Vehicle sun visor
The vehicle sun visor integrates a light guide plate and mirror plate with a directly attached diffusion member to overcome light blockage and polarization issues, achieving uniform light emission and reduced glare.
Patent Information
- Application Number
- JP2020200331
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2020-12-02
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2040-12-02
AI Technical Summary
The existing vehicle sun visor designs with light guide plates and mirrors suffer from gaps that can trap debris, leading to potential light blockage or polarization by air or dust, affecting light emission direction and user visibility.
A vehicle sun visor design where the light guide plate and mirror plate are overlapped in thickness direction, with a diffusion member directly attached to the mirror plate to prevent gaps, ensuring light is diffused at a suitable angle without glare and maintaining user visibility.
The design prevents light blockage and polarization, ensuring uniform light emission at a suitable angle, reducing glare and enhancing user visibility while minimizing the number of parts and assembly steps.
Smart Images
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Abstract
Description
[Technical field]
[0001] The present invention relates to a sun visor for a vehicle having a mirror. [Background technology]
[0002] Patent Document 1 discloses lighting that is applied to automobile combination meters and the like. This lighting is equipped with a light source and a light guide plate, and the light guide plate has a reflective surface at its end. The light source is positioned so that only the half of the light that is on the light guide plate side from the optical axis is reflected by the reflective surface. The light reflected by the reflective surface travels inside the light guide plate, and is reflected and diffused by the textured surface at the bottom surface of the light guide plate.
[0003] Patent Document 2 discloses a lighting provided in a mirror unit of a sun visor for a vehicle. This lighting has an LED as a light source, and the LED is adjacent to the side edge of a light guide plate constituting the mirror. However, since the light guide plate is thin, it is not easy to place the LED adjacent to the side edge of the light guide plate. Therefore, it is considered to apply the lighting described in Patent Document 1 to the back side of the light guide plate. That is, a lighting light guide plate is arranged in parallel with the back side of the mirror light guide plate. The lighting light guide plate reflects and diffuses light with the textured surface of the bottom surface. The diffused light enters the light emitting area of the mirror light guide plate. [Prior art documents] [Patent documents]
[0004] [Patent Document 1] Patent No. 3838187 [Patent Document 2] JP 2011-183958 A Summary of the Invention [Problem to be solved by the invention]
[0005] However, there is a gap between the lighting light guide plate and the mirror light guide plate, which is an air layer. Dust can get into the gap. This raises concerns that the air or dust in the gap may block the light or polarize it in an undesired direction. Therefore, there has been a need for a vehicle sun visor that has a light source located on the back side of the mirror plate (light guide plate) that constitutes the mirror, and is configured to emit light from the light source at a suitable angle. [Means for solving the problem]
[0006] According to one feature of the present disclosure, a vehicle sun visor including a mirror and a light source has a plate-shaped visor body and a light source provided in the visor body. A light guide plate through which light from the light source can pass is disposed on the front side of the light source. One of the end faces of the light guide plate is a first emission surface that reflects light incident from the back side of the light guide plate into the light guide plate along the light guide plate. A second emission surface that reflects light passing along the light guide plate to the front side is formed on the back side of the light guide plate. A mirror plate is juxtaposed to the front side of the light guide plate. The mirror plate has a mirror area that covers the light source and the first emission surface of the light guide plate from the front side. A reflective film that constitutes a mirror is attached to the back side of the mirror area of the mirror plate. The mirror plate has a light emitting area that covers the second emission surface of the light guide plate from the front side. A diffusion member is directly and closely attached to the back side of the light emitting area of the mirror plate, and the diffusion member diffuses light from the light guide plate to the front side.
[0007] Therefore, the light guide plate and the mirror plate are stacked in the thickness direction. This results in a mirror and light emitting structure in a relatively thin structure. The diffusion member is directly and closely attached to the rear surface of the mirror plate. Therefore, no gap is formed between the diffusion member and the mirror plate. Therefore, the light that passes through the diffusion member is not blocked or polarized by the air in the gap or the dust that has entered the gap. As a result, the light emitted from the light emitting area of the mirror plate is diffused toward the user at a suitable angle. The light source and the first exit surface of the light guide plate are covered with a reflective film. Therefore, the light source and the first exit surface of the light guide plate are prevented from directly entering the user's field of vision. This makes it possible to prevent the user from feeling dazzled.
[0008] According to another feature of the present disclosure, the diffusion member is formed by an uneven shape formed on the back surface of the light-emitting area of the mirror plate. In other words, the diffusion member is not a separate member from the mirror plate, but is formed on the mirror plate itself. This allows the number of parts of the vehicle sun visor to be reduced. In addition, since the diffusion member is formed on the mirror plate itself, no gap is formed between the mirror plate and the diffusion member.
[0009] According to another feature of the present disclosure, the diffusing member has a smooth surface that directly contacts the back surface of the mirror plate, and a back surface that has an uneven shape to diffuse light. Therefore, when the smooth surface of the diffusing member is brought into close contact with the back surface of the mirror plate, the area of the contact portion between the mirror plate and the diffusing member becomes larger. This makes it possible to more reliably prevent gaps from being generated at the contact surface between the mirror plate and the diffusing member. Therefore, the light emitted from the light-emitting region of the mirror plate is diffused toward the user at a suitable angle. Moreover, the strength of the contact between the mirror plate and the diffusing member can be improved.
[0010] According to another feature of the present disclosure, a planar coloring member containing a coloring material is provided on the back surface of the diffusion member. Thus, the light from the light guide plate is colored by passing through the coloring member. This allows the color of the light emitted from the light emitting region of the mirror plate to be set as desired. The coloring member is located upstream of the diffusion member. Therefore, the coloring member can be made relatively small. For example, when the coloring member is disposed downstream of the diffusion member, it is necessary to enlarge the coloring member in consideration of the diffusion of light. Compared to such a structure, the coloring member can be made relatively small.
[0011] According to another feature of the present disclosure, the vehicle sun visor has a second diffusing member that directly contacts the back surface of the diffusing member of the mirror plate. The second diffusing member has a smooth surface that contacts the diffusing member and a back surface that has an uneven shape to diffuse light. Thus, the light from the light guide plate is diffused by the second diffusing member. The light emitted from the second diffusing member is further diffused by the diffusing member of the mirror plate. As a result, the light emitted from the light emitting area of the mirror plate is diffused toward the user at a wider angle. [Brief description of the drawings]
[0012] [Figure 1] FIG. 2 is a perspective view of a part of the interior of a vehicle and a sun visor attached to a vehicle ceiling. [Diagram 2] FIG. 4 is a perspective view of the sun visor with the lid of the mirror unit open. [Diagram 3] 3 is a cross-sectional view taken along line III-III in FIG. 2. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] 6 is a cross-sectional view taken along line VI-VI in FIG. 4. [Figure 7] FIG. 7 is a cross-sectional view taken along line VII-VII of FIG. [Figure 8] FIG. 8 is a partial enlarged view of VIII in FIG. [Figure 9] 7 is a cross-sectional view of a mirror plate and a diffusing member according to another embodiment, which corresponds to FIG. 6. [Figure 10] 7 is a cross-sectional view of a mirror plate and a diffusing member according to another embodiment, which corresponds to FIG. 6. [Figure 11] 7 is a cross-sectional view of a mirror plate according to another embodiment, which corresponds to FIG. 6. FIG. [Figure 12] FIG. 12 is a partially enlarged view of XII in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0013] One embodiment of the present invention will be described with reference to Figs. 1 to 8. As shown in Fig. 1, a vehicle sun visor 1 is attached to a ceiling surface 21 adjacent to the upper side of a windshield 20 inside a vehicle cabin. The vehicle sun visor 1 includes a plate-shaped visor body 10 and a mirror unit 2 provided on one side of the visor body 10. The visor body 10 includes a flat plate-shaped first shell 10a and a second shell 10b stacked in the thickness direction. A skin 10c is placed on the surface of the visor body 10 (see Fig. 7).
[0014] As shown in Fig. 1, a support shaft 11 and a support shaft 13 are attached to the visor body 10. The support shaft 11 is a substantially L-shaped rod having a horizontal shaft 11a and a vertical shaft 11b. The horizontal shaft 11a is long and linear, and is rotatably inserted into the upper side of the visor body 10. The vertical shaft 11b extends upward from the tip of the horizontal shaft 11a, substantially perpendicular to the horizontal shaft 11a. The tip of the vertical shaft 11b is rotatably attached to a bracket 12. The bracket 12 is attached to a ceiling surface 21 of the vehicle interior.
[0015] 1, the support shaft 13 is substantially cylindrical and is removably held by a hook 23 fixed to the ceiling surface 21. By attaching the support shaft 13 to the hook 23, the visor body 10 rotates about the support shaft 13 and the horizontal shaft 11a between a use position P along the windshield 20 and a storage position K along the ceiling surface 21. By removing the support shaft 13 from the hook 23, the visor body 10 becomes rotatable about the vertical shaft 11b. As a result, the visor body 10 rotates between the use position P along the windshield 20 and a side position S along the side glass 22.
[0016] 2 and 3, the mirror unit 2 has an openable and closable lid 2b. The following description will be given with the visor body 10 positioned at the use position P, and with the state as seen by the user defined as the top, bottom, left, right, front and back directions. On one side (front surface) of the visor body 10, a rectangular mirror housing section 10d is formed in which the first shell 10a is recessed toward the inside of the visor body 10 in the thickness direction. The mirror unit 2 is fitted into the mirror housing section 10d.
[0017] As shown in Fig. 4, the mirror unit 2 has a rectangular mirror frame 2a. A lid 2b is attached to the front side of the mirror frame 2a so as to be able to open and close. A mirror plate 3, a reflector 6, and a unit base 5 are attached, in that order, to the back side of the mirror frame 2a. A light source 4 is provided on the unit base 5. The mirror plate 3 can be covered by closing the lid 2b. A diffusion sheet 7 (diffusion member) is provided on the back side of the mirror plate 3, as shown in Fig. 5.
[0018] As shown in Fig. 4, the unit stand 5 has a base 5a, and a notch 5d is formed in the center of the base 5a. Substrates 5b are disposed on both the left and right sides of the base 5a. A plurality of light sources 4, for example, three light sources 4, are disposed on each substrate 5b. For example, an LED (light emitting diode) is used as the light source 4. A switch 5c for turning the power of the light source 4 on and off is disposed above the notch 5d.
[0019] As shown in Figures 4 and 8, a reflector 6 equipped with a light guide plate 6a is disposed on the unit base 5. The reflectors 6 are disposed on both the left and right sides of the base 5a, and cover the substrate 5b on which the light source 4 is mounted. The light guide plate 6a is rectangular and covers the substrate 5b. The surfaces of the light guide plate 6a other than the front surface are surrounded by the reflector 6. The reflector 6 has a reflecting plate 6d on the surface that contacts the rear surface of the light guide plate 6a.
[0020] As shown in Fig. 4, a flat, plate-like mirror plate 3 is provided in parallel on the front side of the light guide plate 6a. The mirror plate 3 is attached to the mirror frame 2a and covers the left and right reflectors 6. As a result, the left and right light guide plates 6a are covered by one mirror plate 3. The upper side of the lid 2b is rotatably attached to the mirror frame 2a. As a result, the lid 2b can be rotated upward as shown in Fig. 3 to expose the mirror plate 3.
[0021] The mirror plate 3 is, for example, a glass half mirror. As shown in Fig. 4, the mirror plate 3 has a mirror area 3a that acts as a mirror in the left-right center, and light-emitting areas 3b that act as illuminators on both the left and right sides. As shown in Figs. 7 and 8, the mirror area 3a covers the light source 4 and the first emission surface 6b of the light guide plate 6a from the front side. The light-emitting area 3b covers the second emission surface 6c of the light guide plate 6a from the front side. A silver film is attached to the back surface of the mirror area 3a as a reflective film 8 that constitutes the mirror.
[0022] The reflective film 8 is attached to the rear surface of the mirror plate 3 as shown in Fig. 5. Specifically, a silver film is attached by printing from the center to both left and right sides on the rear surface of the mirror plate 3, except for both left and right ends of the mirror plate 3. The portion of the mirror plate 3 where the silver film is attached becomes a mirror surface and reflects light incident from the front side of the mirror plate 3. In other words, it functions as a mirror area 3a.
[0023] As shown in Figs. 5 and 6, the diffusion sheet 7 is in direct contact with the back surface 3d of the light-emitting region 3b of the mirror plate 3. For example, the diffusion sheet 7 is attached to the mirror plate 3 by adhesive or double-sided adhesive tape. The diffusion sheet 7 has a smooth surface 7a and an uneven surface 7b. The smooth surface 7a is the front surface of the diffusion sheet 7 and is in direct contact with the back surface of the mirror plate 3. The uneven surface 7b is the back surface of the diffusion sheet 7 and has an uneven shape to diffuse light. The uneven shapes are arranged alternately in the left-right direction and extend in the up-down direction. The diffusion sheet 7 diffuses the light from the light guide plate 6a to the front side by changing the angle of the light to the front side. By adhering the back surface 3d of the light-emitting region 3b to the smooth surface 7a of the diffusion sheet 7, the formation of a gap between the mirror plate 3 and the diffusion sheet 7 is suppressed.
[0024] As shown in FIG. 8, the light guide plate 6a is formed from a material through which light from the light source 4 can pass. For example, acrylic resin is used. The light guide plate 6a has an end face at the center side of the unit base 5, and the end face has a first exit surface 6b on the back surface, which is inclined from the center in the left-right direction of the unit base 5 to the end side. The first exit surface 6b is inclined so as to face the base 5a of the unit base 5. The first exit surface 6b is arranged so as to overlap with the light beam of the light source 4. The first exit surface 6b reflects light that is incident into the light guide plate 6a from the back surface of the light guide plate 6a along the light guide plate 6a. The light guide plate 6a is patterned so that the light reflected by the first exit surface 6b is emitted from the front surface of the light guide plate 6a. The back surface of the light guide plate 6a is in contact with the reflector plate 6d of the reflector 6. The back surface of the light guide plate 6a is formed with a second exit surface 6c that reflects the light passing along the light guide plate 6a to the front side.
[0025] As shown in Fig. 3, the mirror unit 2 is provided with a switch 5c that is turned on when the lid 2b is opened and turned off when the lid 2b is closed. When the switch 5c is turned on, it electrically connects or disconnects the board 5b and the vehicle power supply. An electric wire from the vehicle power supply passes from the ceiling surface 21 through the support shaft 11 and the visor body 10 and is connected to the switch 5c and the board 5b. This supplies power to the light source 4, causing the light source 4 to emit light.
[0026] As shown in FIG. 8, the light emitted from the light source 4 enters the light guide plate 6a from the rear surface of the light guide plate 6a and is reflected by the first exit surface 6b. The reflected light from the first exit surface 6b travels through the light guide plate 6a while being reflected along the light guide plate 6a or directly. Since the light source 4 is disposed away from the light-emitting region 3b, the light emitted by the light source 4 and the reflected light from the first exit surface 6b are prevented from directly entering the user's field of vision. The light in the light guide plate 6a is reflected by the second exit surface 6c on the rear side of the light-emitting region 3b. The reflected light from the second exit surface 6c enters the light-emitting region 3b of the mirror plate 3 through the diffusion sheet 7.
[0027] 6, the light passing through the diffusion sheet 7 is diffused by the uneven surface 7b. Specifically, the light reflected from the second exit surface 6c of the light guide plate 6a is refracted and reflected by the uneven shape of the uneven surface 7b, and is diffused uniformly in multiple directions. As a result, the pattern of the reflected light from the second exit surface 6c is hidden from the user's perspective, and light is emitted with uniform brightness.
[0028] 6 and 8, the light diffused by the uneven surface 7b enters the light-emitting area 3b from the rear surface of the mirror plate 3 via the smooth surface 7a. The smooth surface 7a and the rear surface of the mirror plate 3 are in close contact with each other, and there is no or almost no air gap between them, so the diffused light is not polarized and is emitted at a suitable angle from the surface of the light-emitting area 3b. This allows the light-emitting area 3b to function as a light source.
[0029] As described above, the vehicle sun visor 1 has a plate-shaped visor body 10 and a light source 4 provided in the visor body 10, as shown in FIG. 2. In the mirror unit 2, a light guide plate 6a through which light from the light source 4 can pass is disposed on the front side of the light source 4, as shown in FIGS. 4 and 8. One of the end faces of the light guide plate 6a is a first exit surface 6b that reflects light incident from the back side of the light guide plate 6a into the light guide plate 6a along the light guide plate 6a. A second exit surface 6c that reflects light passing along the light guide plate 6a to the front side is formed on the back side of the light guide plate 6a (see FIG. 8). A mirror plate 3 is provided in parallel with the front side of the light guide plate 6a. The mirror plate 3 has a mirror area 3a that covers the light source 4 and the first exit surface 6b of the light guide plate 6a from the front side. A reflective film 8 that constitutes a mirror is attached to the back side of the mirror area 3a of the mirror plate 3. The mirror plate 3 has a light-emitting region 3b that covers the second emission surface of the light guide plate 6a from the front side. A diffusion member (e.g., diffusion sheet 7) is directly and closely contacted with the back surface 3d of the light-emitting region 3b of the mirror plate 3, and the diffusion member (diffusion sheet 7) diffuses the light from the light guide plate 6a to the front side.
[0030] Therefore, the light guide plate 6a and the mirror plate 3 are overlapped in the thickness direction. This allows the mirror and light emitting structure to be formed in a relatively thin structure. The diffusion member (diffusion sheet 7) is directly and closely attached to the back surface of the mirror plate 3. Therefore, no gap is formed between the diffusion member (diffusion sheet 7) and the mirror plate 3. Therefore, the light that passes through the diffusion member (diffusion sheet 7) is not blocked or polarized by the air in the gap or the dust that has entered the gap. As a result, the light emitted from the light emitting region 3b of the mirror plate 3 is diffused toward the user at a suitable angle. The light source 4 and the first exit surface 6b of the light guide plate 6a are covered with a reflective film 8. Therefore, the light source 4 and the first exit surface 6b of the light guide plate 6a are prevented from directly entering the user's field of vision. This makes it possible to prevent the user from feeling dazzled.
[0031] As shown in FIG. 6, the diffusion member (e.g., diffusion sheet 7) has a smooth surface (e.g., smooth surface 7a) that directly contacts the back surface of the mirror plate 3, and a back surface (e.g., uneven surface 7b) that has an uneven shape to diffuse light. Therefore, when the smooth surface (smooth surface 7a) of the diffusion member (diffusion sheet 7) is brought into close contact with the back surface of the mirror plate 3, the area of the contact portion between the mirror plate 3 and the diffusion member (diffusion sheet 7) becomes wider. This makes it possible to more reliably prevent gaps from being generated at the contact surface between the mirror plate 3 and the diffusion member (diffusion sheet 7). Therefore, the light emitted from the light-emitting region 3b of the mirror plate 3 is diffused toward the user at a suitable angle. Moreover, the strength of the contact between the mirror plate 3 and the diffusion member (diffusion sheet 7) can be improved.
[0032] 6, the diffusion member (e.g., diffusion sheet 7) is directly and closely attached to the rear surface of the mirror plate 3 by adhesion. Therefore, the mirror plate 3 and the diffusion member (diffusion sheet 7) are in close contact with each other at their contact surfaces. This makes it possible to configure the diffusion member (diffusion sheet 7) to be less likely to peel off from the mirror plate 3.
[0033] 7 and 8, the reflector 6 and the light guide plate 6a are inclined at the same angle on the end face on the center side of the unit base 5, thereby forming a first light exit surface 6b (see FIG. 8). Furthermore, the first light exit surface 6b is disposed so as to overlap with the light beam of the light source 4. Therefore, the light emitted by the light source 4 can be incident on the light guide plate 6a while hiding the light source 4 from the user's view.
[0034] As shown in Fig. 7, the mirror unit 2 has the mirror plate 3 and the substrate 5b arranged so that their respective planes are parallel to each other. This configuration allows the mirror plate 3 and the substrate 5b to be arranged independently of the thickness of the visor body 10. Furthermore, the mounting surface of the substrate can be used widely. Therefore, electronic components other than the light source 4 can be mounted on a single substrate, and the number of components and the number of assembly steps can be reduced, leading to cost reduction.
[0035] The present disclosure is not limited to the appearance and configuration described in the above-described embodiment, and various modifications, additions, and deletions are possible without departing from the spirit and scope of the present disclosure.
[0036] For example, as shown in Figs. 11 and 12, the diffusion member may be formed by an uneven shape formed on the back surface 3d of the light-emitting region of the mirror plate 3. Specifically, the uneven shape is formed by mechanically cutting the reflective film at both left and right ends of the mirror plate 3 (see Fig. 12). The uneven shape is formed into a striped pattern, a lattice pattern, a grain pattern, or the like by laser processing, for example. A partial depression may be formed by shot peening. That is, the diffusion member (uneven shape of the back surface 3d of the light-emitting region) is formed on the mirror plate 3 itself, not as a separate member from the mirror plate 3. This allows the number of parts of the vehicle sun visor 1 to be reduced. In addition, since the diffusion member (uneven shape of the back surface 3d of the light-emitting region) is formed on the mirror plate 3 itself, no gap is formed between the mirror plate 3 and the diffusion member (uneven shape of the back surface 3d of the light-emitting region).
[0037] The mirror plate 3 shown in FIG. 11 may have a configuration having a second diffusion member (e.g., diffusion sheet 7) that directly contacts the back surface of the diffusion member (the uneven shape of the back surface 3d of the light-emitting region). The front and back surfaces of the second diffusion member (diffusion sheet 7) are both smooth. A planar colored member (e.g., a milky white material) containing a coloring material is provided by printing on the back surface of the second diffusion member (diffusion sheet 7). Therefore, the light from the light guide plate 6a is colored by passing through the colored member. This allows the color of the light emitted from the light-emitting region 3b of the mirror plate 3 to be set arbitrarily. The colored member is located on the upstream side of the second diffusion member (diffusion sheet 7). Therefore, the colored member can be made relatively small. For example, when the colored member is disposed on the downstream side of the second diffusion member (diffusion sheet 7), it is necessary to enlarge the colored member in consideration of the diffusion of light. Compared to such a structure, the colored member can be made relatively small. The colored member may be attached in a sheet state instead of being printed.
[0038] The second diffusion member (diffusion sheet 7) may have a smooth front surface 7a that contacts the diffusion member (diffusion sheet 7) and a back surface 7b that has an uneven shape to diffuse light, as shown in Fig. 6. The light from the light guide plate 6a is diffused by the second diffusion member (diffusion sheet 7). The light emitted from the second diffusion member (diffusion sheet 7) is further diffused by the uneven shape formed on the back surface 3d of the light emitting area. As a result, the light emitted from the light emitting area 3b of the mirror plate 3 is diffused toward the user at a wider angle.
[0039] In the mirror plate 3 shown in Fig. 11, the uneven shape of the back surface 3d of the light-emitting region functions as a diffusing member. In this way, when the back surface of the mirror plate 3 is mechanically processed, a configuration may be adopted in which a second diffusing member (diffusing sheet 7) is not attached to the back surface 3d of the light-emitting region. Alternatively, a configuration may be adopted in which a flat colored member (e.g., a material of milky white, orange, etc.) containing a coloring material is printed on the uneven shape of the back surface 3d of the light-emitting region. The colored member may also be attached in a sheet state.
[0040] A planar colored member (e.g., a milky white or orange material) containing a coloring agent may be provided on the back surface of the diffusion sheet 7, 30 shown in Figs. 6 and 9. The light from the light guide plate 6a is colored by passing through the colored member. This allows the color of the light emitted from the light emitting region 3b of the mirror plate 3 to be set as desired. The colored member is located on the upstream side of the diffusion sheet 7, 30. This allows the colored member to be made relatively small. The colored member can be attached by any method, such as by printing or by adhering in a sheet state.
[0041] The diffusion sheet 7 shown in Fig. 6 has a smooth surface 7a attached to the mirror plate 3, and an uneven surface 7b facing away from the mirror plate 3. Alternatively, a diffusion sheet 30 shown in Fig. 9 may be provided. The uneven surface 30b of the diffusion sheet 30 is bonded to the back surface 3d of the light-emitting area 3b of the mirror plate 3. The smooth surface 30a faces away from the mirror plate 3. Alternatively, a diffusion sheet 31 shown in Fig. 10 may be provided. The diffusion sheet 31 is made of a material 31a containing a light-reflecting substance such as glass beads.
[0042] The diffusion sheet 7 shown in Fig. 6 is attached to the mirror plate 3 with an adhesive or adhesive tape. Alternatively, the diffusion member may be printed on the mirror plate 3 by an inkjet method or a screen printing method. This makes it difficult for the diffusion member to peel off from the mirror plate 3. The diffusion member may be a sheet-like member alone, or may be thinly printed on the back surface of the mirror plate 3.
[0043] The mirror shown in Fig. 3 is a half mirror, and has a mirror plate 3 made of a light-transmitting material, and a reflective film 8 that reflects light (see Fig. 5). Alternatively, a normal mirror may be provided in the mirror area 3a. The mirror plate 3 shown in Fig. 3 may be made of glass, or may be made of a material that allows light to pass through, such as acrylic resin. The reflective film 8 shown in Fig. 5 is a silver film printed on the mirror plate 3. Instead of the silver film, aluminum may be attached to the mirror plate 3 by vapor deposition or the like.
[0044] The visor body 10 shown in Fig. 2 is configured to have two shells. Alternatively, the visor body 10 may be formed in one piece from foam beads or the like.
[0045] The light source 4 shown in Fig. 4 is an LED. Alternatively, other types of light sources may be used as the light source 4. The number and arrangement of the light sources 4 may be changed as appropriate. The light guide plate 6a shown in Fig. 4 is made of an acrylic resin. Alternatively, the light guide plate 6a may be made of other materials such as polycarbonate or glass.
[0046] The first exit surface 6b shown in Fig. 8 is inclined so that the plane faces the base 5a. The inclination angle is set arbitrarily. The first exit surface 6b is a flat surface whose cross section is a straight line. Alternatively, the first exit surface 6b may be formed into a curved surface, a bent shape, or the like.
[0047] 8, a second emission surface 6c is formed on the rear surface of the light guide plate 6a. The second emission surface 6c can be formed by a variety of methods, such as by printing a dot pattern or by cutting a groove. [Explanation of symbols]
[0048] 1 Vehicle sun visor 2 Mirror unit 2a Mirror frame 2b Lid 3 Mirror plate 3a Mirror area 3b Light-emitting area 3d luminous area back 4 light source 5 units 5a Base 5b Substrate 5c Switch 6 Reflector 6a Light guide plate 6b 1st exit surface 6c 2nd exit surface 7 Diffusion sheet (diffusion material) 7a Smooth surface (surface of diffusion member) 7b Textured surface (back surface of diffusion material) 8 Reflective film 10 Visor body
Claims
1. A sun visor for a vehicle having a mirror and a light source, A plate-shaped visor body; A light source provided within the visor body; a light guide plate disposed on a front side of the light source and through which light from the light source can pass; A mirror plate is provided on the front side of the light guide plate, The light guide plate is a first exit surface inclined with respect to the rear surface of the light guide plate so as to reflect light incident from the rear surface of the light guide plate into the light guide plate along the light guide plate; a third exit surface formed on the plate surface so as to reflect the light incident into the light guide plate from the plate surface of the light guide plate toward a rear surface of the light guide plate; A second exit surface is formed on a rear surface of the light guide plate, The mirror plate is a mirror region covering the light source and the first and third exit surfaces of the light guide plate from a front side; A reflective film attached to the rear surface of the mirror area to form a mirror; a light emitting region of the mirror plate covering the second exit surface of the light guide plate from a front side thereof; the second exit surface reflects, to the front side, light that is reflected by the first exit surface, which is an end surface of the light guide plate, and passes along the light guide plate, light that is reflected by the third exit surface, which is a plate surface of the light guide plate, and light that passes through the plate surface of the light guide plate, is reflected by a fourth exit surface, which is a rear surface of the reflecting film facing the plate surface, and is incident on the light guide plate from the plate surface; A diffusing member is provided on a rear surface of the light emitting region of the mirror plate in direct contact therewith, for diffusing light from the second emission surface of the light guide plate to a front side.
2. 2. The sun visor for a vehicle according to claim 1, A sun visor for a vehicle, wherein the second emission surface of the light guide plate is configured only as a single plane parallel to a plate surface of the light guide plate.
3. 3. The sun visor for a vehicle according to claim 1, The diffusing member has a smooth surface that is in direct contact with the rear surface of the mirror plate, and a rear surface that is provided with an uneven shape to diffuse light.
4. 4. The sun visor for a vehicle according to claim 3, The diffusing member is a printed coating film printed on the rear surface of the light emitting area of the mirror plate.
5. A sun visor for a vehicle as described in claim 3, A flat printed coating film containing a coloring material is provided on a back surface of the diffusion member, the flat printed coating film covering the uneven shape to make the back surface of the diffusion member flat.
Citation Information
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