JPS6246570Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Field of the Invention>> This invention relates to an improvement in the bearing structure of a sun visor for an automobile, and in particular, the bearing structure of the sun visor which allows the angular posture of the sun visor to be freely adjusted during use.

《Prior art and its problems》 The conditions required for automobile sun visors are that the shaft and sun visor should have sufficient frictional holding power to prevent them from falling unexpectedly from the ceiling and obstructing visibility due to automobile vibrations, etc. In addition, it is desirable that the frictional holding force is not reduced even if the folding and unfolding operations are repeated, and that a light click-action motion be performed each time the rotation operation is performed.

Conventionally, the structure of a shaft holder for this purpose is as shown in FIG. 1, in which a metal plate is bent to form a loop-shaped bearing part 1a, and a wire 2 forming a peripheral frame is attached to a base part 1b at the lower end of the bearing part 1a. and fixing both ends of the bearing part 1a, and forming an opening in the center of the bearing part 1a,
A plate spring 3 whose both sides are flattened is attached to this opening 1c. Moreover, the tip of the shaft 4 fitted with this has notches 4a, 4a on both sides.
is formed, and is fitted and fixed to the bearing part 1a so that the notch part 4a abuts both inner walls of the leaf spring 3, and when the sun visor is stored along the ceiling surface. , the notch 4a of the shaft 4 comes into contact with the inner wall of the leaf spring 3 as shown in FIG. 2A, so that the sun visor is in a stable state, and by rotating the sun visor downward from this retracted state, as shown in FIG. 2B As shown in the figure, the shaft 4 causes the leaf spring 3 to bulge outward, thereby increasing the frictional engagement force between the two.

That is, the sun visor with such a configuration can be fixed with moderation as shown in FIG. 2A when it is stored on the ceiling surface, but on the other hand,
Although not shown, the sun visor is 180 degrees from the retracted state.
Even when used in the rotated position, the notch 4a of the shaft 4 and both inner walls of the leaf spring 3 are in contact with each other, so that they 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. It has been pointed out that when fixed with moderation like this, the angular posture can only be adjusted at one point, and it is not possible to set it freely according to the sunlight angle.

Furthermore, in view of these points, a bearing structure as shown in FIG. 3 has also been proposed. This one forms a flat part 3A only on one side, and has a plate spring 3,
When the sun visor is retracted along the ceiling surface, it is in the state shown in FIG. 3A, and the flat part 3A of the leaf spring 3 is The notch 4A of the shaft 4 comes into contact with the shaft 4, and stable and moderate fixation is achieved. From this state, by rotating the sun visor downward with respect to the shaft 4, the shaft 4 is fixed as shown in FIG. 3B. The circular arc portion 4b of 4 is the leaf spring 3
This makes it come into contact with the flat portion 3A of the holder, so that it cannot be properly fixed in the operating position.

However, even with such a structure, in the position shown in FIG. 3C, which is rotated 180 degrees from the storage position shown in FIG. It has been pointed out that the shortcoming is that a relatively weak click force is generated due to the abutment, and that this also becomes a moderate fixed 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 arcuate portion 3b is pulled in the direction of the arrow as shown in FIGS. 3B and 3C. Therefore, it has been pointed out that the frictional torque between the leaf spring 3 and the shaft 4 changes depending on the angular posture, so that a smooth rotation operation cannot be performed.

《Purpose of the invention》 This invention was made in view of the above-mentioned circumstances.The purpose of the invention is that when the sun visor body is lowered from the ceiling, its angular posture can be set freely and To provide a bearing structure for a sun visor for an automobile whose angular attitude can be adjusted with strong torque and which eliminates torque deviation due to rotation angle.

<<Structure and Effects of the Invention>> In order to achieve the above object, the bearing structure of the automobile sun visor according to the present invention includes a shaft holder that forms a bearing part and a shaft holder in which the core structural member of the sun visor is disposed at the base of the bearing part. , a leaf spring that covers an opening formed in the center of the bearing of the shaft holder and has its lower part fixed to the base; In the shaft holder that rotatably holds the shaft holder, the spring portion of the leaf spring has a loop shape, and flat portions projecting inside the opening of the shaft holder are provided on both sides of the circumferential surface of the spring portion. The loop-shaped center of the spring portion is formed to be biased to one side with respect to the axis of the shaft, and opposite to this, the shaft is provided with a loop-shaped center when the sun visor is stored. It is characterized in that a flat notch is formed on one side in the longitudinal direction of the flat part of the leaf spring so as to come into contact with the flat part on the opposite side to the biased side.

That is, in the automotive sun visor bearing structure according to this invention, flat parts are formed on both sides of the circumferential surface of the spring part and project into the inside of the opening of the shaft holder, and the loop-shaped center of the spring part is formed. The shaft is formed to be mounted offset to one side with respect to the axis, and opposite to this, the shaft has a flat part on the opposite side to the offset side of the flat part of the leaf spring when the sun visor is stored. A flat notch that comes into contact with the shaft is cut out on one side of the shaft in the longitudinal direction, so the center of the loop of the conventional leaf spring is biased to one side with respect to the center of the shaft. There is no torque deviation, and the angular posture can be adjusted with uniform and strong torque. Therefore, there are no complaints such as the sun visor body unexpectedly coming down from the ceiling of the car, and the torque at the contact surface between the shaft and the leaf spring is uniform and strong at any rotational position, making operation easier. It has advantages such as good properties and the ability to be held and fixed in any position.

<Description of Embodiments> Hereinafter, one embodiment of a sun visor bearing structure according to the present invention will be described in detail with reference to FIG. 4 and subsequent drawings.

In FIG. 4, the sun visor body includes a wire 10 bent to form a frame periphery, and a wire 10 that is bent to form a frame periphery.
It has a shaft holder 11 whose both ends are integrally fixed to its base 11a.

At the top of this shaft holder 11, bearing parts 11b, 11b curved into a loop shape are formed, and an opening is formed on both sides of the central part, and a leaf spring 13 is installed in this opening 12. The shaft 16, which is fitted into the bearing portion, is held under pressure by the leaf spring 13.

The plate spring 13 has a pair of locking pieces 14, 14 integrally formed on both sides of its base 13a, and which slopes upward.
A pair of protrusions 15, 15 into which the locking pieces 14 are fitted are integrally formed on both sides of the base 11a. This protrusion 15 has a locking hole 15a.
A notch is formed, and the plate spring 13 is fixed to the shaft holder 11 by engaging the locking piece 14 with this locking hole 15a.

Further, in order to fit and fix the loop-shaped center of the leaf spring 13 to one side with respect to the axis of the shaft 16, the convex portions 15, 15 are arranged such that the degree of protrusion from the shaft holder base 11a is adjusted to one side. The convex portion is formed to protrude more than the one on the other side.

Moreover, flat portions 13c, 13c are formed on both sides of the loop-shaped spring-like portion 13b integrally connected from the base portion 13a of the leaf spring 13,
On the other hand, the shaft 16 is formed with a flat notch 16a on one side in the longitudinal direction, which abuts one of the flat parts 13c, 13c of the leaf spring 13.

Therefore, when the sun visor is stored along the ceiling surface, the notch 16a formed in the shaft 16 is inserted into the leaf spring 13 as shown in FIG. 5A.
By abutting against the flat portion 13c on the opposite side to the biased side of the flat portion 13c formed in the sun visor, moderate fixing is possible, and there is no problem such as the sun visor body unexpectedly coming down from the ceiling surface.

Furthermore, when the main body of the sun visor is lowered from the ceiling surface and adjusted to a desired angular posture, the main body side consisting of the shaft holder 11 and the wire 10 is rotated with respect to the shaft 16 to adjust the angle. For example, as shown in FIG. 5B, one of the flat parts 13c, 13c of the leaf spring 13 comes into contact with the outer periphery of the shaft 16, and in this case, the flat part 13c curves and bulges outward, and its contact point The required friction torque can be obtained between the two.

Further, due to the curvature of the flat portion 13c, a force that presses the shaft 16 in the opposite direction to the bulging side of the flat portion 13c is generated as a reaction force. The outer circumferential surfaces of 16 are pressed against each other, and friction torque is generated here as well.

Furthermore, as the sun visor body is rotated,
As shown in FIG. 5C, the flat portion 13 of the leaf spring 13
Although the degree of curvature of c increases, the degree of pressure contact between the flat portion 13c and the outer circumferential surface of the shaft 16 is moderated by appropriately elongating the arc portion of the leaf spring 13 in the direction of the arrow, and the friction torque is always uniform. When the sun visor body rotates, an average friction torque can be obtained for any rotation angle.

Next, when storing the sun visor, rotate the sun visor main body side upward, and when the flat part 13c of the leaf spring 13 comes near the notch 16a of the shaft 16, adjust the point. As,
Among the flat portions 13c of the leaf spring 13, the flat portion 13c on the opposite side to the biased side and the cutout portion 16a of the shaft 16 resiliently abut, and return to the position shown in FIG. 5A.
In other words, it is properly fixed in the storage position.

Figure 6 shows the rotational angle position of the sun visor body in the storage position and operating position. Due to the relationship between the leaf spring 13 and the shaft 16 shown,
A click-like action is performed.

Furthermore, as shown in FIGS. 5B and 5C, between the angle a and the fixed point on the front window side, that is, within the angle range b, the leaf spring
Since the flat portion 13c of No. 3 is curved, moderate fixation cannot be achieved.

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.

FIG. 7 is a diagram showing another embodiment of the present invention.

In this embodiment, the shaft holder 21 and the branch portion 20 corresponding to the wire 10 of the previous embodiment are integrally molded from synthetic resin. Furthermore, a plate spring 23 with flattened sides is attached to the opening 22 of the shaft holder 21.

The leaf spring 23 has a locking piece 2 at its base 23a.
4 and 24 are cut and raised, and a locking hole 25 for fitting these locking pieces 24 and 24 is provided.
The plate spring fixing shaft 2 is fixed to the opening 22 of the shaft holder 21 by the locking spring 25 having a U-shaped cross section and openings formed at the center of both sides of the shaft holder 25a and 25a.
It is attached and fixed to 1a.

This plate spring fixing shaft 21a is arranged so that its center is aligned with the loop-shaped center of the plate spring 23 in order to bias the loop-shaped center of the plate spring 23 to one side with respect to the shaft axis as shown in FIG. It is formed unevenly.

In this example as well, as in the previous example,
Sun visor operating position b as shown in Figure 6
In this case, a uniform and strong friction torque is always obtained, and the angle can be freely adjusted, and a click-like operation is performed near the storage position a to store the product.

[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 rotation, and Figs. 3A and 3B. , FIG. 3C is another example of a conventional sun visor bearing part, and is an explanatory sectional view showing the relationship between the shaft and the leaf spring, and FIG. 4 is an exploded perspective view showing the sun visor bearing part according to the present invention. Figures 5A, 5B, and 5C are explanatory cross-sectional views showing the relationship between the shaft and the leaf spring, and Figure 6 shows the angular position of the sun visor having the same bearing when it is installed inside the vehicle interior. Explanatory diagram, 7th
The figure is a perspective view showing another embodiment of the present invention, and FIG. 8 is an explanatory sectional view showing the relationship between the shaft and the leaf spring. 10... Wire, 11, 21... Shaft holder, 11a... Base, 11b... Bearing part, 13,
23...Plate spring, 13c, 23c...Flat part, 1
6... Shaft, 16a... Notch, 20... Branch-shaped part, 21a... Leaf spring fixing shaft, 15... Convex part,
25... Locking spring, 15a, 25a... Locking hole.

Claims (1)

[Scope of utility model registration request] A shaft holder which forms a bearing part and has a sun visor core structure member disposed at its base, covers an opening formed in the center of the bearing part of this shaft holder, and fixes its lower part to the base part. The shaft holder is provided with a leaf spring and a shaft that is fitted into a bearing portion and rotatably holds the shaft holder by contacting the inner circumferential surface of the leaf spring, wherein the spring portion of the leaf spring has a loop shape. flat parts protruding inside the opening of the shaft holder are formed on both sides of the inner periphery, and the loop-shaped center of the spring part is biased to one side with respect to the axis of the shaft. The shaft is formed so as to be mounted on the shaft, and the shaft has a
A sun visor for an automobile, characterized in that a flat notch is formed on one side of the leaf spring in the longitudinal direction so as to come into contact with a flat part of the flat part of the leaf spring on the opposite side to the biased side when the sun visor is stored. Bearing structure.