JP5888516B2 - Vehicle sun visor - Google Patents

Description

  The present invention relates to a vehicle sun visor, and more particularly to a technique for holding a sun visor body in a use position.

  Usually, a vehicle is provided with a sun visor as an awning obliquely above each of a driver seat and a passenger seat. Conventionally, various techniques for maintaining the position of a sun visor body in a vehicle sun visor are known (see, for example, Patent Document 1).

  FIG. 7 is a diagram illustrating a vehicle sun visor described in Patent Document 1. A vehicle sun visor 100 includes a sun visor body 101 and a shaft 102 that is provided on a vehicle body and rotatably supports the sun visor body 101. The support 103 is attached to the sun visor main body 101, and the leaf spring 105 is attached to the support 103 and fitted to the shaft 102.

  The leaf spring 105 includes a curved spring body 106, and the spring body 106 has two inner surfaces 107 and 108 facing each other. One inner surface 107 is a concave curved surface along the peripheral surface 111 of the shaft 102, and the other inner surface 108 is a concave curved surface formed with a radius of curvature larger than the radius of curvature of the peripheral surface 111 of the shaft 102. is there.

  According to the vehicle sun visor 100, the shaft 102 is clamped between the two inner surfaces 107 and 108 of the spring body 106, and the frictional force generated between the peripheral surface 111 of the shaft 102 and the leaf spring 105 is utilized by the tightening force. Then, the use position of the sun visor main body 101 that is rotated around the shaft 102 is held.

  By the way, while the quality improvement of the sun visor for vehicles is calculated | required, the technique of hold | maintaining a sun visor main body more reliably in a use position is calculated | required.

Japanese Patent No. 4729724

  In the vehicle sun visor 100 described in Patent Document 1, the inner surface 107 is in surface contact with the peripheral surface 111 of the shaft 102, but the inner surface 108 is in line contact with the peripheral surface 111. That is, on the inner surface 108, the peripheral surface 111 and the inner surface 108 come into contact with each other at the thin linear portion 112. For this reason, a sufficient frictional force may not be obtained between the spring body 106 and the peripheral surface 111, and it is necessary to take some measures. In particular, when the mass of the sun visor main body 101 is large, if the frictional force is insufficient, the rotational torque of the sun visor main body 101 is reduced, and the sun visor main body 101 is not held, but a problem of hanging down occurs. It is rare.

  Therefore, the present invention has been made in view of such circumstances, and an object of the present invention is to provide a vehicle sun visor that increases the rotational torque of the sun visor body and more securely holds the sun visor body at the use position. It is in.

The feature of the former stage of the present invention (1) is grasped by the following configuration.
A sun visor for a vehicle having a sun visor body having an awning function, wherein the sun visor body is rotatably supported by a columnar rotation shaft, and the sun visor body is fitted on a circumferential surface of the rotation shaft. combined has a plate spring for imparting rotational torque to the sun visor body, the leaf spring is in opposition have a plate-like portion of a pair of sandwiching the rotating shaft, of the pair Each of the plate-like portions has substantially the same radius of curvature as the peripheral surface of the rotation shaft, and can apply a rotation torque to the sun visor body 11 by sandwiching the horizontal shaft portion of the rotation shaft. It is formed with a radius of curvature to be in surface contact with the peripheral surface of the rotating shaft, having a curved inner surface.

  According to this configuration, the curved curved inner surfaces of the pair of opposed plate-like portions are in surface contact with the peripheral surface of the rotation shaft, so that the contact area between the rotation shaft and the leaf spring is larger than that of the conventional case. It will be much larger. Thereby, the clamping force of the leaf | plate spring with respect to the shaft for rotation can be heightened, and a big frictional force can be obtained between the shaft for rotation and a leaf | plate spring. As a result, even if the mass of the sun visor body is large, the rotational torque of the sun visor body can be set high, so that the sun visor body can be more reliably held at the use position.

The features of the latter stage of the present invention (1) can be grasped by the following configuration.
The rotating shaft is provided with a flat portion for holding the sun visor body at a retracted position on the ceiling surface of the passenger compartment, and one plate-like portion of the pair of plate-like portions is inserted into the rotating shaft via a slit. A plurality of divided pieces arranged in the axial direction of the moving shaft, wherein the plurality of divided pieces hold a curved plate-shaped divided piece having a curved inner surface in surface contact with the rotating shaft, and the sun visor body. And a flat plate-like piece having a flat inner surface that fits with the flat portion of the rotating shaft when rotated to the retracted position .

  According to this configuration, one plate-like portion is constituted by a plurality of divided pieces, and among the plurality of divided pieces, the curved plate-like divided piece can increase the contact area between the rotating shaft and the leaf spring. In the segmented piece, the sun visor body can be held in the retracted position by fitting with the flat portion of the rotating shaft. Thereby, the function which hold | maintains a sun visor main body reliably in a storing position can be provided to a leaf | plate spring, maintaining the function which hold | maintains a sun visor main body more reliably in a use position.

The feature of the present invention (2) is grasped by the following configuration.
In the configuration of the former stage and the latter stage of the present invention ( 1) , the flat plate-like divided pieces are arranged on both the left and right sides with the curved plate-like divided pieces interposed therebetween.

  According to this configuration, since the plate-like divided pieces for securely holding the sun visor main body in the storage position are arranged on the left and right sides of the curved plate-like divided pieces for increasing the turning torque of the sun visor main body, the turning shaft The frictional force balance is improved in the axial direction. As a result, the operability of rotating the sun visor body can be improved.

  ADVANTAGE OF THE INVENTION According to this invention, the rotation torque of a sun visor main body can be raised, and the sun visor for vehicles which hold | maintains a sun visor main body more reliably in a use position can be provided.

It is a front view of the sun visor for vehicles of the embodiment concerning the present invention. It is the figure which extracted and showed the shaft for rotation and the leaf | plate spring from the structure of the vehicle sun visor shown by FIG. (A) is a front view of a leaf | plate spring, (b) is a rear view of a leaf | plate spring. It is AA sectional drawing of FIG. (A) is the B section enlarged view of FIG. 4, (b) is the C section enlarged view of FIG. It is DD sectional drawing of FIG. It is a figure explaining the basic composition of the conventional technology.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a mode for carrying out the present invention (hereinafter referred to as “embodiment”) will be described in detail with reference to the accompanying drawings. The same number is attached | subjected to the same element through the whole description of embodiment. In the embodiment, “front”, “rear”, “left”, and “right” respectively indicate directions viewed from the driver who gets on the vehicle.

The overall configuration of the vehicle sun visor according to the embodiment will be described.
FIG. 1 is a front view of a sun visor for a vehicle, and is a diagram showing an internal configuration by cutting a part of a sun visor main body. As shown in FIG. 1, the vehicle sun visor 10 according to the embodiment includes a sun visor body 11 having a sunshade function. The sun visor body 11 is provided so as to be retractable on the ceiling surface 12 (see FIG. 6) of the passenger compartment at a position obliquely above the driver seat or the passenger seat. The occupant rotates the sun visor body 11 to adjust the position and orientation, thereby preventing dazzling such as direct sunlight from the front window or side window.

Hereinafter, the configuration of each unit will be described in detail.
The vehicle sun visor 10 is a columnar rotation shaft 30 that rotatably supports the sun visor body 11, a leaf spring 40 provided inside the sun visor body 11, and a rotation shaft 30 for fixing the rotation shaft 30 to the vehicle body side. It is mainly composed of the bracket 13.

  The sun visor body 11 includes, for example, a sun visor core 15 and a sun visor skin 16 that wraps the outer surface of the sun visor core 15. A mirror unit 17 may be provided at the center of the sun visor body 11. Various materials can be used for the sun visor core 15, but considering the improvement of the impact absorbing function and the weight reduction, a bead foam molded body such as a polypropylene bead foam molded body or a polystyrene bead foam molded body is preferable. Moreover, it is preferable that the sun visor skin 16 is comprised with the material which has cushioning properties, such as a nonwoven fabric sheet, a cross sheet, and a resin sheet. Moreover, you may insert the loop-shaped wire frame 18 inside the sun visor core 15 as needed. Here, the sun visor main body 11 is configured by the sun visor core 15 and the sun visor skin 16, but the configuration of the sun visor main body 11 is arbitrary as long as it has a predetermined rigidity and awning function.

  The rotation shaft 30 is formed to be bent substantially in an L shape, and has a horizontal shaft portion 31 and a vertical shaft portion 32. The horizontal shaft portion 31 is a shaft portion extending in the left-right direction, and is inserted on the left and right sides (here, the left side) of the upper portion of the sun visor body 11. The vertical shaft portion 32 is connected to one end (here, the left end portion) of the horizontal shaft portion 31 through a bent portion, extends substantially vertically upward, and is inserted into the bracket 13.

  The leaf spring 40 is elastically fitted to the horizontal shaft portion 31 of the rotation shaft 30 by its elastic force. A rotation torque (rotation resistance) is applied to the sun visor body 11 by the elastic force of the leaf spring 40. With this rotational resistance, the sun visor body 11 can be positioned at an arbitrary rotational position. In addition, the further detailed structure of the shaft 30 for rotation and the leaf | plate spring 40 is mentioned later.

  The means for connecting the rotation shaft 30 to the sun visor body 11 is not particularly limited, and can be selected from various bearing structures used in known vehicle sun visors, and the type is arbitrary. Here, an example in which the bearing member 21 made of synthetic resin is provided inside the sun visor body 11 is shown.

  The bearing member 21 is molded into a predetermined shape by injection molding using a general-purpose synthetic resin such as polyacetal resin, polyamide resin, or polypropylene resin. In this example, the bearing member 21 includes a substantially U-shaped base portion 21a opened upward, and cylindrical left and right bearing portions 21b formed at both left and right end portions of the base portion 21a and facing each other at a predetermined interval. Composed. The left and right bearing portions 21b are fitted to the left and right ends of the horizontal shaft portion 31 of the rotation shaft 30 so as to be rotatable. As a result, the sun visor body 11 can be rotated around the horizontal shaft portion 31, and between the storage position of the ceiling surface 12 (see FIG. 6) of the passenger compartment and the use position deployed in a plane parallel to the front window. Position adjustment is possible.

  The bracket 13 is fixed to the vehicle body side and supports the vertical shaft portion 32 of the rotation shaft 30 so as to be rotatable. Thereby, the sun visor body 11 can be rotated around the vertical shaft portion 32, and the position can be adjusted between the front window and the side window.

  Next, the structure of the shaft 30 for rotation and the leaf | plate spring 40 is demonstrated in detail based on FIGS.

  As shown in FIG. 2, the rotation shaft 30 is a molded product in which a horizontal shaft portion 31 and a vertical shaft portion 32 are integrally formed, and is formed by, for example, injection molding using a general-purpose synthetic resin. The resin material used for the rotating shaft 30 is, for example, polyamide resin, polyethylene resin, polypropylene resin, polystyrene resin, polyethylene terephthalate resin, polyvinyl alcohol resin, vinyl chloride resin, polyacetal resin, polycarbonate. It can be arbitrarily selected from a series resin, an ionomer resin, an acrylonitrile / butadiene / styrene (ABS) resin, and the like. Furthermore, arbitrary fiber materials (for example, glass fiber etc.) may be mixed in the said resin material, and you may make it improve the abrasion resistance of the shaft 30 for rotation.

  A flat portion 33 that holds the sun visor body 11 is partially provided on the peripheral surface 35 of the horizontal shaft portion 31 at the storage position of the ceiling surface 12 (see FIG. 6). The number of the flat portions 33 and the position on the peripheral surface 35 are arbitrary, but in this example, the left and right flat portions 33 are separated from the upper portion of the peripheral surface 35 along the axial direction of the horizontal shaft portion 31. Provide.

  As shown in FIGS. 3A and 3B, the leaf spring 40 includes a fixing leg piece 41 attached to the bearing member 21 (see FIG. 1), and a shaft clamping portion 42 connected to the fixing leg piece 41. Consists of The leaf spring 40 is formed by, for example, pressing a metal plate such as a steel plate.

  The fixing leg piece 41 is formed in a U-shape that opens to the shaft clamping portion 42 side. The leaf spring 40 is disposed between the left and right bearing portions 21b (see FIG. 1), and the fixing leg piece 41 is fitted into the base portion 21a (see FIG. 1), so that the bearing member 21 (see FIG. 1) is fitted. Fixed.

  The shaft clamping portion 42 is formed in a predetermined cross-sectional shape (for example, a substantially U shape opened to the fixing leg piece 41 side) and is fitted to the peripheral surface 35 (see FIG. 2). The shaft clamping portion 42 has a pair of first plate-like portion 43 and second plate-like portion 45 that face and hold the horizontal shaft portion 31 (see FIG. 2). The 1st plate-shaped part 43 and the 2nd plate-shaped part 45 provide rotation torque to the sun visor main body 11 (refer FIG. 1) by clamping the horizontal axis | shaft part 31 (refer FIG. 2). In this example, in the sun visor body 11 (see FIG. 1) in the use position, the first plate-like portion 43 faces rearward and the second plate-like portion 45 faces frontward.

  Of the first plate-like portion 43 and the second plate-like portion 45, the first plate-like portion 43 is an axis of the horizontal shaft portion 31 (see FIG. 2) via a plurality of (in this example, two) slits 46. A plurality (three in this example) of divided pieces 43a and 43b are arranged in the direction. The second plate-like portion 45 has no slit and is not divided.

  The plurality of divided pieces 43a and 43b are configured by a curved plate-shaped divided piece 43a and flat plate-shaped divided pieces 43b arranged on both the left and right sides of the curved plate-shaped divided piece 43a. The left and right flat divided pieces 43b are provided at positions corresponding to the left and right flat portions 33 (see FIG. 2) in the axial direction of the horizontal shaft portion 31 (see FIG. 2).

  As shown in FIG. 4, the curved plate-shaped divided piece 43 a includes a curved inner surface 47 </ b> A that is in surface contact with the peripheral surface 35 of the rotation shaft 30 in an arbitrary angle range (indicated by reference sign θ <b> 1). The second plate-like portion 45 also includes a curved inner surface 47B that comes into surface contact with the peripheral surface 35 of the rotating shaft 30 in an arbitrary angle range (indicated by reference sign θ2). The curved inner surface 47 </ b> B is formed almost entirely inside the second plate-like portion 45.

  As shown in FIG. 5A, in the curved plate-like segment 43a, the curved inner surface 47A is formed with a radius of curvature R1 having the same size as the radius of curvature R of the peripheral surface 35 of the rotating shaft 30. The As shown in FIG. 5B, also in the second plate-like portion 45, the curved inner surface 47 </ b> B is formed with a radius of curvature R <b> 2 that is approximately the same size as the radius of curvature R of the peripheral surface 35. The angle range (FIG. 4, reference θ1) where the curved inner surface 47A is formed and the angle range (FIG. 4, reference θ2) where the curved inner surface 47B is formed can be arbitrarily set. Considering the stability of the turning operation of the sun visor body 11 (see FIG. 1), it is desirable to set θ1 and θ2 to substantially the same size.

  On the other hand, as shown in FIG. 6, the flat divided piece 43 b includes a planar inner surface 48. The planar inner surface 48 is aligned with the flat portion 33 when the sun visor body 11 is rotated to the retracted position of the ceiling surface 12 of the passenger compartment as indicated by the arrow (1). In this way, the planar inner surface 48 is aligned with the flat portion 33, so that the sun visor body 11 is held at the storage position of the ceiling surface 12 of the passenger compartment.

The operation and effect of the vehicle sun visor 10 described above will be described.
According to the vehicle sun visor 10, the curved inner surfaces 47 </ b> A and 47 </ b> B of the first and second plate-like portions 43 and 45 that sandwich the rotating shaft 30 are in surface contact with the peripheral surface 35 of the rotating shaft 30. . For this reason, the contact area of the shaft 30 for rotation and the leaf | plate spring 40 becomes remarkably large compared with the past. Thereby, the clamping force of the leaf | plate spring 40 with respect to the shaft 30 for rotation can be heightened, and a big frictional force can be obtained between the shaft 30 for rotation and the leaf | plate spring 40. FIG. As a result, even if the mass of the sun visor body 11 is large, the rotational torque of the sun visor body 11 can be set high, so that the sun visor body 11 can be more reliably held at the use position.

  Moreover, the 1st plate-shaped part 43 is comprised by the some division | segmentation piece 43a, 43b, the contact area of the shaft 30 for rotation and the leaf | plate spring 40 can be enlarged in the curved plate-like division piece 43a, and the flat piece-like division piece 43b. The sun visor body 11 can be held in the retracted position by being aligned with the flat portion 33 of the rotating shaft 30. Thereby, the function which hold | maintains the sun visor main body 11 reliably in a storing position can be provided to the leaf | plate spring 40, maintaining the function which hold | maintains the sun visor main body 11 more reliably in a use position.

  Further, since the plate-like divided pieces 43b for holding the sun visor main body 11 in the retracted position are arranged on both sides of the curved plate-like divided pieces 43a for increasing the turning torque of the sun visor main body 11, the axis of the turning shaft 30 is arranged. The balance of frictional force is improved in the direction. As a result, the operability of rotating the sun visor body 11 can be improved.

  As mentioned above, although this invention was demonstrated using embodiment, it cannot be overemphasized that the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiments. Further, it is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Vehicle sun visor 11 Sun visor main body 12 Ceiling surface 30 Shaft for rotation 33 Flat part 35 Peripheral surface 40 Leaf spring 42 Shaft clamping part 43 1st plate-shaped part (one plate-shaped part)
43a Curved plate segment 43b Flat plate segment 45 Second plate portion 46 Slit 47A Curved inner surface 47B Curved inner surface 48 Planar inner surface R1 Curvature radius R2 Curvature radius R Curvature radius

Claims (2)

A vehicle sun visor having a sun visor body with an awning function,
A columnar rotation shaft that rotatably supports the sun visor body;
A leaf spring that is provided in the sun visor body and that fits on a circumferential surface of the turning shaft to apply a turning torque to the sun visor body;
The plate spring, have a plate-like portion of a pair of sandwiching the rotating shaft to face,
Each of the pair of plate-like portions has a radius of curvature that is substantially the same as the peripheral surface of the turning shaft, and sandwiches the horizontal shaft portion of the turning shaft to give a turning torque to the sun visor body. it is formed with a radius of curvature which allows, in surface contact with the peripheral surface of the rotating shaft, it has a curved inner surface,
Further, the rotating shaft is provided with a flat portion that holds the sun visor body at a storage position on a ceiling surface of a passenger compartment,
One plate-like portion of the pair of plate-like portions has a plurality of divided pieces arranged in the axial direction of the rotating shaft through a slit,
The plurality of divided pieces are:
A curved plate-shaped divided piece having a curved inner surface that is in surface contact with the rotating shaft;
When the sun visor body is rotated to the retracted position where the sun visor body is held, a flat plate-like divided piece having a flat inner surface is fitted to the flat portion of the rotation shaft.
A vehicle sun visor. The flat plate-like divided pieces are arranged on both left and right sides with the curved plate-like divided pieces interposed therebetween.
The vehicle sun visor according to claim 1.

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