the surface of at least a partial region of the recess facing one of the two light sources.

8. An operator operated by a user; a light-emitting device that illuminates an illumination portion of the operation element, The operator is a first operator; and a second operator having an illumination portion with a larger area than that of the first operator; and each has a different function assigned to it. the light-emitting devices are provided in a one-to-one correspondence with the operation elements, The light emitting device comprises: Two light sources arranged side by side, a light guide disposed opposite the two light sources; In the light-emitting device for the first operator, The light guide has a surface facing the light source, and the distance from the light source is A recessed portion is provided which is made up of a pair of continuously changing inclined surfaces, and the recessed portion is The light sources are arranged in a one-to-one relationship with the light sources, and are arranged in the direction in which the light sources are arranged. In the light-emitting device for the second operator, A switch device in which the light guide has no recess on a surface facing the light source.

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