KR20010028186A - Sideview mirror for vehicle - Google Patents

Abstract

The present invention relates to a rearview mirror for a vehicle, comprising: a housing coupled to a front region of a driver's seat so that an opening formed at one side faces an outer rear region of the vehicle and an opening formed at the other side faces an inner side of the vehicle; At least one objective lens refracting the converged light to converge, an upper reflecting unit reflecting light passing through the horizontal center line of the objective lens, and a mutual internal contact angle with the upper reflecting unit at a right angle An objective lens system disposed to correspond to a horizontal center line of the objective lens and having a lower reflecting unit reflecting light passing through a lower side of the horizontal center line of the objective lens; A third reflection part disposed after the focal length of the objective lens to reflect the light reflected by the upper and lower reflection parts to an inner opening area of the housing, and coupled to the inner opening area of the housing; And an alternative lens system having at least one alternative lens for expanding and refracting the light reflected by the trireflector to a predetermined unit magnification. As a result, the object in the side rear region of the vehicle can be observed accurately and easily without being distorted.

Description

Car rearview mirror {SIDEVIEW MIRROR FOR VEHICLE}

The present invention relates to a rearview mirror for a vehicle, and more particularly, allows the driver to accurately and easily observe objects in the rear and rear of the vehicle with respect to the direction of travel of the vehicle, and protrudes inside the vehicle at the same time. A rearview mirror for a vehicle capable of shortening the protruding length of the housing.

A vehicle is generally equipped with a pair of sideview mirrors in front of the driver's seat and the driver's seat so that the driver can observe the rear and rear of the vehicle in the direction of travel.

Conventional vehicle rearview mirrors are all "planar reflectors" type having reflecting surfaces that are almost flat, and protrude horizontally with respect to the front and rear axis of the vehicle body on the outside of the vehicle, causing air resistance. Such air resistance not only increases fuel consumption of the vehicle but also causes problems such as air pollution.

In addition, such a planar reflector type rearview mirror has a relatively small rear and rear projection angle, and in the case of snow or rain, water droplets, moisture, or frost may contact or condense on the surface of the planar reflector, thus making it difficult to rearview. have.

In consideration of such a problem, the protruding length that protrudes to the outside of the vehicle can be reduced, and the rear view mirror for the vehicle using the optical element can increase the angle of rear observation, PCT Application No. PCT / SE96 / 00439 and US Patent No. US 5,559,640, respectively.

In the case of the PC rearview mirror, the four lenses are arranged along the vertical direction of the vehicle, and two reflectors are arranged between the lenses, so that the optical axes are not easily matched due to the vibration of the vehicle. In addition, the 'screen' (lens) that allows the driver to observe the rear of the vehicle is installed in the lower area of the so-called 'A Pillar' of the vehicle, so the configuration and installation are complicated and practically not practically used. It is true.

In addition, the US patent vehicle rearview mirror, a relatively small convex mirror on the outside of the vehicle and a magnifying glass between the convex lens and the driver so that the rear view can be seen, the upper and lower and left and right directions of the magnifying glass in the driver's view There is a problem that it is severely distorted so that it cannot fully function as a rearview mirror for a vehicle.

Meanwhile, a 'vehicle rearview mirror' for solving such a conventional problem is disclosed in Korean Utility Model Publication No. 76588 and US Patent Publication No. 5,264,962 by the present applicant.

The vehicle rearview mirror of the applicant's name includes two lens groups, an objective lens system, an alternative lens system, and one planar reflector interposed therebetween, so that a relatively wide field of view and relative angle to the rear and rear of the vehicle The rear region can be easily observed with a short optical axis distance.

However, in such a conventional rearview mirror for a vehicle, when the image incident to the objective lens system and the image passing through the alternative lens system are to be enlarged at almost the same magnification (Unit Magnification), the internal protrusion length of the housing increases. There is this. In particular, the housing installed adjacent to the driver's seat side is not easy to match the driver's line of sight and the axis of the alternative lens system, there is a problem that it is not easy to secure a sufficient driving space when increasing the internal projection length.

Accordingly, an object of the present invention is to provide a rearview mirror for a vehicle that can accurately and easily observe the rear and rear regions of the vehicle with little distortion, and shorten the protruding length of the housing that protrudes into the vehicle.

1 is a cross-sectional view of a rearview mirror for a vehicle according to an embodiment of the present invention;

2 is an enlarged view illustrating main parts of FIG. 1;

3 is a perspective view showing the arrangement of the optical element of FIG.

4 is a view illustrating an optical path corresponding to a center line in a vertical direction of the objective lens system of FIG. 1;

5 is a view illustrating a state of use of the vehicle rearview mirror of FIG. 1.

Explanation of symbols on the main parts of the drawings

3: housing 5: exterior part

6,8 spherical part 7: inner tube part

11: objective lens 13: upper reflector

15: lower reflector 17: third reflector

19: Alternative lens 23: External duct

24: internal duct 25: air intake

27: air guide tube 33: filter member

35: blower 37: heater coil

According to the present invention, the housing is coupled to the front region of the driver's seat so that the opening formed on one side toward the outer rear region of the vehicle and the opening formed on the other side toward the inside of the vehicle; At least one objective lens refracting the converged light to converge, an upper reflecting unit reflecting light passing through the horizontal center line of the objective lens, and a mutual internal contact angle with the upper reflecting unit at a right angle An objective lens system disposed to correspond to a horizontal center line of the objective lens and having a lower reflecting unit reflecting light passing through a lower side of the horizontal center line of the objective lens; A third reflection part disposed after the focal length of the objective lens and reflecting light reflected by the upper and lower reflection parts to an inner opening area of the housing, and at least one coupled to an inner opening area of the housing; And an alternative lens system for expanding and refracting the light reflected by the third reflecting unit to have a predetermined unit magnification with the alternative lens of.

Here, the upper reflection portion and the lower reflection portion is preferably an amish type prism formed integrally with each other.

The objective lens, the upper reflecting portion and the lower reflecting portion may be composed of an amish-type prism formed integrally with each other.

Preferably, the third reflecting portion is formed of a planar reflector.

It is effective to form the third reflector and the alternative lens integrally with each other.

In addition, it is preferable that the third reflecting portion be composed of a prism.

The alternative lens is effectively composed of a flat convex lens disposed in the inner opening region of the housing, and a convex convex lens disposed between the flat convex lens and the third reflecting portion.

The housing preferably includes an exterior portion coupled to the vehicle such that a spherical portion formed at one end thereof is exposed to the inside of the vehicle, and an inner tube portion pivotably coupled to the spherical portion.

And, the air inlet is formed on one side and the outer duct coupled to surround the exterior portion, and further comprises a first branch pipe for guiding the air introduced into the outer duct through the air inlet to the surface of the objective lens It is effective to construct.

An inner duct whose one end is in communication with the outer duct and coupled to surround the inner tube portion, and the air branched from the first branch pipe and introduced through the air inlet to the surface of the alternative lens disposed at the outermost portion of the housing; It is preferable to further include a guiding second branch pipe.

And a heating means disposed in the flow path of the air introduced through the air inlet, and configured to heat the air, wherein the blower is disposed in the external duct to allow air from the outside into the external duct through the air inlet. It is effective to include more.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the present invention.

1 is a cross-sectional view of a rearview mirror for a vehicle according to an embodiment of the present invention. As shown in this figure, the vehicle rearview mirror 2 includes the vehicle 1 such that the opening formed at one end faces the side rear region of the vehicle 1 and the opening formed at the other end faces the inside of the vehicle 1. A housing 3 made of a tubular member coupled to the front region of the driver's seat, an objective lens system disposed in the outer opening region of the housing 3 and refracting to converge the light of the side rear region of the vehicle 1; An alternative lens system disposed in the front region of the objective lens system along the direction of travel of the optical axis L _PC passing through the lens system and expanding and refracting the light passing through the objective lens system to a predetermined unit magnification, and a housing 3 It is disposed in the circumferential region of) and has an air supply unit for providing air from the outside to the objective lens system and the alternative lens system.

The housing 3 includes an exterior portion 5 coupled to the vehicle 1 such that an opening formed at one end thereof faces the side rear region of the vehicle 1 and the other end protrudes inside the vehicle 1. It has an inner tube portion 7 which is in communication with 5 and which is pivotally coupled to the outer portion 5. A spherical part 6 is formed inside the end of the exterior part 5 arranged to protrude inside the vehicle 1, and the spherical part 8 of the inner tube part 7 is formed in the spherical part 6. It is pivotally receptively coupled.

The air supply part has an air inlet 25 extending to face the opening of the exterior part 5 so that air can be introduced from the outside, and the exterior part 5 is spaced apart from the exterior part 5 for air supply. ) And an inner duct 24 coupled to surround the end region of the inner tube part 7 at an interval for air supply between the outer duct 23 and the inner duct part 7.

Inside the outer duct 23 is provided an opening and closing device (not shown) to open and close the air inlet 25, the air guide pipe 27 to form a flow path of air is coupled. The first branch pipe 29 and the second branch pipe 31 are respectively coupled to the end of the air guide tube 27 to supply the air introduced through the air inlet 25 to the objective lens system and the alternative lens system.

The first branch pipe 29 is disposed in the shape of a coil in the circumferential region of the exterior portion 5, and an end thereof is fixed to the surface of the objective lens 11 disposed at the outermost portion so that air can be injected. The second branch pipe 31 is disposed in the shape of a coil in the circumferential region of the inner tube portion 7, and an end portion of the second branch pipe 31 may blow air to the surface of the alternative lens 19 disposed at the outermost portion of the inner tube portion 7. It is fixed.

On the other hand, the inside of the air guide tube 27 is disposed in the transverse direction with respect to the flow path of the air filter member 33 is coupled to block foreign substances in the air introduced from the outside, the filter member 33 of the In the rear region, a blower 35 is provided to supply air to the alternative lens system and the objective lens system through the air supply pipes 29 and 31. A heater coil 37 is provided on the downstream side of the blower 35 along the flow direction of the air so as to heat the air introduced from the outside. Here, the heater coil 37 may be disposed upstream of the blower 35.

2 is an enlarged view illustrating main parts of the rearview mirror of the vehicle of FIG. 1, FIG. 3 is a perspective view illustrating an arrangement state of the optical element of FIG. 2, and FIG. FIG. 5 is a view illustrating a state of use of the vehicle rearview mirror of FIG. 1. As shown in these figures, the objective lens system is disposed inside the exterior portion 5, and has a light transmitting member for refracting and reflecting the image of the side rear region of the vehicle 1 to converge to the inside of the vehicle 1 ( Has 9).

The light transmitting member 9 is disposed within the focal length of the convex lens type objective lens 11 and the objective lens 11 that refracts so that the transmitted light converges, and passes through an image side of the horizontal center line of the objective lens 11. The upper reflecting portion 13 reflecting a light, the upper reflecting portion 13 and the inner angle are perpendicular to each other and disposed within the focal length of the objective lens 11 so that the mutual contact line corresponds to the horizontal center line of the objective lens 11. The lower reflector 15 reflecting light passing through the lower region of the horizontal center line of the objective lens 11 is formed of a so-called Amish type prism.

The alternative lens system includes a convex lens-type alternative lens 19 which is arranged in the inner opening region of the inner tube portion 7 and expands and refractes the light passing through at a unit magnification, and between the light transmitting member 9 and the alternative lens 19. It is composed of a third reflecting portion 17 disposed between and reflecting the image provided from the light transmitting member 9 to the alternative lens 19.

Here, as shown in FIG. 4, the third reflector 17 may allow the optical paths L _PL and L _PR reflected by the upper reflector 13 and the lower reflector 15 to cross each other. It is composed of a planar reflector arranged after the focal length of the objective lens 11, and may be constituted by a prism. The alternative lens 19 is composed of a single convex lens, but if the distance from the driver is relatively large, such as when the rearview mirror 2 for the vehicle is installed in the passenger seat, The planar convex lens (PLANO-CONVEX LENS) may be installed at the outermost part of the tube portion 7 and the concave-convex lens (CONCAVE-CONVEX LENS) may be provided between the flat convex lens and the third reflecting portion 17.

By such a configuration, when the image of the object in the side rear region of the vehicle 1 to which the housing 3 is coupled passes through the objective lens 11, the upper reflection portion 13 is formed at the horizontal center line of the objective lens 11. The image incident through the upper region is reflected to the lower reflector 15 with a reflection angle corresponding to the incident angle, and the lower reflector 15 is reflected upwardly to the third reflector 17. At the same time, the lower reflection portion 15 reflects the image incident through the lower region of the horizontal center line of the objective lens 11 to the upper reflection portion 13 with a predetermined reflection angle, and the upper reflection portion 13 has the incident angle. The reflection angle is reflected downward to the third reflector 17.

Accordingly, the images reflected by the upper reflecting portion 13 and the lower reflecting portion 15 cross each other at the focal point of the objective lens 11 to form the image on the third reflecting portion 17 in a state where left and right are corrected. This is done.

The image reflected by the third reflector 17 is enlarged at a unit magnification through the alternative lens 19, so that the driver can observe the object in the lateral rear region accurately and easily without distortion.

On the other hand, when water droplets or frost is caught on the surface of the objective lens 11 or the alternative lens 19, when the air inlet 25 is opened by the opening and closing device (not shown), the outside air into the inside of the air guide tube 27 Is introduced. Air introduced into the air guide tube 27 is filtered while passing through the filter member 33, and the surface of the objective lens 11 and the alternative through the first branch pipe 29 and the second branch pipe 31. Sprayed to the surface of the lens 19, respectively, to remove water droplets or frost on each surface of the objective lens 11 and the alternative lens 19.

When the vehicle 1 is stopped, air is supplied to the blower 35 to supply air from the outside, and the introduced air is supplied to the objective lens 11 and the alternative lens 19 through the branch pipes 29 and 31. Allow to be sprayed onto the surface. When freezing occurs on the surface of the objective lens 11 such as in winter when the outside air temperature is relatively low, power is supplied to the heater coil 37 to heat the air, and the heated air is applied to the objective lens 11. By spraying on the surface, the freezing state of the surface can be easily solved.

In the above-described and illustrated embodiments, the case where the optical axis L _PC passing through the objective lens 11 is substantially parallel to the axis L _VC of the vehicle 1 is described as an example, but the housing 3 Of course, the inner tube portion 7 of the driver's seat may be configured to face the driver's line of sight and the alternative lens 19, the alternative lens 19 can be installed, of course.

In the above-described and illustrated embodiments, the case where the objective lens 11, the upper reflection portion 13, and the lower reflection portion 15 are integrally described is described as an example. However, the objective lens 11 and the upper reflection are described. The unit 13 and the lower reflecting unit 15 may be separately configured, and the upper reflecting unit 13 and the lower reflecting unit 15 may be integrally formed, and the objective lens 11 separately formed on one side thereof may be disposed. It may be.

In the above-described and illustrated embodiments, the third reflector 17 and the alternative lens 19 are separately described and described, but the third reflector 17 and the alternative lens 19 may be configured to be integrally formed with each other. have.

As described above, according to the present invention, the upper reflector, the lower reflector and the third reflector are disposed between the objective lens and the alternative lens, so that the driver hardly distorts the objects in the rear and rear of the vehicle with respect to the traveling direction of the vehicle. A rearview mirror for a vehicle is provided that allows for accurate and easy observation and at the same time shortens the projecting length of the housing projecting inside the vehicle.

In addition, the rearview mirror for a vehicle according to the present invention is relatively easy to match the optical axis, the image shake due to the vibration of the vehicle is less, the driver can easily observe the rear region of the vehicle.

Claims (12)

A housing coupled to the front region of the driver's seat so that the opening formed at one side faces the outer rear region of the vehicle and the opening formed at the other side faces the inner side of the vehicle; At least one objective lens refracting the converged light to converge, an upper reflecting unit reflecting light passing through the horizontal center line of the objective lens, and a mutual internal contact angle with the upper reflecting unit at a right angle An objective lens system disposed to correspond to a horizontal center line of the objective lens and having a lower reflecting unit reflecting light passing through a lower side of the horizontal center line of the objective lens; A third reflection part disposed after the focal length of the objective lens and reflecting light reflected by the upper and lower reflection parts to an inner opening area of the housing, and at least one coupled to an inner opening area of the housing; And an alternative lens system having an alternative lens for expanding and refracting the light reflected by the third reflecting unit to a predetermined unit magnification. The rearview mirror of claim 1, wherein the upper reflecting portion and the lower reflecting portion are an amish type prism formed integrally with each other. The vehicle rearview mirror of claim 1, wherein the objective lens, the upper reflection portion, and the lower reflection portion are an amish-type prism formed integrally with each other. The rearview mirror of claim 1, wherein the third reflector is a planar reflector. The rearview mirror of claim 1, wherein the third reflector and the alternative lens are integrally formed with each other. The rearview mirror of claim 5, wherein the third reflector is a prism. The rearview mirror of claim 1, wherein the alternative lens comprises a flat convex lens disposed in an inner opening region of the housing, and a convex convex lens disposed between the flat convex lens and the third reflecting portion. . 8. The housing of claim 1, wherein the housing comprises: an exterior portion coupled to the vehicle such that a spherical portion formed at one end thereof is exposed to the inside of the vehicle, and an inner tube portion pivotably coupled to the spherical portion. Vehicle rearview mirror, comprising: a. According to claim 8, An air inlet is formed on one side and the outer duct coupled to surround the outer portion, and the first branch pipe for guiding the air introduced into the outer duct through the air inlet to the surface of the objective lens Vehicle rearview mirror, characterized in that it further comprises. 10. The apparatus of claim 9, wherein one end of the inner duct is in communication with the outer duct and coupled to surround the inner tube, and the air branched from the first branch pipe and introduced through the air inlet is disposed at the outermost portion of the housing. And a second branch pipe for guiding to the surface of the alternative lens. 10. The rearview mirror of claim 9, further comprising heating means disposed in a flow path of air introduced through the air inlet to heat the air. 12. The vehicle rearview mirror of claim 9, further comprising a blower disposed in the outer duct to allow air from the outside to flow into the outer duct through the air inlet.