JP5452293B2 - Vehicle sun visor - Google Patents

Description

  The present invention relates to a vehicle sun visor including a mirror part and a light emitting part on the surface of a sun visor body.

  2. Description of the Related Art Conventionally, a vehicle sun visor is known that includes a mirror portion called a so-called vanity mirror on the surface of a sun visor body. Further, many sun visors of this type have been proposed that include a light emitting unit for illuminating an occupant or the like that uses a mirror unit.

  Here, in order to prevent an unpleasant illusion etc. from being given to the occupant, it is preferable that the light emitting unit used in the sun visor emits light in a planar shape. For example, Patent Document 1 discloses that an illumination room is formed inside and one surface. A housing provided with an opening communicating with the lighting chamber, a light source disposed in a position hidden from the opening inside the housing, and a light diffused and reflected on the inner wall surface of the lighting chamber for wide diffusion and high reflection There is disclosed a technique in which a lamp unit configured to include a wide diffusion and high reflection means and a planar light emitter disposed in an opening is provided and integrated at a position adjacent to the vanity mirror unit.

JP 2003-118479 A

  By the way, like the technique disclosed in Patent Document 1 described above, when a light emitting unit is provided in a sun visor, the light emitting unit and the mirror unit are generally configured using individual components. Therefore, the configuration of the sun visor provided with the light emitting unit tends to be complicated. In particular, when the light emitting part is provided in a plurality of directions as well as in one side direction of the mirror part, it is necessary to arrange individual light sources in each direction, and the complexity of the configuration becomes remarkable. Such a complicated configuration also becomes a factor of layout constraints.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a vehicle sun visor capable of arranging a light emitting unit at an arbitrary position with respect to a mirror unit with a simple configuration.

A vehicle sun visor according to an aspect of the present invention includes: a sun visor body; a light source disposed in the sun visor body; and a light guide plate that receives light from the light source in the sun visor body. Is formed by sticking a mirror sheet on the back side of the light guide plate in a region on the surface exposed to the outside from the inside of the sun visor body, and on the back side of the light guide plate. And a light emitting portion that is formed by forming a prism portion and emits incident light from the light source .

  According to the vehicle sun visor of the present invention, the light emitting unit can be arranged at an arbitrary position with respect to the mirror unit with a simple configuration.

Exploded perspective view showing schematic configuration of vehicle sun visor Top view of vehicle sun visor The top view which shows the internal structure of the sun visor for vehicles by partly breaking the holding member Cross-sectional view of main parts along the line IV-IV in FIG. Main part sectional drawing which follows the VV line of FIG. Explanatory drawing which shows the behavior of the light in a light-guide plate in each area | region corresponding to a mirror part and a light emission part. Explanatory drawing which shows the connection structure with respect to the frame of a holding member Explanatory drawing showing the luminance distribution on the light emitting part Sectional drawing of the principal part showing the light guide plate along the line IX-IX in FIG. Cross-sectional view of the main part showing a modification of the light guide plate

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The drawings relate to one embodiment of the present invention, FIG. 1 is an exploded perspective view showing a schematic configuration of a vehicle sun visor, FIG. 2 is a plan view of the vehicle sun visor, and FIG. FIG. 4 is a cross-sectional view of main parts taken along line IV-IV in FIG. 2, FIG. 5 is a cross-sectional view of main parts taken along line V-V in FIG. 2, and FIG. FIG. 7 is an explanatory diagram showing the connection structure of the holding member to the frame, and FIG. 8 is an explanatory diagram showing the luminance distribution on the light emitting unit. 9 is a main part sectional view showing the light guide plate along the line IX-IX in FIG. 8, and FIG. 10 is a main part sectional view showing a modification of the light guide plate.

  The vehicle sun visor 1 shown in FIGS. 1 to 3 includes a light source module 10 having, for example, a surface-mounted light emitting diode (LED) 12 as a light source, and a LED 12 in a sun visor body 5 formed in a flat plate shape. The light guide plate 15 that receives the light is accommodated to constitute a main part.

  The sun visor body 5 has, for example, a pair of shells (first and second shells 6 and 7) made of urethane resin or the like, and these are joined to each other to form a main part.

  An annular groove 6a is formed in the first shell 6 along the edge of the joint surface with the second shell 7, and a reinforcing frame 20 is held in the groove 6a. ing. The first shell 6 is formed with a recess 6b corresponding to the light source module 10 and the light guide plate 15 in a region inside the groove 6a.

  Here, the frame body 20 of the present embodiment is formed of a metal frame having good thermal conductivity, and a bearing 21 having a substantially cylindrical shape is fixed to one side of the frame body 20. Further, one end portion of a substantially L-shaped support shaft 22 is rotatably connected to the bearing 21, and a bracket 23 is rotatably connected to the other end portion of the support shaft 22. The sun visor body 5 is supported by the vehicle interior ceiling in a displaceable manner via the support shaft 22 by fixing the bracket 23 to the vehicle interior ceiling.

  The second shell 7 is provided with a hole 7 a having a shape substantially the same as that of the recess 6 b of the first shell 6. Further, the second shell 7 has an edge portion on the surface side. A frame-shaped trim 8 that covers a part of the rear portion 7a is fixed along. And these hole part 7a and the trim 8 form the lamp chamber 9 in the inside of the sun visor main body 5 with the recessed part 6b, and accommodate the light source module 10 and the light-guide plate 15. FIG.

  The light source module 10 includes, for example, a strip-shaped LED mounting substrate 11 made of a metal material having high thermal conductivity such as an aluminum alloy, and a plurality of (for example, two) LEDs 12 are formed on the LED mounting substrate 11. The main part is configured.

  The light guide plate 15 is configured by a flat plate-like member having a substantially rectangular shape in plan view made of a light-transmitting material such as acrylic resin, and one end surface thereof receives light from each LED 12 of the light source module 10. Is set as the incident surface 15a.

  The light source module 10 and the light guide plate 15 are accommodated in the lamp chamber 9 and are integrally held via a holding member 30.

  Specifically, for example, as shown in FIG. 1, the holding member 30 includes a holding member body 30 a having a substantially U-shaped cross section that can accommodate the light source module 10 therein, and both ends of the holding member body 30 a. A pair of claw portions 30b protruding from the portion are integrally formed of a metal member having high heat conductivity to constitute a main portion.

  As shown in FIGS. 3 to 6, the holding member 30 is connected to one end of the light guide plate 15 by fitting the holding member main body 30a, and sandwiches the light source module 10 with the incident surface 15a. Thereby, each LED12 is contact | abutted to the entrance plane 15a, and it becomes possible to make the emitted light inject into the light-guide plate 15 efficiently. In addition, the back side of the LED mounting substrate 11 is brought into contact with the holding member 30, and heat generated by each LED 12 can be efficiently transmitted to the holding member 30.

  As shown in FIGS. 3 and 7, the holding member 30 is installed on the frame body 20 by caulking each pair of claws 30 b, and the light source module 10 and the light guide plate 15 are integrated into the lamp chamber 9. Hold. In this case, the holding member 30 is also thermally connected to the frame body 20 by caulking of the claw portions 30b, and forms a heat radiation path for transmitting heat generated by each LED 12 to the frame body 20. In addition, the holding member 30 stiffens the frame body 20 by being installed on the frame body 20.

  Here, as shown in FIGS. 2, 4, and 5, the light source module 10 and the light guide plate 15 are arranged so that only the surface 15 b side of the light guide plate 15 is exposed to the outside of the sun visor body 5 through the opening 8 a of the trim 8. Positioning is performed in the chamber 9. In the exposed area on the light guide plate 15, a mirror part 35 that reflects external light and a light emitting part 36 that emits incident light from each LED 12 are set.

  More specifically, in the present embodiment, the mirror part 35 is set to a rectangular area located approximately in the center of the exposed area, and the light emitting part 36 is set to an annular area surrounding the outer periphery of the mirror part 35.

  In order to realize each of these functional units, for example, a mirror surface sheet 37 is affixed to a substantially central rectangular region on the back surface 15c side of the light guide plate 15 (see FIG. 4). And the said rectangular area implement | achieves the function as the mirror part 35 by reflecting the external light which injected from the surface 15b side of the light-guide plate 15 by the mirror surface sheet 37, and radiate | emits it from the surface 15b side (refer FIG. 6). . The mirror sheet 37 may be affixed to the surface 15 b of the light guide plate 15.

  A fine prism portion 38 is formed in an annular region surrounding the rectangular region on the back surface 15c side of the light guide plate 15 (see FIGS. 4 and 5). The annular region emits light by reflecting the light from each LED 12 that enters the light guide plate 15 from the incident surface 15a and travels while repeating total reflection, and is reflected from the prism portion 38 and emitted from the surface 15b side. The function as the unit 36 is realized.

  According to such an embodiment, the light source module 10 and the light guide plate 15 are accommodated in the lamp chamber 9 formed in the sun visor body 5, and are exposed to the region on the surface 15 b of the light guide plate 15 exposed from the sun visor body 5 to the outside. By setting the mirror part 35 that reflects external light and the light emitting part 36 that emits incident light from the light source module 10, the light emitting part 36 can be placed at an arbitrary position with respect to the mirror part 35 with a simple configuration. Can be arranged. That is, by forming the mirror part 35 and the light emitting part 36 on the single light guide plate 15, the structure can be simplified even when the light emitting part 36 is provided side by side with the mirror part 35. In addition, since the arrangement of the mirror part 35 and the light emitting part 36 can be arbitrarily changed by the arrangement of the mirror sheet 37 and the prism part 38 with respect to the light guide plate 15, the degree of freedom in designing the layout can be greatly improved.

  By the way, in general, the light emission characteristics of the LED are highly temperature dependent, and the amount of light emission tends to decrease as the temperature increases. In this embodiment, each LED 12 is thermally connected to the frame body 20 via the holding member 30. By connecting, overheating of the LED 12 can be accurately prevented, and suitable illumination using the light emitting unit 36 can be realized.

  Here, for example, as shown in FIG. 8, it is possible to set the luminance of the light emitted from the light emitting unit 36 described in the above embodiment so as to increase as it approaches the corner of the mirror unit 35. is there. Such setting of the luminance gradient can be easily realized, for example, by appropriately adjusting the pitch P and the size of the prism portions 38 as shown in FIG. By providing such a luminance gradient in the light emitting unit 36, for example, when the occupant observes the mirror unit 35, a large amount of light emitted from the light emitting unit 36 is directly irradiated to the occupant's eyes. Can be suppressed.

  Further, for example, as shown in FIG. 10, when a relatively large light guide plate 15 is used, an inclination is provided in a region corresponding to the light emitting portion 36 on the back surface 15 c side of the light guide plate 15, and the prism portion is formed by the inclination. It is also possible to make a setting so as to compensate for a decrease in the amount of light in a region located far from the LED 12 by changing the reflection characteristics of 38.

  In the above-described embodiment, an example in which the annular light emitting unit 36 is set in a region surrounding the outer periphery of the mirror unit 35 has been described. However, the present invention is not limited to this example. Of course, the relationship between the mirror part 35 and the light emitting part 36 can be arbitrarily set, such as setting the light emitting part 36 along the two sides.

DESCRIPTION OF SYMBOLS 1 ... Sun visor for vehicles 5 ... Sun visor main body 6 ... 1st shell 6a ... Groove 6b ... Recess 7 ... 2nd shell 7a ... Hole 8 ... Trim 8a ... Opening 9 ... Lamp chamber 10 ... Light source module 11 ... LED mounting board 12 ... Light emitting diode (light source)
DESCRIPTION OF SYMBOLS 15 ... Light guide plate 15a ... Incident surface 15b ... Front surface 15c ... Back surface 20 ... Frame 21 ... Bearing 22 ... Support shaft 23 ... Bracket 30 ... Holding member 30a ... Holding member main body 30b ... Claw part 35 ... Mirror part 36 ... Light emission part 36 ... Light emitting part 37 ... Mirror surface sheet 38 ... Prism part

Claims (4)

The sun visor itself,
A light source disposed in the sun visor body;
A light guide plate for entering light from the light source in the sun visor body,
The light guide plate, the area on the surface exposed to the outside from the sun visor body, and a mirror unit for reflecting formed outside light by attaching a mirror sheet on the back side of the light guide plate, the light guide plate A vehicle sun visor, comprising: a light emitting portion that is formed by forming a prism portion on a back surface side and emits incident light from the light source. Forming the light emitting part in an annular region surrounding the outer periphery of the mirror part;
2. The vehicle sun visor according to claim 1 , wherein the luminance of the light emitting unit is set so as to increase toward the corner of the mirror unit. The sun visor body has a reinforcing frame,
The vehicle sun visor according to claim 1, wherein the light source is thermally connected to the frame. A holding member for holding the light source in the lamp chamber is installed on the frame body,
The vehicle sun visor according to claim 3, wherein the light source is thermally connected to the frame through the holding member.

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