JP4456247B2 - Car side visor that reduces wind noise - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an automobile side visor. In particular, the present invention relates to an automobile side visor that can reduce wind noise.
[0002]
[Prior art]
Conventionally, an automobile side visor (hereinafter simply referred to as a side visor) may be attached to a side window frame of an automobile for the purposes of rain protection, awning, prevention of wind blowing, or decoration. A side visor is widely used because an automobile with a side visor attached thereto can receive various benefits as described above, compared with an automobile without a side visor attached. However, if the side visor is attached to the vehicle body, wind noise may increase during vehicle travel.
The present inventor has made many studies so far in order to reduce wind noise. For example, it has been found that wind noise can be reduced by shortening the distance (H in FIG. 3) between an automobile side window glass (hereinafter simply referred to as glass) and a side visor.
[0003]
[Problems to be solved by the invention]
The method based on the conventional knowledge, that is, the method of reducing wind noise by shortening the distance between the glass and the side visor has a limit. This is because there is a limit to shortening the above-mentioned distance due to the presence of an indispensable fixture for attaching the side visor to the window frame. If the distance H between the glass and the side visor is excessively shortened, for example, the cap 58 that is a part of a fixture described later and the glass 22 interfere with each other.
In the recent automobile industry, quietness that cannot be achieved by conventional measures has started to be demanded, especially in high-end passenger cars that require particularly high quietness.
An object of this invention is to implement | achieve the side visor which implement | achieves the silence which cannot be achieved by the conventional wind noise reduction measure.
[0004]
[Means, actions and effects for solving problems]
The side visor of the present invention is attached to a window frame forming a vehicle body side window opening, and has an outer edge extending along the front edge of the window frame and an inner edge extending substantially parallel to the outer edge at a predetermined distance from the outer edge to the vehicle rear side. And a lower edge connecting the lower edge of the outer edge and the lower edge of the inner edge. A rib that protrudes toward the vehicle body along the lower edge is formed , and the rib gradually increases in the protruding height from the lower edge to the inner edge at the connecting portion between the lower edge and the inner edge. It has a domain .
An ordinary automobile is often provided with a door mirror at the lower end of the front edge of the window frame. In the vicinity of the door mirror, turbulence tends to occur when the vehicle travels. In the side visor of the present invention, a rib that protrudes toward the vehicle body side is formed along the lower edge of the side visor arranged in the vicinity of the door mirror, so the wind noise is reduced by suppressing the degree of turbulence that occurs. Can be made.
In addition, the connecting part between the lower edge and the inner edge has a gradually changing area where the protruding height of the rib gradually decreases from the lower edge to the inner edge, so turbulence generated when the traveling wind leaves the side visor Can be further suppressed.
[0005]
In this case, it is preferable that the rib is formed on the lower edge. That is, it is preferable that there is no distance between the rib and the lower edge. In this case, the side visor is easy to mold and the aesthetic appearance is not impaired.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
First, the main features of the side visor described in the examples are specified.
(Mode 1) The lower edge has a portion extending substantially in the horizontal direction and a portion curved toward the inner edge, and a gradually changing portion is formed in the curved portion.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments embodying the present invention will be described below. As well shown in FIG. 1, the vehicle body side door 24 has a window frame 32 forming a vehicle body side window opening. The window frame 32 has a window frame front edge 16, a window frame upper edge 28, and a window frame rear edge 26. Usually, the window frame leading edge 16 and the window frame upper edge 28 are smoothly continuous and the boundary is not clear. The glass 22 moves up and down in the window frame 32.
A door mirror base 20 is attached to the front lower end of the window frame 22, and the door mirror 18 is attached to the door mirror base 20.
[0009]
The side visor 2 is attached from the window frame leading edge 16 to the window frame upper edge 28. In many cases, the rear edge of the side visor 2 is fixed to the window frame rear edge 26. The side visor 2 includes a mounting portion 6 and a main body portion 4.
The attaching part 6 is a part for attaching to the window frame 32. As shown well in FIG. 1, the attachment portion 6 extends from the window frame front edge 16 to the window frame upper edge 28 and reaches the window frame rear edge 26. As shown in FIGS. 2 and 3, the mounting portion 6 is fixed to the window frame 32 in a watertight manner by a double-sided adhesive tape 34.
As shown well in FIGS. 2 and 3, the main body portion 4 bulges from the attachment portion 6 to the side opposite to the vehicle body and extends toward the center side of the window frame 32. Reference numeral 42 indicates an inner side visor surface, and reference numeral 44 indicates an outer side visor surface. The boundary between the body portion 4 and the attachment portion 6 is referred to as an outer edge 8. The outer edge 8 extends along the window frame front edge 16 and the window frame upper edge 28, respectively.
The main body 4 includes an inner edge 10. The inner edge 10 extends substantially parallel to the outer edge 8 at a predetermined distance from the outer edge 8 toward the vehicle rear side in the portion along the window frame front edge 16, and the lower edge from the outer edge 8 in the portion along the window frame upper edge 28. And extend substantially parallel to the outer edge 8 at a predetermined distance.
As well shown in FIGS. 1 and 4, the main body 4 has a lower edge 14 that connects the lower end of the outer edge 8 and the lower end 48 of the inner edge 10. The lower edge 14 has a portion that extends substantially horizontally, and a portion that curves upward and then connects to the inner edge 10. The lower edge 14 is located in the vicinity of the window frame front edge 16 and extends substantially horizontally near the upper part of the door mirror 18.
[0010]
As well shown in FIG. 2, a rib 40 is formed along the lower edge 14 so as to protrude from the inner side visor surface 42 toward the vehicle body. As is well shown in FIG. 4, the protruding height of the rib 40 is substantially uniform in the portion of the lower edge 14 that extends substantially horizontally. A gradually changing region 46 where the protruding height of the rib 40 gradually changes is provided at a portion that curves toward the inner edge 10. Details of the gradual change region will be described with reference to FIGS. 5, 6, and 7.
5 schematically shows a VV section of FIG. 4, FIG. 6 schematically shows a VI-VI section, and FIG. 7 schematically shows a VII-VII section.
[0011]
As shown in FIG. 5, in the VV cross section of FIG. 4, the rib 40 has a protruding height of a. In the left side from the line VV in FIG. 4, that is, in a range where the lower edge extends substantially horizontally, the protruding height of the rib 40 is a fixed protruding height a. In the joint portion between the attachment portion 6 and the lower edge 14, the adhesive surface of the attachment portion 6 and the top surface of the rib 40 are continuous at the same height.
[0012]
In the right side from the VV line in FIG. 4, that is, in the portion where the lower edge 14 is curved upward and is connected to the inner edge 10, the protruding height of the rib is gradually reduced. FIG. 6 shows a VI-VI cross-sectional view at a substantially central position of the gradual change region 46. The rib 40 has a protruding height b. The protrusion height b is lower than the protrusion height a.
At the position 48 where the lower edge 14 and the inner edge 10 are in contact, as shown in FIG.
[0013]
The side visor 2 is used by being attached to the window frame 32. As shown in FIGS. 2 and 3, the attachment portion 6 of the side visor 2 is fixed to the window frame 32 by the double-sided tape 34 over the entire length.
Further, the support member 50 is fixed to the window frame 32 at two locations near the line III-III in FIG. 1 and the vicinity of the window frame trailing edge 26. FIG. 3 shows a III-III cross section of FIG. The main body 4 is provided with a through hole that reaches the side visor inner surface 42 from the side visor outer surface 44. A through hole is provided at a position corresponding to the support member 50.
After matching both the through holes, a cap 58 is applied to the inside of the through hole of the support member 50 and the rivet 52 is pushed in from the outside of the through hole of the main body portion 4. The rivet 52 includes a pin 54 and a cylindrical body 56, and the pin 52 is inserted into the cylindrical body 56 halfway before insertion. When the rivet 52 passes through the through-hole of the side visor 2 and the through-hole of the support member 50 and is strongly pushed into the hole of the cap 58, the cylinder 56 is pushed into the hole of the cap 58, and the pin 54 is deeply inserted into the cylinder 56. The cylindrical body 56 is pushed and spread by the pin 54, and the cylindrical body 56 is fixed in the hole of the cap 58. In this way, the side visor 2 is fixed to the vehicle body by the support member 50 at two locations on the front and rear sides.
[0014]
A glass run 36 is disposed inside the window frame 32. In a state where the glass 22 is closed, the upper edge of the glass 22 abuts on the glass run 36 and the interior and exterior of the vehicle are blocked. The support member 50 is inserted between the window frame 32 and the glass run 36 and fixed to the window frame 32.
[0015]
Next, it will be described that the wind noise is reduced by forming the rib 40 on the lower edge 14 of the side visor 2.
The side visor 2 having the ribs 40 is attached to the window frame 32. A sound collecting microphone is fixed at a position 10 cm away from the indoor side surface of the glass 22. With the glass 22 closed, the vehicle is driven at a speed of 100 km / h to measure wind noise. As a result, when the side visor 2 having the ribs 40 was used, a sound pressure level of 49.2 dBA was measured in the 2 kHz sound range. When the measurement was performed under the same conditions using a side visor having the same shape but having no rib 40, a sound pressure level of 49.4 dBA was measured in the 2 kHz sound range. Human hearing is sensitive to sounds around 2 kHz. In the 2 kHz sound range, the side visor 2 having the rib 40 was able to reduce the sound pressure level by 0.2 dBA compared to the side visor not having the rib 40.
It is estimated that the above-described wind noise reduction action suppresses the degree of turbulence generated in the vicinity of the door mirror 18 by the rib 40 located in the vicinity of the door mirror 18.
[0016]
The lower edge 14 of the side visor 2 of the present embodiment has a portion extending in a substantially horizontal direction and a portion smoothly curved and connected to the inner edge 10, but is not limited to this form. For example, the lower edge 14 may be inclined and extended as a whole. Moreover, there is no restriction | limiting in the curvature radius of the part which curves and connects to the inner edge 10, and it is effective also in the case of a big circular arc, and is effective also in the case of a small circular arc. Further, the rib 40 functions effectively even when the entire lower edge 14 is curved and connected from the outer edge 8 to the inner edge 10.
[0017]
Even if the rib 40 extends from the lower edge 14 at a distance and substantially parallel to the lower edge 14, a wind noise reduction effect can be obtained. The rib 40 of the present embodiment is formed on the lower edge 14 without a distance. This side visor is easy to mold and excellent in aesthetics.
The rib 40 of the present embodiment disappears at the position where the lower edge 14 reaches the inner edge 10, but does not require a strict positional relationship. Any rib may be used as long as the rib is not present near the boundary position 48 between the lower edge 14 and the inner edge 10.
The rib 40 of the present embodiment has a constant protruding height at a portion where the lower edge 14 extends substantially horizontally on the left side from the line VV in FIG. The position where the protruding height is constant may be on the outer edge 8 side or the inner edge 10 side from the VV line.
The height, width, and taper of the rib 40 are not limited to the shapes shown in the figure. Various shapes can be taken depending on the shape of the side visor itself and the required quietness.
[0018]
The embodiment described above is merely an example of the invention, and can be implemented in various modes within the scope of the claims. The scope of the invention is not limited to the examples.
[Brief description of the drawings]
FIG. 1 is a front view of a side visor according to an embodiment attached to a window frame of a vehicle body side door.
FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
3 is a cross-sectional view taken along the line III-III in FIG.
4 is an enlarged view of the vicinity of IV in FIG. 1;
5 is a cross-sectional view taken along line VV in FIG.
6 is a sectional view taken along line VI-VI in FIG.
7 is a cross-sectional view taken along the line VII-VII of FIG.
[Explanation of symbols]
2: Side visor 4: Body portion 6: Mounting portion 8: Outer edge 10: Inner edge 14: Lower edge 40: Rib 46: Gradual change region 48: Boundary position between lower edge and inner edge

Claims (2)

An automotive side visor attached to a window frame forming a vehicle body side window opening, an outer edge extending along the front edge of the window frame, and an inner edge extending substantially parallel to the outer edge at a predetermined distance from the outer edge to the vehicle rear side And having a lower edge connecting the lower edge of the outer edge and the lower edge of the inner edge,
And ribs projecting toward the vehicle body is formed along its lower edge,
The side visor for an automobile according to claim 1 , wherein the rib has a gradually changing region in which a protruding height gradually decreases from the lower edge to the inner edge at a connection portion between the lower edge and the inner edge .   The automobile side visor according to claim 1, wherein the rib is formed on a lower edge.

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