JP2014234019A - Door mirror unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a door mirror unit capable of displaying a mark having a predetermined shape, and having a small body type in a thickness direction.SOLUTION: A door mirror unit 30 has a glass plate 41 and an LED 46 for displaying a mark having a predetermined shape. The glass plate 41 constituting a mirror 31 has a display formation part 44 formed by performing shot blast to part of a rear surface 43 for making rough surface so as to have a predetermined shape. The LED 46 is disposed to face a specific end surface 42 of the glass plate 41. Part of light emitted from the LED 46 is reflected by the display formation part 44 of the glass plate 41 and goes outside. At the time, the display formation part 44 of the glass plate 41 glitters in a predetermined shape. Therefore, the mirror 31, the LED 46, and an electronic circuit board 47 do not overlap in the thickness direction, so that compared with a case that plural members including a light source are disposed on a rear side of the mirror, a body type in the thickness direction becomes small.

Description

  The present invention relates to a door mirror unit used in a door mirror device.

Conventionally, in order to issue a warning to a driver, a door mirror unit that displays a warning mark on a mirror by a light source provided on the back side of the mirror is known.
The door mirror unit disclosed in Patent Document 1 includes a glass plate and a mirror made of a vapor deposition film provided on the back surface thereof, a light source directed to the mirror, and a light diffusion provided between the mirror and the light source. A member. A light transmission part extracted in the form of a warning mark is formed at a position corresponding to the light source in the deposited film. The light emitted from the light source passes through the light diffusing member, the light transmission part of the vapor deposition film, and the glass plate, and exits to the outside.

  The door mirror unit disclosed in Patent Document 2 includes a mirror made of a glass plate and a vapor deposition film provided on the surface thereof, a light source directed to the opposite side of the mirror, and a side opposite to the mirror with respect to the light source. And a reflector. A light transmission part in the form of a warning mark is formed at a position corresponding to the light source in the deposited film. The light emitted from the light source is reflected by the reflector, passes through the glass plate and the light transmission part of the deposited film, and exits to the outside.

JP 2012-192879 A International Publication No. 00/25064

Incidentally, in the door mirror units of Patent Documents 1 and 2, a plurality of members such as a light source and an electronic circuit board on which the light source is mounted are provided so as to overlap in the thickness direction of the mirror. Specifically, in Patent Document 1, a mirror, a light diffusion member, a light source, and an electronic circuit board are provided so as to overlap in the thickness direction of the mirror, and in Patent Document 2, a mirror, a light source, an electronic circuit board, and A reflector is provided so as to overlap in the thickness direction of the mirror. Therefore, the conventional one has a problem that the physique in the thickness direction is large.
The present invention has been made in view of the above points, and an object of the present invention is to provide a door mirror unit capable of displaying a mark having a predetermined shape and having a small physique in the thickness direction.

  The invention according to claim 1 is a door mirror unit that can be used in a door mirror device and can display a mark of a predetermined shape, and is provided on a transparent substrate made of a transparent plate and on the front or back surface of the transparent substrate. A mirror surface forming film, and a light source provided to face the end surface of the transparent substrate. The transparent substrate has a display forming portion formed by roughening a part of the back surface so as to have a predetermined shape. Part of the light emitted from the light source enters the transparent substrate from the end surface of the transparent substrate, is reflected by the display forming unit, and then exits from the surface of the transparent substrate. The display forming part of the transparent substrate shines in a predetermined shape when reflecting light emitted from the light source.

According to the first aspect of the present invention, the mirror made of the transparent substrate and the mirror surface forming film and the light source do not overlap in the thickness direction, and a plurality of members including the light source are stacked in the thickness direction on the back side of the mirror. Compared with the form, the physique in the thickness direction can be reduced. The door mirror unit having a small physique in the thickness direction is advantageous in that it can create a margin in the space on the back side of the door mirror unit, and the degree of freedom of arrangement of, for example, a mirror surface angle adjustment mechanism and an electric storage mechanism is increased.
Moreover, since the transparent substrate which comprises a mirror is utilized as the light guide means for guiding the light emitted from the light source, it is not necessary to separately provide the light guide means. Therefore, the number of parts can be reduced.

The invention according to claim 2 includes an electronic circuit board. The electronic circuit board is mounted with a light source, and is provided on the opposite side of the end surface of the transparent substrate with respect to the light source.
Therefore, since the mirror and the electronic circuit board do not overlap in the thickness direction, the physique in the thickness direction can be reduced.

The invention described in claim 3 includes a mirror holder. The mirror holder has a first holding unit holding a transparent substrate and a second holding unit holding a light source. The second holding part is composed of the same member as the first holding part.
Therefore, the number of parts can be reduced and assembly can be facilitated.

In the invention according to claim 4, the light source is hidden behind the second holding portion of the mirror holder when viewed from the surface side of the transparent substrate.
Therefore, the presence of the light source can be hidden from the outside.

In the invention according to claim 5, the mirror surface forming film is provided on the back surface of the transparent substrate.
Therefore, since the mirror surface forming film is protected by the transparent substrate, the mirror surface forming film is hardly damaged.

According to a sixth aspect of the present invention, the mirror surface forming film has a light transmitting portion that is provided on the surface of the transparent substrate and transmits light reflected by the display forming portion of the transparent substrate. A reflective film is provided on the back surface of the transparent substrate.
Therefore, since the transparent substrate is sandwiched between the mirror surface forming film and the reflective film, the light reflection efficiency in the transparent substrate can be increased. Therefore, the mark can be displayed more clearly on the mirror.

It is a figure which shows the door mirror apparatus with which the door mirror unit by 1st Embodiment of this invention was applied. It is the II-II sectional view taken on the line of FIG. It is the III-III sectional view taken on the line of FIG. It is a figure which shows the place where the triangle mark was displayed on the mirror of FIG. It is sectional drawing of the door mirror unit by 2nd Embodiment of this invention. It is a figure which shows the shape of the display formation part of the glass plate of the door mirror unit by other embodiment of this invention.

Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings. In the embodiments, substantially the same components are denoted by the same reference numerals and description thereof is omitted.
(First embodiment)
FIG. 1 shows a door mirror device to which a door mirror unit according to a first embodiment of the present invention is applied. The door mirror device 10 shown in FIG. 1 is equipped on the door 90 on the right side of the vehicle. The door mirror device mounted on the left door of the vehicle and the door mirror device 10 shown in FIG. 1 have the same configuration except that they are bilaterally symmetric.

  First, the door mirror apparatus 10 is demonstrated based on FIG. 1 and FIG. The door mirror device 10 includes a base 11 fixed to a vehicle door 90, a mirror assembly 12 including a door mirror unit 30, and an electric storage mechanism 13 provided between the base 11 and the mirror assembly 12. Yes.

  The electric storage mechanism 13 includes a shaft 14 fixed to the base 11, a case 15 fixed to the mirror assembly 12, and rotation driving means provided in the case 15. The rotation driving means is composed of, for example, a motor and a speed reducer, and can rotate the case 15 around the shaft 14. The electric storage mechanism 13 can move the mirror assembly 12 between the use position and the storage position by rotating the case 15 around the shaft 14. The mirror assembly 12 of FIG. 1 is in the use position.

  The mirror assembly 12 is attached to the bracket 18, a cup-shaped mirror housing 16 that opens toward the rear of the vehicle when in the use position, a bracket 18 that is fixed to the inner wall of the mirror housing 16 with a screw 17, and the bracket 18. A mirror surface angle adjusting mechanism 19 and a door mirror unit 30 supported by the mirror surface angle adjusting mechanism 19 are provided. The case 15 of the electric storage mechanism 13 is fixed to the bracket 18.

  The door mirror unit 30 is provided inside the opening of the mirror housing 16, and includes a mirror 31 and a mirror holder 32 that holds the mirror 31. The detailed configuration of the door mirror unit 30 will be described later.

  The mirror surface angle adjusting mechanism 19 includes a case 21 fixed to the bracket 18, a pivot 22 that supports the mirror holder 32, and a first output rod 23 and a second output rod 24 that can approach and separate from the mirror holder 32. And drive means provided in the case 21. The driving means is composed of, for example, a motor and a speed reducer, and can reciprocate the first output rod 23 and the second output rod 24 in the axial direction. The mirror surface angle adjusting mechanism 19 can rotate the mirror holder 32 around the vertical axis passing through the tip of the pivot 22 by moving the first output rod 23 in the axial direction. Further, the mirror surface angle adjusting mechanism 19 can rotate the mirror holder 32 around the horizontal axis passing through the tip of the pivot 22 by moving the second output rod 24 in the axial direction.

  Next, a detailed configuration of the door mirror unit 30 will be described with reference to FIGS. The door mirror unit 30 includes a glass plate 41, a mirror surface forming film 45, an LED 46, an electronic circuit board 47, and a mirror holder 32.

  As shown in FIG. 2, the glass plate 41 is disposed in the opening of the mirror housing 16. As shown in FIG. 1, in the present embodiment, the glass plate 41 has a rectangular shape with the upper right corner cut when viewed from the rear of the vehicle with the mirror assembly 12 positioned at the use position. Is formed. Hereinafter, the upper right corner of the end surface of the glass plate 41 is referred to as a specific end surface 42.

  As shown in FIG. 3, the glass plate 41 has a display forming part 44 formed by roughening a part of the back surface 43 by shot blasting so as to follow a predetermined shape. As shown in FIG. 1, in this embodiment, the display formation part 44 is located in the vicinity of the specific end surface 42, and is formed in the triangle. The glass plate 41 corresponds to a “transparent substrate” recited in the claims.

  As shown in FIG. 3, the mirror surface forming film 45 is a deposited film deposited on the back surface 43 of the glass plate 41 and constitutes the mirror 31 together with the glass plate 41. In the present embodiment, the mirror surface forming film 45 is prevented from being formed on the specific end surface 42 by performing vapor deposition while the specific end surface 42 of the glass plate 41 is masked.

  The LED 46 is provided so as to face the specific end face 42 of the glass plate 41, is mounted on the electronic circuit board 47, and emits light when both terminals are energized. The LED 46 corresponds to a “light source” recited in the claims.

  The mirror holder 32 includes a first holding part 48 that holds the mirror 31 and a second holding part 49 that holds the LED 46 and the electronic circuit board 47. The first holding part 48 and the second holding part 49 of the mirror holder 32 are composed of the same member. The first holding portion 48 of the mirror holder 32 is locked to the peripheral edge portion of the surface 39 of the glass plate 41 while covering the back side of the mirror 31. The second holding part 49 of the mirror holder 32 accommodates the LED 46 and the electronic circuit board 47. The LED 46 is hidden behind the second holding part 49 when viewed from the front surface 39 side of the glass plate 41. The second holding part 49 of the mirror holder 32 functions as a cover for the LED 46.

  In the door mirror unit 30 configured as described above, when the LED 46 emits light, a part of the light enters the glass plate 41 from the specific end surface 42 of the glass plate 41 and is reflected by the display forming unit 44. The light is emitted from the surface 39 of the glass plate 41. At this time, the glass plate 41 functions as a light guide member, and the mirror surface forming film 45 functions as a reflection film for increasing the light reflection efficiency in the glass plate 41. The display forming part 44 of the glass plate 41 shines in a triangle when the light emitted from the LED 46 is reflected. In this way, the door mirror unit 30 can display a triangular mark on the mirror 31 as shown in FIG. In the present embodiment, the triangular mark is used as a warning mark for notifying the driver of the presence of a vehicle approaching from behind the adjacent lane of the own vehicle.

  As described above, the door mirror unit 30 according to the first embodiment includes the glass plate 41 and the LED 46 in order to display a triangular mark. The glass plate 41 has a display forming portion 44 formed by roughening a part of the back surface 43 by shot blasting so as to form a triangle. The LED 46 is provided so as to face the specific end face 42 of the glass plate 41. Part of the light emitted from the LED 46 is reflected by the display forming portion 44 of the glass plate 41 and goes out. At this time, the display forming part 44 of the glass plate 41 shines in a triangle.

  Therefore, according to the first embodiment, the mirror 31, the LED 46, and the electronic circuit board 47 do not overlap with each other in the thickness direction, and a plurality of members including the light source are overlapped in the thickness direction on the back side of the mirror. And the physique of thickness direction can be made small. The door mirror unit 30 having a small physique in the thickness direction is advantageous in that it can create a margin in the space on the back side of the door mirror unit 30 and the degree of freedom in arrangement of the mirror surface angle adjusting mechanism 19 and the electric storage mechanism 13 is increased. is there.

  In the first embodiment, the second holding portion 49 of the mirror holder 32 that holds the LED 46 and the electronic circuit board 47 is composed of the same member as the first holding portion 48 of the mirror holder 32 that holds the mirror 31. Yes. Therefore, the number of parts can be reduced and assembly can be facilitated.

  In the first embodiment, the LED 46 is hidden behind the second holding part 49 of the mirror holder 32 when viewed from the surface 39 side of the glass plate 41. Therefore, the presence of the LED 46 can be hidden from the outside.

(Second Embodiment)
A door mirror unit according to a second embodiment of the present invention will be described with reference to FIG. The door mirror unit 50 includes a mirror surface forming film 51 instead of the mirror surface forming film 45 in the first embodiment, and further includes a reflective film 53.

  The mirror surface forming film 51 is a deposited film deposited on the surface 39 of the glass plate 41, and constitutes a mirror 52 together with the glass plate 41. The mirror surface forming film 51 has a light transmitting portion 54 that transmits the light reflected by the display forming portion 44 of the glass plate 41. The reflection film 53 is a deposited film deposited on the back surface 43 of the glass plate 41.

  In the door mirror unit 50 configured as described above, when the LED 46 emits light, a part of the light enters the glass plate 41 from the specific end surface 42 of the glass plate 41 and is reflected by the display forming unit 44. The light is emitted from the surface 39 of the glass plate 41, passes through the light transmission part 54 of the mirror surface forming film 51, and goes outside. The display forming part 44 of the glass plate 41 shines in a triangle when the light emitted from the LED 46 is reflected. In this way, the door mirror unit 30 can display a triangular mark.

According to the second embodiment, as in the first embodiment, the mirror 52, the LED 46, and the electronic circuit board 47 do not overlap with each other in the thickness direction, so that the physique in the thickness direction can be reduced.
In the second embodiment, since the glass plate 41 is sandwiched between the mirror surface forming film 51 and the reflective film 53, the light reflection efficiency in the glass plate 41 can be increased. Therefore, the mark can be displayed more clearly on the mirror 31.

(Other embodiments)
In other embodiment of this invention, the shape of the display formation part of a glass plate is not restricted to a triangle, Other shapes may be sufficient. For example, an ISO standard side vehicle detection symbol as shown in FIG. 5 may be used.
In another embodiment of the present invention, the display forming part of the glass plate is not limited to a warning mark for notifying the driver of the presence of a vehicle approaching from behind the adjacent lane of the own vehicle, but may be a mark for other purposes. May be.
In other embodiment of this invention, the display formation part of a glass plate may be formed not only by shot blasting but by another method. In short, the back surface of the glass plate may be roughened.
In other embodiment of this invention, the display formation part of a glass plate may be comprised by the line marking or the dot marking.

In another embodiment of the present invention, the shape of the glass plate is not limited to a rectangular shape, and may be another shape such as an elliptical shape or a circular shape.
In another embodiment of the present invention, for example, a transparent resin plate may be provided instead of the glass plate.
In another embodiment of the present invention, the mirror may be composed of a half mirror having a predetermined transmittance.
In another embodiment of the present invention, the mirror surface forming film is not limited to vapor deposition, and may be formed by, for example, painting or plating.
In another embodiment of the present invention, the mirror surface forming film may be a single layer or a multilayer.
In another embodiment of the present invention, the light transmission part of the mirror surface forming film may be composed of a half mirror having a predetermined transmittance.

In another embodiment of the present invention, after the mirror surface forming film is formed on the glass plate, the specific end surface may be formed by polishing a part of the end surface of the glass plate.
In another embodiment of the present invention, the light source may be provided at any position around the glass plate.
In another embodiment of the present invention, the number of light sources is not limited to one, and a plurality of light sources may be provided. When a plurality of light sources are provided, it is preferable that each light source is directed to the display forming part of the glass plate.
In another embodiment of the present invention, the light source is not limited to an LED, and may be composed of, for example, a light bulb or an EL element.
In other embodiments of the present invention, the electronic circuit board is not necessarily provided. The electronic circuit board may be a rigid type or a flexible type.
The present invention is not limited to the embodiments described above, and can be implemented in various forms without departing from the spirit of the invention.

DESCRIPTION OF SYMBOLS 10 ... Door mirror apparatus 30, 50 ... Door mirror unit 39 ... Surface 41 ... Glass plate (transparent substrate)
42 ... Specific end face (end face)
43 ... Back 44 ... Display forming part 45, 51 ... Mirror surface forming film 46 ... LED (light source)

Claims (6)

A door mirror unit (30, 50) used for a door mirror device (10) and capable of displaying a mark of a predetermined shape,
A transparent substrate (41) having a display forming part (44) formed of a transparent plate material and formed by roughening a part of the back surface (43) to follow the predetermined shape;
A mirror surface forming film (45, 51) provided on the front surface (39) or the back surface of the transparent substrate;
A light source (46) provided to face the end surface (42) of the transparent substrate;
With
A part of the light emitted from the light source enters the transparent substrate from the end face of the transparent substrate and is reflected by the display forming unit, and then exits from the surface of the transparent substrate.
The display mirror of the transparent substrate shines in the predetermined shape when reflecting light emitted from the light source. An electronic circuit board (47) on which the light source is mounted;
2. The door mirror unit according to claim 1, wherein the electronic circuit board is provided on a side opposite to the end face of the transparent substrate with respect to the light source.   A mirror holder having a first holding part (48) holding the transparent substrate and a second holding part (49) made of the same member as the first holding part and holding the light source ( The door mirror unit according to claim 1 or 2, further comprising: 32).   The door mirror unit according to claim 3, wherein the light source is hidden behind the second holding portion of the mirror holder when viewed from the front surface side of the transparent substrate.   The door mirror unit (30) according to any one of claims 1 to 4, wherein the mirror surface forming film is provided on the back surface of the transparent substrate. The mirror surface forming film is provided on the surface of the transparent substrate, and has a light transmission part (54) that transmits light reflected by the display formation part of the transparent substrate,
The door mirror unit (50) according to any one of claims 1 to 4, further comprising a reflective film (53) provided on the back surface of the transparent substrate.

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