JPS60236848A - Multistage reflection reducing device of inner mirror - Google Patents

Abstract

PURPOSE:To allow multistage change of reflectance by providing three or four plane mirrors having different reflectances or colors and each attached to a surface of a mirror holder having a structure of regular triangle or square in cross section. CONSTITUTION:A mirror holder 3 is a prism structure of regular triangle in cross section and has surfaces each of which firmly carries one of plane mirrors 4A to 4C having different reflectances or colors. A magnet 7 of a nonmagnetic material is attached through a fitting member 6 to each of the vertexes of the triangle which define the outermost circumference of the mirror holder 3 when rotated. There are provided rotary shafts 5A, 5B projecting from the opposite side surfaces 3d, 3e of the mirror holder 3 at the respective centers of gravity of the regular triangles, and the shafts are rotatably fitted in bearing holes 2d of a mirror housing 2. A gear 8 rotatingly driven by a motor 10 is firmly secured to the shaft 5A so as to rotate the mirror holder 3.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a multi-stage anti-glare device for an interior mirror, and more specifically, for an interior mirror installed in the front of a vehicle interior, the reflectance of the mirror can be adjusted during the day and at night. This allows for manual or automatic switching in multiple stages.

Traditionally, this type of anti-glare mirror uses a prism mirror and the mirror is switched at a fixed angle using a motor or magnet, but the cost of the prism mirror itself is high, and the taper angle of the prism If the switching angle does not match the driver's eye point, part of the daytime or nighttime reflective surface will be visible on the upper or lower side, making it difficult to see. Furthermore, since the system has two levels of switching between daytime and nighttime, there is also the problem that it is not possible to select the brightness between daytime and nighttime.

Purpose of the Invention The present invention aims to solve the above-mentioned conventional problems, and instead of using an expensive prism mirror, three or four plane mirrors with different reflectances or colors are used, and the cross section is an equilateral triangle or square. The mirror holder is attached to each surface of a mirror holder formed in such a manner that the reflectance can be arbitrarily selected in multiple stages by rotating the mirror holder.

Structure and operation of the invention This invention was made to achieve the above-mentioned object, and consists of three or four plane mirrors each having a different reflectance or color on each surface of a mirror holder having a regular triangular or square cross section. The rotating shaft is provided at the center of gravity of the equilateral triangle or square at both ends of the mirror holder in the longitudinal direction, and the rotating shaft is supported on the inner surface of the vertical portions of both sides of the mirror housing, which is formed in the shape of a front road. Furthermore, a drive gear that rotates in mesh with a motor gear attached to the output shaft of a motor housed in the mirror housing is attached to one of the rotating shafts, and the horizontal part of the mirror housing and the rotating outermost periphery of the mirror holder are attached. A mirror stop position detection switch means for detecting whether one of the plane mirrors is vertical is provided between the mirror stop position detection switch means and a manual switch or a light receiving element that receives the intensity of light entering the vehicle interior in parallel with the switch means. The present invention is characterized in that a circuit equipped with an automatic switch that discriminates and switches is provided, and the circuit drives the motor to rotate the mirror at a pitch of 90° or 120°, thereby switching the reflectance or color of the mirror. This invention provides a multi-stage anti-glare device for an inner mirror.

Furthermore, in the above-described device, an idle gear is interposed between the motor gear and the drive gear, at least one of the motor gear, the eye gear, and the drive gear is made of elastomer material, and the mirror holder is manually operated. To provide a multi-stage anti-glare device for an inner mirror, which is characterized in that it can be moved without rotating a motor even when rotated.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to embodiments shown in the drawings.

In the first embodiment shown in FIGS. 1 to 4, 1 is a stay for attaching an inner mirror to a vehicle body, 2 is a mirror housing, 3 is a mirror holder, and 4A, 4B, and 4C are plane mirrors that are attached to the mirror holder 3.

As shown in FIG. 2, the mirror holder 3 consists of a column with an equilateral triangular cross section, each of its surfaces 3 at 3 b.

The plane mirrors 4A, 4B, and 4C are fixed to the mirror 3c. The plane mirrors 4A, 4B, and 4C have different reflectances or colors. In addition, at each vertex of the triangle that is the outermost rotational periphery of the mirror holder 3, there is a space between the adjacent plane mirrors.
The magnet 7 is attached via a mounting member 6 made of a non-electromagnetic material. Both end surfaces 3 in the longitudinal direction of the mirror holder 3
The rotation axis 5A is located at the center of gravity of the above equilateral triangle of cl, 3e.
, 5B are installed protrudingly.

The mirror housing 2 has a front-side shape and is composed of an upper horizontal portion 2a and vertical left and right side portions 2b, 2c, and the rotating shafts 5A, 5B are rotatably fitted into the inner surfaces of the left and right side portions 2b, 2c. There are matching bearing holes 2d, 2d. One side portion 2b is hollow, and a rotary shaft 5A that fits into the bearing hole 2d protrudes into the hollow, and the drive gear 8 is fixed to the protrusion. The horizontal part 2a of the mirror housing 2 has an arcuate lower surface to allow rotation of the mirror holder 3, and is hollow inside, with a spherical part 1a of the stay 1 in the center thereof.
It has a spherical bearing part 2'' which is fitted in such a way that it can be tilted freely.

Further, a motor 10 is housed in a hollow portion on the negative side, and a motor gear I2 is fixed to an output shaft 11 of the motor 10. The motor gear 12 meshes with an idle gear 13 rotatably attached to a support shaft 2e protruding from an inner wall in a hollow portion of the vertical side portion 2b, and the idle gear 13 meshes with the drive gear 8. The motor 10 is connected to a lead wire 14 wired from the vehicle body through a hole 1b formed along the axis of the stay 1, and when the motor 10 is driven, the drive gear 8 rotates via the motor gear 12 and the idle gear 13. , the mirror holder 3 is rotated. The idle gear 13 is made of an elastomer material and allows the mirror holder 3 to be rotated manually without being driven by the motor 10. Incidentally, instead of the idle gear 13, the motor gear 12 or the drive gear 8 may be formed of an elastomer material.

In the hollow part on the other side of the horizontal part 2a of the mirror housing 2,
A reed switch 15 is provided as a mirror stop position detection switch that is opened and closed by the magnet 7, and when the magnet 7 comes to a position facing the reed switch 15, the reed switch 15 is turned off.

In addition, at the bottom of the vertical side 2C of the mirror housing 2,
A light receiving element 16 for detecting the intensity of light entering the vehicle interior is attached, and a manual switch 17 is attached to the surface of the horizontal portion 2a of the mirror housing 2.

The motor 10 is driven when the manual switch 17 is turned on, and is also driven automatically according to the intensity of light entering the vehicle interior received by the light receiving element 16, and is stopped by the reed switch 15 of the mirror stop position detection switch. I have to. That is, a printed board 18 equipped with a circuit shown in FIG. 4 is provided within the horizontal portion 2a of the mirror housing 2. A motor 10, a power supply 21 inside the vehicle body, a manual switch 17, and a light receiving element 16 are connected to the circuit, and a discrimination circuit 22 that discriminates a detection signal from the light receiving element 16, and a motor drive operated by a signal from a discrimination side path 22 are connected. circuit 23, and manual/
An automatic changeover switch 20 is provided. A drive stop circuit with a reed switch 15 interposed between the power source 21 and the motor 10, a manual drive circuit with a manual switch 17, a light receiving element 16, a discrimination circuit 22, and a motor drive circuit 23.
A drive circuit for selectively connecting the contact 20a of the switch 20 to the contacts 20b and 20c is provided in parallel.

Next, to explain the reflectance switching function of the inner mirror having the above structure, when the manual switch 17 is turned on, or when the light receiving element 16 detects the intensity of light entering the vehicle interior, the reflectance is switched by the discrimination circuit 22. When the signal is given, motor 10
is driven. The drive gear 8 rotates via the motor gear 12 and the idle gear 13 due to the drive of the motor 10, and the rotating shaft 5A rotates together, so that the mirror holder 3 rotates around the rotating shafts 5A and 5B located at the center of gravity. I will do it. The mirror holder 3 has one vertex located below the surface end of the second horizontal portion 2a of the mirror housing 2, the magnet 7 at the vertex facing the reed switch 15, and one plane mirror 4A vertically facing the surface. It is located at a stop position and rotates from the stop position. When the mirror holder 3 rotates 12o' in the direction of the arrow, the adjacent vertex on the delayed side of the rotation comes to a position facing the reed switch 15, and the reed switch 15 is turned off by the magnet 7 at the vertex, and the motor 10 is turned off. rotation stops. At this time, the plane mirror 4C stops vertically at the surface position. The plane mirror 4C and the plane mirror 4A have different reflectances or colors, and the anti-glare effect can be switched. In addition, in the case of automatic drive, the angle determined according to the incident light intensity is rotated, and the
Rotate 0° or 240° and stop.

Since the idle gear 13 is made of an elastomer material, the mirror holder 3 is not driven by the motor 10.
You can also rotate it manually by holding it.

The present invention is not limited to the above embodiment, but as in the second embodiment shown in FIGS. 5 and 6, the mirror holder 3' is formed to have a square cross section, and each surface has a reflectance or a color. Plane mirrors 4A and 4B.

4C, 4D may be installed, and in that case, the stages can be switched to four stages. Note that the other configurations are the same as those of the first embodiment, so the same numbers are given and explanations are omitted.

As is clear from the above explanation, according to the device according to the present invention, by using a plurality of inexpensive plane mirrors with different reflectances or colors, without using an expensive prism mirror, The reflectance can be switched in multiple stages. Therefore, the reflectance of the mirror can be changed depending on the brightness of daytime, nighttime, and intermediate brightness, which has the advantage of making it very easy to see. In addition, the switching can be done by a manual switch or automatically driven by a motor depending on the intensity of the light, and the mirror holder can also be held and rotated by hand, offering various advantages such as ease of use. It is something that you have.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional front view of main parts showing a first embodiment of the present invention;
2 is a sectional view taken along line ll-Tl in FIG. 1, FIG. 3 is a sectional view taken along line III-IIITl in FIG. 1, FIG. 4 is a circuit diagram, and FIG. 5 is a sectional front view of main parts of the second embodiment. Figure 6 is VI- of Figure 5.
It is a sectional view taken along the Vl line. 1... Stay, 2... Mirror housing, 2a...
・Horizontal part, 21+, 2c...Vertical side part, tail...Mirror holder, 4A, 4B, 4C, 4D...Plane mirror, 5A
, 5B... Rotating shaft, 7... Magnet, End... Drive gear, 10... Motor, 12... Motor gear, 13... Idle gear, 15... Reed switch, 16... - Light receiving element, 17...manual switch.

Claims (2)

[Claims] (1) 3 or 4 sheets with different reflectance or color
A plane mirror is placed on each surface of a mirror holder whose cross section is an equilateral triangle or square, and a rotation axis is provided at the center of gravity of the equilateral triangle or square at both ends of the mirror holder in the direction of the technician. The rotating shaft is supported on the inner surfaces of both vertical parts of the mirror housing formed in the front shape, and a drive gear that rotates by meshing with a motor gear attached to the output shaft of a motor housed in the mirror housing is mounted on the rotating shaft. A mirror stop position inspection switch means is provided between the horizontal part of the mirror housing and the rotating outermost peripheral part of the mirror holder for detecting which of the plane mirrors is vertical; A circuit equipped with a manual switch or an automatic switch that receives and discriminates the intensity of light entering the single room with a light receiving element is provided in parallel with the means, and the circuit drives the motor to rotate the mirror at 90° or 120°. A multi-stage anti-glare device for an inner mirror, characterized in that the reflectance or color of the mirror can be changed by rotating it with a pitch. (2) In the device according to claim (1) above,
An idle gear is interposed between the motor gear and the drive gear, and the motor gear and the idle gear. A multi-stage anti-glare device for an inner mirror, characterized in that at least one of the drive gears is made of an elastomer material, and the mirror holder can be moved manually without rotation of a motor.