JP2010036668A - Sun visor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sun visor restraining a visor body from drooping. <P>SOLUTION: This sun visor 1 comprises: the visor body 2; a spindle 5 inserted in the visor body and rotatably supporting the visor body; and a clip 3 rotatably inserted in the spindle 5 between the visor body and the spindle. The spindle has an outer circumference arc face 5c, and an outer circumference end face 5d connected to the outer circumference arc face. A depressed part 23 depressed inward in an arc shape at a portion the outer circumference arc face of the spindle contacts, is formed on the clip, and the ratio (r/d) of radius (r) of the depressed part and the diameter (d) of the spindle is 1.4-3.8. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a sun visor, and more particularly to a sun visor that can suppress the occurrence of sagging of a visor body.

  2. Description of the Related Art Conventionally, as a vehicle sun visor for an automobile or the like, a vehicle including a visor body and a clip provided on the visor body and inserted into a support shaft is known (for example, see Patent Document 1). In Patent Document 1, a clip formed by bending a metal plate material into a cylindrical shape is inserted into a support shaft provided on a ceiling portion of a passenger compartment, and a visor body is mounted on a vehicle by frictional resistance between the clip and the support shaft. It is disclosed that the support is rotatably provided between a storage position along the ceiling and a front position along the windshield.

  In the conventional sun visor, as a clip, for example, as shown in FIGS. 9 and 10, a clip 103 in which a flat portion 123 is formed at a portion where the outer peripheral arc surface 105 c of the support shaft 105 contacts is generally known. Yes. The flat portion 123 is elastically deformed so as to swell in an arc shape toward the outside by contact with the outer peripheral arc surface 105 c of the support shaft 105. In addition, it has been proposed to use a resin-made support shaft in consideration of the environment and the like. The support shaft 105 normally has an outer circumferential arc surface 105c and an outer circumferential end surface 105d that is continuous with the outer circumferential arc surface 105c and is slit.

JP 2003-182360 A

  However, in the conventional sun visor, the flat portion 123 of the clip 103 is elastically deformed so as to bulge outward toward the outside by contact with the outer peripheral circular arc surface 105 c of the support shaft 105. And the outer peripheral circular arc surface 105c of the support shaft 105 come into contact with each other in a relatively wide surface area. Therefore, if the visor body is left at a certain angular position (for example, the front position) in a high temperature environment for a long time, the outer peripheral circular arc surface of the resin-made support shaft 105 is caused by the load from the flat portion 123 of the clip 103. 105c may be crushed in a relatively wide range. Then, due to the extensive collapse of the outer peripheral circular arc surface 105c of the support shaft 105, the frictional resistance between the outer peripheral circular arc surface 105c of the support shaft 105 and the flat portion 123 of the clip 103 decreases, and the visor body cannot be held in position and hangs down. May occur.

  This invention is made | formed in view of the said present condition, and an object of this invention is to provide the sun visor which can suppress generation | occurrence | production of the sag of a visor main body.

  The present inventors confirmed the collapsed shape of the outer peripheral arc surface of the support shaft from the reproducibility evaluation of the hanging of the visor body, and as a result, the outer periphery of the support shaft can be formed by forming a recess recessed in an arc shape toward the inside. In addition to finding out that the crushing range of the arc surface can be narrowed, the correlation between the ratio (r / d) of the radius (r) of the concave portion of the clip to the diameter (d) of the support shaft and the rotational torque of the visor body is examined in detail. As a result, the present invention has been completed.

The present invention is as follows.
1. The visor body,
A spindle inserted into the visor body and rotatably supporting the visor body;
A clip that is inserted between the visor body and the support shaft so as to be able to rotate.
The support shaft has an outer circumferential arc surface and an outer circumferential end surface connected to the outer circumferential arc surface;
The clip is formed with a recess recessed in an arc toward the inside at a portion where the outer peripheral arc surface of the support shaft contacts, and the radius (r) of the recess and the diameter (d) of the support shaft The sun visor characterized by the ratio (r / d) of 1.4 to 3.8.
2. The concave portion is substantially flat when the outer peripheral arc surface of the support shaft comes into contact with the concave portion. The listed sun visor.

According to the sun visor of the present invention, since the concave portion recessed in an arc shape toward the inside is formed in the portion where the outer peripheral arc surface of the support shaft of the clip contacts, the recess of the clip is inserted in the state where the clip is inserted into the support shaft. It can be made substantially flat by contact with the outer peripheral arc surface of the support shaft, or can be expanded in an arc shape outward or inward with an extremely large radius of curvature. Therefore, compared to the conventional clip formed with a flat portion, the contact surface area between the concave portion of the clip and the outer peripheral arc surface of the support shaft can be narrowed, and the collapse range of the outer peripheral arc surface of the support shaft can be reduced. Can do. Further, since the ratio (r / d) between the radius of the concave portion of the clip and the diameter of the support shaft is 1.4 to 3.8, a necessary and sufficient frictional resistance is provided between the clip and the outer peripheral circular arc surface of the support shaft. As a result, a predetermined rotation torque can be applied to the visor body. As a result, even when the visor body is left at a certain angular position in a high temperature environment for a long time, it is possible to prevent the visor body from sagging. Furthermore, since a clip formed with recesses with the same number of parts, man-hours, etc. can be created as compared with a clip formed with a flat part as in the prior art, an increase in production cost can be suppressed.
In addition, when the concave portion is substantially flat when the outer peripheral arc surface of the support shaft comes into contact, the contact between the clip concave portion and the outer peripheral arc surface of the support shaft can be a line contact. The crushing range of the outer peripheral arc surface can be further narrowed.

1. Sun visor Embodiment 1 The sun visor according to the present invention includes a visor body, a support shaft, and a clip described below. Although the use of this sun visor is not particularly limited, it is preferably used as a sun visor for vehicles such as automobiles and trains.

  The “visor main body” is not particularly limited in its structure, size, shape, material, quantity, etc. as long as it shields light. The visor main body can be rotatably supported between a storage position along the ceiling portion and a front position along the windshield, for example, by a support shaft provided on the ceiling portion of the passenger compartment (FIG. 7). reference).

  As long as the “support shaft” is inserted into the visor main body and rotatably supports the visor main body, the structure, size, shape, material, quantity, etc. are not particularly limited. The support shaft has an outer circumferential arc surface and an outer circumferential end surface connected to the outer circumferential arc surface. This spindle can be made of resin, for example. The type of this resin is not particularly limited. That is, as the resin, for example, polyamide resin, polyester resin, polyolefin resin, polyphenylene sulfide resin, polysulfone resin, polyethersulfone resin, polyacrylate resin, polyamideimide resin, polyimide resin, polyresin Examples thereof include vinyl acetate resins, polyurethane resins, polyether ether ketone resins, polyether resins, and polyvinylidene fluoride resins. The polyamide resin includes an aliphatic polyamide resin (such as nylon), an aromatic polyamide resin (such as an aramid resin), and a reinforced polyamide resin including an aromatic unit in a part of the main chain. Further, the polyester resin includes an aliphatic polyester resin, an aromatic polyester resin, and a reinforced polyester resin containing an aromatic unit in a part of the main chain. Of these, polyamide resins are preferred. Only 1 type may be used for resin and it may use 2 or more types together. Further, the resin may be the same as or different from the high molecular weight resin and / or the ultra high molecular weight resin. Examples of the polyamide-based resin include 6 nylon, 66 nylon, 610 nylon, and 612 nylon. These may be used alone, or a copolymer or blend thereof may be used.

  The resin can contain, for example, inorganic fibers. This inorganic fiber is not particularly limited, and various inorganic fibers can be used. Examples of the inorganic fiber include glass fiber, carbon fiber, and basalt fiber. Of these, glass fibers and carbon fibers are preferred because they are easy to obtain thin fibers. In addition, organic fibers that are not melted by heating, such as cotton and kenaf, can be mixed with the inorganic fibers. When mixing this organic fiber, when the total amount of the fiber is 100% by mass, the organic fiber is preferably 80% by mass or less, particularly preferably 70% by mass or less. The diameter of the inorganic fiber is not particularly limited, but is preferably 3 to 12 μm, particularly 5 to 12 μm, and more preferably 5 to 10 μm. If the diameter of the inorganic fiber is 3 to 12 μm, it can be a support shaft having sufficient thermal dimensional stability, rigidity, impact resistance and the like.

  The structure, size, shape, material, quantity, etc. of the “clip” are not particularly limited as long as the “clip” is inserted into the support shaft so as to be rotatable between the visor body and the support shaft. For example, the clip can be fixedly supported by a clip support portion provided in the visor body. This clip can be formed, for example, by bending a metal plate into a cylindrical shape.

The clip is formed with a recess recessed in an arc toward the inside at a portion where the outer peripheral arc surface of the support shaft contacts, and a ratio (r / d) between the radius of curvature r of the recess and the diameter d of the support shaft. ) Is 1.4 to 3.8 (see FIG. 8). This ratio (r / d) can be, for example, 1.6 to 3.6 (preferably 1.8 to 3.4). Thereby, the rotational torque of the visor body can be further increased (see FIG. 8). The radius of curvature r of the recess can be, for example, 14 to 38 mm (preferably 18 to 34 mm). The diameter d of the support shaft can be, for example, 8 to 12 mm (preferably 10 mm).
The arrangement of the recesses is not particularly limited. For example, in a state where the clip is not elastically deformed by the support shaft when the clip is inserted into the support shaft (see FIG. 5), the inner tip portion of the recess is supported. It can arrange | position so that the outer peripheral end surface of an axis | shaft may be touched. Further, for example, when the clip is not elastically deformed by the support shaft when the clip is inserted into the support shaft (see FIG. 5), the concave portion has a center of curvature passing through the shaft center of the support shaft and an outer peripheral end surface. It can arrange | position so that it may be located on the straight line orthogonal to.
The “inner side” means the center side of the support shaft inserted into the clip.

Here, the said recessed part can become a substantially flat shape, when the outer peripheral circular arc surface of a spindle contacts, for example. The ratio (r / d) in this case can be, for example, 1.8 to 2.2 (see FIG. 8).
The “substantially flat shape” is intended to include an arc state having an extremely large radius of curvature in addition to a flat state.

  Hereinafter, the present invention will be specifically described with reference to the drawings. In the present embodiment, a vehicle sun visor applied to a driver's seat and a passenger seat of an automobile is illustrated as a “sun visor” according to the present invention.

(1) Configuration of vehicle sun visor A vehicle sun visor 1 according to this embodiment includes a plate-like visor main body 2 and a visor main body 2 inserted into the visor main body 2 as shown in FIGS. A support shaft 5 that is movably supported, and a clip 3 that is inserted between the visor body 2 and the support shaft 5 so as to be capable of rotating, are provided. The support shaft 5 is formed in a substantially L shape having a vertical axis 5a and a horizontal axis 5b. The visor body 2 is rotatably mounted on the horizontal shaft 5b. The longitudinal axis 5 a is rotatably mounted on the vehicle interior ceiling 7 via the mounting bracket 6. Therefore, the visor body 2 is rotated around the horizontal axis 5b of the support shaft 5 so that the position between the storage position P along the ceiling portion 7 and the front position Q along the windshield 8 as shown in FIG. And is rotated about the vertical axis 5a so as to be rotated to a side position (not shown) along the side glass. As shown in FIGS. 2 and 3, the horizontal axis 5a of the support shaft 5 includes an outer peripheral arc surface 5c and a planar outer peripheral end surface 5d that is continuous with the outer peripheral arc surface 5c in the circumferential direction and is slit. And have. The outer peripheral end surface 5 d is formed over the width of the clip 3. The support shaft 5 is made of a polyamide-based resin containing glass fibers.

  As shown in FIGS. 2 and 3, the visor body 2 includes a pair of shell-like divided bodies 9a and 9b that are joined with their outer peripheral edges butting each other, and the outer surfaces of these divided bodies 9a and 9b. And a covering skin 10. An inner portion 11 is integrally provided on the inner surface (rear surface) side of one divided body 9a. The internal portion 11 includes a clip support portion 12 that supports the clip 3 and a bearing portion 13 into which the support shaft 5 is inserted. The clip support portion 12 is provided with a plurality of (for example, two) insertion portions 14 into which the leg portions 21 of the clip 3 are press-fitted from above. Further, a groove 16 extending in the left-right direction is formed on the lower surface side of the clip support portion 12. Then, the clip 21 is clipped to the clip support 12 by inserting the leg portion 21 of the clip 3 into the insertion portion 14 and inserting the rod-like member 17 into the leg 21 protruding below the clip support 12 and the groove 16. 3 is prevented from coming off.

  As shown in FIG. 4, the clip 3 is formed in a cylindrical shape by bending one end of a metal leaf spring so that the other end is wound, and overlapping one end surface and the other end surface. . The clip 3 includes an elastic engagement portion 20 having a substantially C-shaped longitudinal section engaged with the support shaft 5 with elastic deformation, and the leg portion having a substantially U-shaped longitudinal section connected to the elastic engagement portion 20. 21. As shown in FIGS. 5 and 6, the elastic engagement portion 20 is recessed in an arc shape toward the inside (that is, the center side of the support shaft 5) at a portion where the outer peripheral arc surface 5 c of the support shaft 5 contacts. A recess 23 is formed.

  In a state where the elastic engagement portion 20 is not elastically deformed by the support shaft 5 when the elastic engagement portion 20 is inserted into the support shaft 5 (see FIG. 5), the inner tip portion of the recess 23 is the support shaft 5. The center of curvature is disposed on a straight line passing through the axis of the support shaft 5 and orthogonal to the outer peripheral end surface 5d. On the other hand, in a state where the elastic engagement portion 20 is elastically deformed by the support shaft 5 when the elastic engagement portion 20 is inserted into the support shaft 5 (see FIG. 6), the concave portion 23 is an outer peripheral arc of the support shaft 5. The contact with the surface 5c results in a substantially flat shape. The diameter d of the support shaft 5 is 10 mm, and the radius of curvature r of the recess 23 is 20 mm. Therefore, the ratio (r / d) between the radius r of the recess 23 and the diameter d of the support shaft 5 is “2”.

(2) Operation of vehicle sun visor Next, the operation of the vehicle sun visor 1 having the above-described configuration will be described.
As shown in FIG. 3, in a state where the elastic engagement portion 20 of the clip 3 is inserted into the support shaft 5, the elastic engagement portion 20 is expanded with elastic deformation by the outer circumferential arc surface 5 c of the support shaft 5. At this time, the recess 23 of the clip 3 is substantially flat due to contact with the outer peripheral circular arc surface 5 c of the support shaft 5. When the clip 3 is rotated around the axis of the support shaft 5 together with the visor body 2, a necessary and sufficient frictional resistance is obtained between the elastic engagement portion 20 of the clip 3 and the outer peripheral circular arc surface 5 c of the support shaft 5. A predetermined rotation torque (for example, 0.9 N · m) is applied to the visor body 2.

  Further, when the clip 3 is rotated around the axis of the support shaft 5 together with the visor body 2, the outer peripheral end surface 5 d of the support shaft 5 is brought into contact with and separated from the concave portion 23 of the clip 3. When the outer peripheral end surface 5d of the support shaft 5 is brought into contact with the recess 23 of the clip 3, the amount of expansion of the clip 3 becomes the smallest, and this state is the most stable state of the clip 3. Therefore, the clip 3 tends to come into contact with the outer peripheral end surface 5 d of the support shaft 5 by the elastic force of the clip 3, and the visor body 2 is urged to a predetermined rotational position of the support shaft 5. For example, the visor body 2 is biased toward the storage position P (shown by a solid line in FIG. 7) along the vehicle interior ceiling 7.

(3) Effects of the embodiment According to the vehicle sun visor 1 of the present embodiment, the concave portion 23 that is recessed in an arc shape toward the inside is formed at the portion where the outer peripheral arc surface 5c of the support shaft 5 of the clip 3 contacts. With the clip 3 inserted into the support shaft 5, the concave portion 23 of the clip 3 can be made substantially flat by contact with the outer peripheral arc surface 5 c of the support shaft 5. Therefore, the contact surface area between the concave portion 23 of the clip 3 and the outer peripheral circular arc surface 5c of the support shaft 5 can be made narrower than the clip 103 (see FIGS. 9 and 10) formed with the flat portion 123 as in the prior art. The collapse range of the outer peripheral arc surface of the support shaft 5 can be narrowed. In this embodiment, since the ratio (r / d) between the radius r of the elastic engagement portion 20 of the clip 3 and the diameter d of the support shaft 5 is “2”, the recess 23 of the clip 3 and the support shaft 5 Necessary and sufficient frictional resistance can be obtained between the outer peripheral arc surface 5c and the visor body 2 with a predetermined rotational torque (for example, 0.9 N · m). As a result, even when the visor body 2 is left at a certain angular position for a long time in a high temperature environment, the occurrence of the visor body 2 can be suppressed. Furthermore, compared with the clip 103 formed with the flat plate portion 123 as in the prior art, the clip 3 formed with the recess 23 with the same number of parts, man-hours, etc. can be created, so that an increase in production cost can be suppressed. it can.

  Further, in this embodiment, the concave portion 23 of the clip 3 is substantially flat when the outer peripheral arc surface 5c of the support shaft 5 comes into contact. The contact with 5c can be a line contact, and the collapse range of the outer peripheral circular arc surface 5c of the support shaft 5 can be further narrowed.

(4) Correlation between the ratio (r / d) of the radius r of the concave portion of the clip to the diameter d of the support shaft and the rotational torque Next, the ratio (r / d) examined in detail by the present inventors and the rotation. The correlation with the dynamic torque will be described.
First, as a study sun visor, as shown in FIGS. 5 and 6, a sun visor provided with a clip 3 formed by forming a concave portion 23 recessed in an arc toward the inside at a portion where the outer peripheral arc surface 5 c of the support shaft 5 contacts. Prepare 1 '. As the clip 3, 12 types are prepared in which the radius r of the recess 23 is 4 mm, 10 mm, 12 mm, 14 mm, 16 mm, 18 mm, 20 mm, 22 mm, 24 mm, 26 mm, 30 mm, and 40 mm. The support shaft 5 has a diameter d of 10 mm.

  Next, as shown in FIG. 7, the sun visor 1 'is set on a jig so as to coincide with the vehicle mounting state. Next, the sun visor 1 'is positioned at the front position Q along the windshield 8, and the tip position angle of the sun visor 1' is measured. The front position Q is a position rotated by 200 degrees from the reference position S where the clip 3 is in a free state.

  Thereafter, (a) the ambient temperature of the sun visor 1 ′ at the front position Q is set to 80 ° C. and left for 6 hours. Next, (b) the rotation operation between the front position Q and the front front position R is repeated 100 times in an environment where the atmospheric temperature is 80 ° C. with a 200 g weight fixed to the sun visor 1 ′. Next, (c) with the 200 g weight fixed, the ambient temperature of the sun visor 1 ′ at the front position Q is set at 23 ° C. and left for 8 hours. The front front position R is a position rotated 180 degrees from the reference position S.

  Thereafter, a series of the above cycles (a) to (c) is performed for three cycles. After the end of each cycle, the tip position angle of the sun visor 1 ′ was measured with the 200 g weight removed. This was performed for all 12 types of clips 3. Based on the difference between this measured value and the first measured value, it was found that the sag angle (amount) was 2 to 7 °, that is, almost no sag occurred.

  In addition, a series of the above cycles (a) to (c) is carried out for three cycles, and the torque applied to the visor body 2 in a state in which a 200 g weight is removed after the completion of each cycle, is a well-known torque measuring device. And the degree of elastic deformation of the recess 23 of the clip 3 was confirmed. This was performed for all 12 types of clips 3. As a result, as shown in FIG. 8, the ratio (r / d) is 1. in order to secure 0.75 N · m or more as the rotational torque (minimum torque) necessary for holding the position of the visor body 2. 4 to 3.8, and the ratio (r / d) is 1.6 to 3.6 in order to secure a rotation torque of 0.8 N · m or more, and the rotation torque is 0.85 N. It was found that the above ratio (r / d) was 1.8 to 3.4 to ensure m or more. Furthermore, it was found that the ratio (r / d) in the case where the concave portion 23 of the clip 3 becomes substantially flat due to contact with the outer circumferential arc surface 5c of the support shaft 5 is 1.8 to 2.2.

  In the present invention, the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention depending on the purpose and application. That is, in the above-described embodiment, the concave portion 23 of the clip 3 that is substantially flat when the outer peripheral circular arc surface 5c of the support shaft 5 comes into contact is illustrated. However, the present invention is not limited to this, and for example, the ratio (r / d) As long as is in the range of 1.6 to 3.8, the concave portion 23 of the clip 3 that has an arc shape when the outer peripheral arc surface 5c of the support shaft 5 comes into contact may be used.

  Moreover, in the said Example, although the form which provides the one recessed part 23 over substantially full length of the left-right width of the clip 3 was illustrated, it is not limited to this, For example, several recessed part 23 is provided along the left-right width direction of the clip 3. You may make it adjoin.

  It is widely used as a technology related to sun visors that exhibit a light shielding function. In particular, it is suitably used as a vehicle sun visor.

It is a top view of the vehicle sun visor which concerns on a present Example. It is a principal part expanded sectional view of FIG. It is the III-III sectional view taken on the line of FIG. It is a perspective view of the clip concerning a present Example. It is a longitudinal cross-sectional view which shows the said clip of a free state. It is a longitudinal cross-sectional view which shows the said clip of an elastically deformed state. It is explanatory drawing for demonstrating the examination method of the correlation with ratio of the radius of the recessed part of a clip with respect to the diameter of a spindle, and rotational torque. It is a graph which shows the correlation with the ratio of the radius of the recessed part of a clip with respect to the diameter of a spindle, and the rotational torque of a visor main body. It is a longitudinal cross-sectional view which shows the conventional clip of a free state. It is a longitudinal cross-sectional view which shows the clip of the conventional elastic deformation state.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1; Vehicle sun visor, 2; Visor main body, 3; Clip, 5; Support shaft, 5c; Outer circular arc surface, 5d: Outer peripheral end surface, 23: Recess, r: Recess radius, d;

Claims (2)

The visor body,
A spindle inserted into the visor body and rotatably supporting the visor body;
A clip that is inserted between the visor body and the support shaft so as to be able to rotate.
The support shaft has an outer circumferential arc surface and an outer circumferential end surface connected to the outer circumferential arc surface;
The clip is formed with a recess recessed in an arc toward the inside at a portion where the outer peripheral arc surface of the support shaft contacts, and the radius (r) of the recess and the diameter (d) of the support shaft The sun visor characterized by the ratio (r / d) of 1.4 to 3.8.   The sun visor according to claim 1, wherein the concave portion is substantially flat when an outer peripheral arc surface of the support shaft comes into contact therewith.

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