JP2604565Y2 - Support structure of sun visor for vehicles - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION This invention relates to a support structure for a sun visor for a vehicle.

[0002]

2. Description of the Related Art A support shaft of a sun visor for a vehicle has a vertical axis portion attached to a front edge portion of a ceiling surface of a passenger compartment via an attachment member, a sun visor extending substantially horizontally from one end of the vertical axis portion. In general, the main body has a structure including a horizontal shaft portion rotatably fitted to a storage position along a vehicle compartment ceiling surface and a light shielding position along a windshield surface. In such a spindle,
It is known that when an excessive load in the direction perpendicular to the surface of the sun visor body at the light blocking position acts on the support shaft, the support shaft is broken at the longitudinal axis of the support shaft to improve safety.

[0003] Conventionally, as a structure having a structure in which the longitudinal axis of a support shaft is broken by a load equal to or more than a predetermined value, a structure disclosed in Japanese Utility Model Publication No. 60-40321 is known. That is, in this case, a notch-shaped narrow neck portion as a stress concentration portion is recessed on the outer peripheral surface of the longitudinal axis portion (base portion) of the support shaft.

[0004]

By the way, in the above-mentioned prior art, when a downward load is applied to the support shaft when rotating the sun visor body, the narrow neck portion of the vertical axis portion is unexpectedly deformed. Or breakage occurs, and there is a problem in durability. The purpose of the present invention is to provide a structure in which the longitudinal axis portion is easily broken only when an excessive load in the direction perpendicular to the surface of the sun visor body in the light shielding position is applied to the support shaft in view of the above-described conventional problems. An object of the present invention is to provide a support structure of a sun visor for a vehicle, which can improve durability by providing required rigidity in other directions.

[0005]

In order to achieve the above object, a supporting structure of a sun visor for a vehicle according to the present invention includes a longitudinal axis portion attached to a front edge portion of a ceiling surface of a passenger compartment via an attaching member. A horizontal shaft portion extending substantially horizontally from one end of the vertical axis portion, and the sun visor body is rotatably fitted to a storage position along the vehicle compartment ceiling surface and a light blocking position along the windshield surface. The longitudinal axis of the support shaft of the vehicle sun visor provided
At a predetermined position, a stress concentration portion is recessed,
In the part, the thickness of the front and rear parts is formed smaller than the thickness of the left and right parts
When an excessive load in the direction perpendicular to the surface of the sun visor body at the light shielding position is applied to the support shaft, its longitudinal axis is easily broken at the stress concentration portion , and the stress concentration is Part has required rigidity and is hard to break
It has a good structure.

[0006]

In the spindle structure of the sun visor for a vehicle configured as described above, only when an excessive load in the direction perpendicular to the surface of the sun visor body at the light shielding position acts on the spindle, the vertical axis of the spindle is provided. But breaks at the stress concentration part,
In the other directions, the stiffness has a required rigidity, so that the longitudinal axis of the support shaft is prevented from being deformed or broken at the stress concentration portion when the sun visor body is rotated.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1 to 3, a sun visor 1 for a vehicle is shown.
Is composed mainly of the sun visor body 2, the support shaft 11, and the mounting member 3. The mounting member 3 integrally includes a boss 4 having a tapered bearing hole for the support shaft 11 and a mounting flange 5 protruding from the outer peripheral surface of the boss 4. Then, the mounting member 3 is fixed to the front edge of the ceiling surface of the vehicle compartment by screws at the mounting flange 5. Further, a plurality of locking claws 6 for retaining and supporting the support shaft 11 are formed on the end surface of the boss portion 4 of the mounting member 3 so as to be elastically expandable and contractible by the split grooves.

[0008] The sun visor body 2 via the mounting member 3
Is supported by a hard resin such as a nylon resin containing glass fiber, and extends from a longitudinal axis 12 and one end of the longitudinal axis 12. And a substantially L-shape integrally provided with the formed horizontal shaft portion 18. And
The sun visor body 2 is rotatably inserted into the horizontal shaft portion 18 between a storage position along the ceiling surface of the vehicle compartment and a light shielding position along the windshield surface. The mounting member 3 is provided on the longitudinal axis 12 of the support shaft 11.
A tapered shaft portion 13 to be fitted in a tapered shape is formed, and an outer peripheral surface located at the tip of the tapered shaft portion 13 has a tapered shaft portion.
A locking groove 14 which is engaged with the locking claw 6 and is prevented from being removed when 13 is fitted to a predetermined position of the tapered hole is annularly concave.

The outer peripheral surface of the longitudinal axis portion 12 has a stress concentration portion at a portion adjacent to the large diameter side of the tapered shaft portion 13.
15 is recessed. As shown in FIG. 2, the stress concentration portion 15 has a thickness dimension 16 at the front and rear portions and a thickness dimension 17 at the left and right portions.
Therefore, the sun visor main body 2 in the light shielding position is easily broken when an excessive load is applied in the direction perpendicular to the surface, and has a required rigidity in other directions and is hard to be broken. It has become.

Therefore, when the sun visor body 2 is rotated around the horizontal axis 18 of the support shaft 11 and a downward load is applied to the support shaft 11, the stress concentration portion 15 of the vertical axis 12 Has a required rigidity with respect to the downward load, so that the stress concentration portion 15 is prevented from being deformed or broken. Further, when an excessive load acts on the sun visor body 2 disposed at the light shielding position in the direction perpendicular to the surface, the load concentrates on the stress concentration portion 15 of the longitudinal axis portion 12 of the support shaft 11, When the stress concentration portion 15 is broken, the sun visor main body 2 falls off, thereby improving safety.

[0011]

[Effect of the invention] As described above, according to the invention,
Only when an excessive load in the direction perpendicular to the surface of the sun visor body in the light blocking position acts on the support shaft, the vertical axis of the support shaft is broken at the stress concentration part, and the required rigidity in other directions With this configuration, it is possible to prevent a problem that the longitudinal axis of the support shaft is deformed or broken at the stress concentration portion during the rotation operation of the sun visor main body, and the durability can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a support shaft structure of a vehicle sun visor showing one embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II of FIG.

FIG. 3 is an explanatory view showing a mounted state of the vehicle sun visor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sun visor for vehicles 2 Sun visor main body 3 Mounting member 11 Support shaft 12 Vertical axis part 15 Stress concentration part 16 Thickness dimension of front and rear part 17 Thickness dimension of right and left part 18 Horizontal axis part

Claims (1)

(57) [Scope of request for utility model registration] 1. A longitudinal axis portion which is attached to a front edge portion of a ceiling surface of a vehicle interior via an attachment member, and extends substantially horizontally from one end of the longitudinal axis portion, and a sun visor body extends along the vehicle interior ceiling surface. In a support shaft of a vehicle sun visor having a horizontal shaft portion rotatably fitted to a storage position and a light shielding position along a windshield surface , a stress concentration portion is concave at a predetermined position on the vertical axis portion. The stress concentration part has a thickness dimension of the front and rear parts and a thickness dimension of the left and right parts.
When the excessive load in the direction perpendicular to the surface of the sun visor body at the light shielding position is applied to the support shaft, the longitudinal axis thereof is easily broken at the stress concentration portion , and in other directions, The stress concentration part has required rigidity
A support structure for a sun visor for a vehicle, wherein the support shaft structure is difficult to be broken .