JPS6231657B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <<Field of the Invention>> The present invention relates to an automobile sun visor, and more particularly to a bearing structure for an automobile sun visor whose angular posture can be freely adjusted during use.

≪Prior art and its problems≫ The conditions required for automobile sun visors are particularly the frictional retention force between the shaft and the sun visor to prevent them from falling off the ceiling unexpectedly and obstructing visibility due to automobile vibrations, etc. It is desirable that the frictional holding force is sufficiently set so that it does not decrease even if the folding and unfolding operations are repeated, and that a light click-axis movement is performed each time the rotation operation is performed.

Conventionally, the structure of a shaft holder for this purpose, as shown in FIG. 2 is fixed at both ends, and an opening is formed in the center of the bearing portion 1a,
A plate spring 3 whose both sides are flattened is attached to this opening 1c.

Further, the tip of the shaft 4 to be fitted therein is formed with notches 4a, 4a on both sides. When the sun visor is retracted along the ceiling surface, the notch 4a of the shaft 4 comes into contact with the flattened portions on both sides of the leaf spring 3, as shown in Fig. 2A. , the state becomes stable. By rotating the sun visor downward from this retracted state, the shaft 4 bulges the leaf spring 3 outward, increasing the frictional engagement force between the two, as shown in FIG. 2B. .

In other words, while the sun visor with this configuration can be fixed with moderation as shown in Figure 2A when it is stored on the ceiling, it is difficult to fix the sun visor when it is rotated 180 degrees from the stored state. Even in the use state, the notch 4a of the shaft 4 and both sides of the leaf spring 3 come into contact with each other and are fixed with moderation.

However, when using the sun visor by rotating it downward from the retracted state, the angular position of the sun visor must be freely adjusted depending on the angle of sunlight. When fixed with moderation, there was a problem in that the angular posture could only be adjusted at one point, and it was not possible to freely set it according to the angle of contact.

Furthermore, in view of such problems, a bearing structure as shown in FIG. 3 has also been proposed.

This device consists of a leaf spring 3 with a flat part 3A formed on only one side, and a shaft 4 with a flat notch 4A formed on one side, and allows the sun visor to be stored along the ceiling surface. At this time, the state shown in FIG. 3A is reached, and the flat portion 3A of the leaf spring 3 and the notch 4A of the shaft 4 come into contact with each other, resulting in stable and moderate fixation. Then, by rotating the sun visor downward with respect to the shaft 4 from this state, the arcuate portion 4b of the shaft 4 comes into contact with the flat portion 3A of the leaf spring 3, as shown in FIG. 3B. The operating position is not properly fixed.

However, even with such a structure, both edges of the flat portion 4A of the shaft 4 come into contact with the arcuate portion 3b of the leaf spring 3 at the position shown in FIG. 3C, which is rotated 180 degrees from the storage position. , a relatively weak click force is generated, which also has the disadvantage of becoming a moderate fixing point.

Further, as the sun visor body rotates, the flat portion 3A of the leaf spring 3 curves and swells due to the circular arc portion 4b of the shaft 4, and accordingly, the flat portion 3A of the leaf spring 3
The circular arc portion 3b is pulled in the direction of the arrow as shown in FIGS. 3B and 3C.

Therefore, the frictional torque between the leaf spring 3 and the shaft 4 changes, and therefore, when using the sun visor, it has been pointed out that the frictional torque changes depending on the angular posture, making it impossible to perform a smooth rotation operation. has been done.

≪Object of the Invention≫ This invention has been made in view of the above-mentioned circumstances, and an object of the present invention is that when the sun visor body is lowered from the ceiling, its angular posture can be freely set, and the sun visor body can always be strongly To provide a bearing structure for a sun visor for an automobile whose angular attitude can be adjusted by torque and which eliminates torque deviation due to rotation angle.

<<Configuration and Effects of the Invention>> In order to achieve the above object, the present invention provides a shaft holder in which a bearing part is formed and a sun visor core constituent member is disposed at the base thereof, and a shaft holder in which a shaft holder is provided with a shaft holder in the center of the bearing part of the shaft holder. A leaf spring having a substantially U-shaped cross section and having both leg ends fixed to the base, and a leaf spring that is fitted into the bearing part and abuts the inner surface of the leaf spring to hold the shaft holder. A bearing structure for an automobile sun visor comprising: a shaft for rotatably holding a shaft holder, wherein flat portions are formed alternately along the axial direction of the shaft on both sides of the leaf spring; The flat part is made to protrude inwardly, and the shaft is provided with a flat notch corresponding to the flat part of the leaf spring and abutting on the flat part.

That is, in the bearing structure of an automobile sun visor according to the present invention, flat portions are formed alternately along the axial direction of the shaft on both sides of the leaf spring,
This flat part is formed protruding inside the opening of the shaft holder, and in correspondence with each flat part of the leaf spring, the shaft has a flat notch part that abuts with this flat part in the axial direction of the shaft. Because they are formed alternately along the
There is no torque deviation and its angular attitude can be adjusted with uniform torque, and since its spring surfaces are symmetrical at at least two points, an extremely strong friction torque can be obtained.

Therefore, complaints such as the sun visor body unexpectedly coming down from the ceiling of the car are eliminated, and the torque on the contact surface between the shaft and the leaf spring is uniform at any rotational position, improving operability. It has advantages such as being able to be held and fixed in any position.

<<Description of Embodiments>> Hereinafter, one embodiment of a bearing structure for an automobile sun visor according to the present invention will be described in detail with reference to the accompanying drawings.

In FIG. 4, the sun visor body has a wire 10 bent to form a frame periphery and a shaft holder 11 having both ends of the wire 10 integrally fixed to its base 11a. This shaft holder 1
1 has a bearing part 11 bent into a loop shape.
b, 11b are formed, and an opening is formed in the center thereof, and a plate spring 13 having a substantially U-shaped cross section is attached to this opening 12. The shaft 16 fitted into the bearing portion 11b is held under pressure by the spring 13.

The leaf spring 13 has a pair of locking pieces 14, 14 integrally formed on its leg portion 13a, which are inclined upward. A U-shaped fixing piece 15 for fitting is fixed, and the locking piece 14 is engaged with a locking piece 15a formed with a notch on both sides of the fixing piece 15. By doing so, the leaf spring 13 is attached to the shaft holder 11.
I am trying to fix it to .

Additionally, flat portions 13c, 13c are formed along the axial direction of the shaft 16 on both sides of the loop-shaped spring portion 13b integrally connected from the leg portion 13a of the leaf spring 13. On the other hand, each flat portion 13 of the leaf spring 13 is attached to the shaft 16.
Similarly, flat cutouts 16a, 16a are formed alternately in the axial direction of the shaft 16, corresponding to and in contact with the cutouts c, 13c.

Therefore, when the shaft 16 and the leaf spring 13 are fixed to the shaft holder 11, the fifth
As shown in FIGS. 6A and 6B, the notch 16 is formed along the axial direction of the shaft 16.
a, 16a come into contact with flat parts 13c, 13c formed alternately on both sides of the leaf spring 13, respectively, so that the sun visor is retracted along the ceiling surface in a stable state.

When the sun visor body is lowered from the ceiling surface and adjusted to the desired angular posture, the main body side consisting of the shaft holder 11 and wire 10 is rotated relative to the shaft 16 to adjust its angular position. In that case, as shown in FIGS. 7A and 7B, the flat portion 13c of the leaf spring 13,
13c is in contact with the outer peripheral surface of the shaft 16 other than the notch 16a, and in this case, the flat part 13
c and 13c are curved and bulged in the left-right direction, and the required friction torque can be obtained between the contact points. In addition, in this curved and swollen state, the torque exerts a force on the flat portion 13c on one side that tends to tilt the flat portion 13c in either the left or right direction using the leg portion 13a side of the leaf spring 13 as a fulcrum. In this case, the flat part 13
Since c is formed on both sides, their torques are mutually canceled, and as a result, when the sun visor main body side rotates, the eccentricity of the leaf spring 13 is completely eliminated.

Furthermore, in the state shown in FIGS. 7A and 7B, the outer circumferential surface of the shaft 16 other than the notch 16a and the flat portion 13c of the leaf spring 13 are in line contact rather than surface contact. ,moreover,
Since the flat portion 13c of the leaf spring 13 is curved outward, it does not serve as a fixed fixing point, and therefore, the shaft 16 is fixed with uniform spring force except for the notch 16a of the shaft 16. become.

In addition, when storing the sun visor, the sun visor main body side is rotated so that the flat parts 13c, 13c of the leaf spring 13 are aligned with the notch part 16 of the shaft 16.
When it comes to the vicinity of a and 16a, it will rapidly come into elastic contact with the storage position using that point as moderation. In other words, proper fixation is achieved only in the storage position.

FIG. 8 shows the rotation angle position of the sun visor body in the storage position and operating position. As shown in FIG. 6B, the flat portion 13c of the leaf spring 13 and the cutout portion 16a of the shaft 16 come into contact, and a click-like action is performed. Also,
From the angle a to the fixed point on the front window side, that is, within the angle range b, Fig. 7A,
As shown in FIG. 7B, the notch 16 of the shaft 16
Since the outer circumferential surface other than a comes into contact with the flat portion 13c of the leaf spring 13 with a moderate frictional force, no moderate fixation is achieved at all.

That is, in a sun visor equipped with a bearing portion as described above, the angle can be adjusted over a very wide range by using a strong torque.

In this embodiment, the flat portions are described as a pair, but the flat portions are not limited to this, and there may be one or more pairs as long as they are alternate, and the alternate flat portions may partially overlap.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing the bearing part of a conventional sun visor, FIGS. 2A and 2B are explanatory sectional views showing the relationship between the shaft and the leaf spring during movement, FIGS. 3A and 3B, FIG. 3C is another example of a conventional sun visor bearing part, and is an explanatory cross-sectional view showing the relationship between the shaft and the leaf spring. FIG. 4 is an exploded perspective view showing the sun visor bearing part according to the present invention. Figure 5 is a side view of the sun visor when it is retracted, showing the assembled state, and Figures 6A and 6B are A-A in Figure 5.
Line and BB line sectional views, Figures 7A and 7B
The figures are a view corresponding to Figure 6A and a view corresponding to Figure 6B showing the relationship between the shaft and the leaf spring when the sun visor is in use, and Figure 8 is a view showing the angular position of the sun visor with the same bearing when it is installed inside the vehicle interior. It is an explanatory diagram. 10... Wire, 11... Shaft holder, 1
1a... Base, 11b... Bearing part, 13... Leaf spring, 13c... Flat part, 16... Shaft, 16
a... Notch.

Claims (1)

[Scope of Claims] 1. A shaft holder which forms a bearing part and has a sun visor core constituent member disposed at its base, and which covers an opening formed in the center of the bearing part of this shaft holder. A leaf spring having a substantially U-shaped cross section with both leg ends fixed to the base, and a shaft fitted into a bearing portion and abutting against an inner surface of the leaf spring to rotatably hold the shaft holder. In the bearing structure for an automobile sun visor, flat portions are formed alternately along the axial direction of the shaft on both sides of the leaf spring, and the flat portions protrude inside the opening of the shaft holder. A bearing structure for a sun visor for an automobile, characterized in that a flat notch is formed in correspondence with the flat part of the leaf spring and comes into contact with the flat part.