JP2012206597A - Door mirror lighting unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a door mirror lighting unit that increases the amount of light to be guided from a light source to a vehicle rear end part of a light emitting part with an extremely simple configuration.SOLUTION: The door mirror lighting unit includes a light emitting part 31 extended in a part of a housing cover on the vehicle front side of the door mirror attached to the vehicle. One end of the light emitting part is located in a front surface part of the housing cover 22 corresponding to the vehicle front. The other end (vehicle rear end part) of the light emitting part is located in a side surface part of the housing cover corresponding to the side of the vehicle. The door mirror lighting unit includes light sources 34 disposed side by side along an extending direction of the light emitting part 31, and a lightguide part 35 formed integrally with the light emitting part 31 between the light sources 34 and the light emitting part 31 to guide the light from the light sources 34 to the light emitting part 31. A through hole 40a is formed in a part close to the light emitting part 31 of the lightguide part 3. The light from at least one light sources is guided to the other end (vehicle rear end part) of the light emitting part 31, using a part of a side wall surface 40aR of the through hole 40a as a reflection surface.

Description

  The present invention relates to a door mirror lamp, for example, a side turn lamp device built in a door mirror.

  This type of door mirror lamp includes a light irradiating portion made of a translucent material arranged to extend to a part of a housing cover on the vehicle front side of a door mirror attached to the vehicle, and a built-in door mirror. And a plurality of light sources such as light emitting diodes arranged in parallel along the extending direction of the light irradiating unit, and light from these light sources is configured to irradiate the light irradiating unit.

  Here, the light irradiating part is arranged such that one end is located on the front part corresponding to the front of the vehicle of the housing cover and the other end is located on the side part corresponding to the side of the vehicle of the housing cover. Is configured to be guided to the other end portion of the light irradiation unit. This is because the lighting of the light source can be recognized even from the rear of the vehicle.

  In this case, in order to increase the amount of light guided to the other end of the light irradiator (hereinafter, sometimes referred to as a vehicle rear end), the surface facing the light source of the light irradiator is subjected to a half mirror process. A part of the light from the light source is reflected by the half mirror processing surface and the reflected light is guided to the vicinity of the vehicle rear end of the light irradiator (see Patent Document 1 below). ).

JP 2009-107601

  However, the door mirror lamp disclosed in Patent Document 1 must be subjected to half mirror processing on the surface facing the light source of the light irradiating unit, which complicates manufacture and complicates the configuration. It was.

  In addition, since the light from the light source reflected by the half mirror processing surface is also irradiated to the light source side, in order to return this light to the half mirror processing surface again, for example, the light is reflected on the base on which the light source is mounted. A processing surface has to be formed. In this respect as well, the manufacturing is complicated and the configuration is complicated.

  The present invention has been made based on such circumstances, and its purpose is to increase the amount of light from the light source that is guided to the rear end of the light irradiating unit in spite of its extremely simple configuration. It is to provide a door mirror lamp that can be used.

  In order to achieve such an object, according to the present invention, a light guide part is formed integrally with the light irradiation part between the light source and the light irradiation part, and a part of the light guide part adjacent to the light irradiation part. For example, a rectangular through hole is formed, and a part of the side wall surface of the through hole is used as a reflection surface so that light from the light source is guided to the rear end of the light irradiation unit.

The present invention is grasped by the following composition.
(1) A door mirror lamp according to the present invention is a light made of a translucent material that is incorporated in a door mirror and extends and arranged in a part of a housing cover on the vehicle front side of the door mirror when attached to the vehicle. An irradiation unit, wherein one end of the light irradiation unit is positioned on a front surface of the housing cover corresponding to the front of the vehicle, and the other end of the light irradiation unit is on a side of the vehicle of the housing cover. A door mirror lamp positioned on a corresponding side surface,
A plurality of light sources arranged in parallel along the extending direction of the light irradiating unit, and formed integrally with the light irradiating unit between each light source and the light irradiating unit, and the light from each light source is A light guide part that leads to the light irradiation part, and a through hole or a concave part is formed in a part of the light guide part adjacent to the light irradiation part, and light from at least one of the light sources is the through hole or the concave part. A part of the side wall surface of the part is configured to be led to the other end of the light irradiation unit as a reflection surface.

(2) The door mirror lamp according to the present invention is the configuration of (1), wherein the side wall surface of the through hole or the recessed portion that guides the light from the light source to the other end of the light irradiation unit is in the direction of the perpendicular line. On the other hand, it is characterized by comprising a plane having an inclination such that an incident angle of light from the light source and an outgoing angle emitted to the other end of the light irradiating portion are substantially equal.
(3) In the configuration of (1), the door mirror lamp according to the present invention has a plurality of the light transmitting or recessed portions arranged in parallel along the longitudinal direction of the light irradiation portion, and the light from at least one of the light sources is After reflecting a part of the side wall surface of one of the light-transmitting or recessed portions arranged adjacently as a reflection surface, reflecting a part of the side wall surface of the other light-transmitting or recessed portion arranged adjacently It is configured to be guided to the light irradiation unit by being reflected as a surface.

  According to the door mirror lamp having such a configuration, it is possible to increase the amount of light from the light source guided to the vehicle rear end portion of the light irradiating portion, despite the extremely simple configuration.

It is the figure which showed a part of path | route (light path) where the light from each light source of the door mirror lamp of this invention reaches a light irradiation part with a dotted line. It is the figure which showed the external appearance of the door mirror to which this invention is applied. FIG. 3 is an exploded view of the door mirror shown in FIG. 2. It is the figure which showed the external appearance of the side turn lamp apparatus which is a lamp for door mirrors of this invention. FIG. 5 is an exploded view of the side turn lamp device shown in FIG. 4. It is the top view which looked at the lower case shown in FIG. 5 from right above. It is the figure which showed the one side wall surface of the light guide by the positional relationship of a light source and the vehicle rear end part of a light irradiation part.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the accompanying drawings. Note that the same number is assigned to the same element throughout the description of the embodiment.
(Embodiment 1)
<Overall schematic configuration of door mirror>
FIG. 2 is a view showing the appearance of a door mirror to which the present invention is applied, and is a view of the door mirror viewed from the front of the vehicle. In FIG. 2, x, y, and z directions are shown, which are in agreement with the forward direction of the vehicle, the width direction of the vehicle, and the height direction of the vehicle, respectively.

  In FIG. 2, a door mirror 20 is attached to a vehicle door 10 via a connecting portion 11. The door mirror 20 includes, in appearance, a mirror 21 disposed on the rear side of the vehicle and a housing cover 22 disposed on the front side of the vehicle. The housing cover 22 is made of an opaque material, for example. Then, a part of the surface of the housing cover 22 is arranged so that a light irradiation part 31 of a side turn lamp device (denoted by reference numeral 30 in FIG. 3) described later built in the door mirror 20 is exposed. Yes. The light irradiation portion 31 has a belt-like shape extending horizontally from the substantially center of the housing cover 22 to the outer side in the width direction of the vehicle, and is a long hole (reference numeral in FIG. 3) formed on the surface of the housing cover 33. 22A).

  FIG. 3 is an exploded view of the door mirror 20 shown in FIG. The x, y, and z directions shown in FIG. 3 are made to coincide with the forward direction of the vehicle, the width direction of the vehicle, and the height direction of the vehicle, respectively, as in the case of FIG.

  In FIG. 3, a door mirror housing 23 is fixed to a connecting portion 11 provided on a vehicle door 10. A mirror 21 is attached to the rear side surface of the door mirror housing 23 via an actuator 24. The actuator 24 has a mechanism that can adjust the angle of the mirror 21. A side turn lamp device 30 is arranged on the front surface of the door mirror housing 23 in the vehicle. The side turn lamp device 30 includes the light irradiation unit 31 described above. The configuration of the side turn lamp device 30 will be described in detail later. The housing cover 22 is attached to the door mirror housing 23 so as to expose the mirror surface of the mirror 21 and to cover the door mirror housing 23 and the side turn lamp device 30. The housing cover 22 is formed with a long hole 22 </ b> A for exposing the light irradiation part 31 of the side turn lamp device 30.

<Side turn lamp device>
FIG. 4 is a view showing an appearance of the side turn lamp device 30. FIG. 4 is a perspective view of the side turn lamp device 30 when attached to the door mirror 20 as viewed from the door mirror housing 23 side.
As shown in FIG. 4, there is a case 32, and this case 32 is composed of a lower case 32D and an upper case 32U that are engaged with each other. The case 32 contains a circuit board (indicated by reference numeral 33 in FIG. 5) on which a light source is mounted. The case 32 includes a light irradiation unit 31 on the side facing the housing cover 22.

  FIG. 5 shows a perspective view of the side turn lamp device 30 shown in FIG. 4 with the upper case 32U removed from the lower case 32D and the circuit board 33 on which the light source is mounted detached from the lower case 32D. . Here, on the circuit board 33, for example, a light source 34 composed of three light emitting diodes is mounted on the surface facing the lower case 32D. Each of the three light sources 34 is sequentially mounted with a light source 34A, a light source 34B, and a light source 34C along one end 31P to the other end 31Q (hereinafter, sometimes referred to as a vehicle rear end 31Q) of the light irradiation unit. Has been.

  In the lower case 32D, a light guide part 35 for guiding light from the light sources 34A, 34B, 34C to the light irradiation part 31 is made of a translucent material made of, for example, resin. Here, the lower case 32D is made of a translucent material made of resin, for example, and the light guide 35 is integrally formed (formed) with the same material as the lower case 32D. However, the lower case 32D is formed separately from the light guide portion 35 and may not be formed of a light transmissive material.

  The light irradiation unit 31 is made of a translucent material made of, for example, resin, and is formed (molded) integrally with the light guide unit 35. The light irradiation part 31 has a circular cross section orthogonal to the extending direction. By making the light irradiation part 31 in such a shape, the light guided from the light guide part 35 can be irradiated with spreading in the vertical direction.

  The light guide 35 is composed of a light guide provided for each of the light sources 34A, 34B, and 34C. The light guide 35A and the light guide 35A are sequentially guided from one end 31P of the light irradiation unit 31 to the vehicle rear end 31Q. A light body 35B and a light guide 35C are arranged. Each of the light guide 35A, the light guide 35B, and the light guide 35C is configured as a protrusion having a step from the bottom surface of the lower case 32D.

  When the circuit board 33 is attached to the lower case 32D, the light guide 35A, the light guide 35B, and the light guide 35C face the light sources 34A, 34B, and 34C mounted on the circuit board 33, respectively. Are formed so as to have one side wall surface (indicated by reference numerals 36A, 36B, and 36C). A Fresnel lens (not shown) made up of a plurality of concentric circular grooves is formed on the one side wall surface of each of the light guide 35A, the light guide 35B, and the light guide 35C, and the light source 34A, Light from the light sources 34B and 34C can be efficiently guided to the inside. As shown in FIG. 5, a protrusion 37 is formed on the upper surface of the light guide 35, and the circuit board 33 is inserted into the hole 38 formed in the lower case 32D. Are positioned and arranged.

  FIG. 6 is a plan view of the lower case 32D shown in FIG. 5 viewed from directly above. In FIG. 6, for easy understanding, the light sources 34 </ b> A, 34 </ b> B, and 34 </ b> C are illustrated, and the light guide unit 35 is illustrated as a dotted area. As shown in FIG. 6, the light guide 35 </ b> A, the light guide 35 </ b> B, and the light guide 35 </ b> C are each viewed from the above-described one side surface (the surface on which the light source 34 is opposed). And is formed in a shape that is connected to other light guides adjacent to each other at a portion close to the light irradiation unit 31. That is, the light guide 35 </ b> B is configured to be connected to the light guide 35 </ b> A and the light guide 35 </ b> C in a portion close to the light irradiation unit 31. As a result, the light from each of the light sources 34A, 34B, 34C is guided radially into the light guides 35A, 35B, 35C having the above-described shape, reaches the light irradiation unit 31, and the light irradiation unit 31 extends. Uniform luminance can be ensured along the direction.

  And the light guide part 35 which adjoins the light irradiation part 31 is formed along with the extending direction of this light irradiation part 31, for example by arranging two rectangular holes 40a and 40b in parallel. Each of the through holes 40a and 40b has four side wall surfaces, and these side wall surfaces intersect with the two side wall surfaces facing each other and arranged substantially parallel to the light irradiation unit. It consists of two side wall surfaces arranged in the direction.

  Here, the through hole disposed on the vehicle rear end portion 31Q side of the light irradiation unit 31 is referred to as a through hole 40a, and the through hole disposed on the one end portion 31P side of the light irradiation unit 31 is referred to as a through hole 40b.

  The through hole 40a has a side wall surface 40aR on the vehicle rear end portion 31Q side of the light irradiating unit 31 among the two side wall surfaces arranged in a direction intersecting the light irradiating unit 31, and is positioned on the light irradiating direction of the light source 34C. Are arranged to be. The side wall surface 40aR functions as a reflecting surface that directs and emits light from the light source 34C toward the vehicle rear end portion 31Q of the light irradiation unit 31. As a result, as shown in FIG. 7, the side wall surface 40aR of the through hole 40a has an incident angle θ1 of light from the light source 34C and the vehicle rear end 31Q of the light irradiation unit 31 with respect to the direction of the perpendicular S. It is comprised by the plane which has the inclination that the output angle (theta) 2 radiate | emitted to becomes substantially equal. The other side wall surface 40aLf facing the side wall surface 40aR of the through hole 40a is formed substantially parallel to the side wall surface 40aR. The side wall surface 40aL will function as a reflection surface for causing the light irradiation unit 31 to emit light reflected by the side wall surface 40bR of the through hole 40b, as will be apparent from the following description. Furthermore, the side wall surface 40aS formed near the light irradiation part 31 of the through hole 40a and along the longitudinal direction of the light irradiation part 31 causes the light incident from the light irradiation part 31 to be emitted again to the light irradiation part 31. Functioning as a reflective surface.

  The through hole 40b has a side wall surface 40bR on the vehicle rear end 31Q side of the two side wall surfaces arranged in a direction intersecting with the light irradiation unit 31. It is arranged to be positioned in. The side wall surface 40bR functions as a reflection surface for allowing a part of light from the light source 34B to enter the side wall surface 40aL of the through hole 40a. For this reason, the side wall surface 40bR is formed with a predetermined angle with respect to the light irradiation surface 31, for example. The other side wall surface facing the side wall surface 40bR is also formed substantially parallel to the side wall surface 40bR. Further, the side wall surface 40bS formed in the vicinity of the light irradiation unit 31 of the through hole 40b and along the longitudinal direction of the light irradiation unit 31 is separated from the light irradiation unit 31 in the same manner as the side wall surface 40aS of the through hole 40a. It is made to function as a reflective surface for emitting incident light to the light irradiation unit 31 again.

  FIG. 1 is a diagram illustrating a path through which light from the light source 34A, the light source 34B, and the light source 34C reaches the light irradiation unit 31 in the configuration illustrated in FIG. As shown in FIG. 1, the light from the light source 34 </ b> A reaches the light irradiation unit 31 through the light guide plate 35 </ b> A as shown by a dotted line α in the figure, and is reflected along the extending direction in the light irradiation unit 31. By repeating, the light irradiation part 31 is illuminated. In this case, the side wall surface 40bS of the through hole 40b is configured to totally reflect the light incident from the light irradiation unit 31 and to emit the light to the light irradiation unit 31 again. This is because more light is guided to the light irradiation unit 31. The light from the light source 34B has light that reaches the light irradiation part 31 directly through the light guide plate 35B as in the case of the light source 34A (the optical path is omitted in the figure), but is indicated by a dotted line β in the figure. As described above, after being reflected by the side wall surface 40bR of the through hole 40b, the light is further reflected by the side wall surface 40aL of the through hole 40a and reaches the light irradiation unit 31. This is because as much light as possible from the light source 34B is guided to the light irradiating unit 31, and the light is evenly applied to the entire area of the light irradiating unit 31. As in the case of the light source 34A, the light from the light source 34C passes through the light guide plate 35C and directly reaches the light irradiation unit 31 (the optical path is omitted in the figure), but is indicated by a dotted line γ in the figure. As described above, light that is reflected by the side wall surface 40aR of the through hole 40a and reaches the vehicle rear end portion 31Q of the light irradiation unit 31 is also provided. In this way, by configuring a part of the side wall surface 40aR of the through hole 40a in which a part of the light of the light source 34C guided to the light guide 35C is formed in the light guide unit 35 as a reflection surface, the light irradiation unit 31 There is an effect of increasing the amount of light incident on the vehicle rear end portion 31Q. By setting the shape of the through-hole 40a, a part of the side wall surface 40aR of the through-hole 40a can be configured as a reflecting surface, so that the above effect can be realized with a very simple configuration. Note that the side wall surface 40aS of the through hole 40a is configured to totally reflect the light incident from the light irradiation unit 31 and to emit the light to the light irradiation unit 31 again, similarly to the side wall surface 40bS of the through hole 40b.

  In the above-described embodiment, the reflection surface formed inside the light guide portion 35 is configured by the side wall surfaces 40aR and 40bR of the through holes 40a and 40b. However, it is needless to say that not only the through-hole but also a recessed portion having a bottom surface can be formed and the side wall surface of the recessed portion can function as a reflecting surface.

  According to the door mirror lamp according to the embodiment described above, it is possible to increase the amount of light from the light source that is guided to the vehicle rear end of the light irradiating unit, despite the extremely simple configuration.

  In the embodiment described above, two through holes 40 a and 40 b are formed in the light guide portion 35. However, for example, only the through hole 40a may be formed. Moreover, you may make it form only the through-hole 40b, without forming the through-hole 40a. This is because in either configuration, a large amount of light can be conducted to the vehicle rear end portion 31Q of the light irradiation unit 31.

  In the embodiment described above, the number of light sources 34 and the number of light guides 35 corresponding to each light source 34 are three. However, this number is not limited and may be two or three or more.

  As mentioned above, although this invention was demonstrated using embodiment, it cannot be overemphasized that the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiments. Further, it is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

10 ... Door, 11 ... Connector, 20 ... Door mirror, 21 ... Mirror, 22 ... Housing cover, 23 ... Door mirror housing, 24 ... Actuator,
30... Side turn lamp device, 31... Light irradiation part, 31P... One end part of the light irradiation part, 31Q ... other end part (vehicle rear end part) of the light irradiation part, 32. Lower case, 32U ... Upper case, 33 ... Circuit board, 34, 34A, 34B, 34C ... Light source, 35 ... Light guide, 35A, 35B, 35C ... Light guide, 40a, 40b ... Transparent Hole, 40aR, 40aL, 40aS, 40bR, 40bL, 40bS... Side wall surface (reflection surface).

Claims (3)

A light irradiating portion made of a translucent material disposed in a part of a housing cover on the vehicle front side of the door mirror that is built in the door mirror and attached to the vehicle; One end portion is positioned on a front surface portion of the housing cover corresponding to the front of the vehicle, and the other end portion of the light irradiation portion is a door mirror lamp positioned on a side surface portion of the housing cover corresponding to the side of the vehicle. There,
A plurality of light sources arranged side by side along the extending direction of the light irradiation unit;
A light guide unit formed integrally with the light irradiation unit between each light source and the light irradiation unit, and guiding light from each light source to the light irradiation unit,
A through hole or a recessed portion is formed in a portion of the light guide portion adjacent to the light irradiation portion, and light from at least one of the light sources reflects the light using a part of a side wall surface of the through hole or the recessed portion as a reflecting surface. A door mirror lamp configured to be guided to the other end of the irradiation unit.   The side wall surface of the through hole or the recessed portion that guides the light from the light source to the other end of the light irradiating portion has an incident angle of the light from the light source and the light irradiating portion with respect to the direction of the perpendicular. 2. The door mirror lamp according to claim 1, wherein the door mirror lamp is configured by a flat surface having an inclination such that an emission angle emitted to the other end portion is substantially equal.   A plurality of the light-transmitting or recessed portions are arranged in parallel along the longitudinal direction of the light-irradiating portion, and light from at least one light source is adjacent to one of the light-transmitting or recessed portion side wall surfaces. After reflecting a part as a reflecting surface, it is configured to be guided to the light irradiating part by reflecting a part of the side wall surface of the other light-transmitting or recessed part adjacent to the reflecting surface as a reflecting surface. The door mirror lamp according to claim 1.

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