JP2005289130A - Sun visor for automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sun visor for an automobile which has a structure improving air permeability while keeping stiffness as a sun visor, and sound absorbing performance, in regard to a sun visor formed by using a reinforcing board such as corrugated cardboard as a core material, by surrounding an outer periphery thereof with a frame element formed by bending metallic wire, and by coating the outside of that with a facing material such as fabric or leather. <P>SOLUTION: A sun visor core is composed of the frame element made of: the metallic wire; a platy core material disposed inside of the frame element, having a plurality of ventilating holes in a surface, and which is 2 to 30% in a hole area rate defined by a ratio of total area of each hole to a projected area; a cushion element of of high permeability covering the outside of the platy core material and the frame element; and the surface material of high permeability covering the outside of the cushion element. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a sun visor used for light shielding in an automobile interior, and more specifically to a sun visor having sound absorption performance and a noise reduction effect.

Conventionally, a sun visor for shading is provided in the passenger compartment of an automobile so that the passenger's eyes are not dazzled by direct sunlight or lighting of an oncoming vehicle. This type of sun visor forms a sun visor core that has a design property by covering a skin material such as fabric or leather with a plate-shaped core material, and is fixed at a position near the front window of the automobile ceiling By inserting one side edge of the sun visor core through the supported shaft, the shaft is rotatably supported. When the sun visor is not in use, it is stored by rotating it to the storage position on the ceiling, and when it is in use, it is rotated downward about the support shaft so that it is positioned between the occupant and the front window. A part of the vehicle is blocked, and excessive light is prevented from entering the eyes of passengers and hindering driving.

Such a sun visor usually has a configuration in which the occupant has a part of the sun visor and is manually rotated, and even if force is applied by the occupant during the rotation operation, the visor is bent or deformed. It is necessary to have a certain degree of rigidity so that it does not occur. For this reason, the sun visor body (sun visor core) is made of a plate-like core material having a certain rigidity, such as a wood board, a thermoplastic resin molded body, or a resin particle foam molded body.

There are various materials and forming methods for forming the sun visor core. Of these various forming methods, a metal wire or the like is bent in advance so as to have a desired outer shape of the sun visor. A reinforcing plate is fitted between the frames, fixed to the frame with tape or the like, and the integrated frame and the reinforcing plate are sandwiched by slab urethane or the like serving as a cushion layer from both sides, and the outer side is vinyl chloride. In some cases, the cover material is covered with a pair of rectangular skin materials such as materials, and the skin materials are joined and cut together by high frequency welding or the like according to the outer peripheral shape of the sun visor.

An example of a sun visor formed by such a method is disclosed in Patent Document 1. A cross-sectional view of the sun visor disclosed in Patent Document 1 is shown in FIG.
The automotive sun visor 1 has a plate-shaped core 3 made of corrugated cardboard or the like disposed inside a frame 2 formed by bending a metal frame so as to have a substantially outer shape of the sun visor 1. The sun visor core is sandwiched between a pair of cushioning pad materials 4 molded according to the outer shape of the sun visor core, and the padding 4 has an inner envelope equivalent to the sun visor core. The skin material 5 formed in a bag shape having a space is covered.
6-845 (Japanese Utility Model Application No. 4-39390)

The inventors have conducted experiments and detailed analyzes using actual vehicles, and as a result, the sun visor is mainly composed of a sound-absorbing material having high air permeability, thereby reducing the sound field environment for the vehicle occupant. It has been found that it can be significantly improved, that is, it has an effect of reducing noise such as engine noise and wind noise entering the passenger compartment, and the sun visor can contribute to improvement of quietness in the passenger compartment.

In general, the installation position of the sun visor in the passenger compartment of an automobile is very close to the head of the passenger such as the driver sitting in the front seat, so that the sound absorbing sun visor has a relatively small projected area with respect to the passenger compartment of the automobile. Nevertheless, it has become clear that the occupant's sound field environment can be improved as much as possible by equipping the sun visor with sound absorbing performance.

However, sound absorption is not considered in the conventional sun visor, and the skin material and the cushion body used for the sun visor have low air permeability, and these are temporarily high air permeability. Even so, the core material was a plate-shaped core material with low air permeability, and sound waves were reflected on the surface, so that the sound absorbing property was extremely low.

In the present invention, a sun visor using a reinforcing plate and a metal frame as a core material, that is, a reinforcing plate such as a corrugated cardboard, as a core material, which has been conventionally performed among a number of sun visor manufacturing methods. The sun visor, which is formed by surrounding the outer periphery with a frame formed by bending a metal wire and covering the outside with a skin material such as fabric or leather, maintains the rigidity as a sun visor while maintaining the air permeability. An object of the present invention is to find an optimum configuration that can be enhanced and to provide an automobile sun visor having sound absorption performance.

Means of the present invention for solving the problem is a plate-like sun visor installed in a passenger compartment of an automobile for the purpose of anti-glare of an occupant, the frame body forming an outline of a substantially sun visor, and the frame body A plate-shaped core material that has a plurality of air holes in the surface and has an opening ratio defined by a ratio of the total area of each air hole to a projected area of 2 to 30%, An automobile sun visor comprising a highly breathable cushion body enclosing the outer side of the plate-shaped core member and a highly breathable skin material encapsulating the outside of the cushion body. Further, the air permeability (JIS L1096) of the cushion body applied here is 6 cc / cm ² / second or more, and the air permeability (JIS L1096) of the skin material is 6 cc / cm ² / second or more.

By configuring the sun visor to have a high air permeability as described above, noise such as engine noise that has entered the passenger compartment and wind noise generated during driving, particularly noise that has reached the position of the passenger's ears, can be obtained. The sound wave that is captured inside is converted into frictional heat with the cushion body that constitutes the sun visor and attenuates. As a result, the sun visor reaches the occupant with noise. Can be reduced as much as possible.

The best mode for carrying out the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view in which a part of a sun visor 10 representing an embodiment of the present invention is cut away. FIG. 2 is a cross-sectional view taken along line AA of the sun visor 10 showing an embodiment of the present invention.

The sun visor 10 for automobiles of the present invention includes a substantially rectangular plate-shaped core member 40, a frame 30 that forms the outer shape of the substantially sun visor 10, and surrounds the outer periphery of the plate-shaped core member 40, and the plate-shaped core. An L-shaped support shaft 50 is provided on one side edge of a sun visor core made up of a cushion member 21 that encloses the outer periphery of the material 40 and the frame body 30, and a skin material 20 that encapsulates the outer periphery of the cushion body 21. By being inserted, it is pivotally supported via a mounting bracket or the like near the front window of the vehicle interior or ceiling.

The frame body 30 is formed by bending a wire made of a metal having a diameter of 2 mm to 10 mm so as to be approximately the outer shape of the sun visor 10.

The plate-like core member 40 can be made of a PP-based honeycomb board, a PS board, a Noryl base material, or the like, in addition to a woody base material such as corrugated cardboard, and fits inside the frame body 30. The mold is formed so as to have a shape. The plate-shaped core member 40 has a thickness of about 1 to 10 mm, and the air permeability is increased by providing a plurality of vent holes 41 in the surface direction. It is suitable that the aperture ratio defined by the ratio of the total area of each vent hole 41 to the area is 2 to 30%. If the hole area ratio is less than 2%, the sun visor does not reach the air permeability sufficient to exhibit sound absorbing performance, and if the hole area ratio exceeds 30%, the rigidity required for the sun visor is obtained. It was confirmed by experiment that it is not preferable because it disappears.

The vent hole 41 needs to have rigidity so as not to be bent or deformed when the sun visor 10 is operated. Therefore, the outer shape of the vent hole 41 is preferably close to a circle. If the air holes 41 formed in the core material 40 are visible from the outside through the skin material and the cushion body, the appearance of the air holes 41 deteriorates and there is a problem in the design as an interior material. Is preferably formed to have a size of 5.0 mm or less.

In addition, the air holes 41 may be formed uniformly or non-uniformly and separated from the support shaft 50 of the plate-like core member 40 that is considered to be frequently gripped by a passenger when operating the sun visor 10. Alternatively, the area near the edge may be partially set to have a low hole area ratio to increase rigidity.

The knob 52 is made of a thermoplastic resin such as polypropylene, and has a cylindrical shape with a hollow inside, so that the knob 52 made of the metal frame is inserted and held. The knob 52 is locked to a hook provided in the ceiling portion in the automobile compartment and plays a role of stably holding the sun visor 10.

The leaf spring 51 elastically biases the support shaft 50 so that the support shaft 50 can rotate, and an occupant of the automobile grasps one end of the sun visor core and rotates the support shaft 50, so that the sun visor core is placed on the ceiling. It can be arranged at an arbitrary position between the non-use position along the line and the use position between the occupant and the front window.

The cushion body 21 is made of an elastic body such as felt or slab urethane, and is a highly breathable material having an air permeability (JIS L1096) of 6 cc / cm ² / sec or more. In this way, by increasing the air permeability, the sound wave can be transmitted without being reflected, so that the sound wave can be easily taken inside the sun visor. The cushion body 21 also plays a role of making it difficult for the occupant to feel the unevenness caused by the plurality of air holes 41 formed in the plate-like core member 40 when the sun visor core is gripped and operated. By using a highly elastic material as the cushion body 21, it is possible to prevent a sense of incongruity due to unevenness and to provide a feeling of touch suitable as an interior material.

The skin material 20 is a design suitable as an interior material to be installed in an automobile interior by using a non-woven fabric or knit made of highly breathable polyester fiber having a permeability (JIS L1096) of 6 cc / cm ² / second or more. In addition, the sound wave can be easily taken into the sun visor.

The thickness of the sun visor according to the present invention, that is, the thickness from the skin material on the surface of the sun visor core to the skin material on the back surface of the sun visor core is suitably 10 mm or more. More preferably, the thickness is 15 mm or more.

As a manufacturing method of the sun visor 10, first, a metal wire is bent so as to form a substantially outer periphery of the sun visor 10, thereby forming the frame body 30. Subsequently, a plate-like core material 40 such as cardboard molded into a shape that fits inside the frame body 30 is positioned inside the frame body, and the frame body 30 and the plate-like core material 40 are taped or the like. And a pair of cushion bodies 21 cut from both sides of a highly breathable elastic body such as felt or slab urethane into a size that just covers the frame 30 and the plate-like core member 40. Further, the core of the sun visor 10 is formed by sandwiching the outside with a pair of highly breathable skin materials 20 made of nonwoven fabric or knit, and joining and cutting the outer periphery by ultrasonic welding. .

In order to perform the terminal treatment by the ultrasonic welding, it is suitable to mix low-melting fibers in the cushion body 21 and the skin material 20. The terminal treatment of the sun visor performed by ultrasonic welding may be performed by heat welding or a method by sewing and cutting.

Various accessories such as vanity mirrors and ticket holders can be appropriately added to the sun visor core in the present invention. In this case, in order not to lower the hole area ratio of the plate-like core material, the hole area ratio of the portion where no accessory is added is increased so that the overall sound absorption coefficient does not decrease.

The sun visor exhibits the most sound-absorbing property in the use position where the sun visor is pivoted and suspended around the support shaft, but also in the storage position along the ceiling, the ceiling interior material is a ventilation type with sound-absorbing properties. Further, due to the synergistic effect, the sound absorption is further improved, and a preferable combination is obtained.

Conventionally, it is used only in a limited number of situations, such as when anti-glare is required during driving, so it is used less frequently and gives a redundant impression when not in use. By adding a function as a sound absorber that absorbs noise that has entered the vehicle interior and contributes to the quietness of the interior of the vehicle, the vehicle sun visor can be used even during daily driving without anti-glare. It becomes possible to make the visor function significantly.

It is the perspective view which notched a part of sun visor which shows embodiment of this invention. It is the sectional view on the AA line of FIG. Sectional view of a conventional sun visor corresponding to FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Sun visor 20 Skin material 21 Cushion body 30 Frame body 40 Plate-shaped core material 41 Ventilation hole 50 Support shaft 51 Leaf spring 52 Knob

Claims (3)

A light-shielding sun visor installed for the purpose of anti-glare for an occupant in a passenger compartment of an automobile, comprising a plate-shaped core material and a frame surrounding the outer periphery of the plate-shaped core material. Is formed with a plurality of air holes penetrating in the surface direction, and the opening ratio defined by the ratio of the total area of each air hole to the projected area of the plate-like core material is 2 to 30%, and A sun visor for automobiles, characterized in that a plate-shaped core material and the outside of the frame body are covered with a highly breathable cushion body, and further, the outside of the cushion body is covered with a highly breathable skin material. . ^2. The automobile sun visor according to claim 1, wherein the cushion body has an air permeability (JIS L1096) of 6 cc / cm ² / second or more. The automobile sun visor according to claim 1, wherein the skin material has an air permeability (JIS L1096) of 6 cc / cm ² / sec or more.

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