sunshade

Abstract

To solve a problem that, in a convenience sunshade, it has been difficult to capture a suspicious person by an on-vehicle camera in the vicinity of a front pillar due to a risk that an eaves is flipped up by a strong wind, and an attachment state becomes incomplete.SOLUTION: A sunshade 1 for use in an automobile V in which an on-vehicle camera C is arranged at a cabin side comprises an opening part 2 formed in a position relatively opposing the on-vehicle camera C in a state of being attached to a front face of windshield glass W, and an optical mechanism 3 arranged outside the opening part 2. The optical mechanism 3 comprises a sub-light shield part 4 for shielding the sunlight, and a light guide part 5 for reflecting or refracting light from a sideway of the windshield glass W to a direction of the opening part 2. A proper attachment state can be maintained under even a strong wind, a visual field in the vicinity of the front pillar P is secured by the on-vehicle camera C, and a theft prevention function is thereby improved.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a sunshade that is attached to the front of a windshield glass of an automobile to block sunlight. [Background technology]

[0002] An example of a conventional sunshade is described in Non-Patent Document 1. The sunshade described in Non-Patent Document 1 is attached to cover the front of the windshield glass of an automobile, and has an opening with a canopy at a position corresponding to an on-board camera such as a drive recorder. This sunshade blocks sunlight to prevent the temperature inside the vehicle from rising, and also has a crime prevention function by ensuring the field of view of the on-board camera through the opening. [Prior art documents] [Non-patent literature]

[0003] [Non-Patent Document 1] https: / / item.rakuten.co.jp / kmmotors / p00000en / Summary of the Invention [Problem to be solved by the invention]

[0004] However, conventional sunshades as described above have an opening with a eaves, which means that there is a risk that the eaves will be blown around by strong winds, causing the sunshade to be incompletely attached. In addition, suspicious people who approach cars often behave near the front pillars, making it difficult to capture them in the field of view of the vehicle-mounted camera. The challenge was to solve these problems.

[0005] The present invention has been made with an eye on the above-mentioned conventional problems, and aims to provide a sunshade that can be maintained in the correct installation state even in strong winds, and that can ensure a field of view near the front pillar using an on-board camera as a crime prevention measure. [Means for solving the problem]

[0006] The sunshade according to the present invention is a so-called external type that is attached to the front of the windshield glass in an automobile in which an on-board camera is arranged on the passenger compartment side of the windshield glass. This sunshade has an opening arranged in a position facing the on-board camera when attached to the front of the windshield glass, and an optical mechanism arranged on the outside of the opening. The sunshade is characterized in that the optical mechanism has a secondary shading section arranged on the outside to block sunlight, and a light guiding section arranged on the inside to reflect or refract light from the side of the windshield glass toward the opening. Effect of the Invention

[0007] The sunshade according to the present invention has an optical mechanism outside the opening and does not have a large protruding part like a canopy, so it is less susceptible to strong winds. In addition, the sunshade has an optical mechanism arranged outside the opening and a secondary shading part arranged outside it, so the sunshade body and the secondary shading part block sunlight and prevent the temperature inside the vehicle from rising. Furthermore, the optical mechanism of the sunshade reflects or refracts light from the side of the windshield glass toward the opening with a light guide part arranged inside, and the light is captured by the vehicle-mounted camera. In other words, since suspicious people in vehicles often act near the front pillars, the light guide part of the optical mechanism makes it possible to capture and record suspicious people near the front pillars in the field of view of the vehicle-mounted camera.

[0008] In this way, the sunshade of the present invention can maintain the correct installation even in strong winds, and can ensure a clear view of the area near the front pillar using the vehicle-mounted camera, thereby enhancing crime prevention functionality. [Brief description of the drawings]

[0009] [Figure 1] 1 is a perspective view illustrating a state in which a sunshade according to a first embodiment of the present invention is attached to an automobile. FIG. [Diagram 2] FIG. 2 is a horizontal cross-sectional view of the sunshade shown in FIG. [Diagram 3] FIG. 2 is a vertical sectional view of the sunshade shown in FIG. [Figure 4] FIG. 4 is a horizontal cross-sectional view illustrating a second embodiment of the sunshade according to the present invention. [Diagram 5] FIG. 11 is a horizontal cross-sectional view illustrating a third embodiment of the sunshade according to the present invention. [Figure 6] FIG. 10 is a horizontal cross-sectional view illustrating a fourth embodiment of the sunshade according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] First embodiment 1 is attached to cover the front of the windshield glass of an automobile V and is fixed to the vehicle body by a plurality of belts B that are fastened to a front pillar P or a front fender F, or by suction cups, magnets, or the like (not shown). As is well known, this sunshade 1 is used to block sunlight and prevent the temperature inside the vehicle from rising.

[0011] The sunshade 1 described above is suitable for an automobile V in which an on-board camera C such as a drive recorder is disposed on the passenger compartment side of the windshield glass W, as shown in Figure 2 and Figure 3, and is attached to the front of the windshield glass W as shown in Figure 1. This sunshade 1 has an opening 2 disposed in a position facing the on-board camera C when attached to the front of the windshield glass W, and an optical mechanism 3 disposed on the outside of the opening 2.

[0012] The optical mechanism 3 includes a sub-shading section 4 arranged on the outside to block sunlight L1, and a light guiding section 5 arranged on the inside to reflect (L3) or refract light L2 from the side of the windshield glass W toward the opening 2. In other words, the optical mechanism 3 forms an optical path for capturing light L2 from the side of the windshield glass W, i.e., the vicinity of the front pillar P, with the on-board camera C.

[0013] The optical mechanism 3 in this embodiment is held at a position spaced apart from the windshield glass W. In this case, the optical mechanism 3 may be configured to include a holding member for maintaining its position. The holding member also maintains a gap for passing light L2 from the side of the windshield glass W. Note that the optical mechanism 3 may be configured to be in contact with the windshield glass W, but if it is configured to be spaced apart from the windshield glass W as in the illustrated example, a large field of view to the sides of the windshield glass W can be ensured and also contribute to protecting the windshield glass W.

[0014] The auxiliary shading part 4 is made of a material having a visible light transmittance of less than 30%, and more preferably, a material having a visible light transmittance of 0%. An example of a material having a visible light transmittance of less than 30% is mirror glass (sunglasses). In a more preferable embodiment, the auxiliary shading part 4 can be made of the same material as the sunshade body, and more specifically, can be made of any one of resin, metal, and cloth.

[0015] The light guiding section 5 is a pair of left and right mirrors 5A, 5B that reflect light L2 from both the left and right sides of the windshield glass W toward the opening 2 (reflected light L3), and in this embodiment, both of the pair of left and right mirrors 5A, 5B are flat mirrors. The two mirrors 5A, 5B are joined at a nearly right angle and are disposed so that each is inclined at an angle of about 45 degrees with respect to the opening 2. In the illustrated example, the rear surfaces of the mirrors 5A, 5B joined at a nearly right angle are used as the sub-shading section 4, but the sub-shading section 4 may be disposed so as to form a triangular prism together with the two mirrors 5A, 5B.

[0016] In addition, the sunshade 1 is configured such that in the normal direction of the windshield glass W (the vertical direction in FIG. 2), the projected area of the optical mechanism 3 is larger than the opening area of the opening 2. As shown in FIGS. 2 and 3, the optical mechanism 3 has a width dimension w2 and a height dimension h2 that are larger than the width dimension w1 and the height dimension h1 of the opening 2 (w1 < w2, h1 < h2). Note that the height dimensions w1 and w2 are dimensions in the direction along the inclination of the windshield glass W.

[0017] The sunshade 1 having the above configuration has the optical mechanism 3 outside the opening 2 and has no large protruding portion like an eaves, so it has a structure that is not easily affected by strong winds. In addition, since the optical mechanism 3 arranged outside the opening 2 of the sunshade 1 has the sub-shading portion 4 arranged outside thereof, the sunshade main body and the sub-shading portion 4 block the sunlight L1 to prevent the temperature in the vehicle interior from rising.

[0018] Furthermore, in the sunshade 1, the optical mechanism 3 reflects or refracts the light L2 from the side of the windshield glass W in the direction of the opening 2 by the light guide portion 5 arranged inside thereof, and the vehicle-mounted camera C images the light L3. That is, since a suspicious person with respect to the automobile V often acts in the vicinity of the front pillar P, the light guide portion 5 of the optical mechanism 3 can capture and record a suspicious person in the vicinity of the front pillar P in the field of view of the vehicle-mounted camera C.

[0019] In this way, the above sunshade 1 can maintain a correct mounting state even under strong winds, can secure a field of view in the vicinity of the front pillar P by the vehicle-mounted camera C, and can enhance the security function (monitoring function).

[0020] The sunshade 1 employs flat mirrors 5A, 5B as a pair of left and right mirrors constituting the light guide section 5, which reflect light L2 from both the left and right sides of the windshield glass W toward the opening 2, and captures the reflected light L3 with the vehicle-mounted camera C. As a result, the sunshade 1 has a relatively simple structure, yet is capable of simultaneously capturing images of the vicinity of the left and right front pillars P with the vehicle-mounted camera C. In particular, the use of the flat mirrors 5A, 5B allows the vehicle-mounted camera C to capture images that are undistorted and have high visibility.

[0021] Furthermore, by forming the auxiliary shading portion 4 of the above-mentioned sunshade 1 using a material that does not transmit visible light, it is possible to block visible light entering from the normal direction of the windshield glass W, thereby ensuring sufficient shading for the interior of the vehicle and eliminating the effect of backlight on the vehicle-mounted camera C to obtain good images.

[0022] Furthermore, if the above sunshade 1 is configured to form the secondary shading part 4 from the same material as the sunshade body, for example, when the opening 2 is formed in the sunshade body, the cut-out scraps can be used for the secondary shading part 4, improving material yield and reducing manufacturing costs. Also, the above sunshade 1 makes it easy to integrate the secondary shading part 4 with the sunshade body, which enhances the sense of unity with the sunshade body and improves the external appearance.

[0023] Furthermore, the material of the auxiliary shading part 4 of the sunshade 1 can be any one of resin, metal, and cloth, and when resin or metal is used, it is easy to process and has a high degree of freedom in shape. Also, when cloth is used for the auxiliary shading part 4 of the sunshade 1, it is flexible, lightweight, and has a high degree of freedom in shape.

[0024] Furthermore, by configuring the projected area of ​​the optical mechanism 3 in the normal direction of the windshield glass W to be larger than the opening area of ​​the opening 2, the sunshade 1 can adequately block visible light entering from the normal direction, and can adequately suppress loss of light-blocking function despite the presence of the opening 2.

[0025] 4 to 6 are diagrams illustrating second to fourth embodiments of the sunshade according to the present invention. In the following embodiments, the same components as those in the first embodiment are given the same reference numerals, and detailed description is omitted. The overall structure of the sunshade 1 is the same as the structure shown in FIG.

[0026] Second Embodiment The sunshade 1 shown in Figure 4 has a pair of left and right mirrors that constitute the light-guiding section 5 of the optical mechanism 3, both of which are wide-angle mirrors 5C, 5D, which reflect light L2 from both the left and right sides of the windshield glass W at a wide angle and guide this reflected light L3 to the vehicle-mounted camera C.

[0027] This sunshade 1 can achieve the same effects and advantages as the first embodiment, and by adopting wide-angle mirrors 5C, 5D that constitute the light-guiding section 5, the imaging area per unit area of ​​the vehicle-mounted camera C is increased, thereby improving the crime prevention effect and making the light-guiding section 5 more compact.

[0028] Third embodiment The sunshade 1 shown in Figure 5 has a pair of left and right mirrors that constitute the light-guiding section 5 of the optical mechanism 3, each of which is a combination of a flat strong mirror 5A and a wide-angle mirror 5C, and is configured to reflect one light L2 from both the left and right sides of the windshield glass W by the flat mirror 5A, and reflect the other light L2 at a wide angle by the wide-angle mirror 5C, and guide it to the vehicle-mounted camera C.

[0029] In the above sunshade 1, it is desirable to determine the arrangement of the flat mirror 5A and the wide-angle mirror 5C depending on, for example, the mounting position of the vehicle-mounted camera C. That is, when the vehicle-mounted camera C is placed to the left in the vehicle cabin, the flat mirror 5A is on the left side and the wide-angle mirror 5B is on the right side, and when the vehicle-mounted camera C is placed to the right in the vehicle cabin, the wide-angle mirror 5C is on the left side and the flat mirror 5A is on the right side.

[0030] That is, in the above sunshade 1, the mirror closer to the front pillar P is the flat mirror 5A and the mirror farther away is the wide-angle mirror 5C depending on the mounting position of the vehicle-mounted camera C. In this way, the sunshade 1 reflects the vicinity of the nearby front pillar P with the flat mirror 5A so that the vehicle-mounted camera C can capture a good image without distortion, and the wide-angle mirror 5C widens the field of view of distant areas so that the vehicle-mounted camera C can capture a wide range.

[0031] In this way, the above sunshade 1 can obtain the same action and effect as the first embodiment, and by combining the light-guiding section 5 with a flat mirror 5A and a wide-angle mirror 5C, a reflection function according to the position of the vehicle-mounted camera C is realized, making it possible to obtain good images.

[0032] Fourth embodiment 6, the sunshade 1 has a light guide section 5 of an optical mechanism 3 equipped with a magnifying lens 6 disposed at an opening 2, and light 2 from the side of the windshield glass W is reflected by a pair of left and right flat mirrors 5A, 5B constituting the light guide section 5, and the reflected light L3 is refracted by the magnifying lens 6 and guided to an in-vehicle camera C. At least one of the pair of flat mirrors 5A, 5B may be a wide-angle mirror 5C.

[0033] The sunshade 1 described above can provide the same functions and effects as the first embodiment, and in addition, the image pickup target area per unit area of ​​the vehicle-mounted camera C is increased, thereby improving the crime prevention effect.

[0034] The configuration of the sunshade according to the present invention is not limited to the above-described embodiments, and it is possible to appropriately modify it or combine the configurations of the various embodiments without departing from the gist of the present invention.

[0035] The sunshade according to the present invention covers the front surface of the windshield glass in an automobile equipped with an on-board camera facing the front of the vehicle body. However, the sunshade of the present invention can also be applied to cover the outer surface of the rear glass in an automobile equipped with an on-board camera facing the rear of the vehicle body. In this case, the vehicle-mounted camera can capture an image of the vicinity of the rear pillar or rear fender, simply by reversing the front-to-rear relationship of the vehicle body from that in each embodiment. [Explanation of symbols]

[0036] C. Car camera V Automobile W Windshield Glass 1 Sunshade 2 Opening 3 Optical mechanism 4. Sub-shading section 5 Light guide section 5A,5B Flat mirror 5C, 5D Magnifying Glass 6 Magnifying Lens

Claims

1. A sunshade attached to a front surface of a windshield glass in a vehicle having an on-board camera disposed on the passenger compartment side of the windshield glass, an opening portion disposed in a position facing the vehicle-mounted camera when the vehicle-mounted camera is attached to the front surface of the windshield glass; and an optical mechanism disposed outside the opening portion, A sunshade characterized in that the optical mechanism comprises a secondary shading section arranged on the outside to block sunlight, and a light guiding section arranged on the inside to reflect or refract light from the side of the windshield glass toward the opening.

2. 2. The sunshade according to claim 1, wherein the light guide portion is a pair of mirrors that reflect light from both the left and right sides of the windshield glass toward the opening.

3. 2. The sunshade according to claim 1, wherein the pair of left and right mirrors constituting the light guide portion are both flat mirrors.

4. 2. The sunshade according to claim 1, wherein the pair of left and right mirrors constituting the light guide portion are both wide-angle mirrors.

5. 2. The sunshade according to claim 1, wherein the pair of left and right mirrors constituting the light guide portion is a combination of a flat mirror and a wide-angle mirror.

6. The sunshade according to any one of claims 1 to 5, characterized in that the light guide of the optical mechanism includes a magnifying lens disposed at the opening.

7. 7. The sunshade according to claim 1, wherein the auxiliary light-shielding portion is formed from a material that does not transmit visible light.

8. 8. The sunshade according to claim 7, wherein the auxiliary light-shielding portion is made of the same material as the sunshade body.

9. 9. The sunshade according to claim 7, wherein the auxiliary light-shielding portion is made of any one of a resin, a metal, and a cloth.

10. 10. The sunshade according to claim 1, wherein a projected area of ​​the optical mechanism in a normal direction of the windshield glass is larger than an opening area of ​​the opening.

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